Cutting tool with preloaded springs and assembling method thereof

Abstract

The invention discloses a cutting tool with preloaded springs and an assembling method thereof. The cutting tool comprises a tool body, wherein tool grooves are formed in the tool body, threaded through holes are formed between the outer edge of the tool body and the tool grooves, locking screws are arranged in the threaded through holes, pressing blocks are arranged between the locking screws and blades, a spring groove is formed in the inner side face of each pressing block, the preloaded springs are arranged in the spring grooves, the preloaded springs are each provided with a pressure applying portion which makes contact with the pressed face of a blade in the inserting and withdrawing directions in a smooth transition mode, and in a preloaded state, the pressure applying portions of the preloaded springs are higher than the inner side faces of the pressing blocks and are in contact with the pressed surface of the blade. According to the cutting tool, when the tool is assembled, the blade can enter a preloaded state after being inserted into the tool grooves, the blade can be continuously and smoothly inserted into and withdrawn from the tool grooves, adjustment is easy, the number of parts is small, and it can be guaranteed that the blade is in a reasonable stress state.

Description

technical field [0001] The invention relates to the technical field of gear cutters, in particular to a blade-type assembled cutter for cutting gears. The invention also relates to a method of assembling the tool. Background technique [0002] Gear cutting tools basically rotate around the tool axis when cutting, and can be simply divided into integral tools and assembled tools. Assembled knives typically have a tool body that is arranged with one or more pockets to accommodate blades, each insert being positioned in the pocket and locked in place with one or more locking screws and pressure blocks. in the knife pocket. [0003] The blade-type assembled tool requires that on the basis that the cutting edge of the blade reaches a grinding accuracy within a certain tolerance range, the cutting edge of the blade with the same name after assembly must also be adjusted and controlled within a certain tolerance range in the radial and axial directions. The tightening screw and ...

AI Technical Summary

Problems solved by technology

[0009] However, the structure of this pre-tightening and clamping milling cutter bar has many parts, at least three parts of spring, steel ball and retaining ring are needed. If the number of milling cutter bars is 24, a total of 24 springs, 24 steel balls and 24 retaining rings, compared with traditional cutting tools, there will be 72 more scattered parts, which is very inconvenient to assemble. Moreover, because the spring hole needs to have a certain depth, in order to avoid the locking screw, on the pressing block It can only be in the upper position, which will lead to uneven force on the blade in the pre-tightened state, making it difficult to achieve the ideal pre-tightening effect

Images