JPH0426201Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a workpiece support device that supports a workpiece processed by an internal grinder.

(Prior Art) Conventionally, in an internal grinding machine that grinds the inner surface of a workpiece such as the outer race of a bearing, a workpiece support device that rotates while supporting the workpiece is known as a two-rotor, one-show type. Are known. This machine consists of a front plate that supports the workpiece by coming into contact with the front end of the workpiece, a pressure cylinder that presses and supports the rear end of the workpiece with a pressing part at the front end of the pressure plate, and a workpiece support drive means having a roller that rotates the workpiece while supporting the workpiece in the radial direction in cooperation with the shoe; The outer circumferential surface of the workpiece is supported at three points by workpiece support and drive means for rotation. And as an example of this,
Conventionally, as shown in, for example, Japanese Utility Model Application Publication No. 59-97839, there is a system in which the pressure plate is controlled by the discharge pressure of the pump and the negative pressure of the bench lily.

(Problem to be solved by the invention) By the way, in the above-mentioned conventional type, the presser cylinder is usually fixed to its support stand, and when the size of the workpiece to be ground changes due to changes in the specifications of the workpiece to be ground, etc. This problem is dealt with by removing the cover of the pressure cylinder and replacing the piston inside with one of a size corresponding to the new workpiece. But in that case,
Each time the size of the workpiece is changed, the presser cylinder must be disassembled, which poses a problem in that it takes time and effort to change the setup.

Moreover, since the pressure cylinder is disassembled, it is necessary to clean the piston during disassembly, and since the piston is positioned by the cylinder cover, the cover must be aligned accurately when reassembling after disassembly. There was also the problem that it required work to remove the paper.

The present invention was devised in view of the above points, and its purpose is to make the entire pressure cylinder mentioned above into a unit and to make it replaceable with respect to its support base, thereby reducing the size of the workpiece. The object of the present invention is to facilitate the setup change work when changing the engine, and to eliminate the work effort required for cleaning the piston and centering the cover.

(Means for solving the problem) To achieve this purpose, the solution of the present invention is as follows:
Basically, the structure follows the conventional structure, but the following improvements are made to the pressure cylinder and its surrounding structure.

That is, the configuration of the present invention includes a front plate that supports a workpiece to be processed by an internal grinder by coming into contact with its front end, a cylinder body each having a fluid supply/discharge port formed at a predetermined position, and the cylinder. It is fitted in the body in a reciprocating manner in an airtight manner,
and a piston having a pressing part at the front end that has a different size depending on the size of the workpiece, and the mounting parts of each of the cylinder bodies are provided with the same size and shape, and the rear end of the workpiece being machined. a plurality of types of pressure cylinders that press and support the workpiece with the pressing portion; a workpiece support drive means having a roller that rotates the workpiece while supporting the workpiece in its radial direction; The cylinder support base is configured to replaceably support the cylinder at the mounting portion of the cylinder body, and is provided with a communication path communicating with the fluid supply/discharge port of each pressure cylinder.

(Function) With this configuration, in the present invention, a plurality of types of pressure cylinders for pressing the workpiece toward the front plate are provided depending on the size of the workpiece, and each presser cylinder presses the workpiece toward the front plate. The support parts supported by the cylinder support base have the same shape and dimensions, and have pressing parts of different sizes at the front end of the piston, while the cylinder support base has the cylinder body of each pressure cylinder. is supported in a replaceable manner, so when changing the setup in response to a change in the size of the workpiece, the entire pressure cylinder must be removed from the cylinder support base, and the pressure cylinder can be replaced with the new workpiece size. It is only necessary to assemble a corresponding pressure cylinder, which makes it possible to perform setup change work easily. Furthermore, by replacing the entire pressure cylinder, there is no need for cleaning the piston or centering the cover.

Furthermore, since the cylinder support base is formed with a communication passage that can communicate with the fluid supply and discharge port of the cylinder body of each pressure cylinder,
Even if each presser cylinder is replaced, the communication path of the cylinder support base will automatically communicate with the fluid supply/discharge port of the cylinder body, making it possible to reliably supply and discharge working fluid to the presser cylinders. be.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 2 shows the overall structure of a workpiece support device for an internal grinder according to an embodiment of the present invention, and this internal grinder grinds the inner surface of a ring-shaped workpiece w to produce an outer race of a bearing. It is something. 1
2 is a base installed on the floor, 2 is a mounting stand erected on the base 1, and the upper end of the mounting stand 2 supports the workpiece w in contact with the front surface thereof. A front plate 3 and a cylinder support stand 4 are arranged facing each other in the front and rear, with a shoe 31 (described later) sandwiched between them in the lower half thereof, and with a predetermined interval corresponding to the thickness of the workpiece w. A workpiece supply path 5 having a closed cross-sectional shape and having the top surface of the shoe 31 as a bottom surface is formed between the front plate 3 and the cylinder support base 4. Further, a vertically extending charging chute 6 is integrally attached between the upper ends of the front plate 3 and the cylinder support base 4, and the upstream end of the workpiece supply path 5 is provided in the charging chute 6. A workpiece input path 7 with a closed cross section that communicates with 5a is formed, and in this input path 7, a large number of workpieces w, before grinding are carried.
w, . . . are inserted and held in a stacked state. Further, a through hole 8 having a closed cross section is formed between the front plate 3 and the cylinder support base 4 on an extension line of the workpiece supply path 5 in the upstream direction (to the right in the figure). A rod-shaped pusher 9 is slidably inserted into the pusher 8, and the rear end of the pusher 9 is connected to a cylinder (not shown).The extension of this cylinder causes the pusher 9 to slide. By moving the tip forward from the upstream end 5a of the workpiece supply path 5 to the downstream end 5b, a large number of workpieces w, w that have been charged into the workpiece input path 7 of the supply chute 6 are removed. , . . . are pushed out one by one to the downstream side of the workpiece supply path 5, starting from the one at the lower end, and are supplied to the grinding station S located on the downstream side thereof.

On the other hand, a discharge chute 1 is located on the downstream side (left side in the figure) of the workpiece supply path 5 with respect to the front plate 3 and the cylinder support base 4.
0 is installed in an inclined manner, and a workpiece discharge path 11 with an open upper part is formed through the discharge chute 10, and the workpiece w after processing is rolled by gravity through this discharge path 11. It is designed so that it can be discharged.

Further, as shown in an enlarged view in FIG. 1, a substantially conical grindstone insertion opening 12 is formed through the end of the front plate 3 on the side of the grinding station S, and a grindstone insertion opening 12 is formed through the grindstone insertion opening 12. The grindstone G is inserted from the front side (right side in FIG. 1) to grind the inner surface of the workpiece w located at the grinding station S between the front plate 3 and the cylinder support base 4. In addition, the above front plate 3
A sliding contact portion 3a made of a carbide chip is embedded around the grindstone insertion opening 12 on the rear surface, and is made of a carbide chip that slides into contact with the front end of the workpiece w during machining.

On the other hand, in the cylinder support base 4 located on the rear side of the front plate 3, a step-shaped cylinder mounting port 13 is connected to the grindstone insertion port 12 of the front plate 3.
This cylinder mounting port 1 is formed to penetrate corresponding to the cylinder mounting port 1.
3, the workpiece w being machined is placed on the front plate 3.
A plurality of types of pressure cylinders 14, 14, . . . (only one is shown), which are supported by pressing on the side, are fitted and supported in an exchangeable manner. Each of the pressure cylinders 14 has a cylinder body 16 that is positioned on the cylinder support base 4 and fixed with a bolt 15, and has a step-shaped fitting portion 16a at the front end that fits in the cylinder mounting port 13 in an airtight manner.
The cylinder body 16 is slidably and rotatably fitted in an airtight manner so that the internal space is divided into a forward chamber 18 and a backward chamber 19 by a pressure receiving portion 17a at the rear end. The workpiece is
and a substantially pipe-shaped piston 17 having a pressing portion 17b made of an inwardly flange-shaped carbide tip that comes into contact with and presses the piston. Each of these plurality of types of pressure cylinders 14, 14, . The size of the front end pressing portion 17b of the piston 17, specifically, only the flange inner diameter D thereof varies depending on the size of the workpiece w. Further, a through hole 1 communicating with the inside of the pipe-shaped piston 17 is provided in the rear cover 16b of each cylinder body 16.
6c is formed, and this cylinder body 16
Coolant is supplied to the grinding portion of the workpiece w through the through hole 16c and the inside of the piston 17.

The fitting portion 16a at the front end of the cylinder body 16 of each pressure cylinder 14 is provided with forward-side and backward-side air supply ports as fluid supply/discharge ports communicating with the forward-side chamber 18 and the backward-side chamber 19 therein, respectively. 20 and 21 are each pressure cylinder 1
4 are opened at the same predetermined position. On the other hand, the cylinder support 4 has a forward side and a backward side that communicate with the forward side and backward side air supply ports 20 and 21 of the cylinder body 16, respectively, when each pressure cylinder 14 is attached to the cylinder support stand 4. Communication passages 22 and 23 are formed, and each pressure cylinder 14 is connected through the forward communication passage 22.
By supplying air into the forward side chamber 18 of
While the piston 17 is moved forward to press and support the rear end of the workpiece w, when air is supplied into the retreat side chamber 19 of each pressure cylinder 14 through the retreat side communication passage 23, the piston 17 is moved backward to press and support the rear end of the workpiece w. It is configured to release pressure support on the rear end of the workpiece w.

Further, between the front plate 3 and the cylinder support base 4, a workpiece w, which is held between the front plate 3 and the front end pressing portion 17b of the piston 17 of each pressure cylinder 14, is placed on its outer peripheral surface. A pair of disc-shaped rollers 24 and 25 are rotatably supported and are rotated while being in contact with and supporting in the radial direction. These rollers 24 and 25 are arranged with their rotational axes parallel to each other, and as schematically shown in FIG. A rotating belt 30 is wound around the tension pulley 28a and the tension pulley 29.
The rotation of the pulleys 24 and 25 causes both pulleys 24 and 25 to rotate in the same direction. Further, a shoe 31 is fixed to the lower half between the front plate 3 and the cylinder support base 4.
A sliding contact piece 31a made of a carbide chip is integrally fixed to the tip of the shoe 31, and the sliding contact piece 31a is made of a carbide chip and is in sliding contact with the outer peripheral surface of the workpiece w being processed.
A and the outer circumferential surfaces of the rollers 24 and 25 constitute a workpiece support and drive means 32 that rotates and drives the workpiece w while supporting it at three points in the radial direction.

Next, the operation of the above embodiment will be explained.

First, in the operation start state, air is supplied to the retreating side chamber 19 of the pressure cylinder 14 attached to the cylinder mounting port 13 of the cylinder support base 4, and the piston 17 is in the retreating position.
In this state, the pusher 9 is
advances, and the workpiece input path 7 of the supply chute 6
Workpieces stacked and set on w,
w, .
4, 25 and the shoe 31, and rotates while being supported at three points on the outer circumferential surface by the outer circumferential surfaces of the rollers 24, 25 and the sliding contact piece 31a at the tip of the shoe 31. Next, air is supplied into the forward movement chamber 18 of the pressure cylinder 14 and the piston 17
moves forward, and as the piston 17 moves forward, the workpiece w is pressed by the pressing part 17b at its front end and pressed against the sliding contact part 3a of the front plate 3 on the front side, and as a result, the workpiece w is It rotates while being supported at three points on its outer periphery and at its front and rear ends. Incidentally, since the piston 17 which is in contact with the workpiece w at the pressing part 17b is rotatably provided with respect to the cylinder body 16, the piston 17 is in contact with the workpiece w.
Rotates following the rotation of.

In this state, the rotating grindstone G is inserted through the grindstone insertion opening 12 of the front plate 3, and the inner surface of the workpiece w is ground by the rotating grindstone G.

After this grinding, the workpiece w is moved to the roller 2.
4, 25, shoe 31, pressure cylinder 14
etc., in the reverse order to the above, and is then discharged through the workpiece discharge path 11 of the discharge chute 10, and thereafter the same operation as described above is repeated for each workpiece w.

Furthermore, when the size of the workpiece w changes due to a change in the specifications of the workpiece w, the pressure cylinder 14 is removed from the cylinder support base 4 and a different type of workpiece corresponding to the new size of the workpiece w is installed. The pressure cylinder 14 is then replaced.

At that time, a plurality of types of pressure cylinders 14 are prepared, and the pressure cylinder 14 has a pressing portion 17b that contacts and presses the rear end of the workpiece w in the piston 17.
The fitting part 1 of the cylinder body 16 to the cylinder support base 4 differs only in the size (flange inner diameter D).
Since the dimensions and shapes of the cylinders 6a are all set to be the same, each pressure cylinder 14 can be mounted on the cylinder support base 4 quickly and reliably. Furthermore, the forward and backward air supply ports 20 and 21 opened in the cylinder body 16 of each pressure cylinder 14 are positioned and set so as to communicate with the forward and backward communication passages 22 and 23 of the cylinder support base 4, respectively. Therefore, by simply positioning the cylinder body 16 of the pressure cylinder 14 in a predetermined position and fitting and fixing it into the cylinder mounting port 13,
The air supply/discharge path for operating the pressure cylinder 14 can be automatically communicated.

Therefore, in this case, when changing the setup due to a change in the size of the workpiece w, one pressure cylinder corresponding to the size of the workpiece w is selected from among the plurality of types of pressure cylinders 14, 14,... It is only necessary to select 14 and replace it with the one already installed, thus making it easy to change the setup when changing the size of the workpiece. Also, since the entire pressure cylinder 14 is replaced in this way,
The piston cleaning work and the centering work of the cylinder cover part, which are performed when disassembling the pressure cylinder, are no longer necessary, and the above-mentioned setup change work can be further facilitated.

It goes without saying that the present invention can be applied not only to manufacturing the outer race of a bearing as in the above embodiment, but also to an internal grinding machine for internally grinding other workpieces. .

(Effects of the invention) As explained above, according to the invention, the pressure cylinder itself for pressing and supporting the workpiece to be ground by the internal grinder toward the front plate is made into a unit to support the workpiece. By making the stand replaceable, it is possible to eliminate the need for cleaning the piston or centering the cylinder cover when changing the setup when the size of the workpiece is changed, making it easier to change the setup.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an enlarged cross-sectional view taken along the - line in FIG. 2, FIG. 2 is an overall front view of a workpiece support device of an internal grinder, and FIG. It is a schematic block diagram of a drive means. 3... Front plate, 4... Cylinder support base, 14... Pressure cylinder, 16... Cylinder body, 17... Piston, 17b... Pressing part, D... Flange inner diameter, 18... Advance side chamber, 1
9... Reverse side chamber, 20... Forward side air supply port, 2
DESCRIPTION OF SYMBOLS 1...Retreat side air supply port, 22...Advance side communication path, 23...Retreat side communication path, 24, 25...Roller, 31...Shu, 32...Workpiece support drive means, G... Grinding wheel, W... Workpiece, S... Grinding station.

Claims (1)

[Claims for Utility Model Registration] A workpiece support device for supporting a workpiece to be processed by an internal grinder, comprising: a front plate that abuts and supports the front end of the workpiece to be processed; A cylinder body with a fluid supply/discharge port formed at a predetermined position, and a piston that is fitted airtightly into the cylinder body so as to be able to reciprocate and has a pressing part at its front end that varies in size depending on the size of the workpiece. and a plurality of types of presser cylinders, each of which has the same size and shape as the mounting portion of each of the cylinder bodies, and which presses and supports the rear end of the workpiece being processed by the pressing portion; A workpiece support drive means having a roller that rotates the workpiece while supporting the workpiece in the radial direction; and a workpiece supporting drive means having a roller that rotates the workpiece while supporting the workpiece in the radial direction; 1. A workpiece support device for an internal grinding machine, comprising: a cylinder support base in which a communication path is formed that communicates with a fluid supply/discharge port of a tsusha cylinder.