JPS6320435Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heading machine that performs heading work using a plurality of molds such as dies and punches.

Conventionally, this type of header, which is a heading machine, has a structure in which a die, which is a mold, is fixed to a die block fixed to a frame, and a punch, which is a mold, is fixed to a punch block fixed to one of the rams.

By the way, when heading work is performed for a certain period of time, the punches and dies wear out and deform, so it is necessary to replace the punches and dies periodically, but when replacing the punches and dies, the alignment of the punches and dies is insufficient. Since the machining accuracy deteriorates, it is necessary to carefully align the punch and die. However,
With conventional structures, for example, to replace a die, insert your hand into the narrow space between the die and punch in the frame of the header, loosen the die tightening bolt, remove the die, and then insert the new die. Insert it into the fixing recess formed in the die block,
It is necessary to tighten the bolts mentioned above to secure the die to the die block, and this work requires reaching into a narrow space within the frame, which makes the work cumbersome and requires replacing the die. There was a problem in that the process took a long time and the operating rate of the header decreased. Moreover, in general, in order to improve the alignment accuracy between the punch and the die, the clearance between the die and the fixing recess of the die block, which is required when inserting the die, is set small, which is useful for labor-saving or unmanned machines such as robots. When a die changing device is installed, the accuracy of the die insertion position and stop of the die changing device must be improved, which complicates the configuration of the die changing device and makes the die changing device expensive. and became a serious obstacle to achieving automation.

The present invention was developed in view of the above circumstances, and its purpose is to facilitate the replacement of molds with a simple configuration, to shorten the work time and save labor in the replacement work, and to achieve this. The object of the present invention is to provide a heading machine that can be automated at low cost.

In order to achieve this object, the present invention is such that a block to which a mold such as a die or a punch is fixed is removably mounted on the block mounting section of a heading machine, and the block is mounted on a block mounting section of a heading machine. A block elevating mechanism is provided for moving the block in and out of the block mounting portion by raising or lowering the block, and a positioning member for positioning the block is provided in this block elevating mechanism. The structure includes a block fixing mechanism for fixing the block housed in the block mounting section.

According to this configuration, when replacing the mold, the block is first unfixed by the block fixing mechanism, the block is detached from the block mounting section by the block lifting mechanism, and then the block is replaced. It is sufficient to replace the block with a new one with a new mold in advance at a convenient location, set it on the block mounting part using the block lifting mechanism, and fix it using the block fixing mechanism. At this time, when a new block is placed on the block lifting/lowering mechanism, the positioning of the block is done by the positioning member, and the block is set in the block mounting portion without shifting its position.

In this case, the mold can be replaced as a block, making it easy to replace the mold. Moreover, the means for exchanging blocks can be constructed with a relatively simple mechanism consisting of a block lifting mechanism that performs simple lifting and lowering operations, a positioning member, and a block fixing mechanism, thereby avoiding complication of the configuration. Furthermore, since the mold exchange method involves removing the block from the block mounting part using the block lifting mechanism and replacing it with a new block, even when automating mold exchange (block exchange), it is difficult to replace the block that was conventionally considered. Unlike automatic mold changing equipment, which does not require highly precise and complex operations, it is a simple device that performs the simple operation of replacing blocks on a block lifting mechanism, making it possible to automate mold changing at low cost. can be achieved.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Reference numeral 1 designates a frame of a header which is a heading machine, and a subframe 4 is fixed to a recess 2 provided in the frame 1 so as to face a ram (not shown) via a plate 3. A rectangular block mounting portion 5 with an open top and front surface is provided. Reference numeral 6 denotes a substantially rectangular block that is detachably mounted in the block mounting portion 5 by means described later.
At a predetermined position on the front surface thereof, a mounting hole 7 having tapered portions 7a, 7a as a pair of mold fixing recesses is provided.
7 (see FIG. 2), and in both mounting holes 7, 7, first and second dies 8, 9, which are molds, are formed with cylindrical collets 10, 10 having tapered portions 10a, 10a on the outer periphery. It is tightened and fixed with a bolt 12 via collet holders 11, 11. Reference numeral 13 denotes a roughly rectangular chuck unit located on the right side of the subframe 4 and fixed to the recess 2 by bolts, and this chuck unit has a piston that is slidably moved by hydraulic pressure into a cylinder portion 14 formed by machining. 15, the tip of a piston rod 15a integrally protruding from the piston 15 is oriented diagonally backward to the left so that it can protrude from the chuck unit 13 into the block mounting portion 5. The piston 15 of the chuck unit 13 is actuated to press the tip of the piston rod 15a against the slope 6a formed on the right side of the block 6, thereby pressing the block 6 against the left side of the block mounting portion 5. On the other hand, in FIGS. 1 and 3, reference numerals 16 and 16 denote a pair of clamp devices located at the lower part of the block mounting portion 5 and provided on the subframe 4. Both clamp devices 16,
16 is a cylinder portion 1 formed by machining.
7, a piston 18 disposed in the cylinder portion 17 so as to be slid by hydraulic pressure, and a clamp body 19 directly connected to the piston 18. When activated, the piston 18 and the clamp bodies 19, 19
By moving the clamp bodies 19 backward (in the direction of arrow A shown in FIG. 2), the tips of the clamp bodies 19, 19 are brought into pressure contact with the front lower part of the block 6, and the block 6 is brought into pressure contact with the back surface of the block mounting portion 5. That's what I do. These two clamp devices 16, 16 and the chuck unit 13 constitute a block fixing mechanism. In addition, 20 is a clamp device 16
This is a compression coil spring provided within the cylinder portion 17 to urge the piston 18 forward (in the opposite direction of arrow A). Therefore, in Figures 1 and 4,
Reference numeral 21 denotes a block lifting mechanism provided on the frame 1, which will be explained below. Reference numeral 22 denotes a shaft support cylinder fixed to the frame 1 so as to be oriented in the horizontal direction, and a drive shaft 24 is rotatably inserted and supported inside this cylinder via bearings 23, 23. A gear 25 rotatably driven by a motor (not shown) is fitted to the right end of the drive shaft 24, and a bevel gear 26 is fitted to the left end. On the other hand, 27 is a shaft support cylinder whose upper end is fixed to the lower surface side of the subframe 4 so as to be oriented in the vertical direction. 30 is rotatably inserted and supported, and a bevel gear 31 that meshes with the bevel gear 26 is fitted into the lower end of the rotating member 30. 32 is a rotating member 29
A cylindrical collar press-fitted into the inner circumference of the upper end.
A female threaded portion 32a is formed on the inner circumferential portion of this. Reference numeral 33 denotes a lifting rod inserted into the rotating member 29, and a male threaded portion 3 is provided on the outer periphery of the rod.
3a is formed, and this male threaded portion 33a is screwed into the female threaded portion 32a of the collar 32. 3
Reference numeral 4 denotes a rectangular lifting plate fixed to the upper end of the lifting rod 33, which is fitted into a rectangular recess 35 formed in the subframe 4 so as to be vertically movable. A guide pin 35a is provided on the lower surface of this elevator board 34.
is fixed, and this guide pin 35a is attached to the shaft support cylinder 2.
It is inserted into a vertically long locking hole 27a formed in 7 so as to be able to move up and down, thereby preventing the elevator plate 34 from rotating. Reference numerals 36 and 36 denote a pair of protruding pins serving as positioning members provided on the upper surface of the elevating plate 35, and each protruding pin 36 is fitted into a cylinder portion 37, 37 with an open top end formed on the elevating plate 34 so as to be vertically movable. When hydraulic pressure is applied to the cylinder parts 37, 37, they protrude a predetermined length from the upper surface of the lifting plate 34, and when the hydraulic pressure is removed, they return downward due to the biasing force of a return spring (not shown), and the lifting plate 34 It is designed to be depressed to a level that is flush with the top surface or lower. Note that a protruding pin 3 is provided on the bottom surface of the block 6.
Positioning holes 38, 38 into which 6, 36 are inserted are bored.

Next, the operation of the above configuration will be explained. 1st
And before the second dice 8, 9 reach the replacement time,
New first and second dies 8 and 9 are fixed in advance to another block 6, which is the same as the block 6, in a predetermined positional relationship. Therefore, in order to replace both the first and second dies 8, 9 when the forging work is performed for a certain period of time and it is time to replace them, first remove the hydraulic pressure acting on the cylinder part 17. The clamp bodies 19, 19 are moved forward (in the direction of arrow A shown in FIG. When the hydraulic pressure acting on the cylinder portion 14 is removed and the piston 15 is returned in the direction of arrow The fixed state of is completely released. After that, when the motor (not shown) is rotated in the forward direction, the rotating member 30 is rotated in the forward direction (rotation in the direction of arrow B) via the drive shaft 24 and the pair of bevel gears 26 and 31.
be done. However, since the lifting plate 34 fixed to the upper end of the lifting rod 33 is prevented from rotating by the guide pin 34a inserted into the locking hole 27a, the lifting rod 33 is not screwed upward when the rotating member 30 rotates forward. As a result, the elevator plate 34 is raised. At this time, the protruding pins 36, 36 are raised in advance by hydraulic pressure and protrude from the upper surface of the elevating plate 34, and as the elevating plate 34 is raised, the protruding pins 36, 36 are first moved into the positioning holes 3 of the block 6.
8, 38, and the block 6 is inserted into the elevator plate 3.
4 is restricted from moving in the left-right direction or front-back direction, and then the lower surface of the block 6 comes into contact with the upper surface of the elevator plate 34, and the block 6
is lifted while being placed on the lifting platform 34, and when the block 6 finally escapes from the block mounting portion 5 and reaches a predetermined position above, the motor is stopped and the lifting of the block 6 is stopped. At this position, the hydraulic pressure to the cylinder parts 37, 37 is removed and the protruding pin 3
6, 36 are lowered, and the protruding pins 36, 36 are lowered.
The blocks 6 are brought out of the positioning holes 38, 38, ie, the block 6 is allowed to slide on the elevator plate 34. In this state, the block 6 is slid, for example, in the horizontal direction by a transport mechanism (not shown) and taken out from the elevator plate 34, and then, in place of this block 6, the block to which the aforementioned new first and second dies are fixed is replaced. Similarly, by a transport mechanism (not shown), for example, the elevator plate 3 is slidably moved in the horizontal direction.
4. Place it in the predetermined position. After that, cylinder part 3
7, 37 by applying hydraulic pressure to the protruding pins 36, 36.
the positioning hole 3 of the block 6 by protruding upward.
8, 38, thereby positioning the block 6 with respect to the elevator plate 34. Thereafter, the motor of the block lifting mechanism 21 is rotated in the opposite direction to screw the lifting rod 33 downward.
The upper block 6 is lowered, and the block 6 is placed on the block mounting portion 5, ie, in the state shown in FIG. 1. And check unit 1
The piston 15 of No. 3 is operated to project its piston rod 15a, and the tip of the piston rod 15a is brought into pressure contact with the slope portion 6a of the block 6.
Furthermore, the cylinder portion 1 of both clamp devices 16, 16
Hydraulic pressure is applied to block 6 to move both clamp bodies 19 backward (in the direction indicated by arrow A in FIG. 3) against the biasing force of compression coil spring 20, thereby moving both clamp bodies 19, Press (clamp) the lower front of the By the above-described operation, the block 6 is held in the mounted state in the block mounting portion 5. In this case, the block 6 removed from the block mounting part 5 at the time of replacement without preparing another block 6
Alternatively, new dice 8 and 9 may be replaced.

According to this first embodiment, the dice 8,
When replacing the block 9, the block 6 is removed from the block mounting part 5 by the block lifting mechanism 21, and then this block 6 is replaced with a new block with a new die attached. It is set in the block mounting part 5 by the block lifting mechanism 21 and the block fixing mechanism (chuck unit 13
and clamp device 16),
The work of replacing the dies 8 and 9 for the block 6 can be done in a wide area outside the frame 1, so even if the fitting clearance between the dies 8 and 9 and the mounting holes 7 and 7 is small, the setting work can be done in a wide place. This eliminates the need for the troublesome work of conventional structures, such as loosening the bolt 12 in a narrow space within the frame 1 and replacing both dies 8 and 9. It can save time. Moreover, the lifting and lowering movement of the lifting plate 35 and the replacement of the block 6 are performed by the block lifting mechanism 21 and the block 6.
This can be automated using a simple device with low dimensional accuracy, such as a conveyor mechanism that slides on the elevator plate 35, so it is possible to automate the process by moving the die directly and stopping it so that it matches the mounting hole with high dimensional accuracy. Automation can be achieved at a lower cost than using complicated exchange equipment, which was previously considered.

In the above embodiment, the sub-frame 4 fixed to the frame 1 is provided with the block mounting part 5, and the block 6 to which the dice 8 and 9 are fixed is removably provided. 5 may be provided directly on the frame 1, or a block mounting portion may be provided on the ram and a block to which a punch as a mold is fixed may be removably provided.

Further, mounting holes for mounting the dies 8 and 9 on the block 6 are formed in a circular shape, and the collections 10 and 9 are mounted in the mounting holes.
Alternatively, the die may be formed into a tapered shape and the die may be directly mounted into the tapered mounting hole.

FIG. 5 shows a second embodiment of the present invention, in which the same parts as those in the first embodiment are given the same reference numerals and explanations will be omitted, and only the different parts will be explained.
That is, the second embodiment is characterized in that the lifting plate 34 of the block lifting mechanism 39 is raised and lowered by a hydraulic cylinder 40, and the hydraulic cylinder 40 is arranged such that its piston rod 40a is directed upward. and the piston rod 40a
A lift plate 34 is fixed to the upper end of the plate.

Also in the second embodiment configured in this way,
By operating the hydraulic cylinder 40, the block 6 placed on the elevator plate 34 can be raised or lowered, and the block 6 can be attached to and detached from the block mounting portion 5, and the effect is exactly the same as that of the first embodiment. be able to.

In addition, the present invention is not limited to the embodiments described above or shown in the drawings; for example, the elevator plate 34 may be configured to be raised and lowered by an air cylinder, without departing from the scope of the invention. Various modifications are possible.

As is clear from the above description, the present invention allows the block to be removed from the block mounting part by operating the block lifting mechanism when replacing the mold.
The mold fixed to this block can be replaced in a wide area outside the frame, and the block with a new mold fixed to it can be lowered by the block lifting mechanism and attached to the block mounting part, and the block can be attached to the block mounting part. Therefore, unlike in the past, there is no need to replace the mold in a narrow space within the frame of the heading machine, making the replacement work easier, reducing the work time and saving labor. Moreover, the means for exchanging blocks can be constructed with a relatively simple mechanism consisting of a block lifting mechanism that performs simple lifting and lowering operations, a positioning member, and a block fixing mechanism, thereby avoiding complication of the configuration. Furthermore, since the mold exchange method involves removing the block from the block mounting part using the block lifting mechanism and replacing it with a new block, even when automating mold exchange (block exchange), it is difficult to replace the block that was conventionally considered. Unlike automatic mold changing equipment, which does not require highly precise and complex operations, it is a simple device that performs the simple operation of replacing blocks on a block lifting mechanism, making it possible to automate mold changing at low cost. can be achieved.

[Brief explanation of the drawing]

1 to 4 are for showing the first embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view of the main part, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. The figure is a partially cutaway side view, FIG. 4 is a longitudinal sectional side view of the main part, and FIG. 5 is a first embodiment showing a second embodiment of the present invention.
It is a figure equivalent figure. In the figure, 1 is a frame, 4 is a subframe, 5 is a block mounting part, 6 is a block, 7 is a mounting hole (mold fixing recess), 8 and 9 are first and second dies (molds), respectively. 10 is a collet, 13 is a chuck unit (block fixing mechanism), 16 is a clamp device (block fixing mechanism), 21 is a block lifting mechanism, 34 is a lifting plate, 36 is a protruding pin (positioning member), 39 is a block lifting mechanism, 40 is a hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] A block having a mold fixing recess for fixing a mold such as a die or punch in a predetermined position, and a block provided in the frame or ram of a heading machine and having the mold fixed in the mold fixing recess in advance. A block mounting part that is detachably mounted; a block lifting mechanism provided on the frame or ram for lifting or lowering the block on the block to take it in and out of the block mounting part; and a block lifting mechanism provided on the block mounting part. A heading machine comprising: a positioning member for positioning the block; and a block fixing mechanism provided on the frame or ram and fixing the block housed in the block mounting part by the block lifting mechanism.