JPS6023897B2 - Bolster upper limit position detection switch mounting position automatic adjustment device that responds to shut height adjustment - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is a press machine, particularly a press machine used for FB processing (precision punching), in which a position detection switch is used to set the upper limit position of a bolster in accordance with shirt height adjustment. Relating to an adjustment device.

Here, the shirt height is the stroke end (of the piston) of the main hydraulic sill for punching that allows the punch attached to the upper die to bite into the die attached to the lower die by 0.1 inch during the punching process. upper limit).

[Conventional technology]

In the attached drawings, reference numeral 1 denotes a main hydraulic cylinder for punching that is fixed to a machine frame body 2, and the hydraulic cylinder 1 includes a cylindrical body la and a cylinder body la that are substantially open at the upper end.
A piston lb and an elevating ram l that can be moved vertically inside
It is composed of c.

The upper part of the lifting ram LC is connected to the Bols Yu 3,
A lower mold 4 having a punch is attached to the upper surface of the bolster 3. Further, an upper table 5 is arranged above the bolster 3 at a distance, and an upper mold 6 facing the lower mold 4 and having a die is attached to the lower surface of the upper table 5. Note that the workpiece plate is attached to the lower surface of the upper mold 6. In addition, the cylinder body la has a shirt height setting ring 7 screwed onto its upper inner peripheral surface, and the bottom surface b of the shirt height setting ring 7 and the top surface a of the piston lb.
The distance between the two will determine the shirt height.

That is, when the piston lb rises, its upper surface a comes into contact with the lower surface b of the shirt height setting ring 7, and prevents it from rising any further. However, if the above-mentioned contact is left as it is, it will cause a considerable impact and cause damage to the device, so the upper limit of the bolster is detected to detect the upper limit of the drive of the main punching hydraulic cylinder 1 and stop the drive. A switch is provided. Furthermore, after punching several thousand times, the press machine wears out the surfaces of both molds and their thickness changes, so the shirt height also needs to be adjusted in accordance with the change in the thickness of the molds.

Such adjustment is performed by rotating the shirt height setting ring 7 screwed into the cylinder body la, and moving it up and down relatively within the cylinder body la due to the rotation.

The shirt height setting ring 7 is rotated by meshing a setting ring rotation pinion 9 rotated by a drive motor 8 with a wheel gear 7a provided on the outer peripheral surface of the shirt height setting ring 7.

Further, when adjusting the shirt height, it is also necessary to move up and down the bolster 3, that is, the bolster upper limit position detection switch that sets the upper limit of the main hydraulic cylinder.

[Problem that the invention seeks to solve]

However, in the past, this bolster upper limit position detection switch was moved manually, making the shirt height adjustment operation extremely cumbersome and inaccurate.

The present invention can solve these drawbacks of the prior art.

That is, by automatically moving the bolster upper limit position detection switch in conjunction with shirt height adjustment,
An object of the present invention is to provide an automatic adjustment device that can smoothly and reliably move a bolt upper limit position detection switch. [Means for Solving the Problems] Hereinafter, means for solving the above-mentioned problems will be specifically explained with reference to an embodiment shown in the attached drawings.

The basic configuration of the FB processing press machine equipped with the automatic position detection switch mounting position adjustment device according to the present invention is the same as the above-mentioned conventional FB processing press machine, and the configuration is as explained in the prior art section. Therefore, it will be omitted.

In the basic configuration of the press machine described above, the position detection switch mounting position automatic adjustment device, which is a feature of the present invention, is installed on the machine frame main body 2.
The enemy gear 10, which can be freely rotated on the top surface, is engaged with the wheel gear 7a of the shirt height setting ring 7, and the elevating spiral 11 is screwed into the cylindrical gear 10 in a penetrating state. The rotation of the lifting screw shaft 11 is restrained, and a switch mounting base 13 having a bolster upper limit position detection switch A is fixed to the upper part of the lifting screw shaft 11.
It is constructed by attaching a sensor 14 to one side of the body.

With this configuration, when the shirt height setting ring 7 is rotated by the drive motor 8 via the pinion 9 to change the shirt height position, the setting ring 7 is raised (or lowered) by the same rotation, and the lower surface of the setting ring 7 is rotated. The shirt height is set by moving b.

That is, as the shirt height setting ring 7 moves, the lower surface b of the ring 7 naturally moves, but at this time, the piston lb rises by supplying hydraulic oil into the oil chamber ld.

When rising, the upper surface a of the piston lb comes into contact with the lower surface b of the setting ring 7, making it impossible for the piston lb to rise any further, thereby setting the shirt height.

In this shirt height setting operation, the drive motor 8
The rotation is not only caused by the rotation of the shirt height setting ring 7, but also by the rotation of the cylindrical gear 10 via the pinion 9 and wheel gear 7a.
The vertical screw shaft 1 is also rotated by rotating the cylindrical gear 10.
At the same time, the bolster upper limit position detection switch A, which is integrated with the lifting screw 11, also rises.

In addition to the bolster upper limit position detection switch A, the switch mounting base 13 is equipped with a bolster lower limit position detection switch A to prevent collision between the cylinder bodies la and the cylinder bodies la.

Since the same layer detection switch does not require fine adjustment like the bolster upper limit detection switch A, it may be moved in the same way as the bolster upper limit detection switch A, as shown in the figure, or it may be fixed. Good too. [Effects of the Invention] As described above, the position detection switch mounting position automatic adjustment device according to the present invention automatically and easily moves the bolster upper limit position detection switch in conjunction with the shirt height adjustment operation to determine the position. be able to.

[Brief explanation of drawings]

The attached drawing is a schematic diagram of a press machine equipped with an automatic adjustment device for mounting position of a bolster upper limit position detection switch according to the present invention. In the figure, 1...Main hydraulic cylinder for punching, la
...Cylinder body, lb...Piston, lc...Elevating ram, 2...Machine frame body, 3
...Bolster, 4...Lower mold, 5...
...Top table, 6...Top mold, 7...
... Shirt height setting ring, 8... Drive motor, 7a... Wheel gear, 9...
Setting ring rotation pinion, 10...Cylindrical gear, 11...Elevating screw shaft, 13...Switch mounting base, 14...Sensor, A, ...Bolster upper limit position detection switch, hmm... Bolster lower limit position detection switch.

Claims (1)

[Claims] 1 The cylinder body 1a and the piston 1b are attached to the machine frame body 2.
A punching main cylinder 1 consisting of a lifting ram 1c and a lifting ram 1c is attached, a bolster 3 for placing a lower die 4 on the upper surface is attached on the lifting ram 1c, and an upper die is placed on the lower die 4 on the lower side. Further, a cylindrical shaft height setting ring 7 is rotatably screwed onto the inner peripheral surface of the cylinder body 1a, and the lower surface b of the shaft height setting ring 7 and the upper surface of the piston 1b are arranged. In a press machine that sets the shaft height by contacting with a shaft height setting ring 7, a wheel gear 7a is attached to a portion of the shaft height setting ring 7 that protrudes from the machine frame body 2, and is rotatably attached to the upper surface of the machine frame body 2. The cylindrical gear 10 is meshed with the wheel gear 7a, the elevating screw shaft 11 is inserted into the cylindrical gear 10, the rotation of the elevating screw shaft 11 is restrained by the key 12, and A bolster upper limit position detection switch A is installed at the top of the lifting screw shaft 11.
1. An automatic bolster upper limit position detection switch mounting position adjustment device responsive to shaft height adjustment, characterized in that a switch mounting base 13 having a height _1 is fixed, and a sensor 14 is further mounted on one side of a bolster 3.