JP2002263774A - Heading machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heading machine capable of simply, easily and correctly adjusting the alignment of a punch to a die, and easily tightening a punch holder to a ram by using a small tool. SOLUTION: Through holes 7c and 7d with the diameter larger than the outside diameter of fitting bolts 12 and 13 fitted to upper and lower parts of the ram 3 are opened in upper and lower positions of the punch holder 7, and the fitting position of the punch holder 7 to the ram 3 is changeable in a play range of the through holes 7c and 7d to the fitting bolts 12 and 13. A tightening mechanism 20 comprises a nut body 16 for tightening a triangular punch holder having three sub screw parts 16b on a main screw part 16a and a corner part screwed to the fitting bolt 12 and three tightening bolts 17, 18 and 19 which are screwed in the sub screw part 16b of the nut body 16 in an advancing/ retracting manner and press the punch holder 7 toward the ram 3 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die provided on a machine base and a punch provided on a ram which moves forward and backward facing the machine base via a punch holder so as to face each of the above dies. The present invention relates to a forging machine that is forged to form a molded product having a predetermined shape.

[0002]

2. Description of the Related Art In a forging machine, when a punch and a die are set at a fixed position and a forging operation is performed, it is possible to obtain a high-precision molded product if the axes of the two may be slightly out of order. And tool life is adversely affected.

Therefore, conventionally, when a punch holder for holding a punch is fixed to a ram, a plurality of mounting bolts provided on the ram are provided, and a large insertion hole is formed on the punch holder side. The mounting position of the punch holder with respect to the ram can be changed within the allowable range, and with the center of the punch aligned with the axis of the die, tighten the hexagon nut onto the mounting bolt to secure the punch holder. It is configured to be fastened to the ram. Then, set the punch in the punch holder and the die in the die block to perform the forging operation.If the axes of the two are out of alignment, loosen the hexagon nut and place the punch holder on the ram in that state. The punch and the die are centered by changing the position by an amount that is misaligned, and fixing while maintaining the changed position.

[0004]

However, according to the punch and die fastening means described above, the hexagonal nut for fixing the punch holder is fastened by a rotating torque, so that the space between the seating surface of the nut and the mounting bolt is not provided. A torsional reaction force is generated, which requires delicate adjustment. When an inexperienced operator makes the adjustment, the alignment work is very difficult, and there is a problem that it is difficult to make an accurate adjustment. In addition, according to the above-mentioned hexagon nut, a large fastening torque is required at the time of fastening, and therefore, there is also a problem that the work must be performed using a large tool.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pressure forming machine in which the centering of a punch with respect to a die can be easily, easily and accurately adjusted, and the work of fastening a punch holder to a ram can be easily performed with a small tool. I do.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is directed to a die provided on a machine base and a ram moving forward and backward facing the machine base via a punch holder. In a forging molding machine in which a material having a predetermined shape is formed by forging a material with a punch provided to face each of the dies, a mounting bolt provided on a ram at a predetermined position of the punch holder. An insertion hole having a diameter larger than the outer diameter of the hole is provided, and the punch holder is mounted on the ram so that the position thereof can be changed within a play range of the insertion hole with respect to the mounting bolt, while a main screw portion screwed with the mounting bolt. And a nut body for fastening a punch holder having a plurality of sub-thread portions around the main screw portion, and a plurality of nuts which are screwed to the sub-thread portions of the nut body so as to be able to advance and retreat, and press the punch holder toward the ram. Book tightening Fastening mechanism composed by the bolt, characterized in that is provided.

According to a second aspect of the present invention, as a more specific configuration, a die provided on a machine base and a ram which moves forward and backward facing the machine base are opposed to the ties via a punch holder. In a forging molding machine in which a material having a predetermined shape is formed by forging a material with a punch provided on a punch, the outer diameter of a mounting bolt provided on the upper and lower parts of the ram is provided at the upper and lower positions of the punch holder. Also, a large diameter insertion hole is provided, and the punch holder is mounted on the ram so that the position thereof can be changed in the play range of each of the insertion holes with respect to the mounting bolt, while the insertion holes are formed at least on both upper side surfaces of the punch holder. A pair of left and right adjustment screws for finely adjusting the left and right positions of the insertion holes with respect to the mounting bolts; a main screw portion screwed to the mounting bolt; and a periphery of the main screw portion. And a triangular nut body for fastening a punch holder having three sub-threads at the corners thereof, and three nuts which are screwed to the sub-threads of the nut so as to be able to advance and retreat, and press the punch holder toward the ram. And a fastening mechanism comprising the fastening bolt of the above.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a multi-stage press forming machine according to an embodiment of the present invention. The forming machine 1 includes a machine base 2 and a ram that moves forward and backward with respect to the front surface of the machine base 2. 3 and
A cutter mechanism 4 provided on one side of the front surface of the machine base 1 to cut a wire (not shown) supplied from the outside to a predetermined size, and a plurality of dies 6 to 6 are arranged in parallel via a tie block 5. Further, the ram 3 is provided with a plurality of punches 8 to 8 facing the dies 6 to 6 via a plurality of punch holders 7 to 7 attached to the front surface of the ram 3. . The dies 6 to 6 and the punches 8 to 8 form a plurality of forging stations 9A to 9D. By the advance of the ram 3, the cutting blank supplied from the cutter mechanism 4 is coarsely separated at each forging station. It is designed to obtain a molded product of a predetermined shape by precision forging. Although not shown, the machine base 2 is provided with a material transfer means (not shown) for transferring the above-described cut blank over the respective forging stations 9A to 9D.

Then, as shown in FIGS.
The punch holder 7 in the second forging station is
A holding hole 7b having a split groove 7a for holding the rear end of the punch 8 is formed at the center thereof.
The portion is provided with a holding bolt 10 for the punch 8 and a separating bolt 11. At the upper and lower positions of the holder 7, mounting bolts 12, 13 provided on the upper and lower portions of the ram 3 are provided.
Insertion holes 7c and 7d are provided in these holes.
The punch holder 7 is attached to the ram 3 so that the position can be changed within the play range of the mounting bolts 12 and 13 of c and 7d. The upper part of the punch holder 7 is screwed into the insertion hole 7c on both sides thereof so as to be able to advance and retreat, respectively.
A pair of left and right adjusting screws 14 and 15 for finely adjusting the left and right positions of the insertion hole 7 c with respect to the mounting bolt 12;
For fastening a punch holder having a triangular shape having a main screw portion 16a screwed into the main screw portion 16 and three auxiliary screw portions 16b to 16b extending at the corners around the main screw portion 16a in the same direction as the main screw portion 16a. Nut body 16 and three fastening bolts 1 that are screwed into sub nuts 16 b to 16 b of nut body 16 so as to be able to advance and retreat, and press punch holder 7 toward ram 3 side.
A fastening mechanism 20 including 7, 18, and 19 is provided. On the other hand, the lower mounting bolt 13 is provided with a hexagonal fastening nut 21 for fastening the lower portion of the punch holder 7.

In the embodiment shown in the drawings, a guide plate 22 for vertically moving the punch holder 7 is interposed between the punch holder 7 and the ram 3.
A through hole 22 of the punch 8 is formed in the center of the guide plate 22.
a, and the mounting bolt 1
Large-diameter through holes 22b and 22c are formed to allow the insertion of the holes 2 and 13, and the lower pipe 22c of the plate 22 and the large-diameter end 7d 'of the lower insertion hole 7d of the punch holder 7 are connected to the connecting pipe 23. Are connected by A support member 24 fixed to the ram 3 is protruded above the guide plate 22, while a lower end portion is fixed to the guide plate 22 through the support member 24, and a support member is provided at an intermediate portion. 2
An upper / lower adjustment screw 25 having an operation nut 26 that abuts on the upper surface of the support member 4, and a lock screw 27 screwed to the support member 24 so as to be able to move up and down in the vertical direction.

The mounting structure of the punch holder 7 to the ram 3 in the forging stations 9B to 9D other than the first forging station 9A is the same as the mounting structure of the punch holder 7 to the ram 3 of the first forging station 9A. Since the structure is basically the same, the description of the specific structure and operation will be omitted.

Next, the operation of fastening the punch holder 7 to the ram 3 at the first forging station in the multi-stage forging machine having the above-described structure will be described.

The punch 8 is temporarily set on the punch holder 7 and the die 6 is temporarily set on the die block 5, and the forging operation is performed slowly, and the die 6 is misaligned in any direction with respect to the axis of the punch 8. Check if you are. Then, based on the confirmed amount of misalignment, the vertical and horizontal mounting positions of the punch holder 7 with respect to the ram 3 are changed to perform centering adjustment of the die 6 and the punch 8. That is, with respect to the vertical misalignment, the operation nut 26 of the vertical adjustment screw 25 is rotated with the fastening bolts 17, 18, 19, the nut 21, and the lock screw 27 loosened, so that the guide plate 22 is rotated. The punch holder 7 is moved up and down with respect to the ram 3, and the punch 8 and the die 6 are adjusted so that the axis heights thereof match. Then, lock screw 2
The screw 7 is screwed until it comes into contact with the upper surface of the punch holder 7, and the lower fastening nut 21 is fastened to the mounting nut 13 to fasten the lower side of the punch holder 7 and the guide plate 22 to the ram 3. On the other hand, with the nut body 16 screwed into the upper mounting bolt 12 to the intermediate position, the three fastening bolts 17, 18, 19 are tightened to press the tips of the bolts 17, 18, 19 against the punch holder. The upper sides of the punch holder 7 and the guide plate 22 are fastened to the ram 3.

Here, when the axis of the die 6 and the axis of the punch 8 are aligned in the left-right direction, for example, of the three fastening bolts 17, 18, and 19 provided on the upper nut 16, for example, the bolt 17 is slightly loosened. Thereby, the fastening bolt 1
7, the pressing of the punch holder 7 by the fastening bolts 18 and 19 is also eased, and the fastening between the punch holder 7 and the upper ram 3 of the guide plate 22 is loosened. That is, the fixing of the punch holder 7 to the ram 3 by the nut body 16 and the three fastening bolts is slightly loosened even if one of the fastening bolts 17 is slightly loosened and the other fastening bolts 18 and 19 are not loosened. It is possible to make adjustment. Then, in the loosened state, the left and right positions of the insertion holes 7c with respect to the mounting bolts 12 are adjusted by advancing and retreating the adjustment screws 14, 15 to perform the centering adjustment of the punch 8 with respect to the die 6 in the left and right direction. Then, the fastening bolt 17 is tightened again, and the tip of the bolt 17 is pressed against the punch holder 7. When the fastening bolt 17 is pressed against the punch holder 7, a reaction force of the pressing force acts on the nut body 16, and the nut body 1 is pressed.
6 is swung about the mounting bolt 12 as a fulcrum. As a result, a force for pressing the punch bolt 7 against the remaining fastening bolts 18 and 19 also acts.
As a result, the punch holder 7 and the guide plate 2 are pressed by the vertical pressing force of the three fastening bolts 17, 18, and 19.
2 is fastened to the ram 3.

As described above, the punch holder 7 is not fastened to the ram 3 by the rotation torque of the nut body 16 but is fastened by pressing the three fastening bolts 17, 18, and 19 from the vertical direction. Fastening can be performed while maintaining the precision at the time. As a result, the centering of the punch 8 with respect to the die 6 can be easily, easily, and accurately adjusted. In addition, according to the fastening bolts 17, 18, and 19, since the fastening torque may be small, the small tool 2
There is also a merit that the tightening work can be performed easily with 8.

It is needless to say that the lower mounting bolt 13 may be the same as the fastening mechanism 20 described above.

[0018]

As described above, according to the present invention, an insertion hole having a diameter larger than the outer diameter of a mounting bolt provided on a ram is provided at a predetermined position of a punch holder in a head forming machine. While the punch holder is attached to the ram so that the position thereof can be changed in the play range with respect to the bolt, a punch holder having a main screw portion to be screwed to the mounting bolt and a plurality of sub-thread portions around the main screw portion. And a fastening mechanism comprising a plurality of fastening bolts which are screwed to the auxiliary screw portion of the nut body so as to be able to advance and retreat, and press the punch holder toward the ram. When fastening to the ram, the punch holder is not fastened to the ram by the rotating torque of the nut body, but by pressing a plurality of fastening bolts provided around the nut body from the vertical direction. Since it can be fastened to maintain the die and accuracy in centering adjustment of the punch. As a result, the centering of the punch with respect to the die can be easily and accurately adjusted, and further, according to the above-mentioned fastening bolt, the fastening torque can be small, so that the fastening work can be easily performed with a small tool. There is also.

[0019] At least upper side surfaces of the punch holder are screwed into the insertion holes so as to be able to advance and retreat, respectively.
A triangular shape having a pair of left and right adjusting screws for finely adjusting the left and right positions of the insertion holes with respect to the mounting bolts, a main screw portion screwed to the mounting bolt, and three auxiliary screw portions at corners around the main screw portion. And a fastening mechanism consisting of three nuts for fastening the punch holder and three fastening bolts which are screwed to the auxiliary thread portion of the nut body so as to be able to advance and retreat, and press the punch holder toward the ram. When aligning the axes of the die and the punch in the left-right direction, any one of the three fastening bolts provided on the nut body is slightly loosened, and the upper and lower adjustment screws are moved forward and backward in this state. Fine adjustment of the left and right positions of the insertion holes with respect to the side mounting bolts, adjust the centering of the punch in the left and right direction with respect to the die, and then simply tighten the loosened bolts again with a small tool. Can be comfortably fastened punch holder ram maintains the accuracy in adjustment.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a pressure forming machine according to the present invention.

FIG. 2 is a partially cutaway side view of a main part of the pressure molding machine.

FIG. 3 is a front view of the main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multi-stage press-forming machine 3 Ram 6 Die 7 Punch holder 8 Punch 12,13 Mounting bolt 14,15 Adjusting screw 16 Fastening nut body 16a Main screw part 16b Secondary screw part 17,18,19 Fastening bolt 20 Fastening mechanism

Claims (2)

[Claims] 1. A material having a predetermined shape formed by forging a material with a die provided on a machine base and a punch provided on a ram moving forward and backward facing the machine base via a punch holder so as to face each of the dies. In a pressure forming machine that is configured to form a molded product, an insertion hole having a diameter larger than the outer diameter of a mounting bolt provided on a ram is provided at a predetermined position of the punch holder, and the insertion hole is provided with respect to the mounting bolt. While the punch holder is attached to the ram so that the position of the punch holder can be changed in the play range, a main screw portion screwed to the mounting bolt and a plurality of sub-screw portions around the main screw portion for fastening the punch holder. A forging process comprising a nut body and a fastening mechanism comprising a plurality of fastening bolts which are screwed into and out of the auxiliary screw portion of the nut body so as to be able to advance and retreat, and press the punch holder toward the ram. Machine . 2. A material formed by forging with a die provided on a machine base and a punch provided on a ram moving forward and backward facing the machine base via a punch holder so as to face each of the dies. In a pressure forming machine which is configured to form a molded product, insertion holes having a diameter larger than the outer diameter of mounting bolts provided on the upper and lower portions of the ram are provided at upper and lower positions of the punch holder. The punch holder is attached to the ram in a playable range with respect to the mounting bolt so that the position of the punch holder can be changed. On the other hand, at least upper side surfaces of the punch holder are screwed into the insertion holes so as to be able to advance and retreat, respectively. A triangular punch having a pair of left and right adjustment screws for finely adjusting the left and right positions of the hole, a main screw portion screwed to the mounting bolt, and three auxiliary screw portions at corners around the main screw portion. It is characterized in that a fastening mechanism comprising a nut body for fastening the holder and three fastening bolts which are screwed to the auxiliary thread portion of the nut body so as to be able to advance and retreat and press the punch holder toward the ram side is provided. Pressure forming machine.