JPH0289600A - Device for operating pressing machine at slow speed - Google Patents

Abstract

PURPOSE:To execute change of vertical movement of a slide for a short time by connecting a motor for regular revolution and a motor for reverse revolution used at slow speed with a connecting clutch in parallel through a clutch for regular revolution and a clutch for reverse revolution. CONSTITUTION:At the time of pres-working, the revolution of the main motor 1 is transmitted to a driving shaft 5, and the slide 12 is vertically executed. At the time of operating the motor at slow speed, the clutch 4 is set at off and the connecting clutch 15 is set at on and slow speed revolution device 16 is connected with a slide driving mechanism 14. In the slow speed driving device 16, the motor 32 for regular revolution and the motor 33 for reverse revolution are connected with the connecting clutch 15 through the clutch 28 for regular revolution and the clutch 29 for reverse revolution. At the time of changing over regular and reverse revolutions, brake 13 is set at on and slide mechanism 14 is quickly stopped and as any clutch of regular or reverse is set at on, the change is executed in a short time and workability of die clamping can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a device for slowly operating a press machine (micro-inching) for mold matching work when replacing molds, for example.

[Conventional technology]

A press machine is equipped with a slide drive mechanism consisting of a crankshaft, etc., and press work is performed by driving this slide drive mechanism with a main motor to move the slide up and down. A slow-speed operation device is provided to move the slide up and down at low speed for the actual mold matching work. The conventional slow speed operation device is
As shown in Japanese Utility Model Publication No. 55-7360, Japanese Patent Publication No. 55-8280, Japanese Utility Model Publication No. 55-9520, and Japanese Patent Publication No. 59-28438, the drive member of the slide drive mechanism is driven by one micro-inching motor; [Problems to be Solved by the Invention] During the pattern matching work, the vertical movement of the slide is frequently switched. For example, after the slide reaches the bottom dead center, the slide starts rising, and then the slide is lowered again. In conventional slow-speed operation devices, the vertical movement of the slide is switched by reversing the rotation direction of the micro-inching motor, and this reversal can only be done after the rotation of the motor's output shaft has completely stopped. It was not possible to switch the vertical movement of the slide in a short time.

In recent years, there has been a growing demand for improved production efficiency, and as a result, it has become necessary to be able to quickly complete mold matching work when replacing molds. A driving device is required.

An object of the present invention is to provide a slow-speed operation device for a press machine that can change the vertical movement of a slide in a short time and improve workability during mold matching work.

[Means to solve the problem]

The slow-speed operation device for a press machine according to the present invention is a slow-speed operation device for a press machine that is connected via a coupling clutch to a slide drive mechanism that moves a slide up and down by the driving force of a main motor, and is and a reverse rotation motor, and these motors are connected in parallel to the coupling clutch via a forward rotation clutch and a reverse rotation clutch.

In the above configuration, a flywheel is provided between the forward rotation motor and the forward rotation clutch and between the reverse rotation motor and the reverse rotation clutch.

Further, the coupling clutch includes a clutch body fixedly installed on the input shaft side connected to the forward/reverse rotation motor, a friction member fixedly installed on the output shaft side connected to the slide, and the clutch body and the friction member. and a plate-shaped piston axially movably connected to the clutch body, the input shaft being axially movable, and a gear fixed to the input shaft being in mesh with the input shaft. It slides against the gear that moves.

Further, the plate-shaped piston is connected to the clutch body by a connecting pin so as to be movable in the axial direction, and the connecting pin is arranged on the inner peripheral side of the outer peripheral end of the friction surface of the friction member.

Furthermore, the plate-shaped piston is always urged toward the input shaft by a spring provided on the clutch body, and this spring is disposed on the inner circumferential side of the outer circumferential end of the friction surface of the friction member.

Further, the slow speed operation device for the press machine includes a stopper member that restricts movement of the clutch body, which is axially movable together with the input shaft, toward the output shaft.

[Effect]

As mentioned above, if the slow speed operation device of the press machine has a forward rotation motor and a reverse rotation motor, and these motors are connected in parallel to the connecting clutch via the forward rotation clutch and the reverse rotation clutch, the connecting flange With the switch turned on, the driving force of the forward and reverse motors can be alternately transmitted to the slide drive mechanism by switching the forward and reverse flange on and off, thereby making it possible to switch the vertical movement of the slide in a short time.

In addition, if a flywheel is provided between the forward rotation motor and the forward rotation clutch, and between the reverse rotation motor and the reverse rotation clutch, the driving force of the forward and reverse rotation motors will slide due to the rotational inertia of the flywheel. A sufficiently large amount of kinetic energy is transmitted, and so-called trial driving operations can be performed even with small-capacity motors.

Further, by making the input shaft of the coupling clutch freely movable in the axial direction, and by making the gear fixed to the input shaft slide against the gear with which this gear meshes, fluid pressure is applied to the plate-shaped piston. When the input shaft and the output shaft are connected by the friction force acting on the friction member by applying the clutch body, the friction force can be applied to the friction member by moving the clutch body in the axial direction. Compared to the conventional general latch, which is constructed by alternately arranging a plurality of friction plates movable in the axial direction on each supporting member of the input shaft and the output shaft, the structure is simplified by eliminating the plurality of friction plates. It becomes possible to eliminate noise, etc.

Furthermore, as mentioned above, by arranging the connecting pin and the spring on the inner peripheral side of the friction surface of the friction member, the overall connecting clutch can be made smaller and can be effectively incorporated into a limited space. becomes.

In addition, if a stopper member is provided that is movable in the axial direction together with the input shaft and restricts the movement of the latch body toward the output shaft side, this stopper member may cause a connected clutch to be generated when the clutch body moves toward the output shaft side. It is possible to prevent contact between the plate-shaped piston and the friction member when the friction member is turned off, and as a result, the life of the friction member can be maintained for a long time.

〔Example〕

FIG. 1 is a schematic diagram showing a drive system of a press machine to which a device according to an embodiment of the present invention is applied. A drive shaft 5 is connected to the main motor l via a belt 2, a flywheel 3, and a flange 4, and a transmission shaft 8 is connected to the drive shaft 5 via a small diameter gear 6 and a large diameter gear 7. A large diameter gear lO is connected to the transmission shaft 8 via a small diameter gear 9, and a slide 12 is connected to an eccentric portion 10A of this gear 10 via a connecting rod 11. A brake 13 is provided on the drive shaft 5, and this brake 13 brakes the rotation of the drive shaft 5 by the frictional force acting on a friction plate like a normal brake.

When the flange 4 is turned on, the brake 13 is turned off, and the main motor 1 is driven, the slide 12 moves up and down to perform press working, and the driving force of the main motor 1 is transmitted to the flywheel 3 via the belt 2. to the connecting rod 11 constitute a slide drive mechanism 14.

A coupling clutch 15 is provided on the drive shaft 5 constituting the slide drive mechanism 14, and a slow speed operation device 16 according to this embodiment is connected to the slide drive mechanism 14 via the coupling clutch 15. As shown in FIG. 2, the slow speed operation device 16 is unitized.

In the case 17 of the slow speed operation device 16, an input shaft, an intermediate shaft 19, and a transmission shaft 20 of the coupling clutch 15 are arranged in parallel, and these shafts 18, 19, 20 are connected to a large diameter gear 21, an idle gear 22, It is connected by a speed reduction mechanism 24 consisting of a pinion gear 23. Note that the output shaft 25 of the coupling clutch 15
is the drive shaft 5 shown in FIG. At both ends of the transmission shaft 20 protruding from the case 17, a forward rotation flywheel 26,
A reverse rotation flywheel 27 is rotatably provided, and these flywheels 26.27 and the transmission shaft 20 are connected via a forward rotation clutch 28 and a reverse rotation clutch 29 built into the flywheel 26.27. The structure is such that Each flywheel 26.27
The driving forces of a forward rotation motor 32 and a reverse rotation motor 33, which are micro-inching motors, are transmitted to the micro-inching motors through belts 30 and 31.

FIG. 3 shows the specific structure of the coupling clutch 15.

The coupling clutch 15 includes a clutch body 34 fixed to the input shaft 18, a friction member 36 fixed to the output shaft 25 via a flange member 35, and arranged between the clutch body 34 and the friction member 36. The clutch body 34 has a plate-shaped piston 37 with a circular plate member 3.
8 and a lid member 39 attached to the disk member 3 so as to protrude toward the output shaft 25 side, and between the plate-shaped piston 37 and the protrusion 39A that protrudes in the inner circumferential direction of the lid member 39. Linings 40 are provided on both sides of the friction member 36 located in the axial gap.

The plate-shaped piston 37 is connected to the clutch body 34 via a stepped connecting pin 41 so as to be movable in the axial direction.
Rotates together with 4. A passage 43 is formed inside the connecting bottle 41 to allow air in the hole 42 when the tip of the connecting bottle 41 is inserted into the hole 42 of the plate-shaped piston 37 to escape. A bolt 44 passing through the disk member 38 of the clutch body 34 is installed in the plate-shaped piston 37.
The plate-shaped piston 37 is always urged toward the input shaft 18 by a spring 45 wound around the plate-shaped piston 37 . The limit of movement of the plate-shaped piston 37 toward the input shaft 18 is defined by the stepped portion of the connecting bottle 41 .

As shown in FIG. 3, the connecting pin 41 and the spring 45 are arranged on the inner peripheral side of the outer peripheral end of the friction surface of the friction member 36 formed by the lining 40.
The connecting clutch 15 can be made smaller as a whole compared to the case where the connecting clutch 15 is arranged outside of this outer peripheral end.
The connecting clutch 15 can be effectively arranged in a limited space.

As shown in FIG. 2, a rotary type air supply device 46 is connected to the end of the input shaft 18, and air from an air source is supplied to the air supply device 46.
, is supplied to a gap 48 between the clutch body 34 and the plate-shaped piston 37 shown in FIG. 3 through a passage 47 inside the input shaft 18. The input shaft 18 is movable in the axial direction including the clutch body 34. To explain this specifically, as shown in FIG. 2, a rolling bearing 50 rotatably supports the input shaft 18 together with a sliding bearing 49. It is fitted into the bearing housing 51 of the case 17 so as to be slidable in the axial direction,
The input shaft 18 moves in the axial direction by sliding of the input shaft 18 with respect to the slide bearing 49 and sliding of the rolling bearing 50 with respect to the bearing housing 51. When this movement is performed, the large-diameter gear 21 fixed to the input shaft 18 slides in the axial direction with respect to the eye and Lugia 22 fixed to the intermediate shaft 19.

As mentioned above, when air is supplied to the gap 48, the air pressure causes the plate-shaped piston 37 to move to the right in FIG.
The clutch body 34 and the input shaft 18 move to the left in FIG. 3 while compressing the spring 45 due to the reaction force of the air pressure. As a result, the plate-shaped piston 37 and the protrusion 39A of the cover member 39 of the clutch body 34 come into contact with the linings 40 on both sides of the friction member 36, and a frictional force acts on the friction member 36, so that the input shaft 18 and the output shaft 25 is connected, and the coupling clutch 15 is turned on. On the other hand, if the air pressure in the gap 48 is released, the coupling clutch 15 is turned off.

The structure of the connecting clutch 15 is as described above.
By making the input shaft 18 including the input shaft 4 movable in the axial direction, frictional force is applied to the friction member 36. Therefore, like a conventional clutch, the connecting clutch can be attached to the input shaft and the output shaft, respectively. Compared to a structure in which a plurality of thin friction plates are supported movably in the axial direction on a support member provided, and the clutch is turned on by bringing these friction plates arranged alternately in the axial direction into frictional contact, In addition, the structure can be simplified by eliminating multiple friction plates, the noise generated by multiple friction plates can be eliminated, and the support member and friction plate can be moved freely in the axial direction with respect to the support member. This makes it possible to obtain the advantage of eliminating the need to process uneven portions on the board.

In addition, as shown in FIG. 3, the space 5 in which the spring 45 is housed
2 is sealed by a cover 53 provided on the disc member 38 of the clutch body 34, thereby preventing the air supplied to the gap 48 from leaking outside from the space 52 through the gap on the outer periphery of the bolt 44. It has become. Further, holes 54 and 55 are formed in the cover member 39 of the clutch body 34 and the flange member 35, and these holes 54, 5
5 allows air within the gap 56 to escape to the outside when the plate-shaped piston 37 moves to the right in FIG. In addition to this, 7L54 turns on the connecting clutch 15,
It also serves as an escape hole for abrasion powder of the lining 40 that is generated by repeated turning off.

A stopper member 57 is disposed near the coupling clutch 15, and the stopper member 57 is provided with a protrusion 57A that faces the cover member 39 of the clutch body 34 in the axial direction.

Therefore, even if the input shaft 1B including the clutch body 34 is movable in the axial direction as described above, the clutch body 34 may move more than a predetermined amount toward the output shaft 25 due to vibrations during press operation. This can prevent the clutch body 34 from moving toward the output shaft 25 side and the plate-shaped piston 37 coming into contact with the lining 40 when the coupling clutch 15 is turned off, and prevent the friction member 36 provided with the lining 40 from coming into contact with the Can maintain a long lifespan.

Next, the structures of the forward rotation clutch 28 and the reverse rotation clutch 29 shown in FIG. 2 will be explained. These clutches 2
Since the structure of 8.29 is the same, FIG. 4 shows the forward rotation clutch 28.

The forward rotation flywheel 26 is rotatably disposed on the transmission wheel 20 by bearings 5B and 59, and the flywheel 26 includes a support member 61 that supports a friction plate 60 so as to be movable in the axial direction.
is fixed to the transmission shaft 20, and a support member 63 that supports the friction plate 62 so as to be movable in the axial direction is fixed to the transmission shaft 20. These friction plates 6062 are arranged alternately in the axial direction. A plate-shaped piston 65 guided by a piston guide member 64 is provided on the transmission shaft 20 so as to be slidable in the axial direction, and air from an air source passes through a rotary air supply device 66 and a passage 67 in the transmission shaft 20 to the piston. Guide member 64 and plate-shaped piston 65
When the friction plates 60 and 62 come into frictional contact with each other due to the sliding of the plate-shaped piston 65, the forward rotation flywheel 26 and the transmission shaft 20 are connected, and the forward rotation clutch 28 is turned on. When the air pressure in the gap 68 is released, the normal rotation clutch 28 is turned off.

In the above, as shown in Fig. 2, the forward rotation flywheel 26
, a reversing flywheel 27 is provided on the transmission shaft 20, and a bell) 30.3 is attached to these flywheels 26 and 27.
Since the forward rotation motor 32 and the reverse rotation motor 33 are connected through the forward rotation motor 32 and the reverse rotation motor 33, these motors 32 and 33 are connected in parallel to the coupling clutch 15 through the forward and reverse rotation clutches 28 and 29 and the speed reduction mechanism 24. Also, the forward/reverse clutches 28, 29 and the forward/reverse motors 32°33
Forward/reverse flywheels 26, 27 are provided between the two.

The above is the structure of the slow speed operation device according to this embodiment, and next, the press operation including the slow speed operation will be explained.

When performing press work, turn off the coupling clutch 15,
When turning on the clutch 4 shown in FIG. 1 and turning off the brake 13, driving the main motor l to move the slide 12 up and down by the slide drive mechanism 14, and stopping this up and down movement, Turn off clutch 4,
Turn on brake 13.

During pressing work in which the slide 12 is continuously moved up and down, even if vibrations from the press operation act on the slow speed driving device 16, the output shaft of the latch body 34 can move freely in the axial direction together with the input shaft 18 as described above. Since the movement toward the 25 side is blocked by the protrusion 57A of the stopper member 57, the plate-shaped piston 37 can be prevented from coming into contact with the lining 40.

When changing molds to produce different pressed products and performing slow operation in which the slide 12 is moved up and down at low speed for mold matching work, the clutch 4 and brake 13 are both turned off. and turn on the coupling clutch 15. When the slide 12 is to be lowered, both the forward and reverse rotation clutches 28 and 29 are turned off, the forward and reverse rotation motors 32 and 33 are driven, and the forward rotation clutch 28 is turned on. This allows the driving force of the forward rotation motor 32 to be transferred to the forward rotation flywheel 26, the forward rotation clutch 28, and the transmission shaft 2.
0, transmitted to the coupling clutch 15 via the deceleration mechanism 24,
It is further transmitted to the drive shaft 5, which is the output shaft 25 of the coupling clutch 15.

When raising the slide 12, the forward rotation clutch 2
8 is turned off, the rotation of the drive shaft 5 is stopped by the brake 13, and then the reverse clutch 29 is turned on. This allows the driving force of the reversing motor 33 to be transferred to the reversing flywheel 27.
, reverse clutch 29, transmission shaft 20. The signal is transmitted to the coupling clutch 15 via the deceleration mechanism 24 and further transmitted to the drive shaft 5.

As described above, in this embodiment, the forward/reverse motors 32, 33 are connected to the forward/reverse clutches 28, 29 in the connecting clutch 15.
Since these clutches 28 and 29 are connected in parallel, the driving force of the forward and reverse motors 32 and 33 can be switched and transmitted to the drive shaft 5 by turning on and off the clutches 28 and 29. When converting the drive shaft 5 from normal rotation to reverse rotation or from reverse rotation to normal rotation, even if one motor does not stop driving, as long as the rotation of the drive shaft 5 is stopped with the brake 13, the drive shaft 5 can be driven by the other motor. It is possible to start rotating the shaft 5, so that the vertical movement of the slide 12 can be switched in a short time during slow speed operation, and the workability of mold matching work etc. can be greatly improved.

Further, a flywheel 26 for forward/reverse rotation is provided between the motors 32, 33 for forward/reverse rotation and clutches 28, 29 for forward/reverse rotation.
．． 27, the forward/reverse motors 32,
33 has a small capacity and the output of these motors 32 and 33 is small, the rotational inertia of the flywheels 26 and 27 can increase the kinetic energy of the vertical movement of the slide 12 during slow speed operation. A so-called trial punching operation can also be performed during the mold matching operation.

FIG. 5 is a schematic diagram illustrating the structure of the slow speed operation device 16 of the embodiment described above. FIG. 6 is a diagram similar to FIG. 5 showing a slow-speed operating device 16' according to another embodiment;
The same reference numerals are given to members having the same functions as in the previous embodiment.

In the embodiment shown in FIG. 6, the forward/reverse flywheel 26.2
7 are individually arranged on two transmission shafts 20' provided in the case 17 of the slow speed operation device 16, and each transmission shaft 20'
is connected to the input shaft 18 of the coupling clutch 15 via a reduction mechanism 24' consisting of a pinion gear 23' and a large-diameter gear 21.

According to this embodiment, two transmission shafts 20' are required;
Since the forward/reverse flywheels 26 and 27 can be arranged on one side of the case 17, the width of the slow speed operation device 16' can be reduced overall, and the device f6' can be made smaller. .

In the embodiment described above, the large-diameter gear 10 having the eccentric portion 10A into which the upper end of the connecting rod 11 is fitted is used, but the device according to the present invention uses the large-diameter gear 10 having the eccentric portion 10A instead of the large-diameter gear 10 having the eccentric portion 10A. The present invention can also be applied to a press machine using a crankshaft, and the number of connecting rods 11 may be two or more, and the structure of the slide drive mechanism 14 is not limited to that of the above embodiment.

〔Effect of the invention〕

According to the present invention, the micro-inching motor has two motors, one for forward and one for reverse rotation, and these motors are connected in parallel to the connecting clutch via the clutch for forward and reverse rotation, so that the vertical movement of the slide during slow speed operation is prevented. It is now possible to change over in a short time, improving the workability of mold matching work, etc., and ultimately increasing production efficiency.

In addition, since a forward/reverse flywheel is provided between the forward/reverse motor and the forward/reverse clutch, even if the forward/reverse motor is of small capacity, it will slide due to the rotational inertia of the flywheel. The kinetic energy can be increased, and so-called trial hitting work is also possible.

Furthermore, the coupling clutch has a clutch body fixed to the input shaft side connected to the forward/reverse motor, a friction member fixed to the output shaft side connected to the slide, and a friction member between the clutch body and the friction member. The input shaft is movable in the axial direction including the clutch body, and the gear fixed to the input shaft is in mesh with the clutch body. Because it has a structure that can slide against the gear that is moving, there is no need to use a structure that uses multiple friction plates that can move freely in the axial direction for the connecting clutch, unlike conventional general latches. By eliminating the friction plates, it is possible to change the structure to a hour wheel, and to eliminate the noise generated when multiple friction plates move in the axial direction.

Furthermore, the connecting pin that connects the plate-shaped piston to the clutch body in an axially movable manner and the spring that constantly biases the plate-shaped piston toward the input shaft are arranged on the inner circumferential side of the friction surface of the friction member. Therefore, compared to the case where these are arranged outside the outer peripheral edge of the friction surface of the friction member, the connecting clutch can be made smaller overall, and the connecting clutch can be effectively incorporated into a limited space.

In addition, even if the clutch body and input shaft are movable in the axial direction, a stopper member is provided that restricts the clutch body from moving toward the output shaft, so the clutch body may move more than a certain amount toward the output shaft. Movement can be restricted by this stopper member, thereby preventing the plate-shaped piston from coming into contact with the friction member when the connecting tarlatch is turned off, thereby reducing the life of the friction member.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram illustrating the drive system of a press machine to which a device according to an embodiment of the present invention is applied, Fig. 2 is a sectional view showing the structure of a slow-speed operation device, and Fig. 3 is a connection A sectional view showing the structure of the clutch, Figure 4 shows the structure of the forward/reverse clutch,
5 is a schematic diagram illustrating the structure of the slow speed operation device of FIG. 2, and FIG. 6 is a diagram similar to FIG. 5 showing the slow speed operation device according to another embodiment. It is. DESCRIPTION OF SYMBOLS 1...Main motor, 5...Drive shaft, 12...Slide, 14...Slide drive mechanism, 15...Connection clutch, 16.16'...Slow speed operation device, 18...
・Input shaft, 25...Output shaft, 26.27...Flywheel for forward/reverse rotation, 28.29...Clutch for forward/reverse rotation, 32° 33...Motor for forward/reverse rotation, 34.・・・
Clutch body, 36...Friction member, 37...Plate piston, 41...Connection pin, 45...Spring, 57...
...Stopper member. Fig. 1 Fig. 2 Fig. 4-・Output shaft 41-・Connecting pin j Fig. 3 Fig. 4

Claims (6)

[Claims] (1) A slow-speed operation device for a press machine that is connected via a coupling clutch to a slide drive mechanism that moves the slide up and down using the driving force of a main motor, and has a forward rotation motor and a reverse rotation motor, and A slow speed operation device for a press machine, characterized in that a motor is connected in parallel to the coupling clutch via a forward rotation clutch and a reverse rotation clutch. (2) The press machine according to claim 1, further comprising a flywheel provided between the forward rotation motor and the forward rotation clutch and between the reverse rotation motor and the reverse rotation clutch. Slow speed operation device. (3) In claim 1, the coupling clutch includes a clutch body fixed to an input shaft side connected to the forward/reverse rotation motor, a friction member fixed to an output shaft side connected to the slide, and a friction member fixed to the output shaft side connected to the slide. The clutch includes a plate-shaped piston connected to the clutch body so as to be movable in the axial direction between the clutch body and the friction member, and the input shaft is movable in the axial direction and is fixed to the input shaft. A slow-speed operation device for a press machine, characterized in that the gear slides against the gear with which it meshes. (4) In claim 3, the plate-shaped piston is connected to the clutch body by a connecting pin so as to be movable in the axial direction, and the connecting pin is arranged on the inner peripheral side of the outer peripheral end of the friction surface of the friction member. A slow speed operation device for a press machine, characterized by: (5) In claim 3, the plate-shaped piston is always urged toward the input shaft by a spring provided on the clutch body, and the spring is arranged on the inner peripheral side of the outer peripheral end of the friction surface of the friction member. A slow-speed operating device for a press machine, characterized by: (6) The slow-speed operation device for a press machine according to claim 3, further comprising a stopper member that restricts movement of the clutch body, which is axially movable together with the input shaft, toward the output shaft.