JPS626950B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rapid forward and backward movement device for a grinding wheel head of a tool grinding machine.

In order to grind diamond compact tools and other compact tools with high precision, a tool grinder that uses a grindstone combined with abrasive grains such as diamond is used.

Here, one embodiment of the present invention is shown in its appearance in FIG. 1, and the structure and function of this type of device that has been used in the past will be briefly explained, and then the embodiments of the present invention will be described in detail. .

In the figure, reference numeral 1 denotes a base, on which a substrate 2 is slidably engaged, and in the conventional apparatus, a spindle device 4 and a grindstone 5 are mounted and fixed on this, and a grindstone device 6 directly formed. The substrate 2 is moved in the direction of the grindstone position adjustment handle axis by rotation of the grindstone position adjustment handle 3, that is, in the direction of the arrow a.
It can be moved in the direction shown.

Further, the rotation axis of the grindstone 5 can be tilted with respect to the horizontal by rotating the handle 20.
As the grindstone 5, a cup-shaped grindstone in which diamond grains are bonded, as well as other super-abrasive grindstones are used.

Further, a substrate 7 is engaged with the base 1 so as to be movable in the direction of the rotation axis of the grindstone 5, and is configured to be movable in the direction of arrow b by rotation of the handle 8. Also, the board 7 is placed on the top of the board 7.
A work board 9 is fixed integrally with the work board 7, and a swivel base 10 is rotatably fixed at the center of the work board 7.
Although not shown, the swivel base 10 includes a metal fitting that can be fixed at any rotational position. The swivel base 10 can be adjusted in position in the vertical direction indicated by the arrow c using the swivel base vertical adjustment handle 11, and can be maintained at that position.

12 is a cross table, the lower table is fixed to the swivel base 10, the upper table is orthogonally engaged with the lower table, and the upper table is rotated by rotating the handle 13 of the lower table. It can be moved in the direction of arrow d, and the workbench 14 of the upper table can be moved in the direction of arrow e by rotating the handle 15. Reference numeral 16 denotes a column fixed to the substrate 7, and a centering microscope magnifying equipment 17 is attached to the column 16 so as to be rotatable in the direction of the arrow f and movable in the vertical direction of the arrow g. In the figure, 18 is an objective section of the microscope, and 19 is an enlarged projection section. This magnifying projection unit may be replaced by an eyepiece type.

Further, 21 is a switch board for operation, and during grinding, grinding oil is supplied to the position to be ground.

Usually, a tool to be ground is fixed on the workbench 14 and a jig that can be easily changed and removed is fixed, and the tool to be ground is mounted on this jig and the grinding process is carried out using the grindstone 5. The grinding position of the tool to be ground is determined by rotating the handle. In this case, the magnifying equipment 17 using the microscope is used for the part to be ground of the tool to be ground, and for example, the magnification equipment 17 using the microscope is used frequently during the correction work of the part to be ground. In this case, it is necessary to bring the objective section 18 of the microscope magnification equipment 17 close to the part to be ground.

For this reason, conventionally, when the work has progressed a little, the handle 8 is rotated to move the work plate 9 slightly forward, so that the objective section 18 is placed in a position where the grindstone 5 and its protective cover 22 do not become an obstacle. , respectively, determine the stopping position of the objective section 18 and the stopping position of the work plate 9, observe the grinding state with the microscope magnifying equipment 17 at these positions, and after the observation, return the microscope magnifying equipment 17 to the standby position, and again. The handle 8 is rotated to return the tool to be ground to the grinding position, and the process of starting grinding is repeated.

By the way, since the handle 8 is used for making fine cuts in the tool to be ground which is fixed on the cross table 12 on the swivel base 10, one rotation of the handle 8 normally causes only an extremely short advance or retreat of about 1 mm. Because there is no
If you try to separate it to a certain distance of about mm, it will take several tens of seconds.
It must be rotated twice. Rotating the handle 8 is also necessary because a certain distance from the grindstone 5 is required when attaching or detaching the tool to be ground from the fixture on the cross table 12.

If you look at it this way, during grinding work, you can move forward,
It will be understood that the rotational operation of the handle 8, which controls reverse movement, is a major factor in extremely reducing work efficiency. In addition, some of this type of equipment is configured so that the work panel 9 can be moved back and forth rapidly, but the weight of the moving part becomes large, and if the moving part is repeatedly moved back and forth rapidly, it may cause play in the moving mechanism. There is a risk that the grinding accuracy will gradually decrease.

Therefore, the present invention provides the above-mentioned work plate 9 on the side of the tool to be ground.
Instead of moving forward or backward, the spindle device 4 and the grinding wheel head 6 including the grinding wheel 5 are rapidly moved from one fixed position in the direction of the grinding wheel rotation axis to the other fixed position, or vice versa, as shown by arrow h. The handle 23 shown in the figure is configured to be moved and is designed to extremely efficiently perform the approach and return of the objective section 18, observation of the abrasive portion, and attachment and detachment of the tool to be ground as described above. By operating the grinding wheel 5, the grinding wheel 5 is moved to a certain position in the direction indicated by the arrow h, that is, in the direction in which the grinding wheel 5 approaches or moves away from the tool to be ground.

The mechanism will be explained below using the embodiment shown in FIG. The figure is a schematic diagram. Reference numeral 24 designates a grindstone head which is engaged on the base plate 2 of FIG. 1 so as to be able to slide in the direction of the rotation axis of the grindstone 5, and the grindstone 5 fixed thereon can move forward and backward in the direction of the arrow h.

A locking mechanism 25 is attached to the base plate 2 on the lower side of the grinding wheel head 24, and is engaged with a tapered lock pin 27 having a pinion portion by a rotary solenoid 26 and a gear that engages with the locking mechanism. and tapered lock pin 2
The tip of 7 is adapted to engage with an engaging portion 28, for example, a concave groove, formed on the side of the grinding wheel head 24, and is placed at a distance l from the engaging portion 28 and connected to the same grinding wheel head 2.
An engaging portion 28' is provided on the side of the locking mechanism 4 to form a locking mechanism. These locking mechanisms are arranged symmetrically on both sides. The figure shows that the lock pin 27 is engaged with the engaging portion 28.
29 is a stopper that protrudes from the lower substrate 2 side toward the upper whetstone head 24, 30 is a stopper that protrudes downward from the whetstone head 24, and the two sets of stoppers 29 and 30 cause the wheel to move in the direction of the arrow h. When the grindstone head 24 moves, the end positions of the forward and backward movements are independently regulated by the adjustment screw of the stopper 29, and this position is also the position where the lock pin 27 can engage.

The lower end of the handle 23 is connected to the rotating shaft 31 at one end of the rotating shaft 31 supported on the side of the lower substrate 2.
A limit switch 32 is integrally attached to the rotating shaft 31, and when the handle 23 is operated in the direction of the arrow i, the contact piece with the limit switch 32 is attached. 33 is pressed against it.

Therefore, when the handle 23 is now operated in the direction of the arrow i, each rotary solenoid 26 is energized and rotated by the limit switch 32, and the gear and the rack of the lock pin 27 are engaged, and the lock pin 27 is engaged with the lock pin 27 provided on the side surface of the base plate 24. from the section 28, and the lock is controlled to open. In this state, if you rotate the handle 23 from the front to the back of the page,
The rotating shaft 31 rotates together with the handle 23, and as will be described in detail later, an engagement mechanism provided on the back surface of the rotating shaft 31 and the grinding wheel head 24 allows the grinding wheel head 24 to rotate in the same direction as the handle 24, and to rotate the substrate. 2 and is stopped by the stoppers 29 and 30 mentioned above. When the handle 23 is released at this stop position, the rotary solenoid 26 is energized and rotates in the opposite direction at the same time as the limit switch 33 is released, and the lock pin 27 is controlled to enter the engaging portion 28' separated by a distance l.
The whetstone 5 fixedly supported by the whetstone stand 24 is fixed at a fixed position. FIG. 3 shows an example of the forward and backward movement mechanism surrounded by the dotted line A in FIG. The figure is shown in longitudinal section. 2
24 is a lower board, and 24 is an upper grindstone stand on which the grinding wheel 5 and spindle device are mounted and fixed. A rotating rod 34 is fixed on a rotating shaft 31 supported by the lower board 2. Rotatable rollers 35 are attached to the tip of the moving rod 34 on both sides.

The rotating rod 34 including the roller 35 is connected to the upper whetstone head 2.
4 is engaged with an engaging portion 36, for example, a groove. The engaging portion 36 is formed to have a depth that does not cause any trouble due to the rotation of the rotating shaft 31, since the roller 35 slides vertically on the wall surface of the engaging portion 36 as will be described later. As already explained in FIG. 2, if the handle 23 connected to the rotating shaft 31 is operated so that the limit switch 32 is turned on,
Since the lock pin 28 is removed, if you continue to rotate the handle 23, the rotating shaft 34, which is integrated with the rotating shaft in the direction of the arrow j, will engage the wheel head 24 side with its roller 35. Since the roller 35 is engaged with the engaging portion 36, the roller 35 presses the grindstone head 24 while moving up and down the side wall of the engaging portion 36, and moves to the position indicated by the dotted line indicating the movement position of the roller 35. The distance by which the grindstone head 24 is moved is the aforementioned l. Also roller 3
When reaching the dotted line position 5, the stopper explained in FIG. When turned off, the lock pin 27 is biased by the rotary solenoid 26 to fix the grindstone head 24 in the new changed position.

The wheel head 24 can be moved to a position beyond this locked position by a similar operation of the handle 23 in the opposite direction.

It will be well understood that the configuration described above allows the grindstone 5 fixed to the grindstone head 24 to be rapidly moved back and forth.

It was explained that in contrast to the type of device that moves the grinding wheel head like the device of the present invention, there is already a device that rapidly moves the tool to be ground. Therefore, the mechanism for forward and backward movement is simple, and manual operation is also easy.

Furthermore, the volume of the spacer allows it to be easily installed in devices that do not have a conventional rapid forward/backward movement mechanism. In addition, when the grinding wheel is repeatedly moved to the grinding position by the rapid movement of the grinding wheel head in the device of the present invention, the repeatability of the fixed position is ±1 μm, and it is 30 kgf from the front of the grinding wheel.
When a load is applied, the longitudinal displacement can be within 1 μm, and when a load of 30 kgf is applied from both left and right sides, the lateral displacement of the grindstone can be within 1 μm.

As explained above, according to the present invention, the grinding wheel head side is rapidly released from the fixed position by the lock pin combined with the rotary solenoid, and the grinding wheel head is moved forward or backward to a new position. Not only is it securely fixed and movement can be completed in a short time just by operating the handle, but the grindstone can also be fixed in place with high precision, allowing grinding work to be carried out with high precision and efficiency. I can do it.

[Brief explanation of the drawing]

FIG. 1 is an external view of one embodiment of the present invention. FIG. 2 is a schematic diagram showing a part of the mechanism of the embodiment shown in FIG. FIG. 3 is an example of a moving mechanism on the grindstone head side. 1...Base, 2...Lower board, 3...Handle, 4...
spindle device, 5... grindstone, 6... grindstone device, 7...
Board, 8... Handle, 9... Work board, 10... Swivel base, 11... Handle, 12... Cross table, 1
3...Handle, 14...Upper workbench, 15...Handle, 16...Strut, 17...Microscope magnification equipment, 18...Microscope objective part, 19...Enlargement projection part,
20...Handle, 21...Switch panel, 22...Protective cover, 23...Handle, 24...Whetstone head, 25...
Lock mechanism, 26...Rotary solenoid, 27
... Taper pin, 28, 28'... Engagement part, 29...
Stopper, 30...Stopper, 31...Rotary shaft,
32... Limit switch, 33... Contact piece, 34... Rotating rod, 35... Roller, 36... Engaging portion.

Claims (1)

[Claims] 1 Support the rotating shaft on the substrate that is the underside of the grindstone head,
A rotating rod is fixed to the rotating shaft, a grinding wheel table having a grinding wheel and a spindle device fixed to the lower substrate is engaged so as to be movable in the direction of the rotating shaft of the grinding wheel, and the rotating rod is fixed to the grinding wheel. while engaging the base;
A lock mechanism is formed on the lower substrate by a lock pin insertion/removal mechanism using a rotary solenoid and corresponding engaging portions provided at two predetermined positions on the grindstone head, and a handle attached to the rotation shaft. the locking mechanism is controlled by a switch attached to the handle by the operation of
At the same time, a grinding wheel head to which a grinding wheel and a spindle device are fixed is moved back and forth with respect to the lower substrate,
A rapid forward and backward movement device for the grinding wheel head of a tool grinder, which is characterized by being fixed in a fixed position.