JPH0641915U - Punch set - Google Patents

Abstract

(57) [Abstract] [Purpose] Prevents punch members from rattling in the radial direction with respect to the holder, reduces wear on the fitting part between the punch member and holder, and improves machining accuracy over a long period of time. To maintain and improve the durability life of punch members and holders. In a punch set in which a punch member 13 is axially movably fitted into a punch support hole 3 formed in a holder 1, and the punch member 13 is movably supported by the holder 1, a punch of the punch member 13 is provided. A linear rolling bush 15 is attached to the fitting portion with respect to the support hole 3, and the punch member 13 is attached.
Is guided by the linear rolling bush 15 and moved in the axial direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a punch set, and particularly to a punch set used for bending work and the like.

[0002]

[Prior art]

 The punch set includes a laterally U-shaped holder, a punch member attached to the holder, a punch retainer that supports the punch member, and a die member. The die member is fixed to the holder. Alternatively, the punch retainer is fitted in a punch support hole formed in the holder so as to be movable in the axial direction, and is movably supported by the holder.

[0003]

[Problems to be solved by the device]

 Since the punch member or the punch retainer slide-fits in the punch support hole and moves in the axial direction with respect to the holder in the slip-fitted state, the punch member or punch retainer causes radial rattling with respect to the holder. This rattling causes a decrease in processing accuracy.

Further, due to the sliding of the outer peripheral surface of the punch member or the punch retainer and the inner peripheral surface of the punch support hole, the wear of these peripheral surfaces becomes a problem, and this wear causes a radial rattling of the punch member with respect to the holder. This will increase the stickiness and deteriorate the processing accuracy. Therefore, this wear accelerates the replacement time of the punch member, the punch retainer, and the holder for maintaining the machining accuracy, and shortens the durable life of the punch member, the punch retainer, and the holder.

The present invention has been made in view of the above-mentioned problems in the conventional punch set, and avoids rattling of the punch member and the punch retainer with respect to the holder in the radial direction, and An object of the present invention is to provide a punch set capable of reducing wear of the punch member, the fitting portion of the punch retainer and the holder, maintaining machining accuracy for a long period of time, and improving the durable life of the punch member, the punch retainer and the holder. I am trying.

[0006]

[Means for Solving the Problems]

 According to the present invention, the punch member or the punch retainer is axially movably fitted to the punch supporting hole formed in the holder, and the punch member or the punch retainer is movably supported by the holder. In this punch set, a linear rolling bush is attached to a portion of the punch member or punch retainer that fits into the punch support hole, and the punch member or punch retainer is guided by the linear rolling bush. Achieved by a punch set characterized by being configured to move axially.

[0007]

[Action]

 According to the above-mentioned structure, the punch member or the punch retainer is guided by the linear rolling bush and moves in the axial direction in the rolling relationship with respect to the holder.

[0008]

【Example】

 Embodiments of the present invention will be described below in detail with reference to the drawings.

1 and 2 show an embodiment of a punch set according to the present invention. In these drawings, reference numeral 1 denotes a horizontal U-shaped holder 1. The holder 1 has a punch support hole 3 which is a through hole in an upper arm 1a and a bottomed die holding hole 5 in a lower arm 1b. Have each.

A punch assembly 7 is fitted and mounted in the punch support hole 3. The punch assembly 7 includes a punch member 13 including a punch body 9 for L-shaped bending and a shaft-shaped portion 11, and a linear rolling bush fitted and mounted on the outer periphery of the shaft-shaped portion 11 of the punch member 9. It is composed of a linear stroke bearing 15.

The linear stroke bearing 15 has an outer sleeve 17 and a plurality of balls 19 rotatably mounted on the inner peripheral surface of the outer sleeve 17, and the ball 19 is a shaft portion of the punch member 13. A ball receiving groove 21 formed in the outer peripheral surface of the shaft 11 in the axial direction is rotatably engaged to support the punch member 13 in the axial direction, that is, in the vertical direction.

A punch head 23 is fixedly attached to the upper end of the shaft-like portion 11 of the punch member 13, and a spring retainer is provided between the punch head 23 and the upper end surface of the outer sleeve 17 of the linear stroke bearing 15. A compression coil spring 29 is attached via 25 and 27.

The punch member 13 having the punch head 23, the linear stroke bearing 15, and the compression coil spring 29 are handled as one united punch assembly 7, and the punch assembly 7 has an outer circumference of the outer sleeve 17. The outer sleeve 17 is removably fitted and inserted into the punch support hole 3 in a state where the key 29 attached to the portion is engaged with the key groove 31 in the punch support hole 3, whereby the holder 1 Is exchangeably attached to the holder 1 and is fixed to the holder 1 by the set screw 33.

A die holder 35 is fixedly attached to the die holding hole 5, and a die member 37 is exchangeably attached to the die holder 35 with a click ball 39.

The die member 37 is composed of a cubic block, has only one surface thereof as a flat surface, and has V-shaped die grooves 41 on the other three surfaces, and a click ball is formed on each surface. Since the engaging groove 43 of 39 is provided, the mounting attitude can be changed so that each surface is selectively the upper surface.

The holder 1 is fixedly mounted on a base member 45, and the base member 45 is guided by a nearer guide rail 49 of a base 47 and is movably engaged in a direction penetrating the paper surface of FIG. The base 47 is fixedly attached to the lower table 51 of the press machine.

In the punch set having the above-described structure, the punch head 23 is pressed downward by a striker (not shown) so that the punch member 13 causes the spring of the compression coil spring 29. It moves downward with respect to the holder 1 against the force. This downward movement of the punch member 13 is performed in a rolling relationship with the holder 1 while being guided by the balls 19 of the linear stroke bearing 15 in a rolling state.

By this downward movement of the punch member 13, as shown in FIG. 1, the punch member 13 is engaged with the die groove 41 of the die member 37 with the plate material P sandwiched therebetween, whereby the plate material P is bent into the L shape. The song is performed.

FIG. 3 shows another embodiment of the punch set according to the present invention. In FIG. 3, the parts corresponding to those in FIG. 1 are designated by the same reference numerals as those in FIG. The punch set of this embodiment is constructed as a push-type L-shaped bending die, and the punch assembly 7 of this punch set has a shaft-shaped punch retainer 53 and a through bolt 55 at the bottom of the punch retainer 53. The punch member 57 is attached so as to be movable in the vertical direction by a predetermined amount, and the linear stroke bearing 15 as a linear rolling bush fitted and mounted on the outer periphery of the punch retainer 53.

The linear stroke bearing 15 has the same structure as that of the above-described embodiment, and includes an outer sleeve 17 and a plurality of balls 19 rotatably mounted on the inner peripheral surface of the outer sleeve 17. The ball 19 is rotatably engaged with a ball receiving groove 21 formed on the outer peripheral surface of the punch retainer 53 in the axial direction so as to support the punch retainer 53 so as to be movable in the axial direction, that is, the vertical direction. is doing.

The punch member 57 has a flat lower bottom surface 59 and a bent surface portion 61, and is biased downward by a compression coil spring 63 with a relatively large first spring force.

A bent piece pressing bolt 65 is fixedly mounted on the punch retainer 53 in a suspended state so that the mounting position can be adjusted in the vertical direction.

The punch head 23 is attached to the punch retainer 53, and the punch retainer 53, the punch member 57, the linear stroke bearing 15, and the compression coil spring 29 are handled as a unitized punch assembly 7. Also in this case, the punch assembly 7 holds the outer sleeve 17 in the punch holding hole 3 with the key 29 attached to the outer peripheral portion of the outer sleeve 17 engaged with the key groove 31 in the punch support hole 3. It is detachably fitted into the holder 1 so as to be replaceably mounted on the holder 1 and fixed to the holder 1 by the set screw 33.

A die member 67 is positioned and mounted by a key 69 in the die holding hole 5. The die member 67 has a counter holder hole 71 with an upper opening, and the counter holder 75 is attached to the counter holder hole 71 by a through bolt 73 so as to be vertically movable by a predetermined amount and facing the punch member 57. Has been. The counter holder 75 has a flat upper surface 77 facing the lower bottom surface 59 of the punch member 57, and is biased upward by a compression coil spring 79 with a second spring force smaller than the first spring force. .

A bending shoulder portion 81 corresponding to the bending surface portion 61 of the punch member 57 is formed on one side of the die member 67.

In the push-type L-shaped bending punch set having the above-described structure, the punch retainer 53 is pressed down by the striker (not shown) in the drawing so that the punch retainer 53 is pressed. Moves downward with respect to the holder 1 against the spring force of the compression coil spring 29. The downward movement of the punch retainer 53 is performed in a rolling relationship with the holder 1 while being guided by the balls 19 of the linear stroke bearing 15 in a rolling state.

By the lowering movement of the punch retainer 53, the lower bottom surface 59 of the punch member 57 comes into contact with the plate material P, and the plate material main portion Pa of the plate material P is positioned below the upper surface 77 of the counter holder 75 and the punch member 57. It is sandwiched by the bottom surface 59 and clamped by these.

When the punch retainer 53 further descends from this state, the punch member 57 pushes the counter holder 75, and the counter holder 75 moves downward with respect to the die member 69 against the spring force of the compression coil spring 79. Like As the counter holder 75 descends, the bent piece Pb of the plate P is sandwiched between the bending shoulder portion 81 and the bent surface portion 61 of the punch member 57, and the bent piece Pb extends along the bending curve slit Sa. The plate material main portion Pa is bent.

As shown in FIG. 3, when the counter holder 75 descends to the lowest position, the bent piece Pb is bent 90 degrees with respect to the plate material main portion Pa.

As the punch retainer 53 further descends, the punch retainer 53 descends while bending the compression coil spring 63, and this lowering causes the bending piece pressing bolt 65 to move to the bending piece Pb. It comes into contact with the upper end portion and presses the bent piece Pb downward in the plate thickness direction of the plate material main portion Pa. By this pressing, the bent piece Pb is displaced downward with respect to the plate material main portion Pa by the plate thickness of the plate material main portion Pa, and the bent piece Pb overlaps the end face portion of the plate material main portion Pa. This completes the push-type L-shaped bending of the plate material P.

In the above embodiment, the linear stroke bearing 15 is used as the linear rolling bush, but the linear rolling bush may be a linear ball bearing.

In the above, the present invention has been described in detail with respect to specific embodiments, but the present invention is not limited to these, and various embodiments are possible within the scope of the present invention. It will be obvious to those skilled in the art.

[0033]

[Effect of device]

 As can be understood from the above description, according to the punch set of the present invention, the punch member and the punch retainer are guided by the linear rolling bush and move in the axial direction in the rolling relationship with respect to the holder. The punch retainer does not rattle in the radial direction with respect to the holder, and the wear of the punch member and the fitting part between the punch retainer and the holder is reduced as compared with the past, and these contribute to long-term application. The machining accuracy is maintained and the durable life of the punch member, punch retainer and holder is improved.

[Brief description of drawings]

1 is a longitudinal sectional view showing an embodiment of a punch set according to the present invention.

FIG. 2 is a partial sectional perspective view showing an essential part of an embodiment of a punch set according to the present invention.

FIG. 3 is a vertical sectional view showing another embodiment of the punch set according to the present invention.

[Explanation of symbols]

 1 Holder 3 Punch Support Hole 7 Punch Assembly 13 Punch Member 15 Linear Stroke Bearing 23 Punch Head 35 Die Holder 37 Die Member 51 Lower Table 53 Punch Retainer 57 Punch Member 65 Bending Piece Pressing Bolt 67 Die Member 75 Counter Holder

Claims (1)

[Scope of utility model registration request] 1. A punch set in which a punch member or a punch retainer is axially movably fitted into a punch support hole formed in a holder, and the punch member or the punch retainer is movably supported by the holder. A linear rolling bush is attached to a fitting portion of the member or the punch retainer with respect to the punch supporting hole, and the punch member or the punch retainer is configured to be guided by the linear rolling bush and move in the axial direction. Punch set.