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CN-121972597-A - Cold header for bolt preparation

CN121972597ACN 121972597 ACN121972597 ACN 121972597ACN-121972597-A

Abstract

The invention provides a cold header for bolt production, which relates to the technical field of cold header equipment and comprises a frame, an upper die, a first lower die, a second lower die, a middle clamping group and a middle clamping group, wherein the upper die is arranged on the frame in a lifting manner, the first lower die and the second lower die are horizontally and relatively arranged on the frame and are positioned below the upper die, a plurality of die cavities which are sequentially arranged are formed between the upper die, the first lower die and the second lower die when the upper die, the first lower die and the second lower die are in a die clamping state and are in a die separating state when the upper die, the first lower die and the second lower die are in a die clamping state and are used for sequentially upsetting and forming workpieces, the first lower die and the second lower die can be mutually close to and kept in the die clamping state or mutually close to and kept in the die separating state after moving, and the middle clamping group is arranged below the upper die and is positioned above the first lower die and the second lower die and is used for clamping the workpieces to horizontally and linearly move among the plurality of die cavities. According to the cold header provided by the invention, the workpiece is directly clamped by the middle clamping group to move horizontally along a straight line between the die cavities, so that the movement amount of the workpiece in the transferring process is reduced, and the production quantity of bolts in unit time is increased.

Inventors

  • XU ZHENG
  • XU BING
  • XU NING

Assignees

  • 河北鼎润智能装备制造有限公司

Dates

Publication Date
20260505
Application Date
20260403

Claims (10)

  1. 1. The utility model provides a cold heading machine for bolt preparation which characterized in that includes: a frame (100); The upper die (200) is arranged on the frame (100) in a lifting manner; The first lower die (300) and the second lower die (400) are horizontally and relatively arranged on the frame (100) in a moving mode, and are positioned below the upper die (200), the first lower die (300) and the second lower die (400) move to have a die clamping state and a die separating state, and when the die clamping state is achieved, a plurality of die cavities (500) which are sequentially arranged are formed between the die cavities and are used for sequentially upsetting and forming workpieces, and the first lower die (300) and the second lower die (400) can be mutually close to each other and kept in the die clamping state or are mutually close to each other and kept in the die separating state after moving; The middle clamping group (600) is arranged below the upper die (200) and above the first lower die (300) and the second lower die (400), and is used for clamping a workpiece to move horizontally and in a linear direction between a plurality of die cavities (500).
  2. 2. The cold header for bolt production according to claim 1, wherein, The upper die (200) is provided with a first pushing inclined plane (210) and a second pushing inclined plane (220), the first pushing inclined plane (210) and the second pushing inclined plane (220) are oppositely arranged, the first lower die (300) is provided with a first pushed inclined plane (310), the second lower die (400) is provided with a second pushed inclined plane (410), and the first pushed inclined plane (310) and the second pushed inclined plane (410) are oppositely arranged; the first pushing inclined surface (210) is in movable abutting joint with the first pushed inclined surface (310), the second pushing inclined surface (220) is in movable abutting joint with the second pushed inclined surface (410), and the upper die (200) moves downwards to push the first lower die (300) and the second lower die (400) to be close to each other for die assembly.
  3. 3. The cold header for bolt making according to claim 1, further comprising: -a first linear drive (700), the first linear drive (700) being arranged on the frame (100); And one end of the first elastic piece (800) is connected with the first lower die (300), and the other end of the first elastic piece is connected with the second lower die (400) and is used for providing a force for changing the first lower die (300) and the second lower die (400) into a split-die state when being far away from each other.
  4. 4. The cold header for bolt making according to claim 1, wherein the upper die (200) has an upper limit surface (230), the first lower die (300) and the second lower die (400) each have a lower limit surface (320), the upper limit surface (230) and the lower limit surface (320) are used for limiting a position of the upper die (200) to move downward, and the upper die (200), the first lower die (300) and the second lower die (400) are in a clamped state when the upper limit surface (230) abuts against the lower limit surface (320).
  5. 5. The cold header for bolt making according to claim 1, wherein said intermediate clamp group (600) comprises: a moving plate (610), wherein the moving plate (610) is horizontally arranged on the frame (100) in a moving direction perpendicular to the moving directions of the first lower die (300) and the second lower die (400); A first clamping plate (620) and a second clamping plate (630), wherein the first clamping plate (620) and the second clamping plate (630) are movably arranged on the moving plate (610), and the moving direction is parallel to the moving direction of the first lower die (300) and the second lower die (400) and is used for clamping materials so as to drive the materials to move along with the moving plate (610); Wherein, movable plate (610) has and presss from both sides material level and loose material level, go up mould (200) first lower mould (300) with when second lower mould (400) remove for the compound die state, middle clamp group (600) are located loose material level, first splint (620) with second splint (630) loosen the material, go up mould (200) first lower mould (300) with second lower mould (400) remove for the branch mould state, middle clamp group (600) are located and press from both sides the material level, first splint (620) with second splint (630) clamp the material.
  6. 6. The cold header for bolt preparation according to claim 5, wherein the upper die (200) further has a third pushing inclined surface (240), the moving plate (610) has a third pushed inclined surface (611), and the third pushing inclined surface (240) and the third pushed inclined surface (611) abut against each other for realizing transition of the moving plate (610) between a clamping position and a loosening position.
  7. 7. The cold header for bolt making of claim 6, further comprising: -a second elastic member (900), said second elastic member (900) acting on said moving plate (610) providing a force with which said moving plate (610) is kept at a loose level.
  8. 8. The cold header for bolt making of claim 5, further comprising: A second linear drive (1000) and a third linear drive (1100), the second linear drive (1000) and the third linear drive (1100) being arranged on the moving plate (610) for driving the first clamping plate (620) and the second clamping plate (630) to clamp and unclamp material.
  9. 9. The cold header for bolt making according to claim 5, wherein a plurality of clamping positions are formed between the first clamping plate (620) and the second clamping plate (630) for clamping a plurality of material movements.
  10. 10. The cold header for bolt making according to claim 5, wherein an accommodating space (1200) is further provided between the upper die (200), the first lower die (300), and the second lower die (400), the accommodating space (1200) is located around the die cavity (500), and the moving plate (610), the first clamping plate (620), and the second clamping plate (630) are located in the accommodating space (1200).

Description

Cold header for bolt preparation Technical Field The invention belongs to the technical field of cold heading equipment, and particularly relates to a cold heading machine for preparing bolts. Background In the bolt manufacturing industry, the cold heading process is a mainstream method for producing bolts by virtue of the characteristics of high efficiency and high quality. For the preparation of complex bolts, a plurality of stations and a plurality of cold heading steps are often needed to finish the preparation. For example, common procedures include blanking end chamfer, stem pre-reduction, head pre-upset stem region forming, head finish upset stem secondary reduction, final form trimming end face marking, and the like. However, existing cold heading machines typically rely on mechanical clamping jaw operation when transferring a workpiece between different processing steps. The mechanical clamping jaw is required to pull out the workpiece from the cold heading die, and the process not only requires accurate control force, but also increases the complexity of operation. Then, the workpiece is translated, transversely translated, and finally inserted into and translated to a cold heading die of the next station. The whole process has large movement amount and complicated operation, and influences the processing efficiency. The transfer of the work piece makes the number of bolts that can be produced per unit time limited. In addition, the complex operation links also increase the error probability, and once the mechanical clamping jaw has positioning deviation or improper force control in a certain link, the workpiece is possibly damaged or the processing precision is reduced, so that the defective rate is increased, and the production cost is increased. Therefore, development of a novel cold header for bolt preparation is urgently needed to simplify the transfer process of workpieces among stations, reduce the movement amount and improve the processing efficiency and the product quality. Disclosure of Invention The invention aims to provide a cold header for bolt preparation, which solves the technical problem that the workpiece transfer amount greatly influences the processing efficiency when the cold header performs a plurality of cold header steps in the related art. At least one embodiment of the present invention provides a cold header for bolt production, including: A frame; the upper die is arranged on the frame in a lifting manner; The first lower die and the second lower die are horizontally and relatively arranged on the frame in a moving way and are positioned below the upper die, the first lower die and the second lower die are moved to have a die clamping state and a die separating state, a plurality of die cavities which are sequentially arranged are formed between the upper die and the second lower die and are used for sequentially upsetting and forming a workpiece, and the first lower die and the second lower die can be mutually close to each other and kept in the die clamping state or are mutually close to each other and kept in the die separating state after being moved; The middle clamp group is arranged below the upper die and above the first lower die and the second lower die and used for clamping a workpiece to move horizontally and in a straight line direction among a plurality of die cavities. For example, at least one embodiment of the present disclosure provides a cold header for bolt manufacturing, The upper die is provided with a first pushing inclined plane and a second pushing inclined plane, the first pushing inclined plane and the second pushing inclined plane are oppositely arranged, the first lower die is provided with a first pushed inclined plane, the second lower die is provided with a second pushed inclined plane, and the first pushed inclined plane and the second pushed inclined plane are oppositely arranged; the first pushing inclined surface is in movable abutting joint with the first pushed inclined surface, the second pushing inclined surface is in movable abutting joint with the second pushed inclined surface, and the upper die moves downwards to push the first lower die and the second lower die to be close to each other for die assembly. For example, a cold header for bolt preparation that at least one embodiment of the present disclosure provides, still includes: the first linear driving member is arranged to be coupled to the first linear driving member, the first linear driving piece is arranged on the rack; And one end of the first elastic piece is connected with the first lower die, and the other end of the first elastic piece is connected with the second lower die and is used for providing force for changing the first lower die and the second lower die into the split-die state when being mutually far away. For example, at least one embodiment of the present disclosure provides a cold header for bolt manufacturing, the upper die has an upper limiting su