JPH0544341U - Holding device for forging work - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] The present invention provides a structure in which a gripping rod can be accurately interlocked with a simple structure in a gripping device for gripping a forged work by a pair of swinging gripping rods. [Structure] A pair of gripping bars 20 and 21 are swingably provided,
Arc-shaped gears 24, 25 attached to the grip bars 20, 21
And the drive cylinder 17 is connected to one of the gripping rods 20 via a rod 18. When the rod 18 is moved back and forth by the drive cylinder 17, the gripping bars 20 and 21 are interlocked and rocked by the engagement of the gears 24 and 25.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a gripping device for a forging work.

[0002]

[Prior Art]

 After the forging work is heated in the heat treatment furnace, it is sent to the standby table in an aligned state, and each of the sent works is gripped by the handling device and conveyed to the press position of the forging machine. .. FIG. 12 shows a conventional work handling device. This device is provided with an outer cylinder member 53 which is swung by a rotary drive mechanism 52 on an elevating table 51, and is attached to the outer cylinder member 53 so as to be extendable and contractible. A work gripping device 55 is attached to the tip of the support rod 54. In this gripping device, in order to grip a work in a high heat state, a chuck 56 that directly grips the work and a driving machine 57 that drives the chuck are separately provided, and both are connected by a rod 58 to provide a driving force. I am trying to communicate.

As shown in FIGS. 13 and 14, the conventional chuck 56 in the above-mentioned work gripping device is provided with a pair of gripping bars 59 and 60 swingably, and the tip end portions of the respective gripping bars 59 and 60. Further, gripping claws 61, 62 for gripping the work E are attached, and a link mechanism 63 for interlocking the two is provided at the rear end of each gripping bar 59, 60.

In the link mechanism 63, both gripping bars 59 and 60 and a slider 64 sliding between them are connected via connecting plates 65 and 65, and a rod 58 connecting the slider 64 and the driving machine 57. When the rod 58 is moved in the axial direction, the slider 64 linearly moves, and the two gripping bars 59 and 60 are oscillated in conjunction with each other.

[0005]

[Problems to be solved by the device]

 By the way, in the structure of the conventional chuck 56, the gripping bars 59 and 60 swing at the same timing, and in order to always grip the work E at an accurate position, the slider 64 has both gripping bars 59 and 60. It is necessary to move straight in a straight line on the bisector between 60.

However, in order to linearly move the slider 64 with high accuracy in this manner, precise machining and adjustment work are required, and there is a problem that the assembly work of the chuck takes a great deal of time.

Further, the slider 64 sliding inside the chuck 56 is liable to be worn at the sliding portion, and frequent adjustment work and slider replacement are necessary in order to maintain stable operation. is there.

On the other hand, a short cycle time of a few seconds or less is usually required for handling a forging work, and the work transfer device is supposed to swivel and ascend and descend at a high speed. A large centrifugal force is applied to 56.

In order to cope with such a centrifugal force, in the conventional work gripping device 55, as shown in FIG. 14, the crimping surfaces 67 and 68 of the gripping claws 61 and 62 are shaped to follow the outer diameter shape of the work E. The work E is sandwiched between the gripping claws 61 and 62 to prevent the work E from popping out.

However, since the surface of the work E, which is in a high temperature state due to heating, is in a softened state, there is a problem that the work surface is deformed or scratched when gripped with a strong pressure. In order to eliminate this deformation and the like, it is necessary to grip the work with a weak crimping force, but with the structure in which the crimping surfaces 67 and 68 are formed so as to adhere to the work surface as described above, the crimping force is weakened. Then, a gap is apt to occur between the pressure bonding surfaces 67 and 68 and the surface of the work, which causes backlash in gripping the work and insufficient grip force.

Therefore, a first object of the present invention is to provide a work gripping device capable of accurately interlocking and swinging a gripping rod with an extremely simple structure.

A second object of the present invention is to provide a structure of a grip claw capable of reliably gripping a work even with a large centrifugal force.

[0013]

[Means for Solving the Problems]

 In order to achieve the above-mentioned first object, the present invention provides a pair of gripping rods that are swingable so that the respective tip portions of the gripping rods move toward and away from each other, and the space between the gripping rods is attached to each gripping rod. The structure is such that arcuate gears are meshed and connected, and a drive machine is connected to the rear end of the one gripping rod.

In order to achieve the second object, according to the present invention, gripping claws for gripping a work are attached to the tip ends of a pair of gripping rods that swing in conjunction with each other, and the gripping claws for swinging work are provided at the rear ends. In a forging work gripping device in which driving machines are connected to each other, the crimping surface of the one gripping claw is an inverted V-shaped surface with respect to the work, and the crimping surface of the other gripping claw is In this case, a structure is adopted in which each of the above-mentioned pressure-bonded surfaces is formed of a file-like rough surface.

[0015]

[Action]

 In the first means, when one gripping rod is swung by the driving machine, the other gripping rod is swung in conjunction with the rotation of the arc-shaped gear. In this way, the force is transmitted by the meshing of the gears, so that an accurate interlocking movement is obtained, and no error due to wear occurs.

On the other hand, in the second means, since the work is gripped from three places between the inverted V-shaped crimping surface and the flat crimping surface, even if the crimping force is weak, the workpiece is crimped. It is centered at a fixed position between and can be gripped without rattling. Further, the file-like surface of each crimping surface prevents the work from slipping and prevents the work piece from slipping out.

[0017]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show an apparatus for automatically supplying a work to the forging machine A. The automatic supply apparatus is an aligning and supplying apparatus B for sending out the work heated in the heat treatment furnace D in an aligned state, It is composed of a work handling device C that conveys the work supplied by the device B to the press position b of the forging machine A.

In the alignment supply device B, the heat treatment furnace D and the horizontal transfer conveyor 38 are connected by a shoe 39, and a swivel table 40 and a swivel table 40 are provided at the tip of the transfer conveyor 38. The feeding means 41 for moving the work is provided, and the upper surface of the swivel table 40 is the gripping position a 1 of the work by the handling device C.

As shown in FIGS. 2 and 3, the work handling device C is provided with a base 1 for accommodating the rotary drive mechanism 2 on the lower side, and a side of the base 1 has a forging machine A. It is connected to the side of the bed 3.

As shown in FIGS. 3 and 4, a swivel base 4 is attached to the upper part of the rotary drive mechanism 2 housed inside the base 1, and is mounted on the upper surface of the swivel base 4. An outer cylinder member 7 is attached to the pair of brackets 5 via a horizontal shaft 6 so as to be vertically swingable.

A cylinder 8 for rocking the outer cylinder member 7 is connected to a rear end portion of the outer cylinder member 7, and a stopper bolt 9 for restricting a rocking amount of the outer cylinder member 7 is provided behind the cylinder 8. Is provided.

Further, two inner cylinder members 11, 12 connected by a rod driving cylinder 10 are fitted inside the outer cylinder member 7, and the supporting rod 13 is inserted inside the inner cylinder member 11 on the front side thereof. Is movably fitted. The rear end surface of the support rod 13 is connected to the rod driving cylinder 10 via the communication passage 14, and the support rod 13 is supported by the axial force applied from the rod driving cylinder 10 via the communication passage 14. It comes in and out in the front-back direction.

A forging work gripping device 15 is attached to the tip of the support rod. As shown in FIG. 5, the gripping device 15 is composed of a chuck 16 for gripping a work and a drive cylinder 17 for driving the chuck 16. The drive cylinder 17 is supported so as not to be affected by the heat of the work. It is attached to a bracket 19 provided on the rear end side of the rod 13.

As shown in FIGS. 5 to 8, the chuck 16 has a pair of gripping rods 20 and 21 swingably attached to the tip of the supporting rod 13 via a pin 22. , 21 are fixed to each other via bolts 23, arc-shaped gears 24, 25 are meshed with each other, and an operating rod 18 connected to the drive cylinder 17 is connected to the rear end of the gripping rod 20. ing.

Further, gripping claws 28 and 29 extending downward are attached to the tip ends of the gripping bars 20 and 21 via bolts 26 and positioning pins 27, respectively. A bent plate 30 having a V-shaped cross section is attached to the tip of one of the gripping claws 28. Inside the bent plate 30, a crimping surface 31 having an inverted V-shape with respect to the work E is attached. Has been formed. A flat crimping surface 32 is formed at the tip of the other grip claw 29 so as to face the crimping surface 31.

As shown in FIGS. 7 and 9, in the grip claw 28, a tip end portion 28 a including a bending plate 30 is connected to a root portion 28 b via a rotating pin 33 so as to be horizontally swingable. A regulation pin 34 that regulates the amount of swing is attached to the end of the rotation pin 33.

Further, file-like rough surfaces 35 and 36 are formed on the surfaces of the both pressure-bonding surfaces 31 and 32. These rough surfaces 35, 36 are formed by pasting woodworking files on the surface of the crimping surface, machining the surface, etc., and countless irregularities with large frictional resistance to prevent slippage between the surface and the work. It is formed by the surface.

Further, as shown in FIG. 10, the pressure-bonding surface 31 of the bending plate 30 has a concave portion 37 formed at the center thereof, and when the work E is gripped, only the outer end of the pressure-bonding surface 31 is worked. It is crimped to E so that the central part does not touch. This is to ensure that the work is received and held by a wide surface that is as stable as possible.

In the chuck 16 having the above-described structure, when the actuating rod 18 is moved forward and backward by the drive cylinder 17, as shown in FIG. The gripping claws 28 and 29 grip or release the work by the swinging motion.

In this case, as shown in FIG. 6, the work E is clamped at three positions between the inverted V-shaped crimping surface 31 and the flat crimping surface 32 (actually, the inverted V-shaped crimping surface 31 is actually Since there is a concave portion 37 at the center of the crimping surface 31, the crimping is performed from five places).

In this state, there is a gap between each of the crimping surfaces 31 and 32 and the surface of the work E, and the crimping surface of the gripping claw is not in close contact with the work surface as in the conventional structure shown in FIG. Therefore, the work E is centered at a fixed position between the crimping surfaces 31 and 32 even when the work is gripped with a slight inclination or the crimping force is weak. Therefore, the work and the crimping surfaces 31, 32 are surely brought into contact with each other, and stable gripping can be performed.

The slipping phenomenon of the work E is prevented by the suppressing action of the inverted V-shaped crimping surface 31 and the frictional resistance of the rough surfaces 35 and 36 of the crimping surfaces 31 and 32, and the work is ejected by centrifugal force. Can be blocked.

This embodiment has a structure as described above, and its operation will be described below. When the work heated in the heat treatment furnace D is sent to the swivel table 40 via the transport conveyor 38, the handling device C is swung to move the work gripping device 15 above the work gripping position a of the swivel table 40. Position.

Next, when the turning table 40 is rotated and the direction of the work E is made to coincide with the direction in which the gripping pawls 28 and 29 of the gripping device 15 grip, the outer cylinder member 7 of the handling device C swings. Then, the chuck 16 of the gripping device 15 is swung downward.

Next, the drive cylinder 17 of the gripping device 15 is actuated, the pair of gripping rods 20 and 21 is swung via the actuating rod 18, and the swivel table 40 is moved between the approaching gripping pawls 28 and 29. Hold the work above.

When the gripping jaw grips the work in this way, the outer cylinder member 7 and the support rod 13 are returned to a horizontal state, the handling device C is swung toward the forging machine A, and the gripping device 15 is moved to the press position. Position at a position facing in the direction of b.

Next, the support rod 13 of the handling device C is moved back and forth to move the work held by the chuck 16 to a position above the press position b, and then the chuck 16 is rotated downward. After that, the gripping bars 20, 21 are opened by the operation of the drive cylinder 17, and the work is set at the press position b.

By repeating the above operation and reciprocating the handling device C between the work gripping position a and the press position b, the works sent out by the carrying conveyor 38 can be successively carried to the press position b.

In the above-described embodiment, the detection of the work gripping by the gripping claws 28 and 29 is performed, for example, by providing a detector such as a touch sensor on one of the crimping surfaces 31 and 32 of the gripping claws and detecting it. Can be done by the signal of the vessel.

Further, even if the gripping claws 28, 29 shown above are attached to the gripping bars 59, 60 of the chuck 56 of the conventional structure shown in FIG. 13, the work piece is reliably prevented from coming out due to a large centrifugal force. It can be effective.

[0041]

【effect】

 As described above, in the first means of the present invention, since the pair of gripping bars are interlocked by the meshing of the gears, the precise interlocking movement can be obtained with an extremely simple structure.

Further, because of the meshing of the gears, there is an effect that there is no movement error due to wear and stable operation can be realized for a long time.

Further, in the second means of the present invention, the work is centered and prevented from coming off by the inverted V-shape and the flat crimping surface, and the rough surface of the crimping surface eliminates the slip of the work. The workpiece can be stably and reliably gripped even when centrifugal force is applied.

[Brief description of drawings]

FIG. 1 is a front view showing a work automatic supply device of a forging machine.

FIG. 2 is a plan view of the same as above.

FIG. 3 is a front view of a work handling device.

FIG. 4 is a partially longitudinal front view showing the main part of the above.

FIG. 5 is a plan view showing a work holding device.

6 is a sectional view taken along the line VI-VI in FIG.

7 is a sectional view taken along the line VII-VII in FIG.

8 is a sectional view taken along the line VIII-VIII in FIG.

9 is a sectional view taken along the line IX-IX in FIG.

FIG. 10 is a diagram showing a contact state between the pressing surface of the gripping claw and the work.

FIG. 11 is a plan view showing the operation of the gripping device.

FIG. 12 is a front view of a conventional work handling device.

FIG. 13 is a plan view showing a conventional work holding device.

FIG. 14 is a side view of the above.

[Explanation of symbols]

 15 Work Grasping Device 16 Chuck 17 Drive Cylinder 18 Actuating Rod 20, 21 Gripping Rod 24, 25 Gear 28, 29 Grip Claw 30 Bending Plate 31, 32 Crimping Surface 35, 36 Rough Surface

Claims (2)

[Scope of utility model registration request] 1. A pair of gripping rods are provided so as to be swingable so that the respective tip portions of the gripping rods move toward and away from each other, and the gripping rods are connected by meshing arc-shaped gears attached to the gripping rods. A gripping device for a forging work, in which a driving machine is connected to a rear end portion of the one gripping rod. 2. A forging work gripping device in which gripping claws for gripping a work are attached to the tip ends of a pair of gripping rods that swing in conjunction with each other, and swinging driving machines are respectively connected to the rear ends. The crimping surface of the one gripping claw is formed as an inverted V-shaped surface with respect to the work, and the crimping surface of the other gripping claw is formed as a flat surface with respect to the work. A gripping device for a forging work, characterized by being formed by a file-like rough surface.