JPH0655444A - Dressing device for grinder - Google Patents

Abstract

PURPOSE:To reduce the cost of equipment by eliminating an exclusive mechanism allowing a grinding wheel dressing device to be advanced/retreated in relation to the grinding wheel dressing device such as a worm grinder and the like. CONSTITUTION:A lengthwise base 2 on which a grinding wheel head 3 is fixedly provided, is advanced/retreated by a servo motor 52 for advancing/retreating the base. And a work table 5 is also advanced/retreated by a servo motor 55 for advancing/retreating a spindle. A dressing device 9 is fixed on the side of a head stock 6, and is furnished with a diamond roll dresser. At the time of dressing, a grinding wheel 53 is set at a specified position while being rotated by the servo motor 52 for advancing/retreating the spindle, the head stock is then moved by the servo motor 55 for advancing/retreating the spindle while the diamond roll dresser is being driven so as to be rotated, and the dressing device 9 is moved to the specified position, so that dressing is thereby performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding device such as a worm grinding machine, and more particularly to a dressing device for a grindstone in the grinding machine.

[0002]

2. Description of the Related Art An example of a conventional grinding machine will be described with reference to FIG. 3. In FIG. 3, reference numeral 10 denotes a bed of the grinding machine, and a grindstone 11 is mounted on the bed 10 so as to be movable back and forth. It is placed.

A diamond grain or CBN is used for the grindstone base 11.
A disc-shaped grindstone 12 made of ultra-hard abrasive grains is rotatably supported, and the grindstone 12 is rotationally driven by a grindstone driving motor 13 installed on the grindstone base 11 via a belt transmission device 14. Is configured.

The grindstone 11 is advanced and retracted by a feed mechanism having a servomotor 15 as a drive source.

A table 17 is placed on the bed 10, a work W is supported between a headstock 18 and a tailstock 19 installed on the table 17, and the work W is installed on the headstock 18. It is adapted to be rotationally driven by the main shaft drive motor 20.

Reference numeral 21 denotes a dressing device installed on the grindstone base 11. The dressing device 21 includes a rotary dresser 22 and a single-stone or multi-diamond diamond dresser 23 made of a polygonal pyramid diamond, and these are grindstones. A first servomotor 24 for advancing and retracting to give a cut to 12 and a second servomotor 24 for traversing in the grindstone axis direction
It is provided with a feed mechanism that uses the servomotor 25 as a drive source.

Reference numeral 30 is a servomotor 15 of the grindstone base 11.
And the first and second servomotors 24 of the dressing device 21,
It is a numerical controller for controlling 25.

Further, 31a is a drive circuit for the servo motor 15, 31b is a drive circuit for the first servo motor 24,
Reference numeral 31c is a drive circuit for the second servomotor 25.

The numerical controller 30 is mainly composed of an arithmetic processing unit 32, a memory 33, an input device 36 and pulse distributors 34a, 34b and 34c.

The dressing number n is set by the input device 36 and stored in the memory 33. In addition, the pulse distributors 34a, 34b, 34c include drive circuits 31a, 31b,
Distribute the pulse to 31c.

[0011]

By the way, the grinding wheel dressing in the conventional grinding machine as described above is performed by driving the first servo motor 24 and the second servo motor 25 of the dressing apparatus 21 mounted on the grinding wheel head side. ing. That is, it is installed separately from the spindle drive motor 20 on the side of the work head that supports and rotates the workpiece.

Therefore, there is a problem that the equipment cost increases and that the molding accuracy is poor.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a new grinding machine dressing device that enables NC control, and that feeds the grinding wheel by feeding the table and moving the grinding wheel back and forth. There is.

[0014]

As a structure for achieving the above object, a dressing device for a grinding machine according to the present invention comprises a headstock and a tailstock installed on a work table for supporting a workpiece, and the spindle. Spindle advancing / retreating device for advancing / retreating a base and a spindle rotation driving device for rotating a spindle, a rotary grindstone arranged at a position facing the workpiece for grinding the workpiece, and transferring the grindstone toward the workpiece In a grinding device having a whetstone advancing / retreating device and a whetstone rotation driving device for rotating the whetstone, a dressing device such as a diamond roll dresser for dressing both sides and the peripheral surface of the rotary whetstone is installed on a side portion of the headstock. However, the dressing device is appropriately rotatably connected to the driving means.

[0015]

In the dressing device of the present invention, when dressing the grindstone, first, the grindstone is transferred by the grindstone advancing / retreating device, and the dressing device installed on the side of the headstock is moved by the spindle advancing / retreating device for advancing / retreating the headstock. Set both in place.

Next, while rotating, for example, a diamond roll dresser installed in the dressing device for the grindstone,
The table is moved by the advancing / retreating device and the spindle advancing / retreating device that move the grindstone back and forth to advance and retreat to a predetermined position to dress the grindstone.

When dressing the peripheral surface of the disk-shaped grindstone, the grindstone is moved back and forth to a predetermined position by the grindstone advancing / retreating device, and then the diamond roll dresser is rotated while moving by the main shaft advancing / retreating device, and is again moved. The whetstone is moved forward to a predetermined position and dressing is performed on the circumferential surface of the whetstone.

Further, when performing dressing on the opposite surface of the disk-shaped grindstone, the grindstone and the diamond roll dresser are moved to predetermined positions via the main shaft advancing and retracting device and the grindstone advancing and retracting device in the same manner as described above, and the opposite of the diamond roll dresser. Dress from the side.

As described above, the dressing device for the grindstone is attached to the side portion of the headstock, and the dressing device for the grindstone is performed by using the spindle advancing / retreating device and the grindstone advancing / retreating device. Therefore, it is not necessary to attach a dedicated mechanism for this purpose, and the equipment cost can be reduced.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a grinding device equipped with the dressing device of the present invention, and FIG. 2 is an enlarged view of a dressing device portion.

In these drawings, reference numeral 1 denotes a bed of a grinding apparatus, on which a front and rear base 2 is mounted so as to be able to move forward and backward.

A grindstone head 3 fixed on the front / rear base 2 rotatably supports a grindstone 53 of a normal grindstone or an ultra-hard abrasive grain such as CBN. The grindstone 53 is installed on the front / rear base 2. Further, it is configured to be rotationally driven by the grindstone driving motor 51 via the belt transmission device and the spindle 4.

The front-rear base 2 is constructed so that it can be moved forward and backward by a base forward-backward drive servomotor 52.

A work table 5 is placed on the bed 1, and a headstock 6 installed on the work table 5.
A workpiece W (not shown) is supported between the tailstock 8 and the tailstock 8, and is configured to be rotationally driven by a spindle drive servomotor 54 installed on the spindle stock 6.

A servomotor 55 for advancing / retreating a spindle for moving the work table 5 back and forth is installed on the bed 1.

A dressing device 9 is fixed to the side of the headstock 6, and the dressing device 9 includes a diamond roll dresser 56 shown in FIG.
7, the belt transmission device 58 and the spindle 59 are used to rotate and drive.

The diamond roll dresser 56 is shown in FIG.
As shown in FIG. 5, a large number of diamond grains 60 are arranged in the circumferential portion formed with a predetermined radius of curvature.

A control panel (not shown) is internally provided with a grindstone profile calculation and storage control device and the like so as to perform the following operations.

Next, with reference to FIG. 2, a method of dressing a grindstone based on the above construction will be described.

First, the grindstone 53 is rotated by the grindstone driving motor 51 via the belt transmission device and the spindle 4, and the front / rear base 2 is moved by the base advancing / retreating drive servomotor 52 which is a grindstone advancing / retreating device. The grindstone 53 supported by is set in a predetermined position.

Next, the motor 57, the belt transmission device 58,
While rotating and driving the diamond roll dresser 56 via the spindle 59, the servomotor 5 for advancing and retracting the spindle.
5, the headstock 6 is moved, and the dressing device 9 attached to the headstock 6 is moved to a predetermined position (state a).

As a result, the right side surface of the diamond roll dresser 56 and one side surface of the grindstone 53 are brought into contact with each other while rotating and dressing is performed.

The profile of the grindstone 53 can be dressed by continuously performing the above movements.

Next, when dressing the peripheral portion of the disk-shaped grindstone 53, the grindstone 53 is retracted to a predetermined position and the diamond roll dresser 56 is moved to the right,
The grindstone 53 is again advanced to a predetermined position and dressed while rotating each other (state B). At this time, dressing is performed by the upper peripheral portion of the diamond roll dresser 56.

Next, similarly to the above, the other side surface of the grindstone 53 is dressed by the grindstone advancing / retreating device and the spindle advancing / retreating device in the state of C in the figure. In this case, the diamond roll dresser 56 performs dressing on the side opposite to the above-mentioned state (a).

The positions of the grindstone 53 and the diamond roll dresser 56 are controlled by a grindstone profile calculation and storage control device in the control panel.

As described above, since the dresser is a disk type roll type and a large number of diamonds are arranged and dressing is performed on both sides as described above, the life of the dresser can be extended.

Further, if the grindstone profile is stored in the control device, the shape of the diamond roll dresser is known, and more accurate dressing can be performed,
It is especially effective for grinding worm gears.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various design changes can be made within the scope of the technical idea of the present invention.
All of them belong to the technical scope of the present invention.

[0040]

According to the dressing device for a grinding machine of the present invention, the dressing device for the grindstone is attached to the headstock, and the dressing device for the grindstone is dressed by using the spindle advancing / retreating device and the grindstone advancing / retreating device. Equipment cost can be reduced because there is no need to attach a special mechanism for advancing and retracting the device.

Further, the forming accuracy by dressing the grindstone,
It is economical because it improves the reproducibility and extends the life of the diamond tool.

[Brief description of drawings]

FIG. 1 is a plan view of a grinding device equipped with a dressing device according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a dressing device section of the device.

FIG. 3 is a plan view of a conventional grinding device.

[Explanation of symbols]

 1 bed 2 front and rear base 3 grindstone head 6 headstock 9 dressing device 53 grindstone 56 diamond roll dresser 60 diamond grains

Claims (1)

[Claims] 1. A headstock and a tailstock installed on a work table for supporting a workpiece, a spindle advancing / retreating device for advancing / retreating the headstock, and a spindle rotation drive device for rotating the spindle.
Grinding having a rotary grindstone arranged at a position facing the work for grinding the work, a whetstone advancing / retracting device for transferring the whetstone toward the work, and a whetstone rotation driving device for rotating the whetstone. In the apparatus, a dressing device such as a diamond roll dresser for performing dressing on both sides and the peripheral surface of the rotary grindstone is installed on a side portion of the headstock, and the dressing device is appropriately rotatably connected to a driving means. Dressing device for grinding machines.