JPH0444263Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a one-shot forming device that simultaneously punches out the edge of a metal plate and simultaneously bends it.

(Prior art) The seventh method is used for punching out the edges of a press-formed metal plate work and bending it.
There is a punching and bending device as shown in the figure.

The structure of this conventional device is shown in Fig. 7 and D in Fig. 7.
This will be explained with reference to FIG. 8, which is a view taken along the arrow -D, and FIG. 9, which is a view taken along the line E-E in FIG. 7.

The conventional punching and bending device 101 includes a fixed lower die 10.
The punch 103 fixed to 2 and this punch 10
3, a pad 105 that presses down the metal plate work 104 placed on the workpiece 104, a front elevating cutting blade 106 and a rear elevating cutting blade (not shown) that pull out the front and rear edges of the work 104, the left side of the work 104, A left vertical punching and bending blade (not shown) and a right vertical punching and bending blade 107 for punching and bending the right edge are provided.

These blades are suspended from a lifting die 108 that can be raised and lowered freely, and are arranged in a square shape when viewed from above. In addition, the pad 105 is connected to the lifting mold 1 via springs 109...
It is suspended from 08. Reference numeral 110 denotes a lower right blade that stands up from the fixed lower mold 102 so as to come into sliding contact with the right lifting and bending blade 107 .

Next, the operation of the conventional device will be described.

The workpiece 104 is placed at a predetermined position on the punch 103, and then pressed downward by the pad 105.

As the elevating die 108 moves, the front elevating punching blade 106 and the right elevating punching and bending blade 107 descend to punch out or punch and bend the workpiece 104, respectively.

That is, the cutting edge portion 107 of the right lifting/lowering bending blade 107
a cooperates with the lower right blade 110 to shear the notch line F1 portion shown by the imaginary line in FIG. Then, the portion F2 in the figure is sheared, and the front elevating punching blade 106 cooperates with the lower blade portion 103a formed on the side surface of the punch 103 to shear the portion G in the figure.

Then, in the right lifting/lowering punching/bending 107, the right edge of the workpiece 104 is further bent downward at its lower surface portion 107c and back surface portion 107d to obtain the punched and bent metal plate shown in FIG.

(Problems to be Solved by the Invention) In the above-described apparatus, the punch, the lower blade, the elevating punching blade, and the punching and bending blade are replaced or rearranged every time the punching dimensions of the workpiece change.

However, with the diversification of products in recent years,
The frequency of changes in only the F1 portion of Figure 0 is increasing.

Therefore, there is a strong need for a punching and bending device that has simple operation and structure and can change the punching dimension in the front-rear direction.

(Means for Solving the Problems) In order to meet the above requirements, the present invention lengthens the left and right lifting and lowering bending blades, and abuts the end faces of the front and rear lifting and lowering blades against the back surface of the lifting and lowering bending blades. In addition, a tapered projecting blade portion having a height approximately equal to the bending length of the workpiece was protruded downward from the ends of the front and rear elevating punching blades to form a punching and bending device.

(Function) The F2 part and the G part shown in Fig. 10 are removed using the front and rear elevating cutting blades with protruding blades, and the F1 part and the extension of F1 are removed using the left and right elevating cutting blades.

(Example) An example of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a perspective view of a metal plate punching and bending apparatus according to the present invention, FIG. 2 is a view taken along the line A-A in FIG. 1, and FIG. 3 is a view taken along the line B-B in FIG.

The punching and bending device 1 includes a punch 3 fixed to a fixed lower mold 2, a pad 5 for pressing downward a metal plate work 4 placed on the punch 3, and a work 4.
A front vertical punching blade 6 and a rear vertical punching blade (not shown) that extract the front and rear edges of the workpiece 4, and a left vertical punching and bending blade (not shown) and a right vertical punching blade (not shown) that punch and bend the left and right edges of the workpiece 4. A bending blade 7 is provided.

In this example, "front and rear" refers to the front and rear directions in FIG. 1, and "left and right" refers to the left and right directions in the same figure.

The pad 5 is suspended by a spring 9 from an elevating die 8 that can be raised and lowered freely, and has a curved surface corresponding to the punch 3 facing it.

The front vertical punching blade 6, the rear vertical punching blade, the left vertical punching and bending blade, and the right vertical punching and bending blade 7 are all attached to the vertical mold 8.

As shown in FIGS. 1 to 3, these blades form a substantially □ shape in plan view, with the end faces of the front and rear up-and-down cutting blades in contact with the back surfaces of the left and right up-and-down cutting blades.

At the left and right end portions of the lower surface of the front elevating punching blade 6, tapered projecting blade portions 6a are formed which project downward to a height approximately equal to the bending length of the workpiece 4. This protruding blade part 6a and the other horizontal blade part 6b form the lower surface of the front elevating cutting blade 6. The front elevating punching blade 6 is a lower blade portion 3 formed on the side surface of the punch 3.
The workpiece 4 is sheared by sliding in contact with a.

On the other hand, the right lifting/lowering bending blade 7 slides into contact with the lower right blade 10 erected from the fixed lower die 2 and shears the workpiece 4 .

The operation of the punching and bending device 1 having the above configuration will be explained below.

The lifting mold 8 is raised in advance, and the workpiece 4 press-formed in the previous step is placed at a predetermined position on the punch 3.

The lifting die 8 is lowered. First, the pad 5 comes into contact with the upper surface of the workpiece 4, and as the lifting die 8 descends, the pad 5 increases its pressing force under the action of the springs 9.

Subsequently, the front lifting/lowering punching blade 6 and the right lifting/lowering cutting blade 7
The operation will be explained with reference to FIG.

As shown in FIG. 4a, the front vertical punching blade 6 and the right vertical punching and bending blade 7 above the workpiece 4 are lowered.

The cutting edge 7a of the right lifting/lowering bending blade 7 comes into contact with the upper surface of the workpiece 4, and then cooperates with the lower right blade 10 to pull out the right edge of the workpiece 4. Furthermore, the right lifting/lowering bending blade 7
As shown in FIG. 4b, the lower surface portion 7b of the workpiece 4
Fold it downward.

The protruding blade part 6a of the front elevating cutting blade 6 comes into contact with the upper surface of the workpiece 4, and starts cutting out the front edge of the workpiece 4.
Then, as shown in FIG. 4c, the back surface 7c of the right vertical punching and bending blade 7 bends the right edge of the workpiece 4,
The protruding blade part 6a pulls out the front edge of this bent part,
Furthermore, the remaining part of the front edge of the workpiece 4 is cut into the horizontal blade part 6b.
is pulled out to complete the punching and bending process.

In this example, the rear vertical punching blade has the same structure and function as the front vertical punching blade 6, and similarly, the left vertical punching and bending blade has the same configuration and function as the right vertical punching and bending blade 7. .

FIG. 5 is a perspective view of another embodiment of the present invention, and FIG. 6 is a view taken along the line CC in FIG.

In contrast to the embodiment described in FIG. 1, this embodiment has the following:
The front lower blade 11 is set up in front of the punch 3, and the front vertical punching blade 6 is moved to the left and right to the position facing the blade part 11a of the front lower blade 11 (indicated by the imaginary line in FIG. 6). It was moved along the back side of the bending blade.

With this configuration, just by relocating the front elevating cutting blade 6 and the rear elevating cutting blade 6, it is possible to
It is possible to punch and bend four different sizes.

That is, the present invention provides protruding blades at the left and right ends of the front and rear lifting/lowering punching blades, thereby eliminating the part 110a in FIG. However, it is characterized in that the front and rear lifting and lowering punching blades can be moved along the back surface of the punching and bending blade.

It is also possible to process only two orthogonal sides or three consecutive sides of the workpiece 4 by removing the lifting punching blade or the lifting punching and bending blade from the apparatus of this example.

(Effects of the Invention) As explained above, according to the present invention, punched and bent metal plates with different dimensions in the front and rear directions can be easily produced, so that equipment costs can be reduced and work efficiency can be improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the punching and bending device according to the present invention, FIG. 2 is a view taken along the line A-A in FIG. 1, FIG. 3 is a view taken along line B-B in FIG. 1, and FIG. FIG. 5 is a perspective view of another device according to the present invention, FIG. 6 is a view taken along the line C-C in FIG. 5, FIG. 7 is a perspective view of the conventional device, and FIG. is the DD arrow view in Fig. 7, No. 9
The drawings are a view taken along the line E--E in FIG. 7, FIG. 10 is a diagram showing the metal plate before punching and bending, and FIG. 11 is a diagram showing the metal plate after punching and bending. In the drawings, 1 is a punching and bending device, 2 is a fixed lower mold, 3 is a punch, 3a is a lower blade part of the punch, 4 is a workpiece, 5 is a pad, 6 is a front elevating punching blade, 6a is a protruding blade part, 7 is a right lifting/lowering bending blade.

Claims (1)

[Claims for Utility Model Registration] A punch 3 on which a workpiece 4 is placed, a pad 5 that suppresses the workpiece 4 placed on the punch 3, and a pad 5 in sliding contact with a lower blade portion 3a formed on the side surface of the punch 3 in front of the workpiece 4, Before and after cutting the trailing edge, a lifting cutting blade 6, a lower blade 10 provided independently on the right and left sides of the punch 3, and a lower blade 10 in sliding contact with the left and right edges of the workpiece 4. After cutting, the lower blade part 3a on the punch 3 side
The left side of workpiece 4 slides into contact with the left side, the left side bends the right edge,
In a metal plate punching and bending device 1 comprising a right vertical punching and bending blade 7, tapered projections having a height approximately equal to the bending length of the workpiece 4 are provided at the left and right ends of the front and rear vertical punching blades 6. A metal plate punching and bending method characterized in that the blade part 6a projects downward, and the left and right end portions of the front and rear lifting punching blades 6 are brought into contact with the back surface 7c of the left and right lifting punching and bending blades 7. Device.