JPH0235370Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application This invention relates to a plate bending machine that bends the edge of a plate.

b. Prior Art As a bending machine for bending a plate material, a ram equipped with a top die that presses and fixes the plate material to a bottom die extending in the left and right direction is provided so as to be movable up and down, and the plate material is pressed and fixed by the bottom die and the top die. A bending die for bending upward the protruding portion of the plate material protruding from the bottom die and the top die is slidably guided by the inclined surface of a guide member provided on the ram facing the top die and is movable upward. There is a sheet material bending machine that is configured to be movable toward the top die side.

The sheet material bending machine with the above configuration has two types: one in which the bending die moves linearly and is displaced toward the top die, and the other in which the bending die oscillates, as shown in Japanese Patent Application Laid-Open No. 59-202120. There is also a type in which it is displaced toward the top die side.

c Problems to be solved by the invention In the above-mentioned sheet material bending machine, in the configuration in which the bending die swings, the contact between the bending die and the inclined surface of the guide member is always kept in surface contact. There is a problem in that it is difficult to suppress the contact surface pressure to a low level.

This idea was made in view of the problems mentioned above.

d Means to solve the problem In order to solve the conventional problem as mentioned above,
This invention includes a vertically movable ram equipped with a top die that presses and fixes a plate material to a bottom die extending in the left-right direction, and a bending die that bends the protrusion of the plate material upward from the bottom die and the top die. A sheet material bending machine is provided that is slidably guided by an inclined surface of a guide member provided on a ram facing the top die so as to be movable upward and swingable toward the top die, A surface contact rotating member having a substantially semicircular cross-sectional shape and having a surface contact portion that makes surface contact with the guide member is rotatably provided at a portion where the mold slides into contact with the guide member.

e Effect With the above configuration, when the bending die is raised to bend the plate, the bending die moves upward along the inclined surface of the guide member and bends the edge of the plate upward. At this time, the surface contact rotating member rotatably provided on the bending die is in surface contact with the inclined surface of the guide member, and even when the bending die swings, the surface contact rotating member By rotating, surface contact is always maintained.

f Example Next, an example of this invention will be described based on the drawings. The bending machine 1 shown in FIGS. 1 and 2 has a center line 5 (a second
A bottom die 7 is provided horizontally and symmetrically with respect to the bottom die (see figure).

Above the bottom die 7, a ram 11 is provided which is moved up and down by a hydraulic cylinder 9 attached to the left and right side walls of the machine frame 3 (see FIG. 1). A top die 13 corresponding to the bottom die 7 is attached to the lower surface of the ram 11.

Plate material 15 as a workpiece to be bent
is fixed between the bottom die 7 and top die 13, protruding toward the center line 5 by the width to be bent.

At the center of the lower surface of the ram 11 described above, a columnar protruding member 17 as shown in FIG.
is provided so that its position can be adjusted up and down.

Between the bottom die 7 and the guide member 19,
A bending die 21 is provided, a fluid cylinder 23,
The eccentric device 25 swings vertically.

In the above explanation, the plate material 15 is
The plate material 15 is placed on top of the plate material 15 by the top die 13.
When the top die 13 is pressed and fixed, the width of the top die 13 that protrudes from the bending line edge 27 (see FIG. 3) toward the center line 5 becomes the bending dimension.

In this invention, a plurality of sliding members 29 are provided on the upper rear surface of the bending die 21 (see FIG. 3) in a direction perpendicular to the plane of the paper. The sliding member 29 is
A surface contact rotating member 31 having a semicircular cross-sectional shape and having a surface contact portion that makes surface contact with the inclined surface of the guide member 19
The support part 33 is fixed to the bending mold with a mounting bolt 35, and the surface contact rotating member 31 is attached to the support part 33 with a bolt 37. . Since the mounting hole 39 provided in the surface contact rotating member 31 is made sufficiently larger than the outer diameter of the mounting bolt 37, the surface contact rotating member 31 can rotate relative to the bending die 21.

The lower part A of the bending die (see FIG. 3) is provided with a pusher 4 provided on the machine frame 3 so that the sliding member 29 always slides in contact with the guide member 19.
The roller 43 of No. 1 is always pressed to the right by a spring 45.

With this configuration, when fluid pressure is supplied to the fluid pressure cylinder 23, the bending die 21 is raised by the eccentric device 25, and the plate material 15 protrudes to the right from the bend line edge 27 of the top die 13. is bent upwards. The bending die 21 tilts to the left while rising, but the sliding member 29 provided on the bending die
The plane portion of the surface contact rotating member 31 is connected to the guide member 19
Always maintain face-to-face contact. Therefore, since the surface pressure is reduced, it becomes possible to bend thick plates.

In this embodiment, the sliding member provided on the back of the bending die slides along the guide member provided on the ram, but without using the guide member,
By rotating the bending mold (bending beam),
This idea can also be applied to a bending machine that bends plate materials. That is, in this case, this sliding member 29 is placed on the surface where the bending die contacts the workpiece.
All you have to do is set it up.

The rotating portion of the sliding member 29 has a structure similar to that of a spherical bearing, but may also have a structure similar to that of a cylindrical bearing.

g. Effects of the invention As can be understood from the above description of the embodiments, in short, the present invention allows the ram 11 equipped with the top die 13 that presses and fixes the plate material 15 to the bottom die 7 extending in the left-right direction to be movable up and down. A bending die 21 is provided to bend the protruding portions of the plate material 15 protruding from the bottom die 7 and the top die 13 upward.
is slidably guided by the inclined surface of a guide member 19 provided on the ram 11 facing the top die 13 so as to be movable upward and swingable toward the top die 13 side. A surface contact rotating member 31 is provided with a surface contact portion having a substantially semicircular cross-sectional shape and surface contacting with the guide member 19 at a portion where the bending die 21 slides on the guide member 19.
is rotatably provided.

As is clear from the above description, in the present invention, the portion where the bending die 21 comes into sliding contact with the guide member 19 has a substantially semicircular cross-sectional shape and the guide member 19
Surface contact rotating member 3 equipped with a surface contact portion that makes surface contact with
1 is rotatably provided, the surface contact pressure between the guide member 19 and the surface contact rotating member 31 can be reduced, and the surface contact rotating member 31
By being rotatable, surface contact between the inclined surface of the guide member 19 and the surface contact rotating member 31 can always be ensured even when the bending die 21 swings.

[Brief explanation of the drawing]

Figure 1 is a front view of the bending machine that implemented this invention, Figure 2 is a left side view, and Figure 3 is a
It is an explanatory diagram of this idea. Explanation of symbols representing main parts in the drawings, 1...
...Bending machine, 7...Bottom die, 11...Ram, 13...Top die, 19...Guiding member, 2
DESCRIPTION OF SYMBOLS 1... Bending die, 25... Eccentric device, 29... Sliding member, 31... Surface contact rotating member, 33... Supporting part, 41... Pusher.

Claims (1)

[Scope of utility model registration request] A ram 11 equipped with a top die 13 that presses and fixes a plate material 15 to a bottom die 7 extending in the left-right direction is provided so as to be movable up and down, and a bending die that bends the protruding portion of the plate material 15 that protrudes from the bottom die 7 and the top die 13 upward. A plate bending method in which a mold 21 is slidably guided by an inclined surface of a guide member 19 provided on a ram 11 facing the top die 13 so as to be movable upward and swingable toward the top die 13 side. A processing machine rotates a surface contact rotating member 31 having a substantially semicircular cross-sectional shape and a surface contact portion that makes surface contact with the guide member 19 at the portion where the bending die 21 slides into contact with the guide member 19. A sheet material bending machine characterized by being freely movable.