CN-121571948-B - Compressor front cover processing method

CN121571948BCN 121571948 BCN121571948 BCN 121571948BCN-121571948-B

Abstract

The invention discloses a method for machining a front cover of a compressor, which comprises the following steps of a, machining the front cover, namely, machining the whole shape of the front cover, roughly machining a pin hole and a mounting hole of a spindle head pump, and reserving finish machining allowance, b, machining a machine body, namely, installing the front cover, namely, d, machining a pin hole, e, installing the pin, f, finely machining the mounting hole, namely, synchronously carrying out finish machining on the front cover and the mounting hole of the spindle head pump on the machine body by adopting a long-edge boring cutter on a numerical control boring machine by taking the central coordinate of a bearing position of the machine body as a reference. Through the steps, the coaxiality of the front cover and the mounting hole on the machine body is higher, and the front cover is convenient to mount.

Inventors

SHAO YINGCHUN
WANG LILI
WU MENG
LI JUNZHE

Assignees

默泰克（天津）石油装备有限公司

Dates

Publication Date: 20260512
Application Date: 20251223

Claims (4)

1. A method for processing a front cover of a compressor is characterized by comprising the following steps: a. Machining a front cover, namely machining the complete shape of the front cover, performing rough machining on a pin hole and a mounting hole of a spindle head pump, and reserving finish machining allowance, wherein at least one process boss or a positioning groove is machined on the matching surface of the front cover and a machine body; b. machining the machine body, namely machining a rough blank of the machine body on a numerical control boring machine to finish machining a front cover mounting surface, and machining a corresponding structure matched with the process boss or the positioning groove on the front cover mounting surface; c. The front cover is arranged, namely the front cover is pre-positioned with a corresponding structure on the machine body through the process boss or the positioning groove, and the front cover is fixedly connected with the machine body on the numerical control boring machine through bolts, so that the front cover and the machine body are combined into a whole; d. pin hole machining, namely adopting the same boring cutter to finish machining the pin holes on the front cover and the machine body synchronously on the numerical control boring machine; e. pin installation, namely installing a pin in the pin hole after finish machining; f. Finishing the mounting hole, namely finishing the front cover and the shaft head pump mounting hole on the machine body synchronously by adopting a long-edge boring cutter on the numerical control boring machine by taking the central coordinate of the bearing position of the machine body as a reference; In the step d, a double-edge stepped boring cutter is adopted for processing, a short edge section of the double-edge stepped boring cutter is utilized for semi-finishing a pin hole of the front cover, and a long edge section of the double-edge stepped boring cutter is utilized for synchronously carrying out one-step forming and finish boring on the front cover and a pin hole of a machine body; In the step e, the pin is a sectional pin, the middle section is a positioning section, the two ends are guide sections, and the diameter of the guide sections is smaller than the aperture; in the step f, during finish machining, an online measuring head is integrated on a boring cutter bar and is used for detecting the aperture and the roundness in real time and feeding back and adjusting the cutter complement; The boring cutter is arranged obliquely to the horizontal plane, and the included angle between the boring cutter and the horizontal plane is alpha 1, wherein the included angle is 50 degrees < alpha 1<60 degrees.
2. The method of claim 1, wherein in the step a, the tolerance between the boss or the positioning groove and the corresponding structure on the machine body is H7/g6.
3. The method for machining the front cover of the compressor of claim 1, wherein in the step d, a tool bolt with torque limitation is used for fixing, the clearance between the front cover and the joint surface of the machine body is ensured to be less than or equal to 0.02mm, and after the installation, the temporary coordinate system model is called in a numerical control system, and the front cover is brought into the same coordinate system.
4. The method of claim 1, wherein the cooling tube is disposed at the front end of the boring cutter, the cooling tube faces the edge of the boring cutter, and the angle between the cooling tube and the boring cutter in the vertical direction is beta, 40 DEG < beta <60 deg.

Description

Compressor front cover processing method Technical Field The invention relates to the technical field of compressors, in particular to a method for processing a front cover of a compressor Background The existing machine body and front cover machining processes of the compressor are divided, rough machining and fine machining are firstly carried out on the machine body, after the machine body is detached from a machine tool, rough machining and fine machining are carried out on the front cover, then the front cover is detached, and assembly is carried out, so that the manufacturing of the shell of the compressor is completed. But the compressor is mainly the compression pump, and in the in-process of installation, the axle of spindle nose pump needs to pass the mounting hole on organism and the protecgulum, and foretell processing method can lead to the condition that the axiality is inaccurate to appear in the spindle nose pump mounting hole of organism and protecgulum, in the in-process of equipment compressor, need the manual correction of workman who has sufficient experience, and dismantle the inspection after, need recalibrate axiality, influence the use of compressor. Disclosure of Invention The application provides a method for processing a front cover of a compressor, which adopts the following technical scheme: a method for processing a front cover of a compressor comprises the following steps: a. Machining a front cover, namely machining the complete shape of the front cover, performing rough machining on a pin hole and a mounting hole of a spindle head pump, and reserving finish machining allowance, wherein at least one process boss or a positioning groove is machined on the matching surface of the front cover and a machine body; b. Machining the machine body, namely machining the rough blank of the machine body on a numerical control boring machine to finish machining the mounting surface of the front cover, and machining a corresponding structure matched with the process boss or the positioning groove on the mounting surface; c. The front cover is arranged, namely the front cover is pre-positioned with a corresponding structure on the machine body through the process boss or the positioning groove, and the front cover is fixedly connected with the machine body on the numerical control boring machine through bolts, so that the front cover and the machine body are combined into a whole; d. pin hole machining, namely adopting the same boring cutter to finish machining the pin holes on the front cover and the machine body synchronously on the numerical control boring machine; e. pin installation, namely installing a pin in the pin hole after finish machining; f. And (3) finishing the mounting hole, namely taking the central coordinate of the bearing position of the machine body as a reference, and synchronously finishing the front cover and the shaft head pump mounting hole on the machine body by adopting a long-edge boring cutter on the numerical control boring machine. Through adopting above-mentioned technical scheme, protecgulum and organism convenient processing, but the equal rough machining of spindle nose pump mounting hole on protecgulum and the organism, then can not pull down the boring machine at the organism, so keep the condition that organism own coordinate system does not produce the change, the protecgulum is installed on the organism, then carry out finish machining to the mounting hole of spindle nose pump to can guarantee the axiality of mounting hole on protecgulum and the organism, so follow-up in the in-process of equipment compressor complete machine, do not need repetitive adjustment axiality, improve work efficiency. Optionally, in the step a, the tolerance between the process boss or the positioning groove and the corresponding structure on the machine body is H7/g6. Through adopting above-mentioned technical scheme, through setting up auxiliary positioning structure on protecgulum and organism to combine numerical control system to the real-time record and the calling of organism coordinate, realized "physics+digit" dual location, reduce the random error in the installation by a wide margin, guarantee the uniformity of combination processing coordinate system. Optionally, in the step d, a tool bolt with torque limitation is used for fixing, so that the clearance between the front cover and the joint surface of the machine body is less than or equal to 0.02mm, and after the installation, the temporary coordinate system model is called in the numerical control system, and the front cover is brought into the same coordinate system. . By adopting the technical scheme, the consistency of a coordinate system can be further ensured, and the coaxiality during processing is further ensured. Optionally, in the step d, a double-edge stepped boring cutter is adopted for processing, the pin hole of the front cover is firstly semi-finished by utilizing the short edge section of the d