JPH01113129A - Spinning machine - Google Patents

Abstract

PURPOSE:To improve the working accuracy and working efficiency by connecting a servomotor respectively to the hydraulic cylinder operating a roller base and carriage and driving each rack gear of vertical feeding and horizontal feeding directions by the servomotor. CONSTITUTION:A drawing roller 26 is freely rotatably provided on the tip of an arm 27 and the hydraulic cylinders 29, 31 driving a roller base 24 and carriage 28 are arranged as well. Moreover pinion gears 56, 38 and rack gears 59, 41 are respectively arranged for the cylinders 29, 31 as well. Each rack gears 59, 41 are driven via the servomotors 54, 37 connected to the hydraulic cylinders 29, 31 and rough working and finishing are executed by controlling the drawing roller 26 by executing teaching in advance. Then, a production process comes in by stored working procedures to execute forming at high speed. Due to the servomotors 54, 37 being used the working accuracy is improved and the production efficiency is improved by high speed working.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a spinning machine that performs drawing processing using a drawing roller while rotating a metal plate.

[Prior Art] FIG. 10 shows the main parts of a conventional spinning machine.

In FIG. 10, 1 is a mold fixed to a main shaft 5, 2 is a tailstock shaft, and a disc-shaped material 3 made of a metal plate is rotated between the mold 1 and the tailstock shaft 2.

Reference numeral 6 denotes a squeezing roller, which is rotatably attached to the tip of arm 7.

The arm 7 is attached to a carriage 8 so as to be movable back and forth, and the carriage 8 reciprocates along a guide frame 10 in a direction perpendicular to the direction of movement of the arm 7. This carriage 8 is driven by a hydraulic cylinder 9. be done.

A fixed gauge 11 is fixed to the guide frame 10, and a movable gauge 1 that rotates around a shaft 13 is attached to the fixed gauge 11.
2 is attached, and this gauge 12 is rotated by a hydraulic cylinder 14.

Further, a servo valve 15 is provided at the rear end of the arm 7, and its operating piece 16 is brought into contact with the gauge 11.12, and the servo valve 15 controls the hydraulic cylinder for driving the arm 7 to operate the squeezing roller 6. Make it move by adjusting the gauge to 11.12.

In the above conventional example, the hydraulic circuit of each hydraulic cylinder 9.14 is controlled by an electrical program control method, and the movable gauge 12 is initially rotated at a constant angle in the direction of the arrow every time the carriage 8 makes a reciprocation. Gradually insert material 3 into mold 1 as shown by the chain line.
Finally, the working piece 16 is made into a fixed type to perform the final drawing of the material 3.

[Problem that the invention seeks to solve]

In the conventional processing machine as described above, the squeezing roller 6 is moved along with the movable gauge 12 or the fixed gauge 11, so it is necessary to prepare gauges 11 and 12 according to the mold 1.

Furthermore, since the orientation and elongation rate of the various metal plates that are the raw materials cannot be specified, there is a problem in that it takes a long time to set the mold 1 and the gauges 11 and 12.

[Means for solving problems]

In order to solve the above problems, the present invention includes a roller stand that moves in the longitudinal feeding direction together with a squeezing roller operated by a vertical feeding hydraulic cylinder and a horizontal feeding hydraulic cylinder;
A transverse feed table that moves this roller stand in the cross feed direction is provided, and a rack gear for vertical feed and a horizontal feed table that move in the longitudinal and cross feed directions by meshing with a pinion gear driven by a servo motor fixed to each hydraulic cylinder. A rack gear for feeding is provided, and the roller stand and the transverse feed table are designed to detect slight misalignment between the roller stand and the rack gear for vertical feed, and a slight misalignment between the transverse feed stand and rank gear for transverse feed, and to reduce this misalignment. A vertical feed servo valve and a horizontal feed servo valve are provided to actuate each hydraulic cylinder, and each servo motor is provided with a pulse encoder that inputs the respective rotation angle as a pulse signal to the positioning controller. A teaching device is provided that manually sends a drive signal to each servo motor, drives the servo motor, moves the squeezing roller in a fixed order, and memorizes the work procedure in the positioning controller and sequencer. The roller table and cross feed table are driven using information and work procedures stored in the sequencer, and in the finishing process, the vertical feed cylinder is operated using hydraulic pressure limited to a constant pressure by a relief valve to perform finishing processing. It is something.

[Effect]

This invention has the above configuration, and teaching is performed first.

In other words, with the material set in the mold and the material rotating together with the mold, the teaching operation device is operated to drive each pinion gear using the vertical and horizontal feed servo motors, and move each rack gear. When this happens, each servo valve is driven, the hydraulic cylinder is activated, and the squeezing roller is operated.

Through this operation, the material attached to the mold is rough-processed, and then finished.

During finishing, the vertical feed servo motor and pinion gear are free, and the hydraulic pressure applied to the vertical feed hydraulic cylinder is maintained at a constant pressure by the relief valve, so that the squeezing roller is pressed against the material at a constant pressure. In this state, finish machining is performed using the servo motor and servo valve for horizontal feed.

The rotational speed of each servo motor during the above teaching operation is input to the positioning controller as a pulse signal from each pulse encoder, and this signal is stored in the positioning controller as a numerical value indicating the position of the aperture roller from the origin.

When the teaching operation is completed, the product drawn by the teaching operation is removed from the mold, a new material is set in the mold, and the production process begins.

In the production process, each servo motor is driven based on the work procedure information from the sequencer and the position information from the positioning controller, and each servo valve works accordingly, and each hydraulic cylinder works to narrow down the same movement as during teaching. It is applied to rollers to roughly process the material.

When the rough machining of the material is completed, a signal from the sequencer causes the vertical feed hydraulic cylinder to press the squeezing roller against the material with a constant pressure, and the positioning controller controls the horizontal feed hydraulic cylinder to perform finishing machining, and the product is finished. It will be completed.

〔Example〕

In the embodiment shown in FIG. 1, 21 is a mold fixed to a main shaft 25, 22 is a shaft, and a disc-shaped material 23 made of a metal plate is rotated between the mold 21 and the shaft 22.

26 is a squeeze roller, which is rotatably attached to the tip of arm 27.

The arm 27 is fixed to a roller stand 24 on a cross-travel table 28, and this roller table 24 is attached to a guide frame 24 on a cross-transfer table 28.
2, and is driven by a hydraulic cylinder 29 for vertical feeding.

Further, the cross-transfer table 28 is moved along the guide frame 30 by the roller table 24.
It reciprocates in a direction perpendicular to the forward and backward direction of the
is driven by a hydraulic cylinder 31 for lateral feeding.

A bracket 35 is fixed on the guide frame 30. This bracket 35 is bent as shown in FIG. 4, and an electromagnetic clutch 36 and a servo motor 37 are attached to its upper end, and a pinion gear 38 is fixed to the output shaft of the electromagnetic clutch.

In addition, the guide stand 3 fixed on the horizontal part of the bracket 35
9, a moving rail 40 parallel to the cylinder 31 is slidably mounted, and a transverse feed rack gear 41 fixed thereon is meshed with the pinion gear 38.

Extremely smooth operation can be obtained by using linear ball bearings manufactured by THK Co., Ltd. (Kisha, Tokyo) as the guide stand 39 and moving rail 40.

Reference numeral 45 in FIGS. 2 and 5 is a support stand fixed on the traversing table 28, and a servo valve 46 for traversing and a guide stand 39, which is the same as the guide stand 39, are fixed on this stand 45.

A lever 48 is provided on the support base 45, as shown in FIG. 5, which can swing from a shaft 47 as a starting point. The lever 48 is slidably fitted into the attached slide bearing 50, and the operating piece 51 of the servo valve 46 is brought into contact with the side of the lever 48.

The servo valve 46 is a spring retract type mechanical servo valve, and when the operating piece 51 is pushed to the left by the lever 48 as shown in FIG. When it moves, the internal spool is pushed by the spring and moves to the right together with the action piece 51.

53 in FIG. 3 is a bracket fixed to the guide frame 32;
A servo motor 54 and an electromagnetic clutch 55 are fixed to this bracket 53, and a pinion gear 56 is fixed to the output shaft of the electromagnetic clutch 55.

Reference numeral 58 in FIG. 3 is a moving rail parallel to the moving direction of the roller stand 24, which is movably supported on the bracket 53 and the roller stand 24 by the same means as the moving rail 40, and fixed on this moving rail 58. The vertical feed rack gear 5.S is meshed with the pinion gear 56.

In FIG. 3, 61 is a vertical feed servo valve fixed to a support base 62 on the roller base 24, and 63 is a swingable lever whose lower end is attached to the support base 62 by a shaft. The action pieces 64 of the two are brought into contact with each other. Above servo valve 6
1 also has the same structure as the servo valve 46.

A slide bearing (not shown) attached to a connecting member 65 fixed to the end of the moving rail 58 is connected to the lever 6.
3, but the structure of this part is the same as that of the connecting member 49.
The connection structure between the lever 48 and the lever 48 is the same.

In the hydraulic circuit diagram shown in FIG. 6, 70 is a hydraulic unit consisting of a hydraulic pump, its drive motor, oil tank, etc.;
Reference numeral 1 denotes a hydraulic circuit for the vertical feed hydraulic cylinder 2S, which communicates with the boats before and after the hydraulic cylinder 2S via a servo valve 61, and has a solenoid valve 72 in the middle thereof for communicating or cutting off the hydraulic circuit 71. .

Further, another finishing solenoid valve 73 is connected to a finishing hydraulic circuit 74 that communicates with the boats before and after the hydraulic cylinder 29.
One boat of this valve 73 is communicated with the tank side of the circuit 71, and the other boat is communicated with a relief valve 75 communicating with the pump boat and tank boat of the hydraulic unit 70.

A hydraulic circuit 77 communicating with the boats before and after the transverse feed hydraulic cylinder 31 is communicated with the tank boat and pump boat of the hydraulic unit 70 via the servo valve 46.

Each of the above-mentioned servo motors 37 and 54 uses a pulse motor that is a set of an actuator and a driver, and each has a pulse encoder 43 and 44 attached, and has the function of rotating in response to a pulse signal and the function of emitting a pulse signal by rotation. are doing.

In the electrical circuit diagram shown in FIG. 7, 80 is a teaching operating device, and when the circuit corresponding to the vertical and horizontal operations of the operating handle 81 is closed, the positioning controller using a microcomputer is connected via the teaching intermediate unit 82. The controller 83 is connected so that an operation signal is input thereto, and a circuit is configured in which the output of the controller 83 drives the servo motor 37.54 via a high speed counter 85.86.

Further, feed bank circuits 88.8S, 90, and Sl are provided for high-speed counters 85.86 and pulse encoders 43.44, respectively, as shown in FIG.

In addition, 92 and 93 in Fig. 7 are the transverse carriage 28,
A limit switch for the origin of the roller stand 24, 94.95 is a limit switch for safety during teaching operation, and S6 is a sequencer.

Next, to explain the action, first, as shown in Figure 1, the material 2
3, rotate the material 23 together with the main shaft 25, operate the operating handle 81 of the teaching operating device 80 shown in FIG. 7, send an operating signal to the intermediate unit 82 as shown in FIG. , and drive the servo motor 37.54 via the high speed counter 85.86.

The pinion gear 38 is rotated by the drive of the servo motor 37 via the electromagnetic clutch 36, and the rack gear 41 is moved.

When the rank gear 41 moves in this way, the moving rail 40 and the connecting member 4S that are integral with it move, and this member 49 tilts the lever 48 and moves the operating piece 51 of the servo valve 46, thereby switching the hydraulic circuit to the hydraulic cylinder 31. .

The above action causes the hydraulic cylinder 31 to operate and move the transverse carriage 28 in the direction of arrow a in FIG.

Since the above-described operation of the handle 81 also rotates the servo motor 54, the pinion gear 56 rotates via the electromagnetic clutch 55, and the movement of the rack gear 59 causes the coupling member 65 to rotate.
The lever 63 is tilted to move the operating piece 64, and the servo valve 61 operates the hydraulic cylinder 29 to move the roller stand 2.
4 is moved as shown by the arrow, so the aperture roller 26
molds the material 23 as shown in FIG. 1(A), and then returns the handle 81 to the neutral position, thereby returning the squeezing roller 26 to its original position.

By repeating the above-mentioned handle operation, the material 23 is gradually narrowed down as shown in FIG.

The above operation is performed by the hydraulic circuit 71 with the solenoid valve 72 open and the solenoid valve 73 closed in FIG. Then, the finishing hydraulic circuit 74 including the relief valve 75 is switched to, and the squeezing roller 26 presses the material 23 against the mold 21 by the cylinder 29, which operates under the hydraulic pressure limited by the relief valve 75, and is pressed by the handle operation as shown in FIG. A product 97 is molded as shown by the solid line.

The teaching operation by the operating handle 81 as described above is performed by the pulse encoder 43.44 shown in FIG.
5.86, it is fed back to the positioning controller 83 and stored as numerical information from the origin for each position.

In this way, the teaching is completed, and the roller table 24 and the transverse table 2
8 is returned to the origin, the main shaft 25 is stopped, the product S7 is removed from the mold 21, the next material 23 is set, and automatic operation begins.

When automatic operation starts, the position information from the positioning controller 83 and the information instructing the work procedure from the sequencer 96 are input to the servo motor 37.54 through the high-speed counter 85.86 as shown in FIG. In the same way, servo valves 46.61 operate and hydraulic cylinders 31.
29, the squeezing roller 2 moves in the same way as during teaching.
6 and perform drawing processing.

At this time, the solenoid valve 7 is also
2 opens and the electromagnetic valve 73 closes, and the squeezing roller 26 moves at a high speed by the high speed counters 85 and 86, so the rotation of the main shaft 25 is accelerated and high speed machining can be performed.

After forming the rough shape in this way, the solenoid valve 72 closes and the solenoid valve 73 opens in response to a signal from the sequencer S6, the solenoid clutch 55 is disengaged, and the finishing process begins with the squeezing roller 26, under the conditions that the product 97 is molded. Each part returns to original position 1.

〔effect〕

As described above, this invention is provided with a roller stand that moves in the vertical feed direction together with the squeezing roller and a cross feed stand that moves the 20 roller stand in the cross feed direction, and the roller stand and the cross feed stand are controlled by each hydraulic cylinder. A rack gear for vertical feed and a rack gear for horizontal feed that move in the vertical and horizontal feed directions by engaging pinion gears driven by servo motors fixed to each hydraulic cylinder. The roller table and the horizontal feed table are equipped with a hydraulic cylinder that detects slight deviations between the roller table and the vertical feed rack gear, and a slight deviation between the cross feed table and the horizontal feed rack gear, and moves the hydraulic cylinders in the direction to reduce this deviation. Since the machine is equipped with a vertical feed servo valve and a horizontal feed servo valve, the squeezing roller can be hydraulically driven by simply controlling a small servo motor, making it easy to process large materials. However, there are additional effects listed below.

Each servo motor is equipped with a pulse encoder that inputs the respective rotation angle as a pulse signal to the positioning controller. Furthermore, signals are input manually to the positioning controller and sequencer, and the servo motor is driven to keep the aperture roller constant. Since we have installed a teaching device that allows the positioning controller and sequencer to memorize work procedures by moving them in the order of Since the material is processed by driving the roller table and cross-feeding table, there is no need for a conventional gauge, and even if the product to be processed is changed, all that is required is re-teaching. This makes it extremely easy to change.

In the finishing process, the hydraulic pressure is limited to a constant level by the relief valve, and the vertical feed cylinder is used to perform the finishing process, so the pressure is automatically adjusted, there is no gap between the mold and the material, and the material is It can instantly respond to differences in hardness and thickness.

Some recent spinning machines use a vertical feed sequencer to determine numerical values for only one axis, but this type of multiple-axis control cannot handle differences in the hardness and softness of the material or changes in the temperature of the hydraulic oil. However, in this invention, cross control is performed using two axes, vertical feed and horizontal feed.
It is possible to completely pass through the same trajectory as the teaching trajectory regardless of the temperature difference and perform the exact same machining as the teaching.

Conventional feeding devices move at the same speed, so depending on the shape, such as when a mold has a step at right angles, the feeding speed changes and the feeding pattern cannot be kept constant. In the case of the invention device, it can be kept constant by teaching the positioning controller.

After teaching at low speed, the positioning controller is instructed to work at double or triple speed, and the spindle rotates at double or triple speed accordingly, allowing extremely efficient machining.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment of the device of the present invention, FIG. 2 is a front view taken from arrow A in FIG. 1, FIG. 3 is a side view taken from arrow B in FIG. 1, and FIG. The figure is an enlarged vertical side view taken along line C-C in Figure 2, Figure 5 is an enlarged partially cutaway front view showing the drive mechanism of the servo valve, Figure 6 is a hydraulic circuit diagram, Figure 7 is a control system diagram, and Figure 6 is a hydraulic circuit diagram. FIG. 8 is a block diagram showing a teaching system, FIG. 9 is a block diagram showing an output system, and FIG. 10 is a plan view showing an example of a conventional device. 21...Mold, 23...Material, 24
...Roller stand, 26 ... Squeezing roller,
28...Transfer table, 2S, 31...Hydraulic cylinder, 37.54...Servo motor, 38
．． 56,... Pinion gear, 41.59...
... Rack gear, 43.44 ... Pulse encoder, 46.61 ... Servo valve, 70 ...
... Hydraulic unit, 72.73 ... Solenoid valve,
75...Relief valve, 80...Teaching operating device, 83...Positioning controller, S6...Sequencer. Patent applicant Yamamoto Metal Seisakusho Co., Ltd. Agent
Sickle 1) Sentence 2 Figure 3 Figure 2 Figure 4

Claims (1)

[Claims] In a spinning machine that applies drawing to the material held on the outside of the mold using a squeezing roller operated by a hydraulic cylinder for vertical feed and a hydraulic cylinder for horizontal feed, the spinning machine moves in the vertical feed direction together with the squeezing roller. Vertical feed is provided with a roller stand and a cross feed stand that moves the roller stand in the cross feed direction, and is engaged with a pinion gear driven by a servo motor fixed to each hydraulic cylinder to move in the longitudinal and cross feed directions. A rack gear for horizontal feeding and a rack gear for horizontal feeding are provided respectively, and the roller table and the horizontal feeding table detect slight deviations between the roller table and the rack gear for vertical feeding, and slight deviations between the horizontal feeding table and the rack gear for horizontal feeding, and detect this deviation. A vertical feed servo valve and a horizontal feed servo valve are respectively provided to operate each hydraulic cylinder in the direction of decreasing the rotation angle, and each servo motor is provided with a pulse encoder that inputs the respective rotation angle as a pulse signal to the positioning controller. In addition, a teaching device is provided that manually inputs a drive signal to each servo motor and drives the servo motor to move the squeezing rollers in a fixed order and memorize the work procedure in the positioning controller and sequencer. The roller table and cross feed table are driven using the memorized position information and the work procedure stored in the sequencer, and in the finishing process, the vertical feed cylinder is operated using hydraulic pressure limited to a constant pressure by the relief valve to perform finishing processing. A spinning processing machine characterized by the following features: