JPH0923620A - Laser laminated die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the adjusting time and to allow a production line to meet mass production with providing a core punch, a die plate, a projection unit for laser welding the cut surface of a laminated core, and a mechanism for adjusting the projection unit in the direction of lamination. SOLUTION: A core punch 4 and a die plate 5 are provided and a projection unit 8 is moved up and down through a spacer 15 by turning a push screw 12 and shifting a slide cam 14 to the left and right. An adjusting mechanism for the projection unit 8 adjusts the welding position between laminated cores 11, which varies for each lot punched by means of the core punch 4, through a vertical slide mechanism for projection unit 8 in a lower die set 7 before the cut face of laminated core 11 is laser welded. This system can shorten the adjusting time and allow the production line to deal with mass production.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser mold, such as a motor core or an EI core, for welding a workpiece by using a laser beam.

[0002]

2. Description of the Related Art In recent years, in order to reduce the size and improve the performance of a motor, a laminated core which constitutes a stator is divided into units of pole teeth, insulated and wound, and then joined in a predetermined quantity in an annular shape. A manufacturing method of forming a stator is used. This requires the dimensional accuracy and bond strength of the individual subdivided laminated cores. Welding is performed in the mold using a laser instead of the conventional pack mold in which the cores are half blanked and the cores are joined together. Laser lamination molds for joining are in the spotlight.

The structure of a conventional laminated metal mold using a laser will be described below. FIG. 2 shows the structure of a conventional laser laminated die. In FIG. 2, 1 is a punch backing, 2 is a punch plate, 3 is a stripper plate, 4 is a punch, 5 is a die plate, 6 is a die backing, 7 is a lower die set, 8 is an emission unit, and 9 is for height adjustment. The shim, 10 is a material, and 11 is a laminated product.

The operation of the laser laminated die having the above structure will be described. First, the material is punched by the punch 4 and laminated in the die plate 5, the die backing 6, and the lower die set 7. The core of the laminated product 11 is spot-welded to the laminated product from the side of the lower die set 7 by the laser of the emission unit 8. At this time, the position of spot welding was adjusted by changing the thickness of the height adjusting shim 9 below the emitting unit.

[0005]

However, in the above-mentioned conventional structure, the change in the thickness of the coil material, which changes in each lot received from the material manufacturer in the production line,
Since the emitting unit is removed and the height of the shim is adjusted each time, there is a problem that a considerable amount of time is required to adjust the height when replacing the coil.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a stable laminated product by shortening the adjustment time, corresponding to the mass production of the production line, and by an easy method. .

[0007]

In order to achieve this object, the laser laminated die of the present invention has a mechanism for adjusting the emitting unit in the lower die set in the laminating direction.

[0008]

With this configuration, the welding position between the cores that are punched and laminated in the laser lamination mold and change from lot to lot is adjusted to the proper position by adjusting the emission unit vertical slide mechanism of the lower die set. The spot of welding can be applied and the reliability and bond strength of laser welding can be improved.

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially enlarged view of a height adjusting mechanism of an emitting unit of a laser laminated mold according to an embodiment of the present invention.

In FIG. 1, 1 is a bunch backing, 2
Is a punch plate, 3 is a stripper plate, 4 is a punch, 5 is a die plate, 6 is a die backing, 7 is a lower die set, 8 is an output unit, 10 is a material, 11 is a laminated product, 12 is a push screw, 13 is a Fixed block, 14 is a slide cam, 15 is a spacer, 16 is a slide guide,
Reference numeral 17 is a tension spring.

The operation of the laser laminated die having the above structure will be described with reference to FIG. First, by rotating the push screw 12, the slide cam 14 moves left and right, and the emission unit 8 is moved up and down via the spacer 15. The adjusting mechanism of this emitting unit can always obtain the optimum emitting point by adjusting the welding position between the core, which is punched and laminated and changes for each lot, by adjusting the emitting unit vertical slide mechanism of the lower die set. The work time when replacing the coil material can be greatly reduced, and an excellent effect can be obtained in that the productivity is dramatically improved as compared with the conventional die structure.

[0013]

As described above, according to the present invention, by providing a mechanism for adjusting the emitting unit in the laminating direction in the lower die set of the laser laminating die, it is possible to reduce the emission spot when the coil material is replaced or the material thickness varies. In the adjustment, the working time can be shortened and the productivity can be improved.

[Brief description of drawings]

FIG. 1 is a partially enlarged view of a height adjusting mechanism of an emitting unit of a laser laminated mold according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of a conventional laser laminated mold structure.

[Explanation of symbols]

 1 Punch Backing 2 Punch Plate 3 Stripper Plate 4 Punch 5 Die Plate 6 Die Backing 7 Lower Die Set 8 Ejection Unit 9 Height Adjustment Shim 10 Material 11 Laminated Product 12 Push Screw 13 Fixing Block 14 Slide Cam 15 Spacer 16 Slide Guide 17 Tension spring

Claims (1)

[Claims] 1. A laser laminated mold comprising a core punching punch, a die plate, an emitting unit for laser-welding a cut surface of a laminated core, and a mechanism for adjusting the emitting unit in a laminating direction.