Basic knowledge of tooling fixture design
An excellent machine tool fixture must meet the following basic requirements.
1.Guarantee the machining accuracy of the workpiece .The key to guarantee the machining accuracy lies firstly in the correct selection of positioning reference, positioning method and positioning elements, and if necessary, positioning error analysis, and also pay attention to the influence of the structure of other parts in the fixture on the machining accuracy to ensure that the fixture can meet the machining accuracy requirements of the workpiece.
2.Improve production efficiencyThe complexity of the special fixture should be adapted to the capacity situation, and various fast and efficient clamping mechanisms should be used as far as possible to ensure easy operation, shorten auxiliary time and improve production efficiency.
3.Good process performance The structure of the special fixture should be simple and reasonable to facilitate manufacturing, assembly, adjustment, inspection, maintenance, etc.
4.the use of good performance fixtures should have sufficient strength and rigidity, easy to operate, labor-saving, safe and reliable. Under the premise that the objective conditions allow and economical, pneumatic, hydraulic and other mechanized clamping devices should be used as far as possible to reduce the operator’s labor intensity. Tooling fixtures should also be convenient chip removal. If necessary, chip removal structure can be set up to prevent chip damage to the positioning of the workpiece and damage to the tool, to prevent the accumulation of chips to bring a lot of heat and cause deformation of the process system.
5.Good economy special fixture should adopt standard components and standard structure as far as possible, and strive for simple structure and easy manufacturing to reduce the manufacturing cost of fixture. Therefore, the design should make necessary technical and economic analysis of the fixture scheme according to the order and production capacity in order to improve the economic efficiency of the fixture in production.