JP3157996U - Chuck mechanism of material transfer device - Google Patents

Abstract

There is provided a chuck mechanism that can stably and reliably grip a material having a complicated shape having a large-diameter collar portion and a small-diameter shaft portion without causing the posture of the material to be lost. An arc-shaped gripping surface 41a that allows insertion of a material having a large-diameter collar part and a small-diameter shaft part and grips the large-diameter collar part at the lower end part of each claw member of the chuck mechanism in the material transfer device. Have. While providing the main nail bodies 41, 41, the front end of each main nail body 41, 41 can enter and exit from the arc-shaped gripping surface 41a, and the main nail bodies 41, 41 are formed by the arc-shaped gripping surfaces 41a, 41a. Auxiliary claw bodies 43 and 43 are provided to hold the small diameter shaft portion of the material and prevent the posture of the material from being distorted when the large diameter collar portion of the material is gripped, and the material large diameter collar portion or punch of the forging machine Is provided with retracting means for retracting the auxiliary claw bodies 43, 43 into the chuck claw bodies 41, 41 when moving along the arc-shaped gripping surfaces 41a, 41a of the main claw bodies 41, 41. [Selection] Figure 10

Description

  The present invention relates to a chuck mechanism of a material transfer device provided in a multistage forging machine that manufactures various parts.

Conventionally, as a chuck mechanism of this type of material transfer device, a main body attached to a slide member installed on a machine base of a multistage forging machine, and an upper end portion of the main body are swingably connected, and a lower end portion is opened and closed. A pair of left and right claw members, a lever member connected to the upper end portions of these claw members and extending upward, and a pair of the claw members mounted between the upper end portions of the lever members and the main body. And a spring for urging the claw member in the closing direction, and the lower end of the claw member is configured to hold the material extruded from the die of the forging machine.
JP 11-47877 A

  By the way, in the claw member in the above-described conventional chuck mechanism, the lower end claw a, a of the claw member has an arc-shaped gripping surface b, which is simply matched with the maximum outer diameter of the material X, as shown in FIG. It has a simple configuration with b. However, when the lower end claws a and a of such a claw member hold a material X having a complicated shape having a large-diameter collar portion X1 and a small-diameter hexagonal shaft portion X2 as shown in FIG. Only the large-diameter collar X1 is gripped locally. For this reason, when the material X is gripped by the lower end claws a, a of the claw member, the gripped portion is biased only to the large-diameter collar portion X1, that is, one end portion of the thin width, the gripping is very unstable and the material posture is There was a problem of being broken. In addition, there is a problem that the posture of the material is easily broken when it is transferred to the lower die. As a result, there is a problem that it is difficult to normally hit the material into the die by punching at the lower forming station.

  The present invention addresses the above-described problems, and can stably and reliably hold a material having a complicated shape having a large-diameter collar portion and a small-diameter shaft portion without losing the posture of the material. It is an object to provide a chuck mechanism in a transfer device.

In order to solve the above-described problem, a device according to claim 1 of the present application includes a main body attached to a slide member, and a pair of left and right claw members whose upper end is swingably connected to the main body and whose lower end is opened and closed. A pair of lever members connected to the upper end portions of the claw members and extending upward, and mounted between the upper end portions of the lever members and the main body, and the pair of claw members are closed via the lever members. A chuck mechanism of a material transfer device that includes a spring that biases in the direction and that grips a material having a large-diameter collar portion and a small-diameter shaft portion that are pushed out from a die of a forging machine by a lower end portion of a claw member. In addition, a main claw body having a grip surface for allowing the insertion of the material and gripping the large-diameter collar portion is provided at the lower end portion of each claw member, while a tip portion is gripped at an intermediate portion of each main claw body The main nail can be gripped from the surface. An auxiliary claw body that grips the small-diameter shaft portion of the material and prevents the posture of the material from being distorted when the large-diameter collar portion of the material is gripped by the When moving along the grip surface of the main nail body, there is provided a retracting means for retracting the auxiliary nail body into the main nail body.
The large-diameter collar is a concept including a circular collar and a polygonal collar, and the small-diameter shaft is a concept including a cylindrical shaft and a polygonal shaft. .

  Further, in the invention described in claim 2 of the present application, the gripping surface of each main claw body in the configuration described in claim 1 is formed in an arc shape, and as an evacuation means, an arc shape is formed in an intermediate portion of each main claw body. Recesses that open in the direction of the central axis of the gripping surface are provided, and a rotational axis that is orthogonal to the central axis of the arc-shaped gripping surface is provided in these concave portions, and each recess of the rotational shaft is Auxiliary claw bodies are respectively fixed to the corresponding positions, and the tip of the auxiliary claw body is provided so as to be able to go in and out from the arc-shaped gripping surface of the main claw body by rotation of each rotation shaft, while one end portion of each rotation shaft Is protruded outward from the main claw body, and a rocking lever is provided at the protruding portion, and both the rocking levers are elastically pulled so that the tips of both auxiliary claw bodies are always arcuate of the main claw body. The structure is provided with an ammunition machine that protrudes outward from the gripping surface. When the large-diameter collar of the material interferes with the auxiliary nail when it is pushed out of the sleeve and moves along the arc-shaped gripping surface of the main nail, the auxiliary nail is swung against the ammunition to assist When the nail body is retracted into the main nail body and the punch pushes the material to the die side during molding, the retraction bar is provided on the punch side to swing the swing lever against the machine to assist the auxiliary nail body. The main nail body is retracted.

  According to the present invention, a main claw body having a gripping surface that allows insertion of a material having a large-diameter collar and a small-diameter shaft at the lower end of each claw member of the chuck mechanism in the material transfer device and grips the large-diameter collar. On the other hand, when the main claw body grips the large-diameter collar portion of the material by the gripping surface, the small-diameter shaft portion of the material can be moved outward from the gripping surface at the middle part of each main claw body. Since the auxiliary claw body is provided to prevent the posture of the material from being distorted, the main claw body and the auxiliary claw body even if the material has a complicated shape having a large-diameter collar part and a small-diameter shaft part. Thus, the material can be reliably gripped at two locations, ie, the large-diameter collar portion and the small-diameter shaft portion of the material without causing the material posture to be lost. As a result, accurate forging can be performed with the lower die and punch. In addition, when the large-diameter collar portion of the material or the punch of the forging machine moves along the grip surface of the main nail body, a retracting means for retracting the auxiliary nail body into the main nail body is provided. Problems due to interference between the auxiliary claw body protruding outward from the gripping surface and the material or punch can be avoided.

  In addition, the gripping surface of each main claw body is formed in an arc shape, and further, as a retracting means, a recess opening toward the central axis direction of the arc-shaped gripping surface is provided in the middle part of each main claw body. At the same time, a rotation axis orthogonal to the central axis of the arc-shaped gripping surface is provided in these recess portions, and auxiliary claw bodies are respectively fixed to positions corresponding to the respective recesses of these rotation axes, and By rotating, the tip of the auxiliary claw body is provided so as to be able to go in and out from the arc-shaped gripping surface of the main claw body, while one end portion of each rotating shaft protrudes outward from the main claw body and swings to the protruding portion. In addition to providing a lever, there is a configuration in which an elastic device is provided that elastically pulls both the swing levers so that the tips of both auxiliary claw bodies protrude outwardly from the arc-shaped gripping surface of the main claw body. When the material is pushed out of the die and moves along the arc-shaped gripping surface of the main claw, When the large-diameter collar part of the arm interferes with the auxiliary nail body, the auxiliary nail body is swung against the ammunition to retreat the auxiliary nail body into the main nail body. If the auxiliary claw body is retracted into the main claw body by swinging the swing lever against the machine with the retraction bar projecting on the punch side, a part of the arc will be removed from the arc-shaped gripping surface. This makes it possible to smoothly avoid interference between the auxiliary claw body projecting in the direction of the material and the large diameter buttock or punch of the material.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The figure shows a chuck mechanism in a material transfer device according to the present invention. As shown in FIGS. 1 and 2, the material transfer device A is provided above a machine base 1 of a multistage pressure molding machine, and its rear part is a support shaft. 11 has a swing frame 13 supported by the bearing portions 12 and 12 of the machine base 1 so that the front portion can swing upward, and left and right side members 13 a and 13 b of the swing frame 13. Between the two guide shafts 14 and 15 temporarily provided between them, a slide member 16 is freely slidable in the left-right direction, that is, in the direction in which a plurality of (three in the figure) dies 2a to 2c provided in the machine base 1 are arranged. It is mated.

  A drive rod 17 is connected to the right end of the slide member 16 in the drawing, and the slide member 16 is interposed via the rod 17 in synchronism with a reciprocating movement of a ram (not shown) that moves toward and away from the front surface of the machine base 1. Is reciprocated left and right.

  A plurality (three in the figure) of chuck mechanisms 3A to 3C are attached to the front surface of the slide member 16, and the chuck mechanisms 3A to 3C are connected to adjacent dies by the reciprocating movement of the slide member 16 in the horizontal direction. The material X received from the upper die is supplied to the lower die, respectively.

  Each of the chuck mechanisms 3A to 3C includes a main body 30 attached to the slide member 16 as shown in FIGS. 3 and 4, and a left and right pair whose upper end is swingably connected to the main body 30 and whose lower end is opened and closed. Claw members 31, 31, lever members 32, 32 connected to upper ends of the claw members 31, 31 and extending upward, and between the upper ends of the lever members 32, 32 and the main body 30. The springs 33, 33 and the like that are mounted and bias the pair of claw members 31, 31 in the closing direction via the lever members 32, 32 are pushed out of the die by the knockout pins by the lower ends of the claw members 31, 31. The material X is gripped. The structure of the upset first chuck mechanism 3A located on the leftmost side in FIG. 1 is different from the chuck mechanism that is the gist of the present invention, and therefore only a part of the structure is omitted.

  The claw members 31, 31 in the second and third chuck mechanisms 3 </ b> B, 3 </ b> C described above have a large-diameter collar (showing a thin disk shape in the drawing) X <b> 1 and a small-diameter shaft (6 in the drawing). It has a square-axis shape.) When gripping a material X having a complicated shape having X2, it grips at two locations, the large-diameter collar portion X1 and the small-diameter shaft portion X2, and prevents the posture of the material X from being broken. An auxiliary nail body is provided. Here, since the second chuck mechanism 3B has the same structure as that of the third chuck mechanism 3C and exhibits the same operational effects, the configuration and operational effects of the third chuck mechanism 3C located on the rightmost side will be described below. The description of the configuration and operation and effects of the second chuck mechanism 3B will be omitted.

  Specifically, as shown in FIGS. 5 to 8, the lower end of the claw members 31, 31 in the third chuck mechanism 3 </ b> C has a large-diameter flange portion X <b> 1 and a small-diameter shaft portion (in the figure, a hexagonal shaft shape). Block-shaped main claws 41, 41 having an arc-shaped gripping surface 41a that allows the insertion of the material X having X2 and grips the large-diameter collar portion X1 are provided. And the recessed part 41b, 41b opened to circular arc-shaped holding surface 41a, 41a is provided in the intermediate part of each main nail | claw body 41, 41, and arc-shaped holding surface 41a, 41a of these concave parts 41b, 41b part is provided. Rotating shafts 42, 42 orthogonal to the central axis are provided, and auxiliary claw bodies 43, 43 are respectively fixed at positions corresponding to the recesses 41 b, 41 b of these rotating shafts 42, 42, and the respective rotating shafts 42, 42. , The front end portions of the auxiliary claw bodies 43, 43 are provided so as to be able to go in and out from the arc-shaped gripping surfaces 41a, 41a of the main claw bodies 41, 41. Further, one end portion of each of the rotating shafts 42 and 42 protrudes outward from the main claws 41 and 41, and L-shaped swing levers 44 and 44 are provided on the protruding portions 42a and 42a. One elastic machine (coil spring) 45 is interposed between the one end portions 44a, 44a of the swing levers 44, 44. As shown in FIG. 7, one end portions 44 a and 44 a of both swing levers 44 and 44 are always pulled close to each other by the ammunition machine 45, and accordingly, both auxiliary members are connected via the rotating shafts 42 and 42. The claws 43 and 43 are held in positions so that their tips protrude outwardly from the arc-shaped gripping surfaces 41a and 41a of the main claw bodies 41 and 41 as indicated by the solid lines in FIG. Further, as shown in FIG. 7, the retraction bars 6 and 6 project from the punch holder 50 holding the punch 5 so as to correspond to the other ends 44 b and 44 b of the swing levers 44 and 44. When the punch 5 pushes the material X to the die 2c side during molding by the retracting bars 6 and 6, the retracting bars 6 and 6 come into contact with the other end portions 44b and 44b of the swing levers 44 and 44, respectively. As shown in FIG. 10, the swing levers 44 and 44 are swung against the bullet machine 45 so that the auxiliary claw bodies 43 and 43 are retracted into the main claw bodies 41 and 41 as indicated by phantom lines in FIG. It is configured.

  In the embodiment shown in the figure, the small-diameter shaft portion X2 of the material X has a hexagonal shaft shape, so that the tips of the auxiliary claw bodies 43, 43 that grip the small-diameter shaft portion X2 are shown in FIG. As shown, V-grooves are formed.

  Next, the operation of the chuck mechanism of the material transfer device will be described.

  First, as shown in FIG. 1, a wire heated to a predetermined temperature is supplied to a multistage molding machine, and the material cut into a predetermined dimension by a cutter 7 is supplied to an upset station by a cutter 7 to advance a ram (not shown). Sometimes, pressurization is performed between an upset punch provided on the ram and an upset die 8 to form a flat material as shown in FIG. Then, this material is supplied by the supply member 9 to the first chuck mechanism 3A located at the upset station and is gripped between the pair of claw members.

  From this state, the slide member 16 moves to the lower side along the guide shafts 14 and 15 by the operation of the drive rod 17, whereby the chuck mechanisms 3A to 3C move to the first to third molding stations, respectively. . Thereafter, as the ram advances, the material held by the chuck mechanisms 3A to 3C is struck into the first to third dies 2a to 2c by a plurality of punches attached to the ram so as to have predetermined shapes. Molded.

  Thereafter, as the ram moves backward, the slide member 16 moves to the upper side, and the chuck mechanisms 3A to 3C are positioned again at the up station and the first and second molding stations as shown in FIG. . At this time, the material discharged from the first die 3A is gripped by the second chuck mechanism 3B, the material X discharged from the second die 2b is gripped by the third chuck mechanism 3C, and from the third die 2c. Is discharged as a finished product and carried out of the machine. Further, the next material is supplied to the first chuck mechanism 3A from the upset die 8 by the supply member 9, and the state returns to the state shown in FIG.

  Then, by repeatedly performing the above operation, a product having a predetermined shape is continuously formed. In that case, the claw member of the conventional chuck mechanism has a large-diameter collar as shown in FIG. When the material X having a complicated shape having X1 and the small-diameter shaft portion X2 is gripped by the chuck mechanism and transferred to the lower side, the posture of the material X may be lost. This is because the gripping portion by the claw member of the chuck mechanism is biased to a small portion at one end only by the large-diameter flange portion X1 of the material X.

  Therefore, in the second and third chuck mechanisms 3B and 3C of the material transfer device, the main claw members 41 and 41 of the claw members 31 and 31 hold the small diameter shaft portion X2 together with the large diameter flange portion X1 as described above. Thus, auxiliary claw bodies 43 and 43 for preventing the posture of the material X from being broken are provided to eliminate this.

  That is, for example, the material X kicked from the second die 2b by the knockout pin is pushed and held between the arc-shaped gripping surfaces 41a and 41a of the main claw bodies 41 and 41 of the claw members 31 and 31 of the third chuck mechanism 3. 10, the large-diameter flange portion X1 of the material X interferes with the auxiliary claw body 43 protruding outward from the arc-shaped gripping surface 41a of the main claw body 41. As indicated by phantom lines in FIG. 10, 43 is moved and gripped to the front side of the main claws 41, 41 while being pushed into the main claws 41, 41 against the ammunition 45 and retracted. Further, when the large-diameter collar portion X1 moves to the front side of the main claws 41, 41, the interference relationship with the auxiliary claws 43, 43 is released. The distal end portion protrudes from the arc-shaped gripping surfaces 41a and 41a by the restoring force, and grips the small-diameter shaft portion X2 in the middle in the length direction of the material X. As a result, the material X having a complicated shape having the large-diameter collar portion X1 and the small-diameter shaft portion X2 can be obtained by using the arc-shaped gripping surfaces 41a and 41a of the main claws 41 and 41 and the auxiliary claws as shown in FIGS. The material 43 can be gripped at two positions by the tip portions of the bodies 43 and 43 without being deformed. Therefore, the third chuck mechanism 3C can transfer the raw material X to the lower third molding station without being deformed and stably held, and as a result, the die 2c and the punch of the third molding station can be transferred. This makes it possible to perform accurate forging molding.

  Further, after the third chuck mechanism C moves to the third molding station, the material X gripped by the third chuck mechanism 3C by the punch 5 by the advance of the ram is struck into the third die and molded into a predetermined shape. 9, the release bars 6 and 6 attached to the lower part of the punch holder 50 at the timing before the punch 5 pushes the material X toward the third die 2 c as shown in FIG. 9 are the other ends of the swing levers 44 and 44. The levers 44 and 44 hit against the parts 44 b and 44 b and are rotated against the machine 45. By the rotation of the swing levers 44, 44, the auxiliary claw bodies 43, 43 are swung through the rotation shafts 42, 42, and the tips thereof are retracted into the main claw bodies 41, 41. As a result, the auxiliary claw bodies 43 and 43 can strike the material X against the third die 2c with the punch 5 without causing any trouble by interfering with the five punches. In addition, after the molding, the interference of the release bars 6 and 6 with the auxiliary claw bodies 43 and 43 is released as the punch retreats from the third die 2c. As a result, the main claws 41 and 41 project outward again from the arc-shaped gripping surfaces 41a and 41a. Thereafter, the slide member 16 moves to the upper stage side, and the third chuck mechanism 3C is positioned again at the second molding station as shown in FIG.

  In the above embodiment, the material X having the circular large-diameter collar portion X1 and the hexagonal small-diameter shaft portion X2 has been described. However, the large-diameter collar portion may be a polygonal collar portion, The small diameter shaft portion may be a cylindrical shaft portion.

  It is a front view of the raw material transfer apparatus provided with the chuck mechanism which concerns on this invention.   It is a schematic plan view of the same material transfer apparatus.   It is a front view of a chuck mechanism.   It is a partially cutaway front view of the chuck mechanism.   It is a front view of the main nail | claw body of the state which hold | gripped the raw material.   It is a longitudinal cross-sectional view of the main nail | claw body.   It is a bottom view of the main nail | claw body.   It is explanatory drawing seen from the bottom side which shows the attachment state to the main nail | claw body of an auxiliary | assistant nail | claw body.   It is a bottom view when a rocking lever rocks with a evacuation bar.   It is the cross-sectional view seen from the bottom side of the main nail | claw body of the state which hold | gripped the raw material.   It is conventional explanatory drawing.

A Material transfer device 3B Chuck mechanism 3C Chuck mechanism 31 Claw member 32 Lever member 33 Spring 41 Main claw body 41a Arc-shaped gripping surface 42 Rotating shaft 43 Auxiliary claw body 44 Swing lever 45 Elastic machine X Material X1 Large diameter collar part X2 Small diameter Shaft

Claims (2)

  A main body attached to the slide member, a pair of left and right claw members whose upper end portion is swingably connected to the main body and whose lower end portion opens and closes, and a pair of lever members which are connected to the upper end portions of these claw members and extend upward And a spring that is mounted between the upper end portions of these lever members and the main body and biases the pair of claw members in the closing direction via the lever members. A chuck mechanism of a material transfer device configured to grip a material having a large-diameter collar portion and a small-diameter shaft portion extruded from a die of the die, and allows the material to be inserted into the lower end portion of each claw member and has a large size. While a main nail body with a gripping surface for gripping the heel part is provided, the tip part can enter and exit from the gripping surface to the middle part of each main nail body. When gripping the groin, grip the small-diameter shaft of the material. Auxiliary claw body that prevents the material's posture from collapsing is provided, and the auxiliary claw body is moved into the main claw body when the large-diameter collar part of the material or the punch of the forging machine moves along the gripping surface of the main claw body. A chuck mechanism for a material transfer device, comprising a retracting means for retracting the material.   The gripping surface of each main claw body is formed in an arc shape, and as a retracting means, a recess that opens toward the central axis direction of the arc-shaped gripping surface is provided in the middle portion of each main claw body, and these A rotating shaft orthogonal to the central axis of the arc-shaped gripping surface is provided in the recessed portion, and an auxiliary claw body is fixed at a position corresponding to each of the recessed portions of the rotating shaft, and assists by rotation of each rotating shaft. The tip of the claw body is provided so as to be able to go in and out from the arc-shaped gripping surface of the main claw body, while one end portion of each rotating shaft protrudes outward from the main claw body, and a swing lever is provided on the protruding portion. In addition to being provided, there is a configuration in which an elastic machine is provided that elastically pulls both the swing levers so that the tips of both auxiliary pawls protrude outward from the arc-shaped gripping surface of the main pawl. When the material is pushed out of the die and moves along the arc-shaped gripping surface of the main claw body When the large-diameter collar of the material interferes with the auxiliary nail body, the auxiliary nail body is swung against the ammunition to retreat the auxiliary nail body into the main nail body, and the punch dies the material during molding. 2. The auxiliary claw body is retracted into the main claw body by swinging the swing lever against the bullet machine by a retraction bar projecting on the punch side when pushed into the side. The chuck mechanism of the material transfer device.

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