JPH0137213B2 - - Google Patents

Description

Detailed Description of the Invention a. Purpose of the Invention (Industrial Application Field) A method of operating a notching press device according to the present invention is to provide a method for operating a notching press device according to the present invention. It is used when punching and forming notches of different shapes.

(Prior Art) When configuring the armature of an electric motor, for example, as shown in FIG. .
A conductive wire is wound between the notches 1 and 1.

As mentioned above, the magnetic pole steel plate 3 used to construct the armature has a notch shown in FIG. It is manufactured by forming notches 1 and 2 using a notching press machine. First, let's talk about the structure and operation of this notching press machine.
The explanation will be given by adding FIG. 8, which schematically shows the internal structure, to FIG. 7, which shows the external appearance.

A first rotating shaft 9 is connected via an air clutch 8 to a flywheel 7 which is rotationally driven by a driving AC motor 5 via a V-belt 6. The rotation and stop of the first rotating shaft 9 can be freely controlled while the AC motor 5 continues to rotate by the action of the air brake 10 provided in the first rotary shaft 9.

An eccentric cam 11 is fixed to the end of the first rotating shaft 9, and a ram 13 is fixed to the lower end of a rod 12 whose upper end is pivotally supported on the outer surface of the eccentric cam 11. An upper mold 14 is fixed to the lower surface of this ram 13, and between this upper mold 14 and a lower mold 16 fixed to the upper surface of a table 15, the outer periphery of a steel plate 18 whose center is supported by a rotary table 17 is formed. sandwich the part,
Cutout 1 (or 2) is punched and formed. The rotary table 17 is rotated intermittently by a predetermined angle in synchronization with the raising and lowering of the ram 13 by an intermittent drive mechanism as described below. Make sure that the intervals between 1 (or 2, 2) are equal.

The intermittent drive mechanism of the rotary table 17 is configured as follows. That is, the second bevel gear 20 meshes with the first bevel gear 19 fixed in the middle of the first rotating shaft 9.
A third bevel gear 22 is fixed to the other end of a second rotating shaft 21 which is fixed to one end. This third bevel gear 22 has a third rotating shaft 24 having a clutch 23 in the middle.
A fourth bevel gear 25 fixed to the upper end of the gear meshes with the fourth bevel gear 25. Clutch 24 in the middle of the third rotating shaft 24
is connected only when returning the ram 13 to the top dead center when the ram 13 does not stop at the predetermined top dead center position and overruns after the press operation is completed, and the rotational force of the correction motor 26 is transferred to the gear 27, 28 to the third rotating shaft 24, and is disconnected during press work to prevent the rotational force of the third rotating shaft 24 from being transmitted to the correction motor 26.

The lower end of the third rotating shaft 24 is connected to the upper end of the fourth rotating shaft 30 via a connecting rod 29 having a universal joint at both ends, and a fifth bevel gear 31 is fixed to the lower end of the fourth rotating shaft 30. meshes with a sixth bevel gear 33 fixed to one end of the fifth rotating shaft 32, and the other end of the fifth rotating shaft 32 is connected to the input shaft of the intermittent rotator 52. In this intermittent rotator 52, when the input shaft is continuously rotated, the output shaft rotates intermittently by a predetermined angle at each constant rotation angle of the input shaft, and the intermittent rotator 52 has a roller gear cam 34 and a roller gear as shown in FIG. 35 in combination. The outer circumferential surface of the roller gear cam 34, which has a hole 38 into which the input shaft is inserted, has tapered ribs 36, 36 that continuously have an inclined part inclined with respect to the circumferential direction and a parallel part parallel with the circumferential direction. We have established
The sides of the tapered ribs 36, 36 and the roller gear 3
Cam follower 3 rotatably supported on the outer peripheral surface of 5.
7 and 37 are brought into contact with each other. When the roller gear cam 34 rotates as the input shaft rotates, the roller gear 35 also rotates as the roller gear cam 34 rotates while the cam followers 37, 37 of the roller gear 35 are in contact with the inclined portions of the tapered ribs 36, 36. The output shaft inserted into the circular hole 39 of the roller gear 35 rotates. On the other hand, while the cam followers 37, 37 are in contact with the parallel portions of the tapered ribs 36, 36, the roller gear 35 does not rotate even if the roller gear cam 34 rotates. The relationship between the rotational speeds of the roller gear cam 34 and the roller gear 35 can be determined by changing the inclination angle of the inclined portion of the tapered rib 36, and the relationship between the time the roller gear 35 is rotating and the time it is stopped can be determined by
It can be adjusted by changing the ratio of the inclined part and the parallel part.

A first gear 40 is fixed to the output shaft of the intermittent rotator 52 as described above, and a second gear 41 that meshes with the first gear 40 is fixed to the other end of a sixth rotating shaft 42 fixed to one end. The third gear 43 and the fourth gear 45 fixed to the lower end of the table rotating shaft 44 are meshed with each other. Although the angle at which the output shaft rotates during one revolution of the input shaft of the intermittent rotator 52 cannot be adjusted later, the first to fourth gears 40, 41,
By appropriately changing the combination of the numbers of teeth 43 and 45, the table 17
The rotation angle can be adjusted.

In addition, in FIG. 7, 46 is a spill press for punching an index to indicate the punching start position of the steel plate, 47 is a clamp for holding down the steel plate placed on the rotary table 17, and 48 is an AC In FIG. 8, 49 indicates the phase of the eccentric cam 11 for raising and lowering the ram 13. Pointer 50 that rotates
It is an angle indicator with a

(Problems to be Solved by the Invention) By the way, using a notching press machine as described above, notches 1 and 2 of different shapes are punched out alternately on the outer peripheral portion of the steel plate 18 as shown in FIG. In this case, various problems have arisen because the conventional method has been as follows.

First of all, if the process of punching out only the notches 1, 1 on one side and the process of punching out the notches 2, 2 on the other side are performed completely separately, the equipment will become larger;
In addition, when using one press machine to first punch out only the notches 1 and 1, and then replace the upper and lower dies 14 and 16 and punch out another notch 2 and 2, the troublesome work of attaching and removing the dies is frequently required. work efficiency is poor.

Furthermore, two notching press machines each equipped with upper and lower molds 14 and 16 are arranged in series, and the steel plate with the notches 1 and 1 formed on the outer periphery of one of the presses is processed by an automatic conveyance device. If the upper and lower dies of either press are to be taken out of the press and sent directly to the other press, the keyway 51 for rotational positioning formed in a part of the circular hole 4 in the center of the steel plate (see Fig. 9) ), or one of the presses as a whole may be offset by half the pitch. However, in any case, correctly shifting the pitch by half is a troublesome and time-consuming task. In addition, if only the mounting position of the mold is shifted, it becomes difficult to reuse the mold if the diameter of the steel plate changes, and the number of types of molds increases accordingly, causing an increase in the manufacturing cost of the magnetic pole steel plate. Furthermore, if the entire press is shifted by a half-pitch, the settings of the press tend to become unstable, and vibrations generated during operation make it impossible for the press itself to perform at its full potential, resulting in poor punching.

The method of operating the notching press device of the present invention is as follows:
This eliminates all of the above-mentioned inconveniences.

b. Structure of the invention (means for solving the problem) The method for operating a notching press device of the present invention is as follows:
As before, the first, which operates in synchronization with each other,
A second notching press machine and a steel plate that has not yet punched a notch on its outer circumference are sent to the first notching press machine, and at the same time, the steel plate that has been processed in the first stage by the first notching press machine is processed. A conveyor is used to send the steel plate to the second notching press machine, and then send the steel plate backward after the second stage processing by the second notching press machine.

The feature of the operating method of the notching press device of the present invention is that the phase of the eccentric cam for raising and lowering the rams of both the first and second notching press machines is shifted, and the notching press machine of the first notching press machine is operated. When the ram of the second notching press is located near the top dead center, the ram of the second notching press is located near the bottom dead center. Alternatively, the phase of a rotary table on which a rectangular steel plate (before punching) is placed and rotates intermittently is shifted by a half-pitch of the notch formed in the steel plate.
Further, only one of the first and second notching press machines can be freely rotated independently from the stopped state immediately after the punching operation is completed when the ram is at the top dead center, and the ram is rotated freely. is slightly lowered to a position above the bottom dead center, and at the same time, the rotary table on which the steel plate to be punched and formed is mounted is rotated by the above-mentioned half pitch, and both the first and second notching press machines are 2 placed on the rotating table
After matching the phase of the keyway formed in the circular hole in the center of the two steel plates, the conveyor is operated and the first notching press machine is rotated to perform the first stage processing of the uncut steel plate. At the same time as the steel plate is fed onto the top surface of the table, the steel plate that has undergone the first stage processing on this rotary table is transferred to the top surface of the rotary table of the second notching press machine that performs the second stage processing. After the steel plate that has been processed in the second stage is sent out backwards, the punching process for the notch is resumed.

(Example) Next, a method of operating a notching press apparatus according to the present invention will be described in more detail with reference to the drawings.

Figures 1 and 2 show the overall structure of a notching press machine operated according to the method of the present invention. FIG. 3 is a schematic diagram showing the internal structure of the first and second notching press machines incorporated in this notching press apparatus.

The notching press device has a first notching press machine 53 and a second notching press machine 54 arranged in series, and the first notching press machine 53 forms two types of notches 1 and 2 (Fig. 9). The steel plate with one of the notches 1 (or 2) formed by punching is transferred to the first notching press machine 53 by a conveyor 55.
Transferred from to the second notching press machine 54,
This second notching press machine 54 punches out another notch 2 (or 1) between the notches 1 (or 2) formed by the first notching press 53. ing.

First and second notching press machines 53, 54
The structure is almost the same as that of the conventional notching press machine shown in Figs. A variable speed servo motor 56 is used, and a stepped belt 59 is hung between a stepped pulley 57 fixed to the output shaft of the variable speed servo motor 56 and a stepped pulley 58 fixed to the end of the first rotating shaft 9. I'm passing it on. The encoder signal is input to a controller (not shown) built in a microcomputer so that the vertical position of the ram 13 and the rotation angle of the rotary table 17 can be determined from the rotation speed of the variable speed servo motor 56.
The structure of each notching press 53, 54 is otherwise similar to the conventional notching press described above, and therefore the same parts are given the same reference numerals and redundant explanation will be omitted. However, in one of the first and second notching presses 53 and 54, the notching press machine rotates the rotary table by half a pitch while lowering the ram 13 after the punching operation is completed. The ram is equipped with a skip mechanism. Although not shown, this skip mechanism is a mechanism that uses a wedge action to raise and lower the upper mold 14 attached to the lower surface of the ram 13. During press work, the upper mold 14 attached to the lower surface of the ram 13 is lowered. When the notching press machine is stopped and the conveyor 55 receives the steel plate, the upper mold 14 is raised to open the gap between the upper and lower punching molds.

First and second notching press machines 53, 54
The structures of the notching presses 53 and 54 are the same except for the skip mechanism described above, but in the adjustment work before starting the punching work, the phases of the rotary tables 17 of both notching presses 53 and 54 are adjusted to the outer peripheral part of the steel plate. Leave half the pitch of the notch to be punched out. The work of shifting the phase of the rotary table 17 in this way involves moving the rotary table 17 to the table rotation axis 4.
4, the rotary table 17 is rotated with respect to the table rotation axis, and then the screws are tightened again to immovably connect the rotary table 17 and the table rotation axis 44. Let's do it.

Therefore, the position of the ram 13 in both the first and second notching presses 53 and 54, which are operated in synchronization with each other, and the pilot 60 at the center of the upper surface of the rotary table 17 (the circular hole 4 at the center of the steel plate) The relationship with the key 61 (which engages with the keyway 51 of the circular hole 4) formed on the positioning protrusion inserted into the positioning projection (FIG. 9) is as follows. That is, both notching press machines 5
When the rams 13 and 13 of No. 3 and 54 are both at the top dead center (the same applies to the bottom dead center) as shown in FIGS. 4A and 4B, the center of the upper surface of the rotary table of the first notching press machine At the moment when the key 61 of the pilot 60 is at the reference line a position as shown in FIG.
As shown in Figure B, the position is shifted by an angle θ with respect to the reference line b which is parallel to the reference line a. This angle θ corresponds to the half-pitch of the notch formed on the outer periphery of the steel plate,
For the sake of brevity, the figures are shown larger than they actually are. On the other hand, if the keys 61 of the pilots 60 in both the first and second press machines are at the reference line a and b positions as shown in FIGS. 5A and B, the first notching press If the ram 13 of the notching press is at the top dead center position as shown in Figure A, the ram 13 of the second notching press will be lowered by a height H below the top dead center as shown in Figure B. It exists in the position.

As shown in FIGS. 5A and 5B, the height at which the ram 13 of one press must be lowered from the top dead center in order to align the positions of the keys 61 of both the first and second notching presses is The minimum amount of height H varies depending on the structure of the intermittent rotator 52, but if the allocation angle of the intermittent rotator 52 is 180 degrees, that is, the minimum amount of When the fifth rotating shaft 32 rotating at the same speed is configured so that the rotation of the fifth rotating shaft 32 is transmitted to the rotary table 17 for only half of one rotation,
The above height H is at least half of the stroke (distance from top dead center to bottom dead center) L of the ram 13 (L≧H≧
L/2). The method for determining the height H will be explained in more detail with reference to FIG. 6.

FIG. 6 shows a cross section of the fifth rotary shaft 32 coupled to the input shaft of the intermittent rotator 52. The fact that the allocation angle of the intermittent rotator 52 is 180 degrees means that if the virtual point P on the circumference of the rotary shaft 32 exists in the U area of FIG. The information is transmitted to the rotary table 17, and while the point P rotates 180 degrees from one end of the U area to the other, the rotary table 17 rotates by one pitch (2θ minutes), but the point P is in the D area of FIG. If it exists, it means that the rotary table 17 does not rotate regardless of the rotation of the fifth rotation shaft 32. On the other hand, the rotation table 17 is rotated while the ram 13 is before and after the top dead center, and when the ram 13 is before and after the bottom dead center to punch out the steel plate placed on the rotary table. The rotary table 17 is prevented from rotating during this period. Therefore, at the moment when the above point P coincides with the point X in the middle of the area U where the table rotates, the ram 13 is at the top dead center, and the point P coincides with the point Y in the middle of the area D where the table is stopped. Each part is adjusted so that the ram 13 is at the bottom dead center at the moment of coincidence. Therefore, the rams 13 of both the first and second notching presses 53, 54 stop at the top dead center as shown in FIG. ), if the phases of the keys 61 of both presses are shifted by an angle θ, in order to eliminate this shift, the ram 13 of one of the presses should be lowered and the rotary table 17 of this press should be lowered. It is sufficient to rotate by the above-mentioned angle θ, but for this purpose, it is necessary to move the point P located at the midpoint X of the rotation area U to the stop area D. As is clear from FIG. 6, the angle required for this movement is 90 degrees or more when the intermittent rotator 33 has an assigned angle of 180 degrees. As is clear from the above explanation, this angle differs depending on the allocation angle of the intermittent rotator 52, but in any case, the rotation of the table 17 is controlled by the ram 1.
3, more than half of the allocation angle is required.

Next, the configuration of the conveyor 55 that transfers the steel plate will be explained with reference to FIGS. 1 and 2, but the structure and operation of the conveyor 55 itself are exactly the same as in the conventional case, so the explanation will be kept brief. .

This conveyor 55 includes a rotary table 63 that feeds a ring-shaped steel plate in which neither the cutouts 1 nor 2 are formed below the first suction tool 62, and a rotary table 63 that sucks and lifts the steel plate on the rotary table 63. It consists of a lifter 64 for transferring to the first suction tool 62, and second and third suction tools 65 and 66 that move in the left-right direction in FIG. 1 in synchronization with the first suction tool 62.
Lifter 64 and first to third suction tools 62, 65,
Each of the suction plates 66 is provided with a plurality of suction plates for suctioning the steel plate, and the first to third suction devices 6
2, 65, and 66 are attached to the same horizontal bar 67 at equal intervals and configured to move horizontally at the same time.

A notching press apparatus consisting of first and second notching presses 53, 54 and a conveyor 55 constructed as described below is operated according to the method of the present invention to produce magnetic poles as shown in FIG. The procedure for manufacturing a steel plate will be explained.

First, for the ring state in which neither of the notches 1 and 2 are formed on the outer periphery, a large number of rectangular steel plates are placed on the rotary table 63 with the keyway 51 set in the direction, and then this rotary table 63 is turned in half. The steel plate is rotated to enter the lower side of the lifter 64, and this lifter 6
4 and adsorbed to the first suction tool 62.
Once the steel plate is suctioned by the first suction tool 62, the horizontal bar 67 is moved to the right in FIG. The notching press machine 53 is operated after the horizontal bar 67 is moved to the left to return each suction tool to the state shown in FIG. form. Once the notch 1 has been formed around the entire circumference of the steel plate, both the first and second notching press machines are stopped with the ram 13 at the top dead center, and the first notching press machine 53
The steel plate on which notch 1 has been formed is transferred to the second notching press machine that forms the remaining notches 2, and no new notches are formed in the first notching press machine. In order to feed the steel plate, the first to third suction devices 62, 65, and 66 provided on the horizontal bar 67 of the conveyor 55 are reciprocated, but prior to this, one of the notching presses (for example, the second) is The ram 13 of 54 is lowered by a little more than half of its stroke, the fifth rotary shaft 32 is rotated by a little more than 90 degrees, and the keys 61, 61 of the rotary tables 17, 17 of both the first and second notching presses 53, 54 are pressed. By matching the phases, the steel plate 2 taken out from the rotary table 17 of the first notching press 53 by the second suction tool 65 can be directly mounted on the rotary table 17 of the second notching press 54. . This work is carried out by energizing the driving variable speed servo motor 56 of one of the notching presses 54 for a short period of time.

The ram 13 of one notching press 54 is
By lowering the stroke by just over 1/2
Although the phases of the keys 61 of the two notching presses match, the gap between the upper and lower molds of the one notching press 54 becomes narrower, so the skip mechanism provided on the ram 13 of this notching press 54 is activated. Then, the upper die attached to the lower surface of the ram 13 is raised, and the interval between the upper and lower dies is widened to facilitate loading and unloading of the steel plate.

In this way, the first notching press machine 53
After transferring the semi-finished steel plate from the rotary table 17 of the second notching press machine 54 to the rotary table 17 of the second notching press machine 54, the operation of the skip mechanism is released and then both the notching press machines 53 and 54 are synchronized. At the same time, the first notching press 53 forms notches 1, 1 in a new steel plate, and at the same time, the second notching press 54 creates another notch between the notches 1, 1. Form 2,2.

After that, both presses are stopped again and the phases of the keys 61 are matched, and then a new steel plate is fed to the first notching press, and the notching press is transferred from the first notching press to the second notching press. At the same time as the semi-processed steel plate is transferred to the machine, the processed steel plate is taken out from the second notching press 54 by the third suction tool 66.

c. Effects of the Invention Since the operating method of the notching press device of the present invention is configured and implemented as described above, it is possible to produce a magnetic pole steel sheet as shown in FIG. The mold can be easily formed, and the mold can also be used when producing magnetic pole steel plates with different outer diameters.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of a notching press machine operated by the method of the present invention, FIG. 2 is a side view seen from the right side of FIG. 1, and FIG. A schematic diagram showing the structure of a notching press machine, Figures 4A and 4B are diagrams showing the phase shift of the key when both the rams of the first and second notching press machines are at the top dead center, Figures 5A and B are diagrams showing the deviation of the ram when the key phases are matched, Figure 6 is a sectional view of the fifth rotating shaft showing the rotation transmission range of the intermittent rotator, and Figure 7 8 is a front view showing an example of the external appearance of a conventionally known notching press, FIG. 8 is a diagram schematically showing the structure of this notching press, and FIG. 9 is a notching press manufactured by the method of the present invention. FIG. 10 is a plan view of a magnetic pole steel plate manufactured by operating the apparatus, and a perspective view showing the internal mechanism of the intermittent rotator. 1, 2: Notch, 3: Magnetic pole steel plate, 4: Circular hole,
5: AC motor, 6: V belt, 7: Flywheel, 8: Air clutch, 9: First rotating shaft, 1
0: Air brake, 11: Eccentric cam, 12: Rod, 13: Ram, 14: Upper mold, 15: Table,
16: Lower mold, 17: Rotary table, 18: Steel plate,
19: first bevel gear, 20: second bevel gear, 21: second rotating shaft, 22: third bevel gear, 23: clutch,
24: Third rotating shaft, 25: Fourth bevel gear, 26: Correction motor, 27, 28: Gear, 29: Connection rod,
30: Fourth rotating shaft, 31: Fifth bevel gear, 32: Fifth rotating shaft, 33: Sixth bevel gear, 34: Roller gear cam, 35: Roller gear, 36: Taper rib, 3
7: Cam follower, 38, 39: Hole, 40: First gear, 41: Second gear, 42: Sixth rotating shaft, 4
3: Third gear, 44: Table rotation axis, 45: Fourth gear, 46: Spill press, 47: Clamp,
48: Reducer, 49: Angle indicator, 50: Pointer,
51: Keyway, 52: Intermittent rotator, 53: First notching press, 54: Second notching press, 55: Conveyor, 56: Variable speed servo motor, 57, 58: Stepped pulley , 59: stepped belt, 60: pilot, 61: key, 62: first suction tool, 63: rotary table, 64: lifter,
65: Second suction tool, 66: Third suction tool, 6
7: Horizontal bar.

Claims (1)

[Claims] 1 The first and second notching press machines are operated in synchronization with each other, and the steel plate whose outer peripheral portion has not yet been punched is fed into the first notching press machine, and at the same time, the first notching press machine The notching machine is comprised of a conveyor machine that sends the steel plate that has undergone the first stage processing by the second notching press machine to a second notching press machine, and then sends the steel plate that has completed the second stage processing by the second notching press machine backwards. A method of operating a press device, in which the rams of the first notching press are raised and lowered by shifting the phase of eccentric cams for raising and lowering the rams of both the first and second notching presses. If it exists near a point,
The ram of the second notching press is located near the bottom dead center, and a circular steel plate attached to the first and second notching presses is mounted and rotated intermittently. The phase of the table is shifted by half the pitch of the notch to be formed in the steel plate, and the ram of only one of the first and second notching presses is at the top dead center. The ram can be rotated independently from the stopped state immediately after the punching operation is completed, and the ram is lowered to a position slightly above the bottom dead center, and at the same time, the rotary table on which the steel plate to be punched and formed is placed is moved to the above-mentioned half pitch. After rotating the keyways formed in the circular holes at the centers of the two steel plates placed on the rotary tables of both the first and second notching press machines, the phases of the keyways are aligned. The uncut steel plate is sent to the top of the rotary table of the first notching press machine, which performs the first stage of processing, and at the same time, the steel plate that has undergone the first stage of processing is processed on this rotary table for the second stage of processing. The notching press is then transferred to the upper surface of the rotary table of the second notching press machine that performs the process, and after the steel plate that has undergone the second stage processing is sent backward on this rotary table, the notching press resumes the notch punching process. How to operate the equipment.