Machinery industry – Page 77 – CNC Machining & Turning, Milling, Metal parts

Analysis on the fracture of tapping taps

The tapping machine is a machine tool for machining internal threads, screws, or tooth buckles on the inner surface of the holes of various holes or blind holes with different specifications, such as the shell of the machine parts, the end face of the equipment, the nut, the flange plate and so on. It has the advantages of simple operation, low cost and so on. It is widely used in hardware production, machinery manufacturing and other industries. However, the taps caused by various factors seriously affect the processing efficiency.

First, the quality of the taps is not good
It includes main materials, NC tool design, heat treatment, machining accuracy, coating quality and so on.
(1) the size difference between the transition areas of taps and the design of transition fillets lead to stress concentration, which is prone to fracture at the stress concentration.
(2) the cross section of the cross section of the handle and edge is too close to the weld, which leads to the superposition of the complex stress and the stress concentration in the cross section of the cross section, resulting in a larger stress concentration, which causes the taps to break in the use.
(3) improper heat treatment process. If the taps are heat treated without quenching, quenching, overheating or overburning before heating, premature tempering and cleaning can lead to cracks in the tap.
Countermeasures: choose a reliable and reliable taps brand and a more suitable taps.

Two. Unsuitable selection of taps
For high hardness parts, high quality taps should be used, such as cobalt high speed wire cones, carbide taps, coated taps, etc. In addition, different tap designs are applied to different workplaces, such as the number, size and angle of the chip removal slot, which affect the chip removal performance.
(1) for the refractory materials with high hardness and high hardness, such as precipitated stainless steel and high temperature alloy, it may be broken that the taps are not strong enough to resist the cutting resistance of tapping.
(2) the mismatch between the taps and the processed materials has been paid more and more attention in recent years, and the variety of tool materials is increasing continuously. It is necessary to choose the suitable taps before the tapping.
Countermeasures: the taps of high strength materials such as high temperature steel, such as powder high temperature steel, are used to improve the strength of the taps, and to improve the surface coating of the taps to improve the surface hardness of the silk screen; in extreme cases, even manual tapping may be a feasible method.

Three. Overwear of taps
The overwear of the taps is a very common case. After the taps are machined, the cutting resistance of the taps becomes larger because of the overwear of the taps, which leads to the disassembly of the taps.
Countermeasures: it is recommended to use a special taper, which will obviously delay the taper wear and thus improve the service life of the taps; at the same time, the use of high quality tapping oil can also effectively delay the taper wear.

Four, axial synchronization error
In the process of tapping, a large number of broken taps are due to the error of the synchronism of the spindle rotation and the axial feed, which makes the tap of the taps increase and cause the taps to break.
Countermeasures: using special tap handle to solve the problem of axial synchronous error compensation for rigid tapping.

Five. It is difficult to break chip and chip
For the blind hole tapping, the screw taps are usually used for the tapping of the back of the spiral groove. If the iron chips are entangled on the taps, the taps will not be discharged smoothly, and a large number of processed materials are usually difficult to break the chips.
Countermeasures: first, change the spiral angle of the taps to make the iron chip removed smoothly; at the same time, the cutting parameters are properly adjusted to ensure that the iron chips can be eliminated smoothly; when necessary, the variable spiral angle taps can be selected to ensure the smooth discharge of the iron chips.

Six. The aperture of the bottom hole is small
When the tap hole is selected, the diameter of the bottom hole will be increased by using the unreasonable bottom hole diameter, so that the tap can be broken.
Countermeasures: it is suggested that the correct bottom hole diameter should be selected according to the variety of taps and the different material of the tapping. If the bit is not fully conformed, the larger one can be selected.

Seven. The problem of material quality
The impure parts are impure, and there are some excellent points or blowholes, causing the tap to lose balance and break instantly.
Countermeasures: before the processing, the performance and quality of all raw materials should be tested and verified completely, and the unqualified raw materials should be prohibited.

Eight. The precision requirement of the machine tool has not reached the taps
Machine tools and clamping bodies are also very important, especially for high quality taps, as long as a certain accuracy of machine tools and clamping body can play the taps performance. The common thing is that the concentricity is not enough. When the tapping begins, the taps are not located correctly, that is, the main axis of the spindle is not concentric on the center line of the bottom hole, and the torsional torque is too large during the tapping process, which is the main reason for the taps broken.
Countermeasures: comprehensive calibration of machine tool equipment, reduce accuracy error.

Nine. The quality of the cutting oil or tapping oil is not good
The use of oil, vegetable oil and other non special oil products as cutting fluid, the quality of the products processed is easy to appear burr and other bad conditions, and the taps will also have a great reduction in life.
Countermeasures: using the special tapping oil instead of non exclusive oil products can significantly improve the processing effect.

Ten, the cutting speed and feed are not reasonable
When the cutting speed and feed rate decrease hours, the propelling force of the taps will be reduced, and the thread precision of the production is reduced greatly, so the roughness of the thread surface is increased, the screw aperture and the thread precision are not controlled, and the burr is certainly more unavoidable. But too much torque is too fast to cause too much torque.

Is the deceleration motor applied to those machines?

The decelerating motor is composed of a reducer and a motor. The function of the deceleration motor is: the power transmission mechanism, using the speed converter of the gear, decelerates the number of rotation of the motor to the number of revolving required by the equipment, and gets the mechanism with greater torque. The reducer is widely used in the mechanism for transmitting power and motion. As many articles have introduced to the reduction motor widely used in metallurgy, chemical steel, cement, cement, mine, light industry, printing, sugar, food, construction, lifting transportation, Jue gum, pickles, fan and other industry equipment. In order to let everyone understand the function and use of the decelerating motor more vividly, we have arranged the following transmission machinery and equipment to use the decelerating motor.
Jiangsu, Europe and the United States Motor Manufacturing Co., Ltd. under the online sales of one and a half, our distributors throughout the majority of cities in the country. The #O web link deceleration motor is used on these mechanical equipment: full automatic edge sealing machine, vertical single axis push table milling machine, double axis automatic imitation belt milling machine, cold press, continuous face throwing press, carding tenon butt machine, blower, multi saw machine, lift and down. Platform, mill, cold press, Longmen loading and unloading machine, wood processing line, PU/PV/UV coating production line, etc.

Anti-interference measures for fryer

(1). Anti-interference measures for power supply
The electric pulse igniter in this control system, the executive motor and the solenoid valve are all strong interference sources. In order to prevent the mutual interference from the common power supply, we set up the independent power transformers for the electric pulser, motor and solenoid valve. The transformer selects the isolation transformer, and the RLC network filter circuit is connected to the 220V line side. Eliminate the spike interference from the power grid, and use the multi-stage capacitor filter before and after stabilizing the DC side of the power supply of the single-chip microcomputer.
(two). Interface anti-interference measures
In the interface of the single-chip microcomputer and the actuator with strong interference, the photoelectric isolation technology is used, such as the electric pulse igniter, the water quantity and the air quantity to adjust the motor and so on.
(three). Software anti-interference measures
In software, we use digital filtering of sampled data and software to prevent “flying”.
Because the system adopts more stringent anti-interference measures, the automatic gas water heater can work normally in a strong interference environment.

A brief introduction to the working mode of the coating machine

With the continuous development of society, the extensive application of mechanical equipment has brought great convenience to our life. As we all know, all the boxes need to be sealed with adhesive tape. The use of coater can speed up the work and raise the production efficiency. With the development of production technology, high speed tape coater has been more popular in the market. Then, how does the coater work? Let’s have a look at it. There are two ways of coating. One is to apply a sensitive emulsion on the screen by repeated wet and wet operations, or to add the drying process after each coating. The mechanical properties of polymer materials such as adhesives or coatings are coated on the surface of the material. The concrete foundation damage coating machine of the coating machine is affected by corrosion, aging, equipment vibration and other factors. It will also cause damage to the parts of the concrete base, which leads to the loosening of the bolts of the fastening equipment, which seriously affects the production. The traditional concrete pouring method will greatly prolong the repair time and make it difficult for enterprises to accept it. Polymer composites have also solved this problem very well. The impact resistance and compressive strength of the materials are far greater than the present concrete materials, and they also adhere to the steel and other rough surfaces, and can be quickly solidified. It is a new scientific research achievement to repair the damage of the concrete base of the coating machine.

What should the roller printing machine pay attention to when it is hot stamping?

2018/5/27 12:18:26 Viewers:4

The technology of roller printing machine is used early in the heat transfer printing of fabric. With the rapid development of high technology and personalized dress pattern printing, the roller printing machine has sprung up like bamboo shoots after the rain. All kinds of multifunctional roller printing machines are entering the market.
The work of the roller printing machine is very simple. Its process is to print on the ordinary paper or the high precision printing paper by hot sublimation by hot sublimation, and then heat transfer the corresponding heat transfer equipment to a certain temperature in a few minutes, and turn the color of the image on the paper to a realistic turn. It is a special process on porcelain, porcelain, porcelain, clothing, metal and so on.
What should be paid attention to when roller printing machine is hot stamping? Generally speaking, we should pay attention to four aspects:
1. the transfer paper will be patterned on the quasi woven fabric and placed in the desired position.
2. use an iron or a transfer machine for a few seconds.
3. hot silk stockings should be filled with silicone oil paper to prevent infiltration of hot melt adhesive.
4. tear off the bottom paper (three methods).
Cool off: tear off the paper slowly after complete cooling.
Heat off: tear off the paper immediately while the heat is hot.
Warm off: take a few seconds and tore out the bottom paper when it’s warm.

The adhesive type on the reticle roll of the dry compound machine

The selection of the belt buckle for the belt buckle of the dry type composite belt joint is closely related to the thickness of the belt and the strength of the belt. The belt buckle connection is not reliable and the strength is less than the strong band, which will cause the adhesive tape to be broken at the joint connection.
Improper tension control of dry compound machine can cause a series of problems, such as membrane crimping, film wrinkling, bag making difficulty, peeling strength drop, bag deformation and so on. The setting of tension is determined by the type, width, thickness, environment and temperature and humidity of the oven. There are three kinds of mesh roller of dry type compound machine, that is, cone type, edge type and oblique line type. The oblique line is used for high precision transfer adhesive coating. In dry compounding, the tapered and prismatic roller is common.
PVC or PVG flame-retardant adhesive tape is used in underground coal mine for long-term operation of dry type composite machine. The long run belt surface is subjected to water immersion, wear, coal flow impact and plastic deformation, which will lead to thin, brittle and fatigue damage. With the increase of coal consumption and running time, the breaking tension of the strip decreases.
Article label: hot melt compound machine coater PUR

All said the price of the product decided everything

As the saying goes, I think this sentence is one hundred percent right every now and then, but I still agree with this point of view, and sometimes we will meet the higher price of the product.
When our products have quality assurance and after-sales guarantee, we have to take into account the cost of our investment. Since we want to guarantee the quality of the products, we should use high quality when we use the raw materials, then the cost of our products will go up, and we are the same as our customers. The problem we need to maintain and repair the time is also required costs, a variety of costs together with the cost of a natural high, so the price of our products will also be improved a few. Conversely, if cheap equipment should consider whether his two services are in place? The question is worth thinking

The cost saving of the mortar spraying machine

The characteristics of the mortar spraying machine:
1. It has excellent weatherability. Low thermal conductivity, stable thermal insulation, high softening coefficient, resistance to freezing thawing and aging resistance.
2. The soft cracking technology is used. The elastic modulus change index of each layer is matched by layer by layer, and the allowable deformation is combined with the constrained deformation, so that the deformation stress can be dispersed and eliminated at any time. The basic level deformation is adaptable and effectively prevents cracks on the wall surface.
3. The system has no cavity and strong negative wind pressure resistance. It is suitable for multi-storey and high-rise buildings.
4. Good air permeability and strong respiratory function. It has good waterproof function and can remove moisture from insulation layer.
5, the grade of fire resistance is B1 grade.
6. Construction is convenient. Pre mixed dry mix and lightweight aggregate loading technology can avoid the problem of incorrect weighing on the construction site. The construction speed of multi layer and multi layer is fast.
7, the ability to rectify deviation is strong. It has good adaptability to the construction of flat and not high structure, and can effectively correct the local deviation.
8, the comprehensive cost is low. This machine is an electric screw type high pressure mortar spraying machine, with advanced technology, simple operation and maintenance, and can operate skillfully without special training.
9, the mortar spraying machine produced by our company basically has no ground ash, water saving and material saving. It can reduce cost, easy operation, no need to take scaffolding, no mobile equipment, no repair of stubble, and free spraying of yin and yang angle and roof. It has fast speed, high efficiency and low labor intensity.

Small wall spraying machine
1, adapt to spraying materials: wall mortar, fireproof paint, latex paint, real stone paint, cement mortar, dry mortar, thermal insulation mortar, waterproof material, fireproof material, insulation material, sound absorbing material and other water-soluble materials.
2. adjust the flow size, adjust the good spraying effect.
3. apart from being able to switch on the electric control box, it is equipped with remote control switch spray.
4. the connection between the spray gun and the feeding pipe can be rotated for easy operation.
5. the construction efficiency is high and the quality is good.
6. small size, convenient for on-site handling, and low cost and simple maintenance.
7. easy to use, fast, save materials, save labor and save money.
8. material ratio (cement) 0.7:3 mortar. Mortar ratio: mortar transport spraying material, should choose medium sand 1mm sand grain quality accounted for more than 60% of the total sand grain diameter not more than 8mm, ash consistency is not less than 80cm and mixing, slump about 190.

Design of working table for hard alloy hydraulic press

Hard alloy hydraulic press is mainly adapted to the cemented carbide forming process with complex surface morphology and high streamline. With cobalt (Co) or nickel (Ni) and molybdenum (Mo) as binder, the hydraulic press of a hard alloy material made of powder metallurgy process is made into a specific shape through a hydraulic press after granulation.
The products made by cemented carbide forming hydraulic press have the unique shape that other products produced by technology can not achieve. For example, hard alloy rotary file, from the A type -Y type can be pressed through hard alloy hydraulic press, especially the oval, other equipment can not be completed, and the use of “Xinyuan” hard alloy hydraulic machine, you can easily complete your requirements.

Your state of mind determines your state of mind

an e-commerce practitioner, we are likely to do the same thing every day. We will feel boring for a long time. In the process of working, we have no one to inquire about it. In this process, we are sure to feel very confused and can not find the direction. I would like to think of what I work so hard every day for. At this time, our mentality will start to have problems.
Recently, I saw the Korean drama “no life” before. Among the four new professionals in the play, the most important thing I care about is not Zhang Lei, the hero, but Zhang Baiqi, who has many defects in his character. Famous university students, two years of overseas language study, one year’s work travel, all kinds of learning to dominate the awards, he is also down, the resume is not too much better than others. There is no doubt that he is the best of the same group of new people who have entered the company. He has always been a compliment from birth to internship, and that’s why he is confident that he will make the best results in the field and be better than others. After becoming a full-time worker, he was assigned to the new department and submitted a project report. He could not wait to win recognition without success. His immediate supervisor just let him keep his accounts, make the forms and store the goods without contacting him. On the other hand, Zhang grai, the only high school diploma he has always looked down upon, has come to prominence in his work and even received high praise. His heart became increasingly restless, extremely unbalanced, and felt angry that he had no place to play. He began to contradict his superiors and express his dissatisfaction, but he found that his work remained unchanged. At last, he could not bear to start sending resumes to other units and preparing to quit his present job. From the beginning of my love to the sympathy I had not been reused, until this moment, I began to think he was a weak person. It is clear that there is no display of the bright resume and ambitious ambition, but also the rules of the workplace and the interpersonal communication. No matter in any way, it is the strong and the elite of the society, but it loses to the state of mind. Because of his impatience, he was eager to prove his strength; he did not want to continue to do the most basic work because of his high hands and low hands; and because of so many psychological imbalances, he wanted to resign.
In fact, no matter what you do, if your attitude is not fixed, it will bring negative emotions to you. With a lot of negative emotions, it is difficult for a person to treat life rationally.
In contrast, Zhang grai is a man of excellent mentality. Because of his low education, he was mocked by other newcomers and was bullied by some company’s predecessors. Because it was a contract worker, his hard – prepared project could not belong to his own name, and his career life was more difficult than a white flag. He will be sad, but he will never complain. He puts his concerns on himself instead of others. Lack of education, experience is not enough, that is to work hard to learn, let themselves adapt to this job; the project can allow themselves to take over to the last natural very good, but if not, the early efforts are not cost, to themselves is a growth. Because Zhang grai corrected his mindset, he gradually integrated himself into this group, and his work became more and more handy. A good attitude determines whether you have a good state. If the state of mind is not good, even the strong person with great ability will become weak. Fortunately, the later Zhang white flag is aware of his own problems, no longer aim at work, and no longer contend for other people. It is really doing things and taking a positive attitude to meet the challenges of the workplace, and the more the work is done.
There is no big difference between people. The real difference is mentality.