A guided precision stamping die

Abstract

The utility model discloses a kind of stamping die of orientation precision, it is related to stamping die technical field, including the upper die and lower die connected by guide pillar;The upper end surface of lower die is equipped with die holder, two stamping grooves are provided on the die holder, and guiding groove is opened between two stamping grooves;The upper end surface of upper die is equipped with die handle, the lower end surface of upper die is equipped with two stamping head of interval arrangement, and guiding block is protruded between two stamping head;Two stamping head and two stamping groove are one-to-one adaptation, guiding block is adapted with guiding groove;Along the direction of closing die, the length size of guiding block is greater than the length size of stamping head;The two side walls of guiding block are concave arc surface structure, and two concave arc surface structures are about the center plane of guiding block symmetry, the inside wall of guiding groove is the inner convex arc surface structure that is complementary with the concave arc surface structure;Iron can stamping precision and die service life are improved.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, specifically a stamping die with precise guidance. Background Technology

[0002] In the tin can manufacturing process, stamping is a crucial step, requiring stamping dies to process tinplate sheets into components such as the can body, can bottom, and can lid. Currently, conventional stamping dies rely on guide pillars and guide sleeves to ensure accuracy during the mold closing process of the upper and lower dies. However, with long-term use, the guide pillars and guide sleeves are prone to wear due to direct sliding contact, leading to a decrease in mold closing accuracy and affecting the stamping quality of tin can components. Problems such as dimensional deviations in the can body and incomplete can lid sealing occur frequently. Especially when manufacturing irregularly shaped tin cans (such as can bodies with special curved surfaces or can lids with complex structures), the accuracy requirements for mold closing guidance are even higher. Errors caused by wear in traditional guide structures can result in stamped tin can components that fail to meet design standards, increasing the defect rate and hindering the improvement of tin can production efficiency and quality.

[0003] Therefore, there is an urgent need for a stamping die that is precise in its guidance, can adapt to the diverse stamping needs of tin cans, and can reduce the wear of guiding components and ensure long-term stable and precise mold closing, so as to promote the optimization and upgrading of tin can production processes and improve product quality and production efficiency. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0005] A precision-guided stamping die includes an upper die and a lower die connected by guide pillars;

[0006] A mold base is installed on the upper end face of the lower mold, and two stamping grooves are provided on the mold base in a spaced-apart manner, with a guide groove between the two stamping grooves;

[0007] The upper end face of the upper die is equipped with a die handle, and the lower end face of the upper die is provided with two stamping heads arranged at intervals, and a guide block is protruding between the two stamping heads.

[0008] The two stamping heads are adapted to the two stamping grooves one by one, and the guide block is adapted to the guide groove;

[0009] Along the mold closing direction, the length of the guide block is greater than the length of the stamping head;

[0010] The two side walls of the guide block are concave arc surface structures, and the two concave arc surface structures are symmetrical about the central plane of the guide block. The inner side wall of the guide groove is a convex arc surface structure that is complementary to the concave arc surface structure. When the mold is closed, the concave arc surface structure and the convex arc surface structure form a guide pair.

[0011] As a further embodiment of this utility model: the concave arc surface structure of the guide block forms an interval space with the adjacent stamping head;

[0012] The inner convex arc surface structure of the guide groove forms a clearance plane with the adjacent stamping groove.

[0013] As a further embodiment of this utility model: a slot communicating with the guide groove is provided through the upper end face of the lower mold.

[0014] As a further embodiment of this utility model: the upper end face of the lower mold has a plurality of positioning posts arranged in an array, and the mold base is detachably connected to the lower mold through at least two of the positioning posts.

[0015] As a further embodiment of this utility model: the upper end face of the lower mold is also provided with a locking component that acts on the mold base, and four locking components are provided, corresponding to the four corners of the mold base respectively;

[0016] The locking assembly includes a column, a threaded rod, a pressure plate, and a nut. The column is flush with the mold base and located outside the mold base. The threaded rod is located between the column and the mold base. One end of the pressure plate overlaps the top of the column, and the other end extends to the upper surface of the mold base. The threaded rod passes through the middle of the pressure plate. The nut is screwed onto the threaded rod and located above the pressure plate, used to press the pressure plate tightly between the column and the mold base.

[0017] As a further embodiment of this utility model: the lower end face of the upper mold is detachably connected to an mounting plate, and the stamping head and guide block are both connected to the mounting plate.

[0018] As a further embodiment of this utility model: the upper mold and the lower mold each have a connecting portion extending outwards at opposite diagonal positions, and the guide post is installed on the connecting portion.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1) By cooperating with the concave and convex arc surfaces of the guide block and guide groove, a high-precision guide pair is formed. Working in conjunction with the guide post guiding structure, when the mold is closed, the guide block, due to its length advantage, contacts the guide groove first to complete the pre-positioning. At the same time, the continuous guiding function of the guide post is utilized. The dual mechanism jointly constrains the mold movement trajectory, effectively reducing offset and tilting. Compared with single guide post guidance, this composite structure reduces the precision decay caused by component wear, reduces the can body size deviation rate, significantly improves the can lid sealing performance, and ensures the product qualification rate.

[0021] 2) The mold adopts a detachable mold base and mounting plate design. The lower mold base can be quickly replaced through positioning pins to adapt to different specifications of stamping grooves. The upper mold's stamping head, guide block and mounting plate can be detachably connected, which is convenient for replacing mold components and meets the rapid production needs of diverse parts of tin cans.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the upper mold in this utility model.

[0026] The reference numerals and names in the figure are as follows:

[0027] 1. Guide post; 2. Upper die; 3. Lower die; 4. Die base; 5. Stamping groove; 6. Guide groove; 7. Die handle; 8. Stamping head; 9. Guide block; 10. Concave arc surface structure; 11. Convex arc surface structure; 12. Clearance plane; 13. Positioning post; 14. Column; 15. Threaded rod; 16. Pressure plate; 17. Mounting plate; 18. Connecting part. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-2 In this embodiment of the utility model, a precise guiding stamping die is used to stamp tinplate sheets in the production of tin cans, thereby forming parts such as the can body, can bottom, and can lid. This solves the problems of traditional die closing accuracy being easily affected and difficulty in adapting to the production of irregularly shaped tin cans, thus improving the stamping quality and production efficiency of tin cans.

[0030] The mold mainly consists of an upper mold 2 and a lower mold 3 connected by guide pillars 1. A mold base 4 is mounted on the upper surface of the lower mold 3, and the mold base 4 has two spaced-apart stamping grooves 5, with a guide groove 6 between the two stamping grooves 5. A mold shank 7 is mounted on the upper surface of the upper mold 2, which is used to fix and connect to the press to transmit the vertical stamping power of the press. Two spaced-apart stamping heads 8 are provided on the lower surface, with a guide block 9 protruding between the two stamping heads 8. The stamping heads 8 are fitted with the stamping grooves 5, and the guide block 9 is fitted with the guide groove 6. Along the mold closing direction, the guide block 9 is longer than the stamping head 8. During mold closing, the guide block 9 contacts the guide groove 6 first, pre-guiding the stamping head 8 into the groove and improving the accuracy of mold closing.

[0031] The guide block 9 has two concave arc surface structures 10 on both sides, symmetrical about the central plane. The inner side wall of the guide groove 6 has a convex arc surface structure 11 that complements the concave arc surface structure 10. When the mold is closed, the two form a guide pair, using the arc surface to guide the upper mold 2 to move along a preset path, which is suitable for the high requirements of guiding accuracy in tin can stamping, while reducing direct sliding wear between guide components and ensuring long-term stable mold closing. The concave arc surface structure 10 of the guide block 9 forms a gap space with the adjacent stamping head 8 to avoid interference between the stamping head 8 and the guide block 9 when the mold is closed. The convex arc surface structure 11 of the guide groove 6 forms a clearance plane 12 with the adjacent stamping groove 5. This clearance plane 12 not only prevents structural interference during stamping, but also serves as a load-bearing area when the tin can is stamped to form structures such as flanges, providing space for flanges and adapting to the diverse structural forming requirements of tin cans.

[0032] The upper surface of the lower mold 3 has a slot that runs through it and connects to the guide groove 6. This slot is used to further adapt to the length of the guide block 9, ensuring smooth movement of the guide block 9 during mold closing and optimizing the mold's adaptability to guide blocks 9 of different specifications. Several positioning posts 13 are arranged in an array on the upper surface of the lower mold 3. The mold base 4 is detachably connected to the lower mold 3 through at least two positioning posts 13. This allows for quick replacement of the mold base 4 to meet the stamping requirements of different tin can parts, improving the mold's versatility.

[0033] The upper surface of the lower die 3 is provided with four locking components that act on the die base 4, corresponding to the four corners of the die base 4. The locking components include a column 14, a threaded rod 15, a pressure plate 16, and a nut (not shown). The column 14 is flush with the die base 4 and located on the outside of the die base 4. One end of the pressure plate 16 overlaps the top of the column 14, and the other end extends to the upper surface of the die base 4. The threaded rod 15 passes through the middle of the pressure plate 16. The nut is screwed onto the threaded rod 15 and located above the pressure plate 16. By pressing the pressure plate 16 with the nut, the die base 4 is pressed tightly between the column 14 and the lower die 3, ensuring that the die base 4 is stable and does not shift during the stamping process, thus ensuring stamping accuracy.

[0034] The lower end face of the upper die 2 is detachably connected to the mounting plate 17 (e.g., by screws). The stamping head 8 and guide block 9 are both connected to the mounting plate 17, allowing for flexible replacement of different specifications of the stamping head 8 and guide block 9 according to the style of the tin can parts, adapting to diverse production needs. The diagonal positions of the upper die 2 and lower die 3 extend outwards to form connecting parts 18. Guide pillars 1 are installed in the connecting parts 18, making the layout of the guide pillars 1 more reasonable and improving the overall structural stability and mold closing guidance accuracy of the mold. Specifically, distributing the guide pillars 1 in the diagonal area of ​​the mold, compared to other layouts, allows the support and guidance of the guide pillars 1 to more evenly cover the entire mold plane. For example, if the guide pillars 1 are concentrated in the middle or on one side of the mold, the force and guidance of the mold are easily uneven during mold closing. The diagonal distribution ensures that all parts of the mold are stably constrained and guided by the guide pillars 1 during mold opening and closing. At the same time, it reduces interference from the mold base 4 and the re-locking of the locking components after replacing the mold base 4.

[0035] In summary:

[0036] By engaging the concave and convex arc surfaces of the guide block 9 and the guide groove 6, a high-precision guide pair is formed. Working in conjunction with the guide pillar 1, the guide block 9, with its length advantage, contacts the guide groove 6 first to complete the pre-positioning during mold closing. Simultaneously, the guide pillar 1 provides continuous guidance. This dual mechanism constrains the mold's movement trajectory, effectively reducing offset and tilting. Compared to single guide pillar 1 guidance, this composite structure reduces the precision decay caused by component wear, resulting in a lower can body dimensional deviation rate, significantly improved can lid sealing, and guaranteed product qualification rate.

[0037] The mold adopts a detachable mold base 4 and mounting plate 17 design. The lower mold 3 and mold base 4 can be quickly replaced through positioning pins 13 to adapt to different specifications of stamping grooves 5. The stamping head 8 and guide block 9 of the upper mold 2 are detachably connected to the mounting plate 17, which facilitates the replacement of mold components and meets the rapid production needs of diverse parts of tin cans.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A precision-guided stamping die, characterized in that, It includes an upper mold and a lower mold connected by guide pillars; A mold base is installed on the upper end face of the lower mold, and two stamping grooves are provided on the mold base in a spaced-apart manner, with a guide groove between the two stamping grooves; The upper end face of the upper die is equipped with a die handle, and the lower end face of the upper die is provided with two stamping heads arranged at intervals, and a guide block is protruding between the two stamping heads. The two stamping heads are adapted to the two stamping grooves one by one, and the guide block is adapted to the guide groove; Along the mold closing direction, the length of the guide block is greater than the length of the stamping head; The two side walls of the guide block are concave arc surface structures, and the two concave arc surface structures are symmetrical about the central plane of the guide block. The inner side wall of the guide groove is a convex arc surface structure that is complementary to the concave arc surface structure. When the mold is closed, the concave arc surface structure and the convex arc surface structure form a guide pair.

2. The precision-guided stamping die according to claim 1, characterized in that, The concave arc surface structure of the guide block forms a gap space with the adjacent stamping head; The inner convex arc surface structure of the guide groove forms a clearance plane with the adjacent stamping groove.

3. The precision-guided stamping die according to claim 1, characterized in that, A slot communicating with the guide groove is provided through the upper end face of the lower mold.

4. A precision-guided stamping die according to any one of claims 1-3, characterized in that, The upper surface of the lower mold has a number of positioning posts arranged in an array, and the mold base is detachably connected to the lower mold through at least two of the positioning posts.

5. A precision-guided stamping die according to claim 4, characterized in that, The upper end face of the lower mold is also provided with a locking component that acts on the mold base. There are four locking components, which correspond to the four corners of the mold base respectively. The locking assembly includes a column, a threaded rod, a pressure plate, and a nut. The column is flush with the mold base and located outside the mold base. The threaded rod is located between the column and the mold base. One end of the pressure plate overlaps the top of the column, and the other end extends to the upper surface of the mold base. The threaded rod passes through the middle of the pressure plate. The nut is screwed onto the threaded rod and located above the pressure plate, used to press the pressure plate tightly between the column and the mold base.

6. A precision-guided stamping die according to claim 4, characterized in that, The lower end face of the upper die is detachably connected to a mounting plate, and the stamping head and guide block are both connected to the mounting plate.

7. A precise guiding stamping die according to claim 1, characterized in that, The upper and lower molds each have a connecting portion extending outwards at opposite corners, and the guide post is installed on the connecting portion.

Images