JPS62107829A - Punch driving device - Google Patents

Abstract

PURPOSE:To easily feed a punch to the prescribed position by regulating the movement of a ram shaft with the member which is reciprocated by a rotary member and the stopper which is integrated with the ram shaft in the titled device pressing the pipe terminal with the punch. CONSTITUTION:A whirl-stop is performed with the outer engagement of a slider 6 to a ram shaft 4 by crossing the male screw on the outer periphery thereof and by fitting the tip of a pin 18 to the groove in the axial direction thereof. First a step motor 14 is rotated, the rotary nut 8 which is screwed to said male screw is rotated and the slider 6 is moved in A direction until its end face is detected by contactless switch 26, and a motor 14 is stopped. The slider 6 is then moved in B direction by the value corresponding to the production error of the punch 32 from its origin by reversing the motor 14. The pressing is then performed by feeding the punch 32 to the work position by moving the shaft 4 in A direction by driving a cylinder rod 3 with hydraulic cylinder 2. In this case the end face 3a which makes at right angles approximately with the shaft 4 of the rod 3 is abutted to the end face 6a of the slider 6 and the rod 3 is stopped at this position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a punch drive device, and more particularly to a punch drive device for pressing the end of a pipe with a punch.

[Prior Art] Conventionally, pipes with a flared end or the like have been widely used in hydraulic piping for automobiles, aircraft, and the like.

This flaring process is performed by clamping the end of the pipe with a female die and feeding a predetermined amount of male punches using a punch drive device. In addition, 2-bunch and 3-bunch zero machining, which involve multiple processes using several types of punches, such as double flaring and expanded flaring, are also carried out. In such machining, when replacing the punch with a new one or using several types of punches, adjustments were made so that the machining position would be the same.

[Problems to be Solved by the Invention] However, such conventional punch drive devices have the following problems. That is, (1) since the feed rate of the punch is constant, the dimensional difference due to the manufacturing error of the punch can be adjusted by reworking the end face for attaching the punch, or
Adjustments were made by inserting shims into the mounting section. Therefore,
Adjustments were troublesome because the process of performing trial machining, removing the punch, adjusting it, reattaching it, and performing trial machining was repeated until proper machining was achieved.

(2) The above-mentioned adjustment amount was a minute maximum, and adjustment required skill.

(3) In order to make adjustments, work must be done between the ram shaft on the movable side and the die on the stationary side, which poses a safety problem.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has been made to provide a punch drive device that can be adjusted without reworking the punch or inserting a shim.

L1 trivial [Means for solving the problems] In order to achieve the above object, the present invention has the following configuration as a means for solving the problems. That is, in a punch drive device that feeds a punch for pressing the end of a vibrator to a processing position by a ram shaft, a collar having a surface substantially perpendicular to the ram shaft is provided integrally with the ram shaft, and the ram A reciprocating member that is fitted onto the shaft and reciprocates in the axial direction of the ram shaft is prevented from rotating, and the reciprocating member is provided with a surface that comes into contact with the stopper, and a male thread is formed on the outer periphery of the reciprocating member. The structure of the punch driving device is characterized in that it is provided with a drive mechanism for reciprocating the reciprocating member by rotating a rotary member screwed onto the male screw of the reciprocating member. be.

Here, the rotating mechanism is, for example, a mechanism in which a large bevel gear attached to the outer periphery of a rotating member is rotated by a small bevel gear attached to a motor, or a timing belt that drives a pulley attached to a female screw by a motor. It may also be a rotating mechanism.

Moreover, times like these! A mechanism may be used in which the IJfi is detected by an encoder or the like and the amount of rotation is controlled.

[Operation 1] In the punch drive device of the present invention having the above configuration, the reciprocating member is driven back and forth via the rotating member by the drive mechanism, and the stopper formed integrally with the ram shaft is brought into contact with the reciprocating member. This works to regulate the amount of movement of the ram shaft and feed the bonder to a predetermined position.

[Example] Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is a sectional view showing a punch driving device A, which is an embodiment of the present invention, together with a punch moving device B. As shown in FIG.

This punch drive device A is assembled using a housing 1 as a base, and includes a hydraulic cylinder 2 which is a drive source for press working, a cylinder rod 3 of this hydraulic cylinder 2. A ram shaft 4 whose one end is screwed onto the cylinder rod 3 and whose other end is T-shaped. A slider 6 externally fitted on the ram shaft 4, a rotating nut 881 screwed onto the slider 6, and a large bevel gear 10 fixed to the rotating nut 8. Dog bevel gear 10. ! : A small bevel gear 12 that meshes with the small bevel gear 12, and a step motor 14, etc., in which the small bevel gear 12 is keyed to a shaft and serves as a source of reciprocating motion of the slider 6, are provided.

The cylinder rod 3 has an end surface 3a formed substantially perpendicular to the rod axis, and a proximity switch 16 is inserted into this end surface 3a.

The slider 6 has an end face 6a that is substantially perpendicular to the slider axis on the side where the hydraulic cylinder 2 is provided.

This end surface 6a is formed to act as a stopper when the end surface 3a of the cylinder rod 3 comes into contact with it. Further, the slider 6 has a cylindrical shape and has a male thread formed on its outer periphery, and a groove is cut in the axial direction across a part of the male thread.

A pin 18 that prevents the slider 6 from rotating is fitted into this groove. This fitting is achieved by a width across flats formed at the tip of the bottle 18 to be approximately the same as this full width.

The rotating nut 8 is rotatably supported by a 2-1 dollar bearing 20 fitted to the housing 1 and a 2-1 dollar bearing 24 fitted to a bracket 22 bolted to the housing 1. . Further, a convex portion is provided approximately at the center of the rotating nut 8, and a ring-shaped large bevel gear 10 is bolted to one end surface of the convex portion. moreover,
The other end surface of this convex portion is in close contact with the bracket 22 and is formed so as to receive the pressing force of the hydraulic cylinder 2 applied to the slider 8 at this end surface. Further, a cap 2 in which a proximity switch 26 is inserted into the opening end of the bracket 22 is provided.
8 are bolted together. This proximity switch 26 is turned on when the slider 6 reaches a position where it comes into contact with the cap 28, and detects the original position of the slider 6.

In the punch drive device of this embodiment having the above configuration, when the step motor 14 rotates, the small bevel gear 12 rotates, and the large bevel tooth width 10 meshed with the small bevel gear 12 rotates. Due to the rotation of the large bevel gear 10, the large bevel gear 1
When the rotating nut 8 integrated with the 0 rotates, the bottle 18
The slider 6, which is prevented from rotating, reciprocates by the action of the screw.

Next, the punch moving device B will be explained. The press machine main body of this embodiment is provided with a punch moving device B adjacent to the punch driving device A for changing the bonder depending on the processed shape. This bonder moving device B selectively moves three types of punches 30, 32° 34 to a punch driving device A.
This driving is performed by coupling a T-shaped portion formed at one end of the ram shaft 4 with a lower groove formed at one end of the punch holder 36, 38, 40.

The punch moving device @B includes punches 30, 32.34, and punches 30, 32.3, which shape the end of the vibrator into a predetermined shape.
4 are fixed to punch holders 36, 38, and 40, a movable base 42 that supports the punch holders 3.6 and 38.40 so as to be slidable in the axial direction, and a movable base 42 that is attached to the punch holder 36.
, 38, 40, and the like are provided.

When the press machine body starts operating, the step motor 14 is rotated so that the slider 6 moves in the direction of arrow A. The rotation of the step motor 14 is continued until the end face of the slider 6 is detected by the proximity switch 26, and when the end face is detected, the rotation of the step motor 14 is stopped. This position is the origin of the slider 6. Above step motor 1
4 is reversed, and the slider 6 is moved from the origin by a value corresponding to the manufacturing error of the punch 32 in the direction of the arrow. This movement is realized by inputting a pulse signal corresponding to this value to the step motor 14.

Next, the cylinder rod 3 is driven by the hydraulic cylinder 2, and the ram shaft 4 is moved in the direction of arrow A. Further, the punch holder 38 connected to the ram shaft 4 through a T-groove is moved, and the punch 32 is fed to a processing position to perform press processing. At this time, when the end surface 3a of the cylinder rod 3 moves flI in the direction of the arrow Δ, the end surface 3a comes into contact with the end surface 6a of the slider 6, and the cylinder rod 3 is stopped at this position. The contact is detected by the proximity switch 16. Therefore, the slider 6 acts as a stopper for the ram shaft 4. When the press work is completed, the ram shaft 4 is sent in the direction B by the hydraulic cylinder 2 and returned to the position before the press work.

Next, replace the punch 32 with the punch 34 and press work 1-
In order to do this, input a pulse signal to the step motor 14,
The slider 6 is moved to a position corresponding to the punch 34. Further, the movable table 42 is lowered by the two-stage hydraulic cylinder 44, and the T-groove of the punch holder 40 and the T-shaped portion of the ram shaft 4 are coupled. As in the case of the punch 32 described above, the ram shaft 4 is moved in the direction of arrow A by the hydraulic cylinder 2. The punch holder 40 is moved by the ram shaft 4, and the punch 34 is fed to a processing position to perform press processing.

At this time, the slider 6 acts as a stopper at a position corresponding to the punch 34.

When replacing the punch 30 with the punch 30, pressing is performed in the same manner as with the punch 34 described above. The slider 6 is moved to a position corresponding to the punch 30 by the step motor 14,
The movable table 42 is raised by the two-stage hydraulic cylinder 44, and the punch holder 36 and the ram shaft 4 are coupled. The punch 30 is fed to the processing position by the hydraulic cylinder 2, and the breath carving is performed.

According to the punch drive device of this embodiment configured as described above, a pulse signal is input to the step motor 14 to move the slider 6 and stop the ram shaft 4 at a fixed position regardless of manufacturing errors of the punch. I can do it. Therefore, there is no need to perform additional machining on the end face of the punch or insert shims due to manufacturing errors in the punch, and it is easy to change the setup by replacing the punch.

By changing the pulse signal input to the step motor 4, the position of the slider 6 can be easily adjusted, and no skill is required for adjustment.

Furthermore, since the above adjustment is performed at a position separated from the ram shaft 4, which is a moving part, work safety can be ensured.

Further, by using the step motor 14, in combination with a holder moving device, it is possible to configure a device that can easily perform two-punch or three-punch pressing using two or more punches in succession. .

Although the embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and a manual adjustment knob is provided in place of the step motor 14, and the punch can be manually operated using this adjustment knob. It goes without saying that the invention can be implemented in various ways without departing from the scope of the invention, such as a configuration in which the position of the slider 6 is determined according to the invention.

11 whole animals 1 As detailed above, according to the punch drive device of the present invention,
It is said that the feed position of the punch that presses the end of the pipe can be freely adjusted (it has an excellent effect. Therefore, there is no possibility of deviations in the processing position when replacing the punch with a new punch due to manufacturing errors in the punch). can be easily adjusted.Furthermore, in a two-bunch press process using a plurality of punches, it can be easily adjusted to feed the plurality of punches to a predetermined position.

In other words, since the adjustment work can be done at a location away from the ram shaft, work safety can be ensured, and since the adjustment is easy, no skill is required.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a punch driving device showing an embodiment of the present invention. 4... Ram shaft 6... Slider 8... Rotating nut 14... Step motor

Claims (1)

[Scope of Claim] A punch drive device for feeding a punch for pressing the end of a pipe to a processing position by a ram shaft, wherein a stopper having a surface substantially perpendicular to the ram shaft is provided integrally with the ram shaft; A reciprocating member fitted externally on the ram shaft and reciprocating in the axial direction of the ram shaft is prevented from rotating, and the reciprocating member is provided with a surface that comes into contact with the stopper, and a male thread is provided on the outer periphery of the reciprocating member. A punch drive device comprising: a drive mechanism for reciprocating the reciprocating member by rotating a rotary member screwed onto the male screw of the reciprocating member.