Category Archive Machinery industry

The requirements of hardware processing are very high. Although we often carry out the processing work, we have to meet the standards for the quality of products and their own safety and work efficiency. So today, we will learn what things must be done in the hardware processing?

1、 All employees should check whether their clothes meet the work requirements before entering the work. 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.

4、 Only when all other personnel leave the mechanical working area and take away the sundries on the worktable, can the power supply be started to start the machine.

5、 After the machine is started, one person will transport materials and operate the machine. Other people are not allowed to press the electric building or step on the pedal 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

Corn milling cutter is suitable for cutting this kind of brittle plastic, and the cross section is very flat.

A milling cutter is a rotary cutter with one or more teeth for milling. When working, the cutter teeth cut off the allowance of the workpiece intermittently in sequence. Milling cutter is mainly used for machining plane, step, groove, forming surface and cutting workpiece on milling machine.

Cylindrical milling cutter

It is used for machining plane on horizontal milling machine. The cutter teeth are scattered on the circumference of the milling cutter, and can be divided into straight teeth and spiral teeth according to the tooth shape. According to the number of teeth, it can be divided into coarse teeth and fine teeth. Spiral tooth rough tooth milling cutter has less teeth, high tooth strength and large chip holding space, which is suitable for rough machining; fine tooth milling cutter is suitable for finishing.

Face milling cutter

Also known as disk milling cutter, it is used for machining plane on vertical milling machine, end milling machine or gantry milling machine. There are cutter teeth on the end face and circumference, and there are coarse teeth and fine teeth. There are three kinds of structures: integral, inlaid and indexable.

end mill

It is used for machining groove and step surface. The cutter teeth are on the circumference and end face, and can not feed along the axial direction. When the end mill has end teeth passing through the center, it can be fed axially.

Three side edge milling cutter

It is used for machining various grooves and step surfaces, with cutter teeth on both sides and circumference.

Angle milling cutter

There are two kinds of single angle milling cutter and double angle milling cutter for milling groove with definite angle.

Saw blade milling cutter

It is used for machining deep groove and cutting workpiece. There are many cutter teeth on its circumference. In order to reduce the conflict during milling, there is a 15 ′ ~ 1 ° offset angle on both sides of the cutter teeth. For the rest, there are keyway milling cutter, dovetail groove milling cutter, T-groove milling cutter and various form milling cutter.

T-shaped milling cutter

It is used for milling T-groove.

Process specification is a technical document to guide construction. It generally includes the following contents: process route of parts processing, specific processing contents of each process, cutting amount, man hour quota and equipment and process equipment adopted. So what are the functions of machining process specification?

1. Process specification is the main technical document to guide production

The production planning and scheduling of machining workshop, the operation of workers, the quality inspection of parts processing, and the accounting of processing cost are all based on the technological procedures. Processing problems in production are often based on the process specification. In case of handling quality accident, the responsibilities of relevant units and personnel shall be determined according to the process specification.

1. Process specification is the main basis of production preparation

When the workshop wants to produce a new part, it is necessary to formulate the machining process specification of the part first, and then prepare for production according to the process specification. For example: the analysis and research of key processes in the processing technology of new parts; the preparation of necessary knives, clamps and measuring tools (purchased or self-made); the purchase or manufacturing of raw materials and blanks; the purchase of new equipment or the modification of old equipment, etc., must be carried out according to the process.

1. Process specification is the basic technical document of the newly-built Machinery Factory (workshop)

When building (rebuilding and expanding) a batch or large-scale machining workshop (section), the type and quantity of machine tools required and the layout in the workshop shall be determined according to the process specification, and then the area size, power and hoisting equipment configuration of the workshop as well as the type of work, technical level and quantity of workers required shall be determined.

Fine hardware processing is widely used in our life, so what are the advantages of fine hardware processing? Let’s have a simple understanding:

1. CNC machining precision of fine hardware axis is high, with stable processing quality;
2. Multi coordinate linkage can be carried out, and parts with disordered shapes can be processed;
3. When the CNC machining parts of fine hardware are changed, only the NC program needs to be changed, which can save the production preparation time;
4. The machine tool itself has high precision and rigidity, and it can choose favorable processing amount and high productivity (generally 3 to 5 times of ordinary machine tool);
5. The machine tool automation degree is high, can reduce the labor intensity.

The above is the advantage of fine hardware processing, hope to help you.

What should we pay attention to when processing fine parts

1. The number of working procedures of fine stamping parts mainly depends on the complexity of its structure and shape, and is determined by the number of tortuous angles, relative orientation and tortuous direction. When the zigzag radius of the zigzag part is less than the allowable value, a shaping process is added after the zigzag.
2. The process quantity of fine stamping parts is related to the data nature, drawing height, drawing steps, drawing diameter, data thickness and other conditions, which can only be determined by drawing process calculation. When the fillet radius of the drawing part is small or the scale precision is required to be high, a shaping process should be added after the drawing.
3. The determination of the number of processes should also be in line with the existing mold making ability and stamping equipment. Mold making ability should be able to ensure the mold processing, installation accuracy of the corresponding progress requirements. Otherwise, you can only add the number of operations.
4. When the cross-section quality and dimension precision of fine stamping parts are required to be high, it can be considered to add finishing process after blanking process, or select fine blanking process directly.
5. In order to improve the stability of fine stamping process, it is sometimes necessary to add process number to ensure the quality of fine stamping parts. For example, the additional positioning technology hole punching of zigzag parts, the addition of deformation in the forming process to reduce the hole blanking to transfer the deformation area and so on.
6. The blanking of fine stamping parts with simple shape is completed by single process die. Because the structure or strength of the die is limited, the inner and outer parts of blanking should be divided into several parts, and multiple stamping processes should be selected.
7. Special stamping oil should be selected for fine stamping. Rapeseed oil, machine oil, recycled oil and other non special oil products do not contain additives suitable for stamping processing, which will lead to quality problems such as reduced precision of workpiece, burr of burr edge and surface hole damage. And the chemical substances in non-specific oil products will form rust on the machine, yellow robe, and skin allergy of workers.

The above is the need to pay attention to the fine parts processing, I hope to help you

The operation of machinery is very important. If there is a wrong step in the operation, the consequences may directly affect the quality of the product. These are not what we want, so we must follow the steps in the operation. Let’s learn about the specific steps of machining?

1. Finishing: this processing principle is roughly some grinding and polishing, which is usually carried out after the product has completed the structure.
2. Face before hole: in the process of precision mechanical parts, for the workpiece such as bracket, it is necessary to carry out both plane processing and mechanical hole processing. In order to make the accuracy error of the hole processed smaller, machining the plane before processing the hole is conducive to reducing the error.
3. Dividing the processing stage: when the product is in the precision mechanical parts, the processing degree needs to be divided according to different product requirements. If the accuracy requirement is not high, then a simple rough machining stage is OK. The product schedule requirements are more and more strict, the follow-up will be semi finishing and finishing stage.
4. Datum first: when using mechanical equipment to process products, a datum plane must be determined, so that there can be a positioning reference in the subsequent processing. After the datum plane is determined, the datum plane must be processed first. In precision mechanical parts, there will be a lot of workpieces are not produced by one-time production, but when the workpiece is produced, it is just a rough model.

Perhaps many people think that in the hardware processing is the same, as long as the hardware parts processing is the same method. If you think so, it’s wrong. The surface processing of hardware needs to be divided more carefully. Generally, it can be divided into: metal painting processing, electroplating, surface polishing, metal corrosion processing, etc. today, the hardware processing editor will give you a general explanation.

1. Spray paint processing: hardware factory in the production of large hardware products are used in spray painting processing, through the painting process to avoid hardware rust, such as: daily necessities, electrical shell, handicrafts and so on
2. Electroplating: electroplating is also the most common processing technology of hardware processing. Through modern technology, the surface of hardware parts can be electroplated to ensure that the products will not mildew and rust for a long time. The common electroplating processing methods include screws, stamping parts, batteries, turning parts, accessories, etc,
3. Surface polishing processing: surface polishing is generally used in daily necessities for a long time. Through the surface burr treatment of hardware products, for example, we produce a comb. The comb is made of hardware by stamping. Then the edges and corners of the comb are very sharp. We have to polish the sharp parts of the edges and corners into a smooth face, so that in the process of use No harm to human body.

The precision of hardware parts almost determines the quality of the products. The more careful the hardware parts are, the higher the accuracy requirements will be. So what are the reasons for the drop of precision? Let’s have a simple understanding below:

One factor is the poor machining accuracy of the parts themselves. Generally speaking, if the dynamic deviation between shafts is not adjusted well during installation, it may also be because the shaft drive chain changes due to wear, which will affect the accuracy of the parts. Generally speaking, it is advisable to adjust the compensation amount from the beginning in order to check the accuracy caused by the deviation of this variety. If the deviation is too large and even if an alarm occurs, it is necessary to check the servo motor to see if its speed is too high.

The two factors are that the overshoot during the operation of the machine tool will also affect the processing accuracy. It is possible that the acceleration and deceleration time is too short, and the appropriate lengthening of the transition time. Of course, it is also very likely that the link between the lead screw and the servo motor is loose.

The three factors are the roundness out of tolerance caused by the linkage of the two shafts, the axial deformation of the circle caused by the mechanical failure, the compensation error of the screw clearance of the shaft, or the deviation of the shaft positioning, which may affect the precision of the detailed parts.

The above is the cause of precision drop, I hope to help you

In order to ensure the quality of the product, we need to be careful in the operation to reduce the probability of error. Therefore, there are many matters needing attention when operating. But many new users don’t know what matters should be paid attention to when operating. What are the precautions for machining?

1. The clamping method of mechanical parts processing should reasonably choose the positioning datum and clamping scheme

When setting our benchmark, we should follow the two principles of “benchmark unification” and “benchmark coincidence”.

1. In large-scale machining, all surface processing should be completed in one positioning and clamping as far as possible. Therefore, it is necessary to select a positioning method that is easy to process all surfaces of the workpiece.
2. When determining the position of the workpiece on the worktable, we must consider the influence of the processing of each position, the length of the tool and the stiffness of the tool on the machining quality.
3. The fixture used in machining should be assembled by common parts and can be adjusted as far as possible, which can effectively shorten the production preparation cycle.

Problems needing attention in arranging large machining sequence

(1) In order to arrange the machining sequence, we must follow the basic principles of “surface before hole” and “rough first and then fine”.

(2) Determine the tool point and tool change point, once determined, not suitable for replacement.

(3) According to the centralized process of cutting tools, the same tool can be avoided to be reused, and the times and time of tool replacement can be reduced.

(4) For the hole system with very high coaxiality requirement, the hole system in other coordinate positions should be processed after the completion of all the processing of the hole system after one positioning, which can effectively eliminate the error caused by repeated positioning and improve the coaxiality of the hole system.

Hardware products are very common in our life and often need to be used. But I believe you are not familiar with the word of hardware processing, and even more unfamiliar with this process. Because usually in life contact is the finished product, we do not know the process, so the following small series to take you to understand what matters need to pay attention to in the hardware processing?

1、 The design of drawings should be precise, detailed and accurate

Some of our drawings are provided by our customers, and some are designed by ourselves. After the design is completed, we should print a complete set of drawings and check them carefully. It is better to use 3D design software to complete assembly once and check the size of each part.

2、 The compilation of the detailed list should be fully consistent with the actual situation

The preparation of detailed list is a meticulous work. Every spare part should be checked carefully, and it should be compared with the model plate and drawing on site. There should be no mistakes, omissions or more.

3、 Die acceptance can not be sloppy

Mold acceptance is a highly professional work, product developers, mold designers, mold manufacturing personnel should participate in it, mold material, part size, mold structure rationality, life are very important indicators.

4、 Problems should be found in product trial assembly and sample production

The purpose of product trial assembly is to find out the problems, record the problems and solve them one by one.

5、 The product code should be checked carefully

Product tagging is the most error prone place, we also have many lessons in this respect. The name, quantity, material and technical requirements of parts and components are very important data. If a certain data is wrong, it will cause great economic losses to the enterprise. Especially for the loan parts, the product tagging personnel, developers and technicians must check carefully.

The above points are in the hardware processing need to pay attention to the matters, want to learn more information, welcome to visit our website