JPH1128542A - Hitch feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the operating speed of a hitch feeder and to improve workability. SOLUTION: On a rotary body 7 rotating synchronous with a crank shaft, an eccentric pin 10 is arranged freely rotable with its shaft in parallel. A pinion 11 with the number of teeth 1/2 times that of an internal gear 9 of a casing 5 is arranged on the eccentric pin 10 and is engaged with the gear. The eccentric pin 10 is equipped with an eccentric part 12 with a throw of eccentric 1/2 times effective diameter of a pinion 11. A rocking lever 13 is provided which is connected to the eccentric part 12 at one end and at the other end has an erecting pin 14 having a slider 15 in sliding fit with a groove 23 of an arm 22 of a driving shaft 4. Then, a supporting pin 16, which is freely slidable in the longitudinal direction of the rocking lever 13 and freely rockingly supporting the rocking lever 13, is made to shift its location freely by a male screw 19 connected to a serbo-motor 21 and a female screw 20 of a supporting block 17, and thus the rocking of a hitch lever connected to the driving shaft 4 is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press machine for intermittently feeding a coil material by hooking a claw in the hole when manufacturing a heat exchanger fin or the like in which a large number of holes are pressed in a coil material. With regard to the hitch feeder attached to the above, it is possible to set an arbitrary feed length remotely and even during the press operation, which is effective for increasing the speed of the press and improving the workability.

[0002]

2. Description of the Related Art As shown in FIG. 6, when a fin of a heat exchanger is manufactured, a large number of hole rows are formed by pressing a coil material, and a pitch of a hitch feeder is formed in a hole having a constant pitch P or S. Was sent and cut. Usually, the number of fin holes differs for each heat exchanger.
In a relationship where multiple rows (for example, x) are punched at a time,
The number of holes (for example, y) in the feed direction of the fin is not always an integral multiple of x. That is, y is not always an integral multiple of x. For this reason, it is necessary to change the last feed length of the fin 1A prior to the cutting operation of separating the fin 1A from the fin 1B when the piercing of the fin 1A is completed. In the example shown in FIG. 6, it is necessary to change the feed length such as ・ · P for pitch P and ／ · S for pitch S.

[0003] In the hitch feeder in the prior art,
In order to change the feed length during operation of the hitch feeder, there is a type in which a ball screw is screwed into a female screw of the hitch feeder and the ball screw is driven by a servomotor. In addition, the slider of the pin provided at one end is slid into the radial groove of the arm of the drive shaft having the hitch lever for driving the hitch feeder, the middle is received by the fulcrum pin, and the other end is reciprocated by a certain length. A swing lever connected to a mechanism for moving is provided, a cylinder for moving the fulcrum pin in the longitudinal direction of the swing lever is provided, both ends of the movement of the fulcrum pin are determined, and the feed length of the hitch feeder is, for example, 1 / P. Some have a position-adjustable stopper that can be 2 · P or 2/3 · S.

[0004]

In the prior art in which the above-mentioned ball screw is driven by a servomotor, the servomotor is controlled in synchronization with the crank angle of the press machine, and the hitch feeder is reciprocated by a required feed length. It is possible to give exercise and change the feed length on the way. However, performing all feed and return operations by rotating a ball screw with a servomotor is limited in obtaining a high feed and return speed, making it difficult to increase the speed of the hitch feeder.

Further, in the prior art device provided with a position-adjustable stopper, the swing lever is swung about the fulcrum pin to reciprocate the drive shaft of the hitch lever. Conversion is easy. However, there is a limit problem of speeding up by moving the fulcrum pin with a fluid cylinder with a control delay, and workability is poor because the position of the stopper is manually adjusted, especially when continuously manufacturing different fins. However, there is also a problem that the press work must be temporarily stopped for adjusting the feed length to be changed.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, perform position control of a fulcrum pin of a swing lever by a servomotor, and control the servomotor by a control program.
It is an object of the present invention to provide a hitch feeder that seeks higher speed and improved workability.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a hitch feeder which reciprocates by hooking a claw on a pressed hole and feeds a coil material by a required length. One end is connected to a drive shaft rotatably supported by a case and having a hitch lever for driving a hitch feeder, and an output shaft having a radial groove in an arm provided at the other end, and protrudingly provided at one end. The slider of the pin is slid into the groove of the arm of the output shaft, and is provided in a plane parallel to the arm, and the middle is rotatably supported in the plane by a fulcrum pin and slidably supported in the longitudinal direction, The other end of the swing lever is reciprocally driven at a constant stroke in a direction crossing the longitudinal direction in a plane in synchronization with the crank angle of the press machine, and is provided in the longitudinal direction of the swing lever, and is directly connected. Ball screw Screwed into the internal thread provided on the point pin comprises a servo motor for position control to move freely pivot pin in the longitudinal direction of the swing lever.

[0008]

1 to 5 show an embodiment of a hitch feeder according to the present invention. 1 to 3 show:
1 shows a conversion mechanism 2 that converts the rotation of an input shaft 3 connected to a crankshaft of a press machine via a gear or the like and gives reciprocating rotation to an output shaft 4. A small bevel gear 6 is provided on the input shaft 3 rotatably supported by the case 5, and meshes with a large bevel gear 8 of a rotating body 7 rotatably provided on the case 5, so that the rotating body 7 rotates in synchronization with the crankshaft. It has become.

The case 5 facing the outer periphery of the rotating body 7 includes
An internal gear 9 is provided. An eccentric pin 10 is rotatably provided on the rotating body 7 with their axes parallel to each other. A gear 11 having half the number of teeth of the internal gear 9 is provided on the outer periphery of the eccentric pin 10 corresponding to the internal gear 9. And the gear 11 meshes with the internal gear 9. The eccentric pin 10 is provided with an eccentric portion 12 protruding from the rotating body 7, and the amount of eccentricity of the eccentric portion 12 from the center of the eccentric pin 10 is １ ／ of the pitch circle diameter of the gear 11.

An oscillating lever 13 having one end rotatably connected to the eccentric portion 12 of the eccentric pin 10 has a pin 14 erected in parallel with the eccentric pin 10 at the other end. A slide 15 is provided. A fulcrum pin 16 is provided at an intermediate portion of the swing lever 13 so as to be slidable in the longitudinal direction and is parallel to the eccentric pin 10. The fulcrum pin 16 is rotatably held by a fulcrum block 17. Fulcrum block 17
Are movably guided by guides 18, 18 on one moving end of the eccentric portion 12, that is, on a straight line passing through the feed completion side of the hitch feeder, that is, on a straight line L1 shown in FIG.

A ball screw 19 provided on the case 5 in parallel with the straight line L1 is screwed with a female screw 20 provided on the fulcrum block 17, and a servo motor 21 fixed on the case 5 is directly connected to the ball screw 19. . As shown in FIG. 3, the swing lever 13 has a circular cross-sectional shape obtained by cutting the upper and lower parts of the circle, and the remaining arc portion is slidably held on the fulcrum pin 16 from both sides. Therefore, when the servo motor 21 is rotated to move the fulcrum block 17 along the guides 18, 18, the position of the fulcrum pin 16 can be freely changed in the longitudinal direction of the swing lever 13.

The output shaft 4 is rotatably held by the case 6 in parallel with the rotating body 7, and has an arm 22 at an end on the side facing the swing lever 13, and faces the swing lever 13 of the arm 22. The surface is provided with a radial groove 23 in which the slider 15 is fitted.

When the rotating body 7 rotates in synchronization with the crankshaft by the conversion mechanism 2, the eccentric pin 10 is driven to rotate by the engagement between the internal gear 9 and the gear 11, and the eccentric portion 12 It reciprocates up and down. The swing lever 13 connected to the eccentric part 12 swings about the fulcrum pin 16 as a center of rotation, thereby
2 is driven to swing, and the output shaft 4 swings and rotates.

As shown in FIG. 2, if the position of the fulcrum pin 16 in FIG. 1 is determined by controlling the rotation of the servomotor 21 with reference to the time when the swing lever 13 is placed on the straight line L1, the output shaft 4 The swing rotation angle can be determined accurately, and the feed length of the hitch feeder can be determined. Since the rotation of the servo motor 21 can be controlled even during the press working, if the rotation of the servo motor 21 is controlled within an appropriate crank angle range, the feed length of the hitch feeder can be freely changed during operation. Can be matched at both ends of the feed length.

FIG. 4 shows a press machine 24 equipped with the conversion mechanism 2. The conversion mechanism 2 in which the input shaft 3 is connected to the rotating shaft 25 of the press machine 24 connects the output shaft 4 to the hitch lever 26,
26 is connected to a drive shaft 27 having the same. The hitch levers 26, 26 are a hitch feeder (not shown) having claws.
Is driven to reciprocate.

FIG. 5 shows an example of the case where the claw 28 is hooked on the hole of the coil material 1 and sent. The feed is performed by P during a crank angle of 270 ° to 90 °, and a fulcrum between 90 ° and 270 °. Move the pin 16 to the 1/2 P feed position, and then, from 270 ° to 90 °,
The fulcrum pin 16 is moved again by the distance P from the next 90 ° to 270 °, and is thereafter moved by the required number of times P. When the rotation speed of the crankshaft of the press machine is 300 rpm, one rotation is 0.2 seconds, and the time for moving the fulcrum pin 16 is within 0.1 second. In this case, the servo motor is electrically controlled and has a fast response, so that no problem occurs.

The servo motor control program is as follows:
Since various things can be obtained by the design, for example, the movement of the fulcrum pin 16 corresponding to P and 1 / 2.P shown in FIG. 6, and the number of repetitions and S and 2/3.
By programming the movement of the fulcrum pin 16 corresponding to the above and the number of repetitions corresponding to the product, continuous production of different fins is possible without stopping the press working.

[0018]

As is apparent from the above description, according to the present invention, it is possible to drive the output shaft for swinging the hitch lever.
Since the swing lever that swings around the fulcrum pin is used, the feed length can be changed quickly by moving the fulcrum pin, so that it is possible to cope with high-speed press working. In addition, since the fulcrum pin is moved by the servo motor, the fulcrum pin can be moved during operation in addition to the quick movement, and if the servo motor is program-controlled, the production of different fins can be performed during continuous operation. Can also be manufactured. Further, the control of the servomotor can be performed only by setting data on the operation panel, so that workability can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a conversion mechanism of a hitch feeder according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows AA in FIG.

3 is a view taken in the direction of arrows BB in FIG. 2;

FIG. 4 is a front view of a press machine equipped with a hitch feeder.

FIG. 5 is a timing chart showing a feed mode.

FIG. 6 is a view showing a mode of a feed pitch when fins of a heat exchanger are manufactured.

[Explanation of symbols]

1 is a coil material, 1A and 1B are fins, 2 is a conversion mechanism, 3
Is an input shaft, 4 is an output shaft, 5 is a case, 6 is a small bevel gear, 7 is a rotating body, 8 is a large bevel gear, 9 is an internal gear, 1
0 is an eccentric pin, 11 is a gear, 12 is an eccentric part, 13 is a swing lever, 14 is a pin, 15 is a slider, 16 is a fulcrum pin,
17 is a fulcrum block, 18 is a guide, 19 is a ball screw, 20 is a female screw, 21 is a servomotor, 22 is an arm, 23 is a groove, 24 is a press machine, 25 is a rotary shaft, 26
Is a hitch lever, 27 is a drive shaft, and 28 is a pawl.

Claims (1)

[Claims] 1. A hitch feeder which reciprocates by hooking a claw in a pressed hole and feeds a coil material by a required length. A) A hitch lever rotatably supported by a case and driving a hitch feeder. One end is connected to a drive shaft having
An output shaft having a radial groove in an arm provided at the other end; and b) a slider of a pin protruding at one end is slidably fitted into the groove of the arm of the output shaft so as to be parallel to the arm. It is provided in a plane, the middle is rotatably supported in the plane by a fulcrum pin in the plane, and slidably supported in the longitudinal direction, and the other end is synchronized with the crank angle of the press machine in the plane in the longitudinal direction. A swinging lever reciprocally driven at a constant stroke in a direction intersecting with the swinging lever; c) a ball screw provided in the longitudinal direction of the swinging lever and directly connected to a female screw provided on the fulcrum pin; A hitch feeder, comprising: a servomotor that moves a fulcrum pin freely in a longitudinal direction of the swing lever to control a position thereof.