JPH105871A - Shape straightening equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a straightening equipment which does not affect any parts other than the part to be straightened. SOLUTION: A shape straightening equipment is provided with a fixing jig 27 having a strip-shaped end face and a straightening jig 30 having a strip- shaped end face. While a sheet metal part 22 of a work 21 is held by the fixing jig 27, a lower straightening jig 32 is driven by a driving device 33, an upper straightening jig 31 is driven by a press 35, and the metal sheet part 22 is held and straightened by the straightening jig 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straightening device for correcting a shape of a work including a sheet metal portion made of a plastically deformable material such as a steel plate into a desired shape.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a block diagram schematically showing a conventional straightening device shown in Japanese Patent Publication No. 7-107, in which 1 is a long material as a work to be corrected, 2 and 3 are conveying rollers for conveying the long material 1, 4
Is a measuring device for measuring the shape of the long material 1, and 5 is a three-point press device, which comprises press heads 5a, 5b and 5c. Reference numeral 6 denotes a moving amount measuring device for detecting the amount of pressing by the press device 5 and the amount of correction of the long material 1, 7 a rollover device for reversing the long material 1, 8 a control device for controlling each unit, and an input / output unit 9. , An arithmetic unit 10, and a storage unit 11.

Next, the operation will be described. The shape of the long material 1 is measured by the measuring device 4. Based on the measured shape data, the controller 8 calculates the correction amount of the portion requiring correction, and calculates the pressing amount of the press device 5 from a prepared correction curve (correction amount versus pressing amount). . The long material 1 is supported by the press heads 5b and 5c, and the intermediate press head 5a is pushed into the straightening position of the long material 1 to correct the bending. Since the probe 6a of the movement amount measuring device 6 is urged toward the press head 5a and is in contact with the press head 5a, the pushing amount of the press head 5a is detected by the movement amount measuring device 6. You. Then, similarly, the amount actually corrected by the movement amount measuring device 6 is measured. Based on the pushing amount and the correction amount, the correction curve is corrected by moving in parallel.

[0004]

In the above-described conventional shape correcting device, since a three-point press device is used, a portion other than the portion to be corrected is deformed, and the accuracy of the portion is deteriorated. . For example, as shown in FIG. 11, as a result of pressing the shape before correction by the press head 7 a to correct the distortion inside the press heads 7 b and 7 c,
As shown in (b), displacement may occur outside the press heads 7b and 7c. Furthermore, regarding the correction when the component is assembled to the material to be corrected, it is difficult with the above-described conventional technology, and even if the correction is performed by any method, the overall accuracy including the component is the same as that of the material to be corrected and the component. Therefore, it is necessary to consider the accumulation of the respective variations, and therefore it is necessary to strictly control the accuracy of each. Further, when it is desired to correct the inclination including the inclination of a certain surface with respect to the reference surface, the correction cannot be performed by the above-described conventional technology.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to obtain a shape correcting device which does not affect a portion other than a portion to be corrected. Furthermore, it is possible to obtain a shape correction device that can correct a component in a state where the components are assembled to a sheet metal portion, and can obtain the entire accuracy without correcting the accuracy of the individual portions, and can correct the inclination of the surface. With the goal.

[0006]

According to the present invention, there is provided a shape correcting device comprising: a measuring device for measuring a size of a work; and a pair of devices having a band-shaped end surface, which surround a portion to be corrected and hold a sheet metal portion of the work. A correction jig, a pair of fixing jigs having a band-shaped end face, surrounding the correction jig and holding and fixing the sheet metal portion of the work, and a driving device for driving one of the correction jigs,
The apparatus includes a pressing device that drives the other of the correction jigs in accordance with one displacement of the correction jig, and a control device that controls the driving device. Further, the work is made up of a sheet-metal part and a component part assembled thereto, and the dimensions are measured by a measuring device at the part where the component parts are assembled, and correction is performed.

Further, the measuring device can measure three dimensions, and the driving device has three driving portions which can operate independently. Further, the control device corrects and uses the stored correction curve based on the result of the past correction work. Further, the measurement is performed by the measuring device in a state where the work is at a position fixed by the fixing jig. In addition, the component is movable, and a driving unit for driving the component is provided.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a schematic cross-sectional view showing a shape correction device according to a first embodiment of the present invention. In the figure, reference numeral 21 denotes a work to be corrected, which is made of a plastically deformable metal plate such as a steel plate. And a component part 23 attached thereto. 24
Is a measuring device for measuring the dimension of the workpiece 21 with the tip abutting on the workpiece 21, and a reference point measuring unit 2 for measuring a reference portion.
5 and a target point measuring unit 26 for measuring a correction target portion, and can be moved up and down in the figure. Although the reference point measurement unit 25 and the target point measurement unit 26 are illustrated as being provided two each, the illustration is partially omitted and, as described later, actually three units are provided. Therefore, it measures three places at a time.

Reference numeral 27 denotes a fixing jig for holding and fixing the work 21, comprising an upper fixing jig 28 and a lower fixing jig 29.
These tips have a width V, and extend in the depth direction in the figure to form strip-shaped end faces. Reference numeral 30 denotes a correction jig for holding and correcting the work 21, and includes an upper correction jig 31 and a lower correction jig 32, each of which has a width W,
In the figure, it extends in the depth direction to form a band-shaped end surface.

Reference numeral 33 denotes a driving device which drives the lower correction jig 32 to apply a displacement thereto, and comprises three driving portions 34 which can operate independently of each other, and a line connecting them forms a regular triangle. Are arranged as follows. Reference numeral 35 denotes a press device for driving the upper correction jig 31. The press device 35 includes three press portions 36 that can operate independently of each other, and is similarly arranged in a regular triangular shape. Reference numeral 37 denotes a support pin for supporting and raising and lowering the work 21. Although two pins are shown in the figure, three or more pins are actually provided. Reference numeral 38 denotes a loader that carries the work 21 to the correction device and carries it out.

FIG. 2 shows the measuring points and the fixing jig 27 and the correcting jig 30 by the measuring device 24 in the shape correcting apparatus shown in FIG.
FIG. 4 is a schematic plan view showing a holding portion by reference numeral 41. Reference measurement points 41 are provided at three positions on the sheet-metal portion 22 of the work 21 by the reference point measurement unit 25, and serve as references for achieving dimensional accuracy. Thus, the line connecting these three points is almost a regular triangle. Reference numeral 42 denotes a target measurement point by the target point measurement unit 26, which is located at three locations on the component 23, and a line connecting these three points is also substantially a regular triangle.

Reference numeral 43 denotes a portion in which the end surfaces of the upper correction jig 31 and the lower correction jig 32 which are arranged so as to surround the component part 23 face each other, and form a belt-like ring having a width W. The sheet metal-like portion 22 of the work 21 is held between these portions. Reference numeral 44 denotes a portion where the end faces of the upper fixing jig 28 and the lower fixing jig 29 arranged so as to surround the correction jig 30 are opposed to each other, and have a band shape of a width V and an annular shape. This portion clamps the sheet metal portion 22 of the work 21. The facing portions 43 and 44 are formed in an annular shape, but are not necessarily required. For example, the facing portions 43 and 44 may be formed in a rectangular shape, or may be formed in a partially interrupted shape in order to avoid interference with other portions.

FIG. 3 is a block diagram showing the structure of the control unit.
3, a control device for controlling the press device 35; 52, a signal from the measuring device 24; and a drive device 33, an input / output device for sending a signal to the press device 35; 53, a correction amount calculation; An arithmetic unit for issuing an instruction, 54 is a measuring device 24
The control unit 51 is a storage device for storing measurement values obtained by the following and a correction curve described below.
And a storage device 54. FIG. 4 shows the correction curve 5
6 is a graph showing a relationship between a residual strain of the work and a correction amount y with respect to a forced displacement x applied to the work by the straightening device. It is determined in advance by an experiment and stored in the storage device 54.

Next, the operation will be described. With reference to the reference measurement point 41 of FIG. 2, the dimensions of the target measurement point 42 are inspected,
It shall be corrected so as to be within a predetermined accuracy. FIG. 5 is a flowchart showing the flow of the correction process. First, in step 1, the loader 38 attaches the work 21 to the upper fixture 28.
And the lower fixing jig 29. In step 2, the work 21 is lifted by the support pin 37 as shown in FIG.
The measurement is performed by the measuring device 24. The measurement is performed for the reference measurement point 41 and the target measurement point shown in FIG. Since both are measured at three points, it is possible to inspect even the inclination of the plane by calculating each plane. In addition, 4
More than points may be measured, in which case the plane can be uniquely determined by the least squares method or the like.

In step 3, if the measured value obtained by the measurement in step 2 is within a predetermined range, it is determined to be non-defective and the process proceeds to step 4. If the measured value is out of the range, it is defective (correction required). And proceed to step 5. In step 4, the support pin 37 is lowered to place the work 21 on the loader 38, and the work 21 is carried out of the straightening device by the loader 38. In step 5, the support pin 37 is lowered to
On the lower fixing jig 29. Then, the correction amount is calculated. The input of the operation is the measured value obtained in step 2,
The amount of deviation of this measured value from the target value is the correction amount (correction target value A) to be corrected by the correction device. From the correction target value A, the amount of forced displacement x1 to be applied to the portion of the workpiece 21 to be corrected is obtained using the correction curve 56 in FIG. Step 9 in the previous correction process (will be described later)
Using the correction coefficient obtained in (1. This time is the first time, H1 =
1), the amount of forced displacement x actually applied to the work 21
2 is obtained as x2 = H1 · x1.

Next, correction is performed as shown in FIG. In step 6, the upper fixing jig 28 is lowered, and the sheet metal portion 22 of the work 21 is sandwiched and fixed between the upper fixing jig 28 and the lower fixing jig 29. In step 7, first, the driving device 33 is driven to lightly bring the lower correction jig 32 into contact with the workpiece 21, and then the driving device 33 is driven by the forced displacement amount x2 calculated in step 5, thereby obtaining the lower forcing jig. A forced displacement is applied to the sheet-metal portion 22 of the work 21 via 32. Further, the press device 36 is operated to drive the upper correction jig 31, and the upper correction jig 31 and the lower correction jig 32 use the sheet metal portion 22 of the work 21.
Sandwich. The holding position (height) is determined by the position of the lower correction jig 32 driven by the driving device 33, and the press device 35 only lowers the upper correction jig 31 in accordance with the position of the lower correction jig 32. .

After the forcible displacement is applied to the work 21 for a certain period of time in this way, the press device 35 is raised, and the drive device 33 is returned to the origin to release the forcible displacement of the work 21. Next, the upper fixing jig 27 is raised, and the work 21 is released. Here, the band-shaped end face having the width V is held, and the sheet metal portion 22 is sandwiched between the lower fixing jigs 28 and 29, and the band-shaped end face having the width W is held and the lower correction jigs 31 and 32 are used. Since the sheet metal-like portion 22 is pinched and corrected,
The outside of the fixing jig 27 is not affected by the correction. Such an effect occurs regardless of the presence or absence of the component 22. In this embodiment, since the drive unit 33 includes three drive units 34 that can operate independently, the inclination of the plane of the correction target unit can be corrected. Drive unit 34
Although the press device 35 also has three press portions 36 to cope with the movement of, the number of the press portions may be one so that the universal joint can be used to cope with the inclination of the surface.

Next, in step 8, the work 21 after the correction is measured. This measuring method is the same as that described in step 2. In step 9, the correction target value A obtained in step 3 is compared with the correction amount (a2-a1) actually corrected, and the correction coefficient is changed as follows.
Here, a1 is a measured value before correction, and a2 is a measured value after correction. H2 = H1 · A / (a2-a1) is calculated, and H2 is used instead of H1 in the next correction step. By doing so, a correction value closer to the correction target value A is obtained, and the work becomes more efficient and more accurate. When step 9 ends, the process returns to step 3 to execute the subsequent flow.

As described above, the correction target value A of the correction target portion
, And the correction is performed directly, so that it is not necessary to accumulate the variation of the individual portions, and therefore the accuracy of the individual portions does not have to be strict. In the above,
In the figure, the case where the correction is performed upward is shown. However, when the correction is performed downward, the lower correction jig 32 is lowered and positioned, and the upper correction jig 31 is lowered by the press device 35 so that the upper and lower correction jigs are moved upward and downward. The sheet metal portion 22 of the work 21 is clamped by the correction jigs 31 and 32 to perform correction.

Embodiment 2 In the first embodiment, the measurement is performed by lifting the work 21 with the support pin 37. In the second embodiment, the measurement is performed in a state where the work 21 is at a fixed position by the fixing jig 27. FIG. 8 shows a state of measurement in this embodiment. In the figure, reference numeral 61 denotes a non-contact measuring device for measuring using a laser beam. First, work 21
Is placed on a lower fixing jig 29, and the upper and lower fixing jigs 28, 29 sandwich it. Next, using a non-contact type measuring device 61, a laser beam is applied to a measuring point to measure a dimension. Thereafter, the correction is performed in the same manner as in the first embodiment. However, since the correction operation can be started from this state, the operation is reduced and the operation is simplified.

Embodiment 3 When the component assembled to the workpiece is a portion to be corrected and the component is movable with respect to the sheet metal portion, a means for driving the movable component can be provided in the correction device. .
FIG. 9 is a schematic sectional view showing the third embodiment. Reference numeral 62 denotes a rotor as a component, which is rotatable by attaching a shaft to the sheet metal portion 22 of the work 21. Reference numeral 63 denotes a dummy stator provided on the upper correction jig 31. The dummy stator 63 is provided with a winding, and a current can flow through the dummy stator to rotate the rotor 62. First, the work 21 is pinched and fixed by the fixing jig 27, and then, according to the fixing position,
The upper and lower correction jigs 31 and 32 are driven to clamp the work 21. Then, a current is passed through the winding of the dummy stator 63,
The rotor 62 is rotated. In this state, the upper surface of the rotor 62 is measured by the non-contact measuring device 61. Rotor 62
, The measured value differs depending on the rotational position of the rotor 62. Thus, the run-out of the rotor can be inspected.

[0022]

The present invention is constructed as described above, and has a pair of fixing jigs having a band-shaped end face and sandwiching a sheet-metal portion, and a pair of fixing jigs having a band-shaped end face and surrounding a portion to be corrected. In addition, since there is provided a pair of correction jigs for holding the sheet metal portion, the portion other than the correction target portion is not affected by the correction. Furthermore, even if the component is assembled to the portion to be corrected, the correction can be performed, and the overall accuracy can be obtained without making the accuracy of each part of the work strict.

Further, at least three dimensions can be measured by the measuring device, and by using at least three driving parts, the inclination of the surface can be inspected and corrected. Furthermore, by correcting the correction curve stored in the control device based on the results of the past correction work, the correction work becomes more efficient,
Increase accuracy. Further, the work is simplified by measuring the work at the fixed position. Further, when the component is movable, by providing a driving means for driving the component, the deflection of the movable component can be inspected.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a shape correcting device according to a first embodiment of the present invention.

FIG. 2 is a schematic plan view showing a measurement point and a holding portion according to Embodiment 1 of the present invention.

FIG. 3 is a block diagram illustrating a configuration of a control unit according to the first embodiment of the present invention.

FIG. 4 is a graph showing a correction curve according to the first embodiment of the present invention.

FIG. 5 is a flowchart illustrating a correction process according to the first embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view of the shape correction device showing a measurement state according to the first embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view of the shape correction device showing a correction state according to the first embodiment of the present invention.

FIG. 8 is a schematic sectional view of a shape correcting device according to a second embodiment of the present invention.

FIG. 9 is a schematic sectional view of a shape correcting device according to a third embodiment of the present invention.

FIG. 10 is a block diagram showing a conventional shape correction device.

FIG. 11 is an explanatory view showing a correction state by a conventional shape correction apparatus.

[Explanation of symbols]

21 work, 22 sheet metal part, 23 component, 2
4 measuring device, 27 fixing jig, 30 straightening jig, 31
Upper correction jig, 32 Lower correction jig, 33 Drive unit, 3
4 drive unit, 35 press device, 51 control device, 56
Correction curve, 62 rotor, 63 dummy stator.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shinichi Oe 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation

Claims (6)

[Claims] 1. A shape correcting apparatus for correcting a work including a sheet metal part made of a plastically deformable material into a desired shape, comprising: a measuring device for measuring a dimension of a part to be corrected of the work; and a band-shaped end face. Then, a pair of correction jigs surrounding the correction target portion of the work and sandwiching the sheet metal portion of the work, and having a band-shaped end surface, surrounding the correction jig and forming a sheet metal portion of the work. A pair of fixing jigs for holding and fixing, a driving device for driving one of the correction jigs to apply displacement thereto, and driving the other of the correction jigs in accordance with the displacement of one of the correction jigs A press device for holding the work by the correction jig, and a control device for calculating a drive amount of the drive device and controlling the drive device based on a deviation amount obtained from the measurement device. A shape correction device characterized by the above-mentioned. 2. The shape correcting apparatus according to claim 1, wherein the work includes a component part assembled to the sheet metal part, and measures and corrects a dimension of the part where the component part is assembled. 3. The measuring device according to claim 1, wherein at least three of the portions to be corrected are provided.
3. The shape correction device according to claim 1, wherein the drive unit has at least three drive units that can measure the dimensions of the location and can operate independently of each other. 4. The control device stores a correction curve representing a relationship between a displacement amount of a driving device and a correction amount of a workpiece, and corrects and uses the correction curve based on a result of a past correction work. The shape correction device according to claim 1. 5. A work which is at a position fixed by a fixing jig is measured by a measuring device.
The shape correcting device according to any one of claims 1 to 4. 6. The shape correcting apparatus according to claim 2, wherein the component is movable with respect to the sheet metal portion, and further comprising a driving unit for driving the component.