CN102921825B - Automatic material device that draws of mould - Google Patents

Abstract

The invention discloses a material pulling device of a die, and aims to solve the technical problems of providing an automatic material pulling device of a die, which has the advantages that a material belt cannot fall back, the appearance of a punched product cannot be damaged, the service life of the device is long, and the device is suitable for high-speed punching. In order to solve the problems, the technical scheme adopted by the invention comprises a wedge-shaped punch head arranged on an upper die and a material pulling base arranged on a lower die, wherein a sliding block mechanism is arranged in the material pulling base, and a material pulling needle, a sliding arm and a reset spring are arranged on the sliding block mechanism, and the material pulling device is characterized in that: the slider mechanism front end both sides are equipped with the needle groove, draw the material needle and be the slice, its upper end has a syringe needle, the supplied materials one side of syringe needle has first slope, and relative one side is the perpendicular, draw the material needle and pass through the axle and install in the needle groove, its syringe needle stretches out the needle groove.

Description

A mold automatic pulling device

technical field

The invention relates to a material pulling device for a mold, in particular to a material pulling device for a stamping die.

Background technique

At present, the continuous stamping of the stamping die generally uses strip-shaped stamping raw materials, and the mold is stamped once, and the strip is moved once at a fixed distance until the product is completed. The traditional fixed-distance movement of the strip is mainly realized by the feeder of the punch press. However, for stamping raw materials that are soft and weak and have many molding processes, if the feeder of the punching machine is used to feed the material, the material will be bent due to the weakness of the material during the feeding process, and often due to the feeding of the material If the distance is not in place, the die will fail, which will interrupt the stamping process and lead to low production efficiency.

In recent years, a material pulling device has appeared. For example, the Chinese utility model patent specification CN201244630Y announced on May 27, 2007 discloses such a material pulling device. This device includes a wedge-shaped punch installed on the upper die, and a drawing base installed on the lower die. A slider mechanism is arranged in the drawing base, and a drawing needle, a sliding arm and a reset The spring has a pulling pin fixedly arranged on the slider mechanism. The pulling device of this structure solves some shortcomings of the feeder to a certain extent, but the disadvantages are:

1. Due to the fixed combination of the pull needle and the slider mechanism, when the slider mechanism is reset, the pull needle sometimes drives the material belt backwards, resulting in unqualified punched products.

2. Due to the fixed combination of the pulling needle and the slider mechanism, when pulling the material, the pulling needle will cause the material belt to fluctuate greatly, resulting in scratches on the product and damage to the appearance. In addition, the pull pin itself is also susceptible to wear and needs to be replaced frequently, resulting in an increase in mold maintenance costs and a decrease in product production efficiency.

3. With the development of stamping die technology, from the previous medium and low-speed stamping, it has developed to the current high-speed stamping, and the existing pulling device cannot adapt to high-speed stamping well. Due to the fixed combination of the pulling needle and the slider mechanism, the pulling needle will cause the material belt to fluctuate upward when pulling the material, and the next step of pulling the material can only be completed after the material belt falls flat, otherwise the pulling needle will be empty. However, due to the high-speed stamping speed is very fast, the next stamping action is often started before the material strip is dropped, resulting in the phenomenon of empty drawing, which leads to the interruption of the stamping process and low production efficiency.

Contents of the invention

The technical problem to be solved by the present invention is to provide an automatic mold pulling device for high-speed stamping that does not backtrack the material strip, does not damage the appearance of the stamped product, has a long service life, and is suitable for high-speed stamping.

In order to solve the above problems, the technical solution adopted by the present invention includes a mold automatic pulling device, including a wedge-shaped punch installed on the upper die, and a pulling base installed on the lower die, and a slider mechanism is arranged in the pulling base , the slider mechanism is provided with a pull needle, a sliding arm and a return spring, and it is characterized in that needle grooves are arranged on both sides of the front end of the slider mechanism, and the pull needle is in the shape of a sheet, and its upper end has a needle , the incoming material side of the needle head has a first slope, and the opposite side is a vertical surface, the material pulling needle is installed in the needle groove through the shaft, and its needle head protrudes from the needle groove; the front end of the material pulling base has two The side is connected with the left and right side walls by setting slide rails, and the left and right side walls are provided with a chute that is slidably matched with the sliding arm, and the chute is provided with an installation gap near the return spring; There is a bearing, and the wedge-shaped punch cooperates with the slider mechanism through the bearing.

The mold automatic material pulling device is characterized in that: a notch is provided at the front end of the material pulling base, and anti-return protrusions are arranged on both sides of the bottom surface of the notch, and the incoming material of the anti-return protrusion One side has a second slope and the opposite side is vertical.

The automatic mold pulling device is characterized in that: a notch is set at the front end of the pulling base, and pressing shafts are set on the inner walls of both sides of the notch.

The automatic mold pulling device is characterized in that: the inner walls of both sides of the notch are provided with pressing shafts.

The automatic mold pulling device is characterized in that: the pulling base is provided with a top cover.

In the present invention, needle grooves are arranged on both sides of the front end of the slider mechanism, and the pulling needle is designed into a sheet shape, and a needle head is provided at the upper end thereof. The incoming material side of the needle head has a first slope, and the opposite side is a vertical surface, and the pulling needle is installed in the needle groove through the shaft, and the needle head extends out of the needle groove. In the reset state, the slider mechanism is acted by the reset spring, and it is close to the front end of the pulling base, the pulling needle is vertical, and the needle head protrudes out of the needle groove, and is connected with the material on both sides of the material belt (the material belt is shown in Figure 7). Anastomosis with holes. When the upper die is pressed down, the wedge-shaped punch drives the slider mechanism to move backward. Since the side of the needle of the pulling needle is a vertical surface, the needle will hook the material belt and drive the material belt to move forward, thereby completing the material pulling. When the upper die rises, the slider mechanism starts to reset under the action of the return spring. During the reset process, since the pulling needle is installed in the needle groove through the shaft, it is movably connected with the slider mechanism, and one side has the first slope , when the pulling needle receives a certain pressure from the material belt, the needle head will be pressed into the needle groove, so as not to drive the material belt back and cause the material belt to fluctuate, and finally overcome some shortcomings of the existing material puller.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of slider mechanism of the present invention;

Fig. 3 is the schematic structural view of the pulling needle of the present invention;

Fig. 4 is a schematic structural view of the front end of the pulling base of the present invention;

Figure 5 is a partial enlarged view of Figure 1;

Fig. 6 is a cross-sectional view of the slider mechanism, showing the connection relationship between the pulling needle and the needle groove;

Fig. 7 is a schematic diagram of the structure of the material belt.

detailed description

As shown in Figures 1 to 6, the mold automatic pulling device of the present invention includes a wedge-shaped punch 1 installed on the upper die, and a drawing base 2 installed on the lower die, and a slide is arranged in the drawing base 2 Block mechanism 4, needle grooves 8 are provided on both sides of the front end of the slider mechanism 4, the needle grooves can be arranged in parallel or front and back, the middle position is provided with a sliding arm 6, and the rear end is provided with a return spring 7, and the other end of the return spring is connected to the pull material The base is connected at the rear. The pulling needle 5 is installed through the shaft 11 in the needle groove 8 . The pull needle 5 is sheet-shaped, and has a needle 9 at its upper end. The incoming material side of the needle 9 has a first slope 10 , and the opposite side is a vertical surface. The needle 9 protrudes from the needle groove 8 .

In order to further optimize the present invention, a notch 12 is provided at the front end of the pulling base 2, and anti-return protrusions 13 are arranged on both sides of the bottom surface of the notch 12, and the incoming material side of the anti-return protrusion 13 has a second slope 14, The opposite side is a vertical plane. The anti-return protrusion corresponds to the position of the pull needle. Setting the anti-return protrusion can further prevent the phenomenon of material return during the stamping process of the mold.

When the material belt advances, the incoming material side of the anti-return protrusion 13 has a second slope 14, which can allow the material belt to advance normally. When the material belt is returned due to some external cause, its opposite side is a vertical surface. It can prevent the tape from going backwards. In addition, a pressing shaft 15 may also be provided on the inner walls of both sides of the notch 12 . The material band passes below the binder shaft 15 . After setting the pressing shaft, the material belt is more stable during the movement. The anti-return protrusion and the pressing shaft of the present invention can be arranged independently or in combination, and the effect of the combined arrangement is more ideal.

The pulling device in the prior art is directly stressed by the sliding arm 6 through the wedge-shaped punch 1, so that the slider mechanism 4 moves backward. The disadvantage is that the wear between the wedge-shaped punch and the sliding arm is particularly large, and during the stamping process In the middle, especially in the process of high-speed stamping, large vibration will be generated, which will affect the precision of stamping products. For this reason, the present invention is provided with bearing 16 at two ends of slide arm 6, and wedge-shaped punch 1 cooperates with slider mechanism 4 through bearing 16. The shortcoming existing in the prior art is effectively solved.

In addition, both sides of the front end portion 17 of the pulling material base 2 of the present invention are connected with the left and right side walls 3 by setting the slide rails 18, and the left and right side walls 3 are provided with a chute 19 that is slidably matched with the sliding arm 6. 19 is provided with an installation notch 20 near the side of the return spring 7 . The automatic pulling device of this structure is very convenient to disassemble and easy to install and maintain. In addition, a top cover 21 is provided on the upper end of the material pulling base 2, and the top cover can further prevent the fluctuation of the material belt and the entry of dust.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention. Inside.

Claims (5)

1. A mold automatic pulling device, comprising a wedge-shaped punch (1) installed on the upper die, and a drawing base (2) installed on the lower die, a slide block is arranged in the drawing base (2) mechanism (4), the slider mechanism (4) is provided with a pull needle (5), a sliding arm (6) and a return spring (7), and it is characterized in that: both sides of the front end of the slider mechanism (4) A needle groove (8) is provided, and the pulling needle (5) is sheet-shaped, with a needle head (9) at its upper end, and the incoming material side of the needle head (9) has a first slope (10), opposite to a The side is a vertical surface, and the pulling needle (5) is installed in the needle groove (8) through the shaft (11), and its needle head (9) stretches out of the needle groove (8); the front end of the pulling base (2) The two sides of the part (17) are connected with the left and right side walls (3) by setting slide rails (18), and the left and right side walls (3) are provided with chute (19) slidingly matched with the sliding arm (6). The chute (19) is provided with an installation gap (20) near the side of the return spring (7); the two ends of the sliding arm (6) are provided with bearings (16), and the wedge-shaped punch (1) passes through the bearing (16). ) cooperate with the slider mechanism (4). 2. The mold automatic material pulling device according to claim 1, characterized in that: a notch (12) is provided at the front end of the material pulling base (2), and anti- The material return protrusion (13), the incoming material side of the material return prevention protrusion (13) has a second slope (14), and the opposite side is a vertical surface. 3. The mold automatic material pulling device according to claim 1, characterized in that: a notch (12) is set at the front end of the material pulling base (2), and pressing materials are set on the inner walls of both sides of the notch (12) Shaft (15). 4. The mold automatic pulling device according to claim 2, characterized in that: the inner walls of both sides of the notch (12) are provided with pressing shafts (15). 5. The automatic mold pulling device according to claim 1, characterized in that: the pulling base (2) is provided with a top cover (21).