JPS5874228A - Transfer press feedbar drive device - Google Patents

Abstract

PURPOSE:To easily change a stroke of a feed bar, and to change its motion optionally, by reading out stored feed bar position data in accordance with a slide position detecting signal, and controlling each motion of the feed bar. CONSTITUTION:In case of an automatic mode, a slide position signal from a slide position detector 41 is sent to a pulse controller 42, a position pulse and a direction signal are sent to a counter 63 through a counter 43 and multiplexer 66, and also a marker pulse is sent to load controllers 44, 64. At every one rotation of a press crank, count values of the counters 43, 63 are corrected by set values of setting devices 45, 65, and are sent to a multiplexer 46. The multiplexer 46 sends an output showing a slide position to an ROM51, and controls a feed servo-motor 11 in accordance with a feed position data. In the same way, by other ROM, a lifting and lowering servo-motor and a clamping servo-motor are controlled, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a feed bar drive device for a transfer press.

Conventional feed bar drive devices in transfer presses take power from the drive part of the press, change the direction of this power using gears and cams, and convert it into the desired movement, thereby feeding, returning, and raising the feed bar. and was driving the lowering and clamping and unclamping of the fingers.

This three-dimensional movement of the feed bar is configured to be linked by the power extracted from one drive unit, so it was impossible to operate each of the feed, lift, and clamp independently. . Further, since the movement of the feed bar is regulated by gears and cams, it is impossible to change its stroke, or even if it is possible, it is extremely difficult. The same can be said of feed bars that have their own drive source or feed bars that move two-dimensionally.

This invention is capable of independent operation and operation of feeding, raising, clamping, etc. of the feed bar, and
It is an object of the present invention to provide a feeder drive device for a transfer breath, which allows the strokes of these movements to be changed very easily.

Hereinafter, embodiments in which the present invention is applied to a rotary transfer breath will be described in detail with reference to the drawings.

FIG. 1 shows an overview of the feed bar and its drive mechanism, and illustrations of the breath slide and other components of the rotary transfer press are omitted. The feed bar (1) has an annular shape, and between its inner peripheral surfaces,
A retaining plate (3) passing through the center is fixedly attached. At the center of the feed bar (1), attach the retaining plate (3) to the support shaft (
2I passes through the top and bottom and is fixed. The support shaft (21) is rotatably and vertically supported by a bearing (not shown).

;,・,1 74-7;,<,,,,-1”l K 4i・location 1 corner 0
A clamping mechanism with spacing j a K fingers (4) is provided. This clamping mechanism consists of the feed bar (1)
A pair of gears (5A) (5B) that are freely rotatable and mesh with each other, a pair of links (6) fixed at one end in the center of these gears (5A) and extending outward ), and one end connected to the other end of these links (6), intersecting each other at their midpoints and being pivotally connected.
It is composed of a pair of links (7), and a finger (4) is provided at the other end of the link (7). One gear (5A)
is rotated by the required angle by the clamp drive mechanism circle described later, the finger (
4) are moved toward or away from each other, and the product tsl is clamped or unclamped. Gear (5
A) The rotation of (5B) is transmitted to the adjacent clamping mechanism by a link (8) attached to the gear (5B) and a link (9) connected thereto. Similarly, power is sequentially transmitted to adjacent clamp mechanisms, and the fingers of all the clamp mechanisms interlock to simultaneously perform clamping and unclamping operations.

The feed drive mechanism 0■ is a feed servo motor (11),
A speed reducer that reduces the rotation of the motor (11) +121. It consists of a pinion [31] fixed to the output shaft of the reducer (12), and an arc-shaped rack (141) fixed to the inner peripheral surface of the feed bar (1), and the pinion (131 is connected to the rank (141). They are engaged. Servo e motor ti
ll is 11: By rotating in the opposite direction, the feed bar (
1) is the place! Rotates forward and backward by angle. This causes the product [81] clamped by the finger (4) to be sent to the next station, after which the finger (4) is returned to its original position for the feeding operation of the next product (S).

The elevating drive mechanism ■ includes two elevating servo motors (211, a reducer that decelerates the rotation of the motor (21), and a pinion 13 fixed to the output shaft of the reducer).
, and a rack (goods) rotatably connected by a support shaft (2; jointed at the upper end) and movably guided and supported on an extension of the support shaft (21), and the rack (goods) and The servo motor (21) rotates forward and backward, causing the feed bar (1
) is raised and lowered.

The clamp drive mechanism (to) is provided on the holding plate (3), and includes a clamp servo motor (2) and a motor (3) provided on the support member (to) fixed on the holding plate (3).
A reducer (to) that decelerates the rotation of 1), a gear (to) fixed to the output shaft of the reduction mc@, a gear meshing with this gear (to) and rotatably provided on the holding plate (3) (To)
, a link (3513i1.・and both links C) with one end fixed to the center of the gear (goods) and gear 6
(Consists of a link connecting the other end of 51CIfl. When the servo motor 01) rotates forward and backward, the gear C (31641, link (to) - gear 6 - (5B) is It is rotated in the forward and reverse directions by a required angle, and the clamping and unclamping operations are performed as described above.

FIG. 2 shows the stroke curve tAl of the press/slide with respect to the press crank angle, the feeding of the feed bar, and the vertical stroke curve (Al) (A2).

and the clamping motion curve (A3) of the finger. When the slide is near top dead center, the product is being conveyed to the next station (in a clamped and raised state). When the product is fed above the next station, the feed bar is first lowered and then the product is unclamped. At this time, the winding and feeding operations are stopped.

When the unclamping of the product is completed, the feed bar begins to return.Then, the slide reaches the bottom dead center and the product is formed.The feed bar returns to its original position, and the clamping of the product by the fingers begins. When clamping is completed, the feed bar rises and starts feeding again.

The feeding and raising/lowering of the feed bar in conjunction with the movement of the press slide as well as the clamping operation of the fingers are achieved by the control device shown in FIG. There are three modes: automatic, linked manual, and independent manual.Automatic mode means that the feed bar performs lifting, feeding, lowering, unclamping, return, and clamping operations in synchronization with the press/slide position. It is controlled according to curves (A1) to (A3) shown in FIG.

Interlocking manual mode means that the feed bar can be raised, fed, and lowered regardless of the position of the press/slide.

The unclamping, returning, and clamping operations are performed in conjunction with each other.
) to (A3).

Single manual mode means that the three operations of the feed bar, namely feed (return),
It allows lifting and lowering and clamping (unclamping) to be carried out independently, and is controlled by a constant value irrespective of the curves (A1) to 3) in FIG.

In FIG. 3, a slide position detector (411) receives a slide position signal indicating the amount and direction of rotation of the press crank, and a display indicating that the slide has reached a predetermined position.
This outputs marker pulses. The slide position signal consists of two series of pulses (in-phase and B-phase) with a phase difference of 90°, and the press/press position is determined by the pulse interval.
The rotation speed of the crank is represented by the rotation direction by the order of pulses of each phase. The slide position signal is sent to the pulse controller (421). This controller i4Z is
A slide position pulse having a frequency proportional to the rotation speed of the press crank and a direction signal representing the rotation direction thereof are output. These signals are sent to a counter (63) via a counter (431) and a multiplexer (66).The marker pulse represents the reference position of the slide, for example when the press crank angle is around 270°. It is set to occur sometimes.Co(7)
The marker pulse is the load controller f44+ (
64).

Counter f431 (63) is 1, a reversible ring counter, and when the direction signal indicates forward rotation, it becomes an up counter and adds up the input slide position pulse, and when it indicates reverse rotation, it becomes an up counter. It becomes a down counter and subtracts the position pulse. Generally, in most cases, the press crank is driven to rotate in the forward direction, and only in special cases is it driven in the reverse direction. ring counter (
The maximum count value when 431 (63) counts up and returns to the initial state is preferably equal to the total number of slide position pulses generated when the press crank makes one revolution, but it does not necessarily have to be the same. There is no problem since the value is corrected by the setter (49 (65)) every rotation of the press crank.The counter f431 (63) is provided with a count value setter +451 (65).
1 setter +451 (65) lQt, corresponds to the reference position of the slide; 1. The count values are set in advance. When the marker pulse is output, a load command is output from the load spring controllers (44) and (64), and the set count value of the setting device +451 (65) is set in the counter (4) (63). Counter 1431 (63
) is corrected by the set count value of the setter +451 (65), so even if there is a miscount, it is prevented from being added up and causing a large error. The output of counter 13 (63) is sent to the multiplexer (
Sent to 461.

The pulse generating circuit (61) simulates the movement of the press/slide in the linked manual mode, and generates a series of pseudo position pulses. The frequency of this position pulse is variable. The output pulse of the generation circuit (6I) is generated by the gate circuit (
62). The gate circuit (62) is controlled by an interlocking manual mode drive switch (not shown). This switch is.

It consists of a forward rotation pushbutton/switch and a reverse rotation pushbutton/switch. When the forward rotation pushbutton/switch is pressed, a pseudo position pulse and a direction signal indicating forward rotation are output from the gate circuit (62), and when the reverse rotation pushbutton/switch is pressed, a pseudo position pulse and a direction signal indicating forward rotation are output. A position pulse and a direction signal representing reversal are output. These pulses and signals are sent to a multiplexer (66).

Each of the multiplexers +46 (66) selects and outputs one of the two input signals, and is controlled by an automatic/interlocked manual mode setting switch (not shown). When the automatic mode is set by the previous switch, the multiplexer (461 selects and outputs the output of the counter (431), and multiplexer 06
Select the output of the μ pulse controller (421) and send it to the counter (63).

Conversely, when the linked manual mode is set, the multiplexer (46) selects the output of the counter (63), and the multiplexer (66) selects the output of the gate circuit (62). Therefore, in the case of automatic mode, the 1-car counter +431 (63) is the pulse controller (
Count the slide position pulses from 421. Therefore, when the automatic mode is switched to the linked manual mode, the count value of the counter (63) represents the slide position at that time, and in the linked manual mode, the count value continues from the last position of the slide in the automatic mode. This makes it possible to perform interlocked manual operation of the feed bar.

In the linked manual mode, the press/slide is not driven, so the marker pulse is not generated from the position detection -"+411. Therefore, the marker pulse is not generated from the position detection -"+411. Set the count value in the setting device (65), and when the feed bar remains at the set reference position, load/unload with the switch.
By giving a command to the controller (64) and setting the set count value to the counter (63), the counter (6
It is preferable to correct the count value in 3).

In the automatic and linked manual modes, the output of the counter (43) or (63) indicating the slide position or pseudo position is passed through the multiplexer (461) to 170M (read-only memory) 6+1 (51B) and (
51C) respectively. ROM (511 is used as a feeding position signal generator for the feed bar, and the feed bar feed position signal generator shown by the curve (AI) in Fig. 2 corresponds to the slide position (breath angle). Feed position data is stored in advance.The signal output from the multiplexer addresses the feed bar feed position data storage location corresponding to the slide position represented by the signal, and the feed position data there is read out. Then, based on this feed position data, the feed servo motor (1
1) is controlled. ROM (51B) and (51C)
Similarly, the vertical position signal fF of the feed bar is used as a generator and clamp position signal generator, and the curves (A2) and (A3) in Fig. 2 correspond to the slide position.
Lifting position data and clamp position data indicated by are stored in advance.

The feed servo motor (11) is driven by its drive circuit ω. The rotation speed and amount of rotation of the servo motor (II) are detected by a feed bar feed speed detector (571) and a feed bar feed position detector ■.The output of the speed detector f571 is fed back to the drive circuit section. It can be used to increase feedback gain. The position detector (support) is the detector (41)
Similarly, a position signal representing the amount and direction of rotation is output, and this signal is sent to the pulse controller 1591. From the pulse e controller, a position pulse with a frequency proportional to the rotation speed and a direction f1 representing the rotation direction are generated.
The counter (60) is also a reversible ring counter, and its count value represents the current feeding position of the feed bar.

The feed position data read from the ROM 4511 and the count output representing the current feed position of the counter field are sent to the subtraction circuit 6, where the deviation of both positions 1i- (takes both positive and negative values) is calculated. This deviation signal is converted into an analog signal by the DA converter circuit Sho 1,
Automatic mode setting switch (7g) and amplifier (55)
The signal is then sent to the drive circuit ■.

The drive circuit ω is set so that the above deviation becomes O.
Control the motor (11). The servo motor 11 is
Controlled by such a feedback loop, the feedbar is controlled according to feed position data stored in ROM+511.

Accurate feed drive.

The single manual mode is set by its setting switch σ3) (74), and the feeding speed of the feed bar in the single manual mode is set by the setting device C71) (72). The setting devices, C71) and (72) are each a potentiometer, for example. When carrying out single child movement in the forward direction, the switch σ3) is turned on and the other switches σ4)C5) are turned off.

At this time, the voltage set by the setting device σ1) is input to the drive circuit 伽) via the amplifier □□□), and the servo motor (Ill) is controlled by this set voltage. Single manual feed in the reverse direction switch (74)
is turned on, and the other switches (73) and (75) are turned off. In this case, the set voltage of the setting device C72) is input to the drive circuit. The set voltages of the setters (71) and (72) have opposite polarities. Of course, in the automatic mode, the switch (75) is turned on, and the switch (75) is turned on.
3) (74) is turned off.

The counter is provided with a count value setter 5) and a load controller (84). When the power is turned off or there is a power outage, the current feed position of the feed bar counted by the kakanta transfer is erased. After this, when the feed bar is restarted, the % feed bar is returned to its standard feed position, for example, to its return limit. And setting device 05)
Since the count value corresponding to the reference feed position is set in , and the load command is input to the load controller,
The set standard count value is set in the counter [stock].

This makes it possible to restart the feeding operation of the feed bar.

Obtain the same type of signal as the marker pulse described above from the feed position detector □□□, for example, a marker pulse representing the detection of the return limit position of the feed bar, input this marker pulse to the load controller, and set it. It is also possible to set a count value corresponding to the return limit position in the counter 05), and to correct the count value of the counter ((to)) every cycle of the foot feed operation. be.

The vertical drive and clamp drive of the feed bar are controlled using exactly the same concept, and the configuration of each circuit is the same.
B+ and FCI will be respectively attached and the explanation will be omitted. However, the setting devices (85B) and (85C) are set with count values corresponding to reference positions for lifting and clamping, such as the lowering limit and clamping limit positions, and when the feed bar reaches these positions, A load command is given to each load controller (84B) (84C).

In the automatic mode or the linked manual mode, the signal representing the slide position ir1 or pseudo position output from the multiplexer (461) is sent to each RoM5n (51B) (5
1C) and the position data of the corresponding feed bar is read out, so that the feeding, lifting and clamping operations of the feed bar are linked.

In addition, in the independent manual mode, the setting device (71) C71 (719) or C (
72) C72B) (72C) The feed bar is controlled by the value set by K, and these set values can be set completely separately, and switch C73) (73B)
C73C) C74) C74B) (74C) Since all the steps are performed separately, the feeding, lifting and clamping operations of the feed bar are independent from each other.

This invention can be applied to transfer presses other than rotary transfer presses, and can also be applied to transfer presses that perform two-dimensional interlocking, that is, feeding and clamping other than lifting and lowering. Not even.

According to the present invention as described in detail above.

Position data for feed bar feeding, clamping, and, if necessary, lifting/lowering are stored in advance in correspondence with the slide position. and.

The stored feed bar position data is read out in response to the slide position detection signal or the slide pseudo position signal to control each movement of the feed bar. therefore,
By changing the stored position data of the feed bar, it is possible to easily change the stroke of the feed bar as well as the interlocking thereof. In addition, it is also possible to drive each movement of the feed bar separately, allowing independent manual operation.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the feed bar and its drive mechanism, and FIG. 2 is a press slide and frame. A graph showing the stroke curve of the feed bar, and FIG. 3 is a block diagram showing the drive control circuit of the feed bar.〇(1)...feed bar, (4)...finger,
+1010・Feeding drive mechanism, tll)...Feeding servo motor, ■...Elevating drive mechanism, (21)...
Lifting servo* % -ta, (to)...Clamp drive mechanism, C311...ri (51C)...ROM
(feed, lift and clamp position signal generator), (52
) (52B) (52C) --- Subtraction circuit, @ (5
6B) (56C)... Servo motor drive circuit. (Support) (58B) (58C) ...Feed bar position detector, (ω(60B) (60C) see Kara・7, C71)C2) (71B) C72B)C
71C) C72C) ---74-Toha series R determiner, (73) (74) (73B) C74B) C73
C) (74C) ---Independent manual mode setting switch, (75)σ5B) (75C)...Automatic mode setting switch◎

Claims (1)

[Claims] A slide position detector that detects the position of the slide and outputs a position signal corresponding to each position, a pseudo position signal generator that outputs a pseudo position signal of the slide, and a feed bar corresponding to each position of the slide. A feed bar position signal generator that stores position data in advance and outputs the stored position data according to either the input slide position signal or pseudo position signal, and drives the feed bar based on the feed bar position data. A feed bar drive control circuit that inputs a manual operation f1+ signal to the feed bar drive control circuit, and a feed bar drive device for a color transfer press.