A metal bar grooving die

Abstract

The utility model discloses a kind of metal bar pressure groove moulds, including upper die and lower die, upper die operating surface is equipped with upper die recess, lower die operating surface is equipped with lower die recess, upper die recess and lower die recess are oppositely arranged to form the stamping station of containing metal bar;Upper die is detachably installed with upper die insert in inside, lower die is detachably installed with lower die insert in inside, and the operating end of upper die insert and lower die insert respectively extends to the outside of upper die recess and lower die recess;When upper die and lower die close mould, the operating end of upper die insert and lower die insert acts on metal bar shaft body, to press out axially symmetrical notch. By upper die recess and lower die recess form the counter-striking station, ensure that bar keeps axial stability in stamping process, effectively avoid the radial deviation problem generated by traditional single side stamping, make notch forming position tolerance control in effective range. Upper and lower die inserts adopt detachably mounted mode, realize the quick replacement of core forming component.

Description

Technical Field

[0001] This utility model relates to the field of stamping die manufacturing technology, specifically a metal bar groove pressing die. Background Technology

[0002] In the field of metal bar processing, groove pressing is a key process involved in the manufacturing of transmission components and connectors. Traditional groove pressing dies mainly suffer from the following technical defects: 1. Insufficient positioning stability: When existing single-sided stamping dies are in operation, the rod material will experience radial displacement due to unidirectional force.

[0003] 2. Poor mold adaptability: When facing the processing needs of bars with different diameter specifications, traditional integral molds need to be completely replaced or returned to the factory for modification.

[0004] 3. Core components cannot be replaced: The forming parts of the existing mold are made using an integral casting process. When the local working surface is worn, the entire mold must be scrapped.

[0005] The aforementioned technical defects have led to technical bottlenecks in existing grooving molds, such as unstable processing accuracy and high mold modification costs. There is an urgent need to develop new mold structures to overcome these industry technical bottlenecks. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a metal bar grooving mold that ensures the bar remains axially stable during stamping, effectively avoids the radial offset problem caused by traditional unilateral stamping, and enables rapid replacement of core forming components.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A metal bar grooving die includes an upper die and a lower die. The working surface of the upper die has an upper die groove, and the working surface of the lower die has a lower die groove. The upper die groove and the lower die groove are arranged opposite to each other to form a stamping station for accommodating the metal bar. An upper die insert is detachably installed inside the upper die, and a lower die insert is detachably installed inside the lower die. The working ends of the upper die insert and the lower die insert extend to the outside of the upper die groove and the lower die groove, respectively. When the upper die and the lower die are closed, the working ends of the upper die insert and the lower die insert act on the shaft of the metal bar to press out axially symmetrical grooves.

[0008] Furthermore, both the upper and lower mold grooves are semi-circular grooves, and the working ends of the upper and lower mold inserts are respectively provided with semi-circular slots, the diameter of which is smaller than the diameter of the semi-circular groove.

[0009] Furthermore, the upper mold includes an upper mold top plate, an upper mold middle plate, an upper mold clamping plate one, and an upper mold clamping plate two arranged sequentially from top to bottom; the upper mold middle plate, the upper mold clamping plate one, and the upper mold clamping plate two are connected to guide pillars, one end of the guide pillar is embedded inside the upper mold middle plate, and the other end passes through the upper mold clamping plate one and the upper mold clamping plate two in sequence and extends outward.

[0010] Furthermore, two sets of upper mold connecting blocks are symmetrically arranged on the upper part of the upper mold top plate. The two sets of upper mold connecting blocks are connected to the oil rod connecting column. The upper mold connecting block has a "﹁" shaped cross section and a locking protrusion on its inner side. The lower section of the oil rod connecting column has a locking groove on its outer side that matches the locking protrusion. The lower section of the oil rod connecting column also has a flat cut surface on its outer side.

[0011] Furthermore, the upper mold insert is located inside the upper mold clamping plate 2, and its cross-section is a "T" shaped structure. The abutting part of the upper mold insert is located in the bottom groove of the upper mold clamping plate 1, and the extension part of the upper mold insert penetrates the upper mold clamping plate 2 and extends to the outside of the outer upper mold groove.

[0012] Furthermore, the lower mold includes a lower mold base, a lower mold bottom plate, a lower mold middle plate, and a lower mold clamping plate arranged sequentially from bottom to top; the lower mold bottom plate, the lower mold middle plate, and the lower mold clamping plate are all provided with guide sleeves that cooperate with guide pillars; the lower mold clamping plate is provided with an axially movable ejector pin, the ejector end of which passes through the lower mold clamping plate and extends to the outside of the lower mold groove, and the other end abuts against a return spring provided in the lower mold middle plate; the other end of the return spring abuts against a connecting pin; the connecting pin passes through the lower mold bottom plate, and its end forms a limiting abutment with the lower mold base.

[0013] Furthermore, the lower mold insert is located inside the lower mold clamping plate, and its cross-section is a "T" shaped structure. The abutting part of the lower mold insert is located in the top groove of the lower mold middle plate, and the extension part of the lower mold insert penetrates the lower mold clamping plate and extends to the outside of the lower mold groove.

[0014] Furthermore, an auxiliary insert is detachably installed between the upper die and the lower die. The upper end of the auxiliary insert passes through the second upper die clamping plate and extends to the first upper die clamping plate. The lower end of the auxiliary insert passes through the lower die clamping plate and extends to the middle plate of the lower die. The auxiliary insert has a through hole, and the through hole is on the same axis as the stamping station.

[0015] Compared with existing technologies, it has the following advantages: 1. This utility model provides a metal bar grooving mold. The upper and lower die grooves form a counter-punching station, ensuring axial stability of the bar during stamping and effectively avoiding the radial offset problem caused by traditional single-sided stamping. This keeps the groove forming position tolerance within an effective range. The upper and lower die inserts are detachably installed, enabling rapid replacement of the core forming components. When processing bars of different diameters, only the corresponding inserts need to be replaced to complete the mold modification, shortening the modification time compared to traditional integral molds and extending the service life of the mold body.

[0016] 2. By adding auxiliary inserts, which have through holes on the same axis as the stamping station, a dual positioning guarantee mechanism is formed to further position the bar stock and prevent it from deviating. This is especially suitable for the processing of high-precision shaft parts. Attached Figure Description

[0017] Figure 1 The diagram shown is an assembly structure diagram of a metal bar grooving mold. Figure 2 The diagram shown is a cross-sectional view of a metal bar grooving mold. Figure 3 The diagram shown is of the upper mold structure. Figure 4 The image shown is an exploded view of the upper mold structure. Figure 5 The diagram shown is of the lower mold structure. Figure 6 The image shown is an exploded view of the lower mold. Figure 7 The diagram shown is of the lower mold insert structure.

[0018] In the diagram: 1. Upper mold; 2. Lower mold; 3. Upper mold groove; 4. Lower mold groove; 5. Oil rod connecting post; 6. Ejector pin; 7. Return spring; 8. Connecting pin; 9. Auxiliary insert; 10. Upper mold insert; 11. Upper mold top plate; 12. Upper mold middle plate; 13. Upper mold clamping plate one; 14. Upper mold clamping plate two; 15. Guide post; 16. Upper mold connecting block; 20. Lower mold insert; 21. Lower mold base; 22. Lower mold bottom plate; 23. Lower mold middle plate; 24. Lower mold clamping plate; 51. Slot; 52. Flat cut surface; 91. Through hole; 100. Semicircular groove; 161. Slot protrusion; 200. Semicircular groove. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1 to 7 This utility model provides a technical solution: a metal rod grooving die, including an upper die 1 and a lower die 2. The working surface of the upper die 1 is provided with an upper die groove 3, and the working surface of the lower die 2 is provided with a lower die groove 4. The upper die groove 3 and the lower die groove 4 are arranged opposite to each other to form a stamping station for accommodating the metal rod. An upper die insert 10 is detachably installed inside the upper die 1, and a lower die insert 20 is detachably installed inside the lower die 2. The working ends of the upper die insert 10 and the lower die insert 20 extend to the outside of the upper die groove 3 and the lower die groove 4, respectively. When the upper die 1 and the lower die 2 are closed, the working ends of the upper die insert 10 and the lower die insert 20 act on the shaft of the metal rod to press out an axially symmetrical groove. By forming a counter-clamping station with the upper die groove 3 and the lower die groove 4, the axial stability of the rod is ensured during the stamping process, effectively avoiding the radial offset problem caused by traditional single-sided stamping, and keeping the groove forming position tolerance within an effective range. The upper and lower mold inserts are detachably installed, enabling quick replacement of core forming components. When processing bars of different diameters, only the corresponding inserts need to be replaced to complete the mold modification, which shortens the modification time compared to traditional integral molds and extends the service life of the mold body.

[0021] Please see Figure 3 , Figure 5 The upper mold groove 3 and the lower mold groove 4 of this grooving mold are both semi-circular grooves, which can be designed into other geometric shapes according to the shape of the part to be stamped. The working ends of the upper mold insert 10 and the lower mold insert 20 are respectively provided with semi-circular grooves 100 and 200. The diameter of the semi-circular grooves 100 and 200 is smaller than the diameter of the semi-circular groove, which can be changed according to the actual shape to be pressed. The metal rod is iron.

[0022] Please see Figure 2 , Figure 4 The upper mold 1 includes, from top to bottom, an upper mold top plate 11, an upper mold middle plate 12, an upper mold clamping plate one 13, and an upper mold clamping plate two 14. Guide pillars 15 are connected to the upper mold middle plate 12, upper mold clamping plate one 13, and upper mold clamping plate two 14. One end of the guide pillar 15 is embedded inside the upper mold middle plate 12, and the other end passes through the upper mold clamping plate one 13 and upper mold clamping plate two 14 and extends outward. The upper mold adopts a multi-layer plate combination design, which maintains the overall structural strength while dispersing stress. The guide pillars 15 guide the vertical movement of the mold, ensuring precise mold alignment and ensuring the accuracy and stability of mold closing and opening. Two sets of upper mold connecting blocks 16 are symmetrically arranged on the upper part of the upper mold top plate 11. The two sets of upper mold connecting blocks 16 are connected to the oil rod connecting column 5. The upper mold connecting block 16 has a "﹁" shaped cross-section, with a locking protrusion 161 on its inner side. The lower outer side of the oil rod connecting column 5 has a locking groove 51 that matches the locking protrusion 161, and the lower outer side of the oil rod connecting column 5 also has a flat surface 52. The locking protrusion 161 and the locking groove 51 form an axial fitting structure, which, together with the anti-rotation structure of the flat surface 52, enables the rapid positioning and installation of the oil rod connecting column 5 and the upper mold 1, effectively avoiding the problem of loosening of the connection caused by long-term use.

[0023] Please see Figures 2-3 The upper die insert 10 is located inside the upper die clamping plate 14, and its cross-section is T-shaped. The abutting part of the upper die insert 10 is located in the bottom groove of the upper die clamping plate 13, and the extension part of the upper die insert 10 passes through the upper die clamping plate 14 and extends to the outside of the outer upper die groove 3. Through the dual-stage limiting design of the abutting part and the extension part, it is ensured that the impact force borne by the insert during the stamping process is evenly transmitted to the die body. This structure can control the displacement of the insert within 0.02mm, which significantly improves the positional repeatability accuracy of the groove forming.

[0024] Please see Figure 2 , Figure 5 The lower mold 2 includes a lower mold base 21, a lower mold bottom plate 22, a lower mold middle plate 23, and a lower mold clamping plate 24 arranged sequentially from bottom to top. The lower mold bottom plate 22, the lower mold middle plate 23, and the lower mold clamping plate 24 are all provided with guide sleeves that cooperate with the guide post 15. The lower mold clamping plate 24 is provided with an axially movable ejector pin 6. Its ejector end passes through the lower mold clamping plate 24 and extends to the outside of the lower mold groove 4. The other end abuts against a return spring 7 provided in the lower mold middle plate 23. The other end of the return spring 7 abuts against a connecting pin 8. The connecting pin 8 passes through the lower mold bottom plate 22, and its end forms a limiting abutment with the lower mold base 21. The design of ejector pin 6 in conjunction with return spring 7 allows the molded part to be automatically ejected at the moment the mold opens. It should be noted that when the lower mold insert clamps the metal rod to press out the circular groove, the lower mold insert will clamp the metal rod. Therefore, the ejector pin 6 lifts the metal rod, which increases the production efficiency by 40% compared with the traditional manual part removal method and eliminates the safety hazards of manual part removal.

[0025] It should be noted that the upper mold insert 10 and the lower mold insert 20 are made of alloy material, which is harder than the metal rod being processed, so that the metal rod can be pressed into the groove better during the processing.

[0026] Please see Figure 2 , Figure 5 , Figure 7The lower die insert 20 is located inside the lower die clamping plate 24, and its cross-section is T-shaped. The abutting part of the lower die insert 20 is located in the top groove of the lower die middle plate 23, and the extension part of the lower die insert 20 passes through the lower die clamping plate 24 and extends to the outside of the lower die groove 4. Through the dual-stage limiting design of the abutting part and the extension part, it is ensured that the impact force borne by the insert during the stamping process is evenly transmitted to the die body. This structure can control the displacement of the insert within 0.02mm, which significantly improves the positional repeatability accuracy of the groove forming.

[0027] Please see Figure 2 , Figures 5-6 An auxiliary insert 9 is detachably installed between the upper die and the lower die 2. The upper end of the auxiliary insert 9 passes through the upper die clamping plate 2 14 and extends to the upper die clamping plate 1 13. The lower end of the auxiliary insert 9 passes through the lower die clamping plate 24 and extends to the lower die middle plate 23. The auxiliary insert 9 has a through hole 91, which is on the same axis as the stamping station. By adding the auxiliary insert 9, and the auxiliary insert 9 having a through hole 91 on the same axis as the stamping station, a dual positioning guarantee mechanism is formed, which further positions the bar stock and prevents the bar stock from deviating. It is particularly suitable for the processing of high-precision shaft parts.

[0028] Working Principle: Upon starting the stamping machine, the upper die 1 moves downwards via the hydraulic rod connecting column 5, performing a stamping action. When the upper die 1 and lower die 2 close, the working ends of the upper die insert 10 and lower die insert 20 act on the metal rod shaft to press out axially symmetrical grooves. The upper die groove 3 and lower die groove 4 form a counter-punching station, ensuring the rod remains axially stable during stamping, effectively avoiding the radial offset problem caused by traditional single-sided stamping, and keeping the groove forming position tolerance within an effective range. The upper and lower die inserts are detachably installed, enabling rapid replacement of core forming components. When processing rods of different diameters, only the corresponding inserts need to be replaced to complete the die modification.

Claims

1. A groove pressing die for metal bars, comprising an upper die (1) and a lower die (2), characterized in that, The upper die (1) has an upper die groove (3) on its working surface, and the lower die (2) has a lower die groove (4) on its working surface. The upper die groove (3) and the lower die groove (4) are arranged opposite to each other to form a stamping station for accommodating metal rods. An upper die insert (10) is detachably installed inside the upper die (1), and a lower die insert (20) is detachably installed inside the lower die (2). The working ends of the upper die insert (10) and the lower die insert (20) extend to the outside of the upper die groove (3) and the lower die groove (4), respectively. When the upper die (1) and the lower die (2) are closed, the working ends of the upper die insert (10) and the lower die insert (20) act on the shaft of the metal rod to press out axially symmetrical slots.

2. The metal bar grooving mold according to claim 1, characterized in that, The upper mold groove (3) and the lower mold groove (4) are both semi-circular grooves. The working ends of the upper mold insert (10) and the lower mold insert (20) are respectively provided with semi-circular grooves (100, 200). The diameter of the semi-circular grooves (100, 200) is smaller than the diameter of the semi-circular groove.

3. The metal bar grooving mold according to claim 1, characterized in that, The upper mold (1) includes an upper mold top plate (11), an upper mold middle plate (12), an upper mold clamping plate one (13), and an upper mold clamping plate two (14) arranged sequentially from top to bottom; the upper mold middle plate (12), the upper mold clamping plate one (13), and the upper mold clamping plate two (14) are connected to guide posts (15), one end of the guide post (15) is embedded inside the upper mold middle plate (12), and the other end passes through the upper mold clamping plate one (13) and the upper mold clamping plate two (14) in sequence and extends outward.

4. The metal bar grooving mold according to claim 3, characterized in that, The upper part of the upper mold top plate (11) is symmetrically provided with two sets of upper mold connecting blocks (16), and the two sets of upper mold connecting blocks (16) are connected to the oil rod connecting column (5). The upper mold connecting block (16) has a "﹁" shaped cross section and a locking protrusion (161) on its inner side. The lower outer side of the oil rod connecting column (5) is provided with a locking groove (51) that matches the locking protrusion (161). The lower outer side of the oil rod connecting column (5) is also provided with a flat cut surface (52).

5. The metal bar grooving mold according to claim 3, characterized in that, The upper mold insert (10) is located inside the upper mold clamping plate two (14), and its cross-section is a "T" shaped structure. The abutting part of the upper mold insert (10) is located in the bottom groove of the upper mold clamping plate one (13). The extension part of the upper mold insert (10) passes through the upper mold clamping plate two (14) and extends to the outside of the outer upper mold groove (3).

6. The metal bar grooving mold according to claim 1, characterized in that, The lower mold (2) includes a lower mold base (21), a lower mold bottom plate (22), a lower mold middle plate (23), and a lower mold clamping plate (24) arranged sequentially from bottom to top. The lower mold bottom plate (22), the lower mold middle plate (23), and the lower mold clamping plate (24) are all provided with guide sleeves that cooperate with guide pillars (15). The lower mold clamping plate (24) is provided with an axially movable ejector pin (6), the ejector end of which passes through the lower mold clamping plate (24) and extends to the outside of the lower mold groove (4). The other end abuts against a return spring (7) provided in the lower mold middle plate (23). The other end of the return spring (7) abuts against a connecting pin (8). The connecting pin (8) passes through the lower mold bottom plate (22), and its end forms a limiting abutment with the lower mold base (21).

7. The metal bar grooving mold according to claim 6, characterized in that, The lower mold insert (20) is located inside the lower mold clamping plate (24) and has a "T" shaped cross section. The abutting part of the lower mold insert (20) is located in the top groove of the lower mold middle plate (23). The extension part of the lower mold insert (20) passes through the lower mold clamping plate (24) and extends to the outside of the lower mold groove (4).

8. The metal bar grooving mold according to claim 1, characterized in that, An auxiliary insert (9) is detachably installed between the upper mold and the lower mold (2). The upper end of the auxiliary insert (9) passes through the upper mold clamping plate 2 (14) and extends to the upper mold clamping plate 1 (13). The lower end of the auxiliary insert (9) passes through the lower mold clamping plate (24) and extends to the lower mold middle plate (23). The auxiliary insert (9) has a through hole (91). The through hole (91) is on the same axis as the stamping station.

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