JPS6336934A - Punch mechanism - Google Patents

Abstract

PURPOSE:To obstruct a rotation of an adjusting nut against a punch, and to improve the reliability of a punch mechanism by allowing a detaining means to be freely installable between a setting means and an engaging part, and engaging a side face part of the detaining means and engaging part. CONSTITUTION:An impact force from a striker is transferred to a punch 5 through an adjusting unt 10, through screws 10f, 5b of both of them. Between the adjusting nut 10 and the punch 5, a check pin 13 is engaged through a groove 5c and a set hole 10b, and even if the adjusting nut 10 tries to rotate against the punch 5, a side face part 13a of the check pin 13 which has been installed through the groove 5c to the set hole 10b abuts on the wall surface of the groove 5c, by which the rotation is obstructed exactly. Also, the check pin 13 is constituted so that its side face part 13a abuts on the punch 5 and obstructs the rotation of the adjusting nut 10, therefore, it does not occur that a rotational force around the axis center works on the check pin 13 by an abutting action, and accordingly, it does not occur either that a set screw 15 is rotated thereby.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a punch mechanism in a punch press, which is used in combination with a goo for punching out leaks.

(b), Prior Art FIG. 7 is a front view showing a conventional punch mechanism, and FIG. 8 is a plan view showing an adjustment nut portion of the conventional punch mechanism.

Normally, in this type of punch press, the punch gradually wears out with use, so it is necessary to polish it periodically, which causes the overall length of the punch to gradually shorten. In order to perform proper machining, the tip of the punch must always be held in a constant position.
for that! An Ig adjustment mechanism is used. This tone! !
Conventionally, the mechanism is as shown in Figs. 7 and 8.
An adjustment nut type punch is known, in which the entire length L2 of the punch including the adjustment nut is always kept constant by appropriately rotating the mu nut 10 screwed onto the punch 5.

Further, in order to maintain the overall length L2 adjusted by the adjustment nut 10, a detent is used to prevent the adjustment nut from rotating relative to the punch.

This rotation is usually achieved by engaging a set screw 7 from the side of the adjustment nut toward the side of the punch, and firmly pressing the tip of the set screw 7 into a predetermined portion of the punch 5, and then tightening the adjustment nut 10 with the pressing force. It has been known that the punch 5 is integrated with the set screw 7 to prevent the adjustment nut 10 from rotating around the punch 5.

(C) 0 Problems to be Solved by the Invention However, in this method using the set screw 7, if the punch is continuously hit with a high load, the screw 101 of the adjusting nut 10 and the punch 5
The backlash generated in the screw 95blJl causes vibration between the adjusting nut 10 and the punch 5 in the directions of arrows A and B in FIG. 7, and this vibration causes relative movement between the set screw 7 and the punch 5. As a result, the set screw 7 quickly loosened, the w4v1 nut 10 rotated relative to the punch 5, and the adjusted overall length L2 became incorrect.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, it is an object of the present invention to provide a punching mechanism that can reliably prevent the adjustment nut from rotating relative to the punch even during punching operations under high loads.

(d) Means for solving the zero problem, that is, the present invention forms - or more engaging portions (5c15h) in the screw (5b) portion of the punch (5), and sets them in the adjustment nut (10). The means (1ob) is connected to the engaging part (5c
, 5h), and further includes a locking means (1
3) with the setting hand 19 (10b) and the engaging portions (5a, 5h).
) between the locking means (13) and when the locking means (13) is attached to the setting means (10b).
) and the engaging portions (5c, 5h) engage with each other to prevent rotation of the Tl411 nut (10) relative to the punch (5).

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings. r (e) below
The same applies to the column ``, action''.

(6) 0 effect With the above-described configuration, the present invention provides the side surface portion (13m) of the stopper bottle (13) and the engaging portions (5c, 5h) of the punch (5).
5 due to engagement between! The adjustment nut (10) is prevented from rotating, and since the pressing force of the set screw is not used to prevent the adjustment nut (10) from rotating, the screw (10f) of the adjustment nut (10) and the thread L of the punch (5) are tightened. /(5b) It acts so as to eliminate the influence of vibration due to backlash that occurs between.

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a front view showing an embodiment of the punch mechanism according to the present invention, FIG. 2 is a plan view showing the adjustment nut portion of FIG. 1, and FIG. Fig. 4 is a partial front view showing another embodiment of the present invention; Fig. 5 is a plan view showing the adjustment nut portion of Fig. 4; Fig. 6 is the punch mechanism of Fig. 4. It is a figure which shows the engagement state of the punch and the stop pin in .

As shown in FIG. 1, the punch mechanism 1 has a guide cylinder 3, into which a rod-shaped punch 5 is slidably engaged in the directions of arrows A and B. ing. A retainer ring 6 is provided at the upper part of the guide tube 3 in the figure to cover the punch 5 via a shim ring 14, and the retainer ring 6 is fixed to the guide tube 3 with a set screw 8. ing.

On the other hand, a screw 5b is screwed into the upper part of the punch 5, and a groove 50 is formed in the upper part of the screw 5b in FIG. 1, passing through the axis of the punch 5, as shown in FIG. It is perforated. An adjustment nut 10 is screwed into the screw 5b via a screw 10f, and a flange portion 10a of the adjustment nut 10 has a
A set hole 10b is formed through the set hole 10b in the left-right direction in FIG. One opening of the set hole 10b is formed with an enlarged diameter, and the enlarged diameter part has a screw 1.
0c is screwed. In addition, a stepped portion 10a is formed at the other opening of the set hole 10b, and a hole 10d with a smaller diameter is formed on the right side of the set hole 10b (
Therefore, in this case, the set hole 10b appears to be the groove 5.
Consisting of two holes facing each other via C). In the set hole 10b and the groove 5C, a stop pin 13 is inserted into the set hole 10b at both ends and engaged with the set hole 10b.
As shown in FIG.
A set screw 15 is screwed into the screw 10c on the left side of the figure with its tip abutting the left end of the stop pin 13. In addition,
A coil spring 11 is connected to the punch 5 between the flange portion 10a of the adjustment nut 10 and the flange portion 6a of the guide ring 6.
It is contracted in such a way that it covers the

Since the punch mechanism 1 has the above configuration, when processing a workpiece, the upper end of the punch 5 is adjusted from the top to the bottom in FIG. 1, that is, in the direction of arrow B, using a striker (not shown). Strike through the nut 10. Then, the punch 5 moves in the direction of arrow B together with the adjustment nut 10 against the elasticity of the coil spring 11, punches out a workpiece (not shown) positioned at a predetermined position below the punch mechanism 1 in FIG. 1, and performs a predetermined processing. will be held. It should be noted that, as a matter of course, a die corresponding to the punch 5 is provided at the lower part of the punch mechanism 1 in FIG. A detailed explanation regarding the punching operation and the punching operation will be omitted.

When the punching of the workpiece is completed, the pressing force in the B direction applied to the punch 5 via the adjustment nut 10 is released, and the punch 5 is moved in the input direction by the elastic force of the coil spring 11 to a predetermined standby position. Return.

When striking with this striker (not shown), the striking force from the striker is transmitted to the punch 5 via the adjustment nut 10 and the screws 10f and 5b of both. Between the adjustment nut 10 and the punch 5, there is a stop pin 13 of 45c.
and the set hole 10b, and even if the adjusting nut 10 attempts to rotate relative to the punch 5, the rotation is prevented by the stop pin 1 installed in the set hole 10b through the groove 5C.
This is reliably prevented by the side portions 13a of No. 3 coming into contact with the wall surfaces of the grooves 5C. Further, the retaining pin 13 has a side surface 1
3a is in contact with the punch 5 to prevent the adjustment nut from rotating 100 times, so due to the corresponding contact action, no rotational force is applied to the stop pin 13 around its axis, and the set screw 15 is thereby prevented from rotating. There's nothing to do. Furthermore,
The retaining pin 13 itself is installed in the set hole 10b with one end in contact with the stepped portion 10e and the other end pressed into engagement with the set screw 15. It is securely fixed to the adjustment nut 10 without moving in the axial direction, and rotation of the adjustment nut 10 relative to the punch 5 can be reliably prevented.

Furthermore, when the striking operation by the striker is performed under high load, small vibrations occur between the adjusting nut 10 and the punch 5 due to the backlash existing between the screws 10f and 5b.
It occurs in the directions of arrows A and B in FIG. However, retaining pin 1
The engagement relationship between 3 and 115c is not affected by such vibrations, and therefore the set screw 15 will not be rotated and loosened thereby.

Therefore, even if the striking operation under high load is repeated, the adjusting nut 10 will not rotate relative to the punch 5, and the total length L1 of the bunch mechanism 1 and the entire length including the adjusting nut 10 of the punch 1 will be fixed. L2 is always kept at a proper value.

In this way, the punching operation by the punch 5 is l! i)1
"iA", but in order to maintain machining accuracy, it is necessary to polish the tip of the punch 5 after performing the punching operation a predetermined number of times. Since the total length L2 is shortened, punch 5 is changed to yA.
Protrude in the B direction relative to the adjustment nut i・10,
The total length L2 of the punch 5 including the adjustment nut 10 should always be a constant value, so that the tip 5e of the punch 5 retreats in the direction of entry with respect to the guide cylinder 3, and the punching process cannot be performed smoothly. (At this time, the shim ring 14 is also adjusted so that the overall length L1 is also constant.)
.

That is, the set screw 15 is removed from the screw 10c, a rod is inserted through the hole 10d of the set hole 10b, and the stop pin 13 is pushed out to the left in FIG. 1 and removed. Then, the engagement between the stop pin 13 and the groove 5C is released, so that the adjustment nut 10 can freely rotate relative to the punch 5. Therefore, adjust the adjustment nut 10 by an appropriate angle (limited to an angle that allows the groove 50 and set hole IQb to align).
The adjustment nut 10 is moved in the inward direction relative to the punch 5 by rotating the punch 5 by 100 degrees, and the total length L2 of the punch 5 including the adjustment nut 10 is adjusted to be the length before polishing. Note that the adjustment nut IO rotates smoothly around the screw 5b in the same way as a normal screw. In this way, when the length L2 has reached w4n+ (in this state, the groove 5C and the set hole 10b are aligned), insert the stop pin 13 into the set hole 105 again through the groove 50 of the punch 5, The punch 5 and the adjustment nut 10 are engaged through the groove 5C and the set pin 13, and in this state, the set screw 15 is screwed into the screw 10c, and the set pin 13 is fixed between the stepped portion 106 and the set screw 15. do. Then, punch 5 and adjustment nut 1
0, the adjusting nut 10 is held without rotating relative to the punch 5, and the total length L2 of the punch 5 including the adjusting nut 10 is fixed to be equal to the total length before grinding III. At this time, as mentioned above, the shim ring 14 is adjusted to adjust the total length Ll, and the punch tip se
There is an adjustment operation for positioning the em at the correct position, but since the adjustment operation using the shim ring 14 is well known, detailed explanation thereof will be omitted here.

In addition, although the above-mentioned embodiment described the case where the retaining portion with which the retaining pin 13 engages is formed in a groove shape such as the groove 50, the retaining portion formed on the punch 5 is 13 side part 13 engages with the punch 5 and 7A11 nut 10
For example, as shown in FIGS. 4 to 6, a part of the screw 5b of the punch 5 may have an engaging surface 5h. At the same time, the set hole 10b is formed at a position slightly eccentric to the right in the figure from the center of the adjustment nut 10 in FIG. 5 so that the stop pin 13 can be set on the engagement surface 5h. It is also possible to configure it as follows. Such a configuration is advantageous when the punch 5 has a small diameter and the groove 5c cannot be formed in the threaded portion 5b.

Further, the number of engagement parts such as the groove 5c and the engagement surface 5h is not limited to the negative part as in the case of this embodiment, but it is naturally possible to form them as appropriate on the circumference of the screw 5b part. . Note that if a large number of engaging portions are formed, the adjusting nut 10 must be rotated by a slight angle. This makes it possible to install the retaining pin 13.
Fine adjustments can be made. For example, as shown by the imaginary line in FIG. By providing two engagement surfaces 5h at 180° pitches, it becomes possible to fix the tJ411 nut lO at every 180° pitch, and the total length L2 can be precisely adjusted to mq.

Furthermore, the above-described embodiment has a stop fin 13 and a set screw 15.
In the above, the fixing pin 13 and its fixing means are provided separately and independently, but it is not necessary to provide the fixing means independently of the fixing pin 13.
Screw the screw into the adjustment nut 10 and directly adjust the fixing pin 13.
Of course, it is also possible to configure it so that it is fixed to .

(g) 0 Effects of the Invention As described above, according to the present invention, one or more engaging portions such as the groove 5c and the engaging surface 5h are formed in the threaded portion 5b of the punch 5, and the adjusting nut 10 A setting means such as a set hole 10b is formed so as to be aligned with the engaging part, and a locking means such as a stop pin 13 can be freely installed between the setting means and the engaging part. When the adjusting nut 10 is attached to the setting means, the side surface 13a of the locking means engages with the engaging portion to prevent the adjustment nut 10 from rotating with respect to the punch 5. The rotation of the adjusting nut 10 is not only prevented by the engagement between the side surface 13a of the locking means and the engaging portion of the punch 5, but also the rotation between the adjusting nut 10 and the punch 5 is prevented by using the pressing force of the set screw. It is possible to eliminate the influence of vibration due to backlash that occurs between the screw 10f of the adjusting nut 10 and the screw 5b of the punch 5, which occurs when blocking the lJ! It is possible to prevent the alignment nut 10 from rotating relative to the punch 5, and it is possible to provide a highly reliable punch mechanism 1.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the punch mechanism according to the present invention, FIG. 2 is a plan view showing the adjustment nut portion of FIG. 1, and FIG. Fig. 4 is a partial front view showing another embodiment of the present invention; Fig. 5 is a plan view showing the adjustment nut portion of Fig. 4; Fig. 6 is the punch mechanism of Fig. 4. FIG. 7 is a front view showing a conventional punch mechanism, and FIG. 8 is a plan view showing an adjustment nut portion of the conventional punch mechanism. 1...Punch 4J! Structure 5- Punch 5b Screw 5C Groove 5h Engagement surface 10 Adjustment nut 10b Setting means (set hole) 13 Locking means (stop pin) 13a...Side part L2...Full length Applicant Yamazaki Maza νri Co., Ltd. Agent Patent attorney Phase 1) Shinji 2 Figure 1''-5e Figure 5 Figure 4 Figure 8

Claims (3)

[Claims] (1) It has a punch and an adjustment nut screwed onto the punch via a screw, and by rotating the adjustment nut relative to the punch, the entire length of the punch including the adjustment nut can be adjusted. In the punch mechanism, one or more engaging parts are formed on the threaded portion, a setting means is formed on the adjusting nut so as to be aligned with the engaging part, and a locking means is further engaged with the setting means. The locking means can be freely installed between the joint parts, and when the locking means is mounted on the setting means, the side surface of the locking means and the engaging part can be engaged to prevent the adjustment nut from rotating with respect to the punch. The punch mechanism is set up and configured as follows. (2) The punch mechanism according to claim 1, wherein the engaging portion is a groove formed in the threaded portion. (3) The punch mechanism according to claim 1, wherein the engaging portion is an engaging surface formed on a side surface of the threaded portion.