Pressure and displacement double-control press fitting machine

Abstract

The invention discloses a pressure and displacement double-control press fitting machine which is used for press fitting of a ball pin seat and a knurl bolt. The pressure and displacement double-control press fitting machine comprises a machine table, a base, a carrier, a machine body, a first air cylinder and a press fitting punch. The base is fixed to the machine table, the carrier is installed on the upper surface of the base, the machine body is arranged above the base, the first air cylinder is installed above the machine body, and the press fitting punch is driven by the first air cylinder and penetrates through the machine body. A pressure sensor is arranged on the press fitting punch, a travel switch is arranged on one side of the base, and a collision block used for making contact with the travel switch is arranged on the side of the press fitting punch. According to the pressure and displacement double-control press fitting machine, whether the press fitting punch is displaced or not is judged through the condition whether the travel switch makes contact with the collision block, press fitting force is detected through the pressure sensor on the press fitting punch, only when both the displacement condition and the press fitting force condition reach the standards, press fitting can be represented correctly, and installation badness caused by the mismatch of press fitting holes of the knurl bolt and the ball pin seat is avoided.

Description

【Technical field】 [0001] The invention relates to mechanical processing technology, in particular to a pressing machine based on dual control of pressure and displacement. 【Background technique】 [0002] In the assembly of some auto parts, an interference fit method is required. Due to the large press-fitting force, this kind of installation usually needs to be completed by machinery, such as the press-fitting of ball pin seats and knurled bolts. The root of the knurled bolt has a circle of knurled pattern slightly larger than the press-fitting hole of the ball pin seat. During press-fitting, the knurled portion will be deformed when it is forced into the hole, resulting in an interference fit. Due to the elastic force generated by the radial deformation, the rolling The flower bolt will stay in the press-fit hole of the ball pin seat, and it will not be easy to loosen after the two are matched. The press-fitting machine used in the past technology can usually determine whe...

AI Technical Summary

Problems solved by technology

The press-fitting machine used in the past technology can usually determine whether the knurled bolt and the ball pin seat are pressed in place from the press-fit stroke. However, the clamping force between the two cannot be judged. If the ball pin seat press-fitting hole is relatively large, While the outer diameter of the knurled part is relatively small, the clamping force between the two may not be enough, and it may even fall off immediately, so that the press-fitting effect cannot be achieved.

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