Linear module, machining method and machining devices applied to machining method

Abstract

A linear module comprises a shell, a left end cover and a right end cover, a linear guide rail is installed in the shell, a sliding block is installed on the linear guide rail in a matched mode, a ball screw is arranged in the shell and provided with a ball screw nut connected to the sliding block, a bearing is arranged on the inner end face of the left end cover, one end of the ball screw is installed on the bearing, a coupler is installed at the right end of the shell, the other end of the ball screw is connected to the coupler, the right end face of the coupler is attached to the right end cover, the right end cover is provided with a through hole corresponding to the coupler, a circle of installing groove used for installation of a motor is formed in the outer end face of the through hole, locating grooves are formed in the installing groove at intervals, each locating groove is internally provided with a motor installing hole, the right end face of the coupler is provided with threaded holes corresponding to the motor installing holes, and the coupler is provided with a locating ring clamped into the through hole. The ball screw nut and the ball screw in the linear module are machined by cooperation of a designed clamp, a grinding device and a center hole grinding device.

Description

technical field [0001] The invention relates to a linear module and related devices for processing lead screws and lead screw nuts, such as a center hole grinding device for lead rods and an internal thread grinding device for lead screw nuts. Background technique [0002] At present, a linear module refers to a general term for devices capable of linear motion in the field of automation industry, also known as a positioning module. The structure of the linear module is mainly composed of a base, a linear guide rail, a ball screw and a sliding seat; the base is generally a long ferrous body with a U-shaped cross section, and the two ends of the length direction are end covers; the ball wire The two ends of the screw in the bar are supported on the supporting end plates at both ends of the base, and linear guide rails are symmetrically arranged on both sides of the screw on the base, and the sliding seat is slidingly connected with the base through the linear guide rails; whi...

AI Technical Summary

Problems solved by technology

However, there are still some shortcomings in the linear module: 1. The ball screw nut is very important for the sliding stability control of the linear module, especially the internal thread accuracy of the ball screw nut is to control the sliding of the ball. If the surface of the internal thread is not smooth , it will cause the ball to vibrate and affect the stability of the sliding seat; 2. The coaxiality of the ball screw and the motor connection, once the coaxiality deviation is large, will seriously affect the stability of the motor-driven ball screw; 3. The installation is more troublesome. Especially the installation of the end cover, as well as the connection between the motor and the ball screw, one end of the base must be provided with a fixed seat for fixing the special motor; 4. The top of the base is open, the screw of the ball screw is exposed, and there is oil on the screw. Contaminated with dust or fine debris, affecting the movement accuracy

To prevent dust, the usual method is to install an organ-type dust cover, and the organ-type dust cover will make noise during operation, especially in the case of high-speed operation, which will cause serious noise problems; The dust cover is also easy to break and the service life is not long

[0003] However, the cause of the above disadvantage 1 is mainly the grinding machine for the internal thread processing of the ball screw nut. For the internal thread processing of the ball screw nut, high precision is required, and the grinding machine is often used for rough machining and finishing of the internal thread. Multi-program processing, but in the existing technology, the processing accuracy is mainly affected by the two factors of motor vibration and grinding wheel wear. Motor vibration often makes some joints with clearance fits produce loud vibrations, such as the cooperation between guide rails and sliding seats. ;Wearing of the grinding wheel will lead to deformation of the grinding wheel, resulting in deviation of positioning, so the grinding wheel needs to be regularly corrected and processed during use, which will reduce work efficiency

[0004] For the reasons for the above disadvantage 2: one is that the center hole position error at both ends of the ball screw is large, and the other is that the installation error between the ball screw and the motor output shaft is large; however, for the processing of the ball screw, the two ends of the ball screw The center hole is generally processed by a lathe or a drilling machine, and the position error of the center hole is relatively large

In the prior art, it is also specially used for processing the center hole of the screw, such as the special drilling machine for the center hole with the patent No. 201020125389. Drilling the center hole, the device has many problems, the structure is to fix the workpiece horizontally, and only one end of the workpiece can be fixed, so there will be a large error in the positioning of the workpiece, and the stability of the fixation is poor. At the same time, the center hole of the workpiece will be affected by the external Due to the influence of surface errors, it is difficult to meet the requirements of high-precision center hole processing

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