JPS597435A - Punch-working device of motor core - Google Patents

Abstract

PURPOSE:To equalize unequality of thickness of a plate and density of a material, by connecting an index connected to a revolving shaft of a press and a revolving member for holding a motor core through a clutch, and revolving said member by a prescribed angle whenever a prescribed number of motor cores are punched, and laminating them. CONSTITUTION:When a motor core 11 is punched by an upper die 22 and a lower die 10, an electromagnetic clutch unit 8 is held ''on'' by a signal transmitted at every number of pieces set from a setting device 20. Subsequently, an index cam unit 3 transfers power from a revolving shaft of a press to a revolving member 12 through the clutch unit 8, an output shaft 7, a timing pulley 9 and a timing belt 14, rotates it, and during this time, conduction to an electromagnet 16 turns ''off''. Subsequently, a revolving angle of the revolving member 12 is detected by a detector 18, and when it reaches a set angle, the clutch unit 8 stops the transfer of power by a signal of a setting device 21, the electromagnet 16 is conducted and the revolving member 12 is damped. Said operation is executed repeatedly until lamination of the motor core is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor core punching apparatus that rotates and stacks a predetermined number of cores by a predetermined angle each time a predetermined number of cores are punched.

Conventionally, the strip material from which motor cores are punched has a slight change in thickness in the width direction or length direction, and when the punched motor cores are oriented in a certain direction or stacked, they tend to tilt in the direction in which they are stacked. The drawback is that dimensional accuracy cannot be obtained and performance deteriorates, and methods have been devised to eliminate this problem. They focus on the fact that the dimensional change in the width direction of the strip material is significant, and when stacking the strips, they are reversed 180 degrees.However, the dimensional change is not constant, and the performance of the motor is extremely improved. In recent years, there has been a demand for improving the dimensional accuracy of the motor core by equalizing this irregular dimensional change.

The object of the present invention is to meet this need, and to provide a motor core punching device that can stack a predetermined number of cores by rotating them at a predetermined angle and has improved rotation accuracy. Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, an index cam unit (3) is fixed on the front surface of a bolster (2) on a press bed (1). Index cam unit (
Timing pulley (5) fixed to the input shaft (4) of 3)
and a timing pulley provided on a rotating shaft (not shown) of the press are connected by a timing belt (6) at a rotation ratio of 1:1. Output shaft of index cam unit (3) (
7) has an electromagnetic clutch unit (8) interposed in the middle. When an electric signal is sent to the electromagnetic clutch unit (8), the index cam unit (3) and output shaft (7)
and dynamically connect them. A timing pulley (9) is fixed to the output shaft (7). A rotary member (121) for holding the punched motor core aD is rotatably provided on the lower mold αω, and a timing pulley (13) and a timing boot provided on the outer periphery of the lower mold ◇0) are rotatably provided on the lower mold αω to hold the punched motor core aD. )
It is connected to the timing belt (+4). A punky disk (151) is fixed on the outer periphery of the rotating member (121), and the electromagnet (1G) and brake disc α5 fixed on the lower mold OQ constitute a brake device.There are no rotating members yet. An indexing cam α force is fixedly attached to the lower die 00), and the rotational position of the rotating member (121) can be detected by a detector α8) fixedly attached to the lower die 00) and the indexing cam 07).The indexing cam a7 ) is provided with four parts at intervals of 45 degrees on the outer circumference, as shown in Fig. 4. You can create and replace the number of divisions you want. It is desirable that the detector be a non-contact switch, but it may also be a limit switch.

In Fig. 3, the index cam unit (3) outputs the power input from the input shaft (4) to the output shaft (7) side, and the range α is relative to the crank angle of the rotating shaft of the press.
It is shown in That is, the range from the crank angle of 270 degrees to 90 degrees through the top dead center indicates that output is generated for each rotation of the rotating shaft of the press.

FIG. 4 shows the control circuit of this device. The rotary cam switch agl is connected to the rotating shaft of the press at a rotation ratio of 1:1.

The rotary cam switch α transmits an electric signal every rotation at a constant rotation angle position of the rotary shaft of the press.

In this case, it is necessary to count the number of punched motor cores (Il+), and the signal is sent near the bottom dead center (crank angle 180 degrees). If you set in advance whether or not to rotate, a signal is sent and reset every time the set number of receptions is counted.The setting device (2o) sends a signal by rotating the electromagnetic clutch unit (8) from 270 degrees at the crank angle of the press. 90
It is kept in operation until it receives an electrical signal from another device. This transmission still acts as a signal to "cut off" the energization of the rotating member (electromagnet α6 braking one motor).

A setting device (21) that receives an electric signal from a detector Oal that detects the rotation angle of the rotation member a21 determines how many recesses of the index cam a force the rotation angle at which the rotation member (+21) should be rotated corresponds to. The number of times should be set in advance, taking this into consideration.

The setting device (21J) transmits a signal every time it receives a set number of times, and uses the signal to stop the output of the electromagnetic clutch unit I-(8), and at the same time turns the electromagnet aω into 1st contact to stop the rotation of the rotating member (121). Brake.

Next, we will discuss the effect. In FIGS. 2, 3, and 4, the setting device () determines how many times the rotating member a2 is to be rotated each time how many pre-punched motor cores aυ are laminated and held by the rotating member (+2). 20) and (2I)
Set to . Operate the press and press the upper mold (2-dry and lower mold 00)
When the motor core OD is punched out, the electromagnetic clutch unit (8) is held in the "contact" state by a signal sent from the setter (20) every set number of sheets. When the crank angle of the press is between 270 degrees and 90 degrees, the index cam unit (3) transfers the power from the rotating shaft of the press to the clutch unit (8), the output shaft (power), the timing pulley (9), and the timing belt 0 (power). ) to the rotating member (12), and the rotating member (121) rotates.During this time, the electromagnet Q6
1 is turned off and the braking is released.

The rotation angle of the rotating member (121) is detected by the detector α barrel, and when the preset angle is reached, a signal is sent from the setting device (2I), and the clutch unit (8) stops transmitting power with that signal, and at the same time Energization of the electromagnet (16) is started, and the rotating member (I2) is braked.The above steps are repeated until the lamination is completed.These operations are performed extremely smoothly due to the intervention of the electromagnetic clutch unit (8). Therefore, the rotation angle of the rotating member 02 can be maintained with high precision.Therefore, the dimensional accuracy of the laminated product of the motor core 01J is uniformly improved in each part, and in particular, the unevenness of the material density in the parts of the strip material used is improved. When the stacking of the motor core αD is completed, it is taken out to the bottom of the rotating member (121).If the crank angle of the press is between 270 degrees and 90 degrees, the rotation of the rotating member (121) is not completed. , Setting device: Press operation can be stopped by a signal from 2υ.

Further, the angle range from 270 degrees to 90 degrees can be changed within a range that does not interfere with punching.

As is clear from the above description, according to the present invention, a predetermined number of punched motor cores can be rotated with high accuracy at a predetermined angle and stacked, and the widthwise thickness of the strip material used can be reduced. It has great practical effects and advantages, such as being able to equalize not only unevenness but also uneven plate thickness and material density, which ultimately helps improve the performance of the motor.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional side view of the main parts of the press installed in the example, Fig. 2 is a plan view of the tl-I+ section of Fig. 1, and Fig. 3 shows the operating range of the index cam unit with respect to the press crank angle. 4 is a control system diagram of the embodiment. 1 is a bed, 2 is a bolster, 3 is an index cam unit, 4 is an input shaft, 5 is a timing pulley, 6 is a timing belt, 7 is an output shaft, 8 is an electromagnetic clutch unit,
9 is a timing pulley, 10 is a lower mold, 11 is a motor core, 12 is a rotating member, 13 is a timing pulley, 14 is a timing belt, 15 is a brake disc, 16 is an electromagnet, 17 is an index cam, 18 is a detector, 19 is a rotary cam switch, 20 is a setting device, 21 is a setting device, and 22 is an upper mold. Patent applicant AIDA Engineering Co., Ltd. Hitachi Ltd. Representative Patent attorney Toshio Koiwai Figure 2 4 Figure M3 a

Claims (1)

[Claims] In the motor core punching equipment, an index cam unit is installed that is dynamically connected to the rotating shaft of the press.
A motor core punching device characterized in that the output shaft of the index cam unit and a rotating member for holding the motor core are dynamically connected via a clutch unit.