With the development of machining industry, fixture is more and more valued. It is used in the boundary of machining and becomes an indispensable part of machining. With the development of machine tool technology towards the goal of high speed, high efficiency, meticulous, composite, intelligent and environmental protection, fixture technology is developing towards the goal of high precision, high efficiency, module, combination, general and economic.
Problems in design and research of fixture
Generally, the structure of fixture design is single, which makes people feel that the structure is not very complex. The more we find that the hydraulic fixture is widely used, which greatly simplifies the original mechanical structure. However, if we do not conduct detailed research in the design process, we will inevitably encounter unnecessary difficulties:
1. Blank allowance of machined parts
The size of forming blank is too large, and interference occurs. So we must plan the rough drawing before design. Leave plenty of space
2. Chip removal fluency of fixture
Due to the limited machining space of the machine tool, the fixture is often designed in a compact space. At this time, the iron chips in the machining process are often ignored to accumulate at the dead corner of the fixture.
There are many difficulties in the later processing because of the poor discharge of the liquid containing chips. Therefore, at the beginning of essence, we should study the problems in the process of machining. After all, the fixture will increase efficiency and be easy to operate
3. Overall opening of fixture
Neglecting the opening, making it difficult for the operator to install the card, time-consuming and laborious, and design taboo
4. Basic comment principle of fixture design
Each set of fixture has to go through many times of clamping and loosening behavior, so it may reach the user’s requirements at the beginning, but the fixture should have its accuracy maintenance, so do not design some unreasonable equipment.
Even if you are lucky now, it will not last forever. A good design should be tempered by time.
5. Interchangeability of positioning elements
It is important to wear the positioning elements, so it is necessary to study the quick and simple replacement. It is better not to design large parts
The accumulation of fixture design experience is very important, occasionally design is one thing, and in essence use is another thing, so good design is a process of accumulation and summary.
While studying the problems that should be paid attention to in the design of tooling and fixture, we should adhere to the following basic principles in the design of tooling and fixture
1. Meet the safety and reliability of workpiece positioning in the process of application
2. Sufficient bearing or clamping force to ensure the processing process of workpiece on the fixture
3. Meet the requirements of simple and rapid operation in the clamping process
4. Vulnerable parts must be structures that can be exchanged quickly. When conditions are sufficient, it is better not to use other equipment
5. Meet the reliability of repeated positioning of fixture in the process of adjustment or exchange
6. Try to prevent complex structure and high cost
7. Try to select standard parts as component parts
8. Systematization and standardization of internal products of the company
Because of the importance of fixture, its quality and accuracy directly affect the efficiency of machining, so it is very important to control its quality and accuracy from the source and choose a reliable and capable fixture manufacturer. Shenzhen huayanghua has been focusing on automobile inspection tools, fixture, pallet and three-dimensional processing for 13 years. Our team has cooperated with each other and strictly implemented the customer’s product requirements as our guidelines. We have arranged to complete the product requirements according to the quantity and deliver the products on time.
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