July 2019 – Page 39 – CNC Machining & Turning, Milling, Metal parts

What kind of radiator is good for LED lighting

At present, the biggest technical problem of LED lighting is the problem of heat dissipation, which leads to LED driving power and electrolytic capacitor as the short board for the further development of LED lighting fixtures. The space of traditional lamps and lanterns is narrow and small.

At present, after the LED light source is on power, about 30% of the electric energy is converted into light energy, and the rest is converted into heat energy. Therefore, it is the key technology for the structure design of LED lamps to export so much heat energy as soon as possible. Heat energy needs to be emitted through heat conduction, thermal convection and heat radiation. Only when the heat is exported as soon as possible can the cavity temperature in the LED lamp be reduced effectively in order to protect the power supply from working in a lasting high temperature environment, and to avoid the premature failure of the LED light source because of the long-term high temperature work.
LED radiator 1
Looking for simple and easy to use, good thermal conductivity, and low cost heat dissipation material has been our pursuit. On the market, it is often used to squeeze aluminum heat sink as LED luminaire for heat dissipation. Its principle is to squeeze liquid aluminum through a fixed mold, and then cut the bar into a desired shape of the radiator, and then after the deep processing. Extrusion of aluminum radiator, its fin can be done a lot of very thin, the maximum expansion of heat dissipation area, heat dissipation wing automatically forms the air convection heat, heat dissipation effect is very good.
LED radiator 2

What are the advantages of using aluminum profile as radiator for comparison with other materials? Such as energy saving, material saving, decoration, price, weight, and so on. The high thermal conductivity of aluminum profiles is the decisive factor for maintaining good heat dissipation function and the most ideal medium for thermal energy conversion. The characteristics are: less time, fast heating, high efficiency, light and smart, and easy to process is a major feature. The radiator of the same specification, the weight of the aluminum profile is 1/3 of the steel radiator.

What are the characteristics and precautions of dental tapping machine

he 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. Suitable for automobile or motorcycle body, frame, chassis, connecting rod, engine, cylinder and various mechanical parts, machine tools, hardware products, metal pipe, gear, pump body, valve, fastener and other parts processing. The following is a brief introduction of the characteristics and points for attention in the following aspects:
First, the characteristics of the tapping machine

(1) teeth with fast speed, high accuracy and attack can be examined by dental examination.
(2) high precision tapping stroke adjustment is simple, automatic reversing device can freely adjust tapping stroke, and shallow hole and hole low machining parts can also be easily adjusted.
(3) the double safety device can prevent the damage of the screw attack, the spindle rotation and the upper and lower, the return knife special double safety clutch, the spindle can automatically stop, the reversing knife will not damage the tool.
(4) the shaft is fully coordinated with the main shaft in accordance with the tooth distance, and the vertical stability, precision and precision are especially high.
(5) it can be operated continuously at high speed, and the special motor can be durable and automatic.
(6) the operator can leave the machine completely, and the beginner can operate smoothly. One person can operate multiple devices at the same time, which can significantly save labor costs.

Two. Attention to the operation of the tapping machine
(1) the position of the work piece of the full automatic tapping machine is correct, and the center line of the threaded hole is placed in the horizontal or vertical position as far as possible, so that the tapping is easy to judge whether the axis of the tapping is perpendicular to the plane of the workpiece. The hole of the threaded bottom hole on the workpiece is chamfered, and both ends of the threaded hole are chamfered.
(2) the taps should be placed as far as possible at the beginning of the attack, and then the taps are added to the taps and the wrench is rotated. The position of the taps should be carefully checked and corrected when the taps are cut in. The taps should be correct. In the future, it is necessary to rotate the wrench instead of adding pressure to the tap, otherwise the thread form will be damaged.
(3) the taps and screw holes must be coaxial when tapping, and the calibration part of taps can not be all out, otherwise they will produce random teeth when they exit the tap. The chips can be easily broken off and broken, and the cutting edges can be reduced due to sticky chips. When you are unable to get through the screw holes, you must quit the tap and remove the chips in the hole.
(4) when changing a tap in the process of tapping, use your hands to spin into the tapping and thread, until you can’t screw in, and then use the wrench to turn. When the end cone is finished, it is also necessary to avoid rotating the wrench rapidly. It is better to use hand to spin out to ensure the quality of the thread has not been affected.
(5) special tapping oil should be used when drilling holes in plastic materials. For ordinary carbon steel, copper and aluminum alloy and other materials, the general machine contains tapping oil from lard. For stainless steels and titanium alloys, high extreme pressure tapping oil containing sulfurized fatty acid esters is the best choice.
(6) the cutting speed of the automatic tapping machine should be adjusted according to the different material. When the same material is used, the tap diameter is higher and the tap diameter is larger.

How to maintain the square pipe punching machine

First, operators should form the habit of daily maintenance when using square tube punching machine. Not only do a good job of cleaning daily, cleaning up the surface of the equipment and stains on the surface of the equipment at the end of the day, but also repair the key parts of the equipment regularly, and appear abnormal or loose and timely treatment.
Two. When the motor is opened, the operator should pay close attention to the observation equipment and see if there is any displacement or abnormal sound. If it appears, it is necessary to check the cause in time.
Three. The pneumatic part clamping and separation action of the square pipe punching machine needs to maintain the flexibility of enough degree. Therefore, it is necessary to check it regularly, not only to see if the pneumatic effect can suck and pull freely, but also to insist on the gas leakage in the air nozzle, and if the occurrence is abnormal, it should be temporarily stopped and given. Accurate and timely maintenance or replacement of parts.
Four, the operator should check the punching hole of the square tube punching machine regularly to ensure that the punch can reach the design target, and ensure that there is no old mouth in the mold, and if there is a problem, it will not be accurate according to the design target.

Innovative technology and production development path of drum screen washing machine

First, product introduction
The roller screen provides a simple, efficient and economical solution for all kinds of raw materials, and also provides optimization for subsequent mineral processing technology. This method helps reduce mineral processing and reduce investment costs, while allowing rapid and mass mineral processing. After treatment, raw materials can directly enter all kinds of mineral processing equipment, such as centrifugal concentrator, spiral chute, jig, etc.
Gravity concentrating equipment.

Two. The principle of work
Drum washing machine mainly consists of motor, reducer, drum device, frame, sealing cover and inlet and outlet. The roller device is tilted on the rack. The electric motor is connected with the drum device through a coupling, and the driving roller device rolls around its axis. Because the material is turned and moved in the drum screen, the material in the sieve can be ejected to prevent the screen hole from being blocked. The principle and structure of the roller washing machine and the moving screen are almost the same.

Three. The course of development
Along with the development and utilization of space more and more extensive, the corresponding roller washing machine technology level requirements are also higher and higher. We constantly improve the handling capacity and fineness of the roller washing machine to make it efficient in use. It is absolutely safe and practical to choose such a roller screen, and it can extend the service life of the drum sieving machine and improve the production efficiency of the entire production line.

EDM line cutting fluid

The wire cutting machine can be divided into high speed wire EDM machine (Reciprocating type High Speed Wire cut Electrical Discharge Machining commonly known as “fast wire”) and low speed unidirectional wire EDM machine (Low Speed one-way). Three types of Vertical Wire Electrical Discharge Machining machine tool With Rotation Wire). It can also be divided into single column cross worktable type and double column type (commonly known as Longmen type) according to the working table. [1]
Wire cutting machine for wire EDM
The wire speed of the reciprocating wire WEDM is 6~12 mm/s, which is a unique product of our country. Since September 1970, the “digital program automatic control line cutting machine” was developed by the national general wind machinery plant of the Ministry of machinery industry third, which was first created in China. In 1972, third the Ministry of machine building made a technical appraisal of the CKX CNC WEDM produced by the factory. In 1973, according to the decision of the third Ministry of machine building, the CNC WEDM machine, numbered CKX – 1, began mass production. In September 1981, DK3220 type coordinate NC machine with taper cutting function was successfully developed. The biggest feature of the product is the 1.5 degree taper cutting function. The major technical improvement of the wire cutting machine is completed. With the gradual improvement of large taper cutting technology, great progress has been made in cutting taper, upper and lower specialties. With the breakthrough of large thickness cutting technology, the accuracy of cross section and vertical section has been greatly improved, and the processing thickness can exceed 1000mm. The reciprocating wire cutting machine has more advantages. At the same time, it meets the needs of customers at home and abroad. The number of this kind of machine tool is increasing at a fast speed, from the output of 2~3 1000 units to an annual output of tens of thousands of units. At present, the stock of the national reciprocating wire cutting machine tool has reached more than 20 units. It has been used in various middle and low grade mould manufacturing and special parts processing, which has become one of the most widely used machines in our CNC machine tools. However, because the reciprocating wire cutting machine can not carry out constant tension control on the electrode wire, the electrode wire shakes greatly, and it is easy to break the wire during the process. As electrical grade wire is reciprocating, it will cause electrode wire loss, machining accuracy and surface quality.
Low speed one-way wire EDM wire cutting machine
The low speed wire cutting electrical wire is used as a tool electrode with copper wire as a tool electrode, and the pulse voltage of 60~300V is applied between copper wire and copper, steel or super hard alloy, and the 5~50um gap is maintained between copper wire and copper, steel or super hard alloy, and the gap is filled with deionized water (close to distilled water) and so on, so that the electric power is filled with 0.2mm/s. The spark discharge between the poles and the processed objects is consumed and corroded, and numerous small pits are etched out on the surface of the workpiece. Through the monitoring and control of the NC control and control, the servo mechanism is executed to make the discharge uniform and so that the machined objects are processed to make it fit the required size and shape precision. Products. At present, the accuracy is up to 0.001mm, and the surface quality is also close to the grinding level. The electrode wire is no longer used after discharge, and the non resistance electrolytic power supply is usually equipped with automatic wire drawing and constant tension device. The work is stable, uniform, small jitter, high machining accuracy and good surface quality, but it is not suitable to process large thickness workpieces. Because of the high precision, high technology content and high price of machine tools, the cost of using machine tools is also high. [1]
The single way wire electrical discharge machine (WEDM) has only the unique type of foreign companies in the early stage. The low speed WEDM in Taiwan started late, but it has developed rapidly over the past few years. One of the key measures is to make a joint contribution by a number of machine tool manufacturing enterprises, with the support of some departments concerned, and the development of a large number of manpower and material resources by the Taiwan Institute of industry and technology. After more than 10 years of research, we have made breakthroughs in key technologies such as control system and power supply. At present, the low speed wire EDM machine made by Taiwan enterprises should belong to the range of the medium machine. The growth rate of 20% ~ 30% in the last 3 years is reached. It is estimated that in the next 5 years, the annual output of the low speed wire EDM machine in Taiwan can reach 2000, which can account for more than 25% of the world market. The low speed wire EDM line cutting machine has high technical content, good market prospect and high return. It is the “competitive place” and “strategic highland” of various manufacturers in the electric processing industry. It can also be said that whoever has mastered the technology of low speed WEDM will get the next opportunity to develop and grow. In order to seize the Chinese market, Japan, Switzerland, Taiwan’s electrical machine tool manufacturing enterprises set up factories in mainland China to produce such machine tools. With the support of the special fund of the Ministry of science and technology, Chinese scientists and technicians have invested a large number of research and development forces and have completed the research and development of a new generation of low speed wire discharge wire EDM machine. It has made a major breakthrough. At present, it has a product with independent intellectual property rights and occupies a certain market share. Its performance indicators can reach a high level. The level of the gear machine. At present, there are still some domestic enterprises hope to develop low speed WEDM technology through cooperation with relevant enterprises in Taiwan. [1]
Vertical self rotating EDM wire cutting machine
Vertical self rotating WEDM (horizontal self rotating WEDM). Vertical rotary EDM line cutting

Teach you to buy stainless steel punching machine

Along with the extensive application of punching machinery and equipment in the processing industry such as rack, furniture, antenna, door flower, guardrail and so on. In the market, all kinds of price and all kinds of related machines are endless. We don’t know how to choose from the salesmen’s endless introduction. How can we buy a high quality stainless steel punching machine?
To buy high-quality stainless steel punching machine, we should do the following:
1, the price is reasonable, the function is diverse, the product quality is guaranteed, these requirements are sure to be considered when we buy stainless steel punching machine.
2, the purpose of choosing stainless steel punching machine is to increase production efficiency. We choose production tools, and pay more attention to the price performance ratio of machines. As long as we fully understand the efficiency of the machine, and how the salesmen blow the sky, there are already numbers in our hearts.
3, fully understand the productivity of the machine, we should consider the configuration of the machine. For example: work and operation principle, motor power and so on. Usually many friends will ignore the thickness of steel plate, even the material of die steel. Are there any reinforcement or thickening of the machine?
4. Whether the design is humanized. Many businesses only consider producing equipment and occupy the market at a low price, but do not pay attention to small details. Small details, such as whether the fuel tank is too long, is it convenient to clean up? Is the cooling system of the machine platform scientific? Wait。
5, in today’s high-tech industry, product upgrading is faster. We have to understand which technology the product belongs to. Where is the advantage compared to the previous generation?
6, a very critical point, is a lot of customers easy to ignore a point: machine plate grinding – a lot of customer friends feel that as long as the grinding tools do not have problems, this steel mill does not need to grind. It’s not like that. If the steel plate on the bottom of the mould is not smooth and smooth, then even a good mold will have problems in the long-term use.
7. After sale problem of stainless steel punching machine. As long as it is mechanical products, it can not guarantee that 100% will not fail. Some businesses sell low prices to attract customers. Lowering the selling price means reducing production costs, which directly affects the quality of machinery. It is also easier to produce after sale problems. Mechanical price is low, is it difficult for us to pay for our after-sale? I’m afraid no business person will do that. But after the failure of the machinery, the production business will not give us any after-sale maintenance. Will the machine become a pile of scrap iron?

Notice of automatic welding machine

The structure of automatic welding equipment consists of welding power, welding head, welding piece moving or changing into device, auxiliary device (wire feeding device, welding machine recovery and transportation device, drag chain, support, electrical control, etc.). Through the structure, we can know the matters needing attention in the automatic welding machine.

1. in order to ensure welding accuracy, the welding platform should be cleaned regularly to avoid sticking oil stains.

2., the equipment must be stable and well adjusted to avoid being affected by accuracy.

3. while the equipment is running, we should pay attention to the welding condition and prevent welding accidents. Operators should not gossip, play mobile phones and do things that are irrelevant to work.

4. operators need to wear protective equipment, welding temperature and electrical fault.

5. failure of wire feeder or feeding device should be stopped in time, and power failure should be checked.

6. automatic welding machine around to avoid debris, prevent power or wire damage accident.

7. under the condition of power on, it is not possible to turn on the numerical control box and various lines by itself, so as to prevent electric shock.

8. turn off the power and gas before leaving work and prevent others from operating at will.

9. in case of welding problems, report to the leader and contact the manufacturer in time, so that the plan can be adjusted.

Why homemade robots are only four big families

Although China has made a lot of efforts in the field of industrial robots in recent years, the progress of domestic robots is obvious to all. However, in terms of comprehensive competitiveness, the domestic industrial robots are still more than the “four families”, such as Na, ABB, KUKA and KUKA. Why in the end?
Undefined

No core algorithm “brain” is not smart enough

In 2015, some people compared the production of domestic robots with ABB in 2005. The result is that the two can not be said to be equivalent, and the ABB product is more prominent in some ways. Because our country has never grasps the core algorithm of the industrial robot core controller, the “brain” of the domestic industrial robot is not smart enough, and the key indexes such as stability, failure rate and ease of use are far inferior to the four families.

Insiders call the core controller the “brain” of industrial robots. Because the core controller is the key component that affects the stability of the robot, software is equivalent to language, transmitting the idea of “brain”. To express the language accurately, it can not be separated from the core algorithms. For many years, the “four families” have sold the key components such as servo systems, decelerator and encoder to the world, but the core algorithm has been in a state of secret. Without the core algorithm, it can be used for the robot products that do not need high precision, but if they want to apply to the aerospace, military industry, automobile manufacturing and other high-end fields, domestic robots will be hard to spare and can only rely on imported industrial robots.

The core algorithm not only has great influence on the core controller, but also has a great influence on the servo system. When each robot moves, the core controller, servo driver and servo motor are required to cooperate with the three parties. Because the core algorithm can not keep up with the servo system, the response speed will be much lower than that of foreign products. As far as the single servo system is concerned, the precision of the domestic robot is good, but the high end robot usually has more than 6 servo systems at the same time, and it is difficult to obtain the desired control effect by the traditional control method.

Through the bottom algorithm, the foreign core controller can operate the motor directly through the current loop of the servo system to realize the precision control under the high dynamic multi axis nonlinear condition. Therefore, the “four family” robots have faster response speed and more accurate positioning. Failing to master the core algorithm is equivalent to a person who is mentally sound but has obstacles in language expression, and can never express himself in the normal language. This problem is reflected in industrial robots, which is one of the important reasons for the low stability and high failure rate.

Decelerator is difficult to be manufactured with high technical difficulty

At present, the world’s largest manufacturer of reducer is nabbotst Precision Machinery Co., Ltd., the company is the world’s dominant professional robot for robot precision cycloid reducer, its core product is the precision reducer RV series. Early in the early 1980s, at the request of the world’s leading robotics manufacturers, nabbottk made the precise and reliable design of the RV reducer, which had already been used successfully in the excavator industry, to be used in the strict robotics industry.

Precision reducer manufacturing, investment and high technical difficulties, there are high barriers. So as far as it is concerned, the industry is basically using the Japanese – made reducer, and if it wants to break through this technical barrier, it will take great effort.

Short development time and insufficient international competitiveness

After nearly half a century of technology precipitation in foreign enterprises, the understanding and optimization of technology is not pursued in a few years in China. Insufficient development of process software has led to the weakness of comprehensive competitiveness of domestic robots. In a single field, compared with the second line brands abroad, in the comprehensive field, there are no advantages for the four big families. In the long run, domestic enterprises are unavoidable to meet the problems of financial difficulties and technical R & D barriers.

Many domestic robot enterprises can not say hard in recent years, but if the core algorithms, decelerator, process software and other aspects are not significant breakthroughs, domestic robots will always be affected by people.

There are many robot enterprises will be troubled by a problem: “I have produced products, but no one to use, how can enterprises survive, how to get development?” I have heard this sound more than once, the domestic robot want to get the development, can not rely solely on the efforts of the enterprise, the support of the policy, the market recognition are the important pillar of the development of the domestic robot. Only in the course of user’s practice, can we constantly give feedback to manufacturers so as to gradually polish out more excellent products. Only in this way, can enterprises have more energy and money to invest in R & D, to break through the core technology, and let domestic robots stand in the center of the world stage.

A series of classifications for different uses of steel lattice plates

Series classification of different uses of steel sheet: Series 1 (spacing 30mm) steel lattice plate is the most commonly used type, used in all industrial fields. The range of the loaded flat steel at the center distance of the series steel plate is 30mm, which is in accordance with the standard of the United States. In the whole steel lattice plate series, it has the strongest resistance to the surface punching. It is widely used in power plants, refineries, sewage treatment plants, granaries, chemical plants, highways, airports and wharf platforms, aisles and drains, staircase steps and so on. The rack steel plate can be used in wet and smooth places, especially for offshore oil production platforms. Series 2 (spacing 40mm) steel plate is the most economical and lightweight, a fixed platform, aisle and staircase, in line with the British standard. In a small span, this is the most ideal product. It is the most ideal product, even under the load of the transport corridor, and can be used as the shelf of the warehouse, the panel of the pavilion, the Zhanqiao. The protection fence, the sun curtain, etc. Series 3 (spacing 60mm) steel grate is a variety developed especially for the application of mining industry. It solves the problem of mineral splashing on the board surface. This series of steel plates has a nominal size of 50*60mm, allowing most of the spatter to wear down, thus ensuring the cleanliness and safety of the plate surface. This product is often assigned to the plate surface in the crushing system, the walkway on the conveyor line, the ball mill, the processing plant and the running station. As a new type of engineering material, steel grid plate is used as a platform, Zhanqiao, bridge, highway guardrail, ditch cover board, fence, gate and other facilities in the fields of metallurgy, energy, ship, municipal, petrochemical, transportation, building materials, national defense and other fields. At present, about 270 thousand tons of steel lattice board are needed in our country. Therefore, the market prospect of steel grid plate is very broad.

How to improve data accuracy of universal plastics testing machine

The universal plastic material testing machine combines the advanced electronic technology, the standardization and the unit control, which has the characteristics of smooth loading, accurate measurement and high acquisition frequency. The accuracy of data of universal plastic material testing machine is not only related to the test accuracy of the instrument itself, but also to the operation quality of the tester operator. In order to improve the accuracy of the test data of the electronic universal testing machine, the operator needs to pay attention to the following points in the condition of the stability of the instrument’s own test precision.

1. Is the design of the universal plastic testing machine reasonable?

The fixture of the electronic universal testing machine is also a very important part. The fixture design is not reasonable. If the clamping tests are all broken near the clamping part, the test data will be abandoned. The main fixture used in universal plastic material testing machine is: pressure reduction accessories, top breaking fixture, rotary stretching clamp, pulling and shearing fixture, etc.

Two. Whether the universal plastic material testing machine was cleared before testing?

All electronic universal testing machines have memory functions. If new tests are started without zero, the data of the last test will be mixed with the data of this test, so that the data calculated by the test machine system is not accurate enough.

Three. Is the clamping of the universal plastic testing machine correct?

The clamping of the sample is an important part of the testing process, for example, when the test is carried out, if the specimen is clamped correctly, the specimen will only bear the force of the upper and lower two directions during the stretching process, and the test results are accurate at this time. If the specimen is skew, the specimen will bear the tensile force in many directions, and the result will not be accurate.

Four. Does the universal plastic material testing machine meet the standard?

In general, each material has the corresponding test standard to test the speed of stretching, bending and so on, too fast or too slow. The measured data are different. In order to improve the accuracy of the test data, it is necessary to set the speed of the test machine in strict accordance with the test standard.