CN219648445U - Bending structure for bending negative angle of die - Google Patents

Abstract

The utility model provides a bending structure for a die negative angle, wherein a lower die holder is provided with a fixing seat, a groove is formed in the inner side of the fixing seat, a concave die is accommodated in the groove, a circular arc-shaped cavity is formed in the concave die, a rotary concave die insert is arranged in the cavity, a jacking pin is arranged below the rotary concave die insert and vertically penetrates through the fixing seat, the lower end of the jacking pin is movably connected with the upper end of an upper die holder through a rectangular spring, a spring seat is arranged below the lower die holder, the lower die holder is connected with a pressing plate through a nitrogen spring, the upper end of the pressing plate carries a product, bending punches are arranged on two sides of the lower part of the upper die holder, and the bending punches are in sliding connection with an inclined plane of an upper base plate; according to the utility model, a fixed and vertical punching mode of a punch in the prior art is improved to a structure that the punch can rotate in a die insert, the plate is rotated and bent, and the angle difference of the product can be adjusted according to the rotation quantity; the design has low cost, labor saving and small occupied space.

Description

Bending structure for bending negative angle of die

Technical Field

The utility model relates to the field of bending dies, in particular to a bending structure for a negative bending angle of a die.

Background

The traditional bending die mainly comprises a punch, a pressing plate, a spring, a female die and a leaning root, wherein the stamping mode is vertical stamping, the mechanism mode is only suitable for being used when the product angle is more than or equal to 90 degrees, if the product angle is less than 90 degrees (such as 89 degrees, 85 degrees and 80 degrees), a side forming process is required to be added, the punch is downwards changed into a left-right pushing force, and the required angle of the product is achieved by utilizing a sliding block side pushing mode.

Adding side forming steps increases die cost, increases design difficulty, and has more drawbacks in terms of structure, such as: the occupied space is large, the cost is high, the processing difficulty is large, and the debugging is inconvenient.

Disclosure of Invention

The utility model aims to provide a bending structure for a die bending negative angle, which is small in occupied space, flexible and practical.

In order to achieve the above object, the technical scheme of the present utility model is as follows:

the bending structure for the die negative angle is characterized by comprising an upper die holder and a lower die holder, wherein an annular die groove is formed in the center of the upper end of the lower die holder, a first fixing seat and a second fixing seat are symmetrically arranged in the die groove in a left-right mode, a first groove and a second groove are respectively formed in the inner sides of the first fixing seat and the second fixing seat, a first female die and a second female die are respectively accommodated in the first groove and the second groove, circular arc-shaped cavities are formed in the inner sides of the first female die and the second female die, a first rotary female die insert and a second rotary female die insert are arranged in the cavities, a jacking pin is arranged below the first rotary female die insert and the second rotary female die insert, the jacking pin vertically penetrates through the first fixing seat and the second fixing seat, the lower end of the jacking pin is movably connected with the upper end of the upper die holder through a rectangular spring,

the lower die holder is characterized in that a spring seat is fixedly arranged below the center of the lower die holder, a pressing plate is arranged above the spring seat, the lower die holder is connected with the pressing plate through a nitrogen spring, the upper end of the pressing plate is used for carrying a product, an upper base plate is fixedly arranged below the upper die holder, a pair of bending punches are arranged on the left side and the right side of the lower portion of the upper base plate, the bending punches are in inclined surface sliding connection with the upper base plate, and the bending punches press the product to the openings of the first rotary die insert and the second rotary die insert so as to bend the product.

Further, an upper supporting plate is arranged above the upper die holder, and the upper supporting plate and the upper die holder are supported by upper foot pads.

Further, a lower supporting plate is arranged below the lower die holder, and the lower supporting plate and the lower die holder are supported by lower foot pads.

Further, upper die fixing seats are arranged on the left side and the right side of the upper die base, and lower die fixing seats are arranged on the left side and the right side of the lower die base.

Further, slide rails are further arranged on the left side and the right side of the lower die base, the slide rails are located on the outer sides of the lower die fixing base, and the outer sides of the upper die fixing base are in vertical sliding connection with the slide rails.

Further, the lower die fixing seat is provided with a guide block along the transverse protrusion, and the sliding rail is fixedly connected with the lower die fixing seat through the guide block.

Further, a positioning needle is arranged in the center of the pressing plate in a protruding mode, and the positioning needle penetrates through the pressing plate up and down to position a product.

According to the utility model, a fixed and vertical punching mode of a punch in the prior art is improved to a structure that the punch can rotate in a die insert, the plate is rotated and bent, and the angle difference of the product can be adjusted according to the rotation quantity; the utility model has low cost, labor saving, small occupied space, flexibility, practicability and convenient debugging.

Drawings

FIG. 1 is a closed-mode state diagram of the present utility model;

fig. 2 is a state diagram of the mold opening of the present utility model.

Reference numerals:

1 upper supporting plate, 2 upper foot pad, 3 upper die fixing seat, 4 first fixing seat, 5 first female die,

6 guide blocks, 7 lower die fixing seats, 8 lower die holders, 9 lower foot pads, 10 lower supporting plates,

11 a first rotary die insert, 12 a spring seat, 13 a nitrogen spring, 14 a rectangular spring, 15 a pressing plate,

16 positioning needles, 17 second rotary die inserts, 18 ejector pins, 19 second fixing seats, 20 second dies,

21 bending punch, 22 upper backing plate, 23 slide rail, 24 product, 25 upper die holder.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model discloses a bending structure for a die negative angle, which comprises an upper die holder 25 and a lower die holder 8, wherein an annular die groove is formed in the center of the upper end of the lower die holder 8, a first fixing seat 4 and a second fixing seat 19 are symmetrically arranged in the die groove in a left-right mode, a first groove and a second groove are respectively formed in the inner sides of the first fixing seat 4 and the second fixing seat 19, a first female die 5 and a second female die 20 are respectively accommodated in the first groove and the second groove, circular arc-shaped cavities are respectively formed in the inner sides of the first female die 5 and the second female die 20, a first rotary female die insert 11 and a second rotary female die insert 17 are respectively arranged in the cavities, and the first rotary female die insert 11 and the second rotary female die insert 17 can rotate in the semicircular arc-shaped cavities.

The lower die holder 8 is fixed to be equipped with spring holder 12 in the below at the central authorities, and the top of spring holder 12 is equipped with pressure flitch 15, and die holder 8 passes through nitrogen spring 13 with pressure flitch 15 to be connected, and pressure flitch 15's upper end carries product 24, and pressure flitch 15's central authorities protrusion is equipped with positioning needle 16, and positioning needle 16 runs through from top to bottom and positions product 24, and product 24's fixed mode adopts both sides clamp plate, rotatory die four-point quick match (4 PCS) mode.

An upper base plate 22 is fixedly arranged below the upper die seat 25, a pair of bending punches 21 are arranged on the left side and the right side of the lower portion of the upper base plate 22, the bending punches 21 are in inclined sliding connection with the upper base plate 22, and the bending punches 21 press the product 24 to the openings of the first rotary die insert 11 and the second rotary die insert 17 so as to bend the product 24.

The left and right sides of upper die holder 25 is equipped with mould fixing base 3, and the left and right sides of die holder 8 is equipped with lower mould fixing base 7, and the left and right sides of die holder 8 still is equipped with slide rail 23, and slide rail 23 is located the outside of lower mould fixing base 7, and the outside of upper mould fixing base 3 is equipped with guide block 6 along horizontal protrusion along vertical sliding connection with slide rail 23, and lower mould fixing base 7, slide rail 23 pass through guide block 6 and lower mould fixing base 7 fixed connection, realize lift die sinking die closing through the sliding connection of upper mould fixing base 3 and slide rail 23.

The ejector pin 18 is arranged below the first rotary die insert 11 and the second rotary die insert 17, the ejector pin 18 vertically penetrates through the first fixed seat 4 and the second fixed seat 19, the lower end of the ejector pin 18 is movably connected with the upper end of the upper die holder 25 through the rectangular spring 14, and the ejector pin 18 applies a force to the bending punch 21 in a die opening state, so that the first rotary die insert 11 and the second rotary die insert 17 are outwards stretched, two inserts are prevented from being damaged during production, and meanwhile stripping is facilitated; at this time, the force of vertical punching is changed into the force of inward extrusion, so that the product 24 meets the angle requirement required by the drawing, and when the bending angle of the product 24 is found to be bad, the angles of the first rotary die insert 11 and the second rotary die insert 17 are rotated, or the height of the pressing plate 15 is adjusted, or the rotating angle is changed according to the rebound quantity of the product 24.

The upper support plate 1 is arranged above the upper die holder 25, the upper support plate 1 and the upper die holder 25 are supported by the upper pad 2, the lower support plate 10 is arranged below the lower die holder 8, and the lower support plate 10 is placed on a workbench surface when in use, and the lower support plate 10 and the lower die holder 8 are supported by the lower pad 9.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (7)

1. The utility model provides a bending structure for a die negative angle, which is characterized by comprising an upper die holder (25) and a lower die holder (8), the center of lower die holder (8) upper end is equipped with annular mould groove, mould inslot bilateral symmetry is equipped with first fixing base (4) and second fixing base (19), the inboard of first fixing base (4) and second fixing base (19) is equipped with first recess and second recess respectively, hold first die (5) and second die (20) in first recess and the second recess respectively, the inboard of first die (5) and second die (20) is equipped with convex die cavity, be equipped with first rotatory die mold insert (11) and second rotatory die mold insert (17) in the die cavity, the below of first rotatory die mold insert (11) and second rotatory die mold insert (17) is equipped with liftout pin (18), liftout pin (18) vertically runs through first fixing base (4) and second fixing base (19), the lower extreme of liftout pin (18) and upper end rectangle die holder (25) are passed through spring (14) and are connected movably,

the die comprises a die holder (8), and is characterized in that a spring seat (12) is fixedly arranged below the center of the die holder (8), a pressing plate (15) is arranged above the spring seat (12), the die holder (8) is connected with the pressing plate (15) through a nitrogen spring (13), the upper end of the pressing plate (15) is used for bearing a product (24), an upper base plate (22) is fixedly arranged below the upper base plate (25), a pair of bending punches (21) are arranged on the left side and the right side of the lower portion of the upper base plate (22), inclined planes are formed between the bending punches (21) and the upper base plate (22) in a sliding mode, and the bending punches (21) press the product (24) to the openings of the first rotary die insert (11) and the second rotary die insert (17) so as to bend the product (24).

2. The bending structure for the die negative angle according to claim 1, wherein an upper supporting plate (1) is arranged above the upper die holder (25), and the upper supporting plate (1) and the upper die holder (25) are supported by upper cushion legs (2).

3. The bending structure for the die negative angle according to claim 1, wherein a lower supporting plate (10) is arranged below the lower die holder (8), and the lower supporting plate (10) and the lower die holder (8) are supported by a lower pad leg (9).

4. The bending structure for the die negative angle according to claim 1, wherein the left and right sides of the upper die holder (25) are provided with upper die fixing bases (3), and the left and right sides of the lower die holder (8) are provided with lower die fixing bases (7).

5. The bending structure for the die negative angle according to claim 4, wherein sliding rails (23) are further arranged on the left side and the right side of the lower die holder (8), the sliding rails (23) are located on the outer side of the lower die fixing seat (7), and the outer side of the upper die fixing seat (3) is in vertical sliding connection with the sliding rails (23).

6. The bending structure for the die negative angle according to claim 5, wherein the lower die fixing seat (7) is provided with a guide block (6) along a transverse bulge, and the sliding rail (23) is fixedly connected with the lower die fixing seat (7) through the guide block (6).

7. The bending structure for the die negative angle according to claim 1, wherein a positioning needle (16) is convexly arranged at the center of the pressing plate (15), and the positioning needle (16) penetrates up and down and positions a product (24).