CN217474632U - Negative angle bending hardware stamping die - Google Patents

Abstract

The utility model relates to the technical field of hardware stamping, specifically disclose a negative angle bending's hardware stamping die, be provided with down between fixed block and the sliding block and take off the board, the lower extreme that takes off the board down is connected with first elasticity reset assembly, be provided with first bending angle on the fixed block near one side upper end that takes off the board down, be provided with the second bending angle on the sliding block near one side upper end that takes off the board down; the first bending swing block is in a straightening state under the action of upward jacking of the first lower die ejector pin assembly in the bending process along the first bending angle, and the second bending swing block is in a straightening state under the action of upward jacking of the second lower die ejector pin assembly in the bending process along the second bending angle; the utility model is suitable for a metal product's that hem size is big, the material is thick and the surface requires height stamping forming, can realize the one-time shaping operation that the negative angle was bent, reduce the quantity and the expense of mould development, improve mould life.

Description

Negative angle bending hardware stamping die

Technical Field

The utility model relates to a hardware punching press technical field especially relates to a hardware stamping die that negative angle was bent.

Background

The blank pressing characteristic is universally existed in product parts of communication, new energy, electronics and optics, and the requirements of part strength, function or assembly are met.

As shown in fig. 1 and 2, a common operation mold structure is shown, it can be known from the figure that a bending punch 16 is installed in a diagonal rail groove of an upper mold stripper plate, in a mold descending process, the bending punch moves obliquely downward under the pressure of an upper base plate, a lower mold of the mold is installed on a lower mold plate, the lower mold moves obliquely by means of a diagonal rail to play a role of stripping after bending is completed, a material thickness gap value is kept between the bending lower mold and the bending punch for matching a negative angle, and in a bending process of the bending punch 16, a non-working surface on the back side needs to be limited by a stopper, so that the bending punch is prevented from being deformed by force, and the stability of a bending gap is ensured. For example, analysis on the size and the thickness of a product shows that the mold structure is only suitable for products with small folded edges and thin material thickness, and if the folded edge size of the product is large and the material thickness is more than 3MM, the mold opening by adopting the structure has the fatal problems of high mold cost, short service life and the like.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned mould structure that exists only be fit for the product that the hem is little and thickness is thin, lead to mould with high costs and short-lived scheduling problem, the utility model provides a hardware stamping die that negative angle was bent is applicable to the stamping forming of the metal product that the hem size is big, the material is thick and the surface requires height, can realize the one-time shaping operation that the negative angle was bent, reduces the quantity and the expense of mould development, improves mould life.

In order to solve the technical problem, the utility model provides a concrete scheme as follows:

a negative angle bending hardware stamping die comprises an upper die unit and a lower die unit arranged below the upper die unit;

the upper die unit is provided with a first bending swing block and a second bending swing block, the first bending swing block and the second bending swing block are arranged adjacently, and the first bending swing block and the second bending swing block are rotatably arranged;

a slotting tool is arranged on one side of the second bending swing block;

the lower die unit is provided with a fixed block corresponding to the first bending swing block and a sliding block corresponding to the second bending swing block, the fixed block is provided with a first lower die ejector pin assembly, and the sliding block is provided with a second lower die ejector pin assembly;

the upper end of one side of the sliding block, which is far away from the fixed block, is provided with a slot corresponding to the slotting tool, and the sliding block moves towards the fixed block under the action of the slotting tool;

a lower stripping plate is arranged between the fixed block and the sliding block, the lower end of the lower stripping plate is connected with a first elastic reset assembly, a first bending angle is arranged at the upper end of one side, close to the lower stripping plate, of the fixed block, and a second bending angle is arranged at the upper end of one side, close to the lower stripping plate, of the sliding block;

the first bending swing block is presented as a correcting state under the upward jacking action of the first lower die ejector pin assembly in the bending process along the first bending angle, and the second bending swing block is presented as a correcting state under the upward jacking action of the second lower die ejector pin assembly in the bending process along the second bending angle.

Optionally, the upper die unit is further provided with a first upper die ejector pin assembly located at the upper end of the first bending swing block and a second upper die ejector pin assembly located at the upper end of the second bending swing block, and before bending operation, the first bending swing block and the second bending swing block are subjected to downward ejecting acting force through the first upper die ejector pin assembly and the second upper die ejector pin assembly, so that the first bending swing block and the second bending swing block are ensured to be in a non-righting state, and the next bending operation is performed conveniently.

Optionally, the lower extreme of slotting tool is provided with first inclined plane, be provided with on the slot with first inclined plane assorted second inclined plane, one side that the fixed block was kept away from to the sliding block is provided with the dog, install second elasticity reset assembly on the dog, second elasticity reset assembly connects the sliding block, and the sliding block can move to the fixed block direction under the effect of slotting tool, makes its second bend the angle and the cooperation of second pendulum piece of bending, accomplishes the operation of bending to the product, treats the slotting tool and the sliding block breaks away from the back, and the sliding block can resume to initial operating condition under the effect of second elasticity reset assembly to in the operation of bending next time.

Optionally, the second elastic component that resets includes the flexible liftout pole of second reset spring and second, the sliding block is connected to the one end of the flexible liftout pole of second, and the second reset spring is connected to the other end of the flexible liftout pole of second, and the flexible liftout pole of second stretches out to the fixed block direction along with the sliding block under the slotting tool effect, and when the slotting tool effort disappeared, the flexible liftout pole of second contracts under the effect of second reset spring, resumes to initial operating condition to in the operation of bending next time of being convenient for.

Optionally, the tip of first angle of bending is provided with first gyro wheel, the tip of the angle of bending is provided with the second gyro wheel to the second, sets up first gyro wheel and second gyro wheel, and the sliding friction between angle of bending and the material is rolled friction into with first bender, second, has effectively reduced at the material in-process of bending, and the scaling, indentation, scraping flower, the superficial layer that cause the material friction peel off, have guaranteed the product quality.

Optionally, the upper die unit includes an upper die base, an upper clamp plate, an upper base plate, and a side baffle, the lower end of the upper die base is connected to the upper end of the upper clamp plate, the lower end of the upper clamp plate is connected to the upper end of the upper base plate, and the lower end of the upper base plate is connected to the upper end of the side baffle;

the first bending swing block and the second bending swing block are rotatably arranged on the side baffle, so that the first bending swing block and the second bending swing block can be installed in a swinging mode, and meanwhile the first bending swing block and the second bending swing block can be conveniently straightened.

Optionally, the lower die unit comprises a lower cushion plate and a lower die base, and the lower end of the lower cushion plate is connected with the upper end of the lower die base;

fixed block and sliding block are installed on the lower bolster, first elasticity reset assembly embedding is installed between lower bolster and die holder, improves first elasticity reset assembly's installation stability, and then improves the stability of the whole operation of bending.

Optionally, the first elastic resetting assembly includes a first resetting spring and first telescopic ejector rods located at two sides of the first resetting spring;

the lower end of the first reset spring and the lower end of the first telescopic ejector rod are fixed on the lower die base, the upper end of the first reset spring and the upper end of the first telescopic ejector rod are abutted to the lower end of the lower stripping plate, so that the lower stripping plate can be jacked upwards under the action of the first reset spring and the first telescopic ejector rod, and the automatic stripping of products is realized.

Optionally, the upper die unit is provided with a guide post, the lower die unit is provided with a guide groove matched with the guide post, the alignment accuracy of the upper die unit and the lower die unit is improved, and the accuracy of operation is improved.

Optionally, the first lower die ejector pin assembly comprises a first ejector elastic member and a first ejector pin connected with the first ejector elastic member;

the second lower die ejection pin assembly comprises a second ejection elastic part and a second ejection pin connected with the second ejection elastic part, the first bending swing block is upwards ejected under the action of the first ejection elastic part by the first ejection pin to assist the first bending swing block to be separated from a product, and the second bending swing block is upwards ejected under the action of the second ejection elastic part by the second ejection pin to assist the second bending swing block to be separated from the product.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a pair of hardware stamping die that negative angle was bent is applicable to the stamping forming of the metal product that the hem size is big, the material is thick and the surface requires height, can realize the one-time shaping operation that the negative angle was bent, reduces the quantity and the expense of mould development, improves mould life.

Drawings

FIG. 1 and FIG. 2 are schematic structural diagrams of a bending mold in the background art;

fig. 3 is a schematic view of a die opening state of a negative-angle bending hardware stamping die provided in an embodiment of the present invention;

fig. 4 is a schematic view of a die assembly state of a negative-angle bending hardware stamping die provided in an embodiment of the present invention;

fig. 5 is a schematic structural view of an upper die unit provided in an embodiment of the present invention;

fig. 6 is a schematic structural view of a lower die unit provided in an embodiment of the present invention;

wherein, 1 is an upper die unit; 101 is an upper die holder; 102 is an upper splint; 103 is an upper backing plate; 104 is a side baffle; 105 is a guide post; 2 is a lower die unit; 21 is a lower backing plate; 22 is a lower die holder; 23 is a guide groove; 3 is a first bending swing block; 4 is a second bending swing block; 5 is a slotting tool; 6, a fixed block; 61 is a first folding angle; 7 is a sliding block; 71 is a slot; 72 is a second folding angle; 8 is a first lower die lifter pin assembly; 81 is a first ejection elastic part; 82 is a first ejector pin; 9 is a second lower die lifter pin assembly; 91 is a second ejector elastic piece; a second ejector pin 92; 10 is a lower stripper plate; 11 is a first elastic reset component; 111 is a first return spring; 112 is a first telescopic ejector rod; 12 is a first upper die ejector pin assembly; a second upper die lifter pin assembly 13; 14 is a stop block; 15 is a second elastic reset component; 151 is a second return spring; 152 is a second telescopic ejector pin; and 16 is a bending punch.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention will be combined to clearly and completely describe the technical solutions of the embodiments of the present invention. The described embodiments are some, but not all embodiments of the invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

For example, the negative-angle bending hardware stamping die comprises an upper die unit and a lower die unit arranged below the upper die unit; the upper die unit is provided with a first bending swing block and a second bending swing block, the first bending swing block and the second bending swing block are arranged adjacently, and the first bending swing block and the second bending swing block are rotatably arranged; a slotting tool is arranged on one side of the second bending swing block; the lower die unit is provided with a fixed block corresponding to the first bending swing block and a sliding block corresponding to the second bending swing block, the fixed block is provided with a first lower die ejector pin assembly, and the sliding block is provided with a second lower die ejector pin assembly; the upper end of one side of the sliding block, which is far away from the fixed block, is provided with a slot corresponding to the slotting tool, and the sliding block moves towards the fixed block under the action of the slotting tool; a lower stripping plate is arranged between the fixed block and the sliding block, the lower end of the lower stripping plate is connected with a first elastic reset assembly, a first bending angle is arranged at the upper end of one side, close to the lower stripping plate, of the fixed block, and a second bending angle is arranged at the upper end of one side, close to the lower stripping plate, of the sliding block; the first bending swing block is presented as a correcting state under the upward jacking action of the first lower die ejector pin assembly in the bending process along the first bending angle, and the second bending swing block is presented as a correcting state under the upward jacking action of the second lower die ejector pin assembly in the bending process along the second bending angle.

The negative angle bending hardware stamping die provided by the embodiment is suitable for stamping and forming metal products with large folding edge size, thick materials and high surface requirements, can realize one-time forming operation of negative angle bending, reduces the quantity and cost of die development, and prolongs the service life of the die.

The first embodiment is as follows:

as shown in fig. 3-6, the negative-angle bending hardware stamping die comprises an upper die unit 1 and a lower die unit 2 arranged below the upper die unit 1, wherein a product is placed on the lower die unit 2, the upper die unit 1 moves downwards under the driving of an external acting force until the product and the lower die unit 2 are in a die-closing state, and the negative-angle bending operation of the product is completed.

The upper die unit 1 is provided with a first bending swing block 3 and a second bending swing block 4, the first bending swing block 3 and the second bending swing block 4 are arranged adjacently, namely, the negative angle bending operation of two sides of a product is completed simultaneously, the first bending swing block 3 and the second bending swing block 4 are installed in a rotatable mode, specifically, a rotating shaft can be arranged on the first bending swing block 3 in a penetrating mode, the rotating shaft is arranged on the second bending swing block 4 in a penetrating mode, the first bending swing block 3 and the second bending swing block 4 can swing or swing under the driving of external acting force by means of the rotating shaft, an inserting knife 5 is arranged on one side of the second bending swing block 4, and the inserting knife 5 is used for being matched with components on the lower die unit 2.

Specifically, the lower die unit 2 is provided with a fixed block 6 corresponding to the first bending swing block 3 and a sliding block 7 corresponding to the second bending swing block 4, the fixed block 6 is provided with a first lower die ejector pin component 8, the first lower die ejector pin component 8 is used for generating upward ejection acting force on the first bending swing block 3, the sliding block 7 is provided with a second lower die ejector pin component 9, and the second lower die ejector pin component 9 is used for generating upward ejection acting force on the second bending swing block 4.

The upper end of one side of the sliding block 7, which is far away from the fixed block 6, is provided with a slot 71 corresponding to the slotting tool 5, the sliding block 7 moves towards the fixed block 6 under the action of the slotting tool 5, the slotting tool 5 moves downwards under the driving action of the upper die unit 1, and the sliding block 7 is driven to move towards the direction of the fixed block 6 after being contacted with the sliding block 7.

A lower stripping plate 10 is arranged between a fixed block 6 and a sliding block 7, the lower end of the lower stripping plate 10 is connected with a first elastic resetting component 11, in the operation process, a product is placed on the lower stripping plate 10, when an upper die unit 1 and a lower die unit 2 are in a die assembly state, the lower stripping plate 10 drives the first elastic resetting component 11 to move downwards, and a slotting tool 5 enables the sliding block 7 to move towards the fixed block 6, namely, in the initial operation stage, the gap between the sliding block 7 and the lower stripping plate 10 is large, and in the gradual die assembly process of the upper die unit 1 and the lower die unit 2, the gap between the sliding block 7 and the lower stripping plate 10 is gradually reduced until the sliding block is matched with a second bending swinging block 4, so that the product is bent.

Be close to down on fixed block 6 and take off one side upper end of board 10 and be provided with first angle of bending 61, be close to down on sliding block 7 and take off one side upper end of board 10 and be provided with the second angle of bending 72, first pendulum piece 3 and the second pendulum piece 4 of bending are the structure of falling L shape, the lower extreme of first pendulum piece 3 of bending be provided with the first angle of bending 61 assorted angles of bending, the second is bent the lower extreme of pendulum piece 4 and is provided with the second angle of bending 72 assorted angles of bending.

In the initial operation stage, after a product is placed on the lower stripper plate 10, the upper die unit 1 drives the first bending swing block 3 and the second bending swing block 4 to move downwards, at this time, the first bending swing block 3 and the second bending swing block 4 are in a non-righting state, in the process that the upper die unit 1 continues to move downwards, the first bending swing block 3 bends the product along the first bending angle 61 until the product is in a righting state under the upward jacking action of the first lower die ejector pin assembly 8, the second bending swing block 4 bends the product along the second bending angle 72 until the product is in a righting state under the upward jacking action of the second lower die ejector pin assembly 9, and when the first bending swing block 3 and the second bending swing block 4 are in a righting state, the upper die unit 1 and the lower die unit 2 are also in a die closing state.

Example two:

referring to fig. 3 and 5, the upper die unit 1 is further provided with a first upper die lift pin assembly 12 located at an upper end of the first bending swing block 3, and a second upper die lift pin assembly 13 located at an upper end of the second bending swing block 4.

Before the bending operation, the first bending swing block 3 and the second bending swing block 4 are pushed downwards by the first upper die ejector pin component 12 and the second upper die ejector pin component 13, so that the first bending swing block 3 and the second bending swing block 4 are ensured to be in a non-righting state, and the next bending operation is convenient to perform.

The lower end of the slotting tool 5 is provided with a first inclined plane, the slot 71 is provided with a second inclined plane matched with the first inclined plane, one side of the sliding block 7, which is far away from the fixed block 6, is provided with a stop block 14, the stop block 14 is provided with a second elastic resetting component 15, and the second elastic resetting component 15 is connected with the sliding block 7.

The sliding block 7 can move towards the direction of the fixed block 6 under the action of the slotting tool 5, so that the second bending angle 72 of the sliding block is matched with the second bending swing block 4, the product is bent, after the slotting tool 5 is separated from the sliding block 7, the sliding block 7 can be restored to an initial operation state under the action of the second elastic resetting component 15, and the next bending operation can be conveniently carried out.

Specifically, the second elastic return assembly 15 includes a second return spring 151 and a second elastic return rod 152, one end of the second elastic return rod 152 is connected to the sliding block 7, the other end of the second elastic return rod 152 is connected to the second return spring 151, the second elastic return rod 152 is extended toward the fixed block 6 along with the sliding block 7 under the action of the slotting tool 5, and when the action force of the slotting tool 5 disappears, the second elastic return rod 152 is retracted under the action of the second return spring 151 to return to the initial operation state, so as to perform the next bending operation.

Example three:

the end part of the first bending angle 61 is provided with a first roller, the end part of the second bending angle 72 is provided with a second roller, the first roller and the second roller are arranged, sliding friction between the first bending angle 61, the second bending angle 72 and a material is converted into rolling friction, pressing damage, indentation, scraping and surface layer peeling caused by material friction in the material bending process are effectively reduced, and product quality is guaranteed.

Example four:

referring to fig. 3, the upper die unit 1 includes an upper die base 101, an upper clamp plate 102, an upper pad plate 103, and a side fence 104, wherein the lower end of the upper die base 101 is connected to the upper end of the upper clamp plate 102, the lower end of the upper clamp plate 102 is connected to the upper end of the upper pad plate 103, and the lower end of the upper pad plate 103 is connected to the upper end of the side fence 104; the first bent swing block 3 and the second bent swing block 4 are rotatably mounted on the side baffle 104, so that the first bent swing block 3 and the second bent swing block 4 can be mounted in a swinging mode, and meanwhile, the first bent swing block 3 and the second bent swing block 4 can be conveniently straightened.

Referring to fig. 4, the lower mold unit 2 includes a lower cushion plate 21 and a lower mold base 22, and a lower end of the lower cushion plate 21 is connected to an upper end of the lower mold base 22; fixed block 6 and sliding block 7 are installed on lower bolster 21, and first elasticity reset assembly 11 embedding is installed between lower bolster 21 and die holder 22, improves the installation stability of first elasticity reset assembly 11, and then improves the stability of whole operation of bending.

Specifically, the first elastic return assembly 11 includes a first return spring 111 and first telescopic ejector rods 112 located at two sides of the first return spring 111; on first reset spring 111's lower extreme and first flexible liftout pole 112's lower extreme all was fixed in die holder 22, first reset spring 111's upper end and first flexible liftout pole 112's upper end all with take off the lower extreme butt of board 10 down for take off board 10 down and can be at first reset spring 111 and first flexible liftout pole 112's effect down jack-up that makes progress, realize that the automation of product takes off the material.

Be provided with guide post 105 on last mould unit 1, be provided with on the lower mould unit 2 with guide post 105 assorted guide way 23, can improve the counterpoint accuracy of last mould unit 1 and lower mould unit 2, and then improve the accurate nature of operation.

Wherein the first lower die ejector pin assembly 8 comprises a first ejector spring 81 and a first ejector pin 82 connected to the first ejector spring 81; the second lower die ejector pin assembly 9 comprises a second ejector elastic part 91 and a second ejector pin 92 connected with the second ejector elastic part 91, the first ejector pin 82 jacks the first bent swing block 3 upwards under the action of the first ejector elastic part 81 to assist the first bent swing block 3 to be separated from a product, and the second ejector pin 92 jacks the second bent swing block 4 upwards under the action of the second ejector elastic part 91 to assist the second bent swing block 4 to be separated from the product.

To sum up, the utility model provides a pair of hardware stamping die that negative angle was bent is applicable to the stamping forming of the metal product that the hem size is big, the material is thick and the surface requires height, can realize the one-time shaping operation that the negative angle was bent, reduces the quantity and the expense of mould development, improves mould life.

It is to be understood that in the description of the present invention, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

Claims (10)

1. The negative-angle bending hardware stamping die is characterized by comprising an upper die unit (1) and a lower die unit (2) arranged below the upper die unit (1);

the upper die unit (1) is provided with a first bending swing block (3) and a second bending swing block (4), the first bending swing block (3) and the second bending swing block (4) are arranged adjacently, and the first bending swing block (3) and the second bending swing block (4) are rotatably arranged;

a slotting tool (5) is arranged on one side of the second bending swing block (4);

a fixed block (6) corresponding to the first bending swing block (3) and a sliding block (7) corresponding to the second bending swing block (4) are mounted on the lower die unit (2), a first lower die ejector pin assembly (8) is mounted on the fixed block (6), and a second lower die ejector pin assembly (9) is mounted on the sliding block (7);

the upper end of one side, far away from the fixed block (6), of the sliding block (7) is provided with a slot (71) corresponding to the slotting tool (5), and the sliding block (7) moves towards the fixed block (6) under the action of the slotting tool (5);

a lower stripping plate (10) is arranged between the fixed block (6) and the sliding block (7), the lower end of the lower stripping plate (10) is connected with a first elastic resetting component (11), the upper end of one side, close to the lower stripping plate (10), of the fixed block (6) is provided with a first folding angle (61), and the upper end of one side, close to the lower stripping plate (10), of the sliding block (7) is provided with a second folding angle (72);

first pendulum piece (3) of bending appear for just setting up the state under the effect of the jack-up that makes progress that receives first lower mould ejector pin subassembly (8) along first bent angle (61) in-process of bending, second pendulum piece (4) of bending appears for just setting up the state under the effect of the jack-up that makes progress that receives second lower mould ejector pin subassembly (9) along second bent angle (72) in-process of bending.

2. The stamping die for the negative-angle bending hardware according to claim 1, wherein a first upper die ejector pin assembly (12) located at the upper end of the first bending swing block (3) and a second upper die ejector pin assembly (13) located at the upper end of the second bending swing block (4) are further mounted on the upper die unit (1).

3. The negative-angle bending hardware stamping die according to claim 1, wherein a first inclined plane is arranged at the lower end of the slotting tool (5), a second inclined plane matched with the first inclined plane is arranged on the slot (71), a stop block (14) is arranged on one side, away from the fixed block (6), of the sliding block (7), a second elastic resetting component (15) is installed on the stop block (14), and the sliding block (7) is connected with the second elastic resetting component (15).

4. The stamping die for the negative-angle bending hardware piece as claimed in claim 3, wherein the second elastic reset assembly (15) comprises a second reset spring (151) and a second telescopic ejector rod (152), one end of the second telescopic ejector rod (152) is connected with the sliding block (7), and the other end of the second telescopic ejector rod (152) is connected with the second reset spring (151).

5. The negative-angle bending hardware stamping die according to claim 1, wherein the end of the first bending angle (61) is provided with a first roller, and the end of the second bending angle (72) is provided with a second roller.

6. The stamping die for the negative-angle bent hardware part according to claim 1, wherein the upper die unit (1) comprises an upper die holder (101), an upper clamping plate (102), an upper backing plate (103) and a side baffle (104), the lower end of the upper die holder (101) is connected with the upper end of the upper clamping plate (102), the lower end of the upper clamping plate (102) is connected with the upper end of the upper backing plate (103), and the lower end of the upper backing plate (103) is connected with the upper end of the side baffle (104);

the first bending swing block (3) and the second bending swing block (4) are rotatably arranged on the side baffle (104).

7. The stamping die for the negative-angle bent hardware piece is characterized in that the lower die unit (2) comprises a lower backing plate (21) and a lower die base (22), wherein the lower end of the lower backing plate (21) is connected with the upper end of the lower die base (22);

the fixed block (6) and the sliding block (7) are arranged on the lower backing plate (21), and the first elastic resetting component (11) is embedded between the lower backing plate (21) and the lower die base (22).

8. The stamping die for the negative-angle bent hardware piece as claimed in claim 7, wherein the first elastic return assembly (11) comprises a first return spring (111) and first telescopic ejector rods (112) positioned at two sides of the first return spring (111);

the lower end of the first return spring (111) and the lower end of the first telescopic ejector rod (112) are fixed on the lower die base (22), and the upper end of the first return spring (111) and the upper end of the first telescopic ejector rod (112) are abutted to the lower end of the lower stripping plate (10).

9. The negative-angle bending hardware stamping die according to claim 1, wherein a guide column (105) is arranged on the upper die unit (1), and a guide groove (23) matched with the guide column (105) is arranged on the lower die unit (2).

10. The stamping die for negative-angle bending hardware according to claim 1, wherein the first lower die ejector pin assembly (8) comprises a first ejector spring (81) and a first ejector pin (82) connected with the first ejector spring (81);

the second lower die ejector pin assembly (9) comprises a second ejector elastic piece (91) and a second ejector pin (92) connected with the second ejector elastic piece (91).

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