Assembly phase control method of crank head connecting block for large-interference crank shear

Abstract

The invention discloses an assembly phase control method of a crank head connecting block for a large-interference crank shear. The assembly phase control method comprises the following steps of: 1. production of tooling; 2. on a connecting plate, according to the indexing size of the same position of four screw holes used for buckling with a gland on the outer end surface of an upper crank head connecting block, respectively marking out processing lines of four holes B corresponding to the four screw holes one by one; 3. connecting the tooling and the upper crank head connecting block by four screws into an assembly body in a buckling way; 4. processing holes A in the tooling and the upper crank head connecting block, and then putting dowels in the holes A; and an angle milling head milling the processing surface of a transverse plate on the tooling; 5. assembling a lower crank head connecting block, and then assembling the upper crank head connecting block, so that the Ra3.2mum processing surface of the transverse plate on the tooling can cling to a lower shear blade surface to slide; and 6. dismantling the tooling, and assembling other parts. According to the method provided by the invention, the phase can be precisely controlled, and the installation is successful once.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment manufacturing, and relates to a method for controlling the assembly phase of a crank head connecting block of a large surplus crank shear. Background technique [0002] At present, a kind of crank shear is widely used in steel mills, and the structure diagram is as follows figure 1 , figure 2 As shown, due to the strict phase requirements between the upper and lower upper crank head connecting blocks, and the high margin requirements between it and the upper bushing of the transmission shaft, the problem encountered during assembly is how to Accurately control the phase relationship between the upper and lower crank head connecting blocks. Once the phase control is not good during assembly and the error is large, if you rework and disassemble it, the crank head connecting block will It is difficult to disassemble, which causes the cutting blades to fail to overlap and cannot be use...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for controlling the assembly phase of the connecting block of crank shears and crank heads with a large surplus, which solves the problems of low installation success rate in the prior art, poor phase control once assembled, and time-consuming and labor-intensive problems in rework

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