Generally pay attention to the following points: tool wear, elastic deformation of the workpiece, processing technology, processing sequence, tool adjustment, tool compensation change, machine tool clearance status , tightening method, etc.
1. CNC lathe processing optimization parameters, balance the tool load and reduce tool wear. Due to the differences in their own geometric shapes, there are large differences in rigidity and strength between different cutting tools, for example between a straight cylindrical cutter and a cutting cutter, and between a straight cylindrical cutter and an inverted cylindrical cutter . If these differences are not taken into account during programming. Using a tool with low strength and rigidity to support a large cutting load will cause abnormal wear and even damage of the tool, and the processing quality of the parts will not meet the requirements. Therefore, the workpiece structure must be analyzed during programming to reduce the number of sharpening times and tool replacements.
2. The processing technology of CNC lathe is similar to that of ordinary lathe. However, since the CNC lathe is clamped once and performs all turning processes continuously and automatically, the following aspects must be considered:
(1) Choose the cutting quantity reasonably.
For high-efficiency metal cutting, the material to be processed, cutting tools and cutting conditions are the three main elements. These determine the machining time, tool life and machining quality.
The three elements of cutting conditions: cutting speed, feed and cutting depth directly cause damage to the tool. As the cutting speed increases, the temperature of the tool tip increases, causing mechanical, chemical and thermal wear. If the cutting speed is increased by 20%, the tool life will be reduced by 1/2.
The relationship between feed conditions and reverse tool wear is in a very small range. It has less impact on the tool than the cutting speed. Although the impact of cutting depth on the tool is not as great as that of cutting speed and feed, when cutting with a small cutting depth, the cut material will produce a hardened layer , which will also affect the tool life. .
The user should choose the cutting speed according to the material to be processed, hardness, cutting condition, material type, feed amount, cutting depth, etc. The most suitable processing conditions are selected based on these factors. However, in actual operations, the choice of tool life is related to tool wear, changes in machined dimensions, surface quality, cutting noise, heat treatment, etc. For difficult-to-machine materials like stainless steel and heat-resistant alloys, you can use coolant or choose a rigid blade.
(2) Choose tools reasonably.
(a) When rough turning, you should choose tools with high strength and durability to meet the requirements of large back cut and large feed during rough turning; (b) When finishing turning, you should choose tools with high precision and durability. good tools to ensure machining precision requirements; (c) In order to reduce tool change time and facilitate tool adjustment, machine-clamped tools and blades should be used wherever possible (d) Try to use universal clamping devices; workpieces and avoid using special accessories.
(3) Determine the treatment route.
Machining route refers to the path and direction of movement of the tool relative to the workpiece during the machining process of the index control machine tool.
(a) Processing precision and surface roughness requirements must be guaranteed; (b) The processing route should be shortened as much as possible to reduce tool idle time; (c) The relationship between the processing route and the machining allowance;
At present, because CNC lathes are not yet widely used, the excess margin on the blank, especially the margin containing forged and cast hard layers, should generally be processed on ordinary lathes. If it is necessary to use a CNC lathe for machining, you should pay attention to the flexible layout of the program.
(d) Key points for device installation At present, the connection between the hydraulic chuck and the hydraulic clamping cylinder is made by a tie rod. The key points for tightening the hydraulic chuck are as follows: First, use a wrench to remove the. nut on the hydraulic cylinder, remove the draw pipe and remove it from the hydraulic chuck. Remove the rear end of the spindle, then use a handle to remove the chuck retaining screws to remove the chuck. The tool wiper edge refers to a small section of the blade that is ground parallel to the tool tip in the direction of the secondary deflection angle behind the tool blade. It is mainly used for primary cutting and secondary cutting after cutting. The blade. This is equivalent to the finishing process to remove burrs and other scars. Improving workpiece surface roughness is mainly used on finishing tools.
Daguang focuses on providing solutions such as precision CNC machining services (3-axis, 4-axis, 5-axis machining), CNC milling, 3D printing and rapid prototyping services.
