Negative angle forming stamping die and use method thereof

Abstract

The present invention relates to the field of molds, and specifically to a negative angle forming stamping mold and a method of using the same, comprising a lower mold assembly; the lower mold assembly comprises a lower mold plate, and the lower mold plate is provided with a part positioning base; the forming device comprises a die body arranged on an upper mold plate, and the die body is provided with a placement groove; a sliding base is provided on the die body; the sliding base is inserted into the placement groove; a punch block is provided on the side of the sliding base; the side of the sliding base has an inclined plane; the sliding base moves in the placement groove; the punch block moves on the inclined plane of the sliding base; the present invention discloses a negative angle forming stamping mold, and the stamping mold disclosed in the present invention can realize one-time molding of stamping parts that are closed on all sides and have negative angles; and greatly improves the stamping efficiency of parts.

Description

Technical Field

[0001] The present invention relates to the field of dies, in particular to a negative angle forming stamping die and a use method thereof. Background Art

[0002] Automobile cold stamping die is a kind of process equipment that uses a press to process metal materials into finished products or semi-finished products.

[0003] At present, for stamping parts with negative angles on automobiles, such as stamping parts with closed rings and negative angles, it is difficult to stamp them with general cold stamping dies, resulting in high costs for parts development. The existing production method is to form the parts in parts and then weld them. The traditional production method increases the cost of parts development and prolongs the process flow, which has an impact on cost control, quality control, and production efficiency.

[0004] Traditional negative-angle stamping dies are complex and rely on a wedge-driven forming mechanism. This overreliance on the wedge-driven force during production leads to unstable part formability and sometimes difficulty or even failure in demolding, directly reducing production efficiency and quality control.

[0005] In order to better improve production efficiency and facilitate demoulding, it is necessary to optimize the design of the existing mold structure. Summary of the Invention

[0006] The purpose of the present invention is to provide a stamping die which can be used for negative angle forming of stamping parts and is convenient for demoulding of parts.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A negative angle forming stamping die comprises an upper die assembly and a lower die assembly; the upper die assembly comprises an upper die plate, and the upper die plate is provided with a forming device;

[0009] The lower mold assembly includes a lower mold plate, and the lower mold plate is provided with a part positioning base;

[0010] The forming device comprises a die body arranged on the upper mold plate, the die body being provided with a placement groove; a sliding base being provided on the die body; the sliding base being inserted into the placement groove; and a punch block being provided on the side of the sliding base;

[0011] The side surface of the sliding base has an inclined plane; the horizontal projection area of ​​the side of the sliding base close to the lower template is smaller than the horizontal projection area of ​​the side of the sliding base away from the lower template;

[0012] The punch blade block includes a plurality of single blade blocks; each of the single blade blocks is arranged on the inclined plane of the sliding base;

[0013] The sliding base moves in the placement trough; the punch knife block moves on the inclined plane of the sliding base.

[0014] A hanging mechanism is provided between the sliding base and the die body, and the hanging mechanism includes a hanging groove arranged on the inner wall of the placement groove; a hanging protrusion is provided at the edge of the sliding base, and the sliding base is hung in the hanging groove through the hanging protrusion and connected to the die body.

[0015] The sliding base includes a base block, and a limiting ring block is provided above the base block; the vertical cross-section of the base block is trapezoidal; the limiting ring blocks are distributed at the edge of the base block; the horizontal projection area of ​​the limiting ring block is larger than the maximum horizontal projection area of ​​the base block; the side surface of the base block is an inclined plane.

[0016] The sliding base is provided with an avoidance trough; the avoidance trough extends from the limiting ring block to the inside of the base block; the depth of the avoidance trough is less than the thickness of the sliding base; the avoidance trough is arranged on the side of the sliding base close to the upper template.

[0017] A knife block guide block is provided on the side of the sliding base; the knife block guide block is connected to the corresponding single knife block; the horizontal cross-section of the knife block guide block is T-shaped; a T-slot is provided on the single knife block; the single knife block is sleeved on the corresponding knife block guide block through the T-slot.

[0018] A knife block stroke limiting mechanism is provided at the edge of the sliding base near one end of the lower template, and the knife block stroke limiting mechanism includes a limiting block arranged on the sliding base, and the limiting block protrudes from the sliding base; each individual knife block on the punch knife block is provided with an avoidance groove; the avoidance groove on each individual knife block is arranged opposite to the limiting block; the avoidance groove is connected to the T-slot on the corresponding individual knife block; the minimum width of the T-slot is not less than the width of the limiting block.

[0019] The sliding base is provided with an installation groove for installing a limiting block; one end of the limiting block is arranged inside the installation groove, and the other end extends away from one end of the sliding base.

[0020] The limiting block is a wedge-shaped block, and the side of the limiting block close to the installation sink is a plane; the side of the limiting block away from the installation sink is an inclined surface.

[0021] A reset mechanism is provided between the sliding base and the upper template. The reset mechanism comprises a reset spring. One end of the reset spring is connected to the sliding base, and the other end is connected to the upper template.

[0022] A method for using a stamping die, comprising the following steps:

[0023] Step 1: Assemble the stamping die and calibrate each component;

[0024] Step 2: Place the part to be stamped in the part positioning base of the lower die assembly;

[0025] Step 3: After step 2 is completed, the driving part of the upper die plate is started; the upper die assembly is controlled to move toward the side close to the lower die assembly; the forming of the part to be stamped is achieved through the extrusion of the upper die assembly and the lower die assembly;

[0026] Step 4: After step 3 is completed, the driving part of the upper mold plate is started to move the upper mold assembly away from the lower mold assembly; under the action of the reset mechanism and gravity, the upper mold assembly and the part to be processed are demolded;

[0027] Step 5: After step 4 is completed, the stamping operation of one part to be stamped is completed. If other parts need to be stamped, repeat steps 2-4.

[0028] The advantages of the present invention are:

[0029] The invention discloses a negative angle forming stamping die. The stamping die disclosed by the invention can realize one-time forming of a stamping part with a closed ring on all sides and a negative angle, thereby greatly improving the stamping forming efficiency of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following is a brief description of the contents and symbols in the drawings of the present invention:

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 It is a structural schematic diagram of the forming device in the present invention.

[0033] Figure 3 It is a three-dimensional diagram of the molding device in the present invention.

[0034] Figure 4 This is a structural diagram of the parts positioning base in the present invention.

[0035] Figure 5 It is a top view of the die body in the present invention.

[0036] Figure 6 It is a three-dimensional diagram of the die body in the present invention.

[0037] Figure 7 It is the front view of the sliding base in the present invention.

[0038] Figure 8 It is a top view of the sliding base in the present invention.

[0039] Figure 9 It is a three-dimensional diagram of the sliding base in the present invention.

[0040] Figure 10 It is a structural schematic diagram of the first embodiment of the single blade block in the punch blade block of the present invention.

[0041] Figure 11 It is a structural schematic diagram of the second embodiment of the single blade block in the punch blade block of the present invention.

[0042] Figure 12 It is a structural schematic diagram of the knife block guide block in the present invention.

[0043] Figure 13 It is a structural schematic diagram of the limit block in the present invention.

[0044] The marks in the above figure are:

[0045] 1. Upper die contour block, 2. Upper template, 3. Guide sleeve mounting block, 4. Guide sleeve, 5. Die body, 6. Sliding base, 7. Cutter block guide block, 8. Return spring, 9. Punch knife block, 10. Limit block, 11. Lower pad, 12. Lower die contour block, 13. Lower template, 14. Guide column mounting block, 15. Bottom limit column, 16. Storage block, 17. Guide column, 18. Part positioning base, 19. Lifting ear. DETAILED DESCRIPTION

[0046] The specific implementation of the present invention will be further explained in detail below by describing the best embodiment with reference to the accompanying drawings.

[0047] A negative angle forming stamping die comprises an upper die assembly and a lower die assembly; the invention discloses a negative angle forming stamping die, the stamping die disclosed in the invention can realize one-time forming of stamping parts with a closed ring and a negative angle, and greatly improves the stamping forming efficiency of parts.

[0048] The stamping die disclosed in the present invention is mainly used for negative angle forming of parts; it mainly includes an upper die assembly and a lower die assembly, the upper die assembly and the lower die assembly are arranged relative to each other, the upper die assembly includes an upper die plate 2, the setting of the upper die plate 2 facilitates the arrangement of other components, in addition, a forming device is provided on the upper die plate 2, the forming device mainly cooperates with the part positioning base 18 on the lower die plate 13 to finally realize the forming operation of the part.

[0049] In addition, the lower mold assembly in the present invention includes a lower mold plate 13, and a part positioning base 18 is provided on the lower mold plate 13; the lower mold plate 13 is a lower placement base, which facilitates the placement of the part positioning base 18, and the part positioning base 18 is a molding base, which facilitates the mutual cooperation with the molding device to ultimately realize the subsequent molding operation of the part.

[0050] At the same time, the forming device in the present invention includes a die body 5 arranged on the upper template 2, and the die body 5 is provided with a placement groove 51; a sliding base 6 is provided on the die body 5; the sliding base 6 is inserted into the placement groove 51; a punch knife block 9 is provided on the side of the sliding base 6; in the present invention, the punch knife block 9 is the basis for the subsequent negative angle forming of the parts; through the sliding of the punch knife block 9, the negative angle forming operation of the parts is finally realized. In addition, in the present invention, the punch knife block 9 is connected to the sliding base 6, and the sliding base 6 is connected to the die body 5, and the die body 5 acts as a connecting part and also as a guide part; in actual use, the punch knife block 9 serves as a primary forming mechanism, and the punch knife block 9 and the sliding base 6 serve as secondary forming mechanisms, and the forming operation of the parts is realized through the two-stage forming mechanism.

[0051] At the same time, the side surface of the sliding base 6 described in the present invention has an inclined plane 6-1; the setting of the inclined plane 6-1 here is the basis for the subsequent negative angle forming of the forming device of the present invention, that is, the horizontal projection area of ​​the sliding base 6 close to the lower template 13 in the present invention is smaller than the horizontal projection area of ​​the sliding base 6 away from the lower template 13; such a setting makes the lower end of the sliding base 6 an inverted quadrangular prism structure, and the inverted quadrangular prism structure here can guide the operation of the punch block 9, and the expansion of the punch block 9 can be achieved through the operation of the punch block 9 on the sliding base 6 and the simultaneous longitudinal movement of the punch tool and the sliding base 6; the punch block 9 is expanded to the designed size, which is convenient for subsequent parting. Part forming operation; at the same time, the punch knife block 9 in the present invention includes a plurality of single knife blocks; each of the single knife blocks is arranged on the inclined plane 6-1 of the sliding base 6; the single knife blocks are not connected to each other. Such a setting makes it possible to avoid motion interference between adjacent single knife blocks when the single knife blocks move along the inclined plane 6-1; in addition, the sliding base 6 in the present invention moves in the placement groove 51; the punch knife block 9 moves on the inclined plane 6-1 of the sliding base 6; the present invention is based on such a setting, which facilitates the increase of the external expansion of the punch knife block 9 during subsequent forming, facilitates the forming operation of the part, and also facilitates the retraction of the punch knife block 9 due to gravity after forming, which facilitates the separation between the part and the upper mold assembly.

[0052] Specifically; the working principle of the present invention is:

[0053] The present invention discloses a negative angle forming stamping die;

[0054] This negative angle forming is completed in two stages. First, the part to be processed is placed in the part positioning base 18 as required;

[0055] When the mold is working, the punch knife block 9 contacts the inner curved surface of the part to be processed. At this time, the first-level stroke is started, the punch knife block 9 slides upward along the force normal, and the knife block shape expands outward. When the first-level stroke reaches the bottom, the upper plane of the knife block contacts the lower end surface of the limiting ring block 62 in the sliding base 6. Then the second-level stroke is started, the return spring 8 is compressed, and the sliding base 6 slides upward along the force method in the die body 5. When the sliding base 6 reaches the bottom, the outward expansion shape of the punch knife block 9 reaches the required state. At this time, the outer curved surface of the punch knife block 9 and the inner cavity of the die body 5 form the angle and space required for negative angle forming, completing the negative angle forming of the part.

[0056] Principle of part demoulding: After the part is formed, the mold opens with the return stroke of the machine tool. The compressed reset spring 8 begins to reset and pushes the sliding base 6 downward, and the part is separated from the die body 5. At the same time, the punch block 9 is no longer under force. The punch block 9 slides downward due to its own weight and the shape of the knife block shrinks inward. After the knife block shrinks inward, it is smaller than the inner curved surface size of the part after negative angle forming, and the part is demoulded.

[0057] Furthermore, in the present invention, a hanging mechanism is provided between the sliding base 6 and the die body 5, and the hanging mechanism includes a hanging groove 52 arranged on the inner wall of the placement groove 51; a hanging protrusion 63 is provided at the edge of the sliding base 6, and the sliding base 6 is hung in the hanging groove 52 and connected to the die body 5 through the hanging protrusion 63; the present invention facilitates the hanging of the sliding base 6 on the die body 5 through the setting of the hanging mechanism, and facilitates the connection between the sliding base 6 and the die body 5. Before use, the sliding base 6 is equivalent to being arranged inside the die body 5. At the same time, the sliding base 6 and the die body 5 in the present invention are hung, not fixedly connected, so in subsequent use, the sliding base 6 can be moved relative to the die body 5; it is convenient to adjust the external expansion size of the punch knife block 9 as needed; in addition, in the present invention, the placement groove 51 on the die body 5 also plays a guiding role; it is mainly used for the longitudinal movement guidance of the sliding base 6 in the die body 5.

[0058] Furthermore, in the present invention, the sliding base 6 includes a base block 61, and a limiting ring block 62 is provided above the base block 61; the vertical cross-section of the base block 61 is trapezoidal; the limiting ring block 62 is distributed at the edge of the base block 61; the horizontal projection area of ​​the limiting ring block 62 is larger than the maximum horizontal projection area of ​​the base block 61; the side of the base block 61 is an inclined plane 6-1; in the present invention, the base block 61 is a structure that subsequently cooperates with the punch knife block 9 to operate, mainly to guide and limit the subsequent movement of the punch knife block 9; in addition, in the present invention, the limiting ring block 62 is a guide and limiting member. When used as a guide member, it is used in conjunction with the placement of the sink 51 in subsequent use to ensure the linearity of the movement of the sliding base 6; and as for the limiting member, it can limit the running position of the punch knife block 9 on the sliding base 6 to prevent the punch knife block 9 from detaching from the sliding base 6 from above.

[0059] Furthermore, in the present invention, an avoidance groove 64 is provided on the sliding base 6; the avoidance groove 64 extends from the limiting ring block 62 to the inside of the base block 61; the depth of the avoidance groove 64 is less than the thickness of the sliding base 6; the avoidance groove 64 is arranged on the side of the sliding base 6 close to the upper template 2; the basic function of the avoidance groove 64 disclosed in the present invention is to play an avoidance role, and it is also to facilitate the subsequent arrangement and placement of the reset mechanism; at the same time, it also plays a good weight reduction role.

[0060] Furthermore, in the present invention, a knife block guide block 7 is provided on the side of the sliding base 6; the provision of the knife block guide block 7 facilitates the movement of each individual knife block along the side of the sliding base 6; and ensures the stability of the operation of each individual knife block. Specifically, in the present invention, the knife block guide block 7 is connected to the corresponding individual knife block; the horizontal cross-section of the knife block guide block 7 is T-shaped; a T-slot 91 is provided on the individual knife block; the individual knife block is sleeved on the corresponding knife block guide block 7 through the T-slot 91; the present invention can play a good self-limiting function through the design of the T-slot guide block 7 and the T-slot 91 on the individual knife block, so that the knife block guide block 7 has a good hanging function in addition to the guiding function, thereby ensuring the stability of the connection between the punch knife block 9 and the sliding base 6.

[0061] Furthermore, in the present invention, a knife block stroke limiting mechanism is provided at the edge of the sliding base 6 near one end of the lower template 13, and the knife block stroke limiting mechanism includes a limiting block 10 arranged on the sliding base 6, and the limiting block 10 protrudes from the sliding base 6; each monomer knife block on the punch knife block 9 is provided with an avoidance groove 92; the avoidance groove 92 on each monomer knife block is arranged relative to the limiting block 10; the avoidance groove 92 is connected to the T-slot 91 on the corresponding monomer knife block; the minimum width of the T-slot 91 is not less than the width of the limiting block 10; the setting of the limiting block 10 prevents the punch knife block 9 from detaching from the sliding base 6 from the bottom of the sliding base 6; the setting of the avoiding groove 92 in the present invention can ensure the downward movement of the punch knife block 9, and at the same time avoid interference with the limiting block 10 when the punch knife block 9 moves downward,

[0062] Furthermore, in the present invention, the sliding base 6 is provided with an installation groove 65 for installing the limit block 10; one end of the limit block 10 is arranged inside the installation groove 65, and the other end extends away from one end of the sliding base 6; the setting of the installation groove plays a good positioning role; it facilitates the subsequent installation, positioning and placement of the limit block 10; at the same time, the setting of the installation groove plays a good lateral limiting role, avoiding the rotational deviation of the limit block 10.

[0063] Furthermore, in the present invention, the limit block 10 is a wedge-shaped block, and the side of the limit block 10 close to the installation groove 65 is a plane 101; the side of the limit block 10 away from the installation groove 65 is an inclined surface 102; the present invention uses such a design to make the upper end plane of the limit block 10 fit together with the inner side surface of the installation groove 65 to play a mutual positioning role, and the lower end surface of the limit block 10 is an inclined surface, requiring that the distance between the lower end surface of the limit block 10 away from the end of the base block and the upper template 2 is smaller than the distance between the lower end surface of the limit block 10 close to the end of the base block and the upper template 2. Such a setting reduces the space occupied by the outer side of the lower end of the limit block 10, can play a good avoidance role, and avoids interference with the lower template 13 during the subsequent operation of the upper mold assembly; at the same time, it also avoids the limit block 10 from contacting the processed parts.

[0064] Furthermore, in the present invention, a reset mechanism is provided between the sliding base 6 and the upper template 2, and the reset mechanism includes a reset spring 8, one end of the reset spring 8 is connected to the sliding base 6, and the other end is connected to the upper template 2; in the present invention, a reset mechanism is provided, and when the reset mechanism is subsequently used, the compressed reset spring 8 begins to reset and push the sliding base 6 downward; thereby, the part is separated from the die body 5; and the subsequent demolding operation is convenient.

[0065] A method for using a stamping die, comprising the following steps:

[0066] Step 1: Assemble the stamping die and calibrate each component;

[0067] Step 2: Place the part to be stamped in the part positioning base 18 of the lower die assembly;

[0068] Step 3: After step 2 is completed, the driving part of the upper die plate 2 is started; the upper die assembly is controlled to move toward the side close to the lower die assembly; the forming of the part to be stamped is achieved through the extrusion of the upper die assembly and the lower die assembly;

[0069] Step 4: After step 3 is completed, the driving part of the upper mold plate 2 is started to move the upper mold assembly away from the lower mold assembly; under the action of the reset mechanism and gravity, the upper mold assembly and the workpiece to be processed are demoulded;

[0070] Step 5: After step 4 is completed, the stamping operation of one part to be stamped is completed. If other parts need to be stamped, repeat steps 2-4.

[0071] The present invention can realize negative angle stamping forming of parts through the above-mentioned use method.

[0072] specific;

[0073] A punch and die integrated negative angle forming stamping die process includes: an upper die contour block 1, an upper template 2, a guide sleeve 4 mounting block 3, a guide sleeve 4, a die body 5, a sliding base 6, a knife block guide block 7, a reset spring 8, a punch knife block 9, a limit block 10, a lower pad 11, a lower die contour block 12, a lower template 13, a guide column 17 mounting block 14, a bottom limit column 15, a storage block 16, a guide column 17, a part positioning base 18, and a lifting ear 19.

[0074] Sliding base 6: It is installed in the die body 5, and a hanging mechanism is provided between the die body 5 and the sliding base 6; specifically, a hanging groove 52 is provided at the corner of the placement groove 51 in the die body 5; a hanging protrusion 63 is provided on the sliding base 6, and a return spring 8 is provided on the upper part. One end of the return spring 8 is installed on the base processing surface, and a spring retainer is provided on the spring mounting surface, and the other end is against the bottom of the above-mentioned upper template 2, so that the sliding base 6 can realize up and down stroke movement in the die body 5.

[0075] The above-mentioned knife block guide block 7 is installed on the sliding base 6 to enable the punch knife block 9 to slide in the normal direction, upward and downward.

[0076] The above-mentioned punch knife block 9: It is installed on the knife block guide block 7. When the mold is working, the lower part of the punch knife block 9 contacts the part, causing it to slide upward along the normal direction and expand outward. When it reaches the bottom, the upper part of the knife block contacts the sliding base 6, forming the angle and space required for negative angle forming with the inner cavity of the die body 5.

[0077] The above-mentioned limit block 10 is installed at the bottom of the sliding base 6. After the part is formed, the punch knife block 9 slides downward, so that the sliding stroke of the punch knife block 9 is controlled.

[0078] The above-mentioned die body 5 is installed at the lower part of the upper mold plate 2. The die body 5 exerts downward forming force, and the punch block 9 slides upward along the normal direction to form the angle and space required for negative angle forming.

[0079] The above-mentioned part positioning base 18 is installed on the upper part of the lower template 13, and its fixed part position does not make any movement. When it reaches the bottom, a safety gap is reserved with the die body 5 to ensure the consistency of the parts.

[0080] The above-mentioned general bodies include: upper die contour block 1, upper template 2, guide sleeve 4 mounting block 3, guide sleeve 4, return spring 8, lower pad 11, lower die contour block 12, lower template 13, guide column 17 mounting block 14, bottom limit column 15, storage block 16, guide column 17, lifting ear 19, etc., which can be adjusted according to the mold structure design requirements or production needs.

[0081] The working principle of the described one-piece punch and die negative angle forming stamping die process: This negative angle forming process is completed by two-stage strokes. First, the parts of the previous process are placed in the part positioning base 18 as required. When the mold is working, the punch knife block 9 contacts the inner curved surface of the part. At this time, the first-stage stroke is started, the punch knife block 9 slides upward along the force normal, and the knife block shape expands outward. When the first-stage stroke reaches the bottom, the upper plane of the knife block contacts the sliding base 6. At this time, the second-stage stroke is started, the reset spring 8 is compressed, and the sliding base 6 slides upward along the force normal in the die body 5. When the sliding base 6 reaches the bottom, the outward expansion shape of the punch knife block 9 reaches the required state. At this time, the outer curved surface of the punch knife block 9 and the inner cavity of the die body 5 form the angle and space required for negative angle forming, completing the negative angle forming of the part.

[0082] The part demoulding principle of the punch and die integrated negative angle forming stamping die process is as follows: after the part is formed, the die opens with the return stroke of the machine tool, and the compressed spring begins to reset to push the sliding base 6 downward, and the part is separated from the die body 5. At the same time, the punch knife block 9 is no longer under force, and the punch knife block 9 slides downward due to its own weight, and the knife block shape shrinks inward. After the knife block shrinks inward, it is smaller than the inner curved surface size of the part after negative angle forming, and the part is demoulded.

[0083] The mold disclosed in the present invention is used for metal stamping parts with negative angles in automobile parts. During the parts development and production process, it can effectively reduce development costs, improve production efficiency, and ensure the consistency of parts quality control.

[0084] The part positioning base 18 is located at the bottom of the mold, which fixes the part position and does not allow it to move. A safety gap is reserved with the die body 5 to ensure the consistency of the parts.

[0085] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A negative angle forming stamping die, characterized in that: It includes an upper mold assembly and a lower mold assembly; the upper mold assembly includes an upper mold plate, and the upper mold plate is provided with a forming device; The lower mold assembly includes a lower mold plate, and the lower mold plate is provided with a part positioning base; The forming device comprises a die body arranged on the upper mold plate, the die body being provided with a placement groove; a sliding base being provided on the die body; the sliding base being inserted into the placement groove; and a punch block being provided on the side of the sliding base; The side surface of the sliding base has an inclined plane; the horizontal projection area of ​​the side of the sliding base close to the lower template is smaller than the horizontal projection area of ​​the side of the sliding base away from the lower template; The punch blade block includes a plurality of single blade blocks; each of the single blade blocks is arranged on the inclined plane of the sliding base; The sliding base moves in the placement trough; the punch block moves on the inclined plane of the sliding base; A hanging mechanism is provided between the sliding base and the die body, and the hanging mechanism includes a hanging groove provided on the inner wall of the placement groove; a hanging protrusion is provided on the edge of the sliding base, and the sliding base is hung in the hanging groove and connected to the die body through the hanging protrusion; The sliding base includes a base block, and a limiting ring block is provided above the base block; the vertical cross-section of the base block is trapezoidal; the limiting ring blocks are distributed at the edge of the base block; the horizontal projection area of ​​the limiting ring block is larger than the maximum horizontal projection area of ​​the base block; the side surface of the base block is an inclined plane.

2. A negative angle forming stamping die according to claim 1, characterized in that: The sliding base is provided with an avoidance trough; the avoidance trough extends from the limiting ring block to the inside of the base block; the depth of the avoidance trough is less than the thickness of the sliding base; the avoidance trough is arranged on the side of the sliding base close to the upper template.

3. The negative angle forming stamping die according to claim 1, characterized in that: A knife block guide block is provided on the side of the sliding base; the knife block guide block is connected to the corresponding single knife block; the horizontal cross-section of the knife block guide block is T-shaped; a T-slot is provided on the single knife block; the single knife block is sleeved on the corresponding knife block guide block through the T-slot.

4. A negative angle forming stamping die according to claim 3, characterized in that: A knife block stroke limiting mechanism is provided at the edge of the sliding base near one end of the lower template, and the knife block stroke limiting mechanism includes a limiting block arranged on the sliding base, and the limiting block protrudes from the sliding base; each individual knife block on the punch knife block is provided with an avoidance groove; the avoidance groove on each individual knife block is arranged opposite to the limiting block; the avoidance groove is connected to the T-slot on the corresponding individual knife block; the minimum width of the T-slot is not less than the width of the limiting block.

5. The negative angle forming stamping die according to claim 4, characterized in that: The sliding base is provided with an installation groove for installing a limiting block; one end of the limiting block is arranged inside the installation groove, and the other end extends away from one end of the sliding base.

6. The negative angle forming stamping die according to claim 5, characterized in that: The limiting block is a wedge-shaped block, and the side of the limiting block close to the installation sink is a plane; the side of the limiting block away from the installation sink is an inclined surface.

7. A negative angle forming stamping die according to any one of claims 1 to 6, characterized in that: A reset mechanism is provided between the sliding base and the upper template. The reset mechanism comprises a reset spring. One end of the reset spring is connected to the sliding base, and the other end is connected to the upper template.

8. The method for using the stamping die according to any one of claims 1 to 7, wherein: The method of use comprises the following steps: Step 1: Assemble the stamping die and calibrate each component; Step 2: Place the part to be stamped in the part positioning base of the lower die assembly; Step 3: After step 2 is completed, the driving part of the upper die plate is started; the upper die assembly is controlled to move toward the side close to the lower die assembly; the forming of the part to be stamped is achieved through the extrusion of the upper die assembly and the lower die assembly; Step 4: After step 3 is completed, the driving part of the upper mold plate is started to move the upper mold assembly away from the lower mold assembly; under the action of the reset mechanism and gravity, the upper mold assembly and the part to be processed are demolded; Step 5: After step 4 is completed, the stamping operation of one part to be stamped is completed. If other parts need to be stamped, repeat steps 2-4.

Images