JPS6344178Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention has a skewing function to form the slots of the laminated core obliquely to create a so-called skew, and a turning function to eliminate inconveniences caused by thickness deviations of each core component piece. This invention relates to a progressive mold device for manufacturing laminated cores.

FIG. 1 shows an example of a conventional progressive mold device in a longitudinal cross-sectional view. The strip indicated by reference numeral 1 in the figure is a laminated iron core material for the rotor of a motor, and is supplied between a stripper plate 2 and a die plate 3, and is passed through punches 4 and 5 at a first station into a laminated iron core material for a rotor of a motor. A skew escape round hole 6 and a pilot hole 7 are drilled as shown. At the second station, a shaft hole 10 and a slot 11 are bored by the punches 8 and 9, and at a third station, a cut-and-raised projection hole 12 and a cut-and-raised projection 13 (a third (see Figures 3a and 3b) are provided as an example of the caulking protrusion. Further, in this third station, as shown in FIGS. 4a and 4b, the step of cutting and removing the protrusions 13 using the punch 14 is carried out every time the strip is fed a predetermined number of pitches.
When this step is carried out, a through hole 12a corresponding to the cut-off protrusion is formed. The fourth station is an idle station where no machining is performed, and when the fifth station is reached, the punch 15 and rotary die portion 16 perform outline punching, caulking, and skewing of the core component 17, which will be rotor laminated. As shown in FIG.
The cut and raised protrusions 13 of the subsequent core component are fitted into the cut and raised protrusion holes 12 of the preceding core component and are integrally coupled.

Note that the core component piece 1 drawn into the die 16
6 is a cradle 1 press-fitted into the die part 16;
As shown in FIG. 4B, a predetermined number of core pieces for separation are interposed between them as shown in FIG. 4B, with the cut and raised protrusions removed. When the pedestal 18, which is lowered by the action of the air cylinder 19, comes into contact with the protrusion 20 and tilts, the block of the predetermined number of core components connected to each other, that is, the laminated core, is ejected onto the chute 21.

Next, a mechanism for performing the above-mentioned skew processing will be explained with reference to FIGS. 6 to 8. The die portion 16 of the mold device that performs this skew processing is
It is rotatably supported by the die plate 3 and the die holder 22 via bearings 23 and 24, and a sprocket 25 is attached to its outer periphery. Link chain 26 hung on sprocket 25
are grooves 22a and 22 provided in the die holder 22.
b, and is hung on a sprocket 28 attached to the output shaft of an indexing means 27 installed outside the die holder.

The indexing means 27 includes a roller cam indexing device 29 and a speed reduction device 3 as shown in FIG.
It consists of 0 and has the following effect. That is, the indexing device 29 operates within a range of 180° including the top dead center of one stroke (360°) of the press, and performs indexing of 30°. and reduction gear 30
converts the indexed angle of 30° to an even smaller angle (an angle equivalent to the skew amount).

On the other hand, a pulley 32 is attached to the end 31 of the crankshaft of the press, and the rotation of the crankshaft is caused by the pulley 32, the belt 33, and the pulley 3.
4, 35, a belt 36, a pulley 37, and a universal joint 38.

In a mold apparatus equipped with such a skewing mechanism, the link chain 26 is driven by an amount corresponding to the skew amount, and the die portion 16 is rotated together with the sprocket 25 by an angle corresponding to the skew. The core components 17, which have already been punched into the die part 16 and caulked together, are in close contact with the inner periphery of the die part 16 and are therefore rotated together with the die part 16. Therefore, just before the punch 15 punches the strip 1, the forced rotation for skewing has already been completed, and the newly punched core component and the uppermost piece already punched into the die part 16 are separated. A phase shift occurs between the iron core component piece 17 and the angle corresponding to the skew amount. As a result, the core component newly punched into the die portion 16 is caulked to the already punched core component in a skewed state.

By the way, the thickness of the strip 1 is not uniform due to the deflection of the rolling roller during rolling, and therefore the thickness of the core component piece 17 formed from the strip 1 is also not uniform. Each core component piece 17 is drawn into the die portion 16.
Although they are slightly deviated by the skew angle, they are superimposed in almost the same posture, so the directionality of the thickness deviation of these component pieces 17 is almost the same, and therefore their The laminated core formed by the pieces 17 is inclined as shown in FIG.

In order to prevent this inconvenience, the die section 16 can be rotated by 90 degrees or 180 degrees just before punching out the strip 1 to perform so-called round stacking. No mold apparatus has been proposed that can perform both the rolling operation and the skewing operation.

The object of the present invention is to realize a progressive die device for laminated cores with a simple mechanism that has both the above-mentioned skewing function and rolling stacking function.

Therefore, in the present invention, a roller cam indexing device is connected to the press crankshaft and converts the rotation of the press crankshaft into a rotation corresponding to a predetermined stacking angle and outputs the rotation, and a roller cam indexing device is connected to the press upper mold, and A ratchet device that converts the vertical movement of the press upper mold into rotation corresponding to a predetermined skew angle and outputs the rotation, and a differential gear device are provided, and the output shaft of the roller cam indexing device is connected to the first rotation of the differential gear device.
an input shaft of the ratchet device, and an output shaft of the ratchet device is linked to a second input shaft of the differential gear device;
Furthermore, the output shaft of the differential gear device is connected to the die portion via a power transmission means, and the outputs from the roller cam indexing device and the ratchet device are combined by the differential gear device, and this combined output is used to connect the die portion to the die portion. The above objective is achieved by rotating the .

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. In the following, the same elements as those shown in FIGS. 1 to 9 are denoted by the same reference numerals, and detailed explanation thereof will be omitted.

As shown in FIG. 10, the mold device according to this embodiment includes a gear unit 40 incorporating a differential gear device to be described later, a ratchet device 60 and a roller cam index device 29' that provide rotational power to this gear unit. In preparation, this gear unit 40
A die portion (not shown) is forcibly rotated by the rotational output of the die.

The gear unit 40 has a differential gear device 4 mounted on a housing 42, as shown in FIG. 11 as a vertical section, and as shown in FIG.
A worm wheel 45 is integrally fitted and fixed to the outer periphery of the differential box 44. Thus, the worm wheel 45 is screwed into the worm 46, and the first input shaft 47 of the differential gear device 43 equipped with the worm 46 is connected to the output shaft 63 of the ratchet device 60 via gears 48, 49. It is linked.

On the other hand, a pulley 51 is attached to the second input shaft 50 of the differential gear device 43 along the rotation center of the worm wheel 45, and as shown in FIG. A belt 54 is wound between pulleys 53 attached to the belt 54, thereby linking the differential gear device 43 and the index device 29'.

The output shaft 55 of the differential gear device 43 is connected to a rotating shaft 58 via bevel gears 56 and 57 having the same number of teeth.
A sprocket 28 is fixedly connected to the rotating shaft 58. On the other hand, the die portion of the mold device is rotatably supported by a die plate and a die holder via bearings, and a sprocket is attached to its outer periphery (see FIGS. 6 and 7). This sprocket and the sprocket 28 have grooves 2 provided in the die holder 22.
A link chain 26 passing through 2a and 22b is wound around the sprocket, and a power transmission means is constituted by the pair of sprockets and the link chain. That is, the differential gear device 43 and the die portion are linked by the power transmission means.

In the differential gear device 43, when the second input shaft 50 rotates once with the differential box 44 fixed, the output shaft 55 rotates once in the opposite direction to the input shaft 50, as is well known. Rotate. On the other hand, when the differential box 43 is rotated once by the first input shaft 47 with the second input shaft 50 fixed, the output shaft 55 rotates two times in the same direction as the box 43.
Rotate. That is, the differential gear device 43 can combine the rotations of the first input shaft 47 and the second input shaft 50 and output the combined result from the output shaft 55.

The roller cam indexing device 29' is used to determine the stacking angle during one stroke of the press, and is similar to the indexing device 29 shown in FIG.
Similarly to 9, the rotational power of the crankshaft is input. That is, as shown in FIG. 10, a pulley 32 is attached to an end 31 of the crankshaft, and rotation of the crankshaft is performed by the pulley 32, belt 33, pulleys 34, 35, belt 36, pulley 37, and universal joint 38. The input shaft 2 of the roller cam indexing device 29' is
9a' on a one-to-one basis. As a result, the roller cam indexing device 29' rotates the second input shaft 50 of the differential gear device 43 by an amount corresponding to the indexing angle during one stroke of the press, so that the die portion rotates at one stroke of the press. It will be rotated by a turning angle (for example, 180 degrees) for each stroke.

On the other hand, the input shaft 47 is rotated by a predetermined amount for each press stroke by the ratchet device 60, and the first
The die portion 16 shown in the figures and FIG.
By rotating the laminated core by an angle of 0.1 to 0.2 degrees, the indexing device 29' can rotate the core and skew the laminated core.

Now, the ratchet device 60 will be explained in detail with reference to the perspective views of the ratchet device 60 shown in FIGS. 12 and 13.

This ratchet device 60 converts the vertical movement of the upper mold of the press into intermittent rotational movement, and in particular, rotational movement occurs when the upper mold moves upward.

This ratchet device 60 consists of a pawl 62 provided on a lever 61 and a pawl wheel 64 fixed to an output shaft 63.
, a locking pawl 65 for locking the ratchet wheel, a movement amount regulating block 66, etc., and both pawls 62, 65
is always engaged with the ratchet wheel 64 by springs 67 and 68. The lever 61 is provided with a stopper 61a of the claw 62 and a roller 61b with which the operating piece 70 comes into contact. Further, the operating piece 70 is an upper moving member including the upper mold, for example, a member protruding downward from the slide 39.

The operation of this ratchet device 60 will be explained below. When the upper mold descends and the operating piece 70 descends accordingly, the operating piece 70 pushes down the roller 61b and rotates the lever 61 in the direction of arrow A. Lever 6
1 rotates in the direction of arrow A, the claw 6
2 also moves, but at this time the pawl 64 is locked by the pawl 65, so the pawl 62 moves freely on the pawl 64. Therefore, when the upper mold is lowered, its motion is not transmitted to the output shaft 63.

Next, when the upper mold is raised, the operating piece 70 is also raised together with the upper mold. As a result, the lever 61
is released, the lever 61 is rotated in the direction of arrow B by the biasing force of the spring 67.
The claw 62 also moves accordingly. At that time, the ratchet wheel 6
4 is held engaged with the claw 62 and rotates together with the claw 62 in the direction of the arrow. The rotation of the ratchet wheel 64 is stopped when the pawl 62 comes into contact with the block 66. Note that when the ratchet wheel 64 rotates in the direction of the arrow, the pawl 65 is disengaged from the ratchet wheel 64.

In this way, when the ratchet wheel 64 rotates in the direction of the arrow, the output shaft 63 rotates the first input shaft 47 in the differential gear device 43 by a predetermined amount via the gears 49 and 48 (FIG. 12). The differential gear device 43
Then, the die portion 16 is rotated by an amount equivalent to the skew via the power transmission means.

Although the ratchet device 60 cannot determine a large rotation angle, the device can be made smaller.
On the other hand, although the roller cam indexing device 29' increases the size of the device, it can determine a rotation angle large enough for round stacking. According to 29', the rotation to provide the skew is optimally performed by the ratchet device 60.

As described in detail above, according to the mold device according to the present invention, the output of the roller cam indexing device and the output of the ratchet device are combined by the differential gear device, and the die portion is transferred through the power transmission means. Since it rotates, it has become possible to have both a skewing function and a rotating stacking function with a simple structure. Further, since the rotation for the above-mentioned round stacking and skewing is mechanically obtained from the press in synchronization with the press operation, it is expected that the press stroke will be faster and the cost of the apparatus will be lower.

[Brief explanation of the drawing]

Figures 1 to 8 show a conventional progressive mold device for manufacturing laminated cores. Figure 1 is a vertical cross-sectional view of the entire machine, and Figure 2 is a cross-sectional view of the laminated core material for a motor rotor. A plan view, FIGS. 3A and 3B are a plan view and a vertical sectional view showing the cut and raised protrusion portion, FIGS. 4A and 4B are a plan view and a longitudinal sectional view showing the cut and raised projection hole, and FIGS.
The figure is a longitudinal sectional view showing the state in which outline cutting, caulking, and skewing are being performed by the pressure of a punch, Figure 6 is a plan view showing the rotary die portion and indexing means, and Figure 7 is a view of the rotary die. FIG. 8 is a perspective view showing the power transmission mechanism; FIG. 9 is a view showing the inclination of the laminated core when core components with thickness deviations are stacked; FIG. 10 11 is a perspective view showing an embodiment of the mold device according to the present invention, FIG. 11 is a vertical cross-sectional view showing the configuration of the differential gear device, and FIG.
13 is a sectional view taken along line A and a perspective view of the ratchet device. 1... Strip, 3... Die plate, 6...
...Escape round hole for skew, 12...Cut and raised protrusion hole,
13... cut and raised projection, 15... punch, 16...
Die part, 17... Core component piece, 29, 29'...
...Roller cam index device, 40...Gear unit, 43...Differential gear device, 44...Differential box, 47...First input shaft, 50...Second input shaft, 55...Output shaft , 60...Ratchet device, 61...Lever, 62, 65...Claw, 64...
...Rawl wheel, 66...Movement regulating block, 67,6
8...Spring, 70...Operation piece.

Claims (1)

[Claims for Utility Model Registration] A die part in the outer periphery punching station of the core component of a multi-stage progressive die is rotatably provided, and the die part is used to rotate the core component at a predetermined stacking angle and skew equivalent angle for each press stroke. a roller cam indexing device that is connected to a press crankshaft and converts the rotation of the press crankshaft into a rotation corresponding to a predetermined stacking angle and outputs the rotation; The roller cam indexing device is connected to a ratchet device that converts the vertical movement of the press upper die into a rotation corresponding to a predetermined skew angle and outputs the rotation, and the output shaft of the roller cam indexing device is connected to the first gear in the differential gear device. The output shaft of the ratchet device is linked to an input shaft, and the output shaft of the ratchet device is linked to a second input shaft of the differential gear device, and the output shaft of the differential gear device and the die portion are linked by a power transmission means. The outputs of the roller cam index device and the ratchet device are combined by the differential gear device, and the combined output of the differential gear device rotates the die portion via the power transmission means. A progressive mold device for manufacturing laminated iron cores.