JPS6232770Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a grinding device for a disc cutter that rotates on its own axis while revolving, and in particular, a grinding device that can compensate for both the amount of wear on the disc cutter and the amount of wear on the grindstone for polishing the cutter. This relates to a tracking device.

Many polishing machines of this type have been implemented in the past, such as the one shown in Japanese Utility Model Publication No. 54-44316, but these conventional devices have various disadvantages.

In other words, in conventional equipment, in order to compensate for the mutual decrease in the amount due to polishing of the disc knife and the grindstone, the grindstone was moved only parallel to the disc surface of the disc knife, and the grindstone and the disc knife came into contact with each other for polishing. However, the amount A by which the grinding wheel is moved to compensate for the amount of reduction due to grinding is:
This is much larger than the amount of movement B of the grindstone for correcting the amount of reduction that occurs when the disc cutter is polished (A>B). For example, if a disc cutter wears 1 mm in radius due to grinding and the whetstone does not wear out, and if only the whetstone wears 1 mm parallel to the disc surface of the disc cutter and the whetstone does not wear out, then If the angle formed with the plate knife is set to 15 degrees, the amount that the whetstone must be moved parallel to the disc surface of the disc knife will be as large as 3.86 mm. Therefore, the contact area between the disc cutter and the grindstone rapidly approaches the center of the rotation axis of the grindstone compared to before the movement. As described above, the following various drawbacks were observed due to the change in the relative positional relationship between the disc cutter and the grindstone over time.

(b) The grindstone is rotated by contact with the disc cutter, and is ground due to the difference in their trajectories and the difference in their rotational circumferential speeds, but when the trajectories change,
If the best setting positions of the disc cutter and the grindstone shift,
The speed at which the whetstone is rotated becomes slower, and the polishing becomes progressively worse. If you cut into something to be cut, such as a toilet roll, when the blade is not sufficiently polished, it will not be sharp, so you will have to move the whetstone so that it comes into stronger contact with the disk blade, but this will cause the blade to become sharper. The drawback was that the life of the whetstone was shortened.

(b) When the whetstone moves further than in (a) above and the contact area between the disc cutter and the whetstone comes to the center of the whetstone's rotation axis,
The whetstone would no longer rotate at all, and the disc knife would no longer be able to be polished, so it had the disadvantage of causing chipping on the cutting edge.

(c) Because the shaft that fixes the whetstone at the center of the whetstone protrudes inside the whetstone, if the whetstone moves parallel to the disk surface of the disk cutter and the contact area changes, the disk The disadvantage was that the knife would hit this shaft and damage the cutting edge. Additionally, the grindstone had to be removed early and replaced with a new one, resulting in a short service life.

(d) When the wear of the disc blade and the grinding wheel progresses due to automatic operation of the grinder, in order to reset the grinding wheel to the best relative position with respect to the disc blade, it is necessary to restore the amount corrected by the wear of the grinding wheel. The drawback was that it required a lot of time and skilled high-speed skills.

The present invention was devised to eliminate many of the drawbacks of these conventional devices, and consists of the following basic concept.

(1) In order to compensate for the wear of the disc cutter, a parallel feed mechanism is used that moves the grindstone in a direction parallel to the disc surface of the disc cutter, similar to the conventional one.

(2) In order to compensate for the wear of the grindstone itself, a new perpendicular feed mechanism that moves the grindstone in a direction perpendicular to the polishing surface is used at the same time as the above-mentioned parallel feed mechanism.

(3) The ratio of the feed amount between the parallel feed mechanism and the perpendicular feed mechanism can be changed depending on the type of the object to be cut and the material of the disc cutter and the grindstone. Here, it is assumed that the amount of ratchet is one mountain, and the feed amount of parallel movement 1 can be changed from one ratchet to five.

Next, an embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a conceptual diagram of the structure of the device of the present invention, which is roughly divided into a parallel feed mechanism 100 that feeds the grindstone parallel to the blade in order to correct the amount of wear on the disk blade; A grindstone wear correction mechanism (right angle feeding mechanism) 10 that feeds the grindstone almost perpendicularly to the cutter in order to correct the amount of grinding of the grindstone itself.
It consists of In FIG. 1, to explain the overall configuration, two arms 2 and 3 extend from a main rotating shaft 1, and a disc cutter 4 is attached to the arm 2 and is rotated from the main rotating shaft 1 by a transmission member 5. It is installed so that it can be used. When the main rotating shaft 1 rotates, the cutter 4 rotates around its own rotating shaft while revolving around it.

The other arm 3 extends in the form of a bridge so as to straddle the cutter 4, and its leading edge 3' is coaxial with the main rotating shaft 1 and has a rotating portion 6' of the rotor seal 6 attached thereto. In addition, in FIG. 1, the part surrounded by the two-dot chain line is the part rotated by the rotation of the main rotating shaft.

The bridge portion 3'' of the arm 3 includes the entire grindstone tracking device of the present invention, that is, the parallel feed mechanism 10 for the grindstone.
0 and a grindstone wear correction mechanism (right angle feed mechanism) 10 are supported.

First, when describing the parallel feed mechanism 100,
One end of a swinging arm 103 (see FIG. 2) is pivotally attached 104 to a piston rod 102 of an air cylinder 101 for parallel feeding, and the other end of the swinging arm 103 is connected to a piston rod 102 that is parallel to the disk surface of the cutter 4. (See Figure 1) A claw 107 is loosely fitted with a parallel feed screw shaft 105 and is pinned on the swing arm 103.
Then, a parallel feed ratchet 109 fixed to one end of the parallel feed screw shaft 105 is engaged. The parallel feed screw shaft 105 is inserted through a mounting plate 110 supported by the bridge portion 3'' of the arm 3, and a slide plate 112 is slidably guided on the mounting plate 110 in parallel with the disc surface of the cutter 4. is screwed onto the parallel feed screw shaft 105 at its female threaded portion 114.
The figure is an enlarged view of the parallel feed mechanism 100 seen from above in FIG. 1, where 108 is a spring member that presses the pawl 107 against the ratchet 109, and 111 is a stopper for the swing arm 103, for example. By displacing this stopper 111, the amount of parallel feed can be adjusted.

Next, the grindstone wear correction mechanism (right angle feed mechanism) 10
This is a pair of right angle feed air cylinders 12, 1 attached to the slide plate 112.
2' and the piston rod 13,1 of this cylinder.
Swinging arms 15, 15' pivotally mounted at 3' (Figs. 3 and 5), and right-angle feed screws loosely fitted to the other end of each arm and fixing ratchets 17, 17' to one end. Shafts 19, 19' (in the example shown, one threaded shaft 19 has a right-hand thread and the other 19' has a left-hand thread), and a ratchet 17, 17' pinned on each swing arm 15, 15'. Nails 2 that engage each other
0, 20' (a pressure material similar to the spring material 108 shown in FIG. 2 may be provided), and female threaded portions 22, 2
2', the grindstone holder 21 is screwed onto the right-angle feeding screw shafts 19, 19' and supported so as to be movable back and forth;
21', and support guide parts 23, 2 which rotatably support the screw shafts 19, 19' and slidingly guide the grindstone holder, and which are attached to the slide plate 112.
3'.

As can be seen from FIG. 1, the grindstone holders 21 and 21' are arranged in pairs, so only one of them 21 will be specifically described with particular reference to FIG. 4. A pressurizing chamber 26 is provided at the rear end of the holder 21 (on the side opposite to the cutter 4) via a bellophram 25, and a whetstone shaft 28 is rotatably provided at the opposite side of the pressurizing chamber 26 via a piston 27. The grinding wheel 33 is provided at a position 30 that can move forward and backward, and a grinding wheel 33 is attached to the tip of the grinding wheel shaft. Regarding the other holder 21',
The same numbers are shown with (') added.

Referring again to FIG. 1, 50 is an air source;
Three solenoid valves 5 are installed in the pipe 52 extending from here.
3, 54, and 55 are installed in parallel. Air pipes 56, 57, 58 from each solenoid valve are concentrated in one rotor seal 6, and exit again from the rotating portion 6' as three pipes 59, 60, 61.
The pipe 59 is connected to the cutter cooling pipe 63, and the pipe 6
0 is connected to each rod side of the parallel feed cylinder 101 and the perpendicular feed cylinders 12, 12', and is also connected to the pressurizing chambers 26, 26' of the grindstone holder.
Piping 61 is connected to each head side of the three air cylinders.

In the above configuration, when the disc cutter 4 rotates and cuts the object to be cut, such as a toilet roll, the solenoid valve 54 is intermittently opened to supply air to the pipe 57, the rotor seal 6, and the pipe. 6
0 to the pressurizing chambers 26, 26' of the grindstone holder, the grindstone comes into contact with the periphery of the cutter 4 as shown in FIG. 4 and performs polishing. This polishing is performed automatically and intermittently. At this time, air is also sent to the rod side of each cylinder, but the screw shafts 105, 19, 1 connected to each rod are simply retracted by the extending rod.
9' is not rotated.

After cutting and polishing are repeated a predetermined number of times, the solenoid valve 55 is periodically opened and air is sent through the pipe 58, rotor seal 6, and pipe 61. Then, each air cylinder 101, 12, 1
Air enters the bed side of 2', rod 102,
13, 13' are extended and rotate the parallel feed screw shaft 105 and the parallel feed screw shafts 19, 19' via the pawl and the ratchet, so that the slide plate 11
2 moves in a direction parallel to the disc surface of the cutter 4 to feed the grindstone in parallel, and at the same time, the grindstone holders 21 and 2
1' is moved in a direction perpendicular to the polishing surface to perform perpendicular feeding of the grindstone. In this way, the grinding wheel is always maintained in the best set positional relationship with respect to the cutting tool.

The effects of the present invention are as follows.

(1) Since the disc knife and the grindstone always come into contact at the best position, sufficient polishing is achieved and the best cutting power of the knife is always maintained.

(2) Since the blade sharpens well, there is no need for frequent polishing, so both the life of the disk blade and the life of the whetstone can be maintained for a long time.

(3) Since the diameter of the disc cutter is smaller than when it was new, there is no need to adjust the grindstone at all until it is removed. There is no need to stop the machine, and production efficiency can be significantly increased.

(4) No skill or advanced skills are required to set the disc knife and the grindstone, and the setting work is simplified.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of the configuration of an embodiment of the device of the present invention.
Figure 2 is an enlarged plan view of the parallel feed mechanism for the grindstone seen from above in Figure 1, Figure 3 is a front view of one side (right side in Figure 1) of the grindstone wear compensation mechanism (right angle feed mechanism),
FIG. 4 is a side view (view from the right side in FIG. 3), and FIG. 5 is a front view of the other grindstone wear correction mechanism (left side in FIG. 1). Main code: 12, 12'...Parallel feed air cylinder, 13,13'...Piston rod, 1
5, 15'... Swing arm, 17, 17'... Ratchet, 19, 19'... Screw shaft, 20, 20'...
...Claw, 21, 21'...Whetstone holder, 33, 3
3'...Whetstone.

Claims (1)

[Claims for Utility Model Registration] Parallel feed mechanism 100 for correcting the amount of wear on the cutter is included in the bridge portion 3'' of the arm 3 extending from the main rotating shaft 1 that straddles the cutter 4, and the amount of wear on the grindstone itself is corrected. The grindstone tracking device is provided with a right-angle feed mechanism 10 for the grinding wheel, and the parallel feed mechanism 100 is disposed on the bridge portion 3'' so as to be slidably guided in a direction parallel to the disc surface of the cutter 4. A parallel feed screw shaft 105 that is parallel to the surface of the blade disk is inserted and screwed into the slide plate 112 provided, and a parallel feed ratchet 109 fixed to one end of the parallel feed screw shaft 105 is connected to a parallel feed air cylinder. The slide plate 112 has a support guide part 23, which is rotated by a variable amount from 101.
The grindstone holders 21 and 21' are attached via the grindstone holder 23', and the right angle feeding mechanism 10 is connected to the grindstone holder 2.
1 and 21', and which are parallel to the grinding wheel shafts 28 and 28' that are perpendicular to the grinding surface of the cutter, are inserted into the grinding wheel holders 21 and 21' and screwed together. A ratchet 17 for right angle feed fixed to one end of the screw shafts 19, 19' for right angle feed is attached to the slide plate 112, and air for right angle feed is operated simultaneously from the same source as the air cylinder 101 for parallel feed. cylinder 1
2 and 12', and the parallel movement of the slide plate 112 with respect to the blade disk surface and the perpendicular movement of the grinding wheel shafts 28 and 28' with respect to the blade polishing surface are caused by air supply from the source. A grindstone tracking device for correcting the wear amount of a disc cutter and an abrasive grindstone, characterized in that the operations are performed simultaneously and at a variable ratio.