JPH0328982Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a multi-stage former that sequentially presses and forms metal products such as bolts, nuts, or various metal parts using punches and dies arranged in multiple stages. In particular, if the die mold required for this homer is worn out or damaged, the die mold is automatically replaced with a new one in the mold case while the die mold is still in the mold case, and if necessary, the die mold This invention relates to a mold auto-locking mechanism in a molding machine that allows automatic replacement of molds.

(Prior art and problems) Continuous multi-stage formers are usually equipped with 3 to 5 stages of punches and dies, as well as a cutting device and a guide device for feeding the material, and the punches and dies are particularly susceptible to wear and tear. These molds must be replaced with new ones each time, and replacing them takes a lot of effort and time, which seriously impedes continuous work and is a major cause of reduced production efficiency. It's summery.

Therefore, recently, so-called robot systems have been developed that automatically remove and replace damaged molds, as seen in Utility Model Application Publication No. 59-10942, etc. However, with conventional equipment, only one mold can be replaced. Since the molds are removed and replaced one by one, if the molds themselves are strongly stuck to the die block or punch case, making it difficult to remove them, there is a problem that automatic replacement cannot be performed if even one mold is seized. It was hot.

(Technical Issue) Therefore, in the present invention, even if the mold is seized and cannot be removed, the entire mold can be easily and reliably replaced automatically using a robot system, and if necessary, The technical challenge is to enable automatic replacement of only the die mold.

(Technical means for solving the problem) In order to solve the above-mentioned technical problem, the mold auto-locking mechanism in the homer of the present invention allows the die mold 1 to be pulled out only upward while it is attached to the main body frame 3. A fitting part 9 for fitting the mold case 2 is provided, and a lock pin 6 that moves forward and backward so as to protrude through the main body frame 3 is provided in the mold case fitting part 9 of the main body frame 3.
The lock pin has a spring 10 in its rear portion that is biased to press the lock pin 6 forward when it is free, a cam block 5 that pushes the lock pin 6 rearward by the interruption of a cam, and a power that operates this cam block. A cylinder 4 is provided, and a lock hook 8 is provided at the front end of the lock pin 6 for locking the mold case 2 to the main body frame 3. It is provided so that it can be connected to and removed from the die mold by rotation.

(effect) The above technical means works as follows.

FIG. 3 shows the die side of the heading section of the multi-stage former, and the operation will be explained below when the die is replaced.

The dice 1 are set so that each die block can be removed from the main body frame 3 while attached to the die block 2, and FIG. 3 shows the die in the locked state.

In the same figure, when the power cylinder 4 is operated downward and the cam block 5 is pulled down, an interrupting force acts, and the engaging body 7 fixed to the lock pin 6 engages with the cam block and is pushed backward (arrow A). Therefore, the lock pin 6 moves in the same direction, and this causes the die lock 2 to be attached to the main body frame 3 via the lock hook 8.
Since the die block 2 is strongly pressed against the rear wall surface 9a within the fitting portion 9, the die block 2 becomes integral with the main body frame 3.

When the power cylinder 4 is next operated upward to move the cam block upward from this locked state, the cam block 5 becomes free with respect to the engaging body 7, so the pressing force of the spring 10 reversely pushes the lock pin 6 through the engaging body 7. The die block 2 is pushed forward (in the direction of arrow B), and the pressing force thus far disappears, so that the die block 2 becomes free relative to the main body frame 3.

Therefore, if this unlocked die block 2 is lifted upward by a robot device and removed from the fitting part 9, then a new die-equipped die block is fitted and locked again, all of the plurality of dies are removed. are exchanged all at once.

If you want to remove only the die 1 and replace it, drive the motor 22 shown in Figure 2 to move the rack 11, and the pinion 8a that meshes with it will engage the lock hook 8.
When the die 1 is rotated at the same time and disengaged from the engaging portion 1a of the die 1, the front end of the die 1 is grasped by the claw 12 of the robot and pulled out forward. Only one can be pulled out and replaced with a new one.

(Effects) As described above, the present invention provides a fitting part 9 that fits the mold case 2 so that the die mold 1 can be pulled out only upwards while the die mold 1 is attached to the main body frame 3. A lock pin 6 that protrudes through the main body frame 3 and moves forward and backward is provided in the mold case fitting part 9, and a lock pin 6 is attached to the rear part so as to press the lock pin 6 forward when it is free. A cam block 5 that pushes the lock pin 6 backward by the biased spring 10 and a cam interruption, and a power cylinder 4 that operates this cam block are provided. A lock hook 8 for locking is provided, and the lock hook 8 is provided so that it can be engaged with and detached from the die mold by interlocking rotation of the rack 11 and pinion 8a from the drive device 22. It is possible to replace the entire mold case at once without taking out the molds one by one while keeping them all in the mold case. Therefore, it is easy to deal with cases where the die mold is stuck and cannot be removed, and it is easy to use with a robot system. automatic operation is easily possible. Further, locking and unlocking of the mold case with respect to the main body frame can be easily and quickly performed with one touch by operating the power cylinder. Furthermore, when the lock is locked, the wedge-shaped cam block acts as a pedestal, preventing the power cylinder from being cushioned when a load is applied, thereby increasing the support force of the lock pin without affecting the power cylinder. can be strongly and reliably held in the locked state. Further, the present invention allows only the die mold to be unlocked and removed while the mold case is fixed to the main body frame, and can be replaced as desired, and the structure is simple and easy to implement.

(Example) The attached illustrated example shows a case where the present invention is implemented on the die side of a forging part.

A plurality of die fitting openings 2a are provided in the die block 2 at intervals in a horizontal row, and the die 1 is fitted into each of the openings 2a so as to be inserted and removed from the front.

The power cylinder 4 uses a hydraulic cylinder, an air cylinder, etc., and is attached to the rear part of the main body frame 3 with a bracket 13, and its upper end is connected to the cam block 5 so that the piston rod 4a can extend and contract upward.

The cam block 5 is wedge-shaped with a tapered surface 5a that widens upward, and when the cam block 5 is moved up and down while facing the tapered surface 14a of the fixed contact plate 14 in sliding contact, the engaging body 7 that engages at the rear part moves in the axial direction. can be moved forward and backward.

The engaging body 7 is attached to the lock pin 6 by screwing so that its attachment position relative to the lock pin can be adjusted.

The spring 10 is housed in the bracket 15 so as to be supported by the engaging body 7 and the end plate 15a.

A knockout device 16 is built into the main body frame 3, and a rear pin 18 is inserted from the rear with a hammer 17.
When the die 1 is struck, the knockout pin 20 in the die 1 is interlocked so as to protrude from the die hole 1b via the intermediate pin 19.

Also, a lubricating oil passage 1c is provided in the die 1, but its communication port is connected to the supply passage 21 on the main body frame side.
It is designed to match when set.

Figures 1 to 4 show an embodiment in which it is possible to lock the die block 2 and the die 1 with the lock hook 8.
A rack 11 is provided at the bottom of the fitting part 9 so as to be able to reciprocate in a direction perpendicular to the axis. When the notch 8b corresponds to the die 1, the lock is released, and when the other part 8c corresponds, it engages with the die 1 and removes the die 1. It locks down uncontrollably.

Further, the present invention can be applied to any type of die, from a single die to a die in multiple rows.

[Brief explanation of the drawing]

Fig. 1 is an overall plan view of a multi-stage former showing the first embodiment of the present invention, Fig. 2 is an enlarged front view of the die block side, Fig. 3 is a longitudinal sectional side view of the same, and Fig. 4 is a view of the cylinder section seen from the rear. It is a front view. DESCRIPTION OF SYMBOLS 1... Mold (dice), 2... Mold case (die block), 3... Body frame, 4... Power cylinder, 5... Cam block, 6... Lock pin, 7... Engaging body, 8... Lock hook, 9...Mating part, 10...Spring, 11...Rack, 8a...
pinion.

Claims (1)

[Scope of utility model registration request] The body frame 3 is provided with a fitting part 9 into which the die case 2 is fitted so that the die mold 1 can be pulled out only upwardly while the die die 1 is attached. A lock pin 6 is provided which moves forward and backward so as to protrude through the lock pin, and a spring 10 is provided at the rear of the lock pin, which is biased to press the lock pin 6 forward when it is free, and a cam interrupts the lock pin. A lock hook 8 is provided at the front end of the lock pin 6 to lock the mold case 2 to the main body frame 3.
The lock hook 8 is connected to a drive device 22.
A mold auto-locking mechanism for a home machine, characterized in that the mold auto-locking mechanism is provided so that it can be engaged with and detached from a die mold by interlocking rotation of a rack 11 and a pinion 8a.