JPH01113124A - High precision shape correcting equipment for section of square tube - Google Patents

Abstract

PURPOSE:To enlarge a range possible to correct by providing 1st lower die constraining three surfaces, right, left and lower of a square tube, arranging a 2nd lower die constraining two lower inclines and corner parts, right and left, and selecting two setting methods. CONSTITUTION:The lower die 1 provided with a constraining plate 2 and constraining taper piece 13 possible to travel in a width direction is arranged to a long size square tube 5. In addition, there are arranged lower dies 3, 4 which can constrain separately two lower inclines and corner parts, right and left in the lower direction of the square tube 5. When the lower die 1 is used in the setting method for two kinds of square tubes 5, the tubes are constrained in a width direction by the constraining plate 3 taking in and out the constraining taper piece 13. When the lower dies 3, 4 are used, the corner parts are set so that they take positions, upper and lower, right and left, and the tube 5 is deformed by a correcting punch 7 having a sensor 8 after the correcting press 6 is positioned. The control of deforming capacity enables optional correction of the width dimensions and the inclines and the range capable of correction is enlarged.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is based on the shape measurement data of the workpiece, and measures the dimensional tolerances such as the width dimension, overall direction, and the amount of unevenness of the cross section.
The present invention relates to a correction device suitable for correcting the shape of NG points with high precision.

[Conventional technology]

Conventionally, there is a method for deforming thin-walled squares using a full mold using an upper die and a lower die, and deforming in the - process, but due to the difference between the cross-sectional shape of the workpiece and the inner circumference of the full die, abnormalities This may cause severe deformation or buckling.

There is also a method of locally applying deformation by manual hammering, but this is not practical because the modification is not reproducible due to the hammering method, force, etc.

As described in Japanese Patent Application Laid-Open No. 60-221129, a circular pipe is corrected to roundness using rotating rolls, and
As described in Japanese Patent Publication No. 53-65253, there is a method in which a circular tube is supported with rolls and dies and corrected into an ellipse with three punches, but the point is that any surface of the square tube is corrected with punches. was not considered.

[Problem that the invention seeks to solve]

When modifying the cross-sectional shape of a relatively thin-walled pipe, the deformation progresses to the other surface, and the deformation applied to the other surface varies depending on the amount of deformation. Even that has been considered difficult.

The purpose of the present invention is to provide a correction press that applies a static load, has a relatively simple structure, can accommodate variations in the dimensions of the workpiece, is equipped with a lower mold that can be restrained arbitrarily, and uses an upper punch with a relatively large cross-sectional area. The purpose is to modify the cross-sectional shape of a thin-walled pipe into an arbitrary shape by applying a static load and controlling the amount of punch deformation.

[Means for solving problems]

The above purpose is to set the correction surface as the upper surface and the left and right lower surfaces according to the correction point and amount of correction of the workpiece after the correction press part main body and lower mold part move to the correction point by the same drive based on the shape data of the workpiece. The lower die 1 restrained the workpiece 9
After selecting the lower mold 2 that can restrict the two lower slopes and the left and right corners individually in the width direction when rotated by 0 degrees, use the upper punch with arbitrary corner R and flat parts of the correction press main body. This is achieved by controlling the positioning in the direction perpendicular to the workpiece and controlling the amount of deformation from the point where the workpiece and the upper punch come into contact.

[Effect]

Based on the shape measurement data of the workpiece, correction points,
Lower mold 1 and lower mold 2 are selected depending on the amount of correction and the correction method. Lower die 1 is selected when the width of the workpiece is larger than the allowable dimensional tolerance, and the sides with the larger width are set up and down; the left and right sides are restrained to prevent further deformation, and the upper punch of the correction press is applied. By deforming only the top surface with , only the top surface is modified. Lower mold 2 is selected when the width dimension of the workpiece is smaller than the allowable dimensional tolerance, the workpiece is set with 906 rotations from the state of lower mold 1, and the corner apex is deformed with the upper punch. As a result, the two upper slopes deform outward. In order to control the amount of correction, there are various methods of constraining the width dimensions of the left and right corners at the same time, constraining them individually, not constraining them, and deforming the corner R of the workpiece using the corner R of the upper punch. By combining them, any shape modification of the workpiece can be performed with high precision.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

A lower mold 1 having a relatively thin wall and movable in the width direction with respect to a long rectangular tube 5 and having a restraint plate 2 and a restraint taper piece 13. 3. Lower left type that can restrict the two lower slopes and the left and right corners of the rectangular tube 5. A lower mold with a lower right mold 4 and a lower mold 1. Lower mold 3, 4
a support stand 11 that moves up and down, a support stand support 10 that receives reaction force during correction, and a correction press main body 6 that moves up and down with a screw shaft by rotating a motor 9.
A correction press section with a correction punch 7 equipped with a sensor 8 for detecting the point of contact with the rectangular tube 5 at the tip of the same frame 1
2, the frame 12 is moved to a correction point based on the shape measurement data of the rectangular tube 5, and while the support base 11 is lowered, the lower mold 1.
After selecting the lower molds 3 and 4, the support stand 11 is raised and the support stand support 10 is moved under the support stand 11. In the case of the lower mold 1, the restraint plate is removed by moving the restraint taper piece 13 in and out. 2, restrain the square tube 5 in the width direction, and in the case of the lower mold 3.4, set the square tube 5 so that the corner parts are on the top, bottom, left and right, After controlling the method of restraining the corner part and positioning the correction press 6 which is raised and lowered by rotating the servo motor 9 and turning the screw shaft, a sensor 8 is attached to the tip to detect the point of contact with each type of pipe 5. By deforming the rectangular tube 5 with the correction punch 7 and controlling the amount of deformation, it can be corrected into any shape. According to this embodiment, the amount of correction of the rectangular tube 5 in the case of the lower mold 1 is as shown by the - dotted chain line, and the width dimension is as follows.

It becomes small and does not affect the shape of the other side. In the case of the lower molds 3 and 4 shown in FIGS. 2 to 5, by selecting one of the four restraint methods, the rectangular tube 5 is deformed as shown by the broken line, and the amount of modification of the two upper slopes can be arbitrarily controlled. Can be done.

〔Effect of the invention〕

According to the present invention, by controlling the amount of displacement of the upper punch of the press unit for correcting the dimensions of the rectangular tube, the surface to be corrected can be corrected into an arbitrary shape.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention, and FIG. 2 is a front view of an embodiment of the present invention. 3, 4, and 5 are cross-sectional views of the lower die. 1... Lower mold, 2... Restriction plate, 3... Lower left mold, 4.
...Lower right mold, 5...square tube, 6...correction press body.

Claims (1)

[Claims] 1. For a workpiece that is a relatively thin rectangular tube, move the first lower mold, the second lower mold, the first lower mold, and the second lower mold, which are movable in the width direction, onto the workpiece. - A support base to be lowered and movable in the axial direction with respect to the workpiece, and for positioning and correcting the first lower mold, the second lower mold, and the support in the upward and downward directions. It has a lower mold part consisting of a support base that receives a reaction force, and an NC control part in the upper, lower, and right angle directions with respect to the workpiece, and a sensor that detects the point of contact with the workpiece. In a shape modification device that enables NC control of the provided shape modification press main body in the axial direction with respect to the workpiece, two setting methods are selected depending on the modification point of the workpiece, and the shape correction press body is The first lower mold restrains the tube on the left, right, and lower three sides, and the second lower mold can restrain the lower two slopes and the left and right corner portions in the width direction when rotated 90 degrees. A rectangular tube characterized in that an upper punch having a shape corresponding to the corner radius and width dimension of the workpiece is provided with a function of moving in an axial direction, a right angle direction, and an upward and downward direction with respect to the workpiece. High-precision shape correction device for cross sections.