JPH0255189B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a deburring device using a disc-shaped grindstone.

(Prior Art) Conventionally, when gears are formed by cutting a material, burrs are generated at the gear cutting portion, but these burrs can be removed by grinding with a grindstone.

In this case, if you grind for a long time, the grindstone will wear out and become smaller than its original size. Therefore, the location of the grindstone is changed to continue grinding.

FIG. 1 is an operational explanatory diagram showing the relationship between the contact positions of a conventional disc-shaped grindstone and a workpiece.

As shown in the figure, when deburring a workpiece 102 such as a gear using a disk-shaped grinding wheel 101, the grinding wheel 101 may
The diameter L gradually decreases, and if grinding is continued in that state, the contact pressure of the grindstone 101 will become low, resulting in insufficient deburring.

In order to maintain a constant chamfer shape even if this diameter L decreases, the contact angle α between the grinding wheel 101 and the workpiece 102 (the line connecting the center of the grinding wheel and the contact point, that is, the normal direction of the contact surface is a vertical line) is required. angle) and the relative position of the grindstone 101 to the workpiece 102 must be adjusted so as to maintain a constant contact pressure.

Therefore, in a conventional deburring device using a disc-shaped grindstone, the grindstone head, which consists of a rotary drive shaft directly connected to an air motor and a disc-shaped grindstone 101 attached to its tip, is attached to the arm that supports it. It is supported by a fulcrum pin so that it can swing. Further, since the arm is designed to be able to move left and right on the holding shaft, the grindstone head supported by the arm can also be moved left and right.

A contact pressure adjustment spring is installed between the grindstone head and the arm, and by adjusting it, the grinding pressure can be increased or decreased.

On the other hand, the workpiece support table on which the workpiece 102 is mounted is supported so as to be able to rise and fall, and is also rotatable in both left and right directions.

(Problems to be Solved by the Invention) However, in the deburring device using the disk-shaped grindstone configured as described above, in the process of decreasing the diameter L of the grindstone 101, the contact angle α between the grindstone 101 and the workpiece 102 is
It is necessary to adjust the alignment between the grinding wheel 101 and the workpiece 102 by always keeping the contact pressure constant. In this case, as shown in FIG. 2, the grinding wheel 101 is moved horizontally along the grinding wheel head holding axis. At the same time, the workpiece support platform must be raised.

That is, it is necessary to move the grindstone 101 in the horizontal direction and to move the workpiece support in the vertical direction. Moreover, the amount of horizontal movement of the grinding wheel 101 and the amount of vertical movement of the workpiece support are
It is necessary to select so that the contact angle α between the grindstone 101 and the workpiece 102 does not change, and a complicated adjustment work is required every time the grindstone 101 is worn and the diameter L is reduced.

In addition, a contact pressure adjustment spring is installed, and by adjusting it, the grinding pressure can be adjusted; however, the contact pressure adjustment spring is installed between the grinding wheel head and the arm. Therefore, the biasing direction is restricted by the support state between the grindstone head or the arms, making it impossible to make accurate adjustments. In other words, since the contact pressure adjustment spring cannot be expanded or contracted in the direction in which contact pressure is generated between the grindstone 101 and the workpiece 102 (the normal direction of the contact surface), the amount of adjustment of the spring when adjusting the contact pressure adjustment spring is It becomes difficult to make the amount of change correspond to the actual amount of change in contact pressure.

Furthermore, even when initially setting the alignment between the grindstone 101 and the workpiece 102, it is necessary to perform operations such as raising and lowering the workpiece support and moving the grindstone head left and right, which takes time for adjustment.

In addition, it is difficult to operate the grinding wheel 101 and the workpiece support in two directions in a stepless manner in response to the reduction in the diameter of the grinding wheel, and after grinding the workpiece, the shape may vary, resulting in uniform deburring or Chamfering cannot be performed.

The present invention solves the problems of the conventional deburring device using a disc-shaped grindstone, and allows the workpiece support to be moved during initial setting or during adjustment when the diameter of the grindstone is reduced due to wear. To provide a deburring device using a disk-shaped grindstone, which can maintain the contact angle and contact pressure by moving only the grindstone, without moving the grindstone, and can accurately adjust the contact pressure.

(Means for Solving the Problems) For this purpose, in the deburring device using a disc-shaped grindstone of the present invention, a horizontal slide is arranged to be movable in the horizontal direction, and a horizontal slide is rotated with respect to the horizontal slide. a rotary table that is freely disposed and equipped with a means for setting a relative position with respect to a horizontal slide; an arm equipped with a means for setting a position, and a grindstone head that is swingably supported with respect to the arm on a plane including the table rotation axis direction and the sliding direction of the arm. The head is composed of a motor having a rotational drive shaft disposed in the same direction as the table rotation axis, and a disc-shaped grindstone rotationally driven by the motor, and adjusts the contact pressure between the head and the arm. An elastic body is arranged in the swinging direction.

(Operations and Effects of the Invention) According to the present invention, there is provided a horizontal slide disposed so as to be movable in the horizontal direction as described above, and a horizontal slide disposed rotatably relative to the horizontal slide. A rotary table equipped with a means for setting a relative position to the rotary table, and an arm that is slidably disposed on the rotary table in a direction perpendicular to the table rotation axis and is equipped with a means for setting a relative position to the rotary table. and a grindstone head that is swingably supported with respect to the arm on a plane including the table rotation axis direction and the arm sliding direction, and the grindstone head is supported in the same direction as the table rotation axis. It consists of a motor having a rotating drive shaft and a disc-shaped grindstone that is rotationally driven by the motor.

Therefore, the rotary table can be rotated relative to the horizontal slide, and the arm can be fixed with the sliding direction aligned with the normal direction of the contact surface between the grindstone and the workpiece. In this case, when the grinding wheel wears out and its diameter decreases during use,
It becomes possible to slide the arm on the rotary table in the normal direction of the contact surface between the grindstone and the workpiece.

In other words, when the diameter of the grinding wheel decreases due to wear, the contact pressure between the grinding wheel and the workpiece can be maintained by sliding the arm in only one direction using the arm setting means, making the work easier. It is large, highly accurate, and requires less time for adjustment.

In addition, when sliding the armrest, the sliding direction always matches the normal direction of the contact surface between the grindstone and the workpiece, so the contact angle between the grindstone and the workpiece may change before and after adjustment. It disappears.

Since an elastic body for adjusting contact pressure is disposed in the swinging direction between the grindstone head and the arm, the direction of expansion and contraction of the elastic body coincides with the sliding direction of the arm. Therefore, it becomes possible to adjust the contact pressure accurately.

Furthermore, the above-mentioned work is easy and highly accurate, the time required for adjustment is short, and since the armrest slides on the rotary table, stepless adjustment is possible.

Furthermore, by adding a correction mechanism linked to the grindstone wear detection device to the arm setting means, it is possible to completely automate the adjustment of the grindstone position.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 3 is a front view of an embodiment of a deburring device using a disc-shaped grindstone, and FIG. 4 is a side view showing a part of the deburring device in cross section.

Reference numeral 1 is a horizontal slide, and reference numeral 2 is three horizontal holding shafts arranged at the top, middle, and bottom. The horizontal slide 1 has a rectangular plate shape, is supported vertically on a holding shaft 2, and is movable in the horizontal direction.

A disc-shaped rotary table 3 is provided on the horizontal slide 1. A table rotation shaft 5 protruding from the center of the rear surface of the rotary table 3 is slidably fitted into the center hole 4 of the front surface of the horizontal slide 1 and is rotatably supported. Further, two arcuate holes 6 are formed on the outer circumferential side of the rotary table 3, and nut holes are formed in the horizontal slide 1 at positions corresponding to the arcuate holes 6. By tightening the
The rotary table 3 can be fixed at a predetermined rotational position.

A rail groove 8 is carved on the front surface of the rotary table 3 and extends in the diametrical direction of the rotary table 3, and an annular plate 9 is fixed to the outer peripheral surface of the rotary table 3 at one end of the rail groove 8. . A slide threaded rod 10 is rotatably fitted into the hole of the annular plate 9 parallel to the rail groove 8, and a rotary plate 12 with a handle bar 11 protruding from one end of the slide threaded rod 10 is fitted into the hole of the annular plate 9. Fixed. When the rotary plate 12 is rotated, the slide threaded rod 10 rotates, and the rail groove 8 and the slide threaded rod 10 form a grindstone adjustment slide.

On the other hand, the front surface of the rotary table 3 includes an upper plate 133 and both side walls 134 extending forward from the thick rear wall 131.
An armpiece 13 having a protrusion 132 having a U-shaped cross section made of 135 is attached. In the arm equipment 1, a convex portion 136 on the rear surface of a rear side wall 131 is slidably fitted into the rail groove 8, and a screw hole 137 vertically passing through the rear side wall 131 is connected to the slide threaded rod 10.
By rotating the slide screw 10, the rotary table 3 can be rotated along the rail groove 8.
slide on top.

A grindstone head 14 is attached to the arm 13. The grindstone head 14 has a motor 15 and a motor 1.
5, a long rotary drive shaft 16 protrudes from the rotary drive shaft 16, and a disk-shaped grindstone 17 fixed to the tip of the rotary drive shaft 16. The rotation drive shaft 16 is arranged to extend in the same direction as the table rotation shaft 5.

Further, in the grindstone head 14, the fulcrum shaft 18 provided on the motor 15 is attached to both side walls 134, 1 of the armrest 13.
35, it can swing about the fulcrum shaft 18 in a plane including the sliding direction of the arm 13 and the direction of the rotational drive shaft.

An elastic body, that is, a spring 19 is stretched between the upper plate 133 of the armrest 13 and the motor 15, and the rotational drive shaft 16 is supported so as to be swingable while being held at a position orthogonal to the rotation table 3. ing.

Next, the operation of the deburring device using the disc-shaped grindstone having the above structure will be explained with reference to FIG.

FIG. 5 is an explanatory diagram showing changes in the relative position between the grindstone and the workpiece.

As shown in the figure, by adjusting the rotation of the rotary table 3, the angle β (inclination angle from the vertical direction) of the inclination of the grinding wheel head 14 (that is, the inclination of the grinding wheel adjustment slide) is adjusted in advance to the contact angle α between the workpiece 20 and the grinding wheel 17. (angle of inclination from the vertical direction).

If the diameter of the grindstone decreases due to wear due to deburring work, the grindstone 17 is rotated by rotating the rotary plate 12 at a constant angle β (i.e., grindstone contact angle α) along the grindstone adjustment slide to reduce the wear. Move the grinding wheel in the direction of contact with the workpiece by the length of the radius. This unidirectional operation allows the contact pressure to be maintained without changing the contact angle α.

Also, at this time, the spring 19 is arranged so as to expand and contract in the same direction as the sliding direction as the rotary table rotates, so the amount of expansion and contraction of the spring 19 and the difference between the grinding wheel 17 and the workpiece 20 occur. The contact pressure will correspond directly.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the relationship between the contact position between the disc-shaped grindstone and the workpiece, and Figure 2 shows the change in the relative position between the disc-shaped grindstone and the workpiece due to grindstone wear in a conventional deburring device using a disc-shaped grindstone. An explanatory diagram of the operation shown,
FIG. 3 is a front view of a deburring device using a disk-shaped grindstone according to the present invention, FIG. 4 is a side view of the same main part, and FIG. 5 is an explanatory view showing changes in the relative position between the grindstone and the workpiece. 1...Horizontal slide, 2...Holding shaft, 3...
...Rotary table, 5...Table rotation axis, 8...
Rail groove, 10... Threaded rod for slide, 12...
Rotating plate, 13... Arms, 14... Grinding wheel head, 1
5... Motor, 16... Rotation drive shaft, 17... Grindstone, 18... Fulcrum shaft, 19... Spring (elastic body), 20... Work.

Claims (1)

[Claims] 1. A horizontal slide disposed so as to be movable in the horizontal direction, a rotary table disposed rotatably with respect to the horizontal slide and provided with means for setting a relative position with respect to the horizontal slide; an arm that is slidably disposed on a table in a direction orthogonal to the table rotation axis and is provided with means for setting a relative position with respect to the rotation table, and a direction that includes the table rotation axis direction and the sliding direction of the arm It has a grindstone head that is slidably supported on the arm on a plane, and the grindstone head is driven by a motor having a rotary drive shaft disposed in the same direction as the table rotation axis, and 1. A deburring device using a disc-shaped grindstone, comprising a disc-shaped grindstone that is rotationally driven, and further comprising an elastic body disposed in a swinging direction between the arm and the arm for adjusting contact pressure.