JPS6218268B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a manufacturing device for a laminated core made of silicon steel plates used as the core of, for example, an electric motor, a generator, or a transformer. The present invention relates to a laminated core manufacturing apparatus that is capable of performing combined processing of a pressing process and a welding process in the manufacturing process of a laminated core.

[Conventional technology]

Conventionally, when manufacturing this type of laminated core, first a press machine is used to punch a thin plate such as a silicon steel plate into a predetermined shape using a predetermined mold, and the punched core material is taken out from the mold and stamped into a predetermined shape. After separating the laminated iron core to a thickness of 1, the outer surface of the laminated iron core of a predetermined thickness is continuously welded in the longitudinal direction using a welding machine.

[Problem that the invention seeks to solve]

However, according to the conventional laminated core manufacturing method described above, the core material, which is punched from a thin plate by a press machine and laminated, must be taken out from the inside of the mold each time, and furthermore, it is necessary to take out the laminated core material from the inside of the mold each time. After separating the laminated core materials to a predetermined thickness, the outer surface is welded continuously in the longitudinal direction using a welding machine as described above, which requires an extremely large number of processing steps. However, since there are many manufacturing facilities, a considerable amount of space is required to install them, and each manufacturing process requires a significant amount of manpower.

[Means for solving problems]

This invention was made to solve the above problem, and a welding torch is built into the mold of a press machine for punching thin plates such as silicon steel plates, and the outer periphery of the laminated iron core material inside the mold. The present invention provides a laminated iron core manufacturing device characterized by welding parts.

[Effect]

The laminated core material, which is continuously punched out by a press machine, stacked in a progressive manner, and separated into predetermined thicknesses, is passed through a mold by a welding torch placed on its outer periphery. Therefore, the outer periphery is welded continuously to create a laminated core. That is, by incorporating a welding torch into the mold of a press machine that punches out a thin plate, the core material is punched out and the laminated core is separated to a predetermined thickness within the mold.
A series of manufacturing steps up to continuous welding of the laminated core separated into predetermined thicknesses can be carried out continuously and automatically with high precision.

〔Example〕

Fig. 1 and Fig. 2 both show one embodiment of the present invention. First, Fig. 1 shows a stage for removing the outer diameter of an iron core using a progressive die for punching a thin plate such as a silicon steel plate. 1 is a sectional view showing a die, 2 is a punch attached to a ram 12 that moves up and down,
Reference numeral 3 denotes a plurality of welding torches installed at predetermined positions in the lower part of the die, and each of the welding torches 3 is used to attach an iron core material 4 such as a silicon steel plate that has been pulled out onto the lifting table 6a by the die 1 and the punch 2. This is provided to weld the outer circumferential portion of a laminated iron core consisting of a laminated iron core continuously and simultaneously at four locations in the longitudinal direction. However,
The laminated core 5 on the lifting platform 6a, which has been welded to a predetermined thickness by the welding torch 3, is lowered to the upper part of the bolster 7 by the lowering of the lifting shaft 6 connected to, for example, a hydraulic cylinder (not shown). cylinder 13
is pushed out onto the chute 8 by the protruding action of
It is configured to be carried out of the die 1.

Note that as a means for separating the core material 4 into a predetermined thickness within the die 1, a ram 12 having a punch 2 is used to separate the number of core materials 4 corresponding to the predetermined thickness.
This is replaced by the number of times the cam descends and counted, and when a predetermined number of sheets is reached, the cam is moved in accordance with a predetermined program as shown in FIG. 2 at a stage preceding the stage shown in FIG. 17, the protrusion forming blade part 14 is pushed downward to form a protrusion 9 on one surface at a predetermined position calculated in advance in the length direction of the core material 4, and this is then pressed in a predetermined position using a die. If the width is punched out, gaps 10 will be formed for each predetermined thickness of the core materials 4 that are sequentially laminated. Even if the laminated core materials 4 are subsequently welded continuously, the core materials 4 are automatically separated at the gap 10, and a laminated core 5 of a predetermined thickness can be manufactured. It is done like this.

The welding speed with the welding torch 3 mentioned above is usually around 150 to 200 mm/min, but by increasing the speed of punching the core material 4 with the die 1 and punch 2, the number of strokes has increased. Even if the welding speed increases to about 600 to 800 r, p, m, the above welding speed will be around 300 to 400 mm/min, and it goes without saying that it can be followed sufficiently. In addition, the laminated core made of the core material 4 manufactured in the above-mentioned embodiment can be used for manufacturing all types of laminated cores, such as stator cores of motors or generators, rotor cores, and transformer cores. Needless to say, it can be used for.

〔Effect of the invention〕

According to the present invention, a welding torch 3 is installed inside a die 1, which is a mold of a press machine that punches a core material such as a silicon steel plate into a predetermined shape, and a laminated layer made of core materials 4 is laminated inside the die 1. Since the outer periphery of the core 5 can be welded continuously in the longitudinal direction, the alignment accuracy of the core material 4, which is troublesome when welding the laminated core 5, can be maintained extremely easily and with high precision using the die 1. In addition, since welding is performed inside the die 1, not only the processing steps and labor costs can be reduced, but also the installation area of equipment can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a stage for removing the outer diameter of an iron core according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view showing an intermittent drawing stage for forming protrusions at predetermined positions on the core material. . In the drawing, 1 is a die, 2 is a punch, 3 is a welding torch, 4 is a core material, 5 is a laminated core, 9 is a protrusion,
10 is a gap. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. In a press machine that continuously punches iron core material, it consists of a mold, a punch installed correspondingly to the mold, and a lifting platform arranged so as to be able to rise and lower below the mold. 1. A laminated iron core manufacturing apparatus, characterized in that a welding torch is incorporated therein, and the outer periphery of the laminated iron core made of core materials stacked on the lifting platform is welded inside a mold.