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CN-224208817-U - Forming device for difficult-to-deform alloy section bar

CN224208817UCN 224208817 UCN224208817 UCN 224208817UCN-224208817-U

Abstract

The utility model belongs to the technical field of profile industrial processing equipment, and discloses a forming device of a difficult-to-deform alloy profile, which comprises a dowel bar, an extrusion barrel, an external profile die, a die support, a die front seat, a die middle seat and a die tail seat, wherein a cylindrical cavity for placing a cylindrical blank is formed in the extrusion barrel, one end of the dowel bar extends into the cylindrical cavity of the extrusion barrel and slides in the cylindrical cavity, the dowel bar is provided with the dowel bar at one end extending into the extrusion barrel, and the dowel bar applies extrusion force to the cylindrical blank in the cylindrical cavity through the dowel bar. The utility model is suitable for the forming production of the alloy section bar difficult to deform, has simple structure and flexible operation, solves the problems of die clamping and difficult demoulding after extrusion is finished, greatly improves the production efficiency and reduces the energy consumption.

Inventors

  • WANG JINYONG

Assignees

  • 邯郸新兴特种管材有限公司

Dates

Publication Date
20260508
Application Date
20241223

Claims (5)

  1. 1. The forming device of the difficult-to-deform alloy section bar is characterized by comprising a dowel bar (1), a dowel pad (2), an extrusion cylinder (4), an external section bar die (5), a die support (6), a die front seat (7), a die middle seat (8) and a die tail seat (9); A cylindrical cavity for placing the cylindrical blank (3) is formed in the extrusion barrel (4), one end of the dowel bar (1) stretches into the cylindrical cavity of the extrusion barrel (4) and slides in the cylindrical cavity, a dowel pad (2) is arranged at one end of the dowel bar (1) stretching into the extrusion barrel (4), and the dowel bar (1) applies extrusion force to the cylindrical blank (3) in the cylindrical cavity through the dowel pad (2); The force transmission pad (2) is solid or hollow cylindrical, the length of the force transmission pad (2) along the axial direction is 100 mm-230 mm, and the outer diameter of the force transmission pad (2) is 1.0 mm-3.0 mm smaller than the inner diameter of the cylindrical cavity of the extrusion barrel (4), and the outer diameter of the force transmission rod (1) is 3 mm-10 mm smaller than the inner diameter of the cylindrical cavity of the extrusion barrel (4); A die front seat (7) is arranged at one end of the extrusion cylinder (4) far away from the dowel bar (1), a die middle seat (8) and a die tail seat (9) are sequentially arranged at one end of the die front seat (7) far away from the extrusion cylinder (4), an external profile die (5) is arranged in the die front seat (7), a die support (6) is arranged at one end of the external profile die (5) far away from the extrusion cylinder (4), and the die support (6), the die middle seat (8) and the die tail seat (9) are used for jointly supporting the external profile die (5); The structure shape of one end of the extrusion cylinder (4) contacted with the die front seat (7) is correspondingly provided, one surface of the extrusion cylinder (4) contacted with the die front seat (7) is provided with positioning holes, the inside of each positioning hole is fixed by a positioning pin, the included angle alpha of the joint part of the die front seat (7) and the extrusion cylinder (4) is 59.5-60.5 degrees, and the included angle delta of the position of the die (5) for installing the external profile is 102-104 degrees; The middle part of the die middle seat (8) is provided with a first cavity, the middle part of the die tail seat (9) is provided with a second cavity, the size of the first cavity of the die middle seat (8) is 6 mm-25 mm larger than that of the die cavity of the die support (6), and the size of the second cavity of the die tail seat (9) is 6 mm-30 mm larger than that of the first cavity of the die middle seat (8); The shape of the mould cavity of the mould support (6), the first cavity of the mould middle seat (8) and the second cavity of the mould tail seat (9) are consistent with the shape of the section bar (11) to be produced.
  2. 2. The forming device of the difficult-to-deform alloy profile according to claim 1, wherein the die front seat (7) adopts a split structure and comprises an outer ring (71) and an inner ring (72), and the outer ring (71) is arranged on the outer surface of the inner ring (72).
  3. 3. The forming device of the difficult-to-deform alloy section bar according to claim 2, wherein the external profile of the external profile die (5) is consistent with the profile of the inlet of the die front seat (7), the axial length of the external profile die (5) is 30-40 mm, the radial thickness is 20-70 mm, the surface roughness is not more than 0.8 μm, and the external profile die (5) is made of H13 die steel; The middle part of the external section bar die (5) is provided with a section bar die cavity (51), the shape and the size of the section bar die cavity (51) are consistent with those of a section bar (11) to be produced, the section bar die cavity (51) consists of an inlet transition area, a middle sizing area and an outlet reverse taper area, the arc radius of the inlet transition area is 10 mm-25 mm, and the length of the middle sizing area is 6 mm-10 mm.
  4. 4. The forming device of the difficult-to-deform alloy profile according to claim 3, wherein a die cavity is arranged in the middle of the die support (6), and the size of the die cavity of the die support (6) is 6 mm-16 mm larger than that of the profile cavity (51) of the external profile die (5).
  5. 5. The forming device of the difficult-to-deform alloy profile according to claim 1, wherein the extrusion cylinder (4) comprises an inner liner layer (43), an intermediate layer (42) and an outer shell layer (41), the extrusion cylinder (4) has a length of 1500 mm-1550 mm, and a taper of 0.6 mm-1.5 mm is formed in the length direction of an inner circle.

Description

Forming device for difficult-to-deform alloy section bar Technical Field The utility model belongs to the technical field of industrial processing equipment of profiles and relates to a forming device of a difficult-to-deform alloy profile. Background The difficult-to-deform alloy section has more types, relates to the shapes of round pipes, stepped shaft parts, H steel, I steel, angle steel, channel steel, track steel and the like, has reasonable section distribution and relatively optimized strength-to-weight ratio, has the characteristics of high structural strength, light weight and cost saving, and is widely used in a plurality of fields as a structural part. Conventional profiles are generally formed by hot rolling, welding and hot extrusion processes. The hot rolling process is suitable for mass production of profiles made of carbon steel, and for small batches of difficult-to-deform alloy profiles such as stainless steel, the hot rolling process has the advantages of large production investment mould, high cost, large deformation resistance of the difficult-to-deform alloy such as stainless steel, narrow hot working temperature range, low dimensional precision of hot rolled products and poor surface quality. The section produced by the welding process has the defects of welding lines, non-uniformity of overall performance and poor corrosion resistance. The extrusion process has the characteristic of three-dimensional compression stress, greatly exerts the plastic deformation capability of metal, has more compact structure, high dimensional accuracy and flexible production structure, and is very suitable for the production of small-batch stainless steel and other difficult-to-deform alloy variant products. In the existing hot extrusion process, the mode of installing the profile die is a built-in mode, as shown in fig. 1, the included angle alpha 'of the joint part of the die front seat and the extrusion cylinder is 59.5-60.5 degrees, the included angle delta' of the position of the profile die is 78-78.5 degrees, and as the mode of installing the profile die is a built-in mode, the die stripping after extrusion is smooth for a circular profile with a simple shape, and the die stripping after extrusion is easy to clamp in the built-in profile die for a profile with a complex shape, so that the die stripping is difficult, a large amount of time is wasted, and the production rhythm is severely restricted. Meanwhile, the contact part of the die front seat and the extrusion cylinder is frequently knocked and extruded, so that the die front seat is easy to damage, and the whole die front seat needs to be replaced once damaged, so that the tooling cost is high. Aiming at the problems, innovative design is urgently needed on the basis of the structure of the original profile production equipment so as to facilitate the production of the profile difficult to deform. Disclosure of utility model The utility model aims to provide a forming device for a difficult-to-deform alloy section, which solves the problems that the extruded section is easy to clamp in the section die and difficult to demould by externally installing an external section die in a die front seat. The technical scheme adopted by the utility model for realizing the purposes is as follows: A forming device of a difficult-to-deform alloy section bar comprises a dowel bar, an extrusion cylinder, an external section bar die, a die support, a die front seat, a die middle seat and a die tail seat; The inside of the extrusion cylinder is provided with a cylindrical cavity for placing a cylindrical blank, one end of a dowel bar stretches into the cylindrical cavity of the extrusion cylinder and slides in the cylindrical cavity, one end of the dowel bar stretching into the extrusion cylinder is provided with a dowel pad, and the dowel bar applies extrusion force to the cylindrical blank in the cylindrical cavity through the dowel pad; The die comprises a dowel bar, a die front seat, a die middle seat, a die tail seat, an external section bar die, a die support, a die middle seat and a die tail seat, wherein the die front seat is arranged at one end of the extrusion cylinder, which is far away from the dowel bar, and the die middle seat and the die tail seat are sequentially arranged at one end of the die front seat, which is far away from the extrusion cylinder; The structure shape of one end of the extrusion cylinder, which is contacted with the die front seat, is correspondingly arranged, the included angle alpha of the joint part of the die front seat and the extrusion cylinder is 59.5-60.5 degrees, and the included angle delta of the position where the external profile die is arranged is 102-104 degrees. As a limitation, the die front seat adopts a split structure and comprises an outer ring and an inner ring, and the outer ring is arranged on the outer surface of the inner ring. As further limitation, the external profile die has the shape consist