Cylinder sleeve pressing head device

Abstract

The invention discloses a cylinder sleeve pressing head device, and belongs to the field of cylinder sleeve press fitting tools. The cylinder sleeve pressing head device comprises a guiding block, a pressing head body, a guiding sleeve, an oil cylinder piston rod, an adjusting screw seat and a conical shaft, wherein the lower portion of the conical shaft is connected with the adjusting screw seat after penetrating in the guiding block; the lower portion of the guiding block is in the shape of an inverted cone; the lower portion of the pressing head body is connected with the guiding block through the upper portion of the conical shaft; the outer diameter of the lower portion of the pressing head body is the same with that of the guiding block when the pressing head body is in a contraction state; and the upper portion of the pressing head body is connected with the guiding sleeve through the oil cylinder piston rod. The cylinder sleeve pressing head device has the advantages that a cylinder sleeve cannot be out of round while the cylinder sleeve pressing head device takes materials automatically, a function of automatic centering can be realized, namely, the pressing head can be ensured to be pressed in the cylinder sleeve, and the cylinder sleeve can also be ensured to be accurately pressed in a cylinder body; and moreover, the pressure change condition can be timely and automatically fed back in a sleeve pressing process, can be monitored in real time, and then is controlled in real time.

Description

technical field [0001] The invention relates to a cylinder liner pressing machine part, more specifically, to a cylinder liner pressing head device. Background technique [0002] The cylinder liner of the engine block is a key part of the engine. When the engine is working, the piston reciprocates in the cylinder. In order to improve the wear resistance of the cast iron cylinder bore, a thin-walled steel sleeve is pressed into the cylinder bore. The pressed thin-walled steel sleeve has high hardness, high surface quality and high wear resistance, which greatly improves the life of the engine. However, it is more difficult to press-fit such a thin-walled cylinder liner. Improper press-fitting will cause serious deformation of the inner hole of the cylinder liner, crush the cylinder liner, cause waste and affect the performance of the engine. Existing special-purpose press-fit tool, its press-fit principle is, press head is packed into the top of cylinder liner, then press in...

AI Technical Summary

Problems solved by technology

Because the guide part of the cylinder liner itself is very short, the cylinder liner cannot be well positioned and guided during press-fitting, and the pressure is uneven, which makes the deformation of the cylinder liner seriously out of tolerance after being pressed in, making the cylinder liner out of round

After the deformation is out of tolerance, the cylinder liner must be removed, causing great trouble and waste to normal production

At the same time, the existing indenter body retrieving process is mostly manual operation, and the productivity is low

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