JP3167753B2 - Punch press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch press.

[0002]

2. Description of the Related Art For example, in order to perform burring on a plate material using a turret type punch press, first, a pilot hole is made with a punch, and then the turret is turned to remove a burring die. Match the prepared hole, insert the pin which is the lower mold of the burring mold into the prepared hole, and press around the prepared hole of the plate material with the upper die which is the upper mold of the burring mold. A cylindrical flange (burring) is formed upward.

[0003]

As described above, in the burring process, since the burring process is performed after the drilling process for drilling a prepared hole, the center of the burring mold is placed in the prepared hole. It is difficult to match exactly exactly. If this match is insufficient and the burring mold is displaced with respect to the prepared hole, and the upper die presses around the prepared hole of the plate material, the upper end surface of the cylindrical burring will face the plate material surface. It does not become parallel and the upper end surface part is inclined. In particular, when burring is processed at a plurality of locations, it becomes more difficult to accurately position the plate material at every feeding operation, and the degree of inclination of the upper end surface of the burring is likely to increase.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems and the like, and has been made by grasping a plate material to be processed at a punch position provided by a punch and a die provided in a punch press. In a punch press provided with a work clamp capable of being moved and positioned in the X-axis direction and the Y-axis direction, and having a plate holding device capable of holding the plate material on a table supporting the plate material, the plate holding device may be vertically moved. Outside the cylindrical portion provided at the lower portion of the flexible rod member, an outer cylindrical portion provided with a plate material pressing portion for pressing the plate material is provided so as to be vertically movable with respect to the cylindrical portion and provided by urging downward, A positioning pin provided in the cylindrical portion so as to be vertically movable and urged downward is provided so as to be freely fitted into a positioning pin hole previously formed in the plate material.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a front view of a turret type punch press, and FIG. 4 is a plan view of a main part thereof. The upper frame 1 has an upper turret 5 as an upper holder on which a number of punches 3 are arranged, and a lower turret 9 as a lower holder on which a die 7 corresponding to these punches 3 is arranged. Are supported rotatably around the turret shaft 11 in the vertical direction. Punch position P above upper turret 5
The upper frame 1 is provided with a ram 13 for pushing the punch 3 reaching the punch position P.

A center table 17 fixed to a lower frame 15 is provided on the front side of the upper turret 5 and the lower turret 9. A front side table 19 and a rear side table 21 are provided on the left and right sides of the center table 17. However, in FIG. 4, both directions are the left-right direction (Y-axis direction).
It is provided movably.

The front side table 19 and the rear side table 21 correspond to the vertical direction (X-axis direction) in FIG.
The carriage base 23 is integrally connected to the carriage base 23 provided long in the Y direction by the motor 25 together with the front side table 19 and the rear side table 21. A motor 27 is provided on the carriage base 23, and the carriage 29 is moved in the X-axis direction by a screw driven to rotate by the motor 27. A plurality of work clamps 31 for holding the plate material W are mounted on the carriage 29.

FIG. 1 is an enlarged longitudinal sectional view of a main part as viewed in the direction of arrow 1 in FIG. 3, and FIG. 2 is a plan view of the main part of FIG. Left and right plate holding devices 33 for holding the plate W on the center table 17 are provided on the upper frame 1 so as to sandwich the punch position P therebetween.

The original use of the plate holding device 33 is, for example, a plate W transferred to the front side table 19 by a plate transfer device (not shown) located on the right side.
Is held once by the work clamp 31 of the carriage 29 moved on the front side table 19, and when the carriage 29 further moves in the X-axis direction and the plate material W reaches the vicinity of the center table 17, the work clamp 3
1 is released, and the plate material holding device 33,
33 presses the plate material W against the center table 17, and carries the carriage base 23 and the carriage 29 for punching.
Is adjusted to a predetermined position, the plate material W is gripped again by the work clamp 31, and the pressing by the plate material pressing devices 33, 33 is released. Then, the carriage 29 moves in the X-axis and Y-axis directions and the predetermined position of the plate W is viewed at the punch position P, and the plate W is pressed by the plate pressing devices 33, 33 to perform a punching operation. I have.

In the embodiment illustrated in FIGS. 1 and 2, a positioning device M which uses a plate pressing device 33, 33 to accurately perform positioning during punching and burring (forming) processing. Provided.

The positioning device M in the illustrated example is a vertically movable piston rod 37 of a cylinder 35 of a plate material holding device 33.
, A cylindrical portion 41 is formed, and a hole 4 in a lower end surface portion of the cylindrical portion 41 is formed.
3 is urged downward by a spring 47 provided in the cylindrical portion 41, and the positioning pins 45 are tightly fitted into the left and right positioning pin holes 49, 49 previously drilled in the plate material W. It is configured to be able to.

The positioning pin holes 49, 49 are located in the X-axis direction, which is the direction in which the carriage 29 transports the plate material W.
Drilled at equal intervals from the punch position P, the positioning pin holes (pilot discard holes) 49, 49
When the positioning pins (pilot pins) 45 and 45 are closely fitted to each other, the positioning pin holes 49 and 49 are opened so that the position to be burred B is just below the punch position P. .

Since the plate holding device 33 has a function of pressing the plate W when the work clamp 31 is again gripped as described above, the outer cylindrical portion 50 is vertically moved by the cylindrical portion 41. The upper end surface 52 of the outer cylindrical portion 50 is engaged with the collar portion 51 formed on the cylindrical portion 41 when the piston rod 37 is moved upward. The formed plate material holding portion 53 and the cylindrical portion 4
The outer cylindrical portion 50 is urged downward by interposing a spring 55 between the lower cylindrical portion 1 and the lower end surface portion.

Although not shown in the drawings, when the workpiece clamp 31 is again gripped by the work clamp 31, the lower end surface of the positioning pin 45 is moved to the spring 47 by the downward movement of the piston rod 37, thereby causing the plate material pressing portion 53 to move through the spring 55. Through
Each of them is pressed against the upper surface of the plate material W.

In order to form a hole 57 for the burring B, in the illustrated example, a cylindrical portion 61 is externally fitted to a punch 59 so as to be movable up and down.
In the upward movement, the end surface 65 of the cylindrical portion 61 is locked, and the plate material holding portion 6 formed on the lower end surface of the cylindrical portion 61 is locked.
A spring 69 is interposed between 7 and the lower end surface of the cylindrical portion 61,
A die 71 is mounted on the lower turret 9.

The burring mold 73 illustrated in FIG. 5 includes an upper die 75 moved down by the ram 13, a pin 77 attached to the lower turret 9 to be inserted into the hole 57, and a plate material W. And a receiving plate member 81 urged upward by a spring 79 so as to abut on the lower surface.

Next, the operation of the above embodiment will be described. First,
A plate material W is formed by a not-shown drilling device (punching die).
Locating pin holes 49, 49 are drilled at predetermined positions.
Next, the plate material W gripped by the work clamps 31, 31 is X
When they are transferred in the axial direction and the positioning pin holes 49, 49 reach just below the plate holding devices 33, 33, the work clamps 31, 31 release the gripping, and the piston rods 37 of the cylinders 35 of the respective plate holding devices 33 are moved. By moving down, the positioning pin 45 is inserted into the positioning pin hole 49 and the spring 55
Is compressed, the plate material pressing portion 53 of the outer cylindrical portion 50 is pressed against the upper surface of the plate material W, whereby the plate material W is positioned at a predetermined position.

Then, the gripping by the work clamps 31 and 31 is performed again, and then the ram 13 is moved downward, and the punch 59 is moved.
The lower end of the cylindrical portion 61 is pressed against the upper surface of the plate W via the spring 69, and a hole (prepared hole) 57 is formed in the plate W by the punch 59 (FIG. 1). When there are a plurality of burrings B to be machined, such a boring operation is continuously performed a plurality of times.

When the upper turret 5 and the lower turret 9 are rotated in a predetermined manner after the drilling operation, the upper die 75 reaches just above the hole 57 and the pin 77 reaches just below the hole 57, respectively. Move down. As a result, the upper die 75 moves downward and strongly presses the periphery of the hole 57 of the plate material W downward, the plate material W slightly moves downward, the spring 79 is compressed, and the receiving plate 81 and the upper die 75 The peripheral portion of the hole 57 of the plate material W is drawn upward, and a burring B is formed at the peripheral portion of the hole 57 as shown in FIG.

As described above, during the burring process, the plate holding device 33 is inserted into the positioning pin holes 49 of the plate W.
Since the positioning pins 45, 45 are inserted and tightly fitted, the pin 77 of the burring mold 73 is correctly aligned with the hole 57 formed by the drilling process.
The burring B is accurately formed without any positional deviation or inclination of the upper end surface of the cylindrical portion with respect to the surface of the plate material W.

The positioning pin holes 49, 49 are formed such that the distances before and after the punching direction P in the transport direction are equal to each other.
And the close fitting insertion operation of each of the positioning pins 45, 45 are further facilitated.

In the above embodiment, since the positioning device M is formed by using the cylinder 35 of the plate holding device 33 already provided in the punch press, the positioning device M is
It can be implemented simply and at low cost.

The reference example shown in the front view of the main part shown in FIG.
Plate holding devices 85, 85 already provided in the punch press
In addition, positioning devices N, N having the same structure as the embodiment of FIG. 1 are provided.

The reference example shown in the front view of the main part in FIG. 7 is provided with positioning devices N, N having the same structure as that of the embodiment of FIG. 1 next to the punch 3 of the upper turret 5 of the punch press. Yes, as in these embodiments, the positioning device may be of various types such as its installation position.

[0025]

As will be understood from the above description of the embodiment, in the present invention, the plate holding device 33 for holding the plate W on the table has a plate holding portion 53 for holding the plate W. The cylindrical part 4 in which the outer cylindrical part 50 is movable up and down.
A positioning pin 45 is provided on the cylindrical portion 41 so as to be vertically movable and capable of being fitted into a positioning pin hole 49 pre-processed in the plate material W. In the case where positioning pin holes 49 have been formed in the plate material W in advance, the plate material W is biased toward the outer cylindrical portion in a state where the positioning pins 45 are engaged with the positioning pin holes 49 and positioned. The plate 50 can be pressed and fixed to the table, and the processing position of the plate material W can be more accurately positioned with respect to the punch position P by the punch 3 and the die 7. Further, even when the gripping position of the plate material W by the work clamp 31 is changed, the plate material W can be accurately pressed and fixed without moving.

Further, when the positioning pin hole 49 is not formed in the plate W in advance, the plate W can be pressed and fixed to the table by the plate pressing portion 53 of the outer cylindrical portion 50 and the tip of the positioning pin 45. You can do it.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a vertical cross section of a main part as viewed from an arrow I in FIG. 1 showing a punch press to which an embodiment of the present invention is applied.

FIG. 2 is a plan view of a main part of FIG.

FIG. 3 is a front view showing a punch press to which the embodiment is applied.

FIG. 4 is a plan view of a main part of FIG. 3;

FIG. 5 is an enlarged view of a longitudinal section of a main part showing a burring process in the embodiment of FIG. 1;

FIG. 6 is a front view of a main part showing a reference example.

FIG. 7 is a front view of a main part showing a reference example.

[Explanation of symbols]

 31 Work clamp 45 Positioning pin (pilot pin) 49 Positioning pin hole (discard hole for pilot) P Punch position M, N Positioning device W Plate

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B21D 43/00 B21D 19/08 B21D 28/36 B21D 43/04

Claims (1)

(57) [Claims] 1. A sheet material (W) to be processed is gripped with respect to a punch position (P) by a punch (3) and a die (7) provided in a punch press, and can be moved and positioned in an X-axis direction and a Y-axis direction. A work clamp (31), and a plate press (33) capable of pressing the plate (W) against a table supporting the plate (W). ), An outer cylindrical portion (50) having a plate material holding portion (53) for holding a plate material (W) is provided outside the cylindrical portion (41) provided below the vertically movable rod member (37). The positioning pin (45) provided vertically movably and downwardly urged in the cylindrical portion (41) is provided so as to be vertically movable with respect to (41). Positioning pin holes (49 A punch press characterized in that the punch press is provided so as to be freely fitted to the punch press.