JPH09290371A - Processed article clamp device for shot blast equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clamp a processed article in various sizes without replacing a clamp member, by forming a space clamping the processed article formed by an outer side clamp member shorter than formed by an inner side clamp member and a height of the outer side clamp member higher than the inner side clamp member. SOLUTION: A processed article W is positioned in a prescribed position on a roller conveyer, next, the processed article W is transfer fed to a position almost just before in almost the center part of clamp members 30, 31 in a processed article clamp device 4. Next, the processed article W is mounted on a processed article mounting part and carried in to almost a center position of the clamp member 30, 31. Successively, the clamp member 30, 31 and an upper/lower clamp member 29 are made mutually adjacent, the processed article W is clamped by the upper/lower three or more clamp members 29. Here, the processed article W, by the outer side clamp member 29 in the case of large size, by the inner side clamp member 29 in the case of small size, is clamped respectively by point contact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a workpiece clamping device in a shot brass machine for blasting a workpiece such as a cylinder block of an automobile engine.

[0002]

2. Description of the Related Art The applicant has previously proposed, as a workpiece clamping device of this type, a rotary member rotatably arranged in a vertical plane, and two rotary shafts attached to the rotary member. And a pair of rotatable arms which are mounted in a cantilevered state and are opposed to each other at a required interval, a pair of clamping members which are mounted on the tips of the arms and clamp the article to be processed, and the pair of clamping members. A plurality of strip-shaped clamp members that are mounted on the members substantially orthogonally to each other and that can hold the article to be processed at three or more places, and a pair of which one ends are fixed to the two support shafts, respectively. A link, a connecting rod whose one end is pin-connected to the other ends of the pair of links, an actuator mounted on the rotating body to reciprocate the connecting rod in the longitudinal direction,
Has been developed and applied for a patent. However, in the conventional workpiece clamping device configured in this way,
Although the object to be processed is clamped at three or more points, the size of the object to be processed is changed because it is necessary to clamp the object to be processed as few as possible in order to reduce the contact area between the clamp member and the object to be processed. Then, the clamp member has to be replaced, and there is a problem such as lack of versatility. The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a clamp device capable of clamping various sizes of objects to be processed without exchanging a clamp member for clamping the objects to be processed.

[0003]

In order to achieve the above object, the present invention provides a rotating body rotatably arranged in a vertical plane, and a cantilever on the rotating body via two supporting shafts. A pair of rotatable arms that are mounted opposite each other in a state and at a required interval, a pair of clamping members that are mounted on the tips of the pair of arms to clamp the article to be processed, and a pair of these clamping members. A plurality of clamp members that are mounted substantially orthogonal to these and that are capable of clamping the article to be processed at three or more locations, and a pair of clamp members each having one end fixed to the two support shafts. A link, a linking rod whose one end is pinned to the other ends of the pair of links, and an actuator mounted on the rotating body to reciprocate the linking rod in the longitudinal direction are provided to rotate the workpiece. Shot blasting while blasting In the equipment clamping device for equipment, the intervals formed by the plurality of clamping members for clamping the materials to be processed are shorter than those formed by the clamping members located on the outer side than those formed by the inner clamping members. Thus, the height of the outer clamp member is made higher than that of the inner clamp member. Therefore, by loading the object to be processed to a substantially central position of the gripping member, a large object to be processed is clamped by a high-height clamp member, and a small object to be processed is clamped by a low-height clamp member. .

[0004]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described in detail based on FIG. As shown in FIG. 2, which is a front view, the shot blasting equipment to which the present invention is applied includes a carrier device 1 for carrying a workpiece W by a predetermined distance, and the carrier device 1.
A positioning device 2 which is disposed at the upper left position of the device and positions the article to be processed W carried on the transfer device 1 at a predetermined position on the transfer device 1; It is composed of a cabinet 3 that constitutes a chamber, and a workpiece clamping device 4 that is mounted on the cabinet 3 to clamp the workpiece W and rotate the workpiece W in a vertical plane.

In the transfer device 1, a roller conveyor 5 having a plurality of rollers 5a at the left half position and extending in the left-right direction can reciprocate in the left-right direction via a support frame 6 extending in the left-right direction. On the lower surface of the right end of the roller conveyor 5, a tip end of a piston rod of a horizontally oriented cylinder 7 which is pivotally supported and separately fixed is connected via a connecting member 8. The conveyor 5 is adapted to reciprocate a required distance in the left-right direction by the expansion and contraction operation of the cylinder 7.

Further, in the positioning device 2, an elevating frame 9 is provided so as to be able to ascend and descend via a downwardly facing cylinder 10, and the elevating frame 9 has two L-shaped left-hand parts.
The right arms 11 and 12 are mounted in the left-right direction so as to face each other at a required interval, and the left arm 11 has its upper end portion rotated, and the right arm 12 rotates in the left-right direction at the same level as the left arm 11. The right arm 12 is movably supported, and at the upper end of the right arm 12, a tip end of a piston rod of a laterally-oriented cylinder 13 pivotally supported by the elevating frame 9 is pin-connected, so that the left arm 11 is pivotally supported. And a position above the pivotal position in the right arm 12 are connected via a connecting rod 15, and the left and right arms 11 and 12 are extended and contracted by the cylinder 13 at substantially the same angular velocity. By rotating up and down, the lower end portions are opened and closed with respect to each other.

Further, as shown in FIGS. 3 and 4, on the outer surface of the cabinet 3, a shot projecting device 36 for projecting a shot toward a workpiece W rotated by the workpiece clamping device 4. Is attached.

Further, as shown in FIG. 1, the workpiece clamping device 4 has a bearing 18 mounted on a support member 17 fixed to a support base 16 mounted on the left outer surface of the cabinet 3.
A cylindrical rotary body 20 rotatably provided in a vertical plane through which a chain wheel 19 is mounted on the right end surface, a motor 22 with a speed reducer 21 installed on the support member 17, and a motor 22. A chain wheel 24 that is fitted to the output shaft of the rotary wheel 20 and is connected to the chain wheel 19 via an endless roller chain 23; and a cylindrical connecting member 25 that is concentrically mounted on the right outer surface of the rotating body 20. A rotary member 26 mounted on the right end of the connecting member 25 and rotatable in a vertical plane, and mounted on the rotary member 26 via two supporting shafts 27 in a cantilevered state and rotatable. Pair of arms 2 extending to the right
8, a pair of holding members 30 and 31 attached to the tips of the pair of arms 28 for holding the article to be processed, and the pair of holding members 30 and 31 attached to the pair of holding members 30 and 31 substantially orthogonal to them. Around a plurality of clamp members 29 in the form of a strip plate capable of clamping an article at three or more places, one end of which is a lower holding member 31 and the other end of which is a holding member 31 pivotally supported by the rotating body 20. A stop member 32, a pair of links 33 each having one end fixed to the three support shafts 27, a cylinder 34 attached to the rotating body 26,
A connecting rod 35, one end of which is pin-connected to the link 33 and the other end of which is connected to the tip of the piston rod of the cylinder 34.
The holding members 30 and 31 are opened and closed via the arm 33 by the contraction operation of the cylinder 34. Then, the plurality of clamp members 2
The height of the outer clamp member 29 is such that the interval formed by 9 for clamping the workpiece is shorter than that formed by the outer clamp member 29 than that formed by the inner clamp member 29. Is higher than that of the inner clamp member 29, and the clamp member 29 is
The contact surface with the article to be processed W has a circular arc shape.
In this case, when the contact surface of the clamp member 29 with the object to be processed has an arc shape, particularly when the contact surface of the object to be processed with the clamp member 29 has a flat shape.
By clamping the workpiece W at the corners, the contact area with the clamp member 29 can be reduced. Also, the contact area with the clamp member 29 can be reduced by forming the clamp member 29 so that its cross section is tapered.

Next, the operation of the shot blasting equipment thus constructed will be described. As shown in FIG.
In advance, the cylinder 10 of the positioning device 2 is contracted to raise the left and right claws 11, 12 and the like, and the cylinder 13 of the positioning device 2 is contracted to open the lower ends of the left and right claws 11 and 12 to each other. , The cylinder 7 of the transfer device 1 is contracted to move the left half of the roller conveyor 5 to a position directly below the positioning device 2, and the cylinder 34 of the workpiece clamping device 4 is extended to operate the gripping members 30, 31 and. The upper and lower clamp members 29 are spaced apart. Under this state, the workpiece W to be shot blasted is carried into an appropriate position on the roller 5a of the roller conveyor 5 by an appropriate conventional means (not shown), and then the cylinder 10
Is extended to lower the left and right claws 11, 12 and the like, and the article to be processed W on the roller conveyor 5 is positioned between the left and right claws 11, 12. Next, when the cylinder 13 is extended and the lower end portions of the left and right claws 11 and 12 are brought close to each other,
The workpiece W is pushed by the lower ends of the left and right claws 11 and 12 to be moved left and right, and is moved to a substantially central position of the positioning device 2. That is, the processed product W is positioned at a predetermined position on the roller conveyor 5.

Next, the cylinder 13 is contracted to move to the left
The right claws 11 and 12 are opened, and then the cylinder 10 is contracted to raise the left and right claws 11 and 12 and the like. Next, when the cylinder 7 is extended and the roller conveyor 5 and the like are moved to the right, the object to be processed W is transferred to a position just before the center of the gripping members 30 and 31 of the object to be processed clamping device 4. Will be done. Then, at a position directly below the article to be processed W,
The fork-shaped article placing member of the article carrying device (not shown) is inserted, and then the article placing member is raised to place the article W on the article placing member. Then, the processed product W is carried in to the substantially central position of the gripping members 30, 31 by the processed product placing member, and subsequently, the cylinder 34 is contracted to operate the gripping members 30, 31 and the upper and lower parts.
The lower clamp members 29 are brought close to each other, and the workpiece W is clamped by three or more upper and lower clamp members 29. In this case, the workpiece W is the outer clamp member 29 when it is large, and the inner clamp member 2 when it is small.
At 9 each is clamped by point contact. As a result, the article to be processed W is clamped at as few places as possible.

Thereafter, the shot projection device 36 is driven to project a shot toward the article W to be processed, while the motor 2
2 is driven to rotate the article to be processed W in a vertical plane to blast the surface thereof. At this time, since the contact area between the clamp member 29 and the workpiece W is small, the blast treatment is effectively performed. After blasting the workpiece W in this manner, the workpiece clamping device 4 is reversely operated to release the clamped state of the workpiece W, and then the workpiece W is transferred from the cabinet 3 to the roller. It is carried out on the conveyor 5 to complete one cycle.

[0012]

As is apparent from the above description, the present invention requires a rotating body rotatably arranged in a vertical plane and a cantilever state via the two supporting shafts on the rotating body. A pair of rotatable arms that are mounted opposite to each other at an interval of, a pair of clamping members that are mounted on the tips of the pair of arms and clamp the article to be processed, and these pair of clamping members have substantially the same configuration. A plurality of strip-shaped clamp members that are mounted orthogonally and that can clamp the article to be processed at three or more locations, and a pair of links whose one ends are fixed to the two support shafts, respectively. The other end of the pair of links is provided with a connecting rod whose one end is connected to a pin, and an actuator mounted on the rotating body to reciprocate the connecting rod in the longitudinal direction, for blasting while rotating the workpiece. Shot blast equipment In the product clamping device, the interval for clamping the object to be processed formed by the plurality of clamp members is set so that the one formed by the outer clamp member is shorter than the one formed by the inner clamp member. Since the height of the clamp member is made higher than that of the inner clamp member, it is possible to perform shot blasting by clamping the object to be processed at three or more places with a small contact area without replacing the clamp member. It has excellent effects such as being able to.

[Brief description of drawings]

FIG. 1 is a partially sectional front view showing an embodiment of the present invention.

FIG. 2 is a schematic front view of the shot blasting equipment to which the present invention is applied with a partially cutaway section.

FIG. 3 is a schematic plan view of the main part of FIG. 2 with a partial cross-section, showing the object to be processed transferred to a position directly in front of the substantially central position of the holding member.

FIG. 4 is a right side view of FIG.

[Explanation of symbols]

 20 Rotating Body 27 Support Shaft 28 Arm 29 Clamping Member 30, 31 Clamping Member 33 Link 34 Cylinder 35 Connecting Rod

Claims (2)

[Claims] 1. A rotary body 20 rotatably arranged in a vertical plane, and is mounted on the rotary body 20 in a cantilever state with two supporting shafts 27 in a cantilevered manner and facing each other with a required space. And a pair of rotatable arms 28 and the pair of arms 28
A pair of holding members 30 and 31 mounted on the tip of the workpiece for holding the article to be processed, and the pair of holding members 30 and 31 attached to the pair of holding members 30 and 31 substantially at right angles to the article to be processed at three or more places. A plurality of clamp members 29 in the form of a clampable strip plate, a pair of links 33 each having one end fixed to the two support shafts 27, and one end of which is pin-connected to the other ends of the pair of links 33. A workpiece clamping device for a shot blasting equipment, which includes a connecting rod 35 and an actuator 34 mounted on the rotating body 20 and reciprocatingly moving the connecting rod 35 in the longitudinal direction, for performing a blast treatment while rotating the workpiece. In the plurality of clamp members 29
The clamping interval of the object to be processed formed by is such that the one formed by the clamp member 29 located outside is shorter than the one formed by the clamp member 29 located inside.
The height of the outer clamp member 29 is set to the inner clamp member 2
The workpiece clamping device for the shot blasting equipment, which is higher than that of 9. 2. A rotating body 20 rotatably arranged in a vertical plane, and is mounted on the rotating body 20 so as to be cantilevered with two supporting shafts 27 in a cantilever state with a predetermined gap therebetween. And a pair of rotatable arms 28 and the pair of arms 28
A pair of holding members 30 and 31 attached to the tips of the workpieces for holding the article to be processed, and a strip plate shape which is attached to the pair of holding members 30 and 31 substantially orthogonally to them to clamp the article to be processed. A plurality of clamp members 29, a pair of links 33 having one ends fixed to the two support shafts 27, a connecting rod 35 having one ends pin-connected to the other ends of the pair of links 33, and An actuator 3 mounted on the rotating body 20 to reciprocate the connecting rod 35 in the longitudinal direction.
In the workpiece clamping device of the shot blasting equipment for blasting the workpiece while rotating the workpiece, the contact surface of the clamp member 29 with the workpiece has an arc shape. A workpiece clamping device for shot blasting equipment.