JP2001121213A - Die provided with work holding mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die provided with work holding mechanism which can bend a work end side and portions other than the end side by using one kind of the die without changing any die. SOLUTION: In a bending machine to bend a work such as a plate, a work holding mechanism 3 is provided in a vertically movable manner at a desired position of one an upper die 1 or a lower die 2, and the work end side and portions other than the end side can be bent by the same die.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold having a work holding mechanism in a bending machine.

[0002]

2. Description of the Related Art When a product having a shape as shown in FIG. 5 (c) is manufactured, two types of dies are usually required: a die for processing both ends and a die for processing portions other than both ends. It is.

[0003] Therefore, when machining is performed by one machine, it is necessary to perform a mold exchanging operation by hand or an ATC (automatic mold exchanging device).

[0004]

However, in the above-mentioned conventional example, there are problems such as an increase in the burden on the operator, an increase in cost due to the installation of the ATC, and an increase in the work time associated with the mold replacement work.

The present invention has been made in view of the above-mentioned circumstances, and does not require the exchange of a mold, and enables a single type of mold to bend a work end and a portion other than the end. An object of the present invention is to provide a mold with a holding mechanism.

[0006]

The present invention can solve the above-mentioned problems by providing the following constitution.

(1) In a bending machine for bending a work such as a plate material, a work holding mechanism is provided at a desired position of one of an upper die and a lower die so as to be vertically movable, and a work end is formed by the same die. A mold with a work holding mechanism, characterized in that a part other than the side and the end side can be bent.

(2) The work holding mechanism has a drive unit,
It is reciprocally movable, and includes a work contact portion connected to the drive portion via a connection member. When not in use, the work contact portion is immersed in a mold and contacts a work contact surface of the mold. The mold with the work holding mechanism according to the above (1), wherein the mold can be stored by forming the same surface.

(3) The work holding mechanism according to the above (1), wherein at least one or more work holding mechanisms are provided in the vicinity of one of the edges of the upper mold or the lower mold. Mold with mechanism.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below.

FIG. 1 is a vertical sectional side view showing a main part of a mold having a work holding mechanism according to the present invention, FIG. 2 is a partial vertical side view showing an operation of the work holding mechanism, and FIGS.
(B), (c) is an explanatory view showing an operation state at the time of bending the edge of the work, FIG. 4 is a longitudinal side view showing a state at the time of full-length forming of the work, and FIGS. 5 (a), (b), (C) is an explanatory side sectional view showing a procedure of bending a work.

An embodiment of the present invention will be described with reference to the drawings.

In this embodiment, a case in which a work holding mechanism 3 is provided on an upper mold (punch) 1 will be described.

The upper table (ram) Tu can be moved up and down by a hydraulic cylinder, a motor or the like (not shown). At the lower end of this upper table (ram) Tu, an upper mold (punch)
1 is vertically suspended and opposed to a lower die (die) 2 mounted on the lower table Tl so as to be engageable with the lower die (die) 2. As shown in FIGS. 1 to 4, a driving portion 3a such as a cylinder and a work contact portion 3b connected to the driving portion 3a via a connecting portion are provided near an edge portion of the upper mold (punch) 1.
2, the work contacting portion 3b of the work holding mechanism 3 has a work contact surface of the upper die (punch) 1 when the cylinder is operated (when it is ON), as shown in FIG. 1
a of the work W inserted and positioned between the lower die (die) 2 and the work contact surface 2a of the lower die (die) 2 from above, pressed and fixed in position, and used as a so-called "plate holder". When working on a part other than both ends, the cylinder is reversely operated (turned off) and the workpiece contact portion 3 is placed in the upper die (punch) 1.
b is stored so as to be stored.

The operation will be described based on the above configuration.

<Work edge processing> FIG. 3 (a),
This will be described below with reference to (b) and (c).

In FIG. 3 (a), the drive unit (cylinder) 3a of the work holding mechanism 3 is actuated (turned on), and the work contact part 3b is moved downward so that the work contact of the upper die (punch) 1 is stopped. The upper table Tu is lowered while the workpiece W is projected from the contact surface 1a, and the work W is moved to the lower table Tl.
Is positioned and pressed between the lower dies (dies) 2 mounted on the dies. Next, as shown in FIG. 3 (b), when the upper table Tu further continues to descend, the work contact portion 3b is pushed up, and the driving portion 3a formed by a cylinder receives a force for pushing up the work contact portion 3b. As a result, the entire work holding mechanism 3 assumes a compressed state, and the work contact portion 3b starts to sink into the upper die (punch) 1 fixedly mounted on the upper table (ram) Tu. The upper table (ram) Tu continues to bend the end of the work while pressing and fixing the work W at the work contact portion 3b.

As the upper table (ram) Tu descends, the work contact portion 3b is completely immersed (entered) in the upper die (punch) 1 (see FIG. 3C). The lowering of the ram) Tu stops, and the bending operation of the end of the work ends.

<Full Length Forming Process> FIG. 4 shows the state of the full length forming process other than the edge processing of the work W. In this full length forming process, the work holding mechanism 3 is not operated and the work contact portion 3b is operated. Is stored in the upper die (punch) 1 suspended and fixed to the upper table (ram) Tu (with the workpiece contact portion 3b turned off), and the upper table (ram) T
As u moves down, full-length forming is performed.

That is, as shown in FIG. 5, first, the edge processing of (a) is performed, then the full-length forming processing of (b) is performed, and finally the remaining edge processing is performed, as shown in (c). Processing as a product is completed.

In the embodiment, the case where the work holding mechanism is provided on the upper mold is described. However, it is of course possible to provide the work holding mechanism on the lower mold according to various conditions.

[0022]

According to the present invention, since the work holding mechanism is provided, it is not necessary to replace the mold, and the end of the work and a portion other than the end are bent by one type of mold, that is, the entire length. Forming is also possible, and the press-fixing action of the workpiece abutment prevents "displacement" during the processing of the workpiece, resulting in improved product accuracy, and further eliminates the need for mold replacement. In addition, when a layout that does not require the ATC is possible by reducing the burden on the worker, shortening the work time, and the like, the effects such as cost reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a main part configuration of a mold with a work holding mechanism according to the present invention.

FIG. 2 is a partially longitudinal side view showing an operation of a work holding mechanism.

FIGS. 3A, 3B, and 3C are explanatory diagrams showing an operation state at the time of bending a work edge.

FIG. 4 is a longitudinal sectional side view showing a state of a full-length forming process of a work.

5 (a), (b), and (c) are side sectional explanatory views showing a procedure for bending a work.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Upper die (punch) 1a Work contact surface 2 Lower die (die) 2a Work contact surface 3 Work holding mechanism 3a Drive unit (cylinder) 3b Work contact portion Tu Upper table Tl Lower table W Work

Claims (3)

[Claims] In a bending machine for bending a work such as a plate material, a work holding mechanism is provided at a desired position of one of an upper die and a lower die so as to be movable up and down, and the end of the work is formed by the same die. A die with a work holding mechanism, wherein a portion other than the end side is configured to be bent. 2. The work holding mechanism has a drive unit, is reciprocally movable, and includes a work contact unit connected to the drive unit via a connection member. 2. The mold with a work holding mechanism according to claim 1, wherein the mold is immersed in the mold to form and store the same surface as the work contact surface of the mold. 3. The work holding mechanism according to claim 1, wherein at least one or more work holding mechanisms are provided in the vicinity of one of the edges of the upper mold or the lower mold. Mold.