CN219169282U - Negative angle one-step forming die of progressive die - Google Patents

Abstract

A negative angle one-step forming die of a progressive continuous die comprises an upper die base, an upper die core, a lower die base, a lower die core and a linear driving mechanism; the upper die core comprises an upper inner die core, an upper outer die core and an upper elastic connecting piece; the outer side of the upper inner die core is provided with a wedge-shaped sliding seat, the outer wall of the wedge-shaped sliding seat gradually inclines inwards from the top end to the bottom end, the upper outer die core slides and is limited on the inclined outer wall of the wedge-shaped sliding seat, the outer wall of the upper outer die core is provided with a negative angle forming groove, and the upper outer die core corresponds to an upper elastic connecting piece embedded on the lower surface of the upper die seat; the lower die core comprises a lower inner die core, a lower outer die core and a lower elastic connecting piece; the lower inner die core is connected with the lower die base through a lower elastic connecting piece, the lower outer die core is driven by the linear driving mechanism to be close to or far away from the lower inner die core, and the inner side wall of the lower outer die core is matched with the outer wall of the negative angle of the product to be formed. The whole scheme can realize once negative angle shaping, need not to bend twice, is applicable to in progressive die, and machining efficiency is high, and the drawing of patterns is not fragile product.

Description

Negative angle one-step forming die of progressive die

Technical Field

The utility model relates to the field of progressive die processing, in particular to a negative angle one-step forming die of a progressive die.

Background

The progressive die (also called progressive die) is composed of a plurality of stations, each station is sequentially associated to complete different processing, and a series of different punching processing is completed in one stroke of the punching machine. After the one stroke is completed, the material is moved forward by the punch feeder at a fixed step distance, so that a plurality of procedures, such as punching, blanking, bending, trimming, deep drawing and the like, can be completed on one die.

When some sheet metal part products are formed by stamping, the stamping bent edges of the sheet metal part products are in an inward folding shape (see fig. 7), or the inner side surfaces of the bent edges are provided with bulges (see fig. 8), so that negative angles (acute angles) are formed at bent positions of the bent products.

The negative angle punched product can generate the following problems during punching:

1. the negative angle cannot be bent and formed once, and needs to be bent once in the longitudinal direction (at right angles) and then bent once in the transverse direction (at negative angles), namely, needs to be bent twice; therefore, a bending station is added in the continuous die, the structure is more complex, the cost is high, and the processing efficiency of the whole continuous die is reduced.

2. After the product negative angle is formed, the product negative angle and the upper die form a back-off structure, and the negative angle is easy to break during demolding.

Therefore, how to solve the above-mentioned problems is an object to be studied and solved by the present utility model.

Disclosure of Invention

The utility model aims to provide a negative angle one-step forming die of a progressive continuous die.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a negative angle one-step forming die of a progressive continuous die comprises an upper die base, an upper die core, a lower die base, a lower die core and a linear driving mechanism;

the upper die core comprises an upper inner die core, an upper outer die core and an upper elastic connecting piece; the outer side of the upper inner die core is provided with a wedge-shaped sliding seat, the outer wall of the wedge-shaped sliding seat gradually inclines inwards from the top end to the bottom end, the upper outer die core slides and is limited on the inclined outer wall of the wedge-shaped sliding seat, the outer wall of the upper outer die core is provided with a negative angle forming groove, and the upper outer die core corresponds to the upper elastic connecting piece embedded on the lower surface of the upper die seat;

the lower die core comprises a lower inner die core, a lower outer die core and a lower elastic connecting piece; the lower inner die core is connected with the lower die holder through the lower elastic connecting piece, the lower outer die core is driven by the linear driving mechanism to be close to or far away from the lower inner die core, and the inner side wall of the lower outer die core is matched with the outer wall of the negative angle of the product to be formed.

In the whole scheme, the wedge-shaped sliding seat and the upper outer die core are matched with two wedge-shaped blocks, when the upper die moves downwards to perform forming work, the upper outer die core can gradually move outwards and approach the lower outer die core when meeting a product to be formed, and the upper elastic connecting piece and the lower elastic connecting piece store force to finally form the whole upper die core with the upper inner die core to finish negative angle forming; when demoulding, the linear driving mechanism drives the lower outer die core to be far away from the lower inner die core, and the formed product is ejected out under the reaction force of the upper elastic connecting piece and the lower elastic connecting piece, and the upper outer die core is gradually retracted, so that easy demoulding is realized.

Therefore, the whole scheme can realize one-time negative angle forming, does not need to bend twice in the longitudinal direction and the transverse direction, is suitable for progressive dies, and has high forming precision, high processing efficiency, easy demoulding and no damage to products.

According to a further technical scheme, the upper inner die core and the upper outer die core are in sliding fit through a sliding block and a sliding groove.

According to a further technical scheme, the sections of the sliding block and the sliding groove are in a dovetail shape or a T shape; for small and medium-sized dies, dovetail-shaped sliding blocks and sliding grooves can be adopted; for large molds, two pairs of T-shaped slides and runners may be used.

According to a further technical scheme, the upper inner die core and the wedge-shaped sliding seat are limited through mutually buckled step surfaces, so that the upper outer die core falls down to the lower part of the upper inner die core and cannot fall down under the action of gravity.

According to the further technical scheme, the bottom edge of the upper outer die core is provided with a round angle, so that the upper outer die core is prevented from damaging a product when contacting with the molded product and moving on the surface of the product; in addition, the upper and lower elastic connecting pieces can enable the upper outer die core to slide without damaging products.

According to the technical scheme, the limiting plate is arranged on the lower surface of the upper die seat corresponding to the outer side of the lower outer die core, the limiting plate is attached to the outer side wall of the lower outer die core after the upper die is completely pressed down, so that the lower outer die core is supported, the lower outer die core and the upper die core clamp the bending part of a product, and the forming quality is high.

According to the technical scheme, the bottom end of the upper elastic connecting piece is attached to the upper surface of the upper outer die core in a natural state, and the lower surface of the upper outer die core is located below the lower surface of the upper inner die core at the moment, so that the upper outer die core can move outwards when the upper die moves downwards, and the upper outer die core can retract downwards when the upper die moves upwards.

According to the further technical scheme, the upper elastic connecting piece in the compressed state is not separated from the upper surface of the upper inner die core, so that the upper elastic connecting piece can still prop against the upper inner die core in the fully compressed state, and the forming stability is guaranteed.

According to a further technical scheme, the upper elastic connecting piece comprises a spring and a push rod, the top end of the push rod is connected with the upper die base through the spring, the bottom end of the push rod corresponds to the upper surface of the upper outer die core, and the spring is compressed to store force as long as the upper outer die core is in contact with a product.

According to the technical scheme, the lower elastic connecting piece in a natural state ejects the lower inner die core in the lower die holder, and the upper surface of the lower inner die core which is ejected out is higher than the upper surface of the lower outer die core, so that when the upper outer die core presses a product on the lower inner die core, the lower inner die core has certain elasticity, and the product is not hard extruded when the upper outer die core horizontally moves on the surface of the product, and the product is prevented from being worn.

According to a further technical scheme, the lower elastic connecting piece comprises an ejection support and an elastic ejection mechanism arranged at the bottom end of the ejection support, and the ejection support penetrates through the lower die holder and is connected with the lower inner die core.

The working principle and the advantages of the utility model are as follows:

in the whole scheme, two wedge blocks are matched between the wedge slide seat and the upper outer die core, when the upper die moves downwards to perform forming work, the upper outer die core can gradually move outwards when meeting a product to be formed, and the upper elastic connecting piece and the lower elastic connecting piece store force, so that the whole upper die core is formed with the upper inner die core to finish negative angle forming; when demoulding, the linear driving mechanism drives the lower outer die core to be far away from the lower inner die core, the upper outer die core is gradually retracted under the reaction force of the upper elastic connecting piece and the lower elastic connecting piece, and the formed product can be easily demoulded and ejected; the whole scheme can realize once negative angle shaping, need not to vertically and transversely bend twice in two directions, is applicable to in progressive die, and the shaping precision is high, and machining efficiency is high, and the drawing of patterns is easy and can not damage the product.

The arrangement of the upper elastic connecting piece and the lower elastic connecting piece and the arrangement of the bottom edge rounding of the upper outer die core can prevent the upper outer die core from damaging a product when contacting a molded product and moving on the surface of the product.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model before molding;

FIG. 2 is a schematic diagram of the overall structure of the embodiment of the present utility model when formed;

FIG. 3 is an enlarged view of part A of FIG. 2 according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a wedge sled and an upper outer core according to an embodiment of the present utility model;

FIG. 5 is a diagram showing the cooperation of dovetail sliding blocks according to an embodiment of the present utility model;

FIG. 6 is a T-shaped chute slider mating diagram in accordance with an embodiment of the present utility model;

FIG. 7 is a schematic view of a structure in which a product according to an embodiment of the present utility model is folded into an adduction shape;

FIG. 8 is a schematic view showing the structure of the inner side surface of the folded edge of the product according to the embodiment of the utility model.

In the above figures: 1. an upper die holder; 2. an upper die core; 210. an upper inner mold core; 220. an upper outer mold core; 230. an upper elastic connecting piece; 240. a negative angle forming groove; 250. a wedge slide; 3. a lower die holder; 4. a lower die core; 410. a lower inner mold core; 420. a lower outer mold core; 430. a lower elastic connection member; 5. a linear driving mechanism; 6. a slide block; 7. a chute; 8. a step surface; 9. and a limiting plate.

Detailed Description

The utility model is further described below with reference to the accompanying drawings and examples:

examples: the present utility model will be described in detail with reference to the drawings, wherein modifications and variations are possible in light of the teachings of the present utility model, without departing from the spirit and scope of the present utility model, as will be apparent to those of skill in the art upon understanding the embodiments of the present utility model.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. Singular forms such as "a," "an," "the," and "the" are intended to include the plural forms as well, as used herein.

As used herein, "connected" or "positioned" may refer to two or more components or devices in physical contact with each other, or indirectly, or in operation or action with each other.

As used herein, the terms "comprising," "including," "having," and the like are intended to be open-ended terms, meaning including, but not limited to.

The term (terms) as used herein generally has the ordinary meaning of each term as used in this field, in this disclosure, and in the special context, unless otherwise noted. Certain terms used to describe the present disclosure are discussed below, or elsewhere in this specification, to provide additional guidance to those skilled in the art in connection with the description herein.

The terms "front", "rear", "upper", "lower", "left", "right" and the like used herein are directional terms, and are merely used to describe positional relationships among the structures in the present application, and are not intended to limit the present protection scheme and the specific direction in actual implementation.

Referring to fig. 1-6, a negative angle one-step forming die of a progressive continuous die comprises an upper die holder 1, an upper die core 2, a lower die holder 3, a lower die core 4 and a linear driving mechanism 5;

the upper die core 2 comprises an upper inner die core 210, an upper outer die core 220 and an upper elastic connecting piece 230; the outer side of the upper inner mold core 210 is provided with a wedge-shaped sliding seat 250, the outer wall of the wedge-shaped sliding seat 250 gradually inclines inwards from the top end to the bottom end, the upper outer mold core 220 slides and is limited on the inclined outer wall of the wedge-shaped sliding seat 250, the outer wall of the upper outer mold core 220 is provided with a negative angle forming groove 240, and the upper outer mold core 220 corresponds to the upper elastic connecting piece 230 embedded on the lower surface of the upper mold base 1;

the lower die core 4 comprises a lower inner die core 410, a lower outer die core 420 and a lower elastic connecting piece 430; the lower inner mold core 410 is connected with the lower mold base 3 through the lower elastic connecting piece 430, the lower outer mold core 420 is driven by the linear driving mechanism 5 to approach or separate from the lower inner mold core 410, and the inner side wall of the lower outer mold core 420 is matched with the outer negative angle wall of the product to be molded.

The upper inner mold core 210 and the upper outer mold core 220 are in sliding fit through a sliding block 6 and a sliding groove 7, wherein the sections of the sliding block 6 and the sliding groove 7 are in a dovetail shape or a T shape; for small and medium-sized dies, dovetail-shaped sliding blocks 6 and sliding grooves 7 can be adopted; for large moulds, two pairs of T-shaped slides 6 and runners 7 may be used.

The upper inner mold core 210 and the wedge slide 250 are limited by the mutually buckled step surfaces 8, so that the upper outer mold core 220 falls down to the lower part of the upper inner mold core 210 under the action of gravity and cannot fall down.

The bottom edge of the upper outer mold 220 is rounded to avoid damage to the product when contacting the molded product and moving over the surface of the product.

The lower surface of the upper die holder 1 corresponding to the outer side of the lower outer die core 420 is provided with a limiting plate 9, and the limiting plate 9 is attached to the outer side wall of the lower outer die core 420 after the upper die is completely pressed down.

The bottom end of the upper elastic connecting member 230 in a natural state is attached to the upper surface of the upper outer mold core 220, and the lower surface of the upper outer mold core 220 is located below the lower surface of the upper inner mold core 210, so that the upper outer mold core 220 can move outwards when the upper mold moves downwards, and the upper outer mold core 220 can retract downwards when the upper mold moves upwards.

The upper elastic connecting piece 230 in the compressed state is not separated from the upper surface of the upper inner mold core 210, so that the upper elastic connecting piece 230 can still support the upper inner mold core 210 in the fully compressed state, and the molding stability is ensured.

The upper elastic connecting piece 230 comprises a spring and a push rod, the top end of the push rod is connected with the upper die holder 1 through the spring, the bottom end of the push rod corresponds to the upper surface of the upper outer die core 220, and the spring is compressed to store force as long as the upper outer die core 220 contacts with a product.

The lower elastic connecting member 430 in a natural state ejects the lower inner mold 410 in the lower mold base 3, and the upper surface of the lower inner mold 410 being pushed out is higher than the upper surface of the lower outer mold 420, so that when the upper outer mold 220 presses the product on the lower inner mold 410, the lower inner mold 410 has a certain elasticity, so that the upper outer mold 220 is not hard pressed when the surface of the product moves horizontally, and the product is prevented from being worn.

The lower elastic connecting piece 430 includes an ejection bracket and an elastic ejection mechanism disposed at the bottom end of the ejection bracket, where the ejection bracket penetrates through the lower die holder 3 to be connected with the lower inner die core 410, and the elastic ejection mechanism may use a compression spring.

In the above scheme, the upper inner mold core 210 and the upper outer mold core 220 are matched by two wedge blocks, and when the upper mold moves downwards to perform forming work, the specific steps are as follows:

firstly, a linear driving mechanism 5 drives a lower outer die core 420 to be close to a lower inner die core 410, and a product to be formed is placed on the lower outer die core 420 and the lower inner die core 410;

then, the upper die driving mechanism drives the upper die to move downwards, namely the upper die holder 1 drives the upper die core 2 to move downwards, the upper die core 220 is firstly contacted with a product to be formed, at the moment, the upper and lower elastic connecting pieces store force, in the continuous downward moving process, the upper die core 220 and the upper die core 210 are matched through the sliding block 6 and the sliding groove 7, the upper die core 220 gradually moves outwards, finally, the whole upper die core 2 is formed with the upper die core 210, at the moment, the limiting plate 9 is jointed with the outer side wall of the lower die core 420, the lower die core 420 and the lower die core 410 form the whole lower die core 4, and a height difference exists between the lower die core 420 and the lower die core 410, so that the product to be formed can be bent in the gradual downward moving process of the upper die core 220, and the bending part is gradually pushed to be jointed with the inner side wall of the lower die core 420, so as to form a negative angle;

finally, the lower outer mold core 420 is driven by the linear driving mechanism 5 to be far away from the lower inner mold core 410, the upper mold is driven by the upper mold driving mechanism to move upwards, and the upper outer mold core 220 gradually moves outwards and moves upwards to be separated from the formed product under the action of the reaction force of the upper elastic connecting piece 230 and the gravity of the upper outer mold core 220; the upper mold is moved up, and then the lower mold core 4 is not stressed, and the lower inner mold core 410 is moved up under the reaction force of the lower elastic connecting piece 430, so that the molded product is ejected out to the upper side of the lower outer mold core 420, and the molded product is taken out conveniently.

The whole scheme can realize once negative angle shaping, need not to vertically and transversely bend twice in two directions, is applicable to in progressive die, and the shaping precision is high, and machining efficiency is high, and the drawing of patterns is easy and can not damage the product.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (10)

1. The utility model provides a negative angle one shot forming mould of progressive die which characterized in that: comprises an upper die holder (1), an upper die core (2), a lower die holder (3), a lower die core (4) and a linear driving mechanism (5);

the upper die core (2) comprises an upper inner die core (210), an upper outer die core (220) and an upper elastic connecting piece (230); the outer side of the upper inner die core (210) is provided with a wedge-shaped sliding seat (250), the outer wall of the wedge-shaped sliding seat (250) gradually inclines inwards from the top end to the bottom end, the upper outer die core (220) slides and is limited on the inclined outer wall of the wedge-shaped sliding seat (250), the outer wall of the upper outer die core (220) is provided with a negative angle forming groove (240), and the upper outer die core (220) corresponds to the upper elastic connecting piece (230) embedded on the lower surface of the upper die seat (1);

the lower die core (4) comprises a lower inner die core (410), a lower outer die core (420) and a lower elastic connecting piece (430); the lower inner die core (410) is connected with the lower die holder (3) through the lower elastic connecting piece (430), the lower outer die core (420) is driven by the linear driving mechanism (5) to be close to or far away from the lower inner die core (410), and the inner side wall of the lower outer die core (420) is matched with the negative angle outer wall of a product to be formed.

2. The negative angle one-shot forming die of a progressive die according to claim 1, wherein: the upper inner die core (210) and the upper outer die core (220) are in sliding fit through a sliding block (6) and a sliding groove (7).

3. The negative angle one-shot forming die of a progressive die according to claim 2, wherein: the sections of the sliding block (6) and the sliding groove (7) are in a dovetail shape or a T shape.

4. The negative angle one-shot forming die of a progressive die according to claim 1, wherein: the upper inner die core (210) and the wedge-shaped sliding seat (250) are limited through mutually buckled step surfaces (8), and the bottom edge of the upper outer die core (220) is provided with a rounding angle.

5. The negative angle one-shot forming die of a progressive die according to claim 1, wherein: the lower die core (420) is characterized in that a limiting plate (9) is arranged on the lower surface of the upper die holder (1) corresponding to the outer side of the lower die core (420), and the limiting plate (9) is attached to the outer side wall of the lower die core (420).

6. The negative angle one-shot forming die of a progressive die according to claim 1, wherein: the bottom end of the upper elastic connecting piece (230) in a natural state is attached to the upper surface of the upper outer die core (220), and the lower surface of the upper outer die core (220) under the action of gravity is positioned below the lower surface of the upper inner die core (210).

7. The negative angle one-shot forming die of a progressive die according to claim 1, wherein: the upper elastic connection piece (230) in the compressed state is not separated from the upper surface of the upper inner die core (210).

8. The negative angle one-shot forming die of a progressive die according to claim 1, wherein: the upper elastic connecting piece (230) comprises a spring and a push rod, the top end of the push rod is connected with the upper die holder (1) through the spring, and the bottom end of the push rod corresponds to the upper surface of the upper outer die core (220).

9. The negative angle one-shot forming die of a progressive die according to claim 1, wherein: the lower elastic connecting piece (430) in a natural state ejects the lower inner die core (410) in the lower die holder (3), and the upper surface of the ejected lower inner die core (410) is higher than the upper surface of the lower outer die core (420).

10. The negative angle one-shot forming die of a progressive die according to claim 1, wherein: the lower elastic connecting piece (430) comprises an ejection support and an elastic ejection mechanism arranged at the bottom end of the ejection support, and the ejection support penetrates through the lower die holder (3) and is connected with the lower inner die core (410).

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