Common problems with non-standard tool processes

First, if it is a size problem, you can choose a standard tool with a size similar to the required size, which can be solved by grinding, but also need to pay attention to two points:

1), the size difference can not be too large, generally not more than 2mm, because the size difference is too large, will cause the cutter groove shape change, directly affect the chip tolerance space and geometric Angle.

2), if the end milling cutter with blade hole can be changed on the ordinary machine tool, the cost is low, if it is not keyway milling cutter with blade hole can not be carried out on the ordinary machine tool, the need to change the grinding on the special five-axis machine tool, the cost will be higher.

3) If the surface roughness is a problem, it can be realized by changing the geometric Angle of the edge, such as increasing the degree of the front and rear angles will significantly improve the surface roughness of the workpiece. But if the user's machine tool is not rigid enough, the edge may be blunt but can improve the surface roughness, which is very complex, need to analyze the processing site to reach a conclusion.

4), machining process often encounter some difficult to process with standard tools, therefore, the production of non-standard tools for mechanical cutting is very important. Because the use of non-standard cutting tools in metal cutting is more common in milling processing, so the milling processing of non-standard cutting tools to make a little introduction.

5), due to the production of standard tools is for very large amount of ordinary metal or non-metal parts cutting, overheating processing when the workpiece and hardness increases, or artifacts such as stainless steel is very easy to stick a knife, there are also some the surface shape of the workpiece is complex, or by processing the situation such as the roughness of the surface have higher requirements, standard tools cannot meet the needs of processing. So in the process of processing, the material of the tool, the geometric shape of the knife edge, geometric Angle, etc., targeted design, can be divided into two categories that do not need to be customized and need to be customized. Tools that do not need to be customized are mainly used to solve two problems, such as size and surface roughness.

Two, customized non-standard tool problems:

1) the workpiece is processed with special shape requirements, such as lengthening the tool needed for processing, adding the end tooth inverted R, or special cone Angle requirements, handle structure requirements, blade length size control and so on. This kind of tool if the shape requirements are not very complex, in fact, it is easy to solve, the only need to pay attention to non standard tool processing is more difficult, therefore, the user in the case of being able to meet the use of processing, should not be too high precision pursuit. Because, high precision itself means high cost and high risk, will cause unnecessary waste to the production capacity of the producer and its own cost.

2), the workpiece is processed with special strength and hardness, such as workpiece overheating treatment, high strength and hardness, the general tool material can not be machined, or stick knife fierce, this is, you need to put forward special requirements for the material of the tool. The general solution is to choose high-grade tool materials, such as cobalt containing high-speed rigid cutting tool has a higher hardness to cut the workpiece material, with high quality carbide material tool can be processed high hard material, and even can be milling instead of grinding. Of course, there are some special cases, such as in the aluminum processing, there is a called superhard cutting tools on the market is not necessarily appropriate, although the general soft aluminum, can be said to be a kind of easy processing products, but superhard cutting tool adopted by the material is a kind of aluminium high speed steel, the material is harder than ordinary HSS do some, But in the processing of aluminum will cause affinity between aluminum elements, so that the tool will increase wear, at this time, if you want to get high efficiency, you can choose cobalt high speed steel instead.

3), the workpiece to be processed has special chip tolerance and chip removal requirements, then you should choose fewer teeth and deeper chip tolerance groove, but this design can only be for easy processing of materials, such as aluminum alloy.