JPH0329036Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a die height fine adjustment device for a press machine.

The conventional die height fine adjustment device described above uses an electric or pneumatic drive motor installed in the slide to perform adjustment by mechanical means, but with this method, the die height changes while the press is in use. To avoid this problem, recent attempts have been made to reduce the variation in die height by controlling the temperature of the entire press machine. Heating and cooling devices are required. (2) Pre-operation is required to keep the temperature constant. (3) It is not possible to control changes in product accuracy due to factors other than the press machine itself, such as molds and materials. (4) If the press machine is stopped for some reason because heating or cooling takes time, the temperature distribution of the entire press machine changes, the die height changes, and there are problems such as the need for pre-operation. .

The present invention was developed with the above in mind, and is a die height fine adjustment device that can reliably finely adjust the die height by the required amount without heating, cooling, or pre-operation. This is what we are trying to provide.

Embodiments of the present invention will be described below based on the drawings.

In the figure, 1 is a frame of a press machine, and this frame 1 is composed of a bed 2, a crown 3, and an upright 4 that vertically connects these. 5 is a slide that moves up and down along the upright 4;
The slide 5 is connected via a plunger 6 to a drive source provided within the crown 3.

The connection between the slide 5 and the plunger 6 is as shown in FIG. 8 are fixed concentrically. The worm wheel 8 is rotatably engaged with the slide 5 in the vertical direction and is installed inside the slide 5. Further, a worm 9 that meshes with the worm wheel 8 is installed inside the slide 5. And the axis 10 of this worm 9
First and second ratchet wheels 11 and 12, each having a scalene chevron shape and having a number of pawls with one side as a locking surface, are fixed concentrically with the locking surfaces facing in opposite directions. It has been done. 13 and 14 are the respective ratchet wheels 11 and 1 mentioned above.
These are first and second cylinder devices in which piston rods 15 and 16 are provided facing each other on the locking surfaces of the two claws, and the rod chambers and bottom chambers of each cylinder device 13 and 14 are the first and second cylinder devices. It is connected to a fluid pressure source 19 such as a reservoir via solenoid valves 17 and 18 .

For example, if the first solenoid valve 17
When turned on, pressure fluid is supplied to the bottom side of the first cylinder device 13, the piston rod 15 is extended, and the first ratchet wheel 11 is rotated counterclockwise. The adjusting screw 7 is rotated in the screwing direction, the slide 5 moves upward, and the die height is adjusted in the upward movement direction.

On the other hand, when the second solenoid valve 18 is turned ON, the piston rod 16 of the second cylinder device 14 moves to extend, and the second ratchet wheel 12 is rotated clockwise. is rotated in the drawing direction, the slide 5 moves downward, and the die height is adjusted in the downward movement direction.

The first and second solenoid valves 17 and 18 are the third
As an example shown in the figure, a bottom dead center detector 20 that detects the bottom dead center of the slide 5, and a product accuracy detector 21
The reference value comparator 23 compares the respective values of the press load detector 22 and the press load detector 22, and is operated based on the magnitude of the values. It's getting old.

In adjusting the die height, the die height is adjusted by applying a constant adjustment torque and utilizing the unloaded state of the adjustment screw 7, which occurs when the lifting force of the balancer, the acceleration due to the vertical movement of the slide, and the weight of the slide are balanced. Make adjustments.

The present invention is as described above. Based on the detected values such as changes in the bottom dead center accuracy of the press, changes in the forming accuracy of the product, and changes in the load of the press, the required amount is determined by the ratchet wheel provided in the die height adjustment part. Only the die height can be adjusted reliably. The die height adjustment described above can be carried out without controlling the temperature of the entire press machine or performing preliminary operation.

[Brief explanation of drawings]

Figure 1 is a front view of a press machine to which the present invention is applied, Figure 2 is an explanatory diagram of the configuration of the main parts of the present invention,
FIG. 3 is a block diagram. 1 is the frame body, 5 is the slide, 6 is the plunger, 7
is an adjustment screw, 8 is a worm wheel, 9 is a worm, 11 and 12 are ratchet wheels, 13 and 14 are cylinder devices, and 17 and 18 are solenoid valves.

Claims (1)

[Scope of utility model registration request] A slide 5 is connected via an adjustment screw 7 to a plunger 6 that is connected to a drive source provided at the top of the frame 1 and operates in the vertical direction, and by rotating the adjustment screw 7, the slide 5 is moved relative to the plunger 6. In the die height fine adjustment device for a press machine, which adjusts the position of a press machine, a worm wheel 8 in which a worm 9 meshes with the adjusting screw 7 is fixed concentrically to the adjusting screw 7, and a shaft of the worm 9 that meshes with the worm wheel 8, Two ratchet wheels 11 and 12 each having a scalene chevron shape and having a large number of pawls with one side as a locking surface are fixed with the locking surfaces of the respective pawls facing in opposite directions. , 12, the piston rods 15, 1 of the cylinder devices 13, 14 are attached to the locking surfaces of the claws of the cylinders 13, 14.
A die height fine adjustment device for a press machine, characterized in that the tips of the cylinder devices 13 and 14 are opposed to each other in the direction of extension thereof, and the cylinder chambers of the cylinder devices 13 and 14 are connected to a fluid pressure source via solenoid valves 17 and 18, respectively.