JPH08107659A - Method and device for forming cylindrical steel plate - Google Patents

Abstract

PURPOSE: To abbreviate the cutting edge maintenance of a mold and the burr finishing process of an object to be machined by opening a ventilation window of the object to be machined by the relative motion of a rotary table and a laser machining head and pinching the object to be machined with a die and a punch for forming a drip-proof breathing window. CONSTITUTION: Laser beams are applied from a laser machining head 33, a breathing window 3 of a work piece 4 to be machined is opened by the rotation of a rotary table 32 and the up/down of the laser machining head 33, and at the same time a shear side 2a of a drip-proof breathing window 2 of the work piece 4 to be machined is subjected to slit machining. In another process, a press part is dropped, the object 4 to be machined is pinched by a die and a punch, and the breathing window 2 is formed at the object 4 to be machined by the inner formation part of the die and the outer formation part of the punch. In this case, the shear machining of the work piece 4 to be machined is all performed by laser machining, thus preventing burr from being generated and hence achieving an improved appearance, and abbreviating the cutting edge maintenance of a mold and the burr finishing process of the work piece 4 to be machined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding method and a molding apparatus for processing a plurality of ventilation windows and a drip-proof ventilation window on a peripheral wall of a cylindrical work piece.

[0002]

2. Description of the Related Art FIG. 5 shows a motor frame 1. This motor frame 1 has a ventilation window 3 on a cylindrical peripheral wall, and a drip-proof ventilation window 2 for preventing raindrops from entering on the peripheral wall which faces upward when the motor is installed. A method of forming the opening of the ventilation window 3 and the drip-proof ventilation window 2 will be described below.

As a method for making holes in the ventilation window 3, as shown in FIGS. 8 to 9, a shear die 5 having a contour larger than the window shape by a punching clearance is arranged inside the motor frame 1 and the motor is used. A shear punch 6, a stripper 7, and a spring 8 having the same contour as the window shape are arranged outside the frame 1 so as to be able to approach and separate from the shear die 5. By lowering the wedge-shaped pressing member from above the shear punch 6, the shear punch 6, stripper 7 and spring 8 are moved in the direction of the shear die 5 and pressed by the stripper 7 by the force of the spring 8. The motor frame 1 is drilled by the shearing action of the shearing punch 6 and the shearing die 5.

As a method for forming the drip-proof ventilation window 2, FIG.
As shown in FIGS. 1 to 11, a cutting blade that shears the shear side 2a inward of the motor frame 1, a shear bending punch 9 having a convex portion for bending the bend side 2b, a stripper 10, and a spring 11 are provided in the shear bending die. It is arranged so that it can approach and separate from 12. By lowering the wedge-shaped push-up member from above the shear bending punch 9, the shear bending punch 9, stripper 10 and spring 11 are moved in the direction of the shear bending die 12 and the force of the spring 11 causes the stripper 10 to move. Shear bending punch 9 and shear bending die 12 are used to press the pressed motor frame 1.
It is formed by the shearing action and bending action of.

[0005]

In the prior art, both the ventilation window 3 and the drip-proof ventilation window 2 are formed by the shearing punch 6, the shearing die 5, the shearing bending punch 9 and the shearing bending die 12 by the respective shearing action. Motor frame 1
Burrs are generated on the inner wall side of the and need to be removed. Further, a broken surface is generated on the cross section of the motor frame 1 that is sheared, and the appearance is deteriorated. Since the shear punch 6, the shear bending punch 9, the shear die 5, and the shear bending die 12 have cutting blades, there is a problem that regeneration is required depending on their consumption.

The present invention has been made in view of the above circumstances, and its object is to provide a good appearance in processing a plurality of ventilation windows and drip-proof ventilation windows on a peripheral wall of a cylindrical workpiece. (EN) Provided are a cylindrical steel plate forming method and a forming apparatus capable of omitting maintenance of a cutting edge of a mold and a burr finishing process of a workpiece.

[0007]

In a machine for processing a plurality of ventilation windows and drip-proof ventilation windows on a peripheral wall of a cylindrical work piece, the work piece is provided below the work piece and concentrically with the center of the work piece. A rotatable rotary table is placed, and a laser processing head that can move from the center to the outer peripheral direction and the vertical direction is placed around the outer periphery of the workpiece, and the ventilation window is drilled by the relative movement of the rotary table and the laser processing head. In the slit processing of the shear side of the drip-proof ventilation window, a die having an inner molding portion for forming the drip-proof ventilation window is arranged inside the work piece, and the outer side is formed around the outer circumference of the work piece. A punch having a molding portion is arranged so as to be able to approach and separate from the die, and a wedge-shaped pressing member is lowered from above the punch to move the punch, and the work is pinched by the die and the punch. Drip-proof Method of forming a cylindrical steel plate so as to form a window. (Claim 1) When a plurality of ventilation windows and drip-proof ventilation windows are formed on a peripheral wall of a cylindrical work piece, a rotary table which is rotatable concentrically with the center of the work piece and the outside of the work piece. A laser machining head that can move from the center to the outer peripheral direction and the vertical direction around the periphery, and a lower die holder that is attached to the lower base of the press machine,
A die fixed to the lower mold holder and having an inner molding portion for forming the drip-proof ventilation window on the outer peripheral surface, and the inner molding provided so as to be able to approach and separate from the outer periphery of the die in the lower mold holder. A punch having an outer molding portion at a position facing the upper part, an upper die holder attached to the upper base of the press, and a lowering of the upper lift base attached to the upper die holder above the punch. And a wedge-shaped pressing member that moves the punch in the direction of the die to pinch a cylindrical workpiece with the die. (Claim 2)

[0008]

The laser beam is emitted from the laser processing head, and the ventilation window of the workpiece is opened by the rotation of the rotary table and the vertical movement of the laser processing head. Also, when the laser beam is emitted from the laser processing head, the rotary table is rotated and the laser processing head is moved up and down to slit the drip-proof ventilation window shear side of the workpiece, and when the pressing part is lowered in a separate process, it becomes wedge-shaped. The punch is moved in the die direction from the above. As a result, the work piece is clamped by the punch and the die, and the inner molding part of the die and the outer molding part of the punch form a drip-proof ventilation window in the work piece. In this case, since shearing of the workpiece is all performed by laser processing, burrs do not occur. Since it is not processed by a punch and a die, it is not necessary to regenerate it by exhausting the cutting edge.For the opening of the ventilation window, a ventilation window of any shape can be used regardless of the size of the work piece or the shape of the ventilation window. It can be opened.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. The same parts as the subordinates will be described using the same reference numerals. The rotary table 32 is rotated concentrically with the cylindrical steel plate workpiece 4 by a numerically controlled motor (not shown). On the outside of the work piece 4, linear movement is performed in the vertical direction and the radial direction by a numerically controlled motor, a ball screw, and a linear operation guide, which are not shown. Further, a punch holder 21 is provided in the lower die holder 20 in a separate step, and a circular recess 21a is formed in the center of the punch holder 21 as shown in FIG. 3, and an inner surface of the recess 21a is formed. A guide groove 21b is formed in the radial direction. Recess 21 that is the center of punch holder 21
a is a bending die 22 that is concentrically and substantially cylindrical.
Is attached, and an inner molding portion 23 is formed on the outer peripheral surface of the bending die 22 so as to face the guide groove 21b.

In this case, the bending die 22 is the bending die body 2
2a and a disc-shaped upper plate portion 22b detachably attached to the upper portion of the bending die 22, and the inner molding portion 23 is vertically long except for the upper and lower end portions of the bending die 22. . Further, in the lower die holder 20, a bending punch 24 is provided in each guide groove 21b, which is the outer periphery of the bending die 22, so as to be movable in a direction toward and away from the bending die 22. An inclined surface 25 having an angle α is formed on the outer surface of the bending punch 24, and an outer molding portion 26 is formed on the inner surface. This outer molding 2
6 is opposed to the inner molding portion 23 of the bending die 22.

Each bending punch 24 has a tension spring 2
7, it is constantly urged to move in a direction away from the bending die 22. These punch holder 21, bending die 2
Lower mold holder 20 including 2 and bending punch 24, etc.
Is attached to the lower base of a press machine (not shown).

On the other hand, the upper die holder 29 has a pressing member 3
Nos. 0 are mounted in a circumferentially equidistant form, and the pressing member 30 is located above each bending punch 24. The pressing member 30 has a slant surface 25 with an angle α formed on the inner surface thereof and has a wedge shape. The upper die holder 29 is adapted to be attached to the upper base of a press machine (not shown).

Now, a drip-proof ventilation window and a method of forming the ventilation window by the apparatus configured as described above will be described. Figure 7
The cylindrical workpiece 4 shown in (1) is concentrically arranged on the rotary table 32, and laser light is emitted from the laser processing head 33. When the ventilation window 3 is punched, the contour of the ventilation window 3 is cut out by rotating the rotary table 32 and the linear movement of the laser processing head 33. When the drip-proof ventilation window 2 is formed, the shear side 2a of the drip-proof ventilation window 2 is slit by the rotation of the rotary table 32 and the linear movement of the laser processing head 33, and then the workpiece 4 is bent.
And the respective bending punches 24 (relatively, the bending die 22 is located inside the work piece 4 and the bending punch 24 is located around the outer circumference of the work piece 4), and the upper side of the press machine The base is lowered to lower the pressing member 30. As a result, the slope 25 of the pressing member 30 comes into contact with the slope of the bending punch 24,
By further lowering the pressing member 30, the bending punch 24 moves in the direction of the bending die 22 against the spring force of the spring 27.

As a result, the inner molding portion 23 of the bending die 22 is
The work piece 4 is pinched by the outer molding portion 26 of the bending punch 24 and the drip-proof ventilation window 2 is formed. Then, when the upper base of the press is raised, the pressing member 30 rises and the bending punch 24 moves in the direction away from the bending die 22 by the spring force of the spring 27. (Return to the original position.) After that, the upper plate 22b of the bending die 22 is removed, and the workpiece 4 after molding, that is, the motor frame 1 shown in FIG. 5 is taken out. A drip-proof ventilation window 2 is formed in this.

As described above, according to this embodiment, the workpiece 4 is
Of the drip-proof ventilation window 3 by rotating the laser beam and the linear motion of the laser processing head 33, and slitting the sheared side 2a of the drip-proof ventilation window 2 by rotating the workpiece 4 and the linear motion of the laser processing head 33. After that, the wedge-shaped pressing member 30 is lowered in a separate step to move the bending punch 24 toward the bending die 22, thereby punching the ventilation window 3. Further, the shear side drip-proof ventilation window 2 of the drip-proof ventilation window 2 is formed by the rotation of the workpiece 4 and the linear movement of the laser processing head 33. That is, according to the present embodiment, since the shearing of the workpiece 4 is all performed by laser processing, burrs do not occur, and thus the deburring step is not necessary. Since it is not processed by a punch and a die, it is not necessary to regenerate it by exhaustion of the cutting blade, and the opening of the ventilation window 3 can be any shape regardless of the size of the workpiece 4 and the shape of the ventilation window 3. The ventilation window can be opened with one device.

[0016]

As described above, according to the apparatus of the present invention, since the shearing of the workpiece is all performed by laser processing, no burr is generated. Since it is not processed by a punch and a die, it is not necessary to regenerate it by exhausting the cutting edge, and regarding the opening of the ventilation window, it is possible to use a ventilation window of any shape regardless of the size of the workpiece or the shape of the ventilation window. There is an effect that can be opened by the device.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention,

FIG. 2 is a vertical sectional front view showing an embodiment of the present invention,

FIG. 3 is a cross-sectional plan view of a lower die holder part,

FIG. 4 is a vertical sectional front view for explaining the operation.

FIG. 5 is a perspective view of a motor frame,

6 is a cross-sectional plan view taken along the line AA of FIG.

FIG. 7 is a perspective view of a workpiece,

FIG. 8 is a cross-sectional plan view showing another embodiment,

FIG. 9 is a vertical sectional front view showing another embodiment,

FIG. 10 is a cross-sectional plan view showing another embodiment,

FIG. 11 is a vertical sectional front view showing another embodiment.

[Explanation of symbols]

4, workpiece, 20, lower die holder, 21, punch holder, 21a, concave portion, 21b, guide groove, 22, bending die, 22a, bending die body, 22b, upper plate portion, 23, inner type forming portion, 24 , Bending punch, 25, inclined surface, 26, outer shape forming part, 27, spring, 29, upper die holder, 30, pressing member, 32,
Rotary table, 33, laser processing head.

Claims (2)

[Claims] 1. In a machine for processing a plurality of ventilation windows and drip-proof ventilation windows on a peripheral wall of a cylindrical work piece, a rotation capable of rotating below the work piece and concentric with the center of the work piece. Along with the table, a laser processing head that can move from the center to the outer peripheral direction and the vertical direction is arranged around the outer periphery of the workpiece, and the ventilation window is punched by the relative movement of the rotary table and the laser processing head. In the slit processing of the shear side of the drip-proof ventilation window, a die having an inner molding part for forming the drip-proof ventilation window is arranged inside the work piece, and the outer molding part is provided on the outer periphery of the work piece. The punch is arranged so as to be close to and away from the die, and a wedge-shaped pressing member is lowered from above the punch to move the punch, and the work is pinched by the die and the punch to perform drip-proof ventilation. I'll form a window A method for forming a cylindrical steel sheet, characterized in that 2. A rotary table which is concentric with the center of the workpiece and which is provided outside the workpiece, wherein a plurality of ventilation windows and drip-proof ventilation windows are formed on the peripheral wall of the cylindrical workpiece. A laser processing head that can move from the center to the outer peripheral direction and the vertical direction around the periphery, a lower mold holder attached to the lower base of the press machine, and a lower mold holder fixed to this lower mold holder for forming the drip-proof ventilation window on the outer peripheral surface. A die having an inner molding portion, a punch having an outer molding portion at a position facing the inner molding portion that is provided in the lower die holder so as to be close to and away from the outer periphery of the die; The upper die holder attached to the upper base, and the punch moved in the die direction as the upper lift base attached to the upper die holder located above the punch moves downwards to form a cylindrical shape. 2. A cylindrical steel plate forming apparatus, comprising: a wedge-shaped pressing member that presses the workpiece to be processed with the die.