Reverse forming die
By introducing a blank holder and an elastic element into the mold, the forming quality problem caused by the movement of the sheet before stamping is solved, and the stable fixing and efficient forming of the sheet are achieved.
Patent Information
- Application Number
- CN202423218674.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-26
AI Technical Summary
During the mold processing, when the blank is aligned with the lower forming part of the die, the blank may vibrate, leading to a decrease in forming quality.
A reverse forming mold is used. By setting a pressure body and an elastic element in the upper mold assembly, the pressure part of the sheet is fixed first, and then stamping is performed. The elastic force of the elastic element is used to keep the sheet fixed and prevent the sheet from moving before stamping.
It effectively fixes the sheet material, preventing it from moving before stamping, thus improving molding quality and product qualification rate.
Smart Images
Figure CN223684301U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to die technical field especially relates to reverse forming die. BACKGROUND
[0002] In today's era of rapid industrial development, die machining is the main means of rapid batch production, so the die with high precision, convenient operation and strong applicability is the key to improve production efficiency. At present, part of the die is carried by the pressure ring in the mode that the patch is corresponding to the lower forming part of the lower die with the pressed part outside the to-be-punched part and the pressure ring of the lower die corresponding to the pressed part, the upper die and the lower die are closed to make the pressure edge of the upper die press on the pressed part of the patch and fix the patch with the pressure ring, and the die is continuously closed to make the pressure ring move downward to connect with the edge of the lower forming part. At this time, the upper forming part of the upper die presses the to-be-punched part of the patch on the lower forming part to punch and form the patch with the lower forming part.
[0003] When the to-be-punched part of the patch needs to be processed into a groove, the die is adjusted accordingly, that is, the lower forming part is partially sunken to form a forming groove, and the upper forming part is extended downward to form a protrusion matched with the size of the forming groove to meet the actual product forming requirements. In actual die closing, the upper forming part may first abut on the to-be-punched part and press on the to-be-punched part, at this time the pressure edge has not contacted the pressed part, the patch cannot be fixed and the patch may vibrate, which affects the forming quality and reduces the product qualification rate. UTILITY MODEL CONTENTS
[0004] To solve the above technical problems and achieve at least one advantage of the utility model, the utility model provides a reverse forming die, which comprises:
[0005] A lower die assembly, the lower die assembly has a forming groove, and the patch is carried by the lower die assembly in a mode that the to-be-punched part of the patch corresponds to the forming groove;
[0006] An upper die assembly is arranged above the lower die assembly in a moldable manner, the upper die assembly comprises an upper die body and a blank holder group, the upper die body comprises an upper die seat and a forming protrusion, the forming protrusion corresponds to the forming groove and is matched with the size of the forming groove, the upper die seat is arranged above the lower die assembly, the forming protrusion is formed by the upper die seat extending to the lower die assembly, the blank holder group comprises at least one blank holder body and at least one elastic piece, the blank holder body is arranged outside the forming protrusion, the blank holder body is movably installed on the upper die seat, and the two ends of the elastic piece are connected with the blank holder body and the upper die seat respectively, the material sheet borne by the lower die assembly is formed in a pressure receiving part outside the to-be-stamped part, the bottom end of the blank holder body is at a height lower than that of the bottom end of the forming protrusion when the upper die assembly and the lower die assembly remain in an open mold state, the blank holder body is pressed on the pressure receiving part of the material sheet to jointly press the material sheet with the lower die assembly when the upper die assembly and the lower die assembly are moved to perform mold closing, the upper die assembly and the lower die assembly continue to perform mold closing to make the forming protrusion abut against the to-be-stamped part of the material sheet and press the material sheet to the forming groove to jointly stamp the material sheet with the lower die assembly, and the blank holder body moves upward relative to the upper die body to make the elastic piece between the blank holder body and the upper die body elastically deform during the pressing of the forming protrusion, and the blank holder body moves downward relative to the upper die body to reset under the elastic force of the elastic piece when the upper die assembly and the lower die assembly are opened.
[0007] According to an embodiment of the present application, the elastic piece is installed on the top of the blank holder body, and the elastic piece can be compressed when the blank holder body moves upward relative to the upper die body.
[0008] According to an embodiment of the present application, the blank holder body is provided with a through hole, the size of the through hole is matched with the size of the forming protrusion, and the blank holder body is sleeved on the outer periphery of the forming protrusion.
[0009] According to an embodiment of the present application, the blank holder body is provided with a plurality of blank holder bodies, and the plurality of blank holder bodies are arranged at intervals on the outer periphery of the forming protrusion.
[0010] According to the utility model one embodiment, the reverse forming die includes spacing mechanism, the spacing mechanism includes first spacing component, the first spacing component includes at least a pair of first spacing piece and at least a pair of first be resisted piece, every pair first spacing piece is installed on the length direction of lower mould component and is spaced, every pair first be resisted piece is installed on the length direction of upper die seat and is spaced, when the upper die assembly and lower mould component close, every first be resisted piece is opposite with a first spacing piece and is abutted with corresponding first spacing piece, the upper die assembly is limited in its length direction through the abutment of every pair first be resisted piece and a pair of first spacing piece.
[0011] According to the utility model one embodiment, every pair of two first spacing pieces are oppositely arranged, and when the upper die assembly and the lower mould component are closed, every pair of first be resisted pieces are located between a pair of first spacing pieces.
[0012] According to the utility model one embodiment, the first spacing piece and the first be resisted piece are provided with two pairs, two pairs of first spacing pieces are spaced apart in the width direction of the lower mould component, and two pairs of first be resisted pieces are spaced apart in the width direction of the upper die seat.
[0013] According to the utility model one embodiment, the spacing mechanism includes a second spacing component, the second spacing component includes at least a pair of second spacing piece and at least a pair of second be resisted piece, every pair second spacing piece is installed on the width direction of lower mould component and is spaced, every pair second be resisted piece is installed on the width direction of upper die seat and is spaced, when the upper die assembly and lower mould component close, every second be resisted piece is opposite with a second spacing piece and is abutted with corresponding second spacing piece, the upper die assembly is limited in its width direction through the abutment of every pair second be resisted piece and a pair of second spacing piece.
[0014] According to the utility model one embodiment, every pair of two second be resisted pieces are oppositely arranged, and when the upper die assembly and the lower mould component are closed, every pair of second spacing pieces are located between a pair of second be resisted pieces.
[0015] According to the utility model one embodiment, the second spacing piece and the second be resisted piece are provided with two pairs, two pairs of second spacing pieces are spaced apart in the length direction of the lower mould component, and two pairs of second be resisted pieces are spaced apart in the length direction of the upper die seat. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The structure of the reverse forming die of the utility model is shown.
[0017] Figure 2The utility model discloses a reverse forming die's structure section view is shown.
[0018] Figure 3 The utility model discloses a reverse forming die's upper die assembly's structure schematic view is shown.
[0019] Figure 4 The utility model discloses a reverse forming die's lower die assembly's structure schematic view is shown. DETAILED DESCRIPTION
[0020] The following description is used to disclose the utility model to enable the person skilled in the art to realize the utility model. The preferred embodiment in the following description is only as an example, and other obvious variants can be thought of by the person skilled in the art. The basic principles of the utility model defined in the following description can be applied to other implementation schemes, variant schemes, improved schemes, equivalent schemes and other technical schemes without departing from the spirit and scope of the utility model.
[0021] The person skilled in the art should understand that in the disclosure of the utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the above-mentioned terms can not be understood as a limitation on the utility model.
[0022] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" can not be understood as a limitation on the number.
[0023] Reference Figures 1 to 4 According to the reverse forming die of a preferred embodiment of the utility model, the reverse forming die is used for stamping a piece of material, the piece of material has a to-be-stamped part and a stressed part formed outside the to-be-stamped part. The reverse forming die comprises an upper die assembly 10 and a lower die assembly 20, and the upper die assembly 10 is arranged above the lower die assembly 20 in a clamping manner.
[0024] Reference Figures 2 to 3The upper die assembly 10 comprises an upper die body 11 and a blank holder assembly 12. The upper die body 11 comprises an upper die seat 111 and a forming protrusion 112. The upper die seat 111 is arranged above the lower die assembly 20. The forming protrusion 112 is formed by the upper die seat 111 extending towards the lower die assembly 20. The blank holder assembly 12 comprises at least one blank holder body 121 and at least one elastic member 122. The blank holder body 121 is arranged outside the forming protrusion 112. The blank holder body 121 is movably installed on the upper die seat 111. The two ends of the elastic member 122 are connected with the blank holder body 121 and the upper die seat 111 respectively.
[0025] With reference to Figure 2 and Figure 4 The lower die assembly 20 has a forming groove 201. The forming protrusion 112 corresponds to the forming groove 201 and is adapted to the size of the forming groove 201. The blank is carried by the lower die assembly 20 in a manner that the to-be-stamped part corresponds to the forming groove 201 and the pressed part corresponds to the blank holder body 121. When the upper die assembly 10 and the lower die assembly 20 remain open, the height of the bottom end of the blank holder body 121 is lower than the height of the bottom end of the forming protrusion 112.
[0026] When the upper die assembly 10 and the lower die assembly 20 are moved to perform the closing operation, the blank holder body 121 is pressed against the pressed part of the blank to perform the blank holding together with the lower die assembly 20. After the blank holder body 121 and the lower die assembly 20 perform the blank holding together, the upper die assembly 10 and the lower die assembly 20 continue to perform the closing operation to make the forming protrusion 112 abut against the to-be-stamped part of the blank and press towards the forming groove 201, so as to stamp and form the blank together with the lower die assembly 20.
[0027] During the pressing of the forming protrusion 112, the blank holder body 121 moves upwards relative to the upper die body 11 to make the elastic member 122 between the blank holder body 121 and the upper die body 11 elastically deform. At this time, the blank holder body 121 is kept pressed against the blank by the elastic force of the elastic member 122, so as to ensure that the blank holding operation and the pressing operation do not affect each other. When the upper die assembly 10 and the lower die assembly 20 are opened, the blank holder body 121 moves downwards relative to the upper die body 11 to reset under the elastic force of the elastic member 122, so as to perform the next round of stamping and forming operation.
[0028] In this way, the reverse forming die first holds the blank and then presses the blank. Compared with the common die, the pressed part of the blank cannot be effectively fixed, and the to-be-stamped part of the blank is stamped first, which causes the blank to vibrate and affects the forming quality.
[0029] Preferably, the upper die body 11 is driven to move downward to close the upper die assembly 10 and the lower die assembly 20.
[0030] In an embodiment, the lower die assembly 20 is driven to move upward to close the upper die assembly 10 and the lower die assembly 20.
[0031] In another embodiment, the upper die body 11 and the lower die assembly 20 are driven to move toward each other to close the upper die assembly 10 and the lower die assembly 20.
[0032] Preferably, the elastic member 122 is implemented as a spring.
[0033] Preferably, the elastic member 122 is installed on the top of the blanking body 121, and the elastic member 122 is compressed when the blanking body 121 moves upward relative to the upper die body 11.
[0034] Alternatively, the elastic member 122 is installed on the bottom of the blanking body 121, and the elastic member 122 is stretched when the blanking body 121 moves upward relative to the upper die body 11.
[0035] In an embodiment, the blanking body 121 is provided with one, and the blanking body 121 has a through hole with a size matching that of the forming protrusion 112. The blanking body 121 is sleeved on the outer periphery of the forming protrusion 112.
[0036] Preferably, the blanking body 121 is provided with multiple, and the multiple blanking bodies 121 are arranged at intervals on the outer periphery of the forming protrusion 112. In this way, when the upper die assembly 10 and the lower die assembly 20 are closed, the multiple blanking bodies 121 can move to different degrees to meet the forming requirements of different thicknesses of the material sheet.
[0037] Reference Figures 1 to 4, the reverse forming mold comprises a limiting mechanism 30, the limiting mechanism 30 comprises a first limiting component 31, the first limiting component 31 comprises at least a pair of first limiting pieces 311 and at least a pair of first resisting pieces 312, each pair of the first limiting pieces 311 is installed in the length direction of the lower mold component 20, and each pair of the first resisting pieces 312 is installed in the length direction of the upper mold seat 111. When the upper mold component 10 and the lower mold component 20 are closed, each first resisting piece 312 is opposite to a first limiting piece 311 and abuts against the corresponding first limiting piece 311, and the upper mold component 10 is limited in the length direction by the abutting action of each pair of first resisting pieces 312 and a pair of first limiting pieces 311, so as to prevent the upper mold component 10 from moving in the length direction and increase the stability of the closed mold.
[0038] Preferably, two first limiting pieces 311 of each pair are arranged oppositely. When the upper mold component 10 and the lower mold component 20 are closed, each pair of first resisting pieces 312 is located between a pair of first limiting pieces 311. In other words, the part of the upper mold seat 111 provided with the first resisting pieces 312 is clamped between a pair of first limiting pieces 311, so as to be limited from moving in the length direction.
[0039] Preferably, the first limiting pieces 311 and the first resisting pieces 312 are both provided with two pairs, two pairs of first limiting pieces 311 are arranged in the width direction of the lower mold component 20, and two pairs of first resisting pieces 312 are arranged in the width direction of the upper mold seat 111, so as to improve the stability of the upper mold component 10 by the abutting action of the two pairs of first limiting pieces 311 and the two pairs of first resisting pieces 312 when the upper mold component 10 and the lower mold component 20 are closed.
[0040] It is worth mentioning that the first limiting pieces 311 and the first resisting pieces 312 are both implemented as wear-resistant materials.
[0041] Preferably, the first limiting pieces 311 are detachably installed on the lower mold component 20, and the first resisting pieces 312 are detachably installed on the upper mold seat 111, so as to replace the first limiting pieces 311 and the first resisting pieces 312 at will after wear, so as to effectively prevent shaking.
[0042] The limiting mechanism 30 comprises a second limiting assembly 32, the second limiting assembly 32 comprises at least one pair of second limiting members 321 and at least one pair of second abutting members 322, each pair of the second limiting members 321 is installed in the width direction of the lower die assembly 20, and each pair of the second abutting members 322 is installed in the width direction of the upper die seat 111. When the upper die assembly 10 and the lower die assembly 20 are closed, each second abutting member 322 is opposite to a second limiting member 321 and abuts against the corresponding second limiting member 321, and the upper die assembly 10 is limited in the width direction by the abutting action of each pair of second abutting members 322 and a pair of second limiting members 321, so as to prevent the upper die assembly 10 from moving in the width direction, and cooperate with the first limiting assembly 31 to effectively prevent shaking and improve product forming quality.
[0043] Preferably, the two second abutting members 322 of each pair are arranged opposite to each other. When the upper die assembly 10 and the lower die assembly 20 are closed, each pair of the second limiting members 321 is located between a pair of the second abutting members 322. In other words, the part of the lower die assembly 20 provided with the second limiting members 321 is clamped between a pair of the second abutting members 322, so as to be limited from moving in the width direction.
[0044] Preferably, the second limiting members 321 and the second abutting members 322 are both provided with two pairs, the two pairs of second limiting members 321 are arranged in the length direction of the lower die assembly 20, and the two pairs of second abutting members 322 are arranged in the length direction of the upper die seat 111, so as to improve the stability of the upper die assembly 10 by the abutting action of the two pairs of second limiting members 321 and the two pairs of second abutting members 322 when the upper die assembly 10 and the lower die assembly 20 are closed.
[0045] It is worth mentioning that the second limiting members 321 and the second abutting members 322 are both implemented by wear-resistant materials.
[0046] Preferably, the second limiting members 321 are detachably installed on the lower die assembly 20, and the second abutting members 322 are detachably installed on the upper die seat 111, so as to replace the second limiting members 321 and the second abutting members 322 at will after being worn, thereby effectively preventing shaking.
[0047] Those skilled in the art should understand that the embodiments of the utility model shown in the above description and the drawings are only examples and do not limit the utility model. The advantages of the utility model have been completely and effectively realized. The functions and structural principles of the utility model have been shown and explained in the embodiments, and the embodiments of the utility model can be deformed or modified without departing from the principles.
Claims
1. A reverse-forming die, characterized by, The reverse forming die comprises: a lower die assembly having a forming groove, a blank being carried by the lower die assembly in a manner that a to-be-punched part of the blank corresponds to the forming groove; an upper die assembly being arranged above the lower die assembly in a manner that the upper die assembly can be closed with the lower die assembly, the upper die assembly comprising an upper die body and a blank holder group, the upper die body comprising an upper die seat and a forming protrusion, the forming protrusion corresponding to the forming groove and being adapted to the size of the forming groove, the upper die seat being arranged above the lower die assembly, the forming protrusion being formed by the upper die seat extending towards the lower die assembly, the blank holder group comprising at least one blank holder body and at least one elastic member, the blank holder body being arranged outside the forming protrusion, the blank holder body being movably mounted on the upper die seat, and the elastic member having two ends connected with the blank holder body and the upper die seat respectively, a pressed part of the blank carried by the lower die assembly corresponding to the blank holder body outside the to-be-punched part, the height of the bottom end of the blank holder body being lower than the height of the bottom end of the forming protrusion when the upper die assembly and the lower die assembly are kept open, the blank holder body being pressed on the pressed part of the blank to jointly press the blank with the lower die assembly when the upper die assembly and the lower die assembly are moved to be closed, the upper die assembly and the lower die assembly continuing to perform the closing action to make the forming protrusion abut against the to-be-punched part of the blank and press towards the forming groove to jointly punch and form the blank with the lower die assembly, the blank holder body moving upwards relative to the upper die body to make the elastic member between the blank holder body and the upper die body elastically deform during the pressing of the forming protrusion, the blank holder body moving downwards relative to the upper die body to reset under the action of the elastic force of the elastic member when the upper die assembly and the lower die assembly are opened.
2. The inverse forming mold according to claim 1, wherein The elastic member is mounted on the top of the blank holder body, and the elastic member can be compressed when the blank holder body moves upwards relative to the upper die body.
3. The inverse forming mold of claim 1, wherein, The blank holder body is provided with one through hole, the size of the through hole being adapted to the size of the forming protrusion, and the blank holder body being sleeved on the outer periphery of the forming protrusion.
4. The inverse forming mold of claim 1, wherein The blank holder body is provided with a plurality of through holes, the plurality of blank holder bodies being arranged on the outer periphery of the forming protrusion in a spaced manner.
5. The inverse forming mold according to any one of claims 1 to 4, characterized in that, The reverse forming die comprises a limiting mechanism, the limiting mechanism comprising a first limiting assembly, the first limiting assembly comprising at least one pair of first limiting members and at least one pair of first abutting members, each pair of the first limiting members being mounted on the lower die assembly in a length direction in a spaced manner, each pair of the first abutting members being mounted on the upper die seat in a length direction in a spaced manner, each first abutting member being opposite to and abutting against a corresponding first limiting member when the upper die assembly and the lower die assembly are closed, and the upper die assembly being limited in the length direction by the abutting action of each pair of the first abutting members and a pair of the first limiting members.
6. The inverse forming mold of claim 5, wherein, The two first limiting members of each pair are oppositely arranged, and each pair of the first abutting members is located between a pair of the first limiting members when the upper die assembly and the lower die assembly are closed.
7. The inverse forming mold of claim 5, wherein The first limiting member and the first abutting member are both provided with two pairs, and the two pairs of first limiting members are spaced apart in the width direction of the lower die assembly, and the two pairs of first abutting members are spaced apart in the width direction of the upper die seat.
8. The reverse-forming die of claim 5, wherein, The limiting mechanism comprises a second limiting assembly, the second limiting assembly comprises at least one pair of second limiting members and at least one pair of second abutting members, each pair of the second limiting members is spaced apart and installed in the width direction of the lower die assembly, and each pair of the second abutting members is spaced apart and installed in the width direction of the upper die seat, each second abutting member is opposite to a second limiting member and abuts against the corresponding second limiting member when the upper die assembly and the lower die assembly are closed, and the upper die assembly is limited in the width direction by the abutting action of each pair of the second abutting members and a pair of the second limiting members.
9. The inverse forming mold of claim 8, wherein, The two second abutting members of each pair are oppositely arranged, and each pair of the second limiting members is located between a pair of the second abutting members when the upper die assembly and the lower die assembly are closed.
10. The reverse-forming die of claim 8, wherein, The second limiting member and the second abutting member are both provided with two pairs, and the two pairs of second limiting members are spaced apart in the length direction of the lower die assembly, and the two pairs of second abutting members are spaced apart in the length direction of the upper die seat.