Fixture assembly for machining and positioning engine cylinder block

Abstract

The invention discloses a fixture assembly for machining and positioning an engine cylinder block. The fixture assembly comprises a base, two supporting blocks symmetrically arranged on the base and used for supporting the potions close to the two ends of a cylinder block crankshaft hole, at least one X-direction positioning column, at least one vertical Y-direction positioning column, four supporting oil cylinders and four lever oil cylinders, wherein the X-direction positioning columns are arranged on the base and used for extending into cylinder holes to achieve X-direction positioning of the cylinder block; the Y-direction positioning columns are arranged on the base and used for extending into cylinder holes to achieve Y-direction positioning of the cylinder block; the four supporting oil cylinders are arranged on the base in a rectangular shape and used for supporting the bottom face of the cylinder block; the four lever oil cylinders are symmetrically arranged on the base and clamp the cylinder block from the two sides; the X-direction positioning columns, the Y-direction positioning columns and the cylinder holes in the cylinder block are correspondingly arranged. By means of the fixture assembly, it can be effectively guaranteed that the center positions of the cylinder holes of the machined cylinder block are accurate, the wall thickness of the cylinder holes is uniform, machining precision is high, and the fixture assembly is easy to use and popularize.

Description

technical field [0001] The invention relates to the technical field of clamps for processing engine cylinder blocks, in particular to a clamp assembly for processing and positioning engine cylinder blocks. Background technique [0002] The cylinder block is the core component of the engine, and the cylinder bore and crankshaft hole are the main structures of the cylinder block. The accuracy of its position affects the compression and combustion of the fuel to push the piston to reciprocate in the cylinder bore to drive the crankshaft to rotate, and the engine oil forms a protective film on the cylinder wall to lubricate the reciprocating movement of the piston. It can be seen that the machining quality and machining accuracy of the cylinder bore and crankshaft bore of the cylinder directly affect the performance and reliability of the entire engine. Therefore, it is the key to cylinder block processing to design the cylinder block cylinder bore with accurate positioning and...

AI Technical Summary

Problems solved by technology

The advantage of such positioning is that it is easy to select the benchmark, and the casting outer mold of the cylinder body, that is, the side, end surface, and top surface of the cylinder body, can generally find a large plane that is convenient for positioning and pressing. If the mud core moves relative to the two sides, both ends, top and bottom of the cylinder body, the cylinder bore and crankshaft hole will also move accordingly, and choosing the two sides, the top and bottom of both ends as the rough machining positioning reference will make The center position of the processed cylinder bore and crankshaft bore will move, resulting in changes in the length of the inner cavity of the cylinder bore, uneven wall thickness of the cylinder bore, etc., resulting in problems such as insufficient reciprocating stroke of the piston in the cylinder bore and deformation of the cylinder bore, which will affect the whole machine performance

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