JP2020175449A - Grinding device and grinding method of vane groove - Google Patents

Abstract

To provide a grinding device of a vane groove which enables improvement of durability of a grind stone and simplification of a configuration of a device for rotating the grind stone and can be provided at a low price.SOLUTION: A grinding device of a vane groove is provided with: an annular grind stone 1 formed into a ring shape in a size such that the annular grind stone 1 can enclose an outer periphery of a workpiece W; and a rotation mechanism 10 which supports the annular grind stone 1 in a swingable manner in a through hole W1. An outer surface of the workpiece W is introduced into the annular grind stone 1 from an insertion port 4 formed at the annular grind stone 1. The annular grind stone 1 is inserted into the through hole W1 of the workpiece W. The annular grind stone 1 is rotated through the rotation mechanism 10 located at the outer side of the workpiece W.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vane groove grinding device and a grinding method for grinding vane grooves formed in a cylinder of a rotary compressor, a cylinder of a vane pump, and the like.

Conventionally, broaching is known as a device for grinding this type of vane groove. This broaching is a grinding process using a tool called a broach in which a rough blade, a semi-finishing blade, and a finishing blade are arranged on a rod-shaped shaft while increasing the dimensions in order. By inserting a brooch into the guide hole made in the workpiece and pulling it out, it is possible to make a hole with the dimensions of the finishing blade. However, this broaching process is not suitable for grinding vane grooves formed in rotary compressors and vane pumps because the grinding equipment becomes large.

As a grinding device that replaces this broaching process, for example, the devices described in Patent Document 1 and Patent Document 2 have been proposed.

The grinding device described in Patent Document 1 is a "shaft-integrated grindstone base 14" in which a "grinding head body 4" is inserted into a through hole of a work such as a compressor cylinder and is projected from the "grinding head body 4". It is a device that grinds a groove by fitting a member into a vane groove from the through hole side.

In Patent Document 2, a "grindstone disk 11" is provided in the "grindstone disk holder 33", the "grindstone disk holder 33" is inserted into a through hole of the work, and a vane groove is formed in the "grindstone disk 11". It is a device for grinding.

As described above, all the conventional vane groove grinding devices have a configuration in which the vane groove is ground by inserting the device for rotating the grindstone and the grindstone into a through hole of a compressor cylinder or the like in a combined state.

Japanese Patent No. 3539090 Japanese Patent No. 3510864

However, in the configuration in which the device for rotating the grindstone and the grindstone are inserted into the through holes of the compressor cylinder to grind the vane groove, the grindstone has to be extremely small. Therefore, there is a problem that the durability of the grindstone becomes extremely short. That is, when the vane groove is ground by rotating a grindstone disk having a very small diameter, the grindstone wears severely and must be replaced with a new grindstone at all times.

Moreover, since the structure is such that the grindstone and the device for rotating the grindstone are inserted into the through hole, this rotating device has an extremely precise configuration. Therefore, the replacement work of the grindstone becomes complicated, and the manufacturing cost becomes extremely high.

Therefore, the present invention was created to solve the above-mentioned problems, and it is possible to dramatically improve the durability of the grindstone in a device for grinding a vane groove formed in a through hole of a compressor cylinder. Moreover, it is an object of the present invention to provide a vane groove grinding device and a grinding method that can be provided at low cost by simplifying the configuration of the rotating device for rotating the grindstone.

In order to achieve the above object, the first means in the present invention is to insert a grindstone for grinding into the through hole W1 of the work W and grind the vane groove W2 continuous with the through hole W1 in the through hole W1. The annular grindstone 1 is provided with an annular grindstone 1 in which a plate-shaped grindstone inserted in a state orthogonal to the work W is formed in a ring shape surrounding a side surface portion of the work W, and a rotation mechanism 10 for rotating the annular grindstone 1. , The holder body 2 that holds the inner peripheral edge side of the annular grindstone 1, the internal gear 3 formed on the inner surface of the holder body 2, and a part of the annular grindstone 1 are notched together with the holder body 2 and the internal gear 3. The rotating mechanism 10 includes a plurality of rotary gears 11 that mesh with the internal gear 3 of the holder body 2 and a fixed plate body 12 that rotatably supports and fixes the rotary gear 11. , The annular grindstone 1 is introduced so as to intersect the through hole W1 of the work W from the insertion port 4 of the annular grindstone 1, and the vane groove W2 is ground by the annular grindstone 1 rotating from the inside to the outside of the through hole W1. It is in the configuration.

The rotation mechanism 10 of the second means includes a drive gear 14 rotated by a motor 13, an interlocking gear 15 interlocked with the drive gear 14, and the rotary gear 11 rotating with the rotation of the interlocking gear 15. It includes the fixed plate body 12 that holds a plurality of rotary gears 11.

The third means is to provide a grindstone holding structure 20 for holding the annular grindstone 1 on the fixed plate body 12 of the rotating mechanism 10, and the grindstone holding structure 20 can rotate the inner surface of the holder body 2. It is provided with a plurality of support rollers 22 for supporting the support rollers 22, a bracket 21 for fixing the support rollers 22 to the fixed plate body 12, and a sensor 23 for confirming the position of the insertion port 4.

The fourth means constitutes a work moving mechanism 30 for introducing the annular grindstone 1 into the insertion port 4 of the annular grindstone 1, and the work moving mechanism 30 includes a motor 33 capable of forward and reverse rotation and the motor. The work having a moving screw body 31 that rotates at 33 and a work table 32 that is screwed to the moving screw body 31 and moves along the longitudinal direction of the moving screw body 31 and is fixed on the work table 32. W is configured to move from the insertion port 4 of the annular grindstone 1 into the annular grindstone 1.

The fifth means is to grind the vane groove W2 vane groove continuous from the through hole W1 formed in the work W, in which a plate-shaped grindstone for grinding the vane groove W2 is formed into a substantially C-shaped ring shape. Using an annular grindstone 1, the annular grindstone 1 is introduced so as to intersect into the through hole W1 of the work W, and the annular grindstone 1 is rotated from the inside to the outside of the through hole W1 to grind the vane groove W2. In the way.

As in the present invention, the annular grindstone 1 is introduced so as to intersect the through hole W1 of the work W from the insertion port 4 of the annular grindstone 1, and the vane groove W2 is formed by the annular grindstone 1 that rotates from the inside to the outside of the through hole W1. By being configured to grind, when grinding the vane groove W2 from the through hole W1, it is possible to grind using a large annular grindstone 1. As a result, the durability of the grindstone can be dramatically improved as compared with the conventional grindstone having an extremely small diameter.

Moreover, since it is not necessary to configure the rotating device for rotating the grindstone to be a small and precise rotating device to be inserted into the through hole, it is possible to provide the rotating device at low cost.

Further, a holder body 2 that holds the inner peripheral edge side of the annular grindstone 1, a plurality of rotary gears 11 that mesh with the internal gear 3 of the holder body 2, and a fixing plate that supports and fixes the rotary gear 11 in the internal gear 3. The rotating mechanism 10 provided with the body 12 can reliably hold the substantially ring-shaped annular grindstone 1 and rotate it in the through hole W1.

Further, a plurality of support rollers 22 that rotatably support the inner surface of the holder body 2, a bracket 21 for fixing the support rollers 22 to the fixing plate body 12, and a sensor 23 for confirming the position of the insertion port 4 are provided. By attaching the grindstone holding structure 20 to the fixed plate body 12 of the rotating mechanism 10, the positions of the annular grindstone 1 and the work W can be accurately maintained, and the vane groove W2 can be precisely ground.

Further, the work W can be accurately moved into the annular grindstone 1 by the configuration of the work moving mechanism 30 that introduces the work W fixed on the work table 32 into the insertion port 4 of the shaped grindstone 1.

As described above, according to the present invention, the durability of the grindstone can be dramatically improved, and the configuration of the device for rotating the grindstone can be simplified, so that the grindstone can be provided at a low cost. I achieved my goal.

It is a schematic perspective view which shows the annular grindstone of this invention. It is a schematic plan sectional view which shows the annular grindstone in a work. (A) is a schematic view showing a work before grinding, and (b) is a schematic view showing a work at the time of grinding. It is the schematic which shows the state which determines the position of the insertion opening of the annular grindstone of this invention. It is the schematic which shows the rotation mechanism and the grindstone holding structure of this invention. It is the schematic which shows the work moving mechanism of this invention. It is the schematic which shows the drive gear based on the arrow VII-VII line shown in FIG. It is the schematic which shows the dresser of this invention.

In the present invention, a cylinder of a rotary compressor, a cylinder of a vane pump, or the like is used as a work W, and the vane groove W2 of the work W is ground. That is, it is an apparatus and method for grinding a vane groove W2 vane groove continuous from the through hole W1 formed in the work W (see FIG. 1).

In the grinding method of the present invention, an annular grindstone 1 formed in a substantially C-shaped ring shape is used as a plate-shaped grindstone for grinding the vane groove W2 (see FIG. 1). Then, the annular grindstone 1 is introduced so as to intersect the through hole W1 of the work W, and the annular grindstone 1 is rotated from the inside to the outside of the through hole W1 to grind the vane groove W2 (FIG. FIG. 2).

In the apparatus of the present invention, in order to form a substantially C-shaped annular grindstone 1, a notch-shaped insertion port 4 is formed in a part of the annular grindstone 1. Further, the annular grindstone 1 is provided with a holder body 2 and an internal gear 3 (see FIG. 1).

The holder body 2 is a portion that holds the inner peripheral edge side of the annular grindstone 1 (see FIG. 1). Further, an internal gear 3 is provided around the inside of the holder body 2. A part of the holder body 2 and the internal gear 3 is also cut out by the insertion port 4 formed in the annular grindstone 1.

The illustrated holder body 2 has a structure in which a storage recess 2A is formed along the outer peripheral edge of the holder body 2 and the annular grindstone 1 is fitted into the storage recess 2A (see FIG. 2). Then, the side surface of the annular grindstone 1 fitted in the storage recess 2A is sandwiched by the sandwiching body 2B, and the sandwiching body 2B is screwed with the fixing screw 2C. Therefore, the structure is such that the annular grindstone 1 can be easily replaced and maintained.

Further, the holder body 2 is provided with a positioning portion 2D for detecting the position of the insertion port 4 (see FIG. 4). The positioning unit 2D is a portion detected by a sensor 23 described later, and the position of the positioning unit 2D detects the position of the insertion port 4.

The apparatus of the present invention includes a rotating mechanism 10, a grindstone holding structure 20, and a work moving mechanism 30 in order to rotate the annular grindstone 1 arranged in the through hole W1.

The rotation mechanism 10 has a configuration in which the annular grindstone 1 is rotated by meshing with the internal gear 3 of the holder body 2 that holds the annular grindstone 1 (see FIG. 3). The illustrated rotation mechanism 10 includes a rotary gear 11 and a fixed plate body 12 (see FIG. 1). The rotary gear 11 is a plurality of gears that mesh with the internal gear 3 of the holder body 2.

The rotary gear 11 shown in the figure uses four internal gears 3 arranged at opposite positions of the internal gear 3 (see FIG. 3). By arranging the internal gear 3 in this way, even if any one of the internal gears 3 reaches the position of the insertion port 4, the other three can stably rotate the annular grindstone 1.

In order to rotate these rotary gears 11 at the same time, a drive gear 14 and a plurality of interlocking gears 15 are used (see FIG. 7). The drive gear 14 is a gear that is rotated by a motor 13, and a plurality of interlocking gears 15 meshed with the drive gear 14 rotate at the same time (see FIG. 5). Each of the rotary gears 11 connected to the interlocking gear 15 rotates together with the interlocking gear 15 at the same time.

On the other hand, the fixed plate body 12 is a plate-shaped member that supports the rotary gear 11 so that the rotary gears 11 mesh with the internal gear 3 (see FIGS. 1 and 3). The illustrated fixed plate body 12 is installed between the interlocking gear 15 and the rotary gear 11 (see FIG. 5). Further, the fixed plate body 12 has a rectangular shape and has a configuration in which rotary gears 11 are held at four corners (see FIG. 3). Further, since the fixed plate body 12 is installed near the annular grindstone 1, the insertion port 12A is provided so as not to prevent the work W from entering (see FIGS. 1 and 3).

The grindstone holding structure 20 is attached to the fixed plate body 12 of the rotating mechanism 10 (see FIG. 5). The grindstone holding structure 20 is configured to hold the annular grindstone 1 rotated by the rotary gear 11 together with the holder body 2, and includes a plurality of support rollers 22 that rotatably support the inner surface of the holder body 2. The support roller 22 is rotatably supported by the fixed plate body 12 via the bracket 21.

Further, the grindstone holding structure 20 is provided with a sensor 23 for detecting the insertion port 4 of the annular grindstone 1 held by the grindstone holding structure 20 (see FIG. 5). This sensor 23 is used to keep the position of the insertion port 4 of the annular grindstone 1 at a fixed position. That is, when the sensor 23 senses the positioning portion 2D formed on the side surface of the holder body 2 (see FIG. 5), the direction of the insertion port 4 is set to face the position of the work W (see FIG. 4). In this way, the work W is introduced into the insertion port 4 after the position of the insertion port 4 and the position of the work W are matched by the sensor 23. Although the positioning portion 2D shown in the figure is formed in a concave shape, it is not limited to the illustrated example and may be any means for detecting the sensor 23.

In order to introduce the annular grindstone 1 into the through hole W1 of the work W, one of the case of moving the annular grindstone 1 and the case of moving the work W, or both can be selected. In the illustrated example, in order to improve the accuracy of the grinding work by the annular grindstone 1, the work moving mechanism 30 that moves the work W with respect to the annular grindstone 1 fixed at a fixed position is configured (see FIG. 6).

In the illustrated work moving mechanism 30, the moving screw body 31 is interlocked with the motor 33 that can rotate in the forward and reverse directions, and the work table 32 is screwed to the rotating moving screw body 31 so that the work table 32 can be moved forward and backward freely. It is configured (see FIG. 6). Then, the work W fixed on the work table 32 is configured to move from the insertion port 4 of the annular grindstone 1 into the annular grindstone 1.

Further, in the present invention, a dresser unit 40 for re-polishing the annular grindstone 1 is provided (see FIG. 8). The dresser 40 re-polishs the annular grindstone 1 by applying the dresser unit 40 to the rotating annular grindstone 1.

The present invention is not limited to the illustrated configuration, and the design can be freely changed without changing the gist of the present invention. Further, the use examples of the present invention are not limited.

W work W1 Through hole W2 Vane groove 1 Circular grindstone 2 Holder body 2A Storage recess 2B Insertion body 2C Fixing screw 2D Positioning part 3 Internal gear 4 Insertion port 10 Rotating mechanism 11 Rotating gear 12 Fixed board body 12A Insertion port 13 Motor 14 Drive Gear 15 Interlocking gear 20 Grinding stone holding structure 21 Bracket 22 Support roller 23 Sensor 30 Work moving mechanism 31 Moving screw body 32 Work table 33 Motor 40 Dresser

A fifth means is an annular grindstone in which a plate-shaped grindstone for grinding the vane groove W2 is formed into a substantially C-shaped ring shape in a method of grinding a vane groove W2 continuous from a through hole W1 formed in the work W. Using 1, the annular grindstone 1 is introduced so as to intersect the through hole W1 of the work W from the insertion port 4 of the annular grindstone 1 in which a part of the annular grindstone 1 is cut out, and the annular grindstone 1 is inserted into the through hole W1. There is a grinding method for grinding a vane groove W2 by rotating the vane groove W2 from the inside to the outside.

Claims (5)

In an apparatus in which a grindstone for grinding is inserted into a through hole of a work and a vane groove continuous with the through hole is ground.
It is provided with an annular grindstone in which a plate-shaped grindstone inserted orthogonal to the through hole is formed in a ring shape surrounding the side surface of the work, and a rotation mechanism for rotating the annular grindstone.
The annular grindstone has a holder body that holds the inner peripheral edge side of the annular grindstone, an internal gear formed on the inner surface of the holder body, and an insertion port in which a part of the annular grindstone is cut out together with the holder body and the internal gear. And
The rotary mechanism includes a plurality of rotary gears that mesh with the internal gears of the holder body, and a fixed plate body that rotatably supports and fixes the rotary gears.
The vane groove is characterized in that the annular grindstone is introduced so as to intersect the through hole of the work from the insertion port of the annular grindstone, and the vane groove is ground by the annular grindstone that rotates from the inside to the outside of the through hole. Grinding device. The rotating mechanism includes a drive gear that is rotated by a motor, an interlocking gear that is interlocked with the drive gear, the rotary gear that rotates with the rotation of the interlocking gear, and a fixed panel body that holds a plurality of rotary gears. The vane groove grinding apparatus according to claim 1. A grindstone holding structure for holding the annular grindstone is provided on the fixed plate body of the rotating mechanism, and the grindstone holding structure includes a plurality of support rollers that rotatably support the inner surface of the holder body, and the support rollers. The vane groove grinding device according to claim 1, further comprising a bracket for fixing the blade to the fixed plate body and a sensor for confirming the position of the insertion port. A work moving mechanism for introducing the annular grindstone into the insertion port of the annular grindstone is configured, and the work moving mechanism includes a motor that can rotate forward and reverse, a moving screw body that is rotated by the motor, and the moving screw. A work table that is screwed to the body and moves along the longitudinal direction of the moving screw body is provided, and the work fixed on the work table is configured to move into the annular grindstone from the insertion port of the annular grindstone. The vane groove grinding device according to claim 1. Continuous vane groove from a through hole formed in a work In a method of grinding a vane groove, an annular grindstone formed by forming a plate-shaped grindstone for grinding a vane groove into a substantially C-shaped ring shape is used, and the annular grindstone is used as a work. A method for grinding a vane groove, which is introduced so as to intersect in the through hole of the above, and the vane groove is ground by rotating the annular grindstone from the inside to the outside of the through hole.

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