After a period of driving, there is a layer of foreign body and dust on the surface of the radiator. If it is not cleaned, it will affect the heat dissipation. After a long time running, the blower motor should be maintained and replaced by the motor. This operation must be judged and maintained by the professional, and the motor can not be dismantled privately. This can cause the short circuit and the motor not to turn, the light person burns insurance, and it causes the burning line and the fire seriously. The motor ventilation pipe can not be removed, and it will easily cause the motor to overheat and burn out after being removed. The variable speed resistor can make the motor change gears. If the one or two gears are used for a long time, it will easily cause the resistance to burn and affect the normal use. The operating system is used for a long time, manipulating the drawing wire is easy to be aged and deformed, so that the manipulating is not flexible or in place, and do not move hard and avoid the damage of the parts. It is found that the problem should be judged at the maintenance station and repaired and replaced according to the specific conditions. The ventilation pipe is the No. 1 and No. 2 hose of the warm air blower. Because of the long time used in high temperature, it is very easy to get aging and crack. It should be replaced in time so as to avoid water leakage and cause the temperature of water to be too high and the cylinder head of the engine can be deformed. The hose used for the rubber hose is equipped with charcoal hose, and the poor quality hose is not resistant to corrosion.
The device should pay attention to these points in the use: when the winter temperature is below 0 C, the front windshield will have a layer of ice and frost. Starting the engine, when the water temperature is above 40 degrees centigrade, the control is placed in the defrosting position in the position of the indicator, and circulates in the position of the indoor cycle, and the blower motor is opened to the three gear position. At this time the motor speed is highest and the motor is running for 3 – 5 minutes. Then the gear can be placed in the one or two gear position according to the defrosting condition. During this period, drivers are advised not to leave the cab. If the motor is not turned, the motor should be put back to the closed position immediately, so as to avoid burning resistance. When the outside temperature is low and the driver is multiplied for a lot of staff, the glass will have frost. It can be put in the defrosting position and the position of the outdoor cycle. The motor can be placed in one or two gear positions so that the frost can be removed. When there is no wind blown sand and dust outside, the cycle can be put outside to make the cab air clean. If there is wind sand and dust or when the weather is too cold, put the cycle into the indoor circulation to avoid wind sand and dust entering the cab.
Maintenance skills of warm air blower
Thinking too much is the first to drag yourself down
Always think of some of them
It’s the first to drag yourself down
Combined with several minor incidents that happened yesterday, I deeply felt that thinking too much would ruin a person.
On the way to work, I listened to an audio program, and the host said a girl felt very hard at work. She used to encourage her female boss. Now she was not salty and expressionless to her.
She looked down from work performance to workplace etiquette, slowing down every frame of the memory, trying to disappoint her boss in the end, worrying about whether he would be fired by his boss, and the thought of insomnia was crazy.
Afterwards, she learned that the female boss had only botulinum toxin on her face, and she finally breathed a sigh of relief.
Thinking too much, ruined her confidence and her health.
During the lunch, colleagues talked about the topic of feet blowing. A colleague said that pepper and pepper were placed in the foot bath when it was cold.
Then a male colleague began to diverge his mind. He said that when he had feet, he would add some fresh garlic and garlic, so that the feet would be full of water, flavor and taste, and could be used as a soup base to make noodles.
He portray a lifelike picture full of details and he has no appetite at all.
Thinking too much, ruined his appetite and his mood.
We usually say that when we think too much, we do not mean to think objectively, but to think of some negative and negative ones subjectively.
Always thinking about it = wasting time + dragging down emotions + thinking about injuries, and worrying about personal gains and losses + imbalance of relationship + blackening others + getting nowhere.
Most of these blind thoughts don’t really happen, but we think too much about them, as if we had all these bad things through.
If you think too much, you will consume yourself from all sides.
Two
Your problem is
Think too much and do too little
I received a private letter some time ago.
There is a junior boy, looking at more than one of the older school elder sister to find a job is not easy, he began to panic, no six levels, no party, no skill, no future direction, do not know what they want to do in the future, what can do.
This boy felt the confusion of “low visibility in the future”. I was much more serious than he was. I wanted to worry about insomnia for a whole semester.
The way to extricate myself is to really listen and really feel.
At that time, I didn’t want to take the postgraduate entrance examination directly. Two, I liked my major, but I didn’t want to take it as a career. I wanted to find a suitable employment path based on my own situation.
At that time, I was interested in foreign trade. In addition to learning English and testing certificates, I went to Yiwu to find an internship. It was just one or two months short. I had a long time in interview practice, new training, business etiquette, foreign trade and other aspects.
With this experience, I seem to know the first step after graduation.
You may not know what to do in the future, but you have to do something now. It’s good to find the direction, and if you don’t find it, at least let you get out of the wrong option.
When I read Harvey Ike’s book “the rich and you think differently”, there is a saying that takes the corridor as an example. I think it is wonderful.
“If you really want to know an industry, you don’t have to do everything in the first day, set foot on the corridor, open a lot of opportunities, look at the people and work of different doors in the corridor, and you will find a breakthrough point for yourself.”
Thinking too much will not bring us nearer to the truth. It will only hold us back and delay our progress.
In fact, when you face, experience, and feel, you will find things easier than you think.
Three
The more difficult it is to think of life, the harder it is
Do something constructive
Through one thing, I admire my writing partner, “Qing Ge”.
When she was four months pregnant, she went to do three-dimensional deformity. The doctor said the baby’s heart was not very good. She told me that after hearing the news, her heart was hopeless and helpless.
She made an appointment for amniocentesis and had to wait for a few days to complete the test.
During that time I knew she had a very difficult time. I was worried about her and tried every day to encourage her and comfort her, but it turned out that I was worried.
I always advise her not to be too tired. When she says that the more she thinks about it, the worse she gets. She needs to do something to divert her attention, go to work and write articles.
A month later, she was pleased to tell me that the examination results were normal, but fortunately, I was looking for something to do, avoiding too much thought.
Many times, too much grief is too much, let the heart die. Do something about it.
In the evening, I can’t sleep when I think about my mind. It’s okay to get back to memorize words and do housework again.
In the daytime, instead of thinking about it, it is better to organize and integrate the fragmented information, or to exercise, to empty the flash memory in the brain.
Female readers often ask me how to avoid glass heart.
From their description, the more leisure people feel, the more they love to think too much, and they always open up their brains in some unimportant matters and self harm.
When you greet people, the other person doesn’t respond. You confirm the details of the offense from beginning to end, but maybe he is only shortsighted.
You sit in your classmate’s bedroom, and you can see that your classmates are wiping the chairs you just sat before leaving. However, your classmates just have a cleanliness.
If you always think about what others think, then you will make your life a trash can.
In my opinion, if you replace your thoughts with constructive thinking and action, you will feel that you and
who don not have a strong heart are not qualified to talk about life
Although the recruitment and selection of West Point is tough enough, 1/5 of the enrolled students each year choose to quit.
A large part of the 1/5 students chose to quit at the end of the year, because in this year they were going through the most famous “wild animal” program in West Point, experiencing a series of cruel tests of physiology, psychology and society. In the end, people who can’t hold up have to choose out.
This phenomenon has attracted the interest of Angela Dakovos, a well-known psychology professor at University of Pennsylvania. Are the tough IQ, EQ, and talent tests that are difficult to prove enough to prove that these students have enough potential? Why can “wild animals” plan to eliminate so many students? You know, those students who quit were originally qualified to enter world famous schools such as Harvard and Yale. Is it the “wild beast” scheme that deliberately embarrass the students, or does this plan really find these students’ personality defects?
Dakota launched a series of studies known as “perseverance test”, investigating students who had succeeded or failed in the years of “wild animal” tests, and found that most of the students who finished the program had a very successful career and a full family, and their success was the “wild beast”. The secret to them is to make them a passionate, resilience and enterprising person, thus achieving great success.
The results of dakworth’s research are summed up in ten experiences, which are regarded as the true secrets of the West Point to develop truly excellent students, and are also called West Point’s most expensive and most valuable lessons: people without a strong heart are not qualified to talk about life.
What are the ten experiences in the end? Will these ten lessons help our career?
One
Even if you have failed, you still have to keep fighting!
A reporter once asked boxing Ali: how many sit ups do you do every day? Ali replied, “I never count how many sit ups I have done. I will always be able to keep muscle pains until I can’t persist. This is the key.”
In fact, it’s the same in the workplace. In a lot of difficult times, you face two choices: either carry the tears with your tears, or make it difficult and painful to knock you down.
Man is a habit animal. Once you start to find reasons for your failure and run away from it, it will become your instinct. In other words, if you always insist on carrying yourself through hardships, you will finally achieve greatness.
Two
You have to eat marshmallow later
Stanford University has a very famous experiment of “cotton candy”. The experimenter will let a child alone in a room with a cotton candy for 15 minutes. The experimenter tells the child before leaving, and if you can’t bear it, you can eat it, but if you don’t eat the marshmallow for 15 minutes, you’ll get two marshmallow as a reward.
In Standford’s marshmallow experiment, 1/3 of the children did not eat marshmallow. Most of their lives were very successful and happy. Children who eat marshmallow were relatively poor and frustrated. Many of them were troubled by drugs, alcohol and obesity.
It turns out that the children who are able to resist the temptation later are very successful, successful, educated, successful, family, and even plagued by obesity.
Perseverance testing shows that patience and delayed enjoyment are a key factor in a person’s success. Dakorvos said that a truly strong person knows that only when he can endure the torment of time and desire can he have the chance to realize his dream.
Three
Even if you have made a mistake of super silly X, you must be fearless and keep trying until you succeed.
A recent College of William and Mary survey of 800 entrepreneurs found that the most successful of these people had two common traits: never afraid of failure and never cared about how others looked at them.
In other words, the most successful people in the world are not afraid of failure. They even regard failure as the only way to life.
Four
You’re an adult, you have to learn to control your emotions
What many people don’t realize is that bad emotions constantly weaken the strength of your heart. An adult can’t control your emotions. The consequences can be disastrous. If you control your brain with emotion, you may lose your ability to think clearly, judgement, willpower and solve problems. It has also been proved that many people who are prone to losing their temper have a series of problems such as irascible, aggressive and overconfident.
Although the emotion can’t be seen, we can still control the mood effectively, for example, you can ask yourself before you lose your temper: where does my anger come from? Why do I have to lose my temper? What is the meaning of losing your temper? Hold on for a long time, and you will be able to control your emotions.
Five
You have to call that phone you don’t want to call
There are many times when we have to do something we don’t want to do very much, because we know these things are valuable in the long run: to get rid of the responsible employees, to call strangers, to work all night to pull the company back from the death line, or for a vital project. Lax struggle.
It’s very easy to give up when facing difficulties, but the best people know that the best choice is also necessary.
Working principle of four stroke diesel engine
The work of the diesel engine is accomplished by the four processes of intake, compression, combustion expansion and exhaust. These four processes constitute a working cycle. A diesel engine with four cycles to complete a working cycle is called a four stroke diesel engine. Now compare the animation above to explain its work.
1. Intake stroke
The first stroke intake, its task is to make the cylinder full of fresh air. When the intake stroke begins, the piston is located at the TDC, and some exhaust gases are left in the combustion chamber.
When the crankshaft rotates the elbow, the connecting rod causes the piston to move from the TDC to the stop point, and at the same time, the intake valve is opened with the transmission mechanism connected with the crankshaft.
As the piston moves downward, the volume of the piston in the cylinder increases gradually: the air pressure inside the cylinder is lower than the pressure in the intake pipe, so the air outside is continuously filled into the cylinder.
The gas pressure in the cylinder varies with the volume of the cylinder during the intake process, as shown in the animation. The vertical coordinates in the figure represent the gas pressure P, and the abscissa coordinates the cylinder volume Vh (or the piston punching S). This figure is called indicator diagram. The pressure curve in the diagram shows the change rule of the gas pressure in the cylinder when the diesel engine works. From the soil we can see that the intake starts with residual gas, so it is slightly higher than atmospheric pressure P0. The air pressure in the intake stroke is lower than the atmospheric pressure in the intake process, so the gas pressure in the intake stroke is 0.085~0.095MPa, and the gas pressure in the cylinder is roughly constant during the whole intake process.
When the piston moves down to the bottom stop, the air flow in the cylinder is still very high, and the inertia is very high. In order to use the inertia of the air flow to increase the volume of air, the intake valve is closed after the piston has passed down the stop point. Although the piston is ascending, the gas can still be filled with a cylinder because of the inertia of the air flow.
Working use of sludge treatment equipment
Sludge treatment equipment sludge dryer is a low fuel consumption and high efficiency drying equipment. The equipment adopts a downstream drying process, especially suitable for fast drying of high moisture sludge that needs to preserve nutrients. Main application: the machine is compact in structure, easy to install and debug, and occupies a small area. The drum and the crushing device are stepless speed regulation, which can meet the drying requirements of different materials. The machine can be used in conjunction with heat sources which use different fuels, such as coal, heavy oil and natural gas. This machine is suitable for the materials such as beer distiller’s grains, starch grains, rice bran grains, and various slag materials such as bean dregs, sugar residue, fruit residue, sauce residue, and high wet materials such as livestock and poultry manure and mud peat.
What kind of master map is a compliance?
1. the main picture must be photographed in real form and not less than 3, and each picture is a square picture with pixels greater than or equal to 750*750.
2. no watermark can be found except the brand LOGO on the main picture, and no form of border, blank, watermark can be found.
It is not allowed to include sales promotion, exaggerated description, contact details, etc.
The description includes, but is not limited to, spike, time discounts, postal packages, * discount, full * * * and so on.
The 3. part of the industry’s background color for the main picture must be a solid background map.
When the CNC machine tools in our country will not match the foreign knives
efore reading, read “why do men not take Wu hook, directly take fifty states in Guan Shan”, always feel high spirited. Wu hook is a bronze scimitar made by Wu in the spring and Autumn period. Just imagine, if we were talking about “why do men not bring foreign knife”, the taste changed, not only unorthodox, but also not prestige. So the Chinese still have to match their own knives.
Undefined
But since the author has entered the machine tool industry, a variety of items, from the upper to the flying aerospace enterprises, to the land line of the car enterprises, are “ocean knife edge array in the front”, large enterprises, small enterprises, all the import tools as baby. People have to sigh: when will domestic machine tools no longer match with foreign knives?
All along, cutting tools have the reputation of “industrial teeth”. The performance and quality of cutting tools can directly affect the production efficiency and machining quality of cutting machines. It is no exaggeration to say that no good machine tool can produce good products without high-quality tools. Therefore, although the tool is small, it has a great effect.
However, from the present situation, the gap between the domestic CNC cutting tools and the imported tools in technology, service, quality and publicity, as well as the low trust degree of domestic customers to domestic CNC cutting tools, has led to a large number of domestic tool market in the country.
The five major foreign cutting tool factions are active in the Chinese market: one is the Santak Department (including mountain high), and the company has a large and complex branch of cutting tool, which has the largest sales volume in the Chinese market; the two is the American Department, which is mainly represented by Kenna, Ingersoll and WAN NAT; and the three is the European Department, which is mainly Germany, including MAP AL, Guehring, Widia, TITEX, Walter and so on; four is Japan and South Korea, including MITSUBISHI, Sumitomo, Toshiba, OSG, Dai Jie, no two, Hitachi and so on, as well as South Korea’s Taegutec, KORLOY company; the five is the Israeli department, mainly ISCAR (Islamic).
These companies have almost filled the market space of Chinese cutters and dominate the market. In some large auto manufacturers, domestic cutters may only account for about 10% of the total.
“The overall strength of China’s machine tool industry is far from that of the developed countries, which is rooted in the lack of core competitiveness.” China Mechanical Industry Council of metal cutting tool technology association Xing Min said.
She believes that structural maladjustment is a major injury to the domestic cutting tool industry, that is, the tool and demand do not match. On the scale of production and operation of cutting tools, domestic NC tool enterprises have not formed a complete cutting tool industry chain. The tool products are not complete, and there are fewer kinds of machine tools that can be matched with them. Foreign tool products start early and have a wide variety of products. They can be used in conjunction with a large number of foreign machine tools.
Taking the car production line as an example, in the initial stage of introducing car model and CNC automatic production line, the domestic matching problems of cutting tools are often ignored, and the technical level of domestic car cutting tools has not been promoted in time. After the introduction of the production line, the special tools and tools have a wide variety of specifications, and the technical and professional requirements are very high. The existing domestic tool varieties, quality, supply and service ability are difficult to meet the requirements, the only choice of foreign tools.
The author believes that life and stability are also a big weakness for domestic knives. High quality cutting tools not only require high technology content, service life and stability, but also very important. Some tool enterprises in China have low tool life and the average life span is only 1/3 – 1/2 of foreign tools. Not every product has a low life expectancy, but a great difference in life span, and the dispersion is too large, resulting in low average life of the tool. There has been such a test: compared to the single piece, China’s tools are not worse than foreign countries, but with the comparison of 10 pieces, 1 or 2 pieces of Chinese knives are not satisfactory. Cutting itself accounts for 90% of the total machining effort. Even if 1 or 2 pieces of tools are out of order, the machining effect will be greatly affected.
In addition, unlike other industries, CNC cutting tools are technology intensive, knowledge intensive, talent intensive industries, and their development relies heavily on talents. CNC cutting tool technical personnel, management personnel, marketing personnel are extremely scarce, the general training cycle is 3 to 5 years. And colleges and universities do not play the responsibility of training CNC tool professionals, can only rely on the enterprise slowly training, to the past times half of the work, and not necessarily retain talent.
In short, it is the existence of the gap that makes Chinese machine tools repeatedly equipped with “foreign knives”. If we wish to match domestic machine tools with domestic tools, we must face these gaps and face the shortcomings of the Chinese cutting tool enterprises in basic technology, innovation ability, promotion ability and service ability, and find others’ strengths, complement their own shortcomings, strive forward and strive hard to catch up even catch up with them. Foreign enterprises.
At present, the cutting tool enterprises, such as Zhuzhou diamond and Xiamen gold heron, have developed rapidly. These enterprises attach great importance to technological progress, personnel training, and have a very good step in the development of modern efficient cutting tools, and also let us see the new hope of the rise of domestic tools.
Today’s standard was founded in 2002, and is the leading provider of CNC walking machine solutions. R & D, production, sales: 16 series of CNC walking machine, 20 series CNC walking machine, 26 Series CNC walking machine, 32 series CNC walking machine.
Description of cryogenic cold water circulating mechanism refrigerant
In the low temperature cold water circulating machine in Wuxi, the refrigerant is very necessary. So, what is the process of the refrigerant running in the cryogenic cold water circulating machine?
DW-A5w118s
(1) the state of the refrigerant. In the whole condensation process, the state of the refrigerant is from the gaseous state – gas-liquid coexistence – liquid.
(2) the temperature of the refrigerant. If the ambient temperature of the cryogenic cold water circulating machine is 25 C, the temperature of the refrigerant in the condenser is close to about 90 degrees C, and the temperature of the final part is about 55. At the same time, the temperature difference between the inlet and outlet of the condenser should be influenced by other factors.
(3) the pressure of the refrigerant. Because the tube section of the condenser in the cold water circulating cooler is large enough for the flow of the refrigerant, the resistance is small, so the pressure of the process is basically the same as the pressure in the exhaust pipe of the compressor.
The next is the throttling of refrigerants: the throttling of refrigerants is accomplished in filters, capillary tubes, and tracheal tubes with capillary tubes.
(1) the state of the refrigerant. In the whole throttling process, the refrigerant’s state is always in the liquid state.
(2) the temperature of the refrigerant. The whole length of the capillary is almost all worn back to the trachea (or welded to the trachea), and the temperature of the refrigerant in the trachea is lower than the refrigerant in the capillary. Both of them flow again. Therefore, the capillary refrigerant of the cryogenic cold water circulating machine will continue to distribute heat while flowing to the evaporator and distribute the heat to the evaporator. The refrigerant in the trachea.
(3) the pressure of the refrigerant. The low temperature cold water circulation machine has a small inner diameter and a longer diameter, so that the refrigerant R12 flowing through the capillary can form corresponding pressure drop in the capillary tube. In order to maintain a certain pressure difference between the evaporator and the condenser.
This is the description of various forms of cold cold water cooling agent in operation, and the user can choose an environment-friendly refrigerant for the refrigerant of its own equipment.
What is the effect of air humidifier
The function of household air humidifier: 1, moistening the air, purifying the environment with the improvement of people’s living standards, the extensive use of air conditioning, causing skin tight, dry tongue, cough and cold and other air conditioning diseases. Part of the humidifier can also release a large number of negative oxygen ions in the process of atomization. It can effectively increase the humidity of the room, moisten the dry air and precipitate it with the floating smoke and dust in the air. It can effectively remove the smell of paint, moldy, smoke and odor, make the air fresher, and ensure the health of your family and your family. 2, moistening the skin, nourishing the hot summer and abnormal dry winter, causing excessive loss of water in the human skin, accelerating the aging of life, the moist air can keep the vitality, the product creates foggy oxygen bar, moisturizes the skin, promotes the blood circulation and metabolism of the facial cells, and relieves nervous tension and elimination. Fatigue makes you glow. 3, adding auxiliary agent, adding plant essential oil or medicinal liquid in the water, emanating with water mist, full room fragrance, making the body more easy to absorb, treating disease and keeping the mind, health care effect, especially for skin allergy, insomnia, cold, cough, asthma, is the best replacement of the traditional aromatherapy products. Choice。 4, fashion decoration, beautiful and practical use of lovely fashion cartoon modeling, floating clouds like dreams, such as romance, such as fairyland, enough to create an unusual creative inspiration. Automatic water protection, fog volume can be adjusted, humidity is automatically balanced.
Beijing otech Technology Co., Ltd. is a modern technology company integrating research, development, sales and service.
Mainly with the sales professional environment temperature and humidity control products and industrial matching humidity control products and purifying new wind products, the use of scientific management model, strict management system, the use of independent design concept, design by years of practical experience designers, to improve the comfort and professional clean environment temperature, Humidity products, absorbing foreign traditional mature product technology, and combining the characteristics of the construction of our machine room and base station, design and manufacture the whole air conditioning for the special humidifier and the base station of the machine room. The whole strength is strong and the sales and service are facing all over the country.
Products include: temperature and humidity control of professional environment; central air conditioning and system humidification supporting products; temperature and humidity control of ordinary environment; professional air conditioning; central air conditioning; industrial water treatment system. Make full use of the advantages of their own sales and service channels, with excellent quality and technology, and personalized professional programs to provide excellent products and service platform for new and old customers.
We are willing to cooperate with all our friends who support and trust us to achieve our dream together. Customers are welcome to call us and look forward to establishing partnership with you.
Products and services
Classification of special humidifier in machine room:
The humidifier, the humidifier, the humidifier of the machine room, the humidifier of the machine room, the special humidifier of the machine room, the special humidifier of the machine room, the humidifier of the machine room, the humidifier of the machine room, the humidifier, the humidifying and dehumidifying machine, the humidifying and purifying the new air machine, the wet film cabinet, the wet film cabinet humidifier and the humidifier;
Classification of special humidifiers in record room:
The humidifier in the record room, the humidifier of the archives warehouse, the cleaning humidifier in the record room, the special humidifier, the humidifying and humidifying machine, the purifying and humidifying machine, the humidifier of the archives
Classification of special humidifiers for electronic plants:
Electronic factory humidifier, electronic workshop humidifier, STM workshop humidifier, electronic industry humidifier, circuit board production humidifier.
Industrial humidifier classification:
Industrial humidifier, industrial humidifier, centrifugal humidifier, ultrasonic humidifier, air water humidifier, two fluid humidifier, ultrasonic humidifier, centrifugal humidifier, high pressure spray humidifier, centrifugal humidifier, and centrifugal humidifier
Classification of central air conditioning humidifier:
The central air conditioning humidifier, wet film humidifier, wet film direct drainage humidifier, wet film water humidifier, wet film wet film humidifier, dry steam heater humidifier, manual dry steam humidifier, electric dry steam humidifier, dry steam humidifier, double vaporization humidifier, double vaporization humidifier, double steam humidifier, and electrode humidification Device, household electrode humidifier, OEM electrode humidifier, electrothermal humidifier, steam steam humidifier, two steam humidifier, electrothermal steam humidifier, high pressure micro fog humidifier, spray humidifier, spray humidifier system;
Classification of air purifier:
Air disinfector, air purifier, electronic purifier, light hydrogen ion purifier, engine room energy saving fresh air, fresh air purifier, PC activated carbon exhaust fan;
Classification of industrial air conditioning:
High temperature air conditioning, air conditioning, air conditioning, base station air conditioning, whole base station air conditioning, base station integrated air conditioning, machine room precision air conditioning, constant temperature and constant humidity air conditioning, energy saving and environmental air conditioning, professional air conditioning, commercial air conditioning; air conditioning water softener in machine room;
Dehumidifier classification:
Dehumidifier, industrial dehumidifier, swimming pool dehumidification unit, humidifier, pipe dehumidifier, heating and dehumidifier, cooling and dehumidifier, temperature regulating and dehumidifier, air dehumidifier, and file dehumidifier.
The influence of test speed on the accuracy of the testing machine
The influence of tensile speed on tensile speed, elongation and yield strength of tensile testing machine is mainly discussed. The influence of the tension tester varies with the material, so the test must be carried out strictly in accordance with the rate specified by the standard test method in the tensile test, otherwise it will affect the accuracy of the test results. The test speed of material tension test machine is in 50~500mm/min, some in 0.001~500mm/min, the former usually uses ordinary trapezoidal wire rod plus speed control motor or variable frequency speed control system, the cost is lower, and the wear is bigger. A long time, a lot of experiments will produce the middle plate shaking, affecting the accuracy of the test, and the time will soon be used, the machine will be noisy and easy to break. The latter uses servo system plus ball screw, with high accuracy, constant speed and stability, small wear and good durability. The test repeatability is also good. The standard all stipulates the test condition, what material speed, because the speed is different, the force value measured is also different.
Three common data of the tensile test:
1. Tensile strength: tensile strength increases with the increase of test speed, but it tends to be stable after reaching a certain stage.
2, yield strength: when the test speed is slow, the difference between yield strength and tensile strength is larger, and the faster the test speed is, the difference between yield strength and tensile strength decreases gradually.
3. Elongation after break: the increase of tensile speed decreases the elongation after fracture, and decreases slowly after a certain stage. (in addition, the large tensile strength and the elongation at the end of the fracture are sensitive to the tensile velocity, while the small tensile strength and the elongation at the end of the fracture are relatively less sensitive to the tensile velocity. ” If the servo system of all kinds of production equipment and manipulator is used, we can go to the automobile factory to see if there is an opportunity. Every part of the automobile parts is exactly the same. Therefore, it is recommended that ball screw with servo system can meet users’ requirements. Of course, the test is not much, the power is not easy to choose the ordinary trapezoidal wire rod plus speed control motor or variable frequency speed control system, economic and practical, the same can get the ideal data.
Material drawing machine test machine related system:
Tension test recording system: full automatic force measurement system, stepless gear, can automatically ensure accuracy, and easily measure the accuracy of the indicator to 0.2%, and most energetically as the finest resolution, automatic identification; automatic standard force, standard length correction system, can be calibrated by any metering department for idiot metering. The bilingual test software on the WIN2000, XP platform of the data system is upgraded at any time, and all curves are printed (the most advanced software output curve report). The test data, such as load, deformation, displacement, velocity, tensile strength, fracture strength, elongation and so on, are dynamically displayed during the test. The test results are automatically stored, analyzed, amplified, calculated and counted.
The frame structure is adopted in the mechanical structure, and the high precision ball screw without gap is loaded to ensure the efficiency of the whole steel and load, and there is a larger test space for various tests to ensure the testing function and simple operation of the machine with large load.
In different industries and testing standards, the speed of tension test required is also different. Before the test operation, the parameters and system should be properly adjusted, and the tension test machine should be maintained and maintained regularly so as to ensure the accuracy of the final test results.
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