JPH0751750A - Sheet metal working device and method therefor - Google Patents

Abstract

PURPOSE:To prevent the shape deformation and the position deviation of a hole provided in a material to be worked when performing the bending work of the material to be worked by providing a projecting part pressurizing and fixing a sheet with the load of a deformation stress on the plane of the sheet or more, on a base plate or a pressurizing member in the vicinity of the sheet metal working part. CONSTITUTION:A punch 4 for bending, supported by a punch plate 1 is lowered, and a material 6 to be worked is held between a die plate 3 and a material keep plate 2 pressurized by pressurizing a mechanism 5. The held material 6 is restricted between a part to be bent of the material and a part not to be bent by material restriction parts 2a and 3a provided respectively on the material keep plate 2 and the die plate 3. A bending punch 4 is lowered, and is brought into contact with the material 6 to squeeze the material 6, and bending is performed by the die plate 3. Thus, the part not to be bent can be prevented from being applied with stress by fixing the material 6 with the material restriction parts 2a and 3a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet metal processing apparatus and method for outsert molding a polymer material for mounting a sheet metal or a mechanical component such as a VTR.

[0002]

2. Description of the Related Art FIG. 8 is a diagram showing a conventional method for processing a sheet metal. In the figure, 1 is a punch plate, 2 is a material pressing plate, 3 is a die plate, and 4 is a punch plate 1.
The bending punch 5 supported by the pressurizing mechanism 5 is a pressing mechanism embedded in the material pressing plate 2, and 6 is a material to be processed, such as a sheet metal. The pressurizing mechanism 5 may be, for example, an elastic member for pressurizing.

Next, the operation will be described. Conventionally, sheet metal or the like is bent by using a sheet metal working die device as shown in FIG. In the above device, there is a guide shaft (not shown) provided on the outer peripheral portion of the bending punch 4. The guide shaft is punch plate 1 and material pressing plate 2
And is pierced through the material pressing plate 2. In order to bend the sheet metal, the bending punch supported by the punch plate 1 is moved down while sliding coaxially with the guide shaft, and the work material 6 is sandwiched between the material holding plate 2 and the die plate 3. In this state, the bending process is performed by the bending punch 4 and the die plate 3.

[0004]

As described above, in the conventional bending of sheet metal, the material pressing plate 2 tries to press the entire surface of the material 6 to be processed, but due to the flatness of the material, the error in the plate thickness, etc. I could only hold it down partially. Therefore, when the bending process is performed, the pressed sheet metal is pulled in the direction in which it is about to be bent, so that a problem such as displacement of the position of the material to be processed sandwiched between the die plate 3 and the material pressing plate 2 is likely to occur. .
This is because the deformation stress of the material to be processed 6 caused by bending occurs on the flat surface, the holding force is insufficient, and the position of the pressed sheet metal is displaced. Therefore, there is a problem that a component mounting hole, a molding hole, and the like provided near the bendable portion of the material to be processed 6 are deformed or misaligned.

The present invention has been made to solve the above-mentioned problems, and when bending a material to be processed, it is possible to suppress the shape deformation and the positional deviation of the hole provided in the material to be processed. To aim.

[0006]

A sheet metal working apparatus of the present invention is a sheet metal working apparatus comprising a table on which a sheet metal is placed and a pressing member for pressing and fixing the sheet metal from above the table during processing. Near the processed portion, at least one of the table and the pressing member is provided with a protrusion that press-fixes the sheet metal with a load equal to or greater than the deformation stress on the sheet metal plane.

In the sheet metal working method according to the second aspect of the present invention, when the sheet metal is placed on the table and is pressed and fixed by the pressing member to perform bending, at least one of the table and the pressing member is near the sheet metal processed portion. The sheet metal is held down by the protrusions provided on the.

In the sheet metal working method according to the third aspect of the present invention, the sheet metal is provided with a step portion, and the step portion is engaged with the protruding portion to press and fix it, and then the bending is performed.

In the sheet metal working method according to the fourth aspect of the present invention, a hole is provided in the sheet metal, and a protrusion is engaged with the hole to press and fix the hole to perform bending.

[0010]

In the sheet metal working apparatus according to the present invention, when the sheet metal is bent, the projections are provided in the vicinity of the sheet metal working portion of the table or the pressing member for sandwiching the sheet metal, and the flat surface of the sheet metal when the bending is performed. Since a load more than the stress is concentrated on the protrusions and the sheet metal is constrained to perform bending,
The deformation stress generated during bending does not act on the non-bent portion of the material to be processed, so that the deformation and displacement of the component mounting hole can be suppressed.

In the sheet metal working method according to the second aspect of the present invention, the bending is performed by restraining the sheet metal with the protrusions. Therefore, the sheet metal is restrained by the protrusions, and the deformation stress generated during the bending process bends the sheet metal. Since it does not work on the non-existing part, it is possible to suppress the deformation and displacement of the component mounting hole.

In the sheet metal working method according to the third aspect of the invention, a step is provided in the thickness direction of the sheet metal, and the step is restrained by the projection so that the bending is performed. The constrained deformation stress generated at the time of bending does not act on the non-bent portion of the sheet metal, so that the deformation and displacement of the component mounting hole can be suppressed.

In the sheet metal working method according to the fourth aspect of the present invention, the sheet metal is provided with a hole, and the hole is restrained by the projection so that the bending is performed. The deformation stress generated during bending does not act on the non-bendable portion of the sheet metal, and the deformation and displacement of the component mounting hole can be suppressed.

[0014]

【Example】

Example 1. Hereinafter, the first embodiment of the present invention will be described with reference to FIGS.
3 will be described. FIG. 1 is an external view, side view and front view of a sheet metal for outsert molding on which mechanical parts such as a video are mounted, FIG. 2 is a side view illustrating bending of the sheet metal, and FIG. 3 is material restraint of a portion where the material can be bent. The figure explaining a state. In the above-mentioned figures, those denoted by the same reference numerals as those in FIG. 8 have the same configurations, and detailed description thereof will be omitted. In the figure, 2a is a material restraint portion provided on the surface of the material pressing plate 2 that contacts the workpiece 6, and 3a is a material restraint portion provided on the surface of the die plate 3 that contacts the workpiece 6.

Next, the operation will be described. The bending punch 4 supported by the punch plate 1 is lowered, and the material 6 to be processed is sandwiched between the material 6 and the die plate 3 by the material pressing plate 2 pressed by the pressing mechanism 5. The material to be processed 6 sandwiched is constrained between the bendable portion and the non-bendable portion of the material by the material restraining portions 2a and 3a provided on the material pressing plate 2 and the die plate 3, respectively, and the bending punch is used. 4 is lowered and brought into contact with the material 6 to be processed and ironed, and bending is performed with the die plate 3. By fixing the material 6 to be processed by the material restraining portions 2a and 3a in this manner, stress is applied to a portion which is not bent (a portion which is sandwiched between the material pressing plate 2 and the die plate 3 and which is not hit by the punch for bending). This can be prevented, and deformation and displacement of the component mounting holes and molding holes (holes as shown in FIG. 1) provided in the material can be suppressed.

This is because the two bases or plates that sandwich the material to be processed are provided with protrusions at the portions located between the portions where the material can be bent and the portions where the material cannot be bent, and the material to be processed when the bending is performed. Load above the plane stress of
Since the work material 6 is restrained and the bending work is performed by concentrating it on a and 3a, the deformation stress generated during the bending work does not act on the non-bendable part of the work material, and the deformation of the component mounting hole occurs. This is because it is possible to suppress the positional deviation.

Example 2. The second embodiment of the present invention will be described below with reference to FIGS. FIG. 4 is a side view for explaining the bending process of the sheet metal, and FIG. 5 is a view showing the restrained state of the portion where the material is bent. In FIGS. 4 and 5, those denoted by the same reference numerals as those in FIG. 8 have the same configuration, and detailed description thereof will be omitted. In the figure, 2b is a material restraint portion provided on the surface where the material pressing plate 2 contacts the workpiece 6, 3b is a material restraint portion provided on the surface where the die plate 3 contacts the workpiece 6, and 6b is a workpiece. It is a step portion provided in advance on the material 6.

Next, the operation will be described. The bending punch 4 supported by the punch plate 1 is lowered, and the material 6 to be processed is sandwiched between the die plate 3 and the material pressing plate 2 pressed by the pressing mechanism 5. The material restraining portions 2b and 3b are engaged with the stepped portion 6b of the sandwiched work material 6 to restrain the material. In this state, the bending punch 4 is further lowered to bring it into contact with the material 6 to be processed, and ironing is performed to perform bending. As described above, the material restraining portion 2 is provided on the step portion 6b provided with the portion that avoids the deformation and the portion that is bent.
By pressing b and 3b to press the material to be processed, the material can be surely pressed, and stress can be prevented from being applied to the portion where deformation due to bending is avoided.

This is because a step is provided in the thickness direction of the material to be processed between a bendable portion and a non-bendable portion, and the step is restrained by the material restraining portions 2a and 3a to perform bending. Therefore, the stepped portion 6b is restrained, and the deformation stress generated during bending does not act on the non-bent portion of the material 6 to be processed, so that the deformation and displacement of the component mounting hole can be suppressed.

Example 3. The third embodiment of the present invention will be described below with reference to FIGS. 6 and 7, those denoted by the same reference numerals as those in FIG. 8 have the same configurations, and detailed description thereof will be omitted. In the figure, 2c is a material restraint portion provided on the surface where the material pressing plate 2 contacts the workpiece material 6, 3 is a material restraint portion provided on the surface where the die plate 3 contacts the workpiece material 6, and 6c is the workpiece workpiece It is a hole provided in the material. The hole 6c is provided in the vicinity of the component mounting hole or the like so that stress is not applied to the component mounting hole or the like during bending.

Next, the operation will be described. The bending punch 4 supported by the punch plate 1 is lowered, and the material 6 to be processed is sandwiched between the die plate 3 and the material pressing plate 2 pressed by the pressing mechanism 5. The material restraint portions 2c and 3c are provided in the holes 6c provided in the sandwiched work material 6.
Engage and constrain the material. In this state, the bending punch 4 is further lowered to bring it into contact with the material 6 to be processed, thereby performing bending. As described above, the material restraining portions 2c and 3c are engaged with the hole portions 6c provided with the portion to be deformed and the portion to be bent, and the material to be processed 6 is pressed, so that the material is reliably pressed, and the deformation due to bending is caused. It is possible to prevent stress from being applied to the part avoiding.

This is because a hole 6c is provided in the material to be processed between a portion where the material to be processed can be bent and a portion which cannot be bent, and the hole 6c is restrained by the material restraining portions 2a and 3a to perform bending. Therefore, the deformation stress generated at the time of bending does not act on the unbent portion of the material 6 to be processed, so that the deformation and displacement of the component mounting hole can be suppressed.

[0023]

As described above, according to the present invention, when a sheet metal is bent, a plate for sandwiching a material is provided with a protrusion so as to hold down the material, or a protrusion and a material provided on the plate for sandwiching the material are provided. By pressing the material by engaging the stepped part provided, or by pressing the material by engaging the protrusion provided on the plate sandwiching the material and the hole provided in the material The binding between the part that avoids deformation due to bending under a load greater than the deformation stress and the part that will be bent becomes reliable, deformation and movement of sheet metal holes etc. can be eliminated, and highly accurate bending of sheet metal can be performed. It

[Brief description of drawings]

FIG. 1 is an external view of a sheet metal for outsert molding on which a mechanical component such as a video according to the present invention is mounted.

FIG. 2 is a side sectional view showing bending of a sheet metal according to the embodiment of the present invention.

FIG. 3 is a side cross-sectional view of a restrained state in the vicinity of bending in bending according to the embodiment of the present invention.

FIG. 4 is a side sectional view showing bending of a sheet metal according to an embodiment of the present invention.

FIG. 5 is a side sectional view showing a restrained state in the vicinity of bending in bending according to the embodiment of the present invention.

FIG. 6 is a side sectional view showing bending of a sheet metal according to an example of the present invention.

FIG. 7 is a side sectional view showing a restrained state in the vicinity of bending in bending according to the embodiment of the present invention.

FIG. 8 is a side sectional view showing a bending process of a conventional sheet metal.

[Explanation of symbols]

 1 Punch Plate 2 Material Pressing Plate 2a Material Restraint 2b Material Restraint 2c Material Hole Restraint 3 Die Plate 3a Material Restraint 3b Material Restraint 3c Material Hole Restraint 4 Bending Punch 5 Pressing Mechanism 6 Workpiece 6b Step Part 6c hole

Claims (4)

[Claims] 1. A sheet metal working apparatus comprising a table on which a sheet metal is placed and a pressing member for pressing and fixing the sheet metal on the table during processing, in the vicinity of the sheet metal working portion, the table or the pressing member. A sheet metal working apparatus characterized in that at least one of them is provided with a protrusion for pressing and fixing the sheet metal with a load equal to or greater than the deformation stress on the sheet metal plane. 2. When a sheet metal is placed on a table, and is pressed and fixed by a pressing member to perform bending, a protrusion provided on at least one of the table and the pressing member near the sheet metal processed portion. A sheet metal working method, characterized in that the sheet metal is pressed. 3. The method of processing a sheet metal according to claim 2, wherein the sheet metal is provided with a step portion, and the step portion is engaged with the projecting portion to press and fix the step portion, and bending is performed. 4. The method of processing a sheet metal according to claim 2, wherein the sheet metal is provided with a hole, and a protrusion is engaged with the hole to press and fix the hole to perform bending.