Many important holes and flanges in the body stamping parts need to be examined separately. In the production and design of automobile inspection tools, a boss with a thickness of about 1mm is usually added to the specific surface of inspection. The center of the boss is on the same axis as the center of the workpiece hole, and the diameter is 5mm larger than the aperture. Double marking method is adopted to detect the boss. When the precision of the hole to be measured is high, the plug gauge and bushing should be used to locate the hole.
For car production base plate assembly fixture design, in the inspection on the concrete surface tensile distance along the direction of datum, make its zui lows is greater than the thickness of 150 mm, to ensure that the car fixture production has enough strength, at the same time try to let the car fixture production base, the base plate assembly (base) on the surface of the body coordinate system of the integer. The bottom plate assembly of automobile inspection tool making body is generally composed of substrate, channel steel (add I-steel in the middle when necessary), positioning block and universal wheel. After the substrate is fixed by inspection, other components can be selected according to the actual situation.
In the manufacturing process of automobile inspection tools, trimming and punching processes are always the difficulties in the mold manufacturing process, especially for some large automobile molds with complex structure such as bevel cutting, bevel punching and bevel turning. If the traditional production method is adopted to determine the trimming line, it is very difficult and requires repeated fumbles for several times or even more than ten times, which brings great workload to the fitters and processing equipment. It not only puts forward higher requirements on the skill level of the fitters, but also seriously affects the debugging of the molds in the later process. And in reality there are a lot of trimming and piercing die cutting edge material from the consideration on the cost of the alloy steel, using traditional method of trimming die making, is hard to avoid can repeatedly surfacing welding was carried out on the blade, due to the material in the process of repeatedly surfacing, easy cracking and the insert scrap, will have to fill material processing again, such not only cycle will be lag, and mold production costs will be greatly increased.
If the laser cutting technology, for the development of auto parts, such as drawing a test after the success, can use the laser cutting instead of trimming, punching process, the car fixture repair line for cutting, the cutting of the proceeds of the samples are directly used in the flanging process to carry on the test, the income of zui samples are compared with fixture, if there is a difference, through the computer for the last line can be cut again, until success. The whole manufacturing process of automobile inspection tool saves two working procedures, completely changes the traditional single-wire serial manufacturing mode, greatly shortens the technological process and reduces the cost of mold making.
