Continuous stamping die for contact knife
By designing a continuous stamping die for the contact knife and utilizing the cooperation of the first bending punch and the float, the problem of the gap in the protective cavity during the processing of the contact knife was solved, ensuring that the contact knife dimensions are qualified and producing high-quality parts.
Patent Information
- Application Number
- CN202423306694.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-31
AI Technical Summary
During the processing of existing contact cutters, if the gap in the mold cavity is too small, the contact cutter is easily damaged; if the gap is too large, the dimensions will not meet the requirements.
A continuous stamping die for a contact knife is designed, including an upper die assembly and a lower die assembly. The vertical part of the contact knife is clamped by setting a first bending punch and a float block. The gap of the protective cavity is enlarged during die parting to avoid damaging the contact knife. The contact knife is clamped during die closing to ensure that the dimensions are qualified.
It achieves the protection of the cutting edge during mold parting to prevent damage, and ensures dimensional compliance during mold closing, thus producing high-quality parts.
Smart Images
Figure CN223775808U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hardware processing, specifically to a continuous stamping die for a contact knife. Background Technology
[0002] In the field of electrical equipment, the contact blade is a key conductive component; one type of contact blade is... Figure 1 As shown, its cross-section is T-shaped, with vertical parts 1a on both sides and horizontal parts 2a on both sides. There is also a mounting hole on the vertical part 1a. Stamping dies are widely used in the process of parts processing. This contact knife can be formed by simple continuous stamping. In the existing processing, it was found that after bending the two vertical parts 1a in stages, a protective cavity needs to be set on the lower end face of the upper stripper. By inserting the two vertical parts 1a into the protective cavity from bottom to top, they can fit more tightly to ensure that the dimensions are qualified. However, it was found in use that because the gap of the protective cavity is too small, the contact knife is easily damaged frequently. If the gap is too large, it will cause the vertical parts on both sides of the contact knife to not fit well, resulting in unqualified dimensions. Therefore, there is an urgent need for a continuous stamping die that can ensure the qualified dimensions of the contact knife. Utility Model Content
[0003] This invention provides a continuous stamping die for a contact knife, which can effectively solve the above-mentioned problems.
[0004] This utility model is implemented as follows:
[0005] A continuous stamping die for a contact knife includes an upper die assembly and a lower die assembly. The upper die assembly includes an upper die base, an upper backing plate, an upper clamping plate, a stop plate, and an upper ejector plate. The lower die assembly includes a lower die base, a lower backing plate, and a lower template. The upper die assembly and the lower die assembly are arranged sequentially along the feeding direction.
[0006] The first station is used to cut out the outlines of the vertical parts on both sides of the contact blade and the horizontal part on one side, and to bend the connection between the three parts vertically.
[0007] The second station is used to bend the vertical part on the side connected to the material strip perpendicular to the plane of the material strip;
[0008] The third station is used to bend and fit the vertical parts on both sides together. The second station includes a floating block that can slide up and down on the lower template, a first insert on the upper release plate, a first bending punch that slides on the first insert, and a first push block on the upper clamping plate. A second spring is provided on the side of the first insert. One end of the second spring is connected to the first insert, and the other end is connected to the first bending punch. When the upper mold assembly moves down, the first push block pushes the first bending punch to move towards the floating block, clamping the vertical parts on both sides.
[0009] The fourth station is used to process the mounting holes on the vertical section;
[0010] The fifth station is used to cut out the outline of the horizontal part on the other side, and the shaped part is separated from the material strip.
[0011] As a further improvement, the first insert is provided with a groove, and steps are provided on both sides of the groove, and the first bending punch slides in the groove.
[0012] As a further improvement, the float includes an abutting part and a sliding part. The sliding part slides with the lower template and has a first spring at its bottom. The bottom of the first spring abuts with the lower pad plate. The upper release plate has a clearance hole that cooperates with the float.
[0013] As a further improvement, a fixing strip is provided on the lower end face of the first insert, and the fixing strip is detachably connected to the lower end face of the upper release plate.
[0014] As a further improvement, the lower template is provided with several guide pins arranged in two rows. The guide pins can slide up and down, and a third spring is provided at the bottom of the guide pin. The third spring is located inside the lower mold base, and a groove is provided on the guide pin.
[0015] As a further improvement, a punching station is provided near the feeding side of the first station. The punching station includes two positioning hole punches on the upper clamping plate. When the upper mold assembly moves downward, the positioning hole punches pass through the stop plate and the upper stripping plate and punch positioning holes on both sides of the strip. Furthermore, a number of positioning pins arranged in two rows are provided on the lower end face of the upper stripping plate. When the upper stripping plate moves downward, the positioning pins are inserted into the positioning holes.
[0016] As a further improvement, the fifth station includes a fourth cutting punch set on the upper clamping plate, a material discharge channel is provided on the lower template, and a material discharge stop is provided on the side of the material discharge channel.
[0017] The beneficial effects of this utility model are:
[0018] By setting a first bending punch and a float to clamp the vertical part of the contact knife, the first bending punch can retract during mold parting, widening the gap of the mold cavity and ensuring that the contact knife is not crushed during the pressing down of the upper mold assembly. When the mold is fully closed, the contact knife can be clamped, thereby producing parts with qualified dimensions. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the contact blade structure.
[0021] Figure 2 This is a schematic diagram of the overall structure provided by this utility model.
[0022] Figure 3 This is a schematic diagram of the upper mold assembly structure provided by this utility model.
[0023] Figure 4 This is a schematic diagram of the lower mold assembly structure provided by this utility model.
[0024] Figure 5 This is a schematic diagram of the third workstation structure provided by this utility model.
[0025] Figure 6 This is a schematic diagram of the third workstation structure provided by this utility model.
[0026] Figure 7 This is a schematic diagram of the fourth workstation structure provided by this utility model.
[0027] Figure label:
[0028] 1a. Vertical part; 2a. Horizontal part;
[0029] 1. First station; 11. First trimming punch; 12. Second trimming punch; 13. Third trimming punch; 14. Second bending punch; 15. Third bending punch; 2. Second station; 21. Third insert; 3. Third station; 31. First push block; 32. Floating block; 33. First insert; 34. First bending punch; 35. Protective cavity; 4. Fourth station; 41. Second push block; 42. Fourth insert; 43. Punching block ; 44. Fifth insert; 45. Scrap channel; 5. Fifth station; 51. Fourth cutting punch; 52. Blanking stop; 6. Upper die assembly; 61. Upper die base; 62. Upper backing plate; 63. Upper clamping plate; 64. Stop plate; 65. Upper stripping plate; 651. Positioning pin; 652. Fixing strip; 7. Lower die assembly; 71. Lower template; 72. Lower backing plate; 73. Lower die base; 8. Strip; 9. Positioning hole punch; 10. Guide pin. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.
[0031] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0032] Reference Figure 2-7 As shown, a continuous stamping die for a contact knife includes an upper die assembly 6 and a lower die assembly 7. During processing, the die is installed on a stamping equipment, and the feed strip 8 is pushed by an external feeder. The upper die assembly 6 includes an upper die base 61, an upper pad 62, an upper clamping plate 63, a stop plate 64, and an upper stripper plate 65. The lower die assembly 7 includes a lower die base 73, a lower pad 72, and a lower template 71.
[0033] The upper mold assembly 6 and the lower mold assembly 7 are provided sequentially along the feeding direction as follows:
[0034] The first station 1 is used to cut out the outlines of the vertical parts on both sides of the contact knife and the horizontal part on one side, and to bend the connection between the three parts vertically.
[0035] The second station 2 is used to bend the vertical part on the side connected to the material strip 8 perpendicular to the plane of the material strip 8;
[0036] The third station 3 is used to bend and fit the vertical parts on both sides together. The second station 2 includes a floating block 32 that can slide up and down on the lower template 71, a first insert 33 on the upper release plate 65, a first bending punch 34 that slides inside the first insert 33, and a first push block 31 on the upper clamping plate 63. The lower end face of the first push block 31 passes through the stop plate 64. When the upper mold assembly 6 moves down, the first push block 31 pushes the first bending punch 34 to move towards the floating block 32, clamping the vertical parts on both sides. A second spring is provided on the side of the first insert 33. One end of the second spring is connected to the first insert 33, and the other end is connected to the first bending punch 34. When the mold is separated, the first push block 31 moves upward, and the second spring pushes the first bending punch 34 to slide away from the floating block 32. The first bending punch 34 moves away from the floating block 32, and a protective cavity 35 with variable gap is formed between the two.
[0037] Station 4 is used to process the mounting holes on the vertical section;
[0038] The fifth station 5 is used to cut out the outline of the horizontal part on the other side, and the shaped part is separated from the material strip 8.
[0039] The advantage of adopting the above technical solution is that by setting the first bending punch 34 and the float 32 to clamp the vertical part of the contact knife, the first bending punch 34 can retract during mold separation, enlarging the gap of the protective cavity 35, ensuring that the contact knife is not crushed during the process of the upper mold assembly 6 pressing down again, and clamping the contact knife when the mold is fully closed, thereby producing parts with qualified dimensions.
[0040] In some embodiments, a groove is provided in the first insert 33, and steps are provided on both sides of the groove. The first bending punch slides within the groove. The advantage of the above technical solution is that the steps on both sides of the groove cooperate with the first bending punch to restrict its position, allowing it to slide linearly within the groove.
[0041] In some embodiments, the float 32 includes an abutting portion and a sliding portion, with an inverted L-shaped outer contour. The sliding portion slides with the lower template 71 and has a first spring at its bottom. The bottom of the first spring abuts against the lower pad 72. The upper ejector plate 65 has clearance holes that cooperate with the float 32. The advantage of the above technical solution is that it facilitates the feeding of the strip 8. When the mold is opened, the spring lifts the float 32, and when the mold is closed, the stop plate 64 presses the float 32 down, so that the abutting portion cooperates with the first bending punch 34 to clamp the vertical portions on both sides of the contact knife.
[0042] In some embodiments, a fixing strip 652 is provided on the lower end face of the first insert 33, and the fixing strip 652 is detachably connected to the lower end face of the upper release plate 65. The advantage of adopting the above technical solution is that it makes the installation and positioning of the first insert 33 more accurate.
[0043] In some embodiments, the lower template 71 is provided with a plurality of guide pins 10 arranged in two rows. The guide pins 10 can slide up and down, and a third spring is provided at the bottom of the guide pin 10. The third spring is located in the lower mold base 73, and a groove is provided on the guide pin 10. The advantage of the above technical solution is that the guide pins 10 are arranged in two rows, the strip 8 slides in the grooves of the guide pins 10 on both sides, and the strip 8 moves up and down with the guide pins 10, which facilitates the separation of the strip 8 from the upper surface of the lower template 71 and provides positioning on both sides of the strip 8.
[0044] In some embodiments, a punching station is provided near the feeding side of the first station 1. The punching station includes two positioning punches 9 on the upper clamping plate 63. When the upper die assembly 6 moves downward, the positioning punches 9 pass through the stop plate 64 and the upper ejector plate 65, punching positioning holes on both sides of the strip 8. The strip 8 is continuously fed and the die is closed multiple times, forming two rows of continuous positioning holes. Furthermore, a plurality of positioning pins 651 arranged in two rows are provided on the lower end face of the upper ejector plate 65. When the upper ejector plate 65 moves downward, the positioning pins 651 are inserted into the positioning holes. The advantage of adopting the above technical solution is that it makes the feeding amount of the strip 8 consistent each time, the positioning more accurate, and facilitates stamping.
[0045] In some embodiments, the first station 1 may adopt the following structural scheme: the first station 1 includes a first cutting punch 11, a second cutting punch 12, a third cutting punch 13, a second bending punch 14, and a third bending punch 15 sequentially arranged on the upper clamping plate 63 along the feeding direction, and also includes a second insert arranged on the lower template 71. The advantage of adopting the above technical solution is that the first cutting punch 11, the second cutting punch 12, and the third cutting punch 13 respectively cut out the contours of the vertical portions on both sides of the cutter and the horizontal portion on one side, avoiding excessive length in a single cut that could cause deformation of the material strip 8 edge. During mold closing, the second insert first bends the horizontal portion upwards, and then the second bending punch 14 and the third bending punch 15 bend the connection between the two vertical portions in stages, avoiding excessive bending in a single operation that could cause material breakage.
[0046] In some embodiments, the second station 2 may adopt the following structural scheme: the lower template 71 is provided with a plurality of third inserts 21, so that the vertical part on the side connected to the strip 8 is repeatedly punched and bent perpendicular to the plane of the strip 8, and the included angle between the two vertical parts is reduced. The advantage of adopting the above technical solution is that the multiple punching and bending avoids breakage caused by excessive bending angle in a single bend.
[0047] In some embodiments, the fourth station 4 may adopt the following structural scheme: the fourth station 4 includes a fourth insert 42 and a fifth insert 44 disposed on the upper ejector plate 65, and a punching block 43 sliding on the fourth insert 42. A cavity for accommodating the vertical part of the contact knife is left between the fourth insert 42 and the fifth insert 44. When the upper mold assembly 6 moves downward, the second pusher 41 disposed on the upper ejector plate 65 pushes the punching block 43 toward the fifth insert 44 to punch out the mounting hole on the vertical part, while the waste material is sucked away along the waste material channel 45 formed in the fifth insert 44, the stop plate 64, the upper pad plate 62, and the upper mold base 61. The advantage of adopting the above technical solution is that the material discharge of the mounting hole is convenient, and the mounting hole positioning is more accurate after the two vertical parts are attached.
[0048] In some embodiments, the fifth station 5 may adopt the following structural scheme: the fifth station 5 includes a fourth cutting punch 51 disposed on the upper clamping plate 63, a material discharge channel provided on the lower template 71, and a material discharge block 52 provided on the side of the material discharge channel. The advantage of adopting the above technical solution is that the material discharge block 52 can better allow the separated contact blades to discharge.
[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A continuous stamping die for a stylus knife, comprising an upper die assembly (6) and a lower die assembly (7), wherein the upper die assembly (6) includes an upper die base (61), an upper pad (62), an upper clamping plate (63), a stop plate (64), and an upper ejector plate (65), and the lower die assembly (7) includes a lower die base (73), a lower pad (72), and a lower template (71), characterized in that: The upper mold assembly (6) and the lower mold assembly (7) are arranged sequentially along the feeding direction. The first station (1) is used to cut out the outlines of the vertical parts on both sides of the contact knife and the horizontal part on one side, and to bend the connection between the three vertically. The second station (2) is used to bend the vertical part on the side connected to the strip (8) perpendicular to the plane of the strip (8); The third station (3) is used to bend and fit the vertical parts on both sides together. The second station (2) includes a floating block (32) that can slide up and down on the lower template (71), a first insert (33) on the upper release plate (65), a first bending punch (34) that slides on the first insert (33), and a first push block (31) on the upper clamping plate (63). A second spring is provided on the side of the first insert (33). One end of the second spring is connected to the first insert (33), and the other end is connected to the first bending punch (34). When the upper mold assembly (6) moves down, the first push block (31) pushes the first bending punch (34) to move towards the floating block (32) to clamp the vertical parts on both sides. The fourth station (4) is used to process the mounting holes on the vertical part; The fifth station (5) is used to cut out the outline of the horizontal part on the other side and separate the formed part from the strip (8).
2. The continuous stamping die for a contact blade according to claim 1, characterized in that, The first insert (33) has a groove, and steps are provided on both sides of the groove. The first bending punch (34) slides in the groove.
3. The continuous stamping die for a contact blade according to claim 2, characterized in that, The float (32) includes an abutting part and a sliding part. The sliding part slides with the lower template (71) and has a first spring at its bottom. The bottom of the first spring abuts with the lower pad (72). The upper release plate (65) has a clearance hole that cooperates with the float (32).
4. A continuous stamping die for a contact blade according to claim 3, characterized in that, The lower end face of the first insert (33) is provided with a fixing strip (652), and the fixing strip (652) is detachably connected to the lower end face of the upper release plate (65).
5. A continuous stamping die for a contact blade according to claim 1, characterized in that, The lower template (71) is provided with several guide pins (10) arranged in two rows. The guide pins (10) can slide up and down, and the bottom of the guide pin (10) is provided with a third spring. The third spring is located in the lower mold base (73), and the guide pin (10) is provided with a groove.
6. The continuous stamping die for a contact blade according to claim 1, characterized in that, A punching station is also provided near the feeding side of the first station (1). The punching station includes two positioning hole punches (9) on the upper clamping plate (63). When the upper mold assembly (6) moves downward, the positioning hole punches (9) pass through the stop plate (64) and the upper stripping plate (65) to punch positioning holes on both sides of the strip (8). A number of positioning pins (651) arranged in two rows are also provided on the lower end face of the upper stripping plate (65). When the upper stripping plate (65) moves downward, the positioning pins (651) are inserted into the positioning holes.
7. A continuous stamping die for a contact blade according to claim 1, characterized in that, The fifth station (5) includes a fourth cutting punch (51) set on the upper clamping plate (63), a material dropping channel is provided on the lower template (71), and a material dropping block (52) is provided on the side of the material dropping channel.