How to make fixture

The exact definition of fixture is not found (and there is no need to investigate. It is enough to know what it is). I think it is an auxiliary device specially made for solving practical problems or realizing a certain function. Features: simple structure, wide range of applications, a wide range of types, can be a piece of iron, can also be a device. For example, grinding machine block can be called clamp fixture; for example, hi pot tester can be called fixture. (Note: the noun comes from Japan, we call it tool)

The electronic industry’s clamping fixture can be roughly classified into pressing, bending, cutting, riveting, welding, testing and fixing. Of course, it can also be divided into ordinary and special categories, which can be sorted out according to personal preference or professional secretary. Basically, in addition to electrical testing and welding, most factories have their own design department or simply make their own. It can be asserted that where there is an electronic factory, there will be clamping tools; where there is no electronic factory, there will be clamps everywhere.

In a sense, fixture design can exercise a person’s ability of abnormal analysis and problem solving, while the design ability is relatively complex, and equipment such as automata will be relatively weak and secondary. There are two reasons

1. The fixture design is simple, easy to use and safe, which is reflected in the structure and the workpiece. So, knowing how to do it, from drawing to assembly to debugging success, it hardly takes much effort. However, some of the objects of the fixture service are difficult products that can not be automated and manual operation is difficult. At this time, headache will often occur. If there is a problem that is not the problem of the machine itself, but if there is a lack of ability to analyze and identify and solve the problem, it will be confused and cheated, and will be made to sleep and eat uneasily, and the hair is like a hedgehog every day:)
2. In general, the most important consideration for fixture design is not the machine itself, but the product or process. No matter how you do it, the cost of each fixture is not different (the project cost is limited to death). Even if you spend more than 30000 yuan or 50000 yuan, the enterprise can accept it. If you have rich experience in product and process, you can always understand the opportunity and put forward improvement to the possible problems of the product before production At the same time, draw up a set of reasonable and efficient production plan, and then refine it to the production of fixture and fixture in each work station, which will guarantee the cost control and efficiency improvement in a long term, which is the most important part of the enterprise. There will be many solutions for the fixture of the same work station. Sometimes it is necessary to consider the product characteristics, production capacity requirements, cost control and other factors before finalizing. In fact, this process is more an analysis capability than a design capability.

Today, the development of mechanical technology has been very mature. Why we still encounter various difficult problems and why some technical problems are insurmountable are largely related to factors other than machinery which are developing faster and changing with each passing day.

Although the fixture is simple and easy to use, its design concept and level can basically reflect a person’s mechanical skills;

Of course, most of the designers do not dare to use 2D software, and most of them are afraid to use 3D software. Of course, most of the designers are afraid to use 2D software, and most of them are afraid to use 3D software. I personally think that for beginners, 3D design and 2D drawing is definitely an ideal way. Software such as Pro-E, SOLIDWORK, onespace, etc. is not too hard to learn, and the part used for fixture design can be easily learned. Three dimensional software has an advantage: it is more intuitive. People who can’t understand the drawings can operate and “touch” the drawings, which liberates the obstacles of reading and imagination in design. Similarly, good idea or design inspiration can be expressed quickly and clearly as long as you move the mouse and keyboard. The idea has been completely described. In fact, the design is half finished, including the highest half as far as possible. Of course, emphasizing the benefits of three-D design here is by no means a denial of 2D

The first step in fixture design is to understand the product. Deep understanding of the product, in fact, to do clamping fixture Baili no harm. If we grasp the products at the beginning, we can avoid detours and eliminate many possible problems in the future

The second step of design, of course, is the design concept. Everyone knows that the fixture is simple, but as mentioned above, it takes a lot of brains. There are a lot of things involved. What I think is the essence has been summed up in one sentence: accurate positioning, stable limit, easy taking and placing, less processing and skillful structure. Don’t look at these words, can be integrated cost, man-machine, organization and other related content, everyone may master and application level is not the same, but absolutely should be used. In the actual design, there are more things to use, such as cams, connecting rods, springs, cylinders, motors, bearings wait. There are also a lot to consider, such as whether the tool has strong interchangeability, whether the rack can support it, whether the clearance of the positioning groove is appropriate, and what to do in case of material jam To sum up, in fact, this step can be said to be the most demanding step, that is to say, the design with substantial significance.

The next step is to check while drawing. When it is almost finished, the drawing will be thrown out for processing. Then, when the workpiece comes back, it will be installed and tried. If there is any problem, it should be corrected as soon as possible, so as to avoid being too late. Then it is the sample stage. It may be very smooth or troublesome. It is necessary to think about it carefully. It’s better not to concern yourself and ask questions