JPH07276175A - Work feeding device - Google Patents

Abstract

PURPOSE:To provide a work feeding device provided with a device to automatically insert/remove into/from a work a chattering vibration preventing jig to be used in machining a hollow cylindrical work. CONSTITUTION:A work feeding device consists of a jig which inserts a core into an elastic material and forms a holding part on one end, a jig chuck 2b to hold the holding part of this jig, a moving means which modes a work W in the axial direction of the jig to be held by the jig chuck 2b and inserts the work into the jig, and a carrying means 3 to carry the work W with the inserted jig between a machine tool 1 and the jig chuck.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workpiece supply device used for processing a thin hollow cylindrical workpiece. More specifically, the present invention relates to a device for automatically supplying and removing a workpiece in which a chatter vibration preventing jig used for machining a hollow cylindrical workpiece is automatically inserted into and removed from the workpiece.

[0002]

2. Description of the Related Art Chatter vibration is generated on a work when grinding a thin hollow cylindrical work, and the working accuracy is deteriorated. For this reason, conventionally, a jig made of an elastic material such as rubber is inserted into the hollow cylindrical workpiece to perform machining while absorbing chatter vibration during processing. However, in order to perform these operations, it is necessary to insert a jig made of an elastic material into a workpiece in advance before processing, and to remove them after processing.
For this reason, there are many inefficient manual operations, and it is necessary to prepare jigs made of an elastic material for the number of workpieces, which causes problems in terms of cost and storage space.

[0003]

SUMMARY OF THE INVENTION In view of the above problems, the present invention automatically supplies a workpiece to a machine tool without attaching a jig made of an elastic material to the hollow cylindrical workpiece in advance. In addition, it is an object of the present invention to provide a work supply device capable of automatically performing a work of inserting and removing a jig made of an elastic material as a series of flows in association with the removing operation.

Another object of the present invention is to provide a work supply device capable of efficiently performing work with only one jig without stocking jigs made of elastic material.
Furthermore, the present invention provides a workpiece supply device which does not damage the machined surface of a workpiece during a series of operations in which a jig made of an elastic material is inserted into a hollow cylindrical workpiece, processed and removed. Is what you are trying to do. Furthermore, the present invention is intended to provide a workpiece supply device capable of smoothly inserting and removing a jig made of an elastic material without deforming a hollow cylindrical workpiece.

[0005]

In order to solve the above-mentioned problems, the present invention relates to a jig having a core material inserted into an elastic material and having a grip portion for the core material formed at one end, and a grip portion for the jig. The jig chuck that grips the jig and the jig and the workpiece gripped by the jig chuck are arranged on the same axis line, and the workpiece and the jig are relatively moved in the axial direction, and the jig becomes the workpiece. It is composed of a moving means for inserting and a carrying means for carrying the workpiece into which the jig is inserted between the machine tool and the jig chuck.

Further, according to the present invention, the moving means has a pushing member for pushing one end of the workpiece to move the workpiece and inserting the pushing member into the jig.

Further, according to the present invention, the conveying means has an inner diameter gripping means for conveying a workpiece from a machine tool to a jig chuck.

[0008]

With the structure of the solution means, the jig made of the elastic material is held by the jig chuck by the holding portion of the core material at one end thereof, and the workpiece and the jig made of the elastic material are on the same axis. One of the workpiece and the jig is arranged relatively in the axial direction by the moving means, and the workpiece is inserted into the outer periphery of the jig. Next, the workpiece is conveyed to the machine tool by the conveying means and processed. After the processing is completed, the workpiece is again conveyed to the jig chuck by the conveying means, the grip portion at one end of the jig is grasped by the jig chuck, and the conveying means is moved to remove the jig from the workpiece. At this time, the work piece is pushed into the jig by pushing one end of the work piece by the pushing member of the moving means. Further, the conveyance of the work piece from the machine tool to the jig chuck after the completion of processing by the conveyance means and the work of removing the jig from the work piece are performed by the inner diameter gripping means of the conveyance means.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall view of one embodiment of a work supply apparatus of the present invention. Reference numeral 1 is a grinder, 2 is a setup device for inserting and removing a jig 52 made of an elastic material into a hollow hollow cylindrical work W. Reference numeral 3 is a transfer loader for transferring the workpiece. Grinder 1
Is composed of a bed 1a, a work table 1b, a headstock 1c, a tailstock 1d, and a grindstone base 1e. The work table 1b is moved to the left and right by a table feed motor 1g, The main shaft of the table 1c is rotationally driven by the main shaft drive motor 1f. The setup device 2 includes a work cradle 2a in which a work W is supplied from another work supply conveyor and stands by for setup, a jig chuck 2b made of an elastic material 54 for inserting a jig 52, and a work. The work W is configured to include a carry-out pallet 2c for storing and carrying out the work after completion of processing. The carrier loader 3 is provided with a support column 3a standing upright at the rear of the grinder 1 and x-axis direction guide rails 3b, x fixed horizontally on the support column 3a.
Along the y-axis direction (front-back direction in the drawing) guide rail 3e that can be moved on the axial guide rail 3b by the x-axis rack 3c, and along the Z-axis guide rail 3g that can move up and down. It is composed of a transport hand support body 3h supporting a vertically movable transport hand 3n at its lower end. 3d is an x-axis moving motor, 3f is a y-axis moving motor, and 3j is a z-axis moving motor.
3k is a rack for Z-axis movement and a pinion 3m
Is engaged with.

Next, individual structures will be sequentially described.
First, the transfer loader 3 supports the transfer hand 3n for inserting and removing the jig 52 made of the elastic material 54 into the work, supplying the work to the grinder 1, and removing the work. The hand support 3h is supported so as to be movable in three axial directions of the X axis, the Y axis, and the Z axis.

As shown in FIG. 2, the transport hand 3n has a U-axis centered on an angle member 31 fixed to a lower end of a transport hand support 3h movable by a Z-axis rack 3k in the Z-axis direction (vertical direction). A support plate 33 supported so as to be freely rotatable.
The cylinder 32 is configured to be pivotable between a horizontal position and a vertical position. A chuck support plate 38 is provided on the support plate 33 so as to be rotatable about the V-axis, and an end on the chuck support plate 38 is used to carry out a work-in chuck 36 for carrying a workpiece into the grinder 1. The carrying-out chucks 35 are supported, both chucks are arranged at an angle of about 150 degrees, and are configured to be alternately moved to the lower end, which is the working position, by the chuck turning cylinder 34. The carry-in chuck 36 is a two-jaw chuck that grasps the outer periphery of the work piece, and is opened and closed by a claw opening / closing cylinder 37. The carry-out chuck 35 has three inner diameters gripped from the inside of the end of the work piece. The gripping claw is configured to be opened and closed by an open / close cylinder (not shown).

The setup device 2 is shown in FIGS. On the support base 40 for the setup device 2, an inclined base 41 as a conveyor for supplying the workpiece W is arranged on the upper part thereof,
A workpiece receiving table 2a is provided at the front end of the work table 2a.
The workpieces W are individually supplied to the workpiece cradle 2a. The workpiece support 2a is the support 40
It is provided so as to be movable left and right on a guide rail 44 which is provided so as to be movable up and down by a lifting cylinder 42 fixed to the slide cylinder 45.
Work piece receiving members (V-shaped blocks) 46 are installed at intervals on the work piece holder 2a, and a pushing member 48 for pushing the work piece W is pivotally supported by a pin 49 on a column 47 at the left end.

A jig chuck mounting frame 50 is fixed to the right end of the support base 40 for the setup device 2, and the jig chuck 2b is mounted at a position opposite to the upper limit position of the workpiece pushing member 48. Has been. Above the setup device 2, the transfer hand 3n of the transfer loader 3 is provided.
Are arranged so as to correspond to each other, and the jig 52 is inserted into the work W by the transfer hand 3n, the work is supplied to and removed from the grinder, and the work 52 is extracted from the jig 52, and the transfer pallet 2c. Up to delivery. A transfer pallet 2c is arranged in the front part of the setup device 2, and the processed workpiece is vertically turned by the rotation of the support plate 33 of the transfer hand and is vertically moved into the transfer pallet 2c. Paid.

As shown in FIG. 4, the jig 52 comprises a core material 53 formed of a rigid body and an elastic material 54 such as rubber fixed around the core material 53. The gripping portion 53a is formed by slightly projecting the core material so that the right end portion of the material 53 can be gripped.

FIG. 5 shows a support drive device for the workpiece W of the grinding machine 1. A main shaft 61 is rotatably supported by a static pressure bearing on the headstock 1c, and a known inner diameter chuck 62 is supported at the tip of the main shaft 61. The chuck body has a tapered tip, and three inner diameter gripping claws are housed in grooves at three circumferential positions, so that the chuck driving actuating rod 63 can open and close the inner circumference of the workpiece W. It is configured. A hole is opened in the center of the chuck body, and the jig 5
The grip portion 53a of the core member 53 protruding to the right end portion of 2 is accommodated. A ram 64 having a center 65 having a stepped taper portion at its tip is rotatably and retractably supported on the tailstock 1d, and a ram advance / retreat cylinder 6 provided in the tailstock.
It is configured to be able to move forward and backward by 6. At the center of the grinder, there is provided an upper V-shaped workpiece temporary support table 67 so that the workpiece W can be temporarily received.

Next, the operation of one embodiment of the workpiece supply apparatus of the present invention will be described in sequence. As shown in FIG. 6, the workpiece W supplied from the tilt table 41 of FIG.
It is once received by the workpiece receiving member 46 of a. On the other hand, the jig 52 is held by the jig chuck 2b by a holding portion 53a formed at one end of the core material 53. Next, as shown in FIG. 7, the workpiece support table 2a is raised by the raising cylinder 42 so that the center of the workpiece W is located at the jig chuck 2.
It should be aligned with the center of the jig 52 held by b.

Next, the work receiving base 2a is slid rightward by operating the slide cylinder 45, and the work on the work receiving base 2a is inserted into the jig 52. At that time, the left end of the work W is the support column 4 at the left end of the work cradle 2a.
The jig 52 is pushed by the pushing member 48 pivotally supported on the workpiece 7, and the jig 52 is inserted into the workpiece up to a predetermined position (FIG. 8). Next, the transfer hand 3n is moved to operate the loading chuck 36 to grip the outer periphery of the workpiece W, and the jig chuck 2b
Clamping the grip portion 53a of the core material 53 is released, and the loading chuck 36 is slid slightly to the left to pull the grip portion 53a of the jig 52 out of the jig chuck 2b, then lifted, and conveyed to the grinder 1. (FIGS. 9 and 10).

The workpiece W is temporarily supported by the workpiece temporary support 67 of the grinding machine 1.
After placing on top, the loading chuck 36 releases the workpiece,
The transport hand 3n waits at the upper position until the processing is completed. The work W placed on the temporary work support 67 is pushed by the stepped taper center 65 when the ram 64 of the tailstock moves to the right by the ram advancing / retreating cylinder 66, and the inner diameter of the spindle end. It is inserted into the chuck 62. The right end of the workpiece W is gripped on the inner circumference by the inner diameter gripping claw of the inner diameter chuck 62, and the left end is engaged with the step portion of the stepped taper center 65 and supported on the spindle axis of the grinder 1 and then the workpiece. Is driven to rotate, and normal grinding is performed by the grindstone of the grindstone base 1e.

When the grinding process is completed, as shown in FIG. 11, the stepped taper center 65 of the tailstock 1d is retracted, the left end of the workpiece is released, and the transfer hand 3n waiting for the upper part is taken out. The chuck 35 grips the inner periphery from the left end of the workpiece, loosens the inner diameter chuck 62 of the spindle spindle, moves the conveying hand 3n to the left a little, and removes the gripping portion 53a of the core material of the jig 52 from the inner diameter chuck 62. After that, the workpiece is transported.

The processed work is conveyed again to the jig chuck 2b, the gripping portion 53a of the core material 53 of the jig 52 is gripped by the jig chuck 2b, and then the conveying hand 3n is moved to the left. To remove the hollow cylindrical workpiece W from the jig (FIG. 12). Then, the cylinder 32 of the transfer hand 3n is operated to rotate the support plate 33 to make the workpiece vertical, and the transfer hand 3n is lowered to vertically store the processed workpiece in the unloading pallet 2c (see FIG. 3). ) 1
The cycle ends. In the next cycle, since the jig 52 is held by the jig chuck 2b as it is, it suffices to raise and push in the workpiece on the workpiece holder 2a.

The embodiment of the present invention applied to a grinding machine has been described above, but it is obvious that the invention can be applied to other machine tools such as a lathe. In addition, when the jig is inserted into or removed from the workpiece, the workpiece and the jig may be relatively moved on the same axis line, and the jig chuck may be moved. Therefore, the present invention can be implemented in various other forms without departing from the scope of the claims.

[0022]

The present invention has the following effects. In the processing of a hollow cylindrical workpiece, the attachment / detachment work of the vibration absorbing jig can be automated as a part of the normal work supply / removal work.

Further, since a jig is inserted and withdrawn each time by performing a series of work supply and removal operations, only one jig is sufficient and it is economical, and at the same time, those stocks are not used. Space is not required, and space can be saved. Further, when inserting the workpiece into the jig, the end portion of the workpiece is pushed by the pushing member to be inserted, so that the workpiece can be smoothly inserted without exerting any force in the radial direction. Can be protected from deformation. Furthermore, by using the inner diameter chuck as the chuck for carrying out the processed workpiece, it is not necessary to grip the outer peripheral surface after processing, and it is possible to prevent the processing surface from being scratched. It plays.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is a detailed view of the transport hand according to the embodiment of the present invention.

FIG. 3 is a side view of a setup device and a transport hand according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a setup device and a transport hand according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a state in which a workpiece according to an embodiment of the present invention is attached to a machine tool.

FIG. 6 is a partial view showing an operating state of the embodiment of the present invention.

FIG. 7 is a partial view showing an operating state of the embodiment of the present invention.

FIG. 8 is a partial view showing an operating state of the embodiment of the present invention.

FIG. 9 is a partial view showing an operating state of the embodiment of the present invention.

FIG. 10 is a partial view showing an operating state of the embodiment of the present invention.

FIG. 11 is a partial view showing an operating state of the embodiment of the present invention.

FIG. 12 is a partial view showing an operating state of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grinding machine 1e Grinding stone stand 2 Setup device 2a Workpiece receiving stand 2b Jig chuck 2c Carry-out pallet 3 Conveyor loader 3n Carrying hand 35 Carry-out chuck 36 Carry-in chuck 48 Push-in member 52 Jig made of elastic material 53a Jig Gripping part 62 Inner diameter chuck 64 Tail ram 65 Stepped taper center W Workpiece

Claims (3)

[Claims] 1. A core member made of an elastic material, the core member being inserted into the central portion,
A jig having a core material gripping portion formed at one end, a jig chuck for gripping the jig gripping portion, a jig gripped by the jig chuck and a workpiece are arranged on the same axis, and A moving unit that relatively moves the workpiece and the jig in the axial direction to insert the jig into the workpiece, and a conveying unit that conveys the workpiece into which the jig is inserted between the machine tool and the jig chuck. And a work supply device. 2. The workpiece supply device according to claim 1, wherein the moving means has a pushing member for pushing one end of the workpiece to move the workpiece. 3. The work supply apparatus according to claim 1, wherein the transfer means has an inner diameter holding means for transferring a work from a machine tool to the jig chuck.