Vertical processing method for cylinder body large round end surface internal spline

Abstract

The invention discloses a processing method on the cylinder body in which the big round end face is vertical to an internal spline, the invention comprises a cylinder body which is provided with a big round end face and a small round end face, a cylinder hole which extends toward the front end of the cylinder body is arranged in the center of the big round end face, and an internal spline hole which extends toward the rear end of the cylinder body is arranged in the center of the small round end face, and the internal spline hole is communicated with a cylinder hole; for the internal spline hole and the cylinder hole, at least the internal spline is machined during the first step on the inner wall of the internal spline hole, the machined internal spline has an axial lead which is on the same line with that of the cylinder hole, the allowable deviation of the squareness of the big round end face which is machined during the second step is at least less than 0.05 mm; the internal spline can be matched with a spline mandrel which is used for the processing operation of the cylinder body. The invention is simple to be operated and easy to be carried into execution and can effectively meet high verticality requirement of the large round end face to the internal spline, which improves the manufacturing accuracy and quality of the product and reduces the malfunction of the oil pump caused by the reason.

Description

technical field [0001] The invention relates to the technical field of cylinder body processing, in particular to a method for processing a large round end face of a cylinder body perpendicular to an internal spline. Background technique [0002] Cylinder block is one of the most widely used mechanical parts. It is often used in swash plate axial piston pumps. Swash plate axial piston pumps are also widely used in hydraulic systems. The work of swash plate axial piston pumps The principle is: the transmission shaft drives the cylinder to rotate, and the spring presses the cylinder to the distribution plate to ensure the initial seal between them; at the same time, the return plate presses the sliding shoe to the swash plate. When the cylinder rotates, the sliding shoe slides on the swash plate, the plunger reciprocates in the cylinder hole, and the liquid flow enters the distribution plate and the cylinder hole through the casting channel, and then is discharged through anot...

AI Technical Summary

Problems solved by technology

As one of the important accessories of the swash plate axial piston pump, the cylinder block requires that the large round end face of the cylinder block be kept vertical to the internal spline, which is one of the key elements to ensure the realization of the oil pumping function, but the structure of the cylinder block , the effective length of the internal spline is short, far away from the large circle end face, the axial center of gravity is seriously biased towards the large circle end face, it is difficult to meet the high perpendicularity requirements between the large circle end face and the internal spline during processing

The large round end face of the cylinder block and the inner spline are not perpendicular to each other too much, which may easily cause the failure of the oil pump

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