Self-adaptive press-fitting machine, automatic press-fitting system and press-fitting method thereof

Abstract

The invention discloses a self-adaptive press-fitting machine, an automatic press-fitting system and a press-fitting method thereof. The self-adaptive press-fitting machine comprises a pressure head and a driving device for driving the pressure head to move in a first direction and a second direction in a reciprocating mode, the pressure head is connected with the driving device through a coaxiality fine adjustment device. According to the scheme, the design is ingenious, the structure is simple, and the coaxiality fine adjustment device is arranged between the pressure head and the driving device, so that the pressure head can swing slightly with respect to the driving device; when press fitting is carried out, if a column-shaped body and a hole or a groove are not in a co-axial state, the column-shaped body clamped by the pressure head can be coaxial with the hole or the groove through slight swinging of the pressure head, so that the coaxiality is improved, and smooth press fittingis facilitated; and meanwhile, the damage of the column-shaped body or a workpiece easily caused by direct rigid pressing can be avoided, and the safety of press fitting is guaranteed.

Description

technical field [0001] The invention relates to the field of press-fitting equipment, in particular to an adaptive press-fitting machine, an automatic press-fitting system and a press-fitting method thereof. Background technique [0002] At present, in the field of automatic assembly production lines of automobile engines and new energy motors, there are often assembly operations that need to press-fit the first component into the second component. During assembly, the second component is usually placed on a pallet, and the pallet follows the conveyor line (Roller line) After being transported to the press-fitting position, the No. 1 component is axially pressed into the No. 2 component on the pallet by the press-fitting machine. [0003] In a common press-fitting machine, the indenter is fixedly connected to the power structure that drives it to press, or the indenter can float in the axial direction. At this time, if the No. Make the No. 1 component and No. 2 component ad...

AI Technical Summary

Problems solved by technology

[0003] In a common press-fitting machine, the indenter is fixedly connected to the power structure that drives it to press, or the indenter can float in the axial direction. At this time, if the No. 1 component and the No. Adjust the No. 1 component and No. 2 component to a coaxial structure, and the large press-fitting force can easily cause hard contact between the No. 1 component and the hole or groove on the No. This kind of problem is more obvious during the press-fitting, which seriously affects the quality of the press-fitting, and the fact that the two are not coaxial also increases the difficulty of the press-fitting

[0004] At the same time, it is necessary to place the No. 1 component into the hole or groove of the No. 2 component before press-fitting. Generally, the loading work is done manually or by manipulators. Manual loading is labor-intensive and there are certain safety hazards; and Manipulator loading requires a separate addition of manipulators and structures that drive them to move, which increases the cost of equipment components; in addition, conventional manipulators basically use force from the outer wall of the workpiece to clamp, while hollow pins and other very small volume For thin-walled parts, conventional pneumatic grippers are difficult to control the clamping force, and it is easy to deform the hollow pin due to excessive clamping force, which affects the use; while the clamping force is too small, it is prone to poor clamping stability.

[0005] Finally, the conventional press-fitting operation is carried out directly on the conveyor line. At this time, due to the high pressure of the press-fitting, it is easy to cause certain damage to the conveyor line; there are also some jacking or lifting devices that are used to lift the pallet before press-fitting. The structure is separated from the conveying line and then press-fitted, but commonly used jacking equipment, such as the Chinese patent application number 201620030031.6, in its disclosed structure, the expansion and contraction direction of the cylinder is consistent with the up and down movement direction of the jacking member

[0006] However, in this structure, since the direction of the press-fitting force is the same as the expansion and contraction direction of the piston rod of the cylinder during press-fitting, when all the pressure is applied to the piston rod of the cylinder, the piston rod is driven to retract. At this time, the power of the cylinder itself The combined action of pressure and pressure can easily cause problems such as deformation of the piston rod, resulting in damage to the cylinder. At the same time, due to the limitation of the cylinder air source, the support force of the cylinder often has the problem that the support strength cannot be guaranteed, which is not conducive to ensuring the press-fitting accuracy.

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