CN1428225A - Grinding bed dresser - Google Patents

Abstract

The invention relates to a dresser for a grinding wheel of an outer cylindrical grinder, which includes a dressing tool, a base and a numerical control system. The base is installed on the workbench of the grinding machine, and a turntable is arranged on the base. The numerical control system controls the servo motor A to drive the turntable to rotate, and the dressing tool is installed on the turntable. Above, the dressing tool directly dresses the grinding wheel, and the arc center of the cutting edge falls on the rotation axis of the turntable, because the dressing tool of the present invention can move back and forth, left and right relative to the grinding wheel, and can move around the arc center of the dressing tool edge Rotation, so the present invention can accurately trim grinding wheels of various curved surfaces. In addition, the present invention has simple structure, convenient manufacture, low cost, high efficiency, and easy realization of numerical control programming.

Description

Grinding wheel dresser

Technical field

The invention relates to a grinding wheel dresser, in particular to a grinding wheel dresser for an outer cylindrical grinding machine.

Background technique

Grinding machine is a common mechanical processing equipment. In addition to grinding the surface of the workpiece, it can also process grooves and curved surfaces on the workpiece. When the grinding machine is processing the workpiece, the grinding wheel will wear out. Therefore, after the grinding wheel is used for a certain period of time, the grinding wheel must be trimmed with the help of a grinding wheel dresser, so that the grinding wheel can regain the shape accuracy and sharpness of the surface. There are two main types of grinding wheel dressers for profile grinding, one is mechanical grinding wheel dresser, which uses a prefabricated mold that is the same as the workpiece to be processed, that is, a diamond forming dressing roller, or a mechanical mechanism to make the dresser The dressing pen produces the required motion track to dress the forming grinding wheel that meets the requirements of the workpiece. The other kind is the numerical control grinding wheel dresser, and it is to control the dressing pen or the diamond dressing wheel motion locus to dress the grinding wheel by programming the application program, but the dressing pen or the diamond dressing wheel of these existing grinding wheel dressers can only be used when dressing the grinding wheel. It can rely on the worktable of the grinder to move back and forth, left and right relative to the grinding wheel, that is, the dressing tool can only move along the x and y axes with the worktable of the grinder. When these dressers dress the sharper grinding wheel forming surface as shown in Figure 1, the dressing pen or dressing wheel will interfere with the grinding wheel near the left end point, which will seriously affect the dressing accuracy or cannot be dressed at all. Therefore, it is provided A grinding wheel dresser capable of dressing various complex molding surfaces has been a long-standing problem in the industry.

Contents of invention

The object of the present invention is to overcome the shortcomings in the prior art and provide a numerically controlled grinding wheel dresser capable of dressing various complex molding surfaces.

The present invention is achieved through the following technical solutions: a grinding wheel dresser for grinding machines, including a dressing tool, a base and a numerical control system, characterized in that the base is installed on the workbench of the grinding machine, and a turntable is arranged on the base, controlled by the numerical control system The servo motor A drives the turntable to rotate, the dressing tool is installed on the turntable, and the dressing tool directly dresses the grinding wheel, and the arc center of the cutting edge falls on the rotation axis of the turntable.

The dressing tool is a dressing pen or a diamond dressing wheel.

The base has a transverse groove parallel to the plane of the grinder workbench, a worm gear mechanism is arranged in the groove, the worm is driven by the motor A, and the rotating shaft of the worm gear is the same rotating shaft as the rotating shaft of the turntable above the base.

The rotation of the diamond dressing wheel on the turntable is driven by the motor B through the transmission mechanism.

The transmission mechanism is gear transmission or belt transmission.

The nib of the trimming pen is made of diamond or the cutter head of a cutting wheel.

Since the dressing tool of the present invention can move back, forth, left, and right relative to the grinding wheel, and can rotate around the arc center of the cutting edge of the dressing tool, the present invention can accurately dress grinding wheels of various curved surfaces. In addition, the present invention is simple in structure, convenient to manufacture, and low in cost. High efficiency, easy to implement CNC programming.

Description of drawings

Fig. 1 is a schematic diagram of the interference between the dressing pen and the grinding wheel near the left end point when the existing dresser is trimming the sharper grinding wheel forming surface;

Fig. 2 is a schematic diagram showing that the dressing wheel of the present invention is symmetrical to the axis normal plane C of the dressing wheel and the normal line D of the grinding wheel section curve at the dressing point as far as possible;

Fig. 3 is one of the schematic diagrams of the positions of the dressing wheel and the grinding wheel when the dressing wheel of the present invention is dressing the grinding wheel;

Fig. 4 is the second schematic diagram of the position of the dressing wheel and the grinding wheel when the dressing wheel of the present invention is dressing the grinding wheel;

Fig. 5 is a structural representation of the present invention;

FIG. 6 is a schematic view of the top view of FIG. 5 .

1. Grinding wheel, 2. Dressing pen, 3. Diamond dressing wheel, 4. Grinder table, 5. Dresser base, 6. Turntable, 7. Worm wheel, 8. Worm, 9. Motor A, 10. Motor B, 11 .Dressing wheel transmission mechanism, 12. Dressing point, 13. Rotary axis of turntable, 14. Grinding machine bed, 15. Grinding wheel base, C. Dressing wheel is symmetrical to the normal plane of the dressing wheel axis, D. Cross-sectional curve of the grinding wheel at the dressing point normals.

Detailed ways

With reference to Fig. 5,6, trimmer of the present invention is made of trimming pen 2 or diamond trimming wheel 3 and base 5, and trimmer base 5 is installed on grinder workbench 4 and can clamp on the workbench of processing workpiece. The grinding machine table 4 can move left and right in the y direction on the grinding machine bed 14, and the grinding wheel base 15 can move forward and backward in the x direction on the grinding machine bed. A turntable 6 is provided above the dresser base 5, and the front end of the base is provided with a groove parallel to the plane of the grinder workbench near the grinding wheel end. The groove is provided with a worm wheel 7 and a worm screw 8, and the worm wheel is driven by a motor A9. The worm 8 drives the worm wheel to rotate, and the rotating shaft 13 of the worm wheel is the rotating shaft of the turntable 6. In this way, the turntable is driven to rotate by the motor A, and the rotation angle of the motor A is controlled by the numerical control system. A clamping device can be directly installed on the turntable to clamp the trimming pen 2 or install the diamond dressing wheel 3, if the dressing tool is a diamond dressing wheel, it must be driven by the motor B10 through the transmission mechanism. In this dresser, the dressing tool installed on the turntable must ensure that the center of the arc of the cutting edge falls on the rotation axis of the turntable. When the cutting edge of the dressing tool is ideally sharp, that is, the radius of the cutting edge arc When it is zero, the dressing point 12 where the dressing tool is in contact with the grinding wheel falls directly on the axis of rotation of the turntable.

In the grinding wheel dresser of the present invention, the base is installed on the grinding machine table, because the grinding machine table can move in the y direction, and at the same time, the grinding wheel base can move forward and backward in x. Therefore, the base of the dresser itself can realize the x, y axis relative to the grinding wheel, that is, the front, rear, left, and right movements. Because a turntable is installed on the base of the dresser, the dressing tool of the dresser, that is, the dressing pen or the diamond dressing wheel, is actually Two moving axes and one rotating axis can be linked with three axes around the Z axis relative to the surface of the grinding wheel, so that the axis of the dressing pen or the dressing wheel is symmetrical to the normal surface C of the axis of the dressing wheel and the normal line D of the cross-sectional curve of the grinding wheel at the dressing point as much as possible Parallel to ensure that the dressing tool does not interfere with the grinding wheel. The gist of the present invention is to control the movement trajectory of the arc center of the dressing tool cutting edge. When the cutting edge of the dressing tool is in an ideal sharp state, that is, when the radius of the cutting edge arc is zero, it is the dressing that controls the contact between the dressing tool and the grinding wheel. The point motion trajectory, that is, the horizontal projection of the motion trajectory of the trimming point when the control arc center or cutting edge is in an ideal sharp state must coincide with the horizontal projection of the motion trajectory of the turntable axis line. The worm gear mechanism of the turntable is driven by the servo motor A9. When the angle of rotation of the worm wheel is controlled by numerical control programming, the turntable fixed on the shaft of the worm wheel will also rotate at the same angle accordingly, so that the axis of the dressing pen or the dressing wheel is symmetrical to that of the dressing wheel. The axis normal surface tracks the normal direction of the grinding wheel section, and the dressing tool rotates around the arc center of the cutting edge. The advantage is that when NC programming, the influence of the rotation around the rotation axis on the two moving axes can be ignored, and the programming is easy to implement.

Claims (6)

1. grinder wheel trimmer, comprise dressing tool, base and digital control system, it is characterized in that: said base is installed on the Grinder bench, be provided with a rotating disk above the base, digital control system control servomotor A drives dial rotation, dressing tool is installed on the rotating disk, the direct trimming wheel of dressing tool, and the circular arc center of circle of its cutting edge is dropped on the rotational axis line of rotating disk.

2. dresser according to claim 1 is characterized in that described dressing tool is finishing pen or diamond dressing wheel.

3. dresser according to claim 1, it is characterized in that described base has and the parallel plane translot of Grinder bench, be provided with a worm-and-wheel gear in the groove, worm screw is driven by motor A, the turning cylinder of worm gear and above the base turning cylinder of rotating disk be same rotating shaft.

4. dresser according to claim 2 is characterized in that the rotation of the diamond dressing wheel on the described rotating disk is driven through transmission mechanism by motor B.

5. dresser according to claim 4 is characterized in that described transmission mechanism is gear drive or belt transmission.

6. dresser according to claim 2 is characterized in that a described finishing nib made or cut the cutter head of emery wheel and make by diamond.

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