CN103144033A - Grinding wheel centering device with detection function - Google Patents

Abstract

A grinding wheel centering device with detection function relates to the centering device used for grinding wheels. An angle measurement module, a micro-adjustment module, a laser displacement sensor module, and a base are set; the angle measurement module is equipped with an encoder, a shaft coupling, an encoder box, a grinding wheel lock nut sleeve, and an angle measurement bracket; the micro-adjustment module is equipped with a micro-adjustment box Body, dial indicator bracket, dial indicator and micro-adjustment bracket, the micro-adjustment box is provided with an adjustment worm, an adjustment rod, a worm wheel, a box locking bolt, a lower box, an upper box and steel balls, and the laser displacement The sensor module is equipped with a sensor bracket and a sensor; through the mutual cooperation of the angle measurement module and the laser displacement sensor module, the contour error of the grinding wheel surface can be obtained, and the eccentricity and eccentricity angle of the grinding wheel can be accurately calculated according to the surface contour error of the grinding wheel; The adjustment module adjusts the position of the grinding wheel relative to the spindle. It can improve the processing accuracy of the precision grinding machine, improve the dressing efficiency of the grinding wheel, and prolong the service life of the grinding wheel.

Description

A grinding wheel centering device with detection function

technical field

The invention relates to a centering device for a grinding wheel, in particular to a centering device for a grinding wheel with a detection function.

Background technique

Precision and ultra-precision machining is one of the important symbols of a country's manufacturing level, and is the foundation and key of advanced manufacturing. Since grinding is an important part of it, it is often used as the final finishing method in machining. Grinding is cutting through many tiny cutting edges on the abrasive grains of the grinding wheel, so the machining accuracy is high. Moreover, the grinding wheel is a multi-edge tool, and there are many cutting edges involved in cutting at the same time. Although the cutting amount of a single cutting edge is small, the overall processing efficiency is still considerable.

Before the grinding process, the grinding wheel usually needs to be trimmed to ensure that the surface quality of the grinding wheel meets the processing requirements; but if there is a certain eccentricity when the grinding wheel is installed, it is necessary to increase the dressing amount of the grinding wheel to meet the processing requirements, which not only affects It reduces the efficiency of grinding wheel dressing and affects the service life of grinding wheel. Therefore, the position of the grinding wheel needs to be adjusted when the grinding wheel is installed, so that the center of the grinding wheel and the center of rotation of the spindle have a better coaxiality.

At present, the basic method of grinding wheel alignment is to measure the rotating grinding wheel with a laser displacement sensor, roughly judge the eccentricity of the grinding wheel according to the information of a single point on the grinding wheel profile measured by the laser displacement sensor, and then adjust the position of the grinding wheel. This alignment method only determines the eccentric direction and eccentric distance of the grinding wheel based on the information of individual points on the grinding wheel, and cannot accurately judge the eccentricity of the grinding wheel. The adjustment basically depends on personal experience. Generally, only skilled technicians can complete it well, and the operation is difficult. Big and time consuming. At the same time, when there are large defects on the local surface of the grinding wheel, the operator is easy to make wrong judgments.

Chinese patent CN102490118A discloses a wedge-type adjustable diamond grinding wheel fixture that can improve the machining accuracy of a precision grinding machine and prolong the service life of the diamond grinding wheel. Equipped with inner cone flange, grinding wheel flange, flange screw and wedge aligning device; the inner cone flange is sleeved on the main shaft of the external grinding machine, and the grinding wheel flange and inner cone flange are fixedly connected by flange screws; the wedge The centering device is equipped with 3 identical wedges, 3 adjusting screws, and adjusting screw cover, and each wedge is evenly distributed between the inner cone flange and the grinding wheel flange, and is connected with the inner cone flange and the grinding wheel flange. The inclined surface fits, and each wedge is screwed with one end of an adjusting screw, and the other end of the adjusting screw is located in the adjusting screw through hole of the grinding wheel flange, and the adjusting screw cover is fixed on the grinding wheel flange and presses against the end face of the adjusting screw. It has the advantages of convenient installation and disassembly, no need for skilled technicians, simple and fast operation, etc.

Chinese patent CN102825549A discloses a self-aligning roller bearing outer spherical grinding wheel dresser, the machine base is connected with the grinding machine workbench, the swing rod seat is installed on the machine base, and is fixed by bolts, and the swing rod shaft is installed on the ground by two sets of bearings. On the swing rod seat, the oil cylinder consists of a cylinder body, a piston rod and a piston. The piston rod and the piston are located inside the cylinder body. Pistons are installed on both sides of the piston rod. The rod passes through the round hole on the joint and is fixed by a pin. It is simple in structure, easy to use, and can eliminate the influence of human factors, improve product precision and production efficiency, reduce labor intensity of workers, and save the consumption of grinding wheels and diamond pens. .

Contents of the invention

The purpose of the present invention is to solve the problems of blindness, randomness, inaccuracy and cumbersome operation process of the traditional grinding wheel aligning method, and provide a grinding wheel aligning device with a detection function.

The invention is provided with an angle measurement module, a micro-adjustment module, a laser displacement sensor module, and a base;

The angle measurement module is used to measure the angle of rotation of the grinding wheel. The angle measurement module is provided with an encoder, a shaft coupling, an encoder box, a grinding wheel lock nut sleeve and an angle measurement bracket. The encoder and the grinding wheel lock nut The sleeve is installed on the encoder box, the encoder and the grinding wheel lock nut sleeve are connected through a coupling, and the encoder box is fixed on the angle measurement bracket; the micro-adjustment module is used to micro-adjust the grinding wheel relative to the main shaft. position, the micro-adjustment module is provided with a micro-adjustment box, a dial gauge bracket, a dial gauge and a micro-adjustment bracket, the dial gauge is connected to the dial gauge bracket and locked by the bracket locking knob, and the dial gauge bracket is installed On the micro-adjustment box, the micro-adjustment box is fixed on the micro-adjustment bracket through the box fixing bolts. There are a pair of micro-adjustment box, dial indicator bracket, and dial indicator, which are symmetrically distributed from left to right. The micro-adjustment box The body is equipped with an adjusting worm, an adjusting rod, a worm wheel (with helicoid), a box locking bolt, a lower box, an upper box and steel balls, the adjusting worm and the worm wheel are fixed between the lower box and the upper box, and the adjusting rod is embedded In the upper box, the steel ball is clamped between the helical surface of the worm wheel and the adjustment rod; the laser displacement sensor module is provided with a sensor bracket and a sensor; the angle measurement module is fixed on the base through the angle measurement bracket, and the micro adjustment The bracket is fixed on the base, and the laser displacement sensor module is fixed on the base through the sensor bracket.

The invention obtains the contour error of the grinding wheel surface through the mutual cooperation of the angle measurement module and the laser displacement sensor module, and can accurately calculate the eccentric distance and eccentric angle of the grinding wheel according to the surface contour error of the grinding wheel; The position of the main shaft is used to improve the coaxiality of the grinding wheel and the main shaft, thereby reducing the dressing amount of the grinding wheel and improving the machining accuracy of the grinding wheel. The invention can realize the accurate detection of the eccentricity of the grinding wheel and the precise adjustment of the coaxiality between the grinding wheel and the main shaft of the grinding machine, thereby improving the processing precision of the precision grinding machine, improving the dressing efficiency of the grinding wheel and prolonging the service life of the grinding wheel.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention.

FIG. 2 is a schematic diagram of an angle measurement module according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of a micro-adjustment module according to an embodiment of the present invention.

Fig. 4 is a top view of the fine adjustment box according to the embodiment of the present invention.

Fig. 5 is a rear view of the fine adjustment box according to the embodiment of the present invention.

Fig. 6 is a schematic side view of the installation of the embodiment of the present invention.

Fig. 7 is a front view of an installation diagram of an embodiment of the present invention.

Detailed ways

Referring to FIGS. 1-7 , the embodiment of the present invention is provided with an angle measurement module, a fine adjustment module, a laser displacement sensor module, and a base 6 . Described angle measurement module is used for measuring the angle that emery wheel rotates, and angle measurement module is provided with encoder 13, shaft coupling 15, encoder casing 12, emery wheel lock nut sleeve 11 and angle measurement support 10, and described encoder 13 and the grinding wheel lock nut sleeve 11 are installed on the encoder casing 12, the encoder 13 and the grinding wheel lock nut sleeve 11 are connected by a shaft coupling 15, and the encoder casing 12 is fixed on the angle measurement bracket 10; The micro-adjustment module is used to micro-adjust the position of the grinding wheel relative to the main shaft. The sub-meter bracket 2 is connected and locked by the bracket locking knob 9. The dial indicator bracket 2 is installed on the micro-adjustment box 1, and the micro-adjustment box 1 is fixed on the micro-adjustment bracket 4 by the box fixing bolt 1-1. There is a pair of micro-adjustment box body 1, dial indicator support 2, and dial indicator 3, which are distributed symmetrically. (with helical surface), box locking bolts 1-5, lower box 1-6, upper box 1-7 and steel ball 1-8, adjusting worm 1-2 and worm gear 1-4 fixed on lower box 1- 6 and the upper box body 1-7, the adjustment rod 1-3 is embedded in the upper box body 1-7, and the steel ball 1-8 is clamped between the spiral surface of the worm wheel 1-4 and the adjustment rod 1-3; The laser displacement sensor module is provided with a sensor bracket 7 and a sensor 8; the angle measurement module is fixed on the base 6 through the angle measurement bracket 10, the micro-adjustment module is fixed on the base 6 through the micro-adjustment bracket 4, and the laser displacement sensor module is fixed through the sensor bracket 7 on base 6.

During use, the present invention is placed on the grinding machine workbench 19, and the emery wheel centering device is fixed on the workbench by the electromagnet on the workbench 19. Grinding wheel 18 is installed on the flange plate 17, and flange plate 17 is installed on the grinding head main shaft 16, because there is gap between flange plate 17 and grinder main shaft 16, so just can adjust flange plate 17 relative to grinding machine main shaft 16 The relative position of the grinding wheel 18 and the grinding machine main shaft 16 can be adjusted in a small amount. Before testing, first determine the eccentric direction and eccentric distance of the grinding wheel. The basic steps are: pre-tighten the grinding wheel so that the grinding wheel can move slightly under a certain action, and at the same time, when the grinding wheel rotates, it will not deviate. Then, place the grinding wheel centering device on the grinding machine table 19, adjust the position of the centering device so that the laser displacement sensor 8 is facing the grinding wheel 18, power on the electromagnet on the grinding machine table 19, and fix the centering device on the working table. on the platform 19; adjust the angle measuring bracket 10, so that the grinding wheel set nut sleeve 11 is sleeved on the grinding wheel set nut 20; make the grinding wheel rotate, extract the information on the laser displacement sensor 8 and the encoder 13; measure with the encoder 13 The obtained angle is the abscissa, and the distance of the laser displacement sensor 8 is the ordinate, the surface profile information of the grinding wheel can be obtained, the error curve of the grinding wheel profile can be fitted by the least square method, and the eccentric direction and the Eccentricity. According to the eccentricity of the grinding wheel, the adjustment amounts of the two sets of fine-tuning boxes 1 can be respectively determined by using the trigonometric function relationship and the geometric relationship between the fine-tuning box 1 and the grinding wheel.

Before adjustment, adjust the position of the dial gauge 3 on the dial gauge bracket 2, so that the contact of the dial gauge 3 just rests on the flange 17, and rotate and adjust the worm 1-2, so that the adjustment rod 1-3 is on top of the flange 17. On the flange 17 and make the flange 17 move slightly, the dial gauge 3 is used to accurately measure the offset of the flange. The micro-adjustment of the position of the grinding wheel can be realized through the micro-adjustment module.

The angle measurement module is used to measure the rotation angle of the grinding wheel, and it cooperates with the laser displacement sensor module to obtain the data provided by the profile of the grinding wheel.

The micro-adjustment module is used to slightly adjust the position of the grinding wheel flange 17 relative to the grinding machine main shaft 16, which can improve the coaxiality of the grinding wheel and the grinding machine main shaft.

Referring to Figures 6 and 7, before performing the centering of the grinding wheel, it is necessary to measure the profile of the grinding wheel to obtain the surface profile of the grinding wheel. below. The angle measurement module is sleeved on the grinding wheel set nut 20 . Through the cooperation of the laser sensor 8 and the encoder 13, the surface profile of the grinding wheel can be obtained, and the eccentricity of the grinding wheel can be obtained through processing. The micro-adjustment module can adjust the position of the flange 17 relative to the main shaft 16 of the grinding machine, and improve the coaxiality of the grinding wheel 18 and the main shaft 16 of the grinding machine. The eccentricity of the grinding wheel can be accurately determined through the centering device of the grinding wheel involved in the invention, and the coaxiality of the grinding wheel and the main shaft of the grinding head can be precisely adjusted. The invention integrates measurement and adjustment, is convenient to use, has high precision, and has remarkable effects on improving the grinding wheel dressing efficiency and prolonging the service life of the grinding wheel.

Claims (1)

1. the emery wheel aligning device with measuring ability, is characterized in that being provided with Angle Measurement Module, inching module, laser displacement sensor module, base;

described Angle Measurement Module is used for measuring the angle of emery wheel rotation, Angle Measurement Module is provided with encoder, shaft coupling, encoder casing, emery wheel locking nut sleeve and angular surveying support, described encoder and emery wheel locking nut sleeve are arranged on the encoder casing, encoder is connected by shaft coupling with emery wheel locking nut sleeve, and the encoder casing is fixed on the angular surveying support, described inching module is used for trace and adjusts emery wheel with respect to the position of main shaft, the inching module is provided with the inching casing, dial indicators rack, amesdial and inching support, described amesdial is connected with dial indicators rack and is tight by support locking knob lock, dial indicators rack is arranged on the inching casing, the inching casing is fixed on the inching support by the casing set bolt, the inching casing, dial indicators rack, amesdial all has a pair of, become left-right symmetry to distribute, described inching casing is provided with adjusts worm screw, adjusting lever, worm gear, the casing clamping screw, lower box, upper box and steel ball, adjusting worm and worm wheel is fixed between lower box and upper box, adjusting lever is embedded in upper box, steel ball is clipped between the helicoid and adjusting lever of worm gear, described laser displacement sensor module is provided with sensor stand and sensor, Angle Measurement Module is fixed on base by the angular surveying support, and the inching module is fixed on base by the inching support, and the laser displacement sensor module is fixed on base by sensor stand.

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