Category Archive Machinery industry

No matter what thing is operated or in the process, there are corresponding operation steps. We need to operate according to its operation steps and strictly follow its method to process. Hardware processing is also the same. What are the operation steps of hardware processing?

1、 All employees of hardware processing shall check whether their clothes meet the work requirements before entering the work post. Slippers, high-heeled shoes and clothes that affect safety are not allowed. Those with long hair should wear safety helmets. Keep correct posture when working, have enough spirit to deal with the work. If you feel unwell, you should leave the post immediately and report to the leader. During operation, it is necessary to concentrate on the operation, and it is strictly prohibited to chat and cooperate with each other. The operator should not operate under the state of irritability and fatigue, so as to avoid accidents and ensure the safety of operation.

2、 Before the machine works, check whether the moving part is filled with lubricating oil, and then start and check whether the clutch and brake are normal, and run the machine tool at idle speed for 1-3 minutes. It is strictly forbidden to operate in case of mechanical failure.

3、 When replacing the mold, the power supply should be turned off first, and the moving Department of the punch should stop running before the mold can be installed and debugged. After installation and adjustment, manually move the flywheel for two times to check whether the upper and lower dies are symmetrical and reasonable, whether the screws are firm, and whether the blank holder ring is in a reasonable position.

Dongguan Hardware processing

4、 Hardware processing must wait for other personnel to leave the mechanical work area, and take away the sundries on the workbench before starting the power supply to start the machine.

5、 After the hardware processing machinery is started, one person will transport materials and operate the machine. Others are not allowed to press the electric building or step on the foot switch board, nor can they put their hands into the mechanical working area or touch the moving parts of the machine with their hands. When the machine is working, it is forbidden to reach into the slider working area, and it is forbidden to take and place the workpiece by hand. The standard tools must be used when taking and placing the workpiece in the die. In case of abnormal sound or machine failure, the power switch should be turned off immediately for inspection.

6、 When off duty, the power supply should be turned off and the finished products, leftovers and sundries should be sorted out to ensure the clean and safe working environment

The design of a product is not as simple as we imagine, but there are relevant steps and methods to carry out the design. It is also necessary to operate strictly according to the method. The same is true for hardware processing. What is the design principle of hardware processing.

(1) the stamping parts of hardware processing design must meet the product application and technical performance, and be easy to assemble and repair.

(2) the stamping parts of hardware processing design must be conducive to improving the application rate of metal data, reducing the types and specifications of data, and reducing the data consumption as far as possible. Cutting and cutting materials to make use of as few scrap parts as possible.

(3) stamping parts must be simple in shape and reasonable in structure, so as to simplify the die structure and simplify the number of working procedures, that is, to complete the processing of the whole part with the least and simplest stamping process, reduce the use of other processing methods, and facilitate the stamping operation, facilitate the organization of mechanization and automation consumption, and improve the labor consumption rate.

Dongguan Hardware processing

(4) for stamping parts designed for hardware processing, under the condition of ensuring normal operation, the dimensional accuracy level and surface roughness level shall be lower as far as possible, which is conducive to the exchange of products, reducing waste products and ensuring the stability of production and quality.

(5) the stamping parts of hardware processing design should be conducive to the use of existing equipment, process equipment and process flow to stop processing, and to extend the service life of the die.

With the continuous updating of the times, our requirements for products are also higher and higher. We must require the products to meet the standards or appearance. Dongguan automatic parts processing is one of them. What are the technical requirements for automatic parts processing?

1： When installing the hydraulic system, it is allowed to use sealing filler or sealant, but should avoid entering the system.

2： The parts and components entering the installation can be installed only with the certificate of inspection part.

3： The unmarked shape service shall meet the requirements of gb1184-80, and the allowable error of unmarked length shall be ± 0. 5mm。

Dongguan automatic parts processing

4： For fasteners with regular tightening torque, it is necessary to select torque wrench and tighten according to regular tightening torque.

5： Before assembly, strictly check and remove the residual sharp angle, burr and foreign matters during the processing of parts. Ensure that the seal will not be scratched during installation.

6： It is necessary to clean and clean the parts before installation, and there shall be no burr, flash, oxide scale, rust, chip, oil stain, colorant and dust, etc.

7： After the bearing outer ring is installed, the end face of the bearing cover at the positioning end shall be evenly touched. There shall be no scratch, scratch and other defects on the surface of the parts.

With the demand of our industry, is constantly increasing, is constantly changing, to our use and all aspects, have changed a lot, the emergence of some processing, not only reduce the labor intensity, but also improve our production efficiency, Tangxia precision hardware processing is the same, so the main application of precision hardware processing lathe parts in some?

Precision hardware processing automatic lathe can reduce the labor intensity of workers, shorten the auxiliary time, and can be supervised by one person for multiple machine tools, with high productivity. In recent years, the function of the international discharge machine bed has been constantly innovated, and the industry has been developing towards precision and automation. The products are used in the processing of small and medium-sized metal parts, which is more labor-saving. For example, it can be used in the field of high-speed wire cutting machine and slow wire cutting machine for processing various types of metal semi-finished products. Thailand, Indonesia, Malaysia and other countries have a large demand for various metal products and semi-finished products. The labor cost in these areas is low, and the number of various factories is large, and the demand for discharge machine bed is considerable. The operators pointed out that the Southeast Asian market has a large demand for discharge machine beds. Manufacturers should continue to strengthen research and development, improve machine performance, especially precision and durability, and strengthen after-sales service. In addition, using computer to control the discharge machine bed is one of the directions worthy of efforts. Precision hardware processing automatic lathe parts are small in diameter, generally less than 16mm in diameter. Its model is lhs21, and its materials are iron, copper, stainless steel, aluminum, magnesium and titanium. Automatic lathe parts are suitable for processing diameter of ￠ 0.25mm – ￠ 42.0mm, and processing length of 2mm-230mm. This material is easy to turn and has simple shape. Large quantities of rotary workpieces, such as small shafts, gaskets, etc., are mainly used in large quantities of small and medium-sized workpieces. The workpieces have high precision arc, taper, and high shape and position requirements. It is characterized by high efficiency and high precision, and can be operated by one person with multiple machines.

Before grinding, it is necessary to inspect the grinding wheel. If the grinding wheel is found to run out, the cylindrical surface is irregular, and the fillet is too large, it is necessary to repair it. Generally, the cylindrical surface of grinding wheel can be trimmed by wheel corrector (diamond dresser, gear wheel dresser, etc.), and the worn-out grinding wheel with relatively high hardness can also be used for dressing. If the side plane of the grinding wheel is still uneven, the grinding wheel can be replaced.

End face grinding technology of end mill:

Technology of grinding end face of end mill

No matter how many edge end mills, first of all, the end face of the cutting edge should be vertical to the axis, which is to ensure that the cutting edge can be in the same plane with respect to the high point. To correct the perpendicularity of the end face of the cutter with respect to the axis of the milling cutter is as follows.

① Visual inspection. With the help of a flat plate, the edge of the end mill can be lowered on the flat plate to watch the skew angle controlled. Then turn the milling cutter 180 ° and watch its control skew angle. If the skew angle difference is observed twice on the same target, it needs to be polished until the same skew angle is observed twice on the same target. Then turn the milling cutter 90 ° and repeat the above actions.

② Correct with a square. Correct with a 90 ° right angle square on a flat plate. After leveling the milling cutter and square, check whether there is a gap between the milling cutter and the square or whether the clearance is average. Thus, it is possible to infer the perpendicularity of the milling cutter, as shown in Fig. 1.

③ Self correction. Clamp the end mill on the chuck of drilling machine or milling machine, place a waste grinding wheel under it, select appropriate speed to start the machine tool, and then move down the milling cutter to grind on the grinding wheel, and grind according to the end face grinding condition.

Technology of cutting cross chip removal groove for end mill

If there is no circular groove in the front of the end eye of the four blade end mill, it is necessary to use the fillet of the grinding wheel to re open the cross groove along the spiral groove target of the milling cutter, and control the depth of 1-2mm (if it is too deep, it is easy to crack, if it is too shallow, it is not easy to grind out the rear corner of the pair). When slotting, pay attention to the side of the grinding wheel to avoid suffering from another blade under it (Note: this cross groove has the function of chip removal. If it does not open, the inclination angle of the edge concave into the middle should be increased).

Edge grinding technology of end milling cutter cutting edge

① When grinding each edge, take the tip of each blade as the benchmark and keep the edge tip as the principle. Grind the front angle (if there is no chipping edge, it is better not to grind), the back angle, the auxiliary back angle (if the cutting amount is large, it is suggested to increase the wedge angle in front of the grinding tool) and the edge inclination angle.

② The selection of the relative angle is 6 ° to 8 ° for the back angle and 1 ° to 3 ° for the edge angle. ? the selection of the back angle depends on the hardness of the workpiece. If the hardness of the raw material is large, the angle will be smaller. The selection principle of the angle of the edge angle is that all four edges must be concave into the middle. The smoother the angle, the better the roughness accuracy. At this time, the deeper the machining depth is (if it is greater than 2 mm, but it should be within the allowable limit), the roughness accuracy will be better, because the whole cutting edge is added with the cutting effect.

③ After grinding, the milling cutter is erected on a platform. If the axis is vertical, all the edge points can be even, and the deviation angle of the cutting edge can be even, so it can meet the requirements.

At this time, it is also advisable to use a 90 ° square on a flat plate for correction. After leveling, check whether there is a gap between the milling cutter and the square or whether the clearance is average. Usually watch two relatively high feet first (the two feet touching the bottom first). If they are not vertical, grind the higher feet so that the two opposite feet are the same height (i.e. vertical). At this time, there is a height difference between these two feet and the other two opposite feet, and the milling cutter will swing. At this point, grind the two higher feet down at the same time. Similarly, turn the milling cutter 90 ° to observe the perpendicularity of the other two opposite feet, and finally make the four feet touch the bottom at the same time and make the milling cutter vertical. Milling cutter after grinding.

In manual sharpening, it is not easy to master the height and angle of the blade. In practice, it is necessary to vary from person to person. As long as you pay attention to grinding out a little back angle, you may as well. In addition, if it is not the condition of machining inner cavity angle cleaning, you may as well grind the chamfering greater than 0.2mm at the tool tip to increase the strength of the tool tip.

Grinding technology of main edge (side edge) of end mill

If the main edge of the end mill is worn, it is necessary to grind it along the spiral line on the grinding wheel (the diameter of the grinding wheel is smaller, better). However, there is usually taper after grinding. The smaller the taper, the higher the control level.

For the quality of processing, it depends on what factors, including many, may be the processing method, may also depend on the material, these are possible, automatic parts processing is the same, then the quality of automatic parts processing depends on what reason?

The quality of the machine depends on the processing quality of the parts and the assembly quality of the machine. The machining quality of the parts includes the machining accuracy and the surface quality of the parts. The machining accuracy refers to the degree to which the actual geometric parameters of the parts are consistent with the ideal geometric parameters. The difference between them is called machining error. The size of machining error reflects the level of machining accuracy. The larger the error is, the lower the machining accuracy is, the smaller the error is, the higher the machining accuracy is; the main factors affecting the machining accuracy are: dimensional accuracy, the conformity between the actual size of the part after processing and the tolerance zone center of the part size.

The machining error of Automatic Parts reflects the machining accuracy. The larger the error is, the lower the machining accuracy is, the smaller the error is, the higher the machining accuracy is; the main factors affecting the machining accuracy are: dimensional accuracy, the conformity between the actual size of the part after processing and the tolerance zone center of the part size. Compared with the method of producing parts with die casting die, it avoids the uneconomical of opening the die when manufacturing small batch parts, and shortens the production cycle greatly. At the same time, the correct clamping and positioning and reasonable processing technology make the processed parts have high precision and surface finish, which is not achieved by die casting process. Moreover, the density of extruded aluminum profile is higher than that of die casting. In addition, this method is different from the general single part machining production, it can batch produce a bed of parts. If the working table of the machine tool is large enough, the bottom plate can be made larger, and several aluminum materials can be arranged at a time, then the processing efficiency can be further improved and the number of tool changes is relatively reduced. If there are features on the side of the part to be processed, such as a round hole to be drilled, then after the part is cut off on the B side, the fixture shall be manufactured and the part shall be assembled for further processing

In a processing, there will be a variety of processes, these processes, are to make processing products, change better method, hardware processing is the same, it also has a variety of processes, so what are the surface treatment processes of hardware processing?

Hardware processing: surface processing can be divided into: Hardware spray painting processing, electroplating, surface polishing processing, metal corrosion processing and so on.

1. Spray paint processing: now the hardware factory in the production of large hardware products are used in the spray painting process, through the spray painting process to prevent the hardware from rusting, such as: daily necessities, electrical shell, handicrafts, etc.

Dongguan Hardware processing

1. Electroplating: electroplating is also the most extensive processing technology of hardware processing. Through modern technology, the appearance of hardware parts is electroplated to ensure that the product will not mildew and rust under long-term use. The common electroplating processes are: screws, stamping parts, batteries, car parts, accessories and so on.
2. Surface polishing processing: surface polishing processing is generally used in daily necessities for a long time. After surface burring treatment of hardware products, for example, we produce a comb, the comb is made of hardware by stamping, then the edge of the comb is very sharp, we have to polish the sharp part of the corner into a lubricating face, so in operation In the process of using, it will not cause harm to human body.

For operators, for their own processing things, we must know how to operate, but also know what the precautions are, so that it is useful for themselves, otherwise, when processing, there will be accidents, Dongguan CNC parts processing is the same, so what problems should be paid attention to in parts processing?

1. It is necessary to follow the safety operation regulations of machining center.
2. Wear protective equipment and cuff before operation. It is forbidden to wear scarf, gloves, tie and apron. The braid of female workers should be tied in the hat.
3. Check whether the tool compensation, zero point of machine tool and workpiece are correct before starting the machine.
4. The relative orientation of each button should meet the operation requirements. Carefully compile and input NC program.

CNC parts processing in Dongguan

1. Check the operation status of protection, insurance, signal, orientation, mechanical transmission part, electrical and hydraulic digital display system on the equipment, and carry out cutting under all normal conditions.
2. Before CNC machining of parts, the machine tool should be run in order to check the operation conditions of smooth, mechanical, electrical, hydraulic and digital display systems. Cutting can be carried out under all normal conditions.
3. After the machine tool enters the processing operation according to the program, the operator is forbidden to contact the workpiece, cutting tool and transmission part of the moving person, and it is forbidden to transfer or take things through the transmission part of the machine tool.
4. It is necessary to park the machine when adjusting the machine tool, clamping the workpiece and cutting tool and wiping the machine tool.
5. Things or other articles are not allowed to be placed on electrical appliances, operation cabinet and protective cover.
6. It is forbidden to remove iron filings directly by hand, and should be cleaned with special tools.

CNC parts processing in Dongguan

1. In case of abnormal conditions and alarm signals, park the vehicle immediately and ask relevant personnel to check.
2. It is forbidden to leave the operation post when the machine tool is running. If it is necessary to leave the machine tool for some reason, put the working table in the central position and return the cutter bar. It is necessary to park the vehicle and cut off the power supply of the main engine.

1. Accurate design drawings are required

It has just been said that precision hardware processing is to process some hardware parts with small diameter, so the design drawings of this product should be accurate, and the parts and components are far from accurate. If the drawings are not accurate, it may cause that the parts produced can not be used, thus increasing the production cost.

1. Raw materials for precision hardware processing

The products of precision hardware processing are usually used in aviation, clocks and other places with high requirements on raw material quality, so the requirements for the quality of processed hardware products are also quite high, so the high-quality raw materials are usually used in precision hardware processing.

1. Cost estimation

In many cases, the products of precision hardware processing are of relatively low value, so we should also study this point in the estimated time, which requires that the cost of precision hardware processing must be controlled. Improving production skills and increasing production efficiency play an important role in controlling capital.

Precision hardware processing is a high requirement for all aspects of the process, but as long as these concerns are achieved, it can still be done well under normal conditions.

1、 Basic machining route of shaft parts

The main machining situation of shaft parts is the general situation of outer circle and common special shape. Therefore, it is necessary to select the appropriate processing method for bucket force according to the requirements of various Accuracy grades and profile roughness. There are four basic processing routes.

First of all, it is the processing route from rough turning to semi finishing turning, and then to finishing turning, which is also the main process route for the pin cylindrical machining of shaft parts with common materials; The second is from rough turning to semi finishing turning, and then to rough grinding. For ferrous metal materials and parts with high accuracy requirements, general coarseness requirements are small and need to be hardened, this processing route is a good choice for bucket force, because grinding is an ideal subsequent processing procedure for bucket force; The three routes are from rough turning to semi finishing turning, then to finishing turning and diamond turning. This kind of processing route is specially used to process non-ferrous materials. Because the hardness of non-ferrous metals is small, it is easy to block the gap between sand grains. If grinding is used, it is not easy to obtain the required profile roughness, so finish turning and diamond turning must be adopted; The latter processing route is from rough turning to semi finishing turning, then to rough grinding, fine grinding and finishing. This route is often used for the parts which are hardened by ferrous metal and have high requirements for precision and low requirements for coarseness value.

2、 Pre machining of shaft parts

Before turning the outer circle of shaft parts, some preparatory procedures should be carried out, which is the pre machining process of shaft parts. Straightening is an important preparatory process. Because the workpiece blank in the manufacturing, transportation and storage process, often occurs bending deformation. In order to ensure reliable clamping and uniform distribution of machining allowance, straightening is carried out by various presses or straightening machines in cold state.

3、 Positioning datum for machining shaft parts

First of all, the center hole of the workpiece is used as the positioning reference for machining. In the machining of shaft parts, the general situation of each outer circle, the coaxiality of taper hole and thread profile, and the verticality of the end facing torsion axis are all important appearance of position accuracy. These profiles are generally based on the center line of the shaft as the design basis, positioning with the center hole, and the principle of appropriate datum coincidence. The center hole is not only the positioning datum in turning, but also the locating datum and grinding datum of other machining processes. When two center holes are used for positioning, multiple outer circles and end faces can be machined in one clamping process.

Secondly, the outer circle and the center hole are used as the positioning datum. This method effectively overcomes the error and fallacy of poor rigidity of the central hole positioning, especially when machining heavy workpieces, the positioning of the central hole will cause unstable clamping and the cutting parameters can not be too large. If the outer circle and the center hole are used as the positioning datum, there is no need to worry about this problem. In rough machining, the general situation of the shaft’s outer circle and a central hole are used as the positioning reference, which can bear a large cutting torque in the machining, which is a common positioning method for shaft parts.

The third is to take the general situation of two outer circles as the positioning datum of machining. When machining the inner hole of the hollow shaft, the center hole can not be used as the positioning reference, so the general situation of the two outer circles of the shaft should be used as the positioning reference. When machining machine tool spindle, two supporting journal is often used as positioning reference, which can effectively ensure the coaxiality requirement of taper hole relative to supporting journal, and eliminate the error caused by the non coincidence of datum.

The cone plug with a central hole is used as the positioning reference for machining. This method is widely used in the processing of hollow shaft cylindrical profile.

4、 Clamping of shaft parts

The machining of cone plug and cone sleeve mandrel must have high machining accuracy. The center hole is not only the positioning reference for manufacturing itself, but also the datum for finishing the outer circle of hollow shaft. It is necessary to ensure that there is a high coaxiality between the cone surface and the central hole on the cone plug or cone sleeve mandrel. Therefore, when selecting the clamping mode, attention should be paid to reduce the installation times of the cone plug as far as possible, so as to reduce the repeated installation error of the parts. In actual production, the cone plug installation in the future, generally speaking, before the completion of processing, will not be removed or replaced in the middle of processing