Chain knife gear processing CNC machine tool

Abstract

The invention discloses a numerical control machine tool for machining a chain knife gear. The numerical control machine tool comprises an machine base, a rotary table indexing transmission mechanism,a power transmission cutting mechanism, a pressing fixing mechanism and a platform sliding mechanism, the power transmission cutting mechanism is arranged at one end of the upper surface of the machine base, the platform sliding mechanism is arranged above the upper surface groove of the machine base, the platform sliding mechanism is connected with the rotary table indexing transmission mechanism, the two side edges of the sliding table of the platform sliding mechanism are respectively connected with the inner side surfaces of the two bottom edges of the portal frame of the pressing fixingmechanism, and the pressing fixer of the pressing and fixing mechanism is located above the rotary table. The invention provides a novel gear machining mode, a plurality of gears can be simultaneouslymachined at one time, the time for assembling the gear blanks for a plurality of times is effectively reduced, so that the production efficiency is improved; by means of the novel rotary table indexing transmission mechanism, accurate rotation of gears is effectively realized, so that the tolerance between each machined gear is small, the machining precision of gears can be effectively improved,and the production cost of gears is reduced.

Description

technical field [0001] The invention relates to the technical field of gear forming processing machine tools, in particular to a chain knife gear processing numerical control machine tool. Background technique [0002] Gears are important transmission components in mechanical devices, and they are widely used in various mechanical transmission mechanisms. At present, the existing gear processing can be divided into two categories: non-cutting and cutting. Processing includes hot-rolled gears, cold-rolled gears, precision forging, powder metallurgy and other processes. Non-cutting processing has the advantages of less material consumption, low cost, and high production efficiency. Cutting processing is still the current gear because of its good processing accuracy. The main processing technology of the shape can be divided into forming method and generating method according to its processing principle. The forming method is to use a tool that is consistent with the shape of t...

AI Technical Summary

Problems solved by technology

[0002] Gears are important transmission components in mechanical devices, and they are widely used in various mechanical transmission mechanisms. At present, the existing gear processing can be divided into two categories: non-cutting and cutting. Processing includes hot-rolled gears, cold-rolled gears, precision forging, powder metallurgy and other processes. Non-cutting processing has the advantages of less material consumption, low cost, and high production efficiency. Cutting processing is still the current gear because of its good processing accuracy. The main processing technology of the shape can be divided into forming method and generating method according to its processing principle. The forming method is to use a tool that is consistent with the shape of the tooth groove end face of the processed gear to process the tooth surface on the tooth blank. Such as milling teeth on a milling machine with a gear milling cutter, grinding teeth with a forming grinding wheel, and pulling teeth with a gear broach. These processing methods do not require special equipment, so the tool cost is low, but these processing methods are due to their The indexing error and the installation error of the tool, the production efficiency is not high, and the machining accuracy is low. Generally, it can only process gears with 9-11 precision. Generally, it is mostly used for repairing and processing single pieces. The speed is not high and the accuracy is required. The lower gear; the generation method, also known as the Fancheng method, uses the meshing principle of the gear, and uses the meshing motion of the gear tool and the tooth blank to cut out the tooth shape, that is, one of the gear pairs is made into a tool, and the other is used as a workpiece. , and force the tool and the workpiece to perform strict meshing motions to develop the cut tooth profile. This gear cutting method has high production efficiency and high machining accuracy. When machining gears, as long as the modulus and pressure angle of the tool and the processed gear are equal, no The number of teeth of the gear to be processed can be processed with the same tool, which brings great convenience to production. Its application is very smooth. The methods of processing tooth shapes through the principle of generation include gear hobbing, gear shaping, shaving, Gear hobbing, gear grinding and other methods are the most commonly used gear forming methods. It has the advantages of strong versatility and fast speed, but only one piece can be processed at a time, which leads to clamping for each piece processed It takes a lot of clamping time to remove it; although the gear shaping precision is high, the processing speed is slow; the planing gear is generally only used in the processing of super large workpieces, and the processing speed is slow.

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