In the 19-20 century, many important steel structures were riveted, such as Eiffel Tower and automobile skeleton. In the late 20, a large number of structures began to be welded, such as the skeleton of a car, but some structures, such as the aircraft fuselage, the steel structure, and so on, used the technology of screw connections. Where are the differences between riveting and screw connection...

Cutting tools are tools used for machining in mechanical manufacturing, also known as cutting tools. Most of the cutters are used in machine, but they are also used by hand. As the tools used in mechanical manufacturing are basically used to cut metal materials, the word "tool" is generally understood as a metal cutting tool. Cutting tools used for cutting wood are called woodworking tools. There...

Song has the advanced performance of Huaigang pill, which is economical, convenient and practical. Because the whole machine and parts of the construction machinery are heavy and the heat capacity is large, the drying method of the antirust coating is generally used to dry the uniform hot air convection. The heat source can be adapted to local conditions, such as steam, electricity, light diesel,...

In the actual processing, the type of thread usually has: common single thread, trapezoidal thread, special thread, special thread and so on. Among them, ordinary thread is the most widely used and joins more than coarse teeth, while thin teeth are used for thin-walled parts or parts with variable load, vibration and impact load, and can also be used for mechanism fine adjustment. When the common...

2. machining center and CNC milling machine tool compensation The tool compensation function includes tool radius compensation, angle compensation and length compensation and other tool compensation functions. (1) the radius compensation of tool radius compensation (G41, G42, G40) is stored in the memory hxx in advance, and XX is the memory number. After the tool radius compensation is executed, ...

Using end mills to machine workpieces on CNC machine tools, we can see clearly that the tool center movement gauge and the workpiece contour do not coincide, because the workpiece contour is formed by the motion envelope of the end mill. The center of the vertical milling cutter is called the cutter location (4, 5 coordinates NC machine tool is called the tool position vector), and the track mete...

CNC lathe, is a high precision, high efficiency automatic machine tool, can process linear cylinder, slash cylinder, circular arc and other complex workpiece. In order to ensure the working precision of the lathe and prolong the service life of the lathe, it is necessary to carry out reasonable maintenance. The commonly used way of maintenance and maintenance of CNC machine tools are: pouring oil...

Bearing as a precision part of machinery and equipment, how to improve productivity of factory, first, the performance of mechanical equipment must be the best, and the most important factor is the bearing performance. Therefore, in the process of production, the factory must have a good inspection of the bearings in the mechanical equipment. This article shares three major identification methods...

Forging is a combination of forging and punching. It is a forming and processing method using forging head, anvil block, punch or mould to exert pressure on billet, so as to produce plastic deformation and obtain the required shape and size. In forging process, the blank has obvious plastic deformation and a large number of plastic flow. In stamping, the blank is mainly formed by changing the spa...

1, The motor does not rotate, should check whether the wiring is correct, power is energized.   2,The spindle radial jumps, abnormal sound, heat phenomenon, check the spindle is loose, adjust the spindle assembly on the lock nut to meet the tightness and appropriate.  3, The whole machine jitter, check the motor seat plate and support bar locking nut, whether the screw is loose, whether the head a...

In the actual processing, the type of thread usually has: common single thread, trapezoidal thread, special thread, special thread and so on. Among them, ordinary thread is the most widely used and joins more than coarse teeth, while thin teeth are used for thin-walled parts or parts with variable load, vibration and impact load, and can also be used for mechanism fine adjustment. When the common...

The principle of direct current welding machine: The direct current welding machine is an electric welding machine with DC power supply. It has the advantages of easy arc ignition, stable arc and good welding quality. It can be said is a rectifier high power DC electric welder, positive and negative difference, the AC input, through the transformer, the rectifier, then the output power decreased ...

What is a quick connector? Quick connector is a kind of connector that can connect or disconnect the pipe without tools. We are more common is some quick connectors, tubing quick connector. In order to meet the different needs of different devices on the characteristics of quick connectors, quick connectors manufacturers produce a wide range of products, but for many consumers it is a hassle, the...

Hydraulic tubing after years of development, has been very mature. Hydraulic tubing is mainly used for oil, water, gas and other non-corrosive or corrosive media, with the increasing demand for such products in many fields, the promotion and promotion of such products is also called the focus of business work. The hydraulic pipe fittings are hydraulic components that connect the high pressure tub...

In order to reduce the vibration and noise of the hydraulic system of CNC machine tools and avoid the enlargement of noise, prevention and improvement should be done from the following aspects.(一) Improvement of the structure of hydraulic system In process control of CNC machine tool hydraulic system, should pay attention to the use of low noise hydraulic components, through the study found that ...

As we all know, stainless steel is difficult to machine material, and its working hardening tendency is high, high temperature strength is high, shear stress in shear slip zone increases, so the total cutting resistance increases, and the tool wear is aggravated. So it is very important to choose the right stainless steel cutting tool. Here is a brief introduction to the selection method and the ...

2.8 avoidance of small round coiling criteriaThere are many advantages for the edge - edge structure of a thin plate member. (1) strengthen the stiffness; (2) avoid sharp edges; (3) beauty. But we should pay attention to two points for curling, one is the thickness of the plate that should be greater than 1.5 times, and the two is not completely circular, so it is difficult to process. The curl sh...

2.2 saving raw material criterion (configuration criterion for punching parts) Saving raw materials means reducing the cost of manufacturing. The fragmented lower corner material is often used as a waste treatment, so in the design of the thin plate component, the lower material should be reduced as much as possible. The blanking is least to reduce the waste of the material. Especially in large qu...

When designing product parts, it is necessary to take into account the problems that are easy to make. Try to think of some methods not only to make the processing easy, but also to save the material, to increase the strength, and to make no waste. To this end, the designer should pay attention to the following manufacturing matters.The craft of sheet metal parts refers to the difficulty of the pa...

1 Introduction Thin fingerboard thickness and its width and length compared to the much smaller plate. Its lateral bending ability is poor, and it is not suitable for the occasion of lateral bending load. Thin plate is a metal for its material, but because of its small thickness, the processing technology of thin plate members has its particularity. There are three kinds of processing technology r...

The precision of the mold is usually used as a "scale" for the precision of the product and the precision of the shape. For products that require strict tolerances, such as IC lead frames or connectors, etc., products with high accuracy are usually considered to be high-precision molds for processing these products. It is estimated that no one will disagree on this point. So which parts of the mo...

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Another welding here also say a sheet metal problem. A lot of plastic low melting point, you can bend. A metal stick test hot on the need to bend the location, and then bending the plate can be. Here to pay attention to grasp the temperature, do not burn through. Still that thing! experiment! experiment! experiment! Dragging your design, product manager, purchasing a field experiment! You have to...

When cutting, it is recommended to open a row of small holes and then cut along the path with a saw. The advantage is that it is not easy to stick to the knife or the saw. The disadvantage is that the interface is serrated and must be processed later. This time can be cut, can be used to repair and repair the flat hanging mill, finishing machine, chamfering. At last the sand paper is grind. This ...

First, we supply a + 15V power to the sensor. The crystal oscillator in the excitation circuit generates 400Hz of Fang Bo. After the power amplifier, the AC excitation power source is generated, and is transferred from the stationary primary coil to the secondary coil through the energy ring transformer. A precise DC power supply consisting of a reference power and a dual amplifier produces a pre...

One, selection of sensitivity 1, usually, in the linear range of the sensors to the sensitivity of the sensor is good, because only the high sensitivity, and the output signal of the measured changes corresponding to the value is relatively large, is conducive to signal processing, but it is important to note that the sensor has high sensitivity, and is independent of external noise measurement ca...

The main function of the sensor 1, people in order to get information from the outside world, must rely on the sense organ, and rely on people's sense organ in the study of natural phenomena and laws and production activities in their function is far from enough, to adapt to this situation, we need sensors, so it can be said that the sensor is the extension of human facial features, also called a...

The sensor is a detection device, can feel the measured information, and can feel the information, according to the law must transform into electrical signals or other information in the form of output required to meet the information transmission, processing, storage, display, record and control requirements, including the characteristics of the sensor. Miniaturization, digitization, intelligent...

1. - look at the material The best is the copper material is relatively heavy, excellent material, greatly prolong the service life of the product; zinc alloy on the market although relatively cheap, but for one year maintenance are easy to break, uncomfortable, see spool generally used Taocifaxin spool, is the product of the heart, life will shut prison depend on it, especially the sealing ring a...

First of all, this is a very good question.1, our company is much lower than your local price on the premise of guaranteeing the quality. In particular, such as CNC, which involves manual work, our labor costs are far below the average country. In addition to the advantage of the RMB exchange rate, we have a great advantage in the price.2, our company's address is only 45 minutes from the port, an...

Hello, our after-sales service will be formulated according to the product you purchased, and will be explained in the contract. The ordinary product will provide at least 3 years' warranty. Our company is responsible for the replacement of the product as our responsibility leads to the disqualification. If the product is not found to be up to the standard during its use, we will replace the prob...

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Angle valve is the angle type valve, angle valve and ball valve, its structure and properties is composed of spherical valve amendment, and the difference lies in the spherical valve angle valve exports and imports into a 90 degree angle, angle valve also called triangle valve, angle valve, angle valve, this is because the pipeline a corner shape in 90 degrees angle valve, so calledangle valve, a...

Hello, my company's mailbox address is allenhicoin..........com. All the questions you can send to this mailbox. When we see the mail, we will reply to you first, because of the cause of the time difference, and in the slowest 20 hours you will receive a reply. Then we will provide the information we need according to your needs. Our company will arrange a plan and offer at the fastest speed accordin...

What are the differences between the CNC processing metal parts and the CNC processing plastic parts? Don't worry, listen to me slowly. Metal parts are relatively simple. After all, processing, the work of this kind of work, is also skilled. In general, there will be no hand tide for a few years. The difference lies in the grasp of different metals. This is relatively good to say. Plastic because...

Centrifugal casting is a casting method to pour metal liquid into a rotating mold and fill the mold under the action of centrifugal force and solidify.Classification of centrifugal casting: According to the position of the rotating axis of the mould in space, the common centrifugal casting can be divided into two kinds.Horizontal centrifugal casting: Centrifugal casting when the rotating axis of ...

It is also known as die casting, the liquid metal is poured into a mold, in order to get the casting a casting method. The mold is made of metal and can be repeatedly used many times (hundreds of times to thousands of times), also called permanent casting.The structure of the metal type: Generally, the metal type is made of cast iron and cast steel. The inner cavity of the casting can be used not...

The principle of the die casting process is to press the metal liquid into a precise metal mold cavity with high pressure, and the metal liquid is cooled and solidified under the action of pressure to form a casting. Cold and hot chamber die casting is the two basic way of die casting. In the cold chamber die casting, the metal liquid is poured into the pressure chamber by hand or automatic pouri...

When the wax is used as a sample, the molten casting is also called "lost wax casting". Investment casting is usually made in the shape of fusible materials, in the appearance of refractory material is coated on the surface of several layers made of shell, the appearance of melt discharge type shell, resulting in no parting surface mold, the casting solution after calcination can fill sand castin...

General sand mold casting: The basic raw materials for making sand mold are casting sand and molding sand binder. Sand casting is the most commonly used silica sand, the high temperature performance of silica sand cannot satisfy the requirements while using zircon sand, chromite sand, corundum sand special sand. The sand binder is the most widely used clay, also can be used in a variety of ganxing...