JP4715549B2 - Press machine - Google Patents

Description

  The present invention relates to a press machine, and more particularly, to a press machine having a caulking process for holding a sphere in a sphere holding portion formed on a workpiece so as to be rotatable.

  As this type of press, there is known a press having a caulking process in which a sphere at a spherical caulking position is caulked by clamping a fixed mold and a movable mold movable with respect to the fixed mold. . The fixed mold is provided with a spherical body supply path (for example, a slope) so as to communicate with the spherical caulking position and to be inclined downward toward the spherical caulking position. If a plurality of spheres are loaded in the sphere supply path so as to be able to roll, the loaded spheres are successively supplied to the sphere caulking position by their own weight. In this way, since the sphere can always be supplied to the sphere caulking position, it is possible to cope with the case where the caulking process is continuously performed.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2004-114224 A

  However, in the press machine described above, the sphere is supplied to the sphere crimping position by the weight of the sphere, and the sphere is supplied to the sphere crimping position by the weight per sphere and the inclination angle of the sphere supply path. The ability (sphere supply ability) was to change. Therefore, for example, when the speed of the caulking process is increased, a problem that the supply of the sphere cannot catch up occurs. When this problem occurs, it can be solved by increasing the sphere supply capacity by increasing the inclination angle of the sphere supply path, but if the sphere supply capacity is excessively increased, the sphere is supplied to the sphere crimping position. In some cases, the ball may bulge outward from the sphere crimping position, and a new problem arises that the sphere is not supplied to the sphere crimping position.

  The present invention is intended to solve such a problem, and an object of the present invention is to provide a pressing machine that can reliably supply a sphere to a sphere crimping position for each crimping process.

The present invention is for achieving the above object, and is configured as follows.
According to the first aspect of the present invention, the sphere at the sphere caulking position is transferred to the sphere holding portion formed on the workpiece by clamping the fixed mold and the movable mold movable with respect to the fixed mold. A press having a caulking process for holding the movable mold so as to be movable, and including a spherical body supply unit that supplies the spherical body to the spherical caulking position in accordance with a mold opening operation after the movable mold is clamped. The sphere supply unit is housed in a sphere supply path capable of loading the sphere into the sphere caulking position and a plurality of pockets recessed in the outer peripheral surface by rotating toward the sphere supply path. A gear body capable of pushing the formed sphere into the sphere supply path, and a latch interlocked with the operation of the movable mold, and the gear body has a plurality of latches protruding in the radial direction. The wall is formed to be latchable with the latch, In accordance with the mold opening operation from the mold clamping operation of the movable mold, the gear body rotates toward the spherical body supply member by locking the latch with the locking wall of the gear body. .
According to this configuration, during the mold opening operation of the movable mold, the sphere is supplied to the sphere caulking position, and when the mold is clamped, the necessary number of spheres are already supplied, which causes problems such as excessive supply of the sphere and unsupply. Can be prevented. Further, according to this configuration, for example, even if the sphere is clogged in the sphere supply path for some reason and the sphere is not supplied to the sphere crimping position, the sphere is pushed into the sphere supply path by the rotation of the gear body. The sphere pushing force acts on the sphere. Therefore, the sphere in the sphere supply path can be reliably supplied to the sphere caulking position with a simple configuration.

The invention according to claim 2 is the press according to claim 1 , wherein a plurality of concave holes equal to the number of the pockets are formed on the outer peripheral surface of the gear body, The fixed mold is provided with a first stopper member that can be fitted into the concave hole, and when the gear body rotates toward the spherical body supply path, the first stopper member is formed in the concave hole. The amount of rotation of the gear body is regulated by being fitted.
According to this configuration, one sphere can be reliably supplied to the sphere supply path for each caulking process.

The invention according to claim 3 is the pressing machine according to claim 2, wherein when the sphere is pushed into the sphere crimping position, the sphere does not jump out of the sphere crimping position. It is the structure provided with the 2nd stopper member which hold | maintains a spherical body in this spherical caulking position.
According to this configuration, the sphere supplied from the sphere supply path does not jump out from the sphere crimping position.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS. FIG. 1 is a side view of the press 1 according to the present invention, and is a view for explaining a mold opening state before a caulking process. In addition, since this press machine 1 is left-right symmetric, in FIG. 1, the left half of the press machine 1 is abbreviate | omitted and only the right half of the press machine 1 is described. The same applies to FIG. 2 and subsequent figures. FIG. 2 is a side view of the press machine 1 according to the present invention, and is a view for explaining a state in the middle of mold clamping during the caulking process. FIG. 3 is a side view of the press machine 1 according to the present invention, and is a view for explaining a mold clamping completion state after the crimping process. FIG. 4 is a side view of the press machine 1 according to the present invention, and is a view for explaining a state in the middle of mold opening while the workpiece 50 is being taken out. FIG. 5 is a side view of the press 1 according to the present invention, and is a view for explaining a state in which the sphere 40 is pushed into the sphere supply path 21 while the workpiece 50 is being taken out.

  First, with reference to FIG. 1, the press 1 of this invention is demonstrated. In the caulking process of the press 1, the work 50 in which both sides are bent so that the flat metal plate has a U-shaped cross section and the spherical body holding part 51 is cut out in the bent part is formed in a forward feed. This is applied to a part of the process. For this reason, the steps before and after the caulking step are conventionally known steps, and thus detailed description thereof is omitted.

  The press machine 1 is configured to clamp a spherical body 40 at a spherical caulking position 11 by clamping a lower mold 10 which is a fixed mold and an upper mold 30 which is a movable mold movable with respect to the lower mold 10. And a caulking process for holding the spherical body holding part 51 so as to be rotatable.

  First, the lower mold 10 of the press machine 1 will be described. The lower mold 10 is provided with a lifter 24 that is always urged upward by an elastic force by an elastic body (not shown). The upper end portion of the lifter 24 can lift the workpiece 50 by supporting the lower end of the workpiece 50. Note that two lifters 24 are arranged side by side along the forward feed direction of the workpiece 50 (in FIG. 1, for example, from the back to the front of the page). The spherical caulking position 11 is arranged so as to be sandwiched between the lifters 24.

  The lower mold 10 is provided with a sphere supply path 21 that can load the sphere 40 into the sphere crimping position 11 and a gear body 22 that rotates toward the sphere supply path 21. The gear body 22 includes a plate A having a plurality of (eight in FIG. 1) pockets 22a recessed in the outer peripheral surface and a plurality (eight in FIG. 1) recessed holes recessed in the outer peripheral surface. The plate B having 22c and the plate C having a plurality of (eight in FIG. 1) locking walls 22b projecting in the radial direction are concentric from the front side to the back side in FIG. It is integrally formed so that it becomes.

  The gear body 22 is rotatably supported with respect to the lower mold 10 so that the sphere 40 accommodated in the pocket 22a of the plate A can be pushed into the sphere supply path 21. Further, the locking wall 22b of the plate C is formed to be locked with the latch 31 of the upper mold 30 only in accordance with the mold opening operation from the mold clamping operation of the upper mold 30. That is, the locking wall 22b of the plate C is not locked with the latch 31 of the upper mold 30 according to the mold clamping operation from the mold opening operation of the upper mold 30.

  The lower mold 10 is provided with a first plunger 23. The first plunger 23 includes a cylindrical case 23a, a compression spring 23b disposed in the case 23a, and a spherical stopper 23c. As shown in the right side enlarged view of FIG. 1, the first plunger 23 is provided so that a part of the stopper 23 c can be fitted into the concave hole 22 c of the gear body 22.

  Further, the lower mold 10 is provided with a second plunger 25. The second plunger 25 has the same configuration as the first plunger 23, and includes a case 25a, a compression spring 25b, and a stopper 25c. As shown in the left enlarged view of FIG. 1, the second plunger 25 is provided so that a part of the stopper 25 c protrudes to the spherical caulking position 11.

  Next, the upper mold 30 of the press machine 1 will be described. The upper mold 30 has an arm 33 extending downward on its side. A latch 31 is pivotally supported at the tip end (lower end in FIG. 1) of the arm 33 so as to be rotatable around a shaft 31a. When the latch 31 is provided in this manner, the upper mold 30 is interlocked with the mold clamping operation and the mold opening operation. This corresponds to the “latch interlocked with the operation of the movable mold” described in the claims. Further, both ends of the tension spring 32 are fastened between the arm 33 and the latch 31. The arm 33 is provided with a restricting protrusion 33a, and the restricting protrusion 33a restricts the rotation direction of the latch 31 to only one direction (clockwise direction in FIG. 1).

  The “sphere supply path 21” and the “gear body 22” provided in the lower mold 10 of the press machine 1 and the “latch 31” provided in the upper mold 30 are “spheres” described in the claims. This corresponds to the supply unit 20 ”. The configuration in which the “sphere supply path 21” and the “gear body 22” are provided in the lower die 10 and the configuration in which the “latch 31” is provided in the upper die 30 are not limited. As long as the spherical body 40 can be supplied to the spherical caulking position 11 in accordance with the mold opening operation after clamping the mold 30, the upper and lower molds 10 and 30 may be configured.

  Next, the operation of the press machine 1 will be described. As shown in FIG. 1, when the workpiece 50 is sent while being lifted by the lifter 24, the upper die 30 is lowered toward the lower die 10. In the state of FIG. 1, the sphere 40 has already been supplied to the sphere crimping position 11. Eventually, as shown in FIG. 2, the latch 31 of the upper die 30 interferes with the locking wall 22b of the gear body 22 of the lower die 10, so that the latch 31 rotates clockwise as shown in the figure. At this time, the latch 31 rotates against the elastic force of the tension spring 32.

  Further, when the upper die 30 is lowered toward the lower die 10, the lower end of the work 50 pushes down the tip (upper end) of the lifter 24, so that the spherical body 40 at the spherical caulking position 11 is moved as shown in FIG. It is crimped so as to be rotatably held by the spherical body holding part 51 formed in 50. This state is a mold clamping state. At this time, the lifter 24 is pushed down against the elastic force. At this time, since the interference between the latch 31 and the locking wall 22b described in FIG. 2 is released, the latch 31 is returned to the state before rotating (the state shown in FIG. 1) by the elastic force of the tension spring 32. Returned.

  Next, when the upper die 30 is raised against the lower die 10 (when the die is opened), the lifter 24 is raised by the elastic force as shown in FIG. The lower end of 50 will be lifted. At this time, the sphere 40 crimped to the workpiece 50 and the stopper 25c of the second plunger 25 interfere with each other, but the stopper 25c is pushed into the case 25a against the elastic force of the compression spring 25b. Become. Therefore, the sphere 40 crimped to the workpiece 50 and the stopper 25c of the second plunger 25 are not locked. When the interference between the sphere 40 crimped to the workpiece 50 and the stopper 25c of the second plunger 25 is released, a part of the stopper 25c again protrudes to the sphere crimping position 11 by the elastic action of the compression spring 25b. It will be.

  When the workpiece 50 is lifted by the lifter 24, the spherical caulking position 11 becomes a blank (gap), and the spherical body 40 is supplied from the spherical supply path 21 to the spherical caulking position 11 by its own weight. At this time, as already described, since a part of the stopper 25c of the second plunger 25 protrudes to the spherical caulking position 11, the spherical body 40 supplied from the spherical supply path 21 is outward from the spherical caulking position 11. Never jump out.

  Further, when the upper die 30 is lifted in this way, the latch 31 of the upper die 30 interferes with the locking wall 22b of the gear body 22 of the lower die 10. At this time, the latch 31 cannot rotate because the rotation is restricted by the restricting protrusion 33a. As a result, as shown in FIG. 5, the latch 31 is locked with the locking wall 22b, and the latch 31 rotates the gear body 22 as the upper mold 30 is raised (in FIG. 5, the counterclockwise direction). To rotate). With the rotation of the gear body 22, the sphere 40 stored in the pocket 22 a is pushed into the sphere supply path 21.

  Thereby, for example, even when the sphere 40 is clogged in the sphere supply path 21 for some reason and the sphere 40 is not supplied to the sphere crimping position 11, the sphere supply path is pressed by the rotation of the gear body 22. A sphere pushing force acts on the sphere 40 in 21. Therefore, the sphere 40 in the sphere supply path 21 can be reliably supplied to the sphere crimping position 11 with a simple configuration. Therefore, the sphere 40 is reliably supplied to the sphere crimping position 11 when the upper mold 30 is opened, and the necessary number of spheres 40 are already supplied when the mold is clamped. You can prevent problems.

  When the gear body 22 starts to rotate, the stopper 23c of the first plunger 23 comes out of the concave hole 22c of the gear body 22 (see the enlarged view on the right side in FIG. 5), and the outer peripheral surface of the gear body 22 is a compression spring. The stopper 23c is pushed in against the elastic force of 23b. Eventually, when the latch 31 and the latch wall 22b are unlocked, the gear body 22 continues to rotate due to inertia, but the stopper 23c is again adjacent to the concave hole 22c before the rotation. By fitting in 22c, the rotation of the gear body 22 is restricted to 1/8 rotation. Thus, only one spherical body 40 can be supplied to the spherical body supply path 21 by rotating the gear body 22 by 1/8. Thereby, one spherical body 40 can be reliably supplied to the spherical body supply path 21 according to the mold opening operation from the clamping state of the upper mold 30 (for each crimping process). Then, when the upper die 30 is further raised, the state shown in FIG. 1 is restored, and thereafter, the above-described operation is repeated.

  Furthermore, according to the press machine 1 having the above-described configuration, even when the caulking process is speeded up, the latch 31 of the upper mold 30 and the locking wall 22b of the lower mold 10 are locked for each caulking process. In addition, the spherical body 40 can be reliably supplied to the spherical caulking position 11 by rotating the gear body 22.

The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In the embodiment, the case where the fixed mold is the lower mold 10 and the movable mold is the upper mold 30 has been described as an example. However, the present invention is not limited to this, and the fixed mold and the movable mold may be upside down.

FIG. 1 is a side view of the press 1 according to the present invention, and is a view for explaining a mold opening state before a caulking process. FIG. 2 is a side view of the press machine 1 according to the present invention, and is a view for explaining a state in the middle of mold clamping during the caulking process. FIG. 3 is a side view of the press machine 1 according to the present invention, and is a view for explaining a mold clamping completion state after the crimping process. FIG. 4 is a side view of the press machine 1 according to the present invention, and is a diagram for explaining a state in the middle of mold opening while the workpiece 50 is being taken out. FIG. 5 is a side view of the press 1 according to the present invention, and is a view for explaining a state in which the sphere 40 is pushed into the sphere supply path 21 while the work 50 is being taken out.

Explanation of symbols

1 Press machine 10 Lower mold (fixed mold)
11 Spherical caulking position 20 Spherical body supply portion 21 Spherical body supply path 22 Gear body 22a Pocket 22b Locking wall 22c Recessed hole 23c Stopper (first stopper member)
25c Stopper (second stopper member)
30 Upper mold (movable mold)
31 Latch 40 Sphere 50 Work 51 Sphere holder

Claims (3)

Caulking that holds the sphere at the spherical caulking position so that it can rotate freely on the spherical holding part formed on the workpiece by clamping the fixed mold and the movable mold movable relative to the fixed mold. has a process,
In accordance with a mold opening operation after clamping the movable mold, the press includes a spherical body supply unit that supplies the spherical body to the spherical caulking position ,
The spherical body supply unit
A sphere supply path capable of loading the sphere into the sphere crimping position, and a sphere stored in a plurality of pockets recessed in the outer peripheral surface by rotating toward the sphere supply path is pushed into the sphere supply path. It consists of a possible gear body and a latch linked with the operation of the movable mold,
The gear body is formed with a plurality of locking walls projecting in the radial direction so as to be locked with the latch, and the latch is operated in accordance with a mold opening operation from a mold clamping operation of the movable mold. A press machine in which the gear body rotates toward the spherical body supply member by being locked with the locking wall of the gear body. The press according to claim 1,
On the outer peripheral surface of the gear body, a plurality of concave holes that are the same as the number of the pockets are formed,
The fixed mold is provided with a first stopper member that can be fitted into the concave hole,
A press machine in which the rotation amount of the gear body is regulated by fitting the first stopper member into the concave hole when the gear body rotates toward the spherical body supply path. The press according to claim 2,
A press machine comprising a second stopper member for holding the sphere in the sphere crimping position so that the sphere does not jump out of the sphere crimping position when the sphere is pushed into the sphere crimping position.

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