JPS585734B2 - How to punch out plate material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves applying punching oil 3 onto a plate material 2 that can be moved in one direction on a punching die 1, and then applying grooves 4 to match the punched shape.
is recessed on the plate material 2 with a groove processing punch 5, and after removing the punching oil 3 on the plate material 2 leaving the punching oil 3 in the groove 4 before punching, punching out the plate material 2 with a punch 6. The present invention relates to a method for punching out a plate material.

In the conventional method of punching out a plate material, as shown in FIG.
These punched iron cores 7 are sequentially stacked as they are,
Next, the laminated iron cores 7 were adhered one after another using an adhesive 8.

However, since the punching oil 3 remained on the laminated surface 9 of the iron core 7, many adhesion failures occurred, and when this iron core 7 was used as a ballast, the heat generated by the iron core 1 caused the core to break. There was a drawback that the oil 3 boiled out and accelerated the deterioration of the varnish impregnated into the iron core 7.

Furthermore, if this punching oil 3 is to be removed, a cleaning process is required, which has the disadvantage of impairing productivity.

The present invention has been made in view of the drawbacks of the conventional examples, and an object of the present invention is to remove unnecessary punching oil from punching on a sheet material, and to prevent poor adhesion and varnishing caused by the punching oil. To provide a method for punching out a plate material which can prevent accelerated deterioration of the material and has excellent productivity.

A first embodiment of the present invention will be described in detail below with reference to FIG.

The plate material 2 is a so-called hoop material for making something like the iron core 7 of the ballast, and is a long thin plate.

The punching die 1 is fixed and the end 1 is fixed in the feeding direction.
A punching hole 11 formed in a punched shape is bored on the zero side, and an alignment chute 13 and a guide plate 14 are provided on the back surface 12 of the punching die 1 in alignment with the punching hole 11.

The alignment chute 13 is curved in an arc shape, and the punched hole 11
gradually widens from the center portion 15 to the lower end 16 in a tapered shape.

Above the punching die 1, a punching oil applicator 17, a groove punch 5, a wiping tool 18, and a punch punch 6 are arranged in this order with respect to the feeding direction of the plate material 2.

The punching oil applicator 17 drips the punching oil 3 onto the plate material 2 and applies the punching oil 3 uniformly.

A grooving ridge 20 that matches the outer shape of the punch 6 is protruded from the lower surface 19 of the grooving punch 5. The grooving ridge 20 has a roughly V-shaped vertical section with a thick base and a narrow tip. The groove punch 5 is movable in the vertical direction.

The wiping tool 18 is made by wrapping something like cloth or sponge around the rotating shaft 21.

The punch 6 is formed into a punch shape and is movable in the vertical direction.

Thus, the plate material 2 is intermittently fed at regular intervals in the feeding direction.

The plate material 2 is aligned to the punching position using a pilot pin (not shown).

When the plate material 2 is sent below the punching oil applicator 17, the punching oil 3 is uniformly applied to the plate material 2 by the punching oil applicator 17.

When the plate material 2 is fed one pitch, it is located below the groove punch 5, and a groove 4 that matches the punched shape is formed on the plate material 2 by the groove punch 5, and the shape of this groove 4 is V-shaped. .

At this time, the punching oil 3 on the plate material 2 also enters the groove 4.

In addition, this punching oil 3 is applied to the grooving protrusion 2 of the grooving punch 5.
It functions to protect 0.

The grooved plate material 2 is fed one pitch and positioned below the wiping tool 18, and unnecessary punching oil 3 on the plate material 2 is removed from the wiping tool 18.
The punching oil 3 will remain only in the groove 4.

The plate material 2 from which the punching oil 3 has been wiped off is fed one pitch directly below the punch 6, and punched into a predetermined shape by the punch 6 and the punch die 1.

At this time, the punch 6 and the groove 4 of the plate material 2 are accurately aligned with the pilot pin, and the punch 6 punches out the groove 4.

The punched iron core 7 is passed through the punched hole 11 into the alignment chute 13
The adhesive 8 is applied at the lower end of the alignment chute 13.

22 is an adhesive supply nozzle. In this case, punching oil 3
The only part that is attached is the sheared surface 23 of the punched iron core 7, and the distance from the punching die 1 to the part where the adhesive 8 is applied is long enough, so the punching oil 3 does not dry naturally. , which does not adversely affect adhesion.

The punched plate material 2 is sequentially conveyed from the terminal end 10 of the punching die 1.

Note that the grooving protrusion 20 of the grooving punch 5 may be formed to match the outer shape of the punched shape, but may also be formed to match a part of the outer shape of the punched shape as shown in FIG.

Even in this case, the wiping die 1 in the groove 4 is not damaged during punching.

A second embodiment of the present invention will be described in detail with reference to FIG.

In this case, the wiping tool 18 is omitted, and instead, a ventilation hole 2 is provided inside the punch 6 and opened on the lower surface 24 of the punch 6.
5 is bored, and this ventilation hole 25 branches at the lower end,
A ventilation branch hole 25a that opens around the lower surface 24 of the punch 6 and a ventilation branch hole 25a that opens in the center of the lower surface 24.
is provided.

A strong wind may be blown out from this ventilation hole 25 to blow off unnecessary punching oil 3 on the plate material 2, and the punching oil 3 may be accumulated only in the groove 4.

Alternatively, hot air may be blown to speed up the drying of the surface of the plate material 2.

An example of the shape of the punched iron core 7 is approximately E-shaped, and FIG. 6 shows an example of a structure in which the iron cores 1 are laminated.

In the present invention, before punching, the punching oil on the plate material is removed while leaving the punching oil in the groove, and then the plate material is punched out with a punch, so that no punching oil remains on the surface where the iron cores are stacked. , The advantage is that the adhesive is not adversely affected by the punching oil, eliminating poor adhesion of the iron core, and even if the iron core generates heat when used as a ballast, the punching oil will not boil out. This has the advantage that the deterioration of the varnish impregnated into the iron core is not accelerated by the punching oil.The punching oil is applied to a plate that can be moved in one direction on the punching die, and then the punching shape is Since grooves that match the grooves are made on the plate material using a groove processing punch, the wall thickness of the part where the plate material should be punched becomes thinner, making punching easier, which greatly extends the lifespan of the punch and die. It can be extended, and due to the presence of grooves on the plate material, even if unnecessary punching oil on the plate material is wiped off, sufficient punching oil will remain in the groove, which is necessary for the shearing part of the punch. In addition, there is an advantage that sufficient punching oil is supplied and there is no chance of damaging the punch or punching die.Before punching, the punching oil on the plate material is removed while leaving the punching oil in the groove. This method has the advantage of not requiring cleaning equipment to remove punching oil.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an embodiment of the conventional example, Fig. 2 is a process explanatory diagram of another embodiment of the same as above, Fig. 3 is a longitudinal sectional view of an embodiment of the present invention, and Fig. 4 is the same as above. A partial vertical sectional view of another embodiment of
Fig. 5 is a perspective view of an embodiment of the groove processing same as above, Fig. 6 is a perspective view of an embodiment of the laminated iron core same as above, 1 is a punching die;
2... A plate material, 3 a punching oil, 4 a groove, 5 a groove punch, and 6 a punch punch.

Claims (1)

[Claims] 1. Apply punching oil to a plate material that can be moved in one direction on a punching die, then use a groove processing punch to create a groove on the plate material to match the punched shape, and before punching, insert punching oil into the plate material. A method for punching a plate material, which comprises removing punching oil on the plate material while leaving behind the punching oil, and then punching out the plate material with a punch. 2. The method for punching out a plate material according to claim 1, characterized in that the punching oil on the plate material is wiped off with a wiping tool such as a cloth or a sponge. 3. The method for punching out a plate material according to claim 1, characterized in that the punching oil is removed by strong wind blowing out from an air hole opened on the lower surface of the punch.