Fixture selection

9 1月 2018 | 没有评论 | posted by admin | in Article

There are two main requirements of CNC machining fixture: First, the fixture should have sufficient accuracy and rigidity; Second, the fixture should have a reliable positioning benchmark. When choosing fixtures, usually consider the following points:

1) try to use adjustable fixtures, combination fixtures and other common fixtures, to avoid the use of special fixtures to shorten the production preparation time.

2) Only consider the use of special fixtures in mass production, and strive to simple structure.

3) Loading and unloading work pieces should be quick and easy to reduce machine downtime.

4) The fixture should be installed on the machine accurately and reliably to ensure that the workpiece is processed in the correct position.

The characteristics of aluminum are as follows

8 1月 2018 | 没有评论 | posted by admin | in Article

Relative to the steel and high temperature alloys, it is a soft metal, HRC hardness is not high, but it is more resilient. So relative to the phase of the tool, the higher soft metal if the use of high hardness tungsten steel cutter to cut, will make the blade broken, and the tool life is very short. It requires the hardness is not high, and do not stick knife high-quality tools to complete the processing, the knife can only be done in order to improve the speed of the machine, in order to improve efficiency.
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1: suitable for processing materials: aluminum and aluminum, aluminum, die-casting aluminum, aluminum, copper alloy, magnesium alloy, zinc alloy.
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2: effectively remove the product around the burr, Beryllium front problems, with good processing quality.
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3: The use of high-rigidity body design can suppress chatter, the workpiece surface accuracy, good gloss.
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4: Unique edge groove design, is conducive to the excretion of iron filings, so that light aluminum table without burrs.
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5: negative front corner of the blade, can minimize the tip chipping.

Finishing of hardened parts (hardness HRC55 and above) is usually done by grinding. However, with the development of cutting tool materials and the improvement of machining accuracy of lathes (especially CNC lathes), hard parts are used instead of grinding to complete parts The final processing has become a new way of finishing, this process of grinding on behalf of the car has the following advantages:

5 1月 2018 | 没有评论 | posted by admin | in Article

(1) The processing flexibility can be improved, the grinding wheel grinding limit has been exceeded, and the workpieces with different geometric shapes can be processed by changing the cutting edge and the way of cutting.

(2) The environmental problems in cutting process are becoming more and more serious. The waste liquid and waste generated by grinding process are more and more difficult to handle and remove, and are harmful to the human body. However, it is of great significance for hard cutting not to add coolant.

(3) high cutting efficiency, short processing time, small equipment investment costs, can reduce processing costs;

(4) cutting the same volume consumes only 20% of the energy of grinding, resulting in less cutting heat, the processing surface is not easy to cause burns and tiny cracks, easy to maintain the integrity of the surface properties of the workpiece;

(5) In the same metal removal rate, hard cutting saves energy compared with grinding.