JPH08353B2 - Peripheral grinding chamfering device - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an apparatus for grinding and chamfering the outer periphery of a brittle thin plate-like work such as glass or silicon.

[Background of the Invention]

Conventionally, to grind the outer circumference of these thin plate-shaped workpieces,
First, a so-called master having a shape equal to the target machining dimension of the work was made, and the grindstone was moved in accordance with the shape of the master to grind the outer circumference of the work. However, this method has drawbacks such that a new master has to be created every time the shape of the work changes, the manufacturing cost is high, and setup work such as master replacement is not easy.

Another method of grinding the outer circumference of a work without using a master is NC control. As an example thereof, it is conceivable to grind the outer circumference of a work placed on a rotating table with a grindstone capable of XY movement control. In this peripheral grinder, since the grinding point where the grindstone and the work contact each other is constant, the nozzle for supplying the coolant may be fixed to the grinding point. However, depending on the shape and size of the work, it may be necessary to fix the work on a table and move a grindstone whose XY movement is controllable along the outer circumference of the work for grinding. In such an outer peripheral grinder, the grinding point where the grindstone and the workpiece come into contact always moves, so the direction of the nozzle that supplies the coolant must also be controlled so that it always faces the moving grinding point.

[Object of the Invention]

The present invention has been made in view of the above circumstances, and is a device for grinding the outer periphery of a work by a grindstone that moves along the periphery of the work, and is capable of constantly supplying coolant to a moving grinding point. An object is to provide an outer peripheral grinding chamfering device that can be performed.

[Outline of Invention]

In order to achieve the above object, the present invention provides a table for holding a work, an X-Y direction moving base that moves in X and Y directions by a command, and a grindstone shaft rotatably held by the X-Y direction moving base. And a grindstone that is held by the grindstone shaft, moves around the work, and grinds the outer circumference thereof, and is attached to one end of the grindstone shaft, the grindstone moves around the work, and grinds the outer circumference thereof. In this case, a coolant injection mechanism having a nozzle rotatably held toward the grinding point, and a control device for controlling the XY direction moving base and the coolant injection mechanism are provided. It is a thing.

Example of Invention

In FIG. 1, the work 1 is fixed horizontally. Guides 3 and 4 that are horizontal in the X-X direction are provided in parallel on the base 2 of the machine base, and an X-direction moving base 7 is placed thereon. Further, the base 2 has a drive shaft 5 horizontally, and the shaft is rotated in the forward and reverse directions by a pulse motor 6 to move the X-direction moving table 7 in the left and right directions in the figure. A guide 1011 is horizontally provided on the X-direction moving base in the Y-Y direction at right angles to the X-direction, and the moving base 12 is placed thereon.
Then, the drive shaft 13 is provided in parallel with the guides 10 and 11, and the drive pulse motor 14 is attached thereto. Here, the moving table 12 moves in the X direction by the rotation of the motor 6 and in the Y direction by the rotation of the motor 14.

In FIG. 1 and FIG. 2, a grindstone bearing 21 and a grindstone rotation motor 22 are vertically arranged on the movable table 12, and the rotation of the motor 22 rotates a grindstone shaft by a belt 23 to rotate the grindstone 24.
Is mounted horizontally. Here, the center point of the grindstone shaft moves to X and Y in response to a command from the computer and takes the position of the commanded coordinate value. That is, for work 1
In order to grind the one point A, the X and Y coordinate values of the point B having the radius R of the grindstone are instructed on the line perpendicular to the cutting line ab at the point A. What is written on the outside of the shape of the work 1 is shown by a chain line. Therefore, the center locus of the grindstone is determined by taking the grinding allowance into consideration, and accordingly, the XY control is performed by the computer.

Next, a coolant injection device required for grinding will be described with reference to FIG. In the conventional grinder, the working point of the grindstone is constant, so it suffices to inject the coolant toward it, but when the grinding point moves as in the present invention, the position of the injection nozzle and It is necessary to change the direction.

Therefore, the pulse motor 31 is vertically attached to the plate supporting the grindstone bearing 21, and the gear 32 is provided on the shaft thereof. Also grindstone bearing 21
A guide hole member 34 having a guide hole 35 for the coolant is fixed underneath. The end of the guide hole 35 communicates with the groove 36 on the outer circumference. Further, the ring 38 having the gear 37 meshing with the gear 32 is inserted into the small diameter portion of the member 34, and the ring 38 is rotatably stopped by the stop ring 40. Here, a guide hole 39 is provided in the ring 38 at a position in contact with the groove 36 of the member 34, and a nozzle 41 for injecting a coolant is provided at the lower end of the guide hole 39 toward the grindstone 24. It should be noted that a seal is appropriately provided at the portion where the coolant is transferred between the guide hole member 34 and the ring 38. A coolant supply pipe is connected to the guide hole 35 so as not to hinder the X and Y movements of the grindstone shaft.

In such a structure, since the X and Y movements of the grindstone shaft are programmed as described above, it is necessary to regulate only the direction of the nozzle 41 corresponding to each X and Y position accordingly. Therefore, the rotation of the motor 31 is controlled to rotate the nozzle ring 38 to control the direction of the nozzle.

〔The invention's effect〕

As described above, according to the outer peripheral grinding chamfering device of the present invention, it is not necessary to make a master having a shape equal to the machining target dimension of the work, and the work is fixed, and a grindstone capable of XY movement control is provided for the work. When moving the periphery and grinding the outer periphery, it is possible to supply the coolant to the grinding point that always moves reliably.

[Brief description of drawings]

FIG. 1 is a plan view showing the structure of the present invention. FIG. 2 is a side view of the grindstone shaft. FIG. 3 is a sectional view of a grindstone shaft portion showing a coolant injection mechanism. 1 ... Work, 3,4 ... X direction guide, 5 ... Drive shaft,
6, 14 ... Motor, 7 ... X-direction moving stand, 12 ... XY
Direction moving table, 21 …… Whetstone axis, 24 …… Whetstone, 31 …… Coolant control pulse motor, 34 …… Conduit hole member, 38 …… Nozzle ring, 41 …… Coolant injection nozzle

Claims (1)

[Claims] 1. A table for holding a work and a command
An X-Y direction moving base that moves in the X and Y directions, a grindstone shaft rotatably held by the X-Y direction moving base, and a grindstone shaft that is held and moves around the work, and its outer periphery. And a nozzle attached to one end of the grindstone shaft that moves around the workpiece and grinds the outer periphery of the grindstone that is rotatably held toward the grinding point. Peripheral grinding chamfering device comprising a coolant injection mechanism, a control device for controlling the XY direction moving base and the coolant injection mechanism