JPS646000B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press machine with a C-shaped frame and a toggle mechanism as a slide drive device, which is suitable for cold forging.

Recently, processing by cold forging has been increasing, and this is because cold forging is superior to cutting processing in terms of productivity and material yield. Furthermore, there have been significant advances in cold forging processing methods and molds.
In the past, there is a tendency for products that could only be processed by cutting to be processed by cold forging.

By the way, since the C-frame press has an open machine front, it has good workability, and cold forging presses with C-frames are also being used frequently. Further, in a toggle press, the upper mold attached to the slide moves at a fast speed until it reaches the workpiece, and after entering the processing stroke, the speed is reduced and pressure forming is performed at a slow speed. In other words, the toggle press has a structure in which the rotation of the motor is decelerated, the crank mechanism changes this to reciprocating motion, and the toggle mechanism then gives linear reciprocating motion to the slide to perform compression processing. This type of press is suitable for forging because it can obtain a large pressing force near the dead center.

A forging press device using a toggle mechanism is already known, for example, as introduced in Japanese Utility Model Publication No. 54-38050.

The above invention has a frame with an open front, a toggle mechanism is provided above the slide that reciprocates between the crown part and the bed part, and a connecting rod is connected to the pivot parts of the upper and lower links that constitute the toggle. The connecting rod is connected to a crank mechanism.

The press equipment according to the prior art also has the feature of good workability because the front of the machine is open, but it is necessary to feed materials, take out products, etc. from the front of the machine.

Depending on the nature of the press work or the layout of the factory, work efficiency would be further improved if materials could be supplied and products taken out not only from the front of the machine, but also from the front and back of the machine. However, lubricating oil is constantly supplied to the drive device of the press machine, and the supplied oil falls below the device, so simply opening the rear of the press machine will cause the product to fall out when the product is taken out. Currently, there are problems such as staining with oil, and it is not possible to feed materials or take out products from the front and rear directions of the mold.

The present invention has been made in order to solve the above-mentioned problems of the prior art.A machine room is provided above the frame adjacent to the toggle mechanism, and a drive mechanism for driving the toggle is housed in the machine room. A space communicating with the mold is formed below the bottom wall forming the machine room.

This prevents the products from being contaminated by lubricating oil even when the materials supplied to the mold and the molded products are taken out not only from the front of the press machine but also from the front and rear directions. be able to.

Next, details of the present invention will be explained with reference to illustrated embodiments.

In FIGS. 1 and 2, a frame 1 has a C-shaped side surface, a bed portion 2 and a crown portion 3.
This is a type of press in which an opening is formed by. Further, hollow spacers 4, 4, which are slightly longer than the opening length, are press-fitted into the tips of the openings of the bed portion 2 and the crown portion 3.

In the press machine of the present invention, the slide (ram) is driven by a toggle mechanism. A bolster 5 is placed on the bed portion 2 of the frame 1, and a slide 6 is provided at a position facing the bolster 5 so as to be movable in the vertical direction supported by a guide provided on the frame. The mechanism for driving the slide 6 is a frame 1 corresponding to the rear of the slide.
It is housed in the machine room 7 of.

The machine room 7 is partitioned from other rooms by a wall surface, and a space 8 communicating with the mold is formed below the machine room 7. For this reason, a window hole 9 is provided at the rear of the mold between it and the space 8, allowing material to be supplied to the mold not only from the front of the press machine but also from the front and back directions, and to allow the product to be manufactured. It is now possible to take out the

The frame 1 has a drive shaft 1 that crosses the machine room 7.
A flywheel 11 provided on the drive shaft 10 is rotationally driven by a belt (not shown) connected to a drive motor 12. The drive shaft 10
A clutch/brake device 13 is interposed between the flywheel 11 and the flywheel 11, and this device is of a type operated by pressurized air supplied from an air supply mechanism.

Further, the frame 1 is provided with a rotation shaft 14 above the drive shaft 10 and parallel to the drive shaft 10,
Pinion 15 formed on drive shaft 10 and rotating shaft 14
The rotational force of the drive shaft 10 is transmitted to the rotation shaft 14 by meshing with a gear 16 provided in the drive shaft 10 .
Further, two eccentric plates 17, 17 are provided on the rotating shaft 14, located on both sides of the gear 16.
The base end portions of connecting rods 18, 18 projecting substantially horizontally from the machine room 7 and facing above the slide 6 are rotatably provided on the respective eccentric plates 17, 17.

Further, a support shaft 19 is fixed to the crown portion 3 of the frame 1 in a direction parallel to the rotation shaft 14,
An upper toggle link 20 is provided on the support shaft 19, and a lower toggle link 21 is provided on the slide 6 so as to be rotatable by a shaft 22. , the pivot 23 and connecting rods 18, 18 extending substantially horizontally from the machine room 7 are connected.
When the eccentric plates 17, 17 rotate due to the rotation of the rotating shaft 14, the connecting rods 18, 18 reciprocate in the length direction, and are composed of an upper toggle link 20 and a lower toggle link 21 connected to the connecting rods 18, 18. The slide 6 moves up and down due to the movement of the toggle mechanism.

A worm wheel 24 is mounted between the support shaft 19 and the upper toggle link 20, and an eccentric portion 25 formed integrally with the worm wheel 24 is connected to the upper toggle link 20. It is provided so as to be concentric with the support shaft 19. Then, the worm shaft 26 that is pivotally attached to the crown portion 3 is engaged with the worm wheel 24, and the worm shaft 26 is rotationally driven by the adjustment motor 27. The fulcrum position of the toggle link 20 is changed to change and adjust the bottom dead center position of the slide 6.

Referring to FIG. 3, balancers 28 for urging the slide 6 upward are provided on both sides of the slide 6, but only the balancer on the left side is shown in the drawing. In the balancer 28, a balancer rod 29 biased upward by a spring is housed in a hollow knockout rod 30 provided in the frame. It has a structure in which it is connected to 29.

Balancer rod 29 has knock out rod 30
They are ideally positioned relative to each other without interfering with the corresponding knockout bar 31, and also serve to prevent danger to the operator due to the balancer rod 29 that moves up and down with the slide.

Utilizing the fact that the spacer 4 provided in the above-mentioned frame opening is a hollow body, a load detection device is provided passing through the spacer. A detection rod 32 is provided passing through the frame 1 and the spacer 4, the lower end of the detection rod 32 is fixed to the frame, the upper end is a free end, and the tentacle of a load cell 33 is in contact with the free end. ing. The load meter 33 is designed to detect the displacement of the upper part of the frame with respect to the upper surface of the detection rod, that is, the elongation rate of the frame when the slide 6 receives a load.

In addition, a lower mold knockout device is incorporated in the press machine of the embodiment. A holder 34 is fixed to one end of the rotating shaft 14, and is fitted onto the rotating shaft 14, and a cam 35 is provided so that the mounting position of the cam 35 can be changed with respect to the holder 34. and cam 35
A lever 37 having a cam follower 36 corresponding to the cam follower 36 is rotatably provided at one end of the drive shaft 10, and the other end of the lever is a link 38 extending below the frame 1 with one end facing below the bed. It is attached to the shaft.

The base end of the link 38 is connected to an air cylinder 39 attached to the frame 1, and the distal end extends downward from the bed section 2 and is connected to an arm 40 rotatably provided on the frame 1. has been done.
Further, a knockout pin 42 that slides in the vertical direction is connected to another arm 41 provided coaxially with the arm 40 at the center of the bed.
As the mold rotates, the knockout pin 42 moves up and down with respect to the mold installed on the bolster 5 at the same timing to knock out the product.

In the embodiment configured as described above, the flywheel 11 is rotationally driven by the drive motor 12, and upon a signal to start press operation, the rotational force of the flywheel 11 is transferred to the pinion 15 and gears via the clutch/brake device 13. 16, the transmission is transmitted to the eccentric plates 17, 17, and the connecting rods 18, 18 are reciprocated by the action of the eccentric plates, and the connecting rods 18, 18 actuate the toggle consisting of the upper toggle link 20 and the lower toggle link 21 to slide. 6 is moved up and down.

Adjustment of the lower fulcrum position of the slide 6 is performed by an adjustment motor 27. The adjustment motor 27 rotates the worm shaft 26, the worm wheel 24, and the eccentric portion 25, displacing the fulcrum position of the upper toggle link 20, and the amount of vertical movement of this fulcrum position becomes the slide adjustment amount.

Pinion 15 and gear 16 built into machine room 7
Since the lubricating oil supplied to the space 8 is stored in the machine room, it does not fall into the space 8. Therefore, the material to the mold and the product after molding can be taken out not only from the front of the press machine, but also by using the space 8 formed below the machine room 7 and the window hole 9 at the rear of the mold. It can also be done from the front and back directions.

Also, the machine room 7 can be used as an oil bath,
In this case, it is possible to prevent the wear of the gears and also to prevent the generation of noise.

As explained above, the present invention provides a C-frame press in which the slide is driven by a toggle mechanism, in which the drive device is housed in a machine room provided above the frame, and the machine room is separated from other rooms to provide lubrication. Since the oil is prevented from falling downward, it is possible not only to feed materials and take out products from the front of the mold, which is a feature of the C-shaped frame, but also from the front and back directions of the press machine. Therefore, it has the effect of better workability compared to conventional equipment.

Furthermore, if the machine room is used as an oil bath, wear of gears and generation of noise can be prevented.

In addition, inspection of molds and other operations can be carried out in the space below the machine room, making setup easier.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of the C-shaped frame toggle press machine of the present invention, and Fig. 2 is a -
3 is a sectional view taken along the - line in FIG. 1, and FIG. 4 is a sectional view taken along the - line in FIG. 2. 1...Frame, 2...Bed part, 3...Crown part, 4...Spacer, 5...Bolster, 6...
...Slide, 7...Machine room, 8...Space section, 9...
... Window hole, 10 ... Drive shaft, 11 ... Flywheel, 12 ... Drive motor, 13 ... Clutch/brake device, 14 ... Rotating shaft, 15 ... Pinion, 16 ... Gear, 17 ... Eccentricity Plate, 18... Conn rod, 19... Support shaft, 20... Upper toggle link, 21... Lower toggle link, 22... Shaft,
23... Axis, 24... Worm foil, 25...
...Eccentric bushing, 26...Worm shaft, 27...
Adjustment motor.

Claims (1)

[Claims] 1 In a C-shaped frame press with an open front, a slide that reciprocates between the bed and crown of the frame is connected to a toggle mechanism provided between the frame and the crown, and the frame is A machine room is provided adjacent to the toggle, and a drive shaft with a flywheel, a rotating shaft, an eccentric plate, and a connecting rod are housed in the machine room,
The C-shaped frame toggle is characterized in that the cooking rod extends substantially horizontally from the machine room and is connected to the pivot of the toggle mechanism, and a space is formed below the machine room that communicates with the mold. press.