Method for processing bolt hole for framework gearbox mounting seat

Abstract

The invention discloses a method for processing a bolt hole for a framework gearbox mounting seat. The method comprises the following steps of 1) installing a first drill bit on a knife handle, and processing a first bolt hole in a first seat plate, wherein the length of installing the first drill bit and the knife handle together is smaller than a distance between the first seat plate and a second seat plate, and the outside diameter of the knife handle is smaller than equal to the pore diameter of the first bolt hole; 2) disassembling the first drill bit; 3) placing a second drill bit between the first seat plate and the second seat plate, and enabling the second drill bit to penetrate through the first bolt hole and be installed on the knife handle; 4) utilizing the second drill bit toprocess a second bolt hole in the second seat plate, and disassembling the second drill bit after drilling. The method provided by the invention can process the bolt holes of the two seat plates without adding special equipment and procedure, solves the problem that the existing standard twist drill cannot process the bolt holes of the two seat plates at the same time and reliably ensures a production takt of a production line.

Description

technical field [0001] The invention belongs to the technical field of bogie frame accessories processing, and in particular relates to a method for processing a pin hole of a frame gearbox mounting seat. Background technique [0002] The frame design of some existing bogies has two gearbox mounts, and each mount is formed by welding two seat plates. The thickness of the seat plate is 20mm, and the distance between the two seat plates is 130mm. The Y-direction distance between one seat plate and the motor suspension seat at both ends of the mounting seat is 218mm, and the Y-direction distance between the other seat plate and the side beam is 434mm. The Z-direction distance of the brake mounting seat is 218.3mm. The machining dimension of the pin hole diameter is φ30 (+0.2,+0.4) mm. Wherein, the Y direction refers to the transverse direction of the frame, and the Z direction refers to the vertical direction of the frame. [0003] At present, in the domestic machining indus...

AI Technical Summary

Problems solved by technology

[0010] In order to solve the technical problem that the length of the tool is too short to reach the stroke from the first seat plate to the second seat plate, or the length of the tool is too long to go down for processing, the invention provides a processing frame gear box mounting seat The method of the pin hole, the specific technical scheme is as follows

Images