JPH0686036B2 - Press machine parallelism measurement device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a press machine in which a slide faces a bolster and moves up and down, and a press machine for measuring parallelism between the slide and the bolster. The present invention relates to a parallelism measuring device.

[Problems to be solved by conventional technology and invention]

As a method of measuring such parallelism, there is a method of measuring the distance between the four corners by interposing a dial gauge that expands and contracts between them to obtain the parallelism. Adjusting the slide height also takes time. Therefore, a method is known in which a proximity switch is installed between the bolster and the slide to display the parallelism at the bottom dead center digitally. I had to make adjustments. In addition, the placement of the proximity switch may be an obstacle when loading the mold.

Therefore, an object of the present invention is to provide a parallelism measuring device for a press machine that automatically measures parallelism between slides and bolsters with a simple structure without interposing a device between the slides and bolsters.

[Means for solving problems]

In order to achieve this object, the present invention provides linear scales 3 for detecting the movement amount of the slide 1 between the four corners of the slide 1 and the plunger 2 as shown in FIG. At the position, the distance Arf of one corner A that is the reference between the slide 1 and the bolster 4 and the distances Ai of the remaining three corners B (only one place is shown) are arranged, and the detection data Crf of one corner A of the linear scale 3 that is detected in advance and Memory means for storing each detection data Ci of three corners B, detection data Brf of one corner A of the linear scale 3 detected at a designated slide position at the time of measurement, each detection data Bi of three corners, and stored distances Arf, Ai and detection. Based on the data Crf, the distance between slide 1 and bolster 4 at one corner A and three corners B at the specified slide position Yrf, Yi and the distance difference between the three corners with respect to one corner A are flattened. The calculation means is provided with a calculation means for calculating the row degree Xi by a predetermined calculation expression, and a display means for displaying the calculated distances Yrf, Yi of the four corners A and B and the parallelism Xi of the three corners B in distance units. , Yrf = Arf + f (Crf) -f (Brf) (1) Yi = Ai + f (Ci) -f (Bi) ... (2) Xi = (Ai-Arf) -f {(Bi- Brf)-(Ci-Crf)} ...
(3) (f: a function that converts the detection data into a unit of distance).

[Action]

Focusing on the fact that the distances Li and Lrf between the plunger and the bolster 4 are constant, Yrf = Lrf-f (Brf) and Yi = Li-f (Bi). Also, Lrf = Arf + f (Crf) and Li = Ai + f (Ci),
Equations (1) and (2) are obtained.

Substituting equations (1) and (2) into Xi = Yi-Yrf, equation (3)
Is obtained. That is, Arf, Ai, Crf, Ci are calculated and stored in the memory means at the time of preliminary setting, and then Br is calculated by the calculating means.
Yrf, each Yi, and each Xi are indirectly measured only by detecting f and Bi. The distances Yrf and Yi at the four corners, that is, the die heights at the four corners and the parallelisms Xi at the three corners with respect to one reference corner are displayed on the display unit in units of distance.

Example of Invention

2 and 3 show a parallelism measuring device for a press machine according to an embodiment of the present invention.

In FIG. 2, an inner slide 11 and an outer slide
1 shows a double-acting press machine equipped with 12, these slides being driven by a link mechanism (not shown) which connects via a clutch 15 to a flywheel 14 which is rotated by a motor 13. At the time of pressing, the outer slide 12 is supported by the adjusting screws 162a to 162d at the four corners and descends in front of the inner slide 11 while facing the bolster 17.

Although such a configuration itself is well known, linear scales 20a to 20d for detecting the moving position of the outer slide 12 are provided at the four corners of the upper surface of the outer slide 12 according to the present invention. That is, these linear scales are attached to position-fixed plungers 16a to 16d, and racks 21a to 21d installed vertically in the vertical direction with respect to the bolster 17, pinions 22a to 22d meshed with these racks, respectively. Shaft 23
The rotary encoders 24a to 24d are rotated by a to 23d and are mounted on bases 12a to 12d provided on the outer slide 12 to generate absolute position signals. Then, when the relative distance between the outer slide 12 and the plungers 16a to 16d changes, the pinions 22a to 22d move to the plungers 16a to 1d.
By moving on the racks 21a-21d in conjunction with 6d,
The rotary encoders 24a to 24d generate absolute position signals corresponding to the movement amount.

FIG. 3 shows a circuit portion attached to the above-mentioned linear scales 20a to 20d, and 25 is a microcomputer which constitutes the memory means and the arithmetic means of the present invention.
Distance (die height) between the outer slide 12 and the bolster 17 in the portions 16a to 16d Yrf, Yia to Yid and the parallelism Xib, Xic, Xid based on the outer slide 12 in the plunger 16a portion
Is calculated. Reference numerals 26a to 26d are indicators of parallelism of each of these parts, 27a to 27d are indicators of die height of each part, and 28 is a data setting portion when a reference die height is set, which is a keyboard with an indicator.

The microcomputer 25 uses the CPU 25a based on the data at the time of setting the reference die height stored in the nonvolatile memory 25b.
On the other hand, according to the equation (3), the above parallelism and the equation (1)
And the above-described die height calculation processing is performed according to the equation (2). A crank angle signal generator is attached to the crank. When setting the reference die height, set the crank angle relative to the slide position to 180 ° (bottom dead center), and adjust the adjusting screws 162a to 162d while measuring the distance between the slide bottom surface and the bolster top surface with a dial ledge. Then, set the parallelism Xi at three points within the allowable range.

In this state, the reference die height Arf of the plunger 16a and the reference die heights Aib to A of the outer plungers 16b to 16d, respectively.
The id is set in the data setting unit 28, and the microcomputer 25
It is stored in the nonvolatile memory 25b. Further, the detection data Crf of the rotary encoder 14a at this point and the detection data Cib to Cid of the other rotary encoders 14b to 14d, respectively.
Is similarly stored in the non-volatile memory 25b.

After that, the data Arf held in the nonvolatile memory 25b,
Turn on the power when necessary based on Aib ~ Aid, Crf, Cib ~ Cid to perform measurement. That is, every time the crank angle reaches 180 ° while the press machine is operating, the designated crank angle signal is supplied to the microcomputer 25, at which point the detection data Brf, Bib-Bid of the rotary encoders 14a-14d are transferred to the microcomputer 25. CPU25a is taken into equation (1)
According to (3), the parallelisms Xib to Xid and the respective die heights Yrf and Yia to Yid are calculated, and the associated indicators 27a to 27d and 2 are displayed.
Display on 6a to 26d.

In the above-described embodiment, the specified crank angle is generated at a plurality of positions and the corresponding plurality of data are stored in the non-volatile memory 25b, whereby the parallelism at a plurality of crank angle positions can be measured. Further, data corresponding to a plurality of types of molds may be stored in the non-volatile memory 25b, and data representing the molds used during measurement may be loaded into the microcomputer 25 for selective processing. it can. The linear scale may be composed of a magnet scale main body attached to the plunger and a head attached to the upper surface of the slide.

〔The invention's effect〕

As described above, according to the present invention, by providing the linear scales respectively between the four corners of the slide and the plunger, the parallelism with respect to the bolster in the entire slide can be indirectly measured without interposing a device that becomes an obstacle between the slide and the bolster. Becomes The parallelism is displayed as the distance difference between the three corners with respect to one reference corner, and the parallelism can be easily confirmed. At that time, since the die heights at the four corners are also displayed, the overall displacement with respect to the bolster can be confirmed.

[Brief description of drawings]

FIG. 1 is a diagram for explaining the principle of the present invention, and FIG. 2 (a) is a schematic plan view of a parallelism measuring device according to an embodiment of the present invention.
FIG. 2 (b) is a partial front view thereof, FIG. 2 (c) is a partial side view thereof, and FIG. 3 is a diagram showing a configuration of a circuit portion of the device according to FIG. 1 …… Slide, 2 …… Plunger 3, 20a ～ 20d …… Linear scale, 4,17 …… Bolster, 12 …… Outer slide, 16a ～ 16d …… Plunger.

Claims (1)

[Claims] 1. A parallelism measuring device for a press machine, wherein a slide supported by a plunger moves up and down facing a bolster, the movement of the slide between the four corners of the slide and the plunger. A linear scale for detecting the quantity is provided respectively, and a distance of one corner serving as a reference between the slide and the bolster measured in advance at a designated slide position at the time of preliminary setting.
Arf and each distance Ai of the remaining three corners, a memory means for storing the detection data Crf of the one corner of the linear scale previously detected and the detection data Ci of each of the three corners, and the linear scale detected at the designated slide position during measurement. The detection data Brf of the one corner and each detection data Bi of the three corners and the stored distance Arf, Ai and the detection data Crf on the basis of the one corner and the three corners of the slide at the specified slide position-the bolster distance Yrf, Yi and a calculation means for calculating each distance difference of the three corners with respect to the one corner as parallelism Xi by a predetermined calculation expression, and the calculated distances Yrf of the four corners Yrf and Yi and parallelism Xi of the three corners in units of distance. And a display means for performing the calculation, wherein the calculation formula is Yrf = Arf + f (Crf) -f (Brf) Yi = Ai + f (Ci) -f (Bi) Xi = (Ai-Arf) -f {(Bi-Brf)- (Ci-Crf) (F: function that converts the detection data to the units of the distance)
A parallelism measuring device for a press machine.