JP2009023075A - Work gripping device and machining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work gripping device for shortening a time required for machining by actualizing the carrying operation of a workpiece into/out of a machining position at a higher speed, and also to provide a machining device in which the work gripping device is installed. <P>SOLUTION: The work gripping device comprises a work gripping means having an openable/closable work gripping pawl portion for gripping the work, and a driving means selectively connected to the work gripping means for driving the work gripping pawl portion to be opened/closed. This actualizes the carrying operation of the workpiece in/out at a higher speed to greatly reduce a time required for machining. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention, for example, burrs against industrial parts such as gears (hereinafter referred to as workpieces) manufactured by methods such as cutting with a machine tool, die casting, injection molding, press punching, lost wax casting, die forging, and the like. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a workpiece gripping device incorporated in a processing device that performs chamfering or chamfering processing, and a processing device incorporating the workpiece gripping device, and in particular, speeds up work loading / unloading operations to shorten the time required for processing It relates to things devised to be able to.

Workpieces produced by cutting with machine tools, die casting, injection molding, press punching, lost wax casting, die forging, etc. have an extra part called “burr” on the outer periphery. After the manufacture, for example, the deburring process is executed using a flexible tool such as a brushing wheel or a wire wheel to finish the product.
Also, when it is necessary to chamfer the workpiece surface according to the contour shape of the workpiece, or to finish the workpiece end surface with a certain machining surface accuracy, the end mill, rotary bar, chamfer cutter, etc. The chamfering and finishing are performed using a cutting tool.

However, all of the conventional devices of this type move the cutting tool along the trajectory information set in advance based on the model workpiece and the like, and uniform cutting is performed for all workpieces. It was the composition which gives.
Further, when setting the trajectory information, it is necessary to set a large number of programming points along the contour shape of the model work and obtain the coordinate values thereof, which requires a lot of labor and a long working time. .
Therefore, the applicant of the present patent application has proposed “following machining apparatus” disclosed in the following Patent Document 1 and “processing apparatus” disclosed in the following Patent Document 2, and has filed applications. In addition, machining that is not affected by variations in the contour shape of the workpiece, does not require complicated trajectory information input and storage operations, is inexpensive, and can perform desired machining without requiring complex control. The device has been successfully developed.

Japanese Patent Laid-Open No. 5-200655

JP 11-197930 A

  However, according to the configuration of the conventional processing apparatus, the following problems have occurred. That is, at the time of machining, the workpiece to be machined must be loaded and set at a predetermined past position, and after machining has been completed, it must be carried out. However, there is a problem that this work is troublesome and takes a long time, resulting in a long time for processing.

  The present invention has been made based on such points, and the object of the present invention is to provide a workpiece gripping device capable of shortening the time required for machining by speeding up the loading / unloading of the workpiece to / from the machining position, and its An object of the present invention is to provide a machining apparatus incorporating such a workpiece gripping apparatus.

In order to achieve the above object, a workpiece gripping apparatus according to claim 1 of the present invention comprises a workpiece gripping means having a workpiece gripping claw portion for gripping a workpiece so as to be openable and closable, and selectively connected to the workpiece gripping means. Drive means for opening and closing the workpiece gripping claw portion.
The workpiece gripping device according to claim 2 is the workpiece gripping device according to claim 1, wherein the workpiece gripping means includes a rotary screw shaft, and the rotary screw shaft is rotated in an appropriate direction to hold the workpiece. The nail part is opened and closed.
According to a third aspect of the present invention, there is provided the work gripping apparatus according to the second aspect, wherein the driving means is composed of a rotation drive motor and a coupling portion connected to the rotation drive motor and freely opened and closed. And connected to the rotary screw shaft of the workpiece gripping means via the coupling portion, and rotating the rotary drive motor to rotate the rotary screw shaft to open and close the workpiece gripping claw portion. It is characterized by.
According to a fourth aspect of the present invention, there is provided the work gripping apparatus according to the third aspect, wherein the driving means is configured to be movable back and forth with respect to the work gripping means.
A processing device according to claim 5 is a base, a work gripping device according to any one of claims 1 to 4 attached to the base, and a work gripping device attached to the base. And a processing means for processing the gripped workpiece.
According to a sixth aspect of the present invention, there is provided the machining apparatus according to the fifth aspect, wherein the machining means includes a movable base installed so as to be movable forward and backward in the direction of the workpiece gripping apparatus, and a movable base driving means for moving the movable base forward and backward. And a processing unit attached to the tip of the movable table via elastic means.
According to a seventh aspect of the present invention, there is provided a machining apparatus according to the sixth aspect, wherein the machining unit includes a machining tool and a copying mechanism that follows the outer shape of the workpiece held by the workpiece holding device. It is characterized by this.
A machining apparatus according to an eighth aspect is the machining apparatus according to the seventh aspect, wherein the machining apparatus is a chamfering device.

As described in detail above, the workpiece gripping device according to claim 1 of the present invention is selectively connected to the workpiece gripping means and the workpiece gripping means provided with a workpiece gripping claw portion for gripping the workpiece. Since it has a drive mechanism that opens and closes the workpiece gripping claw, the workpiece loading and unloading operations are speeded up, thereby significantly reducing the processing time. Can be made. This is particularly remarkable when machining a large number of workpieces.
In addition, the structure for gripping the workpiece is relatively simple, and a desired effect can be achieved without complicating and increasing the size of the apparatus.
The workpiece gripping device according to claim 2 is the workpiece gripping device according to claim 1, wherein the workpiece gripping means includes a rotary screw shaft, and the rotary screw shaft is rotated in an appropriate direction to hold the workpiece. Since it is comprised as what opens and closes a nail | claw part, a desired effect can be show | played with a comparatively simple structure.
According to a third aspect of the present invention, there is provided the work gripping apparatus according to the second aspect, wherein the driving means is composed of a rotation drive motor and a coupling portion connected to the rotation drive motor and freely opened and closed. And connected to the rotary screw shaft of the workpiece gripping means via the coupling portion, and configured to open and close the workpiece gripping claw portion by rotating the rotary screw shaft by rotating the rotary drive motor. Therefore, a desired effect can be obtained with a relatively simple configuration.
According to a fourth aspect of the present invention, there is provided a workpiece gripping apparatus according to the third aspect, wherein the drive means is configured to be movable forward and backward with respect to the workpiece gripping means. The effect of can be produced.
A processing device according to claim 5 is a base, a work gripping device according to any one of claims 1 to 4 attached to the base, and a work gripping device attached to the base. Since it has a configuration that includes a processing means for processing the gripped work, first, the work loading / unloading operation is speeded up, thereby greatly increasing the time required for processing. Can be shortened. This is particularly remarkable when machining a large number of workpieces. In addition, the structure for gripping the workpiece is relatively simple, and a desired effect can be achieved without complicating and increasing the size of the apparatus.
According to a sixth aspect of the present invention, there is provided the machining apparatus according to the fifth aspect, wherein the machining means includes a movable base installed so as to be movable forward and backward in the direction of the workpiece gripping apparatus, and a movable base driving means for moving the movable base forward and backward. And a processing unit attached to the tip of the moving table via elastic means, a desired effect can be obtained with a relatively simple configuration.
According to a seventh aspect of the present invention, there is provided a machining apparatus according to the sixth aspect, wherein the machining unit includes a machining tool and a copying mechanism that follows the outer shape of the workpiece held by the workpiece holding device. In this case, a desired effect can be obtained in an apparatus that performs processing while copying the outer shape of the workpiece.
Further, the machining apparatus according to claim 8 assumes a chamfering apparatus in the machining apparatus according to claim 7, and can provide a desired effect in such a chamfering apparatus.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing the overall configuration of the machining apparatus according to the present embodiment, and FIG. 2 is a side view of the same. First, there is a base 1, and a workpiece gripping device 3 is installed on the base 1. A processing means 5 is installed on the base 1. An operation panel 7 is installed on the base 1. The workpiece 9 is gripped by the workpiece gripping device, and predetermined processing is performed on the workpiece 9 by the processing means 5.

Details will be sequentially described below. First, the configuration of the processing means 5 will be described. As shown in an enlarged view in FIG. 3, first, there is a drive motor 11, and a screw 13 is connected to a rotation shaft of the drive motor 11. A nut 15 is screwed and arranged on the screw 13, and a moving base 17 is fixed to the nut 15. A head portion 19 is attached to the tip of the movable table 17. The head unit 19 is provided with a plurality of processing units 21 via two (two in this embodiment) coil springs 23 as elastic means. Further, an origin sensor 24, a forward end sensor 26, and a rear end side stopper 28 are provided on the base 1 side and in the vicinity of the moving base 17.

The processing unit 21 has the following configuration. First, a machining tool unit 25 is attached, and this machining tool unit 25 includes a machining tool 27 at the tip. A copying apparatus 29 is attached. The copying apparatus 29 includes a copying stylus 31, and the copying stylus 31 is brought into contact with the outer shape of the rotating work 9 to copy the outer shape of the work 9. That is, the copying stylus 31 is brought into contact with the outer shape of the rotating workpiece 9. Due to the change in the outer shape of the work 9, the entire processing unit 21 advances or retreats against or against the spring force of the coil spring 23, thereby imitating the outer shape of the work 9. At the same time, a certain amount of chamfering is performed on the edge of the work 9 by the processing tool 27.

Next, the configuration of the workpiece gripping device 3 will be described. As shown in an enlarged view in FIG. 4, first, there is a table 31, and this table 31 is configured to be rotationally driven by a rotational drive motor 33 (shown in FIG. 2). A screw shaft 35 is supported on the table 31 by a pair of bearing members 37 and 39 so as to be rotatable. The screw shaft 35 is a reverse screw on both the left and right sides in FIG.

A pair of nuts 41 and 43 are screwed and arranged on the screw shaft 35. A pair of gripping claw members 45 and 47 are attached to the nut 41. Similarly, a pair of gripping claw members 49 and 51 are also attached to the nut 43. Then, by rotating the screw shaft 35 in an appropriate direction, the pair of nuts 41 and 43 are separated from each other. When the pair of nuts 41 and 43 are separated from each other, the gripping claw members 45 and 47 and the gripping claw members 49 and 51 are separated from each other, whereby the workpiece 9 is gripped or released. A gripped member 53 is attached to one end of the screw shaft 35.

On the other hand, driving means 61 for rotating and driving the screw shaft 35 in an appropriate direction is provided. Hereinafter, the configuration of the driving means 61 will be described. As shown in an enlarged view in FIG. 4, first, a support base 63 is installed, and a movable base 65 is installed on the support base 63 so as to be movable in the left-right direction in FIG. 4. That is, a pair of guide rails 67 and 67 are laid on the support base 63. On the other hand, two guide members 69, 69 are installed on the lower surface side of the moving table 65. The guide members 69 and 69 are engaged with the pair of guide rails 67 and 67 in a movable state.

A cylinder mechanism 71 is installed between the support base 63 and the moving base 65. The cylinder mechanism 71 includes a cylinder 73 installed on a support base 63 and a piston rod 75 attached to the cylinder 73 so as to be able to protrude and retract. The tip of the cylinder rod 75 is connected to the moving table 65. Therefore, when the cylinder mechanism 71 operates, the moving table 65 moves in the left-right direction in FIG. 4 via the piston rod 75.

A screw shaft gripping / rotation drive unit 81 is attached to the moving table 65. First, there is a drive motor 83, and a drive shaft 85 is connected to a rotation shaft of the drive motor 83. A gripping portion 87 is attached to the tip of the drive shaft 85. The gripping part 87 includes two gripping members 89 and 89. The gripping member 53 on the screw shaft 35 side is gripped by these two gripping members 89 and 89. That is, the grip 87 is provided with an air supply port 90 and an air discharge port 92. By supplying the working air through the air supply port 90, the gripping members 89 and 89 are closed to grip the gripped member 53. On the contrary, by discharging the working air through the air discharge port 92, the gripping members 89 and 89 are opened, and the gripping of the gripped member 53 is released.

The operation will be described based on the above configuration.
First, for gripping the workpiece 9, the workpiece 9 is carried between the workpiece gripping claw members 45, 47, 49, 51 of the workpiece gripping device 3 by a workpiece loading / unloading robot (not shown). Next, the cylinder mechanism 71 is activated to advance the moving table 65 toward the gripped member 53 side on the screw shaft 35 side. Thereby, the gripped member 53 is inserted between the two gripping members 89 and 89. Next, the gripping members 89 and 89 are closed by supplying the working air through the air supply port 90 to grip the gripped member 53. In this state, the drive motor 83 is rotated. As a result, the screw shaft 35 rotates in one direction so that the pair of nuts 41 and 43 approach each other, whereby the workpiece gripping claw members 45, 47, 49 and 51 approach and grip the workpiece 9.
Torque is generated by gripping the workpiece 9 by the workpiece gripping claw members 45, 47, 49, 51, and it is detected that the generated torque has reached a preset torque, and the drive motor 83 is rotated. It will stop.

Next, by discharging the working air through the air discharge port 92, the grip members 89 and 89 are opened, and the grip of the gripped member 53 is released. Next, the drive motor 83 is rotated so that the opened pair of gripping members 89 and 89 are positioned up and down as shown in FIG.
Next, the table 31 is rotated by the rotation drive motor 33. In this state, the head 19 of the machining apparatus 5 moves forward, so that the copying stylus 31 comes into contact with the outer shape of the workpiece 9. At this time, since the workpiece 9 rotates together with the table 31, the copying stylus 31 follows the outer shape of the workpiece 9. At the same time, a certain amount of chamfering is performed on the edge of the workpiece 9 by the processing tool 27.
At this time, since the pair of gripping members 89 and 89 are positioned up and down, the gripped member 53 passes between the pair of gripping members 89 and 89 even if the table 31 rotates. There is no interference with the holding members 89, 89.

Next, when the predetermined chamfering process is completed, the rotation of the table 31 is stopped. Next, the gripping members 89 and 89 are closed by supplying the working air through the air supply port 90 to grip the gripped member 53. In this state, the drive motor 83 is rotated in the reverse direction. As a result, the screw shaft 35 rotates in the other direction to separate the pair of nuts 41 and 43, thereby separating the workpiece gripping claw members 45, 47, 49, and 51 and releasing the gripping of the workpiece 9.

  Thereafter, the workpiece 9 released from gripping by a workpiece loading / unloading robot (not shown) is unloaded. Then, a new workpiece 9 is carried in. Hereinafter, the same operation is repeated.

As described above, according to the present embodiment, the following effects can be obtained.
First, the loading / unloading operation of the workpiece 9 is speeded up, whereby the time required for machining can be greatly shortened. This is particularly noticeable when chamfering is performed on a large number of workpieces 9.
Further, the structure for gripping the workpiece 9 is relatively simple, and a desired effect can be achieved without complicating and increasing the size of the apparatus.
Further, the diameter of the target workpiece 9 is not particularly limited, and can be similarly applied to workpieces 9 having various diameters.
Further, when processing is performed by rotating the table 31, the pair of gripping members 89 and 89 are controlled so as to be positioned up and down. Interference between the pair of gripping members 89 and 89 can be prevented. Further, since the backward operation is unnecessary, the operation can be simplified and the machining time can be shortened.

The present invention is not limited to the one embodiment.
In the above-described embodiment, the chamfering apparatus is described as an example, but the present invention can be similarly applied to apparatuses that perform other processing.

The present invention provides deburring for industrial parts such as gears (hereinafter referred to as workpieces) manufactured by methods such as cutting with a machine tool, die casting, injection molding, press punching, lost wax casting, die forging, etc. The present invention relates to a processing apparatus that performs chamfering processing, and more particularly to a device that has been devised so as to shorten the time required for processing by speeding up the work loading / unloading operation, for example, a gear having a complicated shape. This is suitable for chamfering.

It is a figure which shows one embodiment of this invention, and is a front view which shows the structure of the whole processing apparatus. It is a figure which shows one embodiment of this invention, and is a side view which shows the structure of the whole processing apparatus. It is a figure which shows one embodiment of this invention, and is a front view which shows the structure of the principal part of a processing apparatus. It is a figure which shows one embodiment of this invention, and is a side view which shows the structure of the principal part of a processing apparatus. It is a figure which shows one embodiment of this invention, and is a top view which shows the structure of the principal part of a processing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 3 Work gripping device 5 Processing means 7 Operation panel 9 Work 31 Table 35 Screw shaft 37 Bearing member 39 Bearing member 41 Nut 43 Nut 45 Holding claw member 47 Holding claw member 49 Holding claw member 51 Holding claw member 61 Driving means 63 Support stand 65 Moving stand 71 Cylinder mechanism 81 Screw shaft gripping / rotation drive unit

Claims (8)

A workpiece gripping means having a workpiece gripping claw for gripping a workpiece, which can be freely opened and closed;
Driving means selectively connected to the work gripping means for driving to open and close the work gripping claw portion;
A workpiece gripping device comprising: The workpiece gripping device according to claim 1,
The workpiece gripping device, wherein the workpiece gripping means includes a rotating screw shaft, and the workpiece gripping claw portion is opened and closed by rotating the rotating screw shaft in an appropriate direction. The workpiece gripping device according to claim 2,
The drive means is composed of a rotation drive motor and a coupling part that is connected to the rotation drive motor and can be freely opened and closed, and is connected to a rotation screw shaft of the work gripping means via the coupling part, A work gripping device for rotating and rotating the rotary screw shaft to open and close the work gripping claw portion. The workpiece gripping device according to claim 3,
The workpiece gripping device, wherein the driving means is configured to be movable back and forth with respect to the workpiece gripping means. The base,
The workpiece gripping device according to any one of claims 1 to 4, attached to the base,
Processing means for processing the workpiece attached to the base and gripped by the workpiece gripping device;
A processing apparatus comprising: The processing apparatus according to claim 5, wherein
The processing means includes a movable base installed so as to be movable forward and backward in the workpiece gripping device direction, a movable base driving means for moving the movable base forward and backward, and a processing unit attached to the tip of the movable base via an elastic means, The processing apparatus characterized by comprising. The processing apparatus according to claim 6, wherein
The processing apparatus includes a processing tool and a copying mechanism that follows an outer shape of a work gripped by the work gripping device. The processing apparatus according to claim 7, wherein
A processing apparatus characterized by being a chamfering apparatus.

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