CN214719910U - Stamping and bending die - Google Patents

Abstract

The utility model discloses a stamping bending die, which relates to the field of stamping dies and comprises a die fixing plate arranged on a lower die holder, a die is arranged on the die fixing plate, a sliding top plate is arranged in the die, and a reset elastic part is arranged between the top plate and the die fixing plate; an eccentric round hole is formed in the round corner of the female die, a matched cylindrical pin is arranged in the eccentric round hole, and the cylindrical pin is arranged in the eccentric round hole in a rolling manner; the top of the female die fixing plate is connected with a limiting block, and the limiting block is detachably connected with the top plate. The utility model has the advantages that the die clearance is equal to the material thickness of a bending piece to be pressed through the eccentric round hole at the round angle part of the concave die and the cylindrical pin in the eccentric round hole; and the metal plate material is tangent to the cylindrical pin, the metal plate material can roll along the cylindrical pin in the concave die, the outer surface of the bending part to be pressed is hardly abraded, the structure is simple, and the use is convenient.

Description

Stamping and bending die

Technical Field

The utility model relates to a stamping die field, concretely relates to punching press bending die.

Background

At present, stamping is a processing method for obtaining a desired part shape by applying pressure to a raw material using a stamping die mounted on a press machine under normal temperature conditions to cause separation or plastic deformation of the raw material. The bending part is one of the stamping parts with the largest number in the manufacturing of modern industrial products, automobiles, electric appliances, instruments and tools, and the most main technical difficulty of stamping and bending (bending lines are straight lines) is to overcome springback. At the present stage, the measures for solving the springback through the mould structure mainly comprise: compensation method, convex mould making projection, correcting bending and the like. Yet another approach is to reduce spring back by reducing the die gap, which can cause wear on the outer surface of the stamped part, with existing bending die gaps being greater than one material thickness, which is detrimental to spring back, and wear being greater if the die gap is smaller.

Disclosure of Invention

The utility model provides an above-mentioned problem, provide a punching press bending die, solved how to overcome punching press bending member resilience, reduced the problem of punching press bending member surface wear and tear.

The utility model adopts the technical proposal that: a stamping and bending die comprises a female die, a male die, a lower die holder, a female die fixing plate, a top plate, a cylindrical pin and a limiting block; a female die fixing plate is arranged on the lower die holder, a female die is arranged on the female die fixing plate, a sliding top plate is arranged in the female die, and a reset elastic part is arranged between the top plate and the female die fixing plate;

an eccentric round hole is formed in the round corner of the female die, a matched cylindrical pin is arranged in the eccentric round hole, and the cylindrical pin is arranged in the eccentric round hole in a rolling manner;

the die fixing plate top is connected with the stopper, the stopper can be dismantled with the roof and be connected.

Furthermore, the sum of the length dimension of the reset elastic part in a natural state and the height dimension of the top plate is higher than the thickness dimension of one bending part to be pressed at the top of the female die.

Furthermore, the length dimension of the male die with the similar cylindrical pin pitch is the same as the thickness dimension of the bending piece to be pressed.

Furthermore, slide bars are arranged at four corners of the top plate, slide rails matched with the slide bars are arranged on the lower die holder and the female die fixing plate, and the slide bars are arranged in the slide rails in a sliding connection mode.

Further, the return elastic member is a spring.

The utility model has the advantages that:

the utility model provides a stamping bending die, which is characterized in that a resetting elastic piece is matched with a top plate, and the top plate is lifted under the action of the resetting elastic piece, so that a bending piece to be pressed is placed on the top plate, and the bending piece to be pressed can be stably placed; through the eccentric round hole at the round corner of the female die and the cylindrical pin in the eccentric round hole, the clearance of the die is equal to the material thickness of a bending part to be pressed; the metal plate material is tangent to the cylindrical pin, the metal plate material can roll along the cylindrical pin in the concave die, and the outer surface of the bending part to be pressed is hardly abraded; the top plate is matched with the limiting block to generate correction bending; the utility model has simple structure and convenient use, so that the die clearance is equal to the material thickness of a bending piece to be pressed, and the springback is reduced; the outer surface of the bending member to be pressed is hardly worn.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of the installation of the cylindrical pin of the present invention.

Reference numerals:

1-lower die holder, 2-female die fixing plate, 3-female die, 4-top plate, 5-cylindrical pin, 6-male die, 7-limiting block and 8-bending piece to be pressed.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1 to 2, the stamping and bending die comprises a female die 3, a male die 6, a lower die holder 1, a female die fixing plate 2, a top plate 4, a cylindrical pin 5 and a limiting block 7;

a female die fixing plate 2 is arranged on the lower die holder 1, the female die fixing plate 2 and the lower die holder 1 are positioned by pins and connected through screws, a female die 3 is arranged on the female die fixing plate 2, the female die 3 is embedded in the female die fixing plate 2 and connected through screws, a sliding top plate 4 is arranged in the female die 3, the top plate 4 can move along with a male die 6, and a reset elastic part is arranged between the top plate 4 and the female die fixing plate 2; preferably, the reset elastic part is a spring, when the die is not used, the top plate 4 is lifted to reset, and the sum of the length dimension of the reset elastic part in a natural state and the height dimension of the top plate 4 is higher than the thickness dimension of a bending part 8 to be pressed at the top of the female die 3; the bending piece 8 to be pressed is placed on the top plate 4, so that the bending piece 8 to be pressed can be stably placed;

an eccentric round hole is formed in the round corner of the female die 3, a matched cylindrical pin 5 is arranged in the eccentric round hole, and the cylindrical pin 5 is arranged in the eccentric round hole in a rolling manner; the length of the cylindrical pin 5 from the male die 6 with similar distance is the same as the thickness of the bending part 8 to be pressed; the cylindrical pin 5 is a real concave die at the moment, so the die clearance is equal to the thickness of a to-be-pressed bent part 8, bending deformation is generated, the to-be-pressed bent part 8 is a plate material, a metal plate material enters the concave die 3 along the cylindrical pin 5, the metal plate material and the cylindrical pin 5 are tangent, the installation position of the concave die 3 and the position of an eccentric circular hole are determined according to the external dimension of the to-be-pressed bent part 8, and the metal plate material is ensured to be tangent to the cylindrical pin 5; the eccentric round hole can make the metal plate material only contact with the cylindric lock 5, do not contact with die 3, and the mould clearance is equivalent to one and waits to press 8 material thickness of crooked spare like this, and the distance of cylindric lock 5 tangential point and terrace die 6 equals one and waits to press 8 material thickness of crooked spare, but the distance of die 3 and terrace die 6 equals about 1.1 material thickness, consequently, has both reduced the resilience and has reduced the friction.

The top of the female die fixing plate 2 is connected with a limiting block 7, the limiting block 7 is embedded in the female die fixing plate 2 and is connected with the top plate 4 through screws, the limiting block 7 is detachably connected with the top plate 4 to limit the movement range of the top plate 4, and when the limiting block 7 is in contact with the top plate 4, the top plate 4 stops.

The utility model provides a punching bending die, during the die sinking, terrace die 6 is carried up by the terrace die casting die for use, roof 4 is raised under the effect of spring, roof 4 upper surface is higher than about a thickness dimension of waiting to press bending member 8 of die 3 upper surface, if the metal plate material thickness of waiting to press bending member 8 is 2mm, then roof 4 upper surface is higher than about 2mm of die 3 upper surface, the metal plate material is placed on roof 4, can use the pin to fix a position, terrace die 6 descends, terrace die 6 contacts the metal plate material earlier, continue descending, the spring is compressed, the metal plate material is compressed tightly by terrace die 6 and roof 4; continuing to descend, the sheet metal material can roll along the cylindrical pin 5 in the concave die 3, and the cylindrical pin 5 is the true concave die at the moment, so that the die clearance is equal to the material thickness of a bending piece 8 to be pressed, and bending deformation is generated; the male die 6 continues to move downwards, the sheet metal enters the female die 3, the bending angle is changed into 90 degrees until the lower surface of the top plate 4 collides with the limiting block 7 to generate correction bending, the die is closed, and the bending is finished after the lower surface of the top plate 4 collides with the limiting block 7 to obtain a U-shaped bent stamping part; and (4) returning the male die 6, and taking the U-shaped bent stamping part down from the female die 3.

In an embodiment of the utility model, four corners of the top plate 4 are provided with slide bars, the lower die holder 1 and the die fixing plate 2 are both provided with slide ways matched with the slide bars, and the slide bars are arranged in the slide ways in a sliding way, so that the top plate 4 can only move downwards when being pressed by the male die 6 and can only move upwards when being loosened, thereby ensuring that the top plate 4 does not move during the up-and-down movement; during the downward movement of the male die 6, the spring is compressed all the time and the slide moves downwards in the slide with the top plate 4.

The utility model provides a stamping bending die, through the cooperation of a reset elastic part and a top plate, the top plate 4 is lifted under the action of the reset elastic part, so that a bending part 8 to be pressed is placed on the top plate 4, and the stable placement of the bending part 8 to be pressed is ensured; through the eccentric round hole at the round angle of the female die 3 and the cylindrical pin 5 in the eccentric round hole, the die gap is equal to the material thickness of a bending piece 8 to be pressed; the metal plate material is tangent to the cylindrical pin 5, the metal plate material can roll along the cylindrical pin 5 in the concave die 3, and the outer surface of the bending piece 8 to be pressed is hardly abraded; the top plate 4 is matched with the limiting block 7 to generate correction bending; the utility model has simple structure and convenient use, so that the die clearance is equal to the material thickness of a bending piece 8 to be pressed, and the springback is reduced; the outer surface of the bending member 8 to be pressed is hardly worn.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (5)

1. A stamping and bending die comprises a female die (3) and a male die (6), and is characterized by further comprising a lower die holder (1), a female die fixing plate (2), a top plate (4), a cylindrical pin (5) and a limiting block (7); a female die fixing plate (2) is arranged on the lower die holder (1), a female die (3) is arranged on the female die fixing plate (2), a sliding top plate (4) is arranged in the female die (3), and a reset elastic part is arranged between the top plate (4) and the female die fixing plate (2);

an eccentric round hole is formed in the round corner of the female die (3), a matched cylindrical pin (5) is arranged in the eccentric round hole, and the cylindrical pin (5) is arranged in the eccentric round hole in a rolling manner;

the die fixing plate (2) is connected with a limiting block (7) at the top, and the limiting block (7) is detachably connected with the top plate (4).

2. The press-bending die according to claim 1, wherein the sum of the length dimension of the return spring in its natural state and the height dimension of the top plate (4) is higher than the thickness dimension of a bending element (8) to be pressed at the top of the female die (3).

3. The press-bending die according to claim 1, characterised in that the length dimension of the cylindrical pin (5) from the adjacent male die (6) is the same as the thickness dimension of the bent piece (8) to be pressed.

4. The stamping and bending die according to claim 1, wherein slide bars are arranged at four corners of the top plate (4), slide ways matched with the slide bars are arranged on the lower die holder (1) and the female die fixing plate (2), and the slide bars are arranged in the slide ways in a sliding connection manner.

5. The press bending die of claim 1, wherein the return spring is a spring.

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