JP4245987B2 - Grinding equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grinding apparatus used when, for example, a mold surface of a mold is ground with high accuracy.
[0002]
[Prior art]
Conventionally, when grinding a work surface of a curved surface, such as a mold surface, with high precision, a dedicated processing machine for roughing or intermediate finishing is used, and then dedicated The machined surface was ground to a predetermined shape with high accuracy by rotating contact of a grinding tip or the like.
[0003]
[Problems to be solved by the invention]
Therefore, conventionally, a plurality of dedicated machines are required, which is not only disadvantageous in terms of equipment cost, but also requires a setup change of the workpiece, so that the machining accuracy may be lowered.
[0004]
The present invention has been made paying attention to such problems existing in the prior art. The object is to provide a grinding apparatus capable of grinding from rough machining to finishing of a workpiece with a single processing machine.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to a first aspect of the present invention, there is provided a grinding apparatus in which a grinding tip rotated by a motor is provided on a main body, and the main body is detachably attached to a column of a grinding machine. with pivotally supported about a horizontal axis relative to the mounting frame, outside for positioning fitted around the pivot motor for rotating the main body is provided for further spindle said column to the body The fitting motor is provided with a driving pulley, and the mounting frame is provided with a driven pulley connected to the main body, and the driven pulley is positioned on the same axis as the spindle and the outer fitting part. So as to be able to rotate with respect to the mounting frame, and the rotation of the turning motor causes the book to pass through the driving pulley and the driven pulley. By pivoting the pivoting center of the body it is characterized in that configured so that the axis position of a spindle of a grinding machine.
[0006]
Therefore, according to the first aspect of the present invention, it can be easily mounted and used on a normal grinder column, and when mounting the mounting frame on the grinder column, the column spindle is used as a reference. It can be positioned and arranged accurately at a predetermined position. The grinding tip can be brought into contact with the machining surface of the workpiece from the normal direction by turning the main body during grinding, which contributes to improvement in machining accuracy.
[0007]
According to a second aspect of the present invention, in the first aspect of the present invention, the support cylinder is inserted into and supported by the main body so as to be movable in the axial direction, and the rotary shaft having the grinding chip and the fluid motor is rotatable to the support cylinder. It is characterized in that it is housed and supported.
[0008]
Therefore, in the invention described in claim 2, since the motor for rotating the grinding tip is a fluid motor, if a large load acts in the rotation direction of the grinding tip for some reason, it is effectively released. Can do.
[0009]
The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the main body supports a support cylinder and a counterweight for reducing the load on the rotating shaft. is there.
[0010]
Therefore, in the invention described in claim 3, the contact pressure acting on the processing surface by the grinding tip is reduced by the counterweight.
According to a fourth aspect of the present invention, in the third aspect of the present invention, a connecting line is provided between the counterweight and the support tube, and a rotating body for guiding the connecting line is rotatable on the main body. And a hydrostatic bearing is interposed between the support cylinder, the counterweight, and the rotating body and the main body.
[0011]
Thus, according to the fourth aspect of the invention, coupled with the action of the counterweight, the contact pressure by the grinding tip hardly acts on the machined surface, so that high-precision fine pressure machining is possible.
[0012]
The invention according to claim 5 is characterized in that the fluid motor according to any one of claims 2 to 4 is an air motor.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, a spindle 13 is rotatably supported on a column 12 of a grinding machine 11, and a rotating grindstone (not shown) is detachably attached to the tip thereof. A mounting plate 14 is fixed to the column 12, and a grindstone cover (not shown) is detachably attached to the mounting plate 14 by a plurality of bolts 15.
[0014]
A grinding wheel 16 is detachably attached to the mounting plate 14 with the rotating grindstone removed from the spindle 13 of the grinding machine 11 and the grindstone cover removed from the mounting plate 14. That is, the grinding device 16 is provided with an attachment frame 17, and the attachment frame 17 is detachably attached to the attachment plate 14 by the plurality of bolts 15.
[0015]
A main body 18 is rotatably supported on the mounting frame 17, and an outer fitting portion 18 a for fitting on the spindle 13 is projected from an end portion thereof. When the mounting frame 17 is attached to the mounting plate 14 on the column 12, the external fitting portion 18 a on the main body 18 is externally fitted to the spindle 13, so that the machining device 16 is based on the axis of the spindle 13. The whole is positioned and arranged at a predetermined position. Here, the spindle 13 is maintained in a stopped state without being rotated.
[0016]
As shown in FIGS. 1 to 3, a driven pulley 19 is rotatably supported by a mounting frame 17 via a bearing 20 so as to be positioned on the same axis as the outer fitting portion 18 a of the main body 18. It is connected to the main body 18 via a member 21. The mounting frame 17 is provided with a turning motor 22 made of a servo motor, and a belt 24 is hung between the driving pulley 23 attached to the motor shaft 22 a and the driven pulley 19. Then, the rotation of the turning motor 22 causes the main body 18 to turn about the horizontal axis about the axis of the spindle 13 via the drive pulley 23, the belt 24 and the driven pulley 19. In this embodiment, the main body 18 is turned around the axial position of the spindle 13.
[0017]
As shown in FIGS. 1, 2, and 4 to 6, a support cylinder 25 is inserted into and supported by the main body 18 through a hydrostatic bearing 26 so as to be movable in its own axial direction. A rotating shaft 27 is accommodated and supported in the support cylinder 25 so as to be rotatable about its own axis, and a grinding tip 28 as a tool is attached to the lower end thereof. A fluid motor 29 is provided at an intermediate portion of the rotating shaft 27, and includes a plurality of turbine grooves 29 a formed on the outer periphery of the rotating shaft 27 and a plurality of air blowing holes 29 b formed in the support cylinder 25. Yes. The air is blown from the air blowing hole 29b to the turbine groove 29a, whereby the rotating shaft 27 is rotated at a high speed.
[0018]
A counterweight 30 is supported on the main body 18 via a hydrostatic bearing 31 so as to be movable in the same direction as the movement of the support cylinder 25, and a connecting line 32 is provided between the upper ends of the counterweight 30 and the support cylinder 25. It is connected. A rotating body 33 is rotatably supported on the main body 18 via a bracket 34 and a hydrostatic bearing 35, and the connecting line 32 is guided around the outer periphery of the rotating body 33.
[0019]
A moving cylinder 36 is disposed on the main body 18, and its piston rod 36 a is connected to the connecting line 32 via a connecting plate 37. Then, the support cylinder 25 and the rotary shaft 27 are moved in the vertical direction by the moving cylinder 36 via the connecting cable 32, and the grinding tip 28 is disposed at a position where the grinding tip 28 contacts the processing surface Wa on the workpiece W. In this case, the counterweight 30 cancels and reduces the load on the support cylinder 25 and the rotary shaft 27, so that the grinding tip 28 is brought into contact with the processing surface Wa in almost no load state.
[0020]
Next, the operation of the grinding apparatus configured as described above will be described.
Now, when the grinding device 16 is used, as shown in FIGS. 1 and 2, a mounting frame 17 is attached to the mounting plate 14 of the column 12 in the grinding machine 11 instead of the grindstone cover. The entire 16 is mounted on the column 12. In this case, the outer fitting portion 18a of the main body 18 is fitted on the spindle 13 of the column 12, and the entire processing device 16 is accurately positioned and arranged at a predetermined position with respect to the axis of the spindle 13.
[0021]
When the processing device 16 is operated in this state, the grinding tip 28 is rotated at high speed by the fluid motor 29 via the rotating shaft 27. At the same time, the turning motor 22 is rotated by a control device (not shown), and the main body 18 is turned around the axis of the spindle 13 via the drive pulley 23, the belt 24 and the driven pulley 19. Thereby, the grinding | polishing chip | tip 28 is opposingly arranged so that it may contact with respect to the process surface Wa of the workpiece | work W from a normal line direction.
[0022]
Further, the moving cylinder 36 is actuated by the control device, the support cylinder 25 and the rotating shaft 27 are moved in the vertical direction via the connecting line 32, and the grinding tip 28 comes into contact with the predetermined machining surface Wa on the workpiece W. Opposed to the position. In this case, the counterweight 30 is moved in the vertical direction via the connecting cord 32 as the support cylinder 25 and the rotary shaft 27 are moved. Thereby, the load of the support cylinder 25 and the rotating shaft 27 is canceled and reduced, and the grinding tip 28 is brought into contact with the processing surface Wa in a substantially no-load state. Therefore, the processing surface Wa of the workpiece W is finely ground to a predetermined shape with high precision by the grinding tip 28 rotating at high speed.
[0023]
Therefore, according to this embodiment, the following effects can be obtained.
(1) In this grinding apparatus, since the mounting frame 17 for detachably mounting to the column 12 of the grinding machine 11 is equipped, the normal grinding machine 11 is connected via the mounting frame 17. It can be easily attached to the column 12 for use. Therefore, if the workpiece W is roughed or semi-finished by the grinder 11 and then the rotating grindstone (not shown) of the grinder 11 is removed, and the grinding apparatus of this embodiment is supported by the column 12, the finishing process is performed. It can be performed. Accordingly, a single grinding machine can perform a series of processing from roughing to finishing, and it is not necessary to replace the workpiece W, so that high-precision processing is possible.
[0024]
(2) In this grinding apparatus, when the attachment frame 17 is attached to the column 12 of the grinding machine 11, the external fitting portion 18 a on the main body 18 is externally fitted to the spindle 13 of the column 12, whereby the spindle 13 As a reference, the entire apparatus can be accurately positioned and arranged at a predetermined position.
[0025]
(3) In this grinding apparatus, the grinding tip 28 is rotated in the normal direction with respect to the work surface Wa of the workpiece W by turning the main body 18 with respect to the mounting frame 17 by the turning motor 22 during grinding. Even if there is unevenness on the processing surface Wa, the processing accuracy can be improved.
[0026]
(4) In this grinding apparatus, since the main body 18 is pivoted around the axis position of the spindle 13 of the grinding machine, the fine pressure machining apparatus can be turned with high precision while the grinding machine is mounted on the grinding machine. Can be done.
[0027]
(5) In this grinding apparatus, a support cylinder 25 is inserted into and supported by the main body 18 so as to be movable in the axial direction, and a rotary shaft 27 having a grinding chip 28 and a fluid motor 29 is rotatable in the support cylinder 25. Contained and supported. A counter weight 30 for reducing the load on the support cylinder 25 and the rotary shaft 27 is movably supported on the main body 18, and a rotation for guiding a connecting line 32 between the counter weight 30 and the support cylinder 25. The body 33 is rotatably supported. Then, static pressure bearings 26, 31, and 35 are interposed between the support cylinder 25, the counterweight 30, the rotating body 33, and the main body 18, respectively.
[0028]
For this reason, since the motor for rotating the grinding tip 28 is a fluid motor, when a large load is applied in the direction of the grinding tip 28 for some reason, the load can be absorbed. For this reason, the grinding tip 28 is not forcibly rotated against the load. Further, the contact pressure acting on the machining surface Wa of the workpiece W by the grinding tip 28 is reduced by the counterweight 30. Further, since the counterweight 30 and the support cylinder 25 are supported by the hydrostatic bearing, almost no resistance acts on the axial movement of the grinding tip 28. Therefore, since the contact pressure by the grinding tip 28 hardly acts on the processing surface, high-precision micro-pressure processing is possible.
[0029]
(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
-In the said embodiment, the vibrator which provides a light vibration is interposed between the rotating shaft 27 and the grinding tip 28, and the grinding tip 28 is vibrated lightly during grinding with this vibrator. In this way, the grinding efficiency can be improved.
[0030]
In the above embodiment, when a one-way clutch such as a spring clutch is provided between the rotating shaft 27 and the grinding tip 28 and a large load in the rotating direction acts on the grinding tip 28, the rotating shaft 27 and the grinding tip 28 It is configured so that the rotation transmission to and from is interrupted.
[0031]
【The invention's effect】
As described above in the embodiment, in the present invention, a series of processing from roughing to finishing is performed with one processing apparatus, and the processing surface of the workpiece can be finely ground with high accuracy. Exhibits excellent effects that can be achieved.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a main part showing a grinding apparatus according to an embodiment.
FIG. 2 is an enlarged cross-sectional view of a main part of the grinding apparatus of FIG.
3 is an enlarged cross-sectional view taken along line 3-3 in FIG.
4 is an enlarged cross-sectional view taken along line 4-4 of FIG.
5 is a partial cross-sectional view showing a part of FIG. 1 in an enlarged manner.
6 is a cross-sectional view taken along line 6-6 in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Grinding machine, 12 ... Column, 13 ... Spindle, 16 ... Grinding device, 17 ... Mounting frame, 18 ... Main body, 18a ... Outer fitting part, 22 ... Turning motor, 25 ... Support cylinder, 26 ... Static pressure Bearing, 27 ... Rotating shaft, 28 ... Grinding tip, 29 ... Fluid motor, 30 ... Counter weight, 31 ... Static pressure bearing, 32 ... Connecting cable, 33 ... Rotating body, 35 ... Static bearing, 36 ... Cylinder for movement, W ... Workpiece, Wa ... Machining surface.

Claims (5)

In a grinding apparatus provided with a grinding tip rotated by a motor on the main body, the main body is supported so as to be pivotable about a horizontal axis with respect to a mounting frame that is detachably attached to a column of a grinding machine, Provided with a turning motor for turning the main body, and further provided with an outer fitting portion for externally fitting and positioning with respect to the column spindle ,
The swing motor is provided with a driving pulley, and the mounting frame is provided with a driven pulley connected to the main body, and the driven pulley is positioned on the same axis as the spindle and the outer fitting portion. Supported rotatably for the frame,
Grinding characterized in that the turning center of the main body becomes the axial position of the spindle of the grinding machine by turning the main body through the driving pulley and the driven pulley by the rotation of the turning motor. Processing equipment. 2. The grinding apparatus according to claim 1, wherein a support cylinder is inserted into and supported by the main body so as to be movable in the axial direction, and a rotary shaft having the grinding tip and a fluid motor is rotatably accommodated and supported by the support cylinder. . The grinding apparatus according to claim 1 or 2, wherein the main body supports a support weight and a counterweight for reducing the load on the rotating shaft. A connecting cable is provided between the counterweight and the support cylinder, and a rotating body for guiding the connecting cable is rotatably supported on the main body, and the support cylinder, the counterweight and the rotating body are interposed between the main body and the main body. The grinding apparatus according to claim 3, wherein each is provided with a hydrostatic bearing. The grinding apparatus according to claim 2, wherein the fluid motor is an air motor.

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