JPS5824229B2 - Toishikokansouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for changing flat-type grindstones, bullet-type grindstones, etc.

Conventionally, polishing work using a whetstone, especially complex internal polishing work, had to rely on manual labor.

However, the work environment was extremely poor due to dust and other factors, and improvements were hoped for.

Of course, automating the work would improve the situation, but it would also create a need for automatic replacement of the grindstone.

Considering replacing a small grindstone for polishing a complex shape, 5.
The whetstone must be replaced with a new one every 15 minutes.

In some cases, it may become necessary to replace the grindstone with a different type.

From the standpoints of compatibility and economy, the present invention provides a grinding wheel changing device that allows commonly used grinders to be used as is, does not require any special replacement attachments, and allows the grinding wheel itself to be easily removed and installed. The purpose is to provide

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the grindstone changing device according to the present invention comprises a flat grindstone removal and measurement device A, a nut attaching/detaching device B, a flat grindstone supply device C1, a bullet-type grindstone supply device D, and a bullet-type grindstone removal and measurement device E. , these independent devices are arranged on the same circumference of the rotating part.

A rotating device for moving each device arranged on the circumference to a predetermined position, a device for fixing the grinder,
and a device for setting a spanner to stop the rotation of the grinder.

Figure 2 shows a flat whetstone removal and measurement device A9. This has two V blocks 1 and 3 facing each other, and these V blocks 1 and 3 are moved toward and away from each other by the mechanism described below, and the flat whetstone (
(not shown) can be held.

2 is a rack fixed to V block 1, 4 is an opposing V
This is a rack fixed to block 3.

A pinion 5 is arranged exactly on the center line of the V block and meshes with the racks 2 and 4.

When the pinion 5 rotates, the V block approaches through the rack and grips the flat grindstone.

6 is a sliding guide part of the V block 3, and the block 3 is guided inside the V block outer frame 7 by this sliding guide part 6, and although not shown, the V block 1 side, which is always opposed by an elastic spring, is energized by

Furthermore, although not shown, it is possible to provide a limit switch related to the movement of the V-block 3 that is slidably guided (for example, a limit switch that is operated at the right end of the V-block cover 8 fixed to the V-block 3 is provided). ) It is possible to confirm that the whetstone has been gripped.

Furthermore, if a plurality of limit switches are provided on the movement path of the V block 3, the diameter of the grinding wheel can also be measured.

3 and 4 show a nut attachment/detachment device B. FIG.

The nut attachment/detachment device B has a central shaft 9 and a head 1 that slides back and forth.
0, a rotating part 11 and a fixed part 12.

A magnet 13 is attached to the tip of the central shaft 9, and is normally urged forward by a spring 14.

15 is attached to the rear end of the central shaft 9 by a dog, and the position of the central shaft 9 is confirmed by operating a limit switch (not shown).

The head 10 has a hexagonal hole 16 on the inside that engages with a nut, and a spline on the outside that slidably engages with a spline 18 of an outer spline cylinder 17.

The central axis 9 is located within the hexagonal hole 16 and concentrically therewith.

A spring holding plate 19 is always biased leftward by a coil spring 20 and holds the head 10 so that it does not move to the right.

The rotating part 11 consists of an outer spline cylinder 17 and a gear fixed to the outer spline cylinder 17.

The gear 21 is driven by a pinion 22 connected to a drive source.

A bearing 23 is provided on the fixed portion 12 and bears the outer spline cylinder 17.

The nut attachment/detachment device B operates as follows.

(1) Bring the nut attaching/detaching device B close to the grinder shaft fixed at a predetermined position.

(2) When the left end of the head 10 comes into contact with the nut fixing the grindstone, the head 10 is pushed backward against the spring 20.

(3) When the rotating part 11 is rotated by turning the gear 21, the nut and the hexagonal hole 16 are engaged, and the head 10 is returned to its original position by the spring 20.

(4) As the rotating part 11 continues to be rotated, the nut loosens, pushing the magnet 130 and pushing the central shaft 9 backward.

(5) When the nut comes off, the dog 15 at the rear end of the central shaft activates a limit switch, and it is detected that the nut has come off.

(6) Retract the device B with the nut attracted to the magnet 13.

(Power Moves to the next grindstone supply device.

Although the flat grindstone supply device C is not particularly shown, a type is used in which the grindstones are mounted in a double cylinder and fed one by one by pushing the grindstones with an air cylinder.

In this case, the lower half of the tip of the tube is cut off, and the whetstone is pressed upward by an air cylinder slightly forward and below the cut-off part, making it easier to take out.

5 and 6 show a supply device for a bullet-shaped grindstone.

The bullet-shaped grindstone 24 is supported by three guide rods 25.

The front end of the guide rod 25 reaches a part of the grindstone fixing disk 270 having the center hole 26.

Three square grooves 28 are equally spaced around the circumference in the center hole 26 of the grindstone fixing disk 27, and the end of the guide rod 25 is fitted into the square grooves 28.

This part of the guide rod 25 is cut out, and the coil spring 2 is attached to the tile.
9 is attached by an adjustment screw 30 so that the pressing force can be adjusted.

31 is a cylinder rod, and 32 is a connecting fitting attached to the tip of the cylinder rod 31.

33 is a dog, and when the cylinder rod 31 is operated,
The bullet-shaped grindstone is connected to the guide rod 25 through the dog 33.
It is guided by ...... and is fed toward the mounting shaft of the grinder (left side in the figure).

When the grindstone 24 is pressed against the grinder's grindstone mounting screw shaft, or when the grinder is rotated before that,
The most advanced grindstone 24 is a guide rod 25.
Because the grindstone is held by the force of the coil spring 29, the grindstone is screwed in against the rotation of the grinder.

Once screwed, free the cylinder rod 31,
Remove the grinder from the device and complete the supply of the grindstone.

FIG. 7 shows a bullet-type grindstone removal and measurement device E.

Reference numeral 34 denotes gripping metal fittings for the bullet-shaped grindstone, which are equally spaced around the circumference so that they can expand and contract in the radial direction.

Reference numeral 35 denotes a sleeve that transmits gripping force to the gripper 34 via the inclined wedge portion 36, and a gear 37 is provided on the outer surface of the right base of the sleeve.
Further, a female threaded portion 38 is provided on the inside.

39 is a pinion that transmits rotation from the motor 40 to the sleeve 37 and meshes with the gear 37.

41 is a main shaft, which is rotatably and slidably supported by bearings 42, 42.

43 and 44 are electromagnetic brakes attached to the right end of the main shaft 41.

The main shaft 41 is fixed by these electromagnetic brakes, and when the electromagnetic brakes are de-energized, the whole can rotate.

A sensor rod 45 is fitted into the center hole 46 of the main shaft 41, and connected at its end to a collar 48 fitted to the main shaft 41 by a connecting pin 47.

Reference numeral 49 denotes an axially elongated groove provided in the main shaft 41, and the connecting pin 47 can move left and right within this elongated groove 49.

When the bullet-shaped grindstone enters the gripping metal 34, the sensor rod 45
→ Connecting pin 47 → A microswitch (not shown) or the like is activated via the collar 48, and the length of the grinding wheel, whether or not it can be used continuously, etc. are confirmed.

Now, in order to replace the grindstone by checking the microswitch etc., the electromagnetic brake is turned on and the pinion 39 is rotated to drive the sleeve 35.

Since the male threaded portion of the main shaft 41 and the female threaded portion 38 of the sleeve are screwed together, the sleeve 35 advances to the left, and the grip fitting 34
grips the whetstone.

When the grinding wheel is gripped, the electromagnetic brake is turned off and the main spindle 4
Free 1.

Turn the pinion 39 once and turn the sleeve 35 in the direction to remove the grindstone.

As the grindstone comes off, the main shaft 41 retreats to the right, and the collar 48 activates a microswitch or the like to stop rotation and move the device away from the grinder.

Then, the main shaft 41 is returned to its original position by a spring (not shown).

When the removed grindstone is released from the gripping metal fitting 34, it is pushed outward by the spring and the sensor rod 45.

Now, the five devices A, B, C, D and E as described above are arranged on the same circle of the rotating section 50 (FIG. 1).

The rotating part 50 is appropriately rotated to perform a predetermined function at the lowermost position in FIG. 1 (in the figure, the flat grindstone removal device A is located).

In order to prevent the center position of the 500 rotations of the rotating part from changing even if the rotating part rotates left or right, separate stoppers are driven by cylinders depending on the direction of rotation, and the stoppers are applied to and stopped by a positioning plate (not shown) attached to the rotating part. .

Furthermore, the rotating part 50 is placed on a sliding table 51 that slides on a fixed table 52 to remove the grindstone, and can move back and forth.

With the above configuration, the grindstone exchange device operates as follows.

(1) When an old flat whetstone is attached to the grinder;
Remove the flat whetstone and use measuring device A to check whether or not it needs to be replaced.

If there is no need for replacement, continue work.

If there is a need for replacement, (b) Rotate the rotating part 50 to the position of the nut attaching/detaching device B.

Ha, remove Natsuto.

2. Rotate the rotating part 50 to the flat whetstone supply device C.

E. Push the grindstone with the air cylinder and place the frontmost grindstone on the grinder shaft.

The primary grindstone is held down by an air cylinder, and one new grindstone is supplied.

Then turn the rotating part 50 to the nut attaching/detaching device.

, press the grinder shaft against the nut being held,
Rotate the grinder and tighten the nut.

(2) When you want to install a bullet-shaped grindstone; a. Rotate the rotating part 50 to the bullet-shaped grindstone supply device.

b. Push the whetstone with the cylinder 31 and turn the grinder,
The screws are tightened.

(3) When a bullet-shaped grindstone is attached; Yes, check the length of the grindstone using the bullet-shaped grindstone measurement and removal device E, and if it is necessary to replace it, first release the electromagnetic brakes 43 and 44 and then remove the motor. Rotate 40.

Close the filter gripping device 34.

This state is detected by a detection device and the electromagnetic brakes 43, 44
Remove.

The gripping device 34 rotates counterclockwise while gripping the grindstone to remove the screw.

Attach a new flat or bullet-shaped whetstone as necessary.

By using the grindstone changing device of the present invention, grindstone polishing work including complicated internal polishing can be automated.

Further, when replacing the grindstone, a commercially available grinder can be used without requiring a special joint for replacement, which is very economical.

Additionally, the device can be used with almost any flat or direct screw type abrasive wheel with only dimensional changes.

[Brief explanation of drawings]

Fig. 1 is an overall front view of this device, Fig. 2 is an enlarged view of the flat grindstone removal device A, Fig. 3 is a front view of the nut attaching/detaching device B,
Figure 4 is a right side view of Figure 3, Figure 5 is a front view of the cannonball type grindstone supply device, Figure 6 is a right side view of Figure 5, and Figure 7 is the cannonball type grindstone removal and measurement device. Side sectional view. In the figure; A...-Flat grindstone removal and measurement device,
B...Nut attachment/detaching device, C...Flat grindstone supply device, D...Cannonball type grindstone supply device, E...
...Cannonball type grindstone removal and measurement device, 1...
・V block, 2...Rack, 3...
V block, 4...Rack, 5...Pinion, 6...Sliding guide section, 7...--V
Block outer frame, 8...V block cover, 9
・・・・・・Center axis, 10・---head, 11・
...Rotating part, 12...Fixed part, 13...
...Magnet, 14...Spring, 15...
・Dog, 16...°...Hexagonal hole, 17...
Outer spline tube, 18...Spline, 19
... Spring holding plate, 20 ... Coil spring, 21 ... Gear, 22 ... Pinion,
23...Bearing, 24...--Cannonball type grindstone,
25... Guide rod, 26...- Center hole (of the grinding wheel fixing disk), 27... Grinding wheel fixing disk, 28
...Square groove, 29 ...Coil spring, 30
・・・・・・Adjustment screw, 31・・・Cylinder rod, 32・・・Connection fittings, 33・・・Dog, 34・・・(Cannonball type) (grinding stone) grip, 3
5...Sleeve, 36...Wedge part,
37...Gear, 38...Female thread part, 3
9...Pinion, 40...Motor, 4
1...Main shaft, 42-...Bearing, 43, 44
---Nm brake, 45--sensor rod, 46--center hole (of main shaft), 47--
・・Connecting pin, 48・−・・−・Color, 49・・・・
... Long hole groove, 50 ... Rotating part, 51 ...
・Sliding part, 52...Fixed base.

Claims (1)

[Claims] 1. A sliding table that slides on a fixed table, a rotating part that is rotatably mounted on the sliding table, a flat grindstone removal and measurement device that is fixedly installed at a predetermined position on the same circumference of the rotating part, Consists of a nut attaching/detaching device, a flat whetstone supply device, a cannonball type whetstone supply device, and a cannonball type whetstone removal and measurement device, making it possible to measure the length and position of both flat and cannonball type whetstones, supply the whetstone, and attach and detach the whetstone. A grinding wheel exchange device characterized by: