Yearly Archive September 14, 2020

If you want to do a good job, there must be many factors that need to be considered. It is very important for us to ensure the efficiency of work and the quality of products. But in the process of our work, there must be some factors that we can’t control, so this will lead to problems in the work, so let’s understand what factors should be paid attention to in the surface processing of CNC machining parts

1. There is a large range of machining accuracy and surface roughness that any CNC machining method can obtain, but only in a narrow range is economical, and the machining accuracy in this range is economic. Therefore, when selecting the processing method, we should choose the corresponding processing method which can obtain the economic machining accuracy.
2. The properties of CNC machining parts should be considered.
3. The structural shape and size of CNC machining parts should be considered.
4. Productivity and economic requirements should be considered. In mass production, advanced technology with high efficiency should be adopted. Even can fundamentally change the manufacturing method of the blank, can reduce the amount of mechanical processing labor.

CNC processing is a relatively complex work, which requires professionals to operate. It is not allowed to work without professional training. So many teachers said that because the processing steps are too complex, sometimes a lot of time will be wasted, so they studied some time-saving skills. Now we will learn how to make five Axis CNC machining become a simple way!

CNC processing in Dongguan

(1) Area to be processed and processing sequence. This step is based on the complexity of the component shape, and is often the most easily inspired by skilled mechanics.

(2) What shape should the tool path have in the machining area? Should the tool be allowed to cut in front of back or up and down according to the parameterized lines of the surface, and the surface boundary should be used as a guide?

(3) How to guide the tool axis to match the tool path is very important for the quality of surface finish and the use of short hard tools in narrow spaces. Mold manufacturers need to have adequate control of the tool, including the rake angle when the tool is tilted. In addition, many turrets must be considered when turning the turret. For example, there is a limit to the degree of rotation of milling / turning machines.

(4) How to change the cutting path of the tool? How to control the displacement of the tool due to reset or generated by the tool at the starting point of the tool path and the displacement that the tool must produce between the processing areas? The displacement generated by the conversion process is very important in the mold production, which can eliminate the evidence line and the trace generated by the tool (it can be removed by manual polishing afterwards).

CNC, also known as computer gong, cncch or CNC machine tool, is actually a kind of name in Hong Kong. Later, it was introduced into the Pearl River Delta of mainland China. It is actually a CNC milling machine. In Guangzhou, Jiangsu, Zhejiang and Shanghai, there is a new type of machining skill called “CNC machining center”. It is a new type of processing skill. The primary task is to compile the processing program, that is, to convert the original handicraft into computer programming. Of course, you need to have the experience of craft processing.

The disadvantage of NC machining is the high cost of machine tools and equipment, which requires high level of repair personnel.

CNC, also known as processing center, has a wide range of applications, not limited to furniture production. Therefore, the summary of CNC use experience in various industries is worth learning. The following points are summarized:

1. The speed of white steel knife is not too fast.
2. Copper roughing less white steel knife, more use flying knife or alloy knife.
3. When the workpiece is too high, it should be sliced with different length of knife.
4. After roughening with a big knife, use a small knife to remove the remaining material to ensure that the surplus is common.
5. The plane is processed with flat bottom cutter and less ball cutter, so as to reduce the processing time.

CNC machining

1. When the copper worker cleans the angle, first check the size of R on the angle, and then determine how large the ball knife is used.
2. The four corners of the calibration plane should be smooth.
3. If the slope is an integer, use the slope cutter to process, such as pipe position.
4. Before each process, think about the remaining allowance after the previous process to prevent the tool from being empty or excessive.
5. Try to take simple knife path, such as shape, grooving, single side, less winding, etc.
6. When taking wcut, if you can walk finish, don’t go rough.
7. When the shape of the light knife is smooth, first rough and then fine. When the workpiece is too high, polish the edge first and then the bottom.
8. Reasonably set up the public service to balance the machining accuracy and computer calculation time. For roughing, the service is set to 1 / 5 of the allowance, while for the light knife, it is set to 0.01.
9. Do more procedures and cut down the idle time. Think more and cut down on mistakes. Do a little more auxiliary line, auxiliary surface, improve the processing situation.

With the advent of the industrial 2.0 era, China’s manufacturing industry is generally growing, and the requirements for the processing and manufacturing industry are higher. Taking the aluminum parts processing and manufacturing industry as an example, the CNC machining accuracy of aluminum alloy is more stringent. However, this is also the trend of the times. It is obvious that aluminum parts are widely used in high-precision instruments. Now we talk about the matters needing attention in CNC machining of aluminum alloy.

1. The speed of white steel knife should not be too fast.
2. When the workpiece is too high, please thicken it with a knife of different grade length.
3. After roughening with a rough knife, remove the excess with the knife, and grind the knife after ensuring the excess.
4. The plane is processed with flat bottom edge instead of ball edge to reduce processing time.
5. The four corners of the calibration plane must be flat.
6. The inclination is an integer, which is processed with an inclined cutter, such as tube position.
7. Before each work, want to clear the remaining amount of the previous work after processing, to avoid empty tool and redundant processing.
8. Try to take a simple path. For example, shape, trenching, avoiding single side, lapping, etc.
9. When taking wcut, if you can go to finish, please don’t take rough.
10. In the case of shape light knife, the light should be coarsened first and then exposed. When the workpiece is too high, it should be illuminated first and then.
11. The tolerance should be set reasonably to balance the machining accuracy and computer calculation time. The tolerance is set to 1 / 5 of the remaining value when it is turned on, and 0.01 for a light knife.
12. Add more projects to reduce the time of empty knife. Think more and reduce the chances of mistakes. Increase the auxiliary surface of the auxiliary line slightly to improve the processing condition.

In the process of production problems are also common things, because the friction between parts will certainly affect our work, so we must pay attention to methods in operation to avoid some unnecessary problems, so we will learn about the common problems of CNC machining?

CNC processing in Dongguan

1、 Workpiece over cutting:

reason:

1. The tool strength is not too long or too small, resulting in the tool bouncing.
2. Improper operator operation.
3. The cutting allowance is not uniform. (e.g. 0.5 for side of curved surface and 0.15 for bottom surface)
4. Improper cutting parameters (such as too large tolerance, too fast SF setting, etc.).

improve:

1. The principle of using knife: it can be big or small, short or not long.
2. Add corner clearance procedure, and the allowance should be uniform as far as possible (the allowance of side and bottom should be consistent).
3. Reasonable adjustment of cutting parameters, large margin corner rounding.
4. Using the SF function of the machine tool, the operator can adjust the speed to achieve the best cutting effect.

2、 The problem of the division is as follows:

reason:

1. Operator manual operation is not accurate.
2. There are burrs around the mold.
3. There is magnetism in the center rod.
4. The four sides of the mold are not vertical.

improve:

1. The manual operation should be checked carefully repeatedly, and the points should be at the same height as far as possible.
2. Deburring the periphery of the mould with an oilstone or file, wipe it with rags, and finally confirm it by hand.
3. Demagnetize the center bar before parting the mold (ceramic bar or others can be used).
4. Check whether the four sides of the mould are vertical by checking the table. (the scheme should be reviewed with the fitter if the perpendicularity error is large)

1. A large number of cutting tooling, processing parts with disordered shapes do not need messy tooling. If you want to change the shape and scale of parts, you only need to modify the part processing program, which is suitable for new product development and modification.
2. The machining quality is stable, the machining precision is high, and the repetition precision is high.
3. In the case of multi type and small batch production, the production power is higher, the time of production preparation, machine tool adjustment and process inspection can be reduced, and the cutting time can be reduced by using the optimal cutting amount.
4. It can machine the disordered surface which is difficult to machine by conventional method, and even can process some parts which cannot be observed.

The defect of NC machining is the high cost of machine tools, which requires high level of repair personnel.

CNC, also known as processing center, has a wide range of applications, not limited to furniture production. Therefore, the experience summary of CNC application in various industries is worth learning. The following points are summarized:

1. The speed of white steel knife should not be too fast.
2. Copper roughing less white steel knife, more use flying knife or alloy knife.

CNC machining

1. When the workpiece is too high, it should be sliced with different length of knife.
2. After roughening with a large knife, use a small knife to remove the remaining material, and smooth the knife only after ensuring the same allowance.
3. The plane is processed with flat bottom cutter and less ball cutter, so as to reduce the processing time.
4. When the copper worker cleans the angle, first check the R size on the angle, and then determine how large the ball knife is used.
5. The four corners of the calibration plane should be smooth.
6. If the slope is an integer, use the slope cutter to process, such as pipe position.
7. Before each process, think about the remaining allowance after the previous process to prevent the tool from being empty or excessive.
8. Try to take simple cutting path, such as shape, grooving, single side, less walking around the same height.
9. When taking wcut, if you can walk finish, don’t go rough.
10. When the shape of the light knife is smooth, first rough and then fine. When the workpiece is too high, polish the edge first and then the bottom.
11. Set tolerance reasonably to balance machining accuracy and computer calculation time. The tolerance is set to 1 / 5 of the allowance for roughening and 0.01 for smooth knife.
12. Do more procedures and cut down the idle time. Think more and cut down on mistakes. Make more auxiliary lines and auxiliary surfaces to improve the processing conditions.

1. A large number of cutting tooling, processing parts with disordered shapes do not need messy tooling. If you want to change the shape and scale of parts, you only need to modify the part processing program, which is suitable for new product development and modification.
2. The machining quality is stable, the machining precision is high, and the repetition precision is high.
3. In the case of multi type and small batch production, the production power is higher, the time of production preparation, machine tool adjustment and process inspection can be reduced, and the cutting time can be reduced by using the optimal cutting amount.
4. It can machine the disordered surface which is difficult to machine by conventional method, and even can process some parts which cannot be observed.

The defect of NC machining is the high cost of machine tools, which requires high level of repair personnel.

CNC, also known as processing center, has a wide range of applications, not limited to furniture production. Therefore, the experience summary of CNC application in various industries is worth learning. The following points are summarized:

1. The speed of white steel knife should not be too fast.
2. Copper roughing less white steel knife, more use flying knife or alloy knife.

CNC machining

1. When the workpiece is too high, it should be sliced with different length of knife.
2. After roughening with a large knife, use a small knife to remove the remaining material, and smooth the knife only after ensuring the same allowance.
3. The plane is processed with flat bottom cutter and less ball cutter, so as to reduce the processing time.
4. When the copper worker cleans the angle, first check the R size on the angle, and then determine how large the ball knife is used.
5. The four corners of the calibration plane should be smooth.
6. If the slope is an integer, use the slope cutter to process, such as pipe position.
7. Before each process, think about the remaining allowance after the previous process to prevent the tool from being empty or excessive.
8. Try to take simple cutting path, such as shape, grooving, single side, less walking around the same height.
9. When taking wcut, if you can walk finish, don’t go rough.
10. When the shape of the light knife is smooth, first rough and then fine. When the workpiece is too high, polish the edge first and then the bottom.
11. Set tolerance reasonably to balance machining accuracy and computer calculation time. The tolerance is set to 1 / 5 of the allowance for roughening and 0.01 for smooth knife.
12. Do more procedures and cut down the idle time. Think more and cut down on mistakes. Make more auxiliary lines and auxiliary surfaces to improve the processing conditions.