Tooling fixture design issues that should be considered

by:Top Talent     2020-06-30
With the development of the machining industry, tooling fixtures have also received more and more attention, and are widely used in the field of machining, becoming an indispensable part of machining. Driven by the development of machine tool technology in the direction of high speed, high efficiency, precision, compound, intelligence and environmental protection, fixture technology is developing in the direction of high precision, high efficiency, module, combination, general purpose and economy. Issues to be considered in tooling fixture design The design of the fixture is generally single in structure, giving the impression that the structure is not very complicated. Especially now that hydraulic fixtures are popular, their original mechanical structure is greatly simplified, but if they are not considered in detail in the design process, there will inevitably be unnecessary trouble: 1. The blank balance of the workpiece The blank size is too large, causing interference. So be sure to prepare the rough drawing before designing. Leave enough space 2. Smoothness of chip removal Due to the limited processing space of the machine tool during design, the fixture is often designed in a relatively compact space. At this time, the iron chips generated during the machining process are often ignored to accumulate in the dead corner of the fixture. Including the outflow of cutting fluid, it brings a lot of trouble to the future processing. Therefore, at the beginning of the actual process, the problems in the process should be considered. After all, the fixture is based on improving efficiency and convenient operation. 3. The overall openness of the fixture Ignoring the openness, it is difficult for the operator to install the card, time-consuming and laborious, and the design is taboo 4. Basic theoretical principles of fixture design Each set of clamps has to undergo countless clamping and loosening actions, so it may meet the user's requirements at the beginning, but the addition should have its accuracy retention, so do not design something contrary to the principle. Even if it's a fluke right now, there won't be a long-lasting continuity. A good design should be tempered by time. 5. Replacement of positioning elements The positioning element is seriously worn, so replacement and quickness should be considered. It's better not to design into larger parts Accumulation of fixture design experience is very important. Sometimes design is the same thing, and it is the same thing in actual application. So good design is a process of continuous accumulation and summary. Taking into account the issues to be noted in the design of tooling fixtures, we must also adhere to the following basic principles of tooling and fixture design: 1. Meet the stability and reliability of workpiece positioning during use 2. There is enough bearing or clamping force to ensure the processing of the workpiece on the tooling fixture 3. Meet the simple and fast operation in the clamping process 4. The vulnerable parts must be of a structure that can be replaced quickly. It is best not to use other tools when the conditions are sufficient. 5. Meet the reliability of repeated positioning of the fixture during adjustment or replacement 6. Avoid complex structures and high costs as much as possible 7. Choose standard parts as component parts as much as possible 8. Systematization and standardization of the company's internal products
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