Generally speaking, in addition to the positional relationship and structure of the components, it is important that the assembly machine determines the fit between the components. In particular, it determines the size of the precision and performance of the machine. It is necessary to pay attention to the relationship between them.
The mechanical precision design of hydraulic cutting machine is an important part of machine design. Whether it is designing complex and sophisticated boring machines, rockets or simple machines such as reducers, it is necessary to consider the conceptual concept design, the knot, the art design and the precision design. When designing for precision, you need to consider how to achieve the functional requirements of the machine, and also consider whether it can be manufactured as required.
In the traditional concept, the cutting machine is a machine that presses the die by means of the force of the machine motion to cut the material. However, modern cutting machines have undergone some changes, and advanced technology such as high-pressure water jets and ultrasonic waves have been used in leather punching technology, but these devices are still classified in cutting machine equipment.
Mechanical transmission cutting machine, although there are still manufacturers continue to produce, some small, individual manufacturers are still using, but this form of cutting machine is bound to be eliminated . The hydraulic drive cutting machine is still in the mainstream. Among the hydraulic cutting machines, a large number of rocker-type cutting machines with a tonnage of 14-18 tons are used.

The equipment to be introduced today is a projection cutting machine imported from abroad. The equipment is equipped with an oscillating cutter and a visual observation device. It is used to scan the outline of the leather or to project on the leather to guide the cutter to arrange the arranging of the blanking template on the leather.

When performing assembly drawing design, there are analogy, calculation, and test methods for determining the limits tolerance and fit. The calculation method and the test method are methods for determining the coordination relationship by means of calculation or experiment. It has the characteristics of reliability, precision and science, but it takes a lot of cost and time, and the stone is too economical.