JP2545176B2 - Mold for punching machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching die for a punching machine, and more particularly to a punching die for a punching machine which can cope with a change in plate thickness to be processed.

[0002]

2. Description of the Related Art In a conventional punching machine such as a turret punch press, it is general to use a molding die corresponding to each plate thickness of a work to be processed.

For this reason, it has been common to prepare molding dies for various plate thicknesses and perform molding.

[0004]

However, in such a conventional technique, when the plate thickness of the workpiece to be processed changes, a molding die corresponding to the plate thickness is required, so various types of molds are required. There is a problem in terms of cost because a molding die for the plate thickness is required.

Further, the molding die has to be replaced every time the plate thickness changes, resulting in poor workability.

The object of the present invention has been made by paying attention to such a conventional technique. Even if the plate thickness of the workpiece to be machined is changed, if the product has the same shape, the molding process is carried out by the same die. The present invention provides a molding die for a punching machine capable of performing the above.

[0007]

In order to achieve the above object, a molding die of a punching machine according to the present invention is a punching machine for punching by a punch and a die provided opposite to each other. The punch body mounted on the punch is provided with a concave portion for forming and forming an inclined surface inside the concave portion, and a die chip fitted in the concave portion is provided on the die so as to be movable in the horizontal direction and the punch is formed. The inclined surface is provided on the die chip facing the inclined surface of the body.

The inclined surface formed in the concave portion at the tip of the punch body is composed of two inclined surfaces having different inclinations, and the inclined surface formed on the die chip has the same inclination as the inclined surface of the concave portion of the punch body. It is desirable to form it from.

[0009]

According to the molding die of the punching machine of the present invention, the die chip provided in the die is fitted into the recess for molding provided at the tip of the punch body mounted on the punch. Molding is performed by. On this occasion,
As the punch descends, the inclined surface of the concave portion of the punch body and the inclined surface of the die chip come into contact with each other, and the die chip rises relatively while moving in the horizontal direction with respect to the die. Even if the horizontal movement amount of the die chip is changed, the forming process can be performed regardless of the plate thickness.

Since the concave portion and the inclined surface formed on the die chip are in two steps, the die chip can be moved smoothly.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 10 shows a turret punch press 1 as a punching machine. This turret punch press 1 has side frames 5 and 7 on both sides of a base 3.
And an upper frame 9 is provided above the side frames 5 and 7.

On the lower surface of the upper frame 9, a disk-shaped upper turret 13 to which punches 11 as a plurality of upper dies (here, upper dies for molding) are detachably mounted.
Are rotatably supported by the upper rotary shaft 15. On the upper surface of the base 3 facing the upper turret 13, a lower turret 19 to which a plurality of lower mold dies 17 that are paired with the punch 11 is detachably mounted is rotatably supported by a lower rotary shaft 21. It is supported. A ram 25 equipped with a striker 23 that strikes the upper mold 11 is provided below the upper frame 9.

Therefore, the upper turret 13 and the lower turret 19 are rotationally controlled in synchronism with each other by a turret servomotor (not shown) provided in the frame, and a desired pair of punch 11 and die 17 is directly below the striker 23. Positioning is selectively controlled at the processing position.

Further, a fixed table (not shown) is provided at the center of the upper surface of the base 3, and a pair of movable tables 27 whose positioning is controlled along the Y direction in the drawing are movably provided on both left and right sides of the fixed table. It is supported. The movable table 27 is integrally equipped with a carriage base 29 that extends in the front-rear direction (the direction perpendicular to the paper surface in FIG. 10) while straddling the fixed table. Also,
Inside the carriage base 29, a carriage 31 that is movable in the front-rear direction is installed. This carriage 3
1 is equipped with a work clamp 33 that holds one end of a plate-shaped work W so as to be movable in the X direction.

Therefore, for positioning the work W between the upper turret 13 and the lower turret 19, the carriage 31 equipped with the work clamp 33 for gripping the work W moves forward and backward on the carriage base 29 (at right angles to the paper surface in FIG. 10). Direction) and the carriage base 29 is controlled to move in the Y direction.

The work W positioned in this way
Is formed by a predetermined punch 11 and die 17 selected by rotating and positioning the upper turret 13 and the lower turret 19.

Next, the molding die 35 will be described with reference to FIG. The molding die 35 includes a punch 11 as an upper die and a die 17 as a lower die. The punch 11 and the die 17 are respectively the upper and lower turrets 13, 1.
It is attached to 9. The punch 11 has bolts 39, 41 below the punch head 37 that is hit by the hitting element 23.
The punch body 45 is attached via the attachment member 43, and the tip of the punch body 45 (the lower end in FIG. 1) is formed with a recess 47 for molding.

The right end portion 49 of the punch body 45 located on the right side of the recess 47 in FIG. 1 projects below the left end portion 51 of the recess 47 located on the left side in FIG. Further, referring also to FIG. 2, the right inner wall of the recess 47 has a first inclined surface 55 and a second inclined surface 57 formed in two steps on the lower side of the vertical surface 53 in FIG. The second inclined surface 57, which is the side, has a stronger inclination (that is, closer to vertical) than the upper first inclined surface 55.

A punch ejector 61 is vertically movable in an internal space 59 of the punch body 45, and an ejector spring 63 for constantly urging the punch ejector 61 downward is provided above the punch ejector 61. ing. Therefore, the work W that has entered the recess 47 by the molding process can be pushed out from the punch body 45.

On the other hand, the die 17 provided on the lower side facing the punch 11 is provided with a die chip 65 having a predetermined shape for fitting into the recess 47 of the punch body 45 and performing a forming process. An ejector plate 67 is provided around the die chip 65. The ejector plate 67 is provided above the urethane spring 71 via a plurality of stripper bolts 69 and is vertically movable. The ejector plate 67 is for removing the work W from the die 17 after the forming process by the repulsive force of the urethane spring 71. Is.

Referring to FIGS. 3 and 4 together, the ejector plate 67 is provided with a notch 73 having a width corresponding to the width of the die chip 65 in the vertical direction in FIG. The die chip 65 is provided so as to be movable in the vertical direction in FIG. 4 (the horizontal direction in FIG. 1), and the die chip ejector 75 provided on the left side of the die chip 65 in FIG.
Is always urged in the right direction by and is pressed against the die chip guide 77 provided on the right side of the die chip 65.

A base 7 is provided below the die chip 65.
9 and protrudes upward in FIG. 4 (rightward in FIG. 1). Since the die chip guide 77 presses the base 79 slidably, the die chip 65 is allowed to move in the left-right direction, but is prevented from moving in the up-down direction. Therefore, the die chip 65 does not fall off the die 17.

Between the right side of the die chip 65 and the ejector plate 67, the right end portion 49 of the punch body 45 is provided.
Is provided with a space 81 in which is fitted. Then, referring also to FIG. 2, at the right corner of the upper end of the die chip 65, the first inclined surface 55 of the recess 47 of the punch body 45 described above.
The first inclined surface 83 is provided with the same gradient as. The length of the first inclined surface 83 on the die chip 65 side is equal to the punch body 4
It is slightly shorter than the length of the first inclined surface 55 on the fifth side, and the second inclined surface 85 is provided from the lower end portion of the first inclined surface 83 at the same slope as the second inclined surface 57 on the punch body 45 side. ing. Therefore, the first inclined surface 83 on the die chip 65 side
When the slides on the first inclined surface 55 on the punch body 45 side to some extent, the slide does not slide any more from the viewpoint of safety.

With the above structure, when the punch 11 is lowered, the die chip 65 is moved to the punch body 4.
The second inclined surface 57 on the side of the punch body 45 and the second inclined surface 85 on the side of the die chip 65 come into contact with each other. When the punch 11 is further lowered, the die chip 65
The second inclined surface 85 on the side slides along the second inclined surface 57 on the punch body 45 side, and as a result, the die chip 65 moves to the left side in FIG. Will rise.

Next, the molding process will be described with reference to FIGS. As shown in FIG. 5, as the punch 11 is lowered, first, the right end 49 of the punch body 45 guides the die chip 65 and descends to guide the die chip 65 into the recess 47 of the punch body 45, and the punch body 45 is moved. The work W is sandwiched between the left end portion 51 and the ejector plate 67 of the die 17. When the punch 11 is further lowered, as shown in FIG. 6, the left end portion 51 of the punch body 45 pushes down the ejector plate 67 on the die 17 side, and the second inclined surface 85 of the die chip 65 makes the second inclination of the punch body 45. It gradually moves to the left side in the figure along the surface 57. At this time, the die chip 65 is relatively punch 1
Therefore, the work W is gradually pushed and bent upward while pushing up the punch ejector 61. The final state of such molding is shown in FIG.

When the forming process is completed and the punch 11 is lifted, the die chip 65 is pushed back to the right by the die chip ejector 75 to be in the initial state.

In such a forming process, the die chip 65 moves to the left side according to the plate thickness of the work W as the punch 11 descends, but as shown in FIG. The left side surface of the die chip 65 and the punch body 45 when 85 moves upward along the second inclined surface 57 of the punch body 45 to start pushing and bending the work W.
A gap G1 between the concave portion and the inner surface on the left side corresponds to the maximum plate thickness of the work W that can be formed. Further, as shown in FIG. 9, a gap G2 between the left side surface of the die chip 65 and the left side inner surface of the recess 47 in the punch body 45 when the die chip 65 is raised to the limit corresponds to the minimum plate thickness of the work W that can be formed. .

As described above, as the punch body 45 descends, the inclined surface of the die chip 65 slides along the inclined surface of the recess 47 of the punch body 45, so that the die chip 65 relatively moves while moving to the left. Then, the molding process is performed. Therefore, even if the plate thickness of the work W to be processed changes, the movement amount of the die chip 65 to the left side changes to cope with the change. Therefore, the work W having various plate thicknesses can be formed by using one type of molding die 35. Therefore, it is not necessary to replace the punch 11 and the die 17 even if the plate thickness changes as in the conventional case.

Further, the recess 47 in the punch body 45.
Since the inner inclined surface and the right inclined surface of the die chip 65 have a two-step structure, the die chip 65 can be moved smoothly.

The present invention is not limited to the above-mentioned embodiments, but can be implemented in various modes by making appropriate changes. For example, in the above embodiment, the case where the turret punch press 1 is used has been described, but the present invention is not limited to this and can be applied to various punching machines.

[0032]

The molding die of the punching machine according to the present invention is constructed as described above, and the die for forming is formed in the concave portion for molding which is provided at the tip of the punch body attached to the punch. Molding is performed by fitting the die chip provided in the. At this time, as the punch descends, the inclined surface of the punch body concave portion and the inclined surface of the die chip come into contact with each other, and the die chip moves upward relative to the die while moving horizontally. Even if the value changes, only the horizontal movement amount of the die chip changes, and the forming process is performed regardless of the plate thickness. Therefore, it is not necessary to replace the molding die each time the plate thickness changes, as in the conventional case.

Since the concave surface and the inclined surface formed on the die chip are in two stages, the die chip can be moved smoothly.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an entire molding die of a punching machine according to the present invention.

FIG. 2 is an enlarged view of a portion indicated by an arrow II in FIG.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a plan view of the die seen from line IV-IV in FIG.

FIG. 5 is an enlarged explanatory view of a portion indicated by an arrow II in FIG. 1 showing a state where a molding process is started.

FIG. 6 is an enlarged explanatory view of a portion indicated by an arrow II in FIG. 1 showing a state during the forming process.

FIG. 7 is an enlarged explanatory view of a portion indicated by an arrow II in FIG. 1 showing a state at the end of molding processing.

FIG. 8 is an explanatory view showing a state of forming and processing a work having the maximum plate thickness.

FIG. 9 is an explanatory view showing a forming processing state for a work having the minimum plate thickness.

FIG. 10 is a front view showing the whole turret punch press using the molding die according to the present invention.

[Explanation of symbols]

 1 Turret Punch Press (Punching Machine) 11 Punch 17 Die 35 Molding Die 45 Punch Body 47 Recessed 55 Punch Side First Inclined Surface 57 Punch Side Second Inclined Surface 65 Die Chip 83 Die Side First Inclined Surface 85 Die Side Second Slope

Claims (2)

(57) [Claims] 1. A punching machine for punching using a punch and a die provided to face each other, wherein a punching body mounted on the punch is provided with a recess for forming and is inclined inside the recess. A die for forming a punching machine, characterized in that a surface is provided, a die chip that fits into the recess is provided on the die so as to be movable in the horizontal direction, and an inclined surface is provided on the die chip facing the inclined surface of the punch body. . 2. The inclined surface formed in the concave portion at the tip of the punch body is composed of two inclined surfaces having different slopes, and the inclined surface formed on the die chip is the same slope as the inclined surface of the concave portion of the punch body. The molding die for a punching machine according to claim 1, comprising: