Chengdu riveting and welding parts production tolerance requirements are very wide, unlike lathe, milling machine, planer as the requirements are very high. It's usually plus or minus two to three millimeters. The requirement of diagonal is higher, but it is positive and negative 2 mm - that is, the small should not be less than 2 mm, and the large should not be more than 2 mm. The tolerance of riveting and welding parts is flexible, which is not as strict as that of lathe and milling machine, because riveting and welding parts are basically assembled into mechanical parts with bolts, so it can be simply said that "as long as the screws can be installed".
For example, if the tolerance of some riveted and welded parts is larger, it can't be smaller, so our riveter will make it bigger; if the tolerance of some riveted and welded parts is smaller, it can't be bigger, so our riveter will make it smaller. This is also because the tolerance of riveted and welded parts is more flexible.

Production process:
The manufacture of riveted weldment is a welding method of electric welding. The common welding method is to penetrate the welded object with welding rod. It is generally used for welding thicker metals. Riveting is divided into cold riveting and hot riveting. Cold riveting is connected with rivets. Hot riveting is welding. That is, the joint parts of two metals are melted together by high temperature. Of course, the welding materials can be metal or non-metallic. The process of making and processing riveting weldments, especially the parts (such as plastic and metal) made by the fruit farmers connecting different materials. One part has riveting column and extends into the hole of the other part. Then, the rivet column deforms through the cold flow or melting of plastic to form the rivet head, and the two parts are mechanically locked together. The technology is fast and economical, and has the advantage of not consuming rivets and screws.
By changing the design of welding head, many different rivet head designs can be obtained. For general purpose riveting, riveting columns with diameter of 1.6 to 4mm (1 / 16-5 / 32 in) are recommended. Small riveting columns with diameter less than 1.6mm (1/16 in) are recommended for spherical riveting. Even plane riveting is used in applications where flat surfaces are required. Hollow riveting can reduce dent and shrinkage greatly, and rivet column with diameter greater than 4mm (5/32 in) is adopted.