Crank pin end pore finishing process

Abstract

The invention discloses a finishing process of a crank pin end pore. In the crank pin end pore finishing process of the invention, a processing channel needs to be constructed before finishing; the constructional element of the processing channel mainly comprise a crank pin end pore of a connecting rod, a first pore path and a second pore path which are tightly connected to the two end surfaces of the crank pin end and have the same axial line with the crank pin end pore; the first pore path and the second pore path of the processing channel is respectively internally provided with a piston; in the constructing process of the processing channel, the processing channel is filled with fine particles grinding materials in match with the finishing; then the two pistons are driven to carry outsynchronous reciprocating motion under the pressure of 5 to 10 MPa to perform the crank pin end pore finishing procedure until the required surface roughness is achieved. The invention provides a crank pin end pore finishing process with high processing efficiency, and better maintenance of surface quality and geometric tolerance of the crank pin end pore.

Description

(1) Technical field [0001] The invention relates to a smoothing process of the big end hole of the connecting rod, that is, a method of improving the surface quality of the big end hole of the connecting rod through smoothing, refining the surface roughness, improving and improving the surface quality of the parts, and maintaining the shape and position tolerance of the big end hole of the connecting rod processing technology. (2) Background technology [0002] The honing process is generally used in the machining of the inner hole of the connecting rod. Honing is a finishing method for hole machining with a whetstone. This method needs to be carried out on the basis of grinding or fine boring. Honing is a low-speed large-area contact grinding process, which is basically the same as the grinding principle. The abrasive tool used for honing is a honing head composed of several fine-grained whetstone strips. During honing, the honing stone of the honing head has three kinds ...

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Problems solved by technology

Moreover, the movement form of the honing head is complex during the honing process, and the requirements for the honing machine are relatively high.

[0003] In addition, China's invention patent application No. 2008100799875 discloses a process for finishing using ultrasonic technology, which is suitable for finishing holes, especially holes with complex cavities, but its processing efficiency is low, and due to ultrasonic In the process of processing, the supernatural energy will also act on the tool itself, and the loss of the tool itself is relatively serious.

[0004] At present, there is also a mechanical electrolytic composite machining process in the hole finishing process, which combines rough machining and finishing machining into one process. low

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