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CN-122007309-A - Accurate cold forging mould of children's handcart spare part

CN122007309ACN 122007309 ACN122007309 ACN 122007309ACN-122007309-A

Abstract

The invention discloses a precision cold forging die for a part of a trolley for children, which belongs to the field of cold forging dies and comprises a lower die and an upper die which is arranged opposite to the lower die, wherein a double-buffering cold forging assembly is arranged between the lower die and the upper die. The double-buffering cold forging component specifically comprises a fixed seat fixed on the top end face of a lower die, a groove is formed in the middle position of the side face of the fixed seat, a limit groove is formed in the bottom end face of the groove, limit seats are symmetrically and movably connected to two sides of the inside of the limit groove, an adjusting piece is arranged between each limit seat and the corresponding fixed seat, a bearing seat is arranged between each two limit seats, a lower buffering mechanism is arranged below each bearing seat, a rectangular plate is arranged above the fixed seat, an upper buffering mechanism is arranged between each rectangular plate and the corresponding upper die, and a pressing plate and a pressing block are embedded in the middle position inside each rectangular plate. The invention can effectively buffer die closing impact, improve forming stability and part precision and prolong the service life of the die.

Inventors

  • DING NING
  • FU YINGLONG

Assignees

  • 东莞市豫哲信五金塑胶制品有限公司

Dates

Publication Date
20260512
Application Date
20251223

Claims (9)

  1. 1. The utility model provides a accurate cold forging mould of children's handcart spare part which characterized in that includes: A lower die (1) and an upper die (9) arranged opposite to the lower die (1), Wherein a double buffer cold forging component is arranged between the lower die (1) and the upper die (9); The double-buffering cold forging component specifically comprises a fixed seat (3) fixed on the top end face of a lower die (1), a groove (4) is formed in the middle position of the side face of the fixed seat (3), a limit groove (5) is formed in the bottom end face of the groove (4), limit seats (6) are symmetrically and movably connected to the two sides of the inside of the limit groove (5), an adjusting piece is arranged between the limit seats (6) and the fixed seat (3), a bearing seat (25) is arranged between the two limit seats (6), and a lower buffering mechanism is arranged below the bearing seat (25).
  2. 2. The precision cold forging die for the parts of the children trolley according to claim 1, wherein a rectangular plate (14) is arranged above the fixed seat (3), an upper buffer mechanism is arranged between the rectangular plate (14) and the upper die (9), a pressing plate (21) and a pressing block (22) are embedded in the middle position inside the rectangular plate (14), and a gap is reserved between the pressing plate (21) and the pressing block (22) and corresponds to a bearing seat (25) below.
  3. 3. The precise cold forging die for the parts of the children trolley according to claim 2, wherein the upper buffer mechanism comprises four shaft rods (15) which are distributed in a rectangular shape and fixed on the top end face of a rectangular plate (14), shaft holes (17) are formed in positions, corresponding to the shaft rods (15), of the top ends of the upper dies (9), shaft holes (17) are formed in the tops of the shaft rods (15) in a penetrating mode, anti-falling heads (18) are fixedly connected with the top ends of the shaft rods (15), clamping grooves (16) matched with the anti-falling heads (18) are formed in the top end openings of the shaft holes (17), strip grooves (24) are formed in positions, corresponding to pressing plates (21), of the bottom ends of the upper dies (9), and limiting blocks (23) are fixedly connected to the top end faces of the pressing blocks (22).
  4. 4. A precision cold forging die for parts of a children handcart according to claim 3, wherein a positioning guide rod (27) is embedded in the middle of the top end surface of the bearing seat (25), a positioning guide hole (28) is formed in the bottom end of the pressing block (22) corresponding to the positioning guide rod (27), and a conical opening (29) is formed in the bottom end opening of the positioning guide hole (28).
  5. 5. The precise cold forging die for the parts of the children trolley according to claim 4, wherein the lower buffer mechanism comprises four vertical rods (26) which are distributed in a rectangular shape and fixed on the bottom end face of the bearing seat (25), the bottom ends of the vertical rods (26) penetrate through the lower die (1) and are fixedly connected with the base (30), spring columns (31) are sleeved below the outer side faces of the vertical rods (26), the top ends of the spring columns (31) are fixedly connected with the lower die (1), and the bottom ends of the spring columns (31) are fixedly connected with the base (30).
  6. 6. The precision cold forging die for the parts of the children trolley according to claim 5, wherein supporting seats (2) are symmetrically and fixedly connected to two sides of the bottom end surface of the lower die (1), a notch is formed between the lower die (1) and the two supporting seats (2), and the notch provides a space for a vertical rod (26) to move downwards.
  7. 7. The precise cold forging die for the parts of the children trolley according to claim 6, wherein the adjusting piece comprises a vertical groove (20) formed in the limiting seat (6), a rotating head (19) matched with the vertical groove is movably connected in the vertical groove (20), a threaded rod (7) is fixedly connected to one side surface, far away from the bearing seat (25), of the rotating head (19), one end of the threaded rod (7) penetrates through the limiting seat (6) and the fixing seat (3) and is fixedly connected with a handle (8), and the threaded rod (7) is in threaded connection with the fixing seat (3).
  8. 8. The precision cold forging die for the parts of the children trolley according to claim 7, wherein round holes (10) are formed in two sides of the top end face of the upper die (9), a sleeve (11) is fixedly connected to the lower portion of the inside of each round hole (10), an optical axis (12) matched with the sleeve is movably connected to the inside of each sleeve (11), and the bottom end of each optical axis (12) is fixedly connected with the lower die (1).
  9. 9. The precision cold forging die for the parts of the children trolley according to claim 8, wherein a connector (13) is fixedly connected to the center of the top end face of the upper die (9), and the top end of the connector (13) is connected with external pressing equipment.

Description

Accurate cold forging mould of children's handcart spare part Technical Field The invention relates to the field of cold forging dies, in particular to a precise cold forging die for parts of a children handcart. Background The cold forging process is a precision manufacturing technique for obtaining parts of desired shape, size and performance by applying pressure to a metal blank at room temperature to cause plastic deformation in a mold cavity. The process has the advantages of high material utilization rate, high production efficiency, good mechanical property, high dimensional accuracy and the like, and is very suitable for mass production of various high-strength and complex-shape metal structural members required by the children handcart. However, in the cold forging dies of the prior art, particularly for forming parts with complicated cross sections or requiring high dimensional consistency, such as Z-shaped connectors for hand trucks, there are generally problems of 1, large impact load and short die life, and that at the moment of closing the dies, the upper and lower dies collide at high speed to generate a great impact force, which easily causes microcracks or crushing of the die working parts (such as the forming cavity of the lower die and the punch of the upper die), and reduces the die service life. 2. The precision and consistency of the product are difficult to ensure, and simple rigid die assembly is easy to generate slight vibration or deflection under impact, which may cause insufficient part formation, over-tolerance in size or flash and burr generation, and influence the assembly precision and appearance quality of the product. 3. Residual stress and rebound control are poor, namely, after forming is finished, if the force unloading process is abrupt, the formed part may deform due to elastic rebound, or larger internal stress remains, so that the fatigue strength and the use safety of the part are affected. Accordingly, there is a need for a cold forging die that can effectively cushion die closing impact, improve forming stability and part accuracy, and thereby extend die life. Therefore, a precise cold forging die for parts of the children handcart is provided by a person skilled in the art to solve the problems in the background art. Disclosure of Invention The invention aims to provide a precision cold forging die for parts of a children handcart, which can effectively buffer die closing impact, improve forming stability and part precision, prolong the service life of the die and solve the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: a precision cold forging die for parts of a children handcart, comprising: A lower die and an upper die arranged opposite to the lower die, Wherein, be equipped with dual buffering cold forging subassembly between lower mould and the last mould. The double-buffering cold forging component comprises a fixed seat fixed on the top end face of a lower die, a groove is formed in the middle position of the side face of the fixed seat, a limit groove is formed in the bottom end face of the groove, limit seats are symmetrically and movably connected to two sides of the inside of the limit groove, an adjusting piece is arranged between the limit seats and the fixed seat, a bearing seat is arranged between the two limit seats, a lower buffering mechanism is arranged below the bearing seat, a rectangular plate is arranged above the fixed seat, an upper buffering mechanism is arranged between the rectangular plate and an upper die, a pressing plate and a pressing block are embedded in the middle position inside the rectangular plate, a gap is formed between the pressing plate and the pressing block, and the pressing plate corresponds to the bearing seat below the pressing block up and down. The upper buffer mechanism comprises four shaft rods which are distributed in a rectangular shape and fixed on the top end face of a rectangular plate, a shaft hole is formed in the position, corresponding to the shaft rod, of the top end face of the upper die, the top end of the shaft rod penetrates through the shaft hole and is fixedly connected with an anti-drop head, a clamping groove matched with the anti-drop head is formed in the opening of the top end of the shaft hole, a strip-shaped groove is formed in the position, corresponding to the pressing plate, of the bottom end face of the upper die, and a limiting block is fixedly connected to the top end face of the pressing block. As a still further proposal of the invention, a positioning guide rod is embedded in the middle position of the top end surface of the bearing seat, a positioning guide hole is arranged at the bottom end surface of the pressing block corresponding to the positioning guide rod, and a conical opening is arranged at the bottom end opening of the positioning guide hole. The lower buffer mechanism com