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| CNC lathe technology and equipment | CNC lathe machining process and ordinary lathe machining process of the similar, but due to the nc lathe is a continuous automatic processing clamping, finish machining process, thus all should pay attention to the following aspects:
A rational choice, cutting dosages
For high efficiency of metal machining, processed materials, cutting tools, cutting conditions are the three elements. These determines the processing time, the tool life and processing quality. Economic and effective processing method is rational choice cutting conditions.
Cutting conditions of three elements: the cutting speed, feed and cutting depth directly cause damage to the tool. With the speed of cutting point temperature rises, and can produce the mechanical, chemical, thermal wear. Cutting speed increased by 20%, the tool life can reduce 1 1/2.
Feed conditions and tool wear relations in tiny behind the range. But the feeding, cutting temperature rises, wear. It is the influence of knives cutting speed. The influence of cutter cut deep, though no cutting speed and feed, but in small cut deep cut by cutting materials, hardening layer, also affects the tool life.
According to the users of the materials, hardness, cutting, material, feeding, cutting depth of the cutting speed selection use.
The most suitable processing conditions in these factors are selected based on selected. There are rules, stable wear life ideal condition to.
However, in the actual operation, the tool life choices and tool wear and processing dimensional change, surface quality and cutting noise, etc. Heat processing In determining the processing condition, according to the actual situation of the need for research. For stainless steel and heat-resistant alloy difficult-to-machine materials, can use the coolant or choose rigid good blade.
Second, the reasonable selection tool
1, rough, should choose high strength, good durability, rough cutting back on optimizing and feed requirements.
2, car, should choose high accuracy, good durability tool, in order to ensure the accuracy of the processing.
3, in order to reduce the time and convenient to change knife knife, should try to use machines clip clip blade knife and machine.
Third, the rational choice fixture
1, try to choose general fixture clamping work-piece, avoid using special jig,
2 the locating datum, parts, in order to reduce the error of orientation.
Fourth, determine the processing line
Processing route is controlled machining process, tools and relative parts trajectory direction.
1, should guarantee machining precision and surface roughness requirements,
2, should try to shorten processing route, reduce air travel time tool.
Five, processing route limits.but contact with
At present, in CNC lathe is not to popularize the use of general conditions, the blank of the excessive be surplus, especially contains forging, casting hard cortical surplus arrangement in ordinary lathe machining. If must use nc lathe machining, should pay attention to the flexible program.
Six, fixtures setup points
Currently hydraulic chuck and hydraulic clamping cylinder connections are realized by bars, as shown in figure 1. Hydraulic clamping chuck are as follows: first use unimportant point move hand off on the hydraulic cylinder, nuts, and from the spindle u-shaped backend out, and then move hand can be unloaded chuck screw, unload chuck.
The light on the cutting edge cutting edge is behind the direction of landform vice grinding with a blade tip of parallel, mainly used for cutting edge after cutting, equivalent to a second place burr, etc, finishing process, the purpose of which is to improve the scars of surface roughness of workpiece. Many applications in handing the precision tools.
This article reprinted http://www.dgybl.com from (the), |
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