The design of tooling fixtures is generally carried out after the machining process of a part has been formulated to meet the specific requirements of a particular process. The formulation of the process should take full account of the design of the fixture, while the design of the tooling fixture can also modify the process.
The quality of the tooling fixture design is measured by some of the following criteria:
1. The ability to stabilize the machining quality of the workpiece.
2. High productivity and low cost.
3. Convenient chip removal, safe and labor-savingoperation.
4. Ease of manufacture and maintenance.
Basic principles of tooling fixture design
1. Meet the stability and reliability of the workpiece positioning during operation;
2. Sufficient load-bearing or clamping force is available to ensure that the workpiece can be machined on the fixture;
3. Simple and fast operation during clamping;
4. Wearable parts must be quickly replaceable, preferably without other tools;
5. Satisfy the reliability of repetitive positioning of fixtures during adjustment or replacement;
6. Avoid complex structures and high costs;
7. Use standard parts as component parts as much as possible;
8. Formation of company systems and standards.
Basic knowledge of tooling fixture design
An excellent machine tool fixture must meet the following basic requirements:
1. Ensure the machining accuracy of workpieces. The key lies in the correct selection of positioning datums, positioning methods and positioning elements. If necessary, it is also required to analyze the influence 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. Specialized fixtures to improve productivity should be adapted to the production capacity. Try to use fast and efficient clamping mechanism to ensure easy operation, shorter auxiliary time and higher productivity.
3. The structure of the special fixture with good mechanical properties should strive to be simple, reasonable and easy to manufacture, assemble, adjust, inspect and repair.
4. Fixture should have enough strength and rigidity, more pneumatic, hydraulic and other mechanized clamping devices to reduce the operator’s labor intensity.
5. Easy chip removal prevents chips from disrupting the positioning of the workpiece and damaging the tool. In addition, it prevents the collection of chips that can generate large amounts of heat and cause deformation of the process system.
6. Standard components and construction are used to reduce the cost of manufacturing fixtures.
Problems should be considered in the tooling fixture design
Fixture design is generally single structure, but if the design process does not consider these issues will inevitably lead to unnecessary trouble.
1. The blank allowance of the machined workpiece. Be sure to prepare rough drawings before designing to allow for sufficient space.
2. Smoothness of chip removal. Due to the limited machining space of the machine tool, which leads to a tight fixture space, it is often ignored that the chips generated during machining will be deposited in the dead space of the fixture. Problems that may occur during machining should be considered at the beginning of the design, after all fixtures are used to improve efficiency and ease of operation.
3. Replaceability of positioning elements. Positioning elements are easily worn out, so they should be easy to replace and should not be designed to be larger parts, ideally.
Summary
All in all, the experience of fixture design is very important, sometimes the design and the actual application are not the same thing, which is why a good design is a process of continuous improvement and summarization.
However, CYCO, with over twenty years of specialized CNC machining experience, can provide some professional references to help you with your fixture design. We promise that we will machine fixtures with high quality and precision to meet your needs.
In order to avoid wasting your valuable time, you can choose CYCO as your partner without any hesitation!
Contact us for a worry-free experience now!
