Centrifugal positioning machining device of internal grinding machine

Abstract

The utility model discloses an internal grinding machine centrifugal positioning machining device which comprises a spindle vertical plate, an electromagnetic spindle is arranged in the center of the spindle vertical plate, an electromagnetic chuck is arranged at the front end of the electromagnetic spindle, an annular workpiece corresponds to the front end of the electromagnetic chuck, the spindle vertical plate is arranged on the front end face of the electromagnetic spindle, and a right-angle positioning block is arranged on the spindle vertical plate. A tool support is further arranged on the main shaft vertical plate, the outer side of the tool support is in contact positioning with the right-angle positioning block, the arc face of the inner side of the tool support is in contact positioning with the outer circle of the annular workpiece, and a grinding wheel is installed at the front end of the grinding head.

Description

Technical Field

[0001] The utility model relates to the field of mechanical manufacturing, in particular to a finishing device for an annular workpiece. Background Art

[0002] When processing annular workpieces on traditional internal cylindrical grinders, each time the tooling bracket is replaced or adjusted, a lot of time is needed to adjust the position. The workpiece must be trial-grinded to confirm whether the adjustment is appropriate, which greatly increases the auxiliary time for production. In addition, the roundness and coaxiality of the workpiece that has been trial-grinded and adjusted will also have batch deviations after processing. Utility Model Content

[0003] In order to solve the above problems, the utility model discloses a centrifugal positioning processing device for an internal grinding machine.

[0004] The specific technical solutions are as follows:

[0005] A centrifugal positioning processing device for an internal cylindrical grinder comprises a spindle vertical plate, an electromagnetic spindle is provided at the center of the spindle vertical plate, an electromagnetic chuck is provided at the front end of the electromagnetic spindle, an annular workpiece corresponds to the front end of the electromagnetic chuck, the spindle vertical plate is arranged on the front end surface of the electromagnetic spindle, a right-angle positioning block is provided on the spindle vertical plate, a tooling bracket is also provided on the spindle vertical plate, the outer side of the tooling bracket contacts with the right-angle positioning block for positioning, the inner arc surface of the tooling bracket contacts with the outer circle of the annular workpiece for positioning, and a grinding wheel is installed at the front end of the grinding head.

[0006] The right-angle positioning block is provided with a ball head screw, and the end of the ball head screw abuts against the outer side surface of the tooling bracket.

[0007] The center of the inner arc of the tooling bracket does not coincide with the center of the electromagnetic spindle.

[0008] The end surface of the electromagnetic chuck is a self-grinding plane, and the end surface of the annular workpiece is adsorbed on the end surface of the electromagnetic chuck by magnetic force.

[0009] The electromagnetic spindle rotates clockwise, and the arc center of the tooling bracket is located at the upper right of the electromagnetic spindle.

[0010] The utility model has the advantages that: there is no need to install a chuck to clamp the workpiece for positioning, the end face of the workpiece is attracted by electromagnetic force, and the centrifugal force generated by the rotation of the main shaft is used to fix the annular workpiece on the tooling bracket, so that the roundness and coaxiality of the processed product are higher.

[0011] A grinding wheel with a cylindrical outer circle is installed on the grinding head. The high-speed rotating grinding wheel enters the inside of the annular workpiece, moves to the position of the tooling bracket and processes the workpiece. The workpiece rotates itself and oscillates axially with the grinding wheel, so that the wall thickness of the workpiece is more uniform.

[0012] The right-angle positioning block is installed on the spindle vertical plate. The position of the tooling bracket can be adjusted through the ball head screw. The initial fixed position of the annular workpiece can be adjusted based on the different positions of the adjustment bracket. The rotation radius and rotation trajectory of the annular workpiece can be determined by the distance between the annular workpiece and the center of the electromagnetic spindle, so that the electromagnetic spindle can give the annular workpiece appropriate centrifugal force when rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is the front view of the utility model;

[0015] Figure 3 It is a schematic diagram of the right-angle positioning block and electromagnetic chuck structure. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] A centrifugal positioning processing device for an internal cylindrical grinder comprises a spindle vertical plate 1, wherein the spindle vertical plate 1 is mounted on the grinding machine bed, an electromagnetic spindle 6 is provided at the center of the spindle vertical plate 1, an electromagnetic chuck 2 is provided at the front end of the electromagnetic spindle 6, an annular workpiece 3 corresponds to the front end of the electromagnetic chuck 2, the electromagnetic chuck 2 is fixed to the front end of the electromagnetic spindle 6 by screws, the spindle vertical plate 1 is arranged on the front end surface of the electromagnetic spindle 6, a right-angle positioning block 5 is provided on the spindle vertical plate 1, a tooling bracket 4 is also provided on the spindle vertical plate 1, the outer side of the tooling bracket 4 is in contact with the end of the ball head top screw 10 on the right-angle positioning block 5 for positioning, the inner arc surface of the tooling bracket 4 is in contact with the outer circle of the annular workpiece 3 for positioning, and a grinding wheel 7 is installed at the front end of the grinding head 8.

[0018] The right-angle positioning block 5 is provided with a ball head screw 10 , and the end of the ball head screw 10 abuts against the outer side surface of the tooling bracket 4 .

[0019] The center of the inner arc of the fixture bracket 4 does not coincide with the center of the electromagnetic spindle. Figure 2 A.

[0020] The end surface of the electromagnetic chuck 2 is a self-grinding plane, and the end surface of the annular workpiece 3 is adsorbed on the end surface of the electromagnetic chuck 2 by magnetic force.

[0021] The electromagnetic spindle 6 rotates clockwise, and the arc center of the tooling bracket 4 is located at the upper right corner of the electromagnetic spindle, that is, the vertical and horizontal center lines of the electromagnetic spindle constitute a four-quadrant plane coordinate, and the arc center of the tooling bracket is located in the first quadrant of the plane coordinate formed by the electromagnetic spindle. Since the rotation direction of the grinding wheel during operation is also clockwise as that of the electromagnetic spindle, when the electromagnetic spindle drops the annular workpiece on the tooling bracket through the action of centrifugation, the annular workpiece is subjected to force to form a tight contact with the inner arc surface of the tooling bracket and there is prestress. When the grinding wheel extends toward the inner circle of the annular workpiece, the grinding wheel also further provides prestress to the annular workpiece. In the process of inner circle grinding, the inner and outer sides of the wall of the annular workpiece are the inner arc surfaces of the grinding wheel and the tooling bracket respectively. The grinding wheel continuously moves in the direction of the inner arc surface of the tooling bracket, which can hold the annular workpiece tightly to ensure the processing accuracy.

[0022] The working principle of the utility model is as follows: the annular workpiece 3 is positioned by the electromagnetic chuck 2 and the fixture bracket 4, the annular workpiece 3 and the electromagnetic spindle 6 are eccentrically arranged, the position of the annular workpiece 3 is arranged at the upper right of the electromagnetic spindle 6, the annular workpiece 3 uses the tangential force generated when the electromagnetic spindle 6 rotates, the direction is the direction of the fixture bracket 4, so that the annular workpiece 3 will be thrown onto the fixture bracket 4 and stably fixed, the grinding head 8 is installed on the bed slide, and can be controlled by the servo motor to move in the X and Y directions (such as Figure 2 As shown), a grinding wheel 7 is installed at the front end of the grinding head 8, and the grinding wheel 7 rotates and moves on the bed slide to the inner hole of the annular workpiece 3. The grinding wheel 7 rotates and oscillates while moving toward the position of the tooling bracket 4 to grind the inner surface of the annular workpiece 3. Since the distance between the grinding wheel 7 and the tooling bracket 4 is controllable, the wall thickness and coaxiality of the processed annular workpiece 3 are very high. This processing device is suitable for high-precision processing of the inner hole of the annular workpiece.

Claims

1. A centrifugal positioning processing device for an internal cylindrical grinder, comprising a spindle stand plate, wherein an electromagnetic spindle is arranged at the center of the spindle stand plate, characterized in that: An electromagnetic chuck is provided at the front end of the electromagnetic spindle, and an annular workpiece corresponds to the front end of the electromagnetic chuck. A spindle vertical plate is arranged on the front end surface of the electromagnetic spindle, and a right-angle positioning block is provided on the spindle vertical plate. A tooling bracket is also provided on the spindle vertical plate. The outer side of the tooling bracket contacts and positions with the right-angle positioning block, and the inner arc surface of the tooling bracket contacts and positions with the outer circle of the annular workpiece. A grinding wheel is installed at the front end of the grinding head.

2. The centrifugal positioning processing device for an internal cylindrical grinder according to claim 1, characterized in that: The right-angle positioning block is provided with a ball head screw, and the end of the ball head screw abuts against the outer side surface of the tooling bracket.

3. The centrifugal positioning processing device for an internal cylindrical grinder according to claim 1, characterized in that: The center of the inner arc of the tooling bracket does not coincide with the center of the electromagnetic spindle.

4. The centrifugal positioning processing device for an internal cylindrical grinder according to claim 1, characterized in that: The end surface of the electromagnetic chuck is a self-grinding plane, and the end surface of the annular workpiece is adsorbed on the end surface of the electromagnetic chuck by magnetic force.

5. The centrifugal positioning processing device for an internal cylindrical grinder according to claim 1, characterized in that: The electromagnetic spindle rotates clockwise, and the arc center of the tooling bracket is located at the upper right of the electromagnetic spindle.

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