JPH07328733A - Pressing plate for press - Google Patents

Abstract

PURPOSE:To eliminate situation of being out of a lubricant with water evaporated even if a water lubricant is used, in holding a material with a holding plate, by retaining in a recessed groove a lubricant applied on the material, feeding it with the a material and providing a lubricating action. CONSTITUTION:In a press 1 in which a belt-like material 5 is fed by a prescribed distance in its longitudinal direction and punched through plural processes into a product, a pressing plate 6 for pressing the material 5 is provided above the material 5 so as to be movable up and down, and a recessed groove 10 extending in the advancing direction of the material 5 is grooved on the lower face of the pressing plate 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressing plate of a press machine for punching a material such as a metal plate to obtain a product having a predetermined shape. The present invention relates to an improvement of a pressing plate for pressing the material in a press machine for forming a product by a feeding and a plurality of punching steps.

[0002]

2. Description of the Related Art Conventionally, materials such as metal plates have been punched by a press machine to manufacture products having various shapes.

Depending on the shape of the product, the part of the shape of the product is punched in a plurality of steps to finally form the shape of the product. In that case,
While feeding the band-shaped material by a predetermined distance in the length direction,
Each step of the material is punched out at a specific place, and when all the steps are completed, a product having a desired shape is obtained.

Further, in such a pressing machine, in order to prevent the material from shifting from a predetermined position in the punching process,
The material is held from above with a holding plate and punched with a punch.

[0005]

When performing such punching, a lubricant is applied to the surface of the material so that the material can be smoothly sheared by the punch. An oily lubricant is usually used as the lubricant.

However, the oil-based lubricant has various problems such as being inflammable and dangerous, and also having a problem of odor, and the lubricant adheres to the surroundings to contaminate the working environment. Considering the use of lubricants,
Various water-based lubricants have been actually proposed.

In the pressing machine as described above, the material coated with the lubricant is pushed by the holding plate and punched while being fed by a predetermined distance, but the material is repeatedly punched by a plurality of punches. During this time, the temperature of the material rises due to frictional heat. Therefore, when a water-based lubricant is used, there is a problem that water in the lubricant volatilizes.

The lubricant applied to the material spreads on the surface of the material by being pressed by the pressing plate to form a thin film, and while the film is sent together with the material, it acts as a lubricant during punching. During the punching in a plurality of steps, the temperature rises, the water in the lubricant volatilizes, and the concentration of the lubricant increases.

As a result, the lubricant becomes sticky or, in an extreme case, it dries, and it becomes impossible to provide a proper lubricating action for punching. Therefore, the water-based lubricant can be used only when the number of steps is small enough to maintain the lubrication effect, and it cannot be applied to punching having many steps because of lack of lubrication.

The volatility of the oily lubricant can be controlled by selecting its components.
In a water-based lubricant, the solvent or dispersion medium is limited to water, regardless of the dissolved or dispersed components,
The volatility of the water itself cannot be controlled.

Although volatilization may be delayed by increasing the amount of the lubricant applied, the material is held by the holding plate at each punching step, so that even if a large amount of the lubricant is applied, the holding plate is pressed. By being pressed with, the lubricant is squeezed out to the surroundings and the amount left on the material cannot be increased.

The present invention has been made in view of the above circumstances, and when an aqueous lubricant is used, the increase in the concentration of the lubricant and the drying are suppressed, and it is also effective for punching in more steps. The purpose is to enable a lubricating action.

[0013]

According to the present invention, in a press machine for feeding a strip-shaped material by a predetermined distance in its length direction and punching a product by a plurality of steps, a presser for pressing the material above the material. It is characterized in that a plate is provided so as to be movable up and down, and a concave groove extending in the traveling direction of the material is formed on the lower surface of the holding plate.

FIG. 1 is a central longitudinal sectional view conceptually showing a press 1 according to the present invention. Reference numeral 2 is a base on which a plurality of dies 3 are formed. A plurality of punches 4 are provided above each die 3 so as to be vertically movable toward the die 3.

Reference numeral 5 denotes a strip-shaped material punched by the press machine 1, which is supplied from the right side in the drawing, and is intermittently fed to the left side on the base 2 by a predetermined distance at a time, and a plurality of materials are provided. The punch 4 and the die 3 are sequentially punched to finally obtain a product having a desired shape at the left end of the apparatus.

A pressing plate 6 is provided above the material 5 so as to be vertically movable, and has a through hole 7 through which the punch 4 passes.
Has been drilled. Reference numeral 8 is a coating device for coating the material 5 with the lubricant 9.

Thus, in the present invention, as shown in FIG. 2, a concave groove 10 extending in the traveling direction of the material 5 is formed on the lower surface of the pressing plate 6.

As shown in FIG. 2, the concave groove 10 has a holding plate 6
Although it may be engraved over the entire length of the holding plate 6 and the recessed grooves 10 may be opened at both ends of the holding plate 6, it does not necessarily have to extend over the entire length of the holding plate 6 and is intermittent. Does not matter. Further, the groove 10 may be closed at both ends of the holding plate 6 or at the edges of the through holes 7.

Further, as shown in the enlarged circle in FIG. 2 (b), it is preferable that the edge 11 of the concave groove 10 is smoothly edged to form no edge. Thus, by pressing the material 5 with the pressing plate 6, it is possible to prevent the shape of the concave groove 10 from being imprinted on the surface of the material 5.

A suitable depth of the groove 10 is about 0.1 to 1 mm. If the depth of the groove 10 is less than 0.1 mm, the effect of the present invention is not observed, and even if it is excessively deep, the action of pushing the lubricant 9 described later forward is poor.

A suitable width is about 1 to 10 mm.
If it is less than 1 mm, the effect of the present invention is not obtained, and if the width of the groove 10 is too large, the function of fixing the material 5 by the groove 10 may be impaired.

Further, when the width of the material 5 is small, one groove 10 may be provided, but it is preferable to provide a plurality of grooves 10 as the width of the material 5 becomes larger. Although it depends on the viscosity of the lubricant 9 and the size of the groove 10, it is appropriate that the interval between the grooves 10 is approximately 5 to 30 mm. If the distance between the grooves 10 is excessively large, the lubricant 9 may not be able to spread over the front surface of the material 5.

[0023]

The punching process of the pressing machine of the above-described embodiment will be described. The material 5 is supplied from the right side in FIG. 1, is intermittently fed over the base 2 by a predetermined distance, and advances to the left side.

At the starting end on the base 2, first, the lubricant 9 is applied to the material 5 by the application device 8.

Next, the material 5 is fed to the left by a predetermined distance and is pressed onto the base 2 by the pressing plate 6 from above, and in this state, the punch 4 in the first step is moved downward to the die 3 of the base 2. It is recessed, where the material 5 is punched out.

Next, the punch 4 is moved upward, the pressing plate 6 is further moved upward to release the pressing, and the material 5 is fed to the left by a predetermined distance. Then, it is pressed again by the pressing plate 6 and punched by the punch 4 and the die 3 in the second step.

In this way, the material 5 is fed to the left by a predetermined distance and is held by the holding plate 6 at that position,
In that state, the punch 4 and the die 3 in each step are sequentially punched to finally obtain a product having a predetermined shape.

Here, in the present invention, as described above, the concave groove 1 extending in the traveling direction of the material 5 is formed on the lower surface of the pressing plate 6.
0 is engraved.

Therefore, at the right end of FIG. 1, the lubricant 9 is applied to the surface of the material 5, and when it is sent to the left and pressed by the holding plate 6, the lubricant 9 attached to the material 5 becomes the material. 5 is spread to the surface of 5, and a part of the groove 1
It flows into 0 and is swept to the left.

In the conventional pressing plate 6 having a smooth lower surface,
Although it has the effect of spreading the lubricant 9 adhering to the material 5 over the surface thereof, the excess lubricant 9 is extruded from the edge of the material 5 and removed from the surface of the material 5.

However, according to the present invention, the surplus lubricant 9 can be retained on the surface of the material 5 by flowing into the groove 10.

When the holding plate 6 moves upward after the punching process, the lubricant 9 that has flowed into the concave groove 10 remains partially thick on the surface of the material 5, which causes the lubricant 9 to flow. It spreads to the surface of the material 5 around it due to its nature.

When the pressing plate 6 presses the material 5 again for the next punching process, the spread lubricant 9 causes the pressing plate 6 to spread.
The portion of the lower surface that is not the concave groove 10 spreads over the entire surface of the material 5.

In this way, each time the material 5 is fed to the left and is pushed by the holding plate 6, fresh lubricant 9 is fed from the right side along the groove 10 to the left side, and the holding plate 6 is pushed. While it is moving upward, it spreads from the position of the concave groove 10 to the periphery thereof, and is pressed by the pressing plate 6 again so that it can be further spread over the entire surface of the material 5.

In the conventional pressing plate 6, only the lubricant 9 which can exist between the lower surface of the smooth pressing plate 6 and the material 5 has a lubricating effect, and when the water is volatilized by the water-based lubricant, it is no longer appropriate. Although it cannot perform a lubricating action, in the present invention, since the lubricant 9 is retained in the concave groove 10 and gradually supplied to the entire surface of the material 5, water is volatilized in the water-based lubricant. Even so, the lubricating action can be maintained by the lubricant 9 supplied from the groove 10.

[0036]

According to the present invention, therefore, even when a water-based lubricant is used, water in the lubricant is volatilized to cause stickiness or dryness without losing the lubricating action. Even in a multi-step punching press, it is possible to effectively lubricate without causing lubrication failure.

In the drawing, the single punching plate 6 covers the entire punching process, but if there are more punching processes, two or more pushing plates 6 are arranged side by side in the advancing direction of the material 5. It is also possible.

Also in this case, since the lubricant 9 is attached to the material 5 and sent, the lubricant 9 does not run short in the pressing plate 6 on the other side.

Further, the present invention is particularly effective when the water-based lubricant 9 is used, but even when the oil-based lubricant 9 is used, a sufficient amount of the lubricant 9 is retained in the groove 10. Therefore, it is effective without causing lubrication even in punching with many steps.

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view conceptually showing a press machine of the present invention.

2A and 2B are views showing a holding plate in the press machine of the present invention, in which FIG. 2A is a bottom view and FIG. 2B is a side view. 1 Press machine 5 Material 6 Holding plate 10 Recessed groove

Claims (1)

[Claims] 1. In a press (1) for punching a product in a plurality of steps by feeding a strip-shaped material (5) along its length by a predetermined distance, the material (5) is placed above the material (5). A pressing machine characterized in that a pressing plate (6) for pressing is provided so as to be movable up and down, and a concave groove (10) extending in the traveling direction of the material (5) is formed on the lower surface of the pressing plate (6). Presser plate