JPH0232381Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] "Field of Industrial Application" The present invention relates to a grinding wheel correction device for a grinding machine, particularly a rotary dresser type grinding wheel correction device.

``Prior Art'' FIG. 5 is a sectional view including a diamond shaft to which a diamond wheel is attached of a conventional rotary dresser type grindstone correction device. 1a and 1b are grinding wheels 2
a and 2b are diamond wheels for correction. The diamond wheels 2a, 2b are fitted onto the diamond shaft 3 via a key 4, and are positioned in the axial direction by spacers 5A, 5B which fit into the diamond shaft 3. It is tightened by a lock nut 7 screwed into the.

One end of the diamond shaft 3 is fitted into a round hole 8a of a slide 8 of a feeder that advances and retreats toward the grinding wheels 1a and 1b, and is inserted into a tapered roller bearing 12 mounted back-to-back in a bearing box 11 fixed with bolts 9. Lock nut 13 fitted and screwed into the diamond shaft 3
The other end, which forms the tapered portion 3a, is pushed into the tapered hole 14a of the drive shaft 14 and connected thereto. The drive shaft 14 is rotatably mounted on the slide 8 and connected to a drive source. The illustrated arrow points to the worker's side.

"Problems to be Solved by the Invention" When changing the grindstones 1a and 1b due to changes in workpieces, it is often the case that only the grindstone 1b on the operator's side (front side) is changed. Therefore, even when replacing only the front diamond wheel 2b, in the conventional example, the entire bearing device that is integrated with the diamond shaft 3 rotatably supported by the slide 8 is removed, and the collar 6, which does not need to be replaced, is removed. Diamond wheel 2 behind the worker
a and spacer 5A must also be removed.
Therefore, when replacing a part of the diamond wheel 2b, it takes a lot of time as well as when replacing the entire diamond wheel 2b.

The outer circumferences of the diamond wheels 2a, 2b are required to have highly accurate roundness and concentricity with the diamond shaft 3.
Then, with the diamond shaft 3 and the diamond wheels 2a, 2b assembled, the outer circumferences of the diamond wheels 2a, 2b are formed. This diamond car 2a,
The outer periphery of the diamond wheel 2b is shaped when the diamond wheels 2a, 2b are newly manufactured or when the outer periphery of the diamond wheels 2a, 2b is modified.
B is technically highly advanced, with manufacturing and maintenance being carried out by specialized companies, so there are different specialties. Therefore, in order to remove the diamond wheels 2a, 2b together with the diamond shaft 3, remove the bolts 9 fixing the bearing box 11 to the slide 8, pull out the bearing box 11 from the slide's round hole 8a, and pull it in the axial direction. 14 taper holes 1
The tapered portion 3a at the shaft end of the diamond shaft 3 is removed from the shaft 4a. Next, the bolts 11b fastening the lid 11a to the bearing box 11 are loosened and removed, the lid 11a is removed, the lock nut 13 is disassembled, and the diamond shaft 3 is pulled out from the bearing 12. The diamond shaft 3 and the diamond wheels 2a, 2b are integrated, and the outer circumferences of the diamond wheels 2a, 2b are corrected by making the center holes at both ends of the diamond shaft 3 positive.

Further, depending on the outer peripheral shape of the grinding wheel 1, it is necessary to rearrange the diamond wheels 2a, 2b, and the diamond shaft 3 in which the diamond wheels 2a, 2b are assembled must be disassembled. To rearrange the diamond wheels 2a, 2b, remove the bolts 9 fixing the bearing box 11 to the slide 8, and disassemble the diamond wheels 2a, 2b, etc. with the diamond shaft 3 while still assembled to the bearing box 11. Next, remove the lock nut 7, pull out the diamond wheels 2a, 2b, spacer 5, and collar 6 from the diamond shaft 3, and place the diamond wheels 2a, 2 in line with the grinding wheel 1 required for the new work.
b to the diamond shaft 3, and the bearing box 11 is fixed to the slide 8 again. In order to do this, the concentricity of the diamond wheels 2a, 2b with respect to the diamond shaft 3 changes, and it takes time to reassemble the diamond wheels 2a, 2b, spacer 5, and collar 6. The number of parts increases, and problems arise in terms of storage management, such as keeping contact surfaces clean when assembling each part.

This invention solves the above problems and makes it easy to partially replace the diamond wheel, and since the diamond wheel and diamond shaft are assembled, it is easy to disassemble and maintenance is not required.The rotary diamond type grinding wheel is modified. The purpose is to provide a device.

[Structure of the idea]

"Means for Solving the Problem" The present invention has a diamond wheel that is equipped with a slide that can move forward and backward toward the outer periphery of the grinding wheel and is attached to a diamond shaft, and one end of the diamond shaft is mounted on the slide. The other end is removably connected to a diamond shaft support shaft which is rotatably supported by a slide, and the diamond support shaft is attached to and removably fixed to the slide. The connecting portions of the diamond shaft, the drive shaft, and the support shaft for the diamond shaft are fitted with tapered fitting portions, respectively, and the diamond shaft and the support shaft for the diamond shaft have a through hole passing through the axis. The drive shaft axis center is provided with a female thread in the tapered fitting part, and the through hole of the diamond shaft has an end through hole through which the shaft of a bolt that is screwed into the female thread of the drive shaft from the diamond shaft side is inserted. The head of the bolt whose diameter is enlarged from the hole and the end through-hole is accommodated, and the enlarged diameter part has a thumb screw, and the through hole of the diamond support shaft is screwed into the female thread of the diamond shaft. , a bolt for pulling together the diamond shaft and the support shaft for the diamond shaft is inserted, and a tool for rotating the bolt screwed into the drive shaft is inserted into the axial center of the bolt for pulling the diamond shaft and the support shaft for the diamond shaft. This is a rotary diamond type grindstone correction device with a through hole.

"Operation" As an example, when the bearing device is removed from the slide, the diamond shaft support shaft is in a state where it can be removed together with the bearing device. Next, when the diamond shaft is separated from the drive shaft, the above parts come off as one piece. There, the diamond shaft is disassembled while still supporting the diamond wheel. Removal of the diamond shaft and drive shaft and removal of the diamond shaft and support shaft for the diamond shaft can be performed separately from one side in the axial direction, and setup changes can be performed in a minimum amount of time.

"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 1 is a longitudinal cross-sectional view in the direction intersecting the grinding wheel axis.
FIG. 2 is a sectional view taken along the line AA in FIG. 1. The bed 15, which is integrated with or attached to the component frame of the grinding machine, has two traverse guides parallel to the grinding wheel axis of the grinding wheel 1 (the collective number 1a and 1b is 1). The rails 16, 16 are fixed, and the traverse body 17 is slidably fitted onto the traverse guide rails 16, 16. A traverse screw 18 rotatably supported by the bed 15 is screwed into the traverse body 17. As described above, a device for positioning the grindstone correction tool along the grinding surface of the grindstone so as to cross the surface of the grinding wheel is configured.

On the upper surface of the traverse body 17, there are two ball guide rails 19 in a cross-slide direction that are perpendicular to the traverse guide rail 16 and parallel in the horizontal plane.
19 is fixed, and the ball guide rail 19,1
The ball slide guides 21, 21 that engage with the slides 9 are fixed to the slide 8, which is a diamond cut body. A ball screw 20b is screwed into a ball nut 20a fixed to the slide 8, and a screw feeding device 20 including these is configured to feed the slide 8 to the traverse body 17, thereby making a cut. .
Although the explanation is omitted, the screw feeding device 20 is driven by a pulse motor. An electric motor 22 is attached to the base 2 at the rear of the slide 8 so that its axis is parallel to the diamond axis 3.
3, and a pulley 24 is fixed to the output shaft end of the electric motor 22.

FIG. 3 is an enlarged sectional view taken along the line BB in FIG. 1. A belt 25 is wound around a pulley 24 attached to the electric motor 22, and is wound around a pulley 27 fixed to the drive shaft 14 parallel to the grindstone axis. The drive shaft 14 is rotatably supported by a bearing 28 housed in a bearing housing portion 8b at the front end of the slide 8 so as not to move in the axial direction. The cover 29 fits into the round hole of the bearing housing part 8b, and the bearing 28
The oil seal 30 is held at the same time as the outer ring of the oil seal 30 is held. The lip of the oil seal 30 is the drive shaft 1
4 is sealed via an O-ring and rubs against the shaft sealing ring 31 which is fitted into the shaft.

A tapered portion 14b is provided at the output end of the drive shaft 14 and is fitted into a tapered hole 3c at one end of the diamond shaft 3. Numeral 32 is a groove 3b formed on the shaft end surface of the diamond shaft 3 and extending toward the center from both sides across the diameter of the drive shaft 14 to prevent rotation of a long screw protruding from the drive shaft 14. This is a preliminary means for preventing relative movement between the drive shaft 14 and the diamond shaft 3. The diamond shaft 3 has an enlarged diameter portion 3 in which the lower face of the neck of a hexagon socket head bolt 35 passing through an end through hole 33 of the diamond shaft 3 continues to the through hole 33.
By screwing the hexagon socket head bolt 35 into the female thread at the end of the drive shaft 14 until the seat 34 between the drive shaft 14 and the drive shaft 14 is pressed, the tapered hole 3c and the tapered portion 14b are brought into pressure contact.

The other end of the diamond shaft 3 has a tapered hole 3d, and a tapered portion 37a at the end of the diamond shaft support shaft 37 is fitted into the tapered hole 3d.The support shaft 37 has a through hole 38a in its center hole. A hexagon socket head bolt 38 is inserted and screwed into the diamond shaft 3. This through hole 38a is sized to loosely insert a hexagonal wrench that fits into the hexagonal hole in the head of the hexagon socket head bolt 35 that fixes the diamond shaft 3 to the drive shaft 14. 37b
is a female thread into which a tool (description will be omitted) is used when disassembling the diamond shaft 3 and the support shaft 37 for the diamond shaft. The support shaft 37 for the diamond shaft is supported by a bearing 40 so as to be allowed to move in the axial direction in the bearing box 39. One end of the bearing 40 contacts the step 37c of the diamond shaft support shaft 37, and is fixed by a nut 41 screwed into the support shaft 37.

The lip of the oil seal 43 housed in the shaft seal cover 42 hermetically fixed to the bearing box 39 is fitted into the diamond shaft support shaft 37 via an O-ring, and into the circumferential groove of the support shaft 37. Shaft retaining ring 44
It slides against the shaft sealing ring 45 fixed by. The end of the bearing box 39 is covered with a cover 4 with a sealing ring interposed therebetween.
6 is fixed with a bolt 47. A bolt 48 is inserted into the bearing box 39 parallel to the diamond shaft support shaft 37 and screwed into the slide 8.

FIG. 4 is a left side view of FIG. 3. Bearing box 39
This is for positioning the shaft center before screwing the bolt 48 parallel to the diamond shaft support shaft 37 into the slide 8, and its configuration is such that the slide 8 has a horizontal positioning surface 49 parallel to the diamond shaft 3, and a horizontal positioning surface 49 parallel to the diamond shaft 3. Following the horizontal positioning surface 49, a vertical positioning surface 50 is provided by steps, and the horizontal positioning surface 4
9 is in contact with a liner 51 fixed to the bearing box 39 , and the vertical positioning surface 50 is in contact with a runner 52 fixed to the bearing box 39 , and a bolt is inserted through a bolt hole provided diagonally upward to the right in the slide 8 . 53 into the bearing box 39, the liners 51, 5
2 are pressed against a horizontal positioning surface 49 and a horizontal positioning surface 50, respectively, for positioning.

The structure for attaching the diamond wheel 2 (general name) to the diamond shaft 3 includes a flange 3F on the drive side of the diamond shaft 3, and a collar 3h that abuts the flange 3F is fitted into the diamond shaft 3. The thickness of the collar 3h is made such that the left end surface of the collar 3h is located at the same axial position as the tapered hole 3c for each diamond shaft 3. The diamond shaft 3 includes the collar 3h, the diamond wheel 2a, the spacer 3i, and the diamond wheel 2b.
is inserted, a nut 3n is screwed in, and a pin 3e embedded in the axial direction of the flange 3F passes through the collar 3h and is loosely fitted to the diamond wheel 2a. The pins 3f and 3g installed in the axial direction of the spacer 3i are connected to the diamond wheels 2a and 2, respectively.
b is loosely fitted. Therefore, the concentricity of the diamond wheels 2a, 2b and the diamond shaft 3 is good, and there is no problem like the conventional example of key locking, and the inner diameters of the diamond shaft 3 and the diamond wheels 2a, 2b can be machined with high precision.

When the electric motor 22 is energized, the pulley 24 rotates, the pulley 27 rotates via the belt 25, and when the drive shaft 14 rotates, the diamond shaft 3 connected to the drive shaft 14 rotates, respectively. The diamond wheel 2 rotates while being supported by bearings 28 and 40 that support the shaft support shaft 37 . The outer periphery of the grindstone 1 is corrected by moving the slide 8 forward by a screw feeding device 20 including a ball nut 20a and a ball screw 20b.

To remove the diamond wheel 2 and diamond shaft 3 as a set, remove the cover 46 fixed to the bearing box 39 with the bolt 4.
7 and remove it to reveal the bolt 48 that fixes the bearing box 39 to the slide 8. Loosen the positioning bolt 53 and remove the bolt 48.

Next, loosen the hexagon socket head bolt 35 using a socket trench so that the head of the bolt 35 is aligned with the hexagon socket head bolt 38.
When the bolt 35 is turned even more forcefully in the loosening direction, the bearing device such as the bearing box 39 and the diamond shaft 3 with the diamond wheel 2 come off as one piece from the drive shaft 14, and then they are removed as one piece. Remove the diamond shaft support shaft 37 and the diamond shaft 3 by removing the bolts 38 from outside the machine.

Installation is done in the reverse order of the above. For assembly at this time, the bearing device including the bearing box 39 and the diamond shaft 3 are connected in advance with hexagon socket head bolts 38 outside the machine (at this time, the hexagon socket head bolts 35 are inserted in advance). ) After that, while turning the hexagon socket head bolt 35, lightly tighten the bearing device including the bearing box 39, which is the unit to which the diamond shaft 3 is connected, to the drive shaft 14, then slightly tighten the positioning bolt 53 to position it, and then tighten the bolt 48. Tighten,
Next, tighten the hexagon socket head bolt 35 to firmly clamp it.

In the above-described disassembly and assembly of the diamond shaft 3 with the diamond wheel, it is possible to change to another set of diamond shafts 3 with the diamond wheels 2a and 2b attached, or by unscrewing the nut 3n from the diamond shaft 3. It can be removed and the diamond wheels 2a and 2b replaced.

In contrast to the above, in order to quickly remove the diamond wheels 2a and 2b from the diamond shaft 3, first remove the bolts 38, remove the bearing device including the bearing box 39 in the same manner as above, and then remove the diamond shaft support shaft 37 and the diamond shaft 3. Separate the diamond wheel 2b or 2 by unscrewing the nut 3n and attaching the diamond shaft 3 to the drive shaft 14.
Both a and 2b can be exchanged. This allows the worker to easily remove only the diamond wheel 2b that is most frequently replaced.

Therefore, while the diamond shaft 3 remains connected to the drive shaft 14 mounted on the slide 8, only the bearing device of the support shaft 37 for the diamond shaft that is rotatably supported is removed, and the nut 3n is removed and replaced. Since only the diamond wheels that require the same amount of time need to be replaced, the setup changeover time is greatly reduced.

[Effect of idea]

The present invention is equipped with a slide that can move forward and backward toward the outer periphery of the grinding wheel, and has a diamond wheel attached to a diamond shaft, and one end of the diamond shaft is detachably connected to a drive shaft mounted on the slide. and the other end is removably connected to a diamond shaft support shaft that is rotatably supported on the slide, and the diamond support shaft is rotatably supported on a bearing device that is attached and removably fixed to the slide. The coupling portions of the drive shaft and the support shaft for the diamond shaft are fitted with tapered fitting portions, respectively, and the diamond shaft and the support shaft for the diamond shaft have a through hole passing through the shaft center, and the drive shaft center has a through hole passing through the shaft center. A tapered fitting portion is provided with a female screw thread, and the through hole of the diamond shaft has an end through hole portion through which a shaft portion of a bolt screwed into the female thread of the drive shaft from the diamond shaft side is inserted, and the end through hole portion. It has an enlarged diameter part that accommodates the head of the bolt whose diameter has been enlarged from above and has a thumb screw, and the through hole of the diamond support shaft is screwed into the female thread of the diamond shaft, and the diamond shaft and the diamond shaft support shaft are screwed into the through hole of the diamond shaft. A rotary diamond-type grindstone is inserted through which a bolt that pulls the diamond shaft and the support shaft for the diamond shaft is inserted, and the bolt that pulls the diamond shaft and the support shaft for the diamond shaft is provided with a through hole in the shaft center through which a tool for rotating the bolt screwed into the drive shaft is inserted. Since it is a correction device, the problem of assembly and disassembly, which was conventionally required to remove the diamond shaft from the bearing in the bearing box when installing the diamond shaft integrally with the diamond wheel, is eliminated and the time is reduced. You can disassemble and assemble the diamond wheel alone or the diamond shaft and diamond wheel as a set. Therefore, by preparing the diamond shaft and diamond wheel as a set for the required outer circumferential shape of the grinding wheel, it is no longer necessary to verify the concentricity of the diamond shaft and diamond wheel each time they are assembled, and the setup process is simplified. Changeover time is significantly reduced.

Furthermore, even when attempting to replace only the front side of a combination diamond wheel, conventionally it was necessary to remove other parts as well, but with the present invention, only the relevant parts need to be removed, which greatly reduces setup time. .

Although preferred disassembly and assembly examples have been described in the embodiment, since the diamond shaft is not directly supported by bearings, but is supported by bearing devices on both sides, it goes without saying that various disassembly and assembly are possible.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a sectional view taken along line B-B in Fig. 1.
FIG. 4 is an enlarged sectional view, FIG. 4 is a side view of FIG. 3, and FIG. 5 is a longitudinal sectional view of a conventional example. 1, 1a, 1b...Grinding wheel, 2, 2a, 2b
...Diamond wheel, 3...Diamond shaft, 3a...
Tapered part, 3b... groove, 3c, 3d... tapered hole, 4... key, 5A, 5B... spacer, 6...
...Collar, 7...Lock nut, 8...Slide, 8a...Round hole, 8b...Housing part, 9...
...Bolt, 11...Bearing box, 11a...Lid, 1
1b... Bolt, 12... Taper roller bearing, 1
3... Lock nut, 14... Drive shaft, 14a...
...Tapered hole, 14b...Tapered part, 15...Bed, 16...Traverse guide rail, 17...
Traverse body, 18...Traverse screw, 19...Ball guide rail, 20...Screw feeding device, 20a...Ball nut, 20b...
Ball screw, 21...Ball slide guide, 2
2...Electric motor, 23...Base, 24...Pulley, 25...Belt, 27...Pulley, 28...
Bearing, 29...Cover, 30...Oil seal,
31... Shaft sealing ring, 32... Rotation stopper, 33...
...Through hole, 34...Seat portion, 35...Hexagon socket head bolt, 36...Enlarged diameter portion, 37...Diamond shaft support shaft, 37a...Tapered portion, 37b...Female thread, 3
7c...Step, 38...Hexagon socket head bolt, 38a...
...Through hole, 39...Bearing box, 40...Bearing, 41
... Nut, 42 ... Shaft seal cover, 43 ... Oil seal, 44 ... Shaft retaining ring, 45 ... Shaft seal ring, 46 ... Cover, 47, 48 ... Bolt, 4
9... Horizontal positioning surface, 50... Vertical positioning surface, 51, 52... Liner, 53... Bolt.

Claims (1)

[Scope of utility model registration request] A slide 8 that can move forward and backward toward the outer periphery of the grinding wheel 1 is provided, and has diamond wheels 2a and 2b mounted on a diamond shaft 3, and the diamond shaft 3 has a drive shaft 14 whose one end is mounted on the slide 8. The other end is removably connected to a diamond shaft support shaft 37 which is rotatably supported by the slide 8, and the diamond support shaft 37 is attached to and removably fixed to the slide 8. The connecting portions of the diamond shaft 3, the drive shaft 14, and the support shaft 37 for the diamond shaft fit together at the tapered fitting portions, and the diamond shaft 3 and the support shaft 37 for the diamond shaft have their axes aligned with each other. It has a through hole through which it passes, and the drive shaft axis is provided with a threaded female thread in the taper fitting part, and the diamond shaft 3
The through hole is connected to the female thread of the drive shaft 14 by the diamond shaft 3.
It has an end through hole 33 through which the shaft of a bolt 35 that is screwed in from the side is inserted, and an expanded diameter portion 36 that accommodates the head of the bolt 35 whose diameter is expanded from the end through hole 33 and has a screw thread. A bolt 38 that is screwed into the female thread of the diamond shaft 3 and pulls the diamond shaft 3 and the support shaft 37 for the diamond shaft is inserted into the through hole of the support shaft 37 for the diamond shaft. The bolt 38 that pulls the shaft 37 is a rotary diamond type grindstone correction device, in which a through hole 38a is provided at its axial center through which a tool for rotating the bolt 35 screwed into the drive shaft 14 is inserted.