JPH0615823U - Punching machine punching unit - Google Patents

Abstract

(57) [Summary] [Purpose] A lower washer (12) is provided at the lower end of the shaft portion (11) of the punch body (1) and is movable in the axial direction, and a punch head (1) provided at the upper end.
In the punch unit of the type in which the return spring (14) is interposed between 3), the height adjustment range is large and the distance between the punch body (1) and the die (D) does not change even after height adjustment. In the configuration, the punch body (1) and the shank (1
Punch body (1) and shank (11) with sufficient strength in 1)
To improve the accuracy of the coaxiality of. [Structure] Punch head (13) is screwed onto shaft (11), and shaft (1
Auxiliary cylinder (2) that is axially movable with respect to (1) and that is screwed into the punch head (13) is provided, and the lower end is the boundary between the punch body (1) and the shaft (11). Having contacted the club.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a punch unit of a punching machine, in particular, a so-called turret type punching machine in which the combination of the punching unit and the die can be exchanged, and the punch head of the punch unit held by the turret is a striker of the punching machine. The present invention relates to the punch unit of a type in which a plate to be processed which is interposed between the die and the punch is punched by driving the punch unit into the die side.

[0002]

[Prior art and problems]

As the punch unit of the above type, the type shown in FIG. 1 is the most popular. In this case, the punch body (1) is housed in the guide tube (G) mounted on the first turret (T ₁ ), and the punch body (1) is slidable on the lower end of the shaft section (11) which continues above the punch body. Of the lower washer (12), which is externally fitted, a disk-shaped punch head (13) screwed to the upper end of the shaft (11), and the lower washer (12) and the punch head (13). It consists of a return spring (14) interposed between an upper washer and a lower washer.

When the punch unit having the above-described structure is mounted on the guide tube (G) of the first turret (T ₁ ), the striker (S) is located above the punch unit, and below the punch unit, The die (D) attached to the second turret (T ₂ ) is located. Then, when the work plate (W) is interposed between the die (D) and the guide tube (G) and the striker (S) is operated, the punch body (S) is driven by the striking force of the striker (S). 1) is pushed down against the urging force of the return spring (14), and the punched part of the plate to be processed (W) is punched by the punching blade (1a) at the lower end of the punch body (1) and the die (D). It is punched into a predetermined shape by the blade.

When the striker (S) returns to the initial position after completion of the punching, the punch body (1) is also returned to the initial position by the return spring (14) and the punching blade (1) of the punch body (1) is returned. 1a) moves upward from the work plate (W). After that, when the plate to be processed (W) is moved and the above operation is repeated, a new punched part is punched.

When the punching blade (1a) is worn or damaged, a new punching blade (1a) is finished by polishing. At this time, the length of the punch body (1) gradually decreases by the length corresponding to the polishing amount as shown by the broken line in the figure, so that the punching blade (1a) is constantly intruded into the die (D). Adjust the screwing degree of the punch head (13) to secure the depth. This is the so-called height adjustment, which allows the punch head (13) to approach the striker (S) side and to move the punch body (1) downward by a constant stroke for a large amount of downward movement of the punch body (1). The penetration depth of the punching blade (1a) into the die (D) becomes a predetermined depth.

However, this conventional device has a problem that the height adjustment range is small. This is because in the initial state of the punch unit, the height adjustment can be performed only within the range in which the punch head (13) contacts the lower end of the striker (S). When the punching blade (1a) is repeatedly polished as shown by the broken line in the figure, the distance between the punching blade (1a) and the die (D) in the initial state (non-punching position) of the punch unit increases. However, there is a problem that noise during the punching operation becomes large.

As a solution to this problem, as shown in FIG. 2, there is a method in which the punch body (1) and the shaft portion (11) are separated and screwed coaxially. With this product, when adjusting the height, adjust the screwing degree between the shaft part (11) and the punch body (1) to adjust the position of the punching blade (1a) with respect to the guide tube (G) and the shaft part. Since the distance between the punch head (13) integrated with (11) and the striker (S) is kept constant, the above inconvenience is solved.

However, in this prior art, the striking force of the striker (S) is transmitted to the punch body (1) via the screwing part (M) between the shaft part (11) and the punch body (1). As a result, this threaded portion (M) is easily damaged. Further, if the accuracy of coaxiality between the shaft portion (11) and the punch body (1) in this screwed portion is insufficient, the damage is more likely to occur, and the punch body (1) and the guide tube ( The smoothness of the relative movement with G) is insufficient.

According to the present invention, at this point, "a lower washer (12) that is axially movable relative to this is provided at the lower end of the shaft portion (11) that is connected to the punch body (1), and A punch head (13) is provided at the upper end, and a return spring (14) is interposed between the lower washer (12) and the punch head (13). The strength of the punch body (1) and shank (11) must be sufficient to prevent the gap between the punching blade (1a) at the lower end of the punch body (1) and the die (D) from changing even afterwards. Moreover, it is an object to improve the accuracy of coaxiality of the punch body (1) and the shaft portion (11).

[Invention of Claim 1]

[0011]

[Technical means]

 The technical means of the present invention for solving the above-mentioned problem is that "the punch head (13) is screwed onto the shaft portion (11) and is fitted onto the shaft portion (11) so as to be movable in the axial direction and at the same time, the punch head (13). The auxiliary cylinder (2) screwed to the cord (13) is provided, and the lower end portion is brought into contact with the boundary portion between the punch body (1) and the shaft portion (11).

[0012]

[Action]

The above technical means act as follows. The auxiliary cylinder (2) and the lower washer (12) are screwed together, and the auxiliary cylinder (2) is fitted onto the shaft portion (11) so as to be axially movable. Therefore, when the striker (S) pushes the punch head (13) while it is attached to the first turret (T ₁ ), the punch body (1) is pushed by the die (D). Then, when the striker (S) is returned to the initial position, the punch body (1) is lifted by the return biasing force of the return spring (14) and the boundary portion between the punch body (1) and the shaft portion (11) is lifted. Returns to the initial position where it touched the lower end of the auxiliary cylinder (2). That is, it can be used in the same manner as the conventional one.

After polishing the punching blade (1a), in order to adjust the height, the degree of screwing between the lower washer (12) and the auxiliary cylinder (2), the punch head (13) and the shaft portion (11) are adjusted. Adjust the screwing degree. As a result, the position of the punching blade (1a) with respect to the die (D) and the position of the punch head (13) with respect to the striker (S) are adjusted to the initial position before polishing. When the striking force or the pressing force of the striker (S) acts on the punch head (13), the punch head (13) and the shaft portion (11) are screwed together to allow the punch body (11) to move from the punch body ( It will directly act on 1). Further, since the punch body (1) and the shaft portion (11) are integrally formed, the accuracy regarding the coaxiality between the punch body (1) and the shaft portion (11) is The precision is consistent with the precision when the shaft (11) and the shaft (11) are integrally machined, and the above precision is ensured.

[0014]

【effect】

 Since the position of the punch head (13) and the position of the punching blade (1a) after height adjustment do not change from the initial position before adjustment, there is a concern that the machining impact noise will increase due to repeated polishing of the punching blade (1a). There is no. Further, the height adjustment range is determined by the screwing range between the punch head (13) and the shaft portion (11) and the screwing range between the auxiliary cylinder (2) and the lower washer (12), and this adjustment range is sufficient.

Further, since the shaft portion (11) and the punch body (1) are integrally structured, the strength is sufficient and the accuracy regarding coaxiality is also sufficient. [Invention of Claim 2] In this invention, the adjustment degree of screwing degree between the auxiliary cylinder (2) and the lower washer (13) and the screwing between the shaft portion (11) and the lower washer (13) are defined. By adjusting the degree of conformity at the same time, the work for adjusting the weight can be further simplified.

[0016]

[Technical means]

 The technical means adopted for this purpose is to “engage the auxiliary cylinder (2) with the punch body (1) or the shaft part (11) in a non-rotatable manner, and to engage the shaft part (11) and the punch head (13). ), And the lead of the screw washer of the lower washer (12) and the auxiliary cylinder (2) was matched.

[0017]

[Action / effect]

 Since the auxiliary cylinder (2) is engaged with the punch body (1) or the shaft (11) in a non-rotating state, the auxiliary cylinder (2) is rotated together by rotating the punch body (1). It Further, since the lead of the screwing portion of the shaft portion (11) and the punch head (13) and the lead of the screwing portion of the lower washer (12) and the auxiliary cylinder (2) are aligned, the two screwing portions are It is possible to adjust the degree of screwing at the same time, and it is easy to adjust the height.

[0018]

【Example】

 Next, the embodiments of the present invention described above will be described in detail with reference to the drawings. In the embodiment shown in FIGS. 3 to 5, the structure is basically the same as that of the conventional punch unit shown in FIG. The punch body (1) is integrally formed with the punching blade (1a) and the shaft portion (11), and is manufactured by cutting from a rod-shaped material, and the male screw portion (16) is formed on the upper end of the shaft portion (11). It is formed. The punch head (13) is screwed into the male screw part (16), and the upper washer (17) is taper fitted to the screw cylinder (15) of the punch head (13). The diameter of the punch head (13) is set smaller than the diameter of the upper washer (17).

A boundary portion between the shaft portion (11) and the punch body (1) is a tapered surface that expands downward, and an auxiliary cylinder and an auxiliary cylinder provided with a tapered surface that is in contact with this tapered surface ( 2) is externally fitted to the lower end of the shaft part (11), and the punch head (13) is screwed to the auxiliary cylinder (2). A return spring (14) is interposed between the punch head (13) and the upper washer (17).

The auxiliary cylinder (2) is fitted onto the shaft portion (11) in a non-rotatable state, so that as shown in FIGS. 3 and 4, the shaft portion (11) and the punch body (1) are Pins (21) and (21) are planted at symmetrical positions on the taper surface of the boundary with the pin (21) (21) at the lower end of the flange (22) formed at the lower end of the auxiliary cylinder (2). A pair of notches (23) and (23) into which the pins (21) are fitted are formed, and the pins (21) and (21) are individually fitted into the notches (23) and (23) from below.

In this embodiment, as shown in FIG. 3, when the guide blade (G) of the first turret (T ₁ ) is mounted, the punching blade (1a) is attached to the die of the second turret (T ₂ ). Faced with (D), the punch head (13) faces the striker (S) and can be used in the same manner as the conventional one. When polishing the punching blade (1a), the punch unit is removed from the first turret (T ₁ ) and the end surface of the punching blade (1a) is polished by a predetermined amount. After this, as shown in FIG. 5, the gap between the upper washer (17) and the lower washer (12) should be adjusted so that the press fit between the punch head (13) and the upper washer (17) is released. ) (J), and rotate the punch body (1) or the punch head (13) to adjust the height according to the polishing amount. At this time, adjustment of the screwing degree of the punch head (13) and the male screw part (16) and adjustment of the screwing part of the auxiliary cylinder (2) and the lower washer (12) are performed separately. When fixing the lower washer (12) and turning the punch body (1), the auxiliary cylinder (2) and the punch body (1) should be connected to the pins (21) (21) and notches (23) (23). The rotation of the auxiliary cylinder (2) is integrally rotated with the punch body (1) by the engagement of, so that the screwing portion of the auxiliary cylinder (2) and the lower washer (12) can be adjusted. At this time, since the punch head (13) is in the free state, the screwing degree between the punch head (13) and the shaft portion (11) is not adjusted. After that, when the degree of screwing of the punch head (13) is adjusted with the punch body (1) fixed, the height adjustment is completed.

Alternatively, the gap between the lower washer (12) and the punch head (13) is shortened to such an extent that the notch (23) and the pin (21) are disengaged, and then the shaft (11) and the punch (13) are temporarily separated. After adjusting the screwing degree with the head (13) to an appropriate state, the screwing degree of the auxiliary cylinder (2) may be corrected so that the pins (21) (21) and the notch (23) are aligned. . If the lead of the screw part of the auxiliary cylinder (2) and the lead of the screw part of the shaft part (11) are aligned, the male screw part (16) and the lower washer ( Axial movement in the threaded part of 12) and axial movement in the threaded part with the lower washer (12) when the auxiliary cylinder (2) is rotated integrally with the punch body (1). The amount matches. Therefore, with this configuration, when the punch body (1) is rotated while the lower washer (12) and the punch head (13) are both fixed, the lower washer (12) and the punch head (13) are Only the punch body (1) can be moved relative to each other without changing the relative position, and height adjustment is easy. Even in this case, if the distance between the lower washer (12) and the punch head (13) is shortened and the return spring (14) is fixed in a compressed state, the punch body (1) can be rotated lightly and the height Easy to adjust.

[Brief description of drawings]

FIG. 1 is a sectional view of a conventional punch unit.

FIG. 2 is a sectional view of another example of a conventional punch unit.

FIG. 3 is a sectional view of an embodiment of the present invention.

FIG. 4 is an enlarged view of the auxiliary cylinder (2).

FIG. 5 is an explanatory diagram for height adjustment.

[Explanation of symbols]

 (1) ・ ・ ・ Punch body (11) ・ ・ ・ Small diameter shaft (12) ・ ・ ・ Lower washer (13) ・ ・ ・ Punch head (14) ・ ・ ・ Return spring (2) ・ ・ ・ Auxiliary cylinder

Claims (2)

[Scope of utility model registration request] 1. A shaft portion (11) connected to a punch body (1).
A lower washer (12) that can move in the axial direction is provided at the lower end of the punch, and a punch head (13) is provided at the upper end of the lower washer (12), and a return spring (12) is provided between the lower washer (12) and the punch head (13). In the punch unit of the type in which
(13) is screwed to the shaft portion (11), is fitted to the shaft portion (11) so as to be axially movable, and is provided with an auxiliary cylinder (2) screwed to the punch head (13). A punch unit for a punching machine, the lower end of which is in contact with the boundary between the punch body (1) and the shaft (11). 2. The auxiliary cylinder (2) is attached to the punch body (1) or the shaft portion.
(11) is engaged in a non-rotating state, the lead of the screw part of the shaft part (11) and the punch head (13), the lower washer (12) and the auxiliary cylinder
The punch unit of the punching machine according to claim 1, wherein the lead of the screwing portion of (2) and the lead of the screw unit are matched.