Improved integral forming device for producing stainless steel profiles

Abstract

The utility model discloses an improved integral forming device for producing stainless steel profiles, which relates to the technical field of profile industrial processing equipment, and adopts the technical scheme that the improved integral forming device comprises a die front seat, an external profile die is mounted in the die front seat, and a die support is arranged on the right side of the external profile die; a die middle base is arranged on the right side of the die front base, a die tail base is arranged on the right side of the die middle base, an extrusion cylinder is installed on the left side of the die front base, the structural shape of the side, making contact with the die front base, of the extrusion cylinder is matched with that of the side, making contact with the die front base, of the extrusion cylinder, a cylindrical blank is arranged in the extrusion cylinder, and a dowel bar is arranged on the left side of the extrusion cylinder. In the prior art, a die front seat is of an integral structure, the contact part of the die seat and an extrusion cylinder is often collided, extruded and impacted and is easy to damage, the whole die seat needs to be replaced once the damage is caused, and the tool cost is higher. The die front seat is of a combined structure and comprises the outer ring and the inner ring, so that only a new inner ring needs to be replaced after the inner ring is damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial processing equipment for profiles, in particular to an improved integral forming device for producing stainless steel profiles. Background Art

[0002] There are many types of stainless steel profiles, including H-steel, I-beam, angle steel, channel steel, rail steel and other shapes. They have reasonable cross-sectional distribution and optimized strength-to-weight ratio. They have the characteristics of high structural strength, light weight and cost savings. They have been widely used as structural parts in many fields.

[0003] Steel sections are generally formed by hot rolling, welding and hot extrusion. The hot rolling process is suitable for mass production of carbon steel sections. For small batches of stainless steel orders, the hot rolling process requires large molds and is costly. At the same time, stainless steel has high resistance to deformation, a narrow hot working temperature range, low dimensional accuracy of hot rolled products, and poor surface quality. When steel sections are produced using the welding process, welds exist, the overall performance is inconsistent, and the corrosion resistance is poor. The extrusion process has the characteristics of three-way compressive stress, which greatly exerts the metal's plastic deformation ability, makes the material structure denser, has high dimensional accuracy, and has flexible production organization. It is very suitable for the production of small batches of high-end products such as stainless steel.

[0004] The existing hot extrusion process mold installation method is an internal method, that is, the extrusion mold is installed on the die base from the side of the billet metal extrusion. For round tubes with simple shapes, demolding after extrusion is relatively smooth. For steel sections with complex shapes, the steel sections are easily stuck in the extrusion die after extrusion and are not easy to demold, which wastes a lot of time and seriously restricts the production rhythm. At the same time, the contact part between the die base and the extrusion barrel is often bumped and extruded, and is easily damaged. Once damaged, the entire die base needs to be replaced, and the tooling cost is high. In view of the above problems, it is urgently necessary to carry out innovative design based on the original profile production equipment structure. Utility Model Content

[0005] The utility model aims to provide an improved integral forming device for producing stainless steel profiles, which solves the problem that the existing hot extrusion process mold installation method in the prior art is a built-in method, that is, the extrusion mold is installed on the die base from the side of the billet metal extrusion. For round tubes with simple shapes, demoulding after extrusion is relatively smooth. For steel sections with complex shapes, the steel sections are easily stuck in the extrusion die after extrusion and are not easy to demould, which wastes a lot of time and seriously restricts the production rhythm. At the same time, the contact part between the die base and the extrusion barrel is often bumped and extruded, and is easily damaged. Once damaged, the entire die base needs to be replaced, and the tooling cost is high.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an improved integral forming device for producing stainless steel profiles, comprising a die front seat, an external profile mold is installed inside the die front seat, a mold support is arranged on the right side of the external profile mold, a die middle seat is arranged on the right side of the die front seat, a die tail seat is arranged on the right side of the die middle seat, an extrusion cylinder is installed on the left side of the die front seat, the structural shapes of the side where the extrusion cylinder contacts the die front seat are matched with each other, a cylindrical blank is arranged inside the extrusion cylinder, a force transmission rod is arranged on the left side of the extrusion cylinder, the force transmission rod is powered by a hydraulic device and can be extended into the extrusion cylinder and move left and right, a movable force transmission pad is arranged between the force transmission rod and the blank, a glass pad is installed on the left side of the external profile mold, a profile body is arranged inside the die tail seat, the die front seat comprises an outer ring and an inner ring, an inner ring is installed inside the outer ring, and the sizes of the inner ring and the outer ring are matched with each other.

[0007] Preferably, the angle α between the mold front seat and the contact portion of the extrusion cylinder is 59.5° to 60.5°, and the angle δ between the external profile mold and the outer ring is 102° to 104°.

[0008] Preferably, the external profile mold includes a profile mold cavity, which is opened inside the external profile mold. The shape of the external profile mold is consistent with the contour at the entrance of the mold front seat. The axial length of the external profile mold is 30mm to 40mm, the radial thickness of the external profile mold is 20mm to 70mm, and the shape and size of the profile mold cavity are determined by the production profile body.

[0009] Preferably, the mold support cavity size is 12mm to 16mm larger than the external profile mold cavity size, the mold center seat cavity size is 16mm to 25mm larger than the mold support cavity size, and the mold tail seat cavity size is 25mm to 30mm larger than the mold center seat cavity size. The cavity shapes of the mold support, front mold seat, middle mold seat and tail mold seat are consistent with the profile to be produced.

[0010] Preferably, the extrusion cylinder comprises an outer shell layer, an intermediate layer and an inner lining layer, the intermediate layer is installed inside the outer shell layer, the inner lining layer is installed inside the intermediate layer, the length of the extrusion cylinder is 1500mm to 1550mm, and the extrusion cylinder has a taper of 0.6mm to 1.5mm in the inner circle length direction.

[0011] Preferably, the force transfer pad is a solid cylinder with a length of 201mm to 210mm, the gap between the outer ring and the inner hole of the extrusion cylinder is 1.5mm to 3.0mm, the gap between the force transfer rod and the inner lining is 3mm to 6mm, and the force transfer rod applies extrusion force to the high-temperature billet through the force transfer pad.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. In the prior art, the die front seat is an integral structure, and the part where the die seat contacts the extrusion barrel is often bumped, squeezed and impacted, and is easily damaged. Once damaged, the entire die seat needs to be replaced, and the tooling cost is high. The die front seat of the utility model is a combined structure, including an outer ring and an inner ring, so that when the inner ring is damaged, only a new inner ring needs to be replaced.

[0014] 2. In the prior art, the extrusion die is installed in an internal manner. The extrusion die is installed on the die seat from the side where the blank metal is extruded. After the steel section is extruded, it is easy to get stuck in the extrusion die and is not easy to demold, which seriously restricts the production rhythm. The die front seat installation die of the utility model adopts an external manner. The extrusion die can be installed inside the die front seat from the side where the blank metal is extruded. After the profile body is extruded, the extrusion die is left on the remaining side, which is convenient for separation from the profile body after hot sawing, solving the problem of difficult demolding after extrusion.

[0015] 3. The new model has a simple structure, convenient mold change, and flexible operation. It solves the problem of mold sticking and difficult demoulding after extrusion, greatly improves production efficiency, reduces energy consumption, and is suitable for the production of stainless steel profiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the integral forming device for producing stainless steel profiles according to the utility model;

[0017] Figure 2 It is a structural schematic diagram of the mold front seat in the prior art;

[0018] Figure 3 This is a schematic diagram of the structure of the front seat of the mold in the utility model technology;

[0019] Figure 4 It is an axonometric view of the front seat of the utility model;

[0020] Figure 5 This is a schematic diagram of the outer ring structure of the front seat of the utility model;

[0021] Figure 6 This is the outer ring axial view of the front seat of the utility model;

[0022] Figure 7 This is a schematic diagram of the inner ring structure of the front seat of the utility model;

[0023] Figure 8 This is the inner ring axial view of the front seat of the utility model;

[0024] Fig. 9 It is a structural schematic diagram of the mold base assembly of the utility model;

[0025] Fig.10 It is an axonometric view of the mold base assembly of the utility model;

[0026] Fig.11 This is a structural schematic diagram of the external profile mold of the utility model;

[0027] Fig.12 It is a structural schematic diagram of the external profile mold and mold support combination of the utility model;

[0028] Fig.13 This is a schematic diagram of the structure of the extrusion cylinder of the utility model;

[0029] Fig.14 It is an axonometric view of the extrusion cylinder of the utility model;

[0030] In the figure: 1. force transfer rod; 2. force transfer pad; 3. blank; 4. extrusion cylinder; 41. outer shell layer; 42. middle layer; 43. inner lining layer; 5. external profile mold; 51. profile mold cavity; 6. mold support; 7. mold front seat; 71. outer ring; 72. inner ring; 8. mold center seat; 9. mold tail seat; 10. glass pad; 11. profile body. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Example 1

[0033] like Figure 1-Figure 14 As shown in the figure, an improved integral forming device for producing stainless steel profiles includes a die front seat 7, an external profile mold 5 is installed inside the die front seat 7, a die support 6 is arranged on the right side of the external profile mold 5, a die middle seat 8 is arranged on the right side of the die front seat 7, a die tail seat 9 is arranged on the right side of the die middle seat 8, an extrusion cylinder 4 is installed on the left side of the die front seat 7, and the structural shapes of the side where the extrusion cylinder 4 contacts the die front seat 7 are consistent with each other, a cylindrical blank 3 is arranged inside the extrusion cylinder 4, a force transmission rod 1 is arranged on the left side of the extrusion cylinder 4, the force transmission rod 1 is powered by a hydraulic device, and can be extended into the extrusion cylinder 4 and move left and right, a movable force transmission pad 2 is arranged between the force transmission rod 1 and the blank 3, a glass pad 10 is installed on the left side of the external profile mold 5, a profile body 11 is arranged inside the die tail seat 9, and the die support 6, the die middle seat 8 and the die tail seat 9 jointly support the external profile mold 5.

[0034] The mold front seat 7 includes an outer ring 71 and an inner ring 72. The inner ring 72 is installed inside the outer ring 71. The sizes of the inner ring 72 and the outer ring 71 are consistent with each other. The outer end surface of the inner ring 72 is easily damaged by collision during operation. The mold front seat 7 is made into a combined structure for easy processing and assembly. When the inner ring 72 is damaged, it only needs to be replaced with a new inner ring 72. Compared with the mold front seat 7 with an integral structure, the cost is reduced.

[0035] The angle α between the die front seat 7 and the extrusion cylinder 4 is 59.5°~60.5°, and the angle δ between the external profile mold 5 and the outer ring 71 is 102°~104°. The external profile mold 5 can be installed inside the die front seat 7 from the metal extrusion side of the blank 3. After the profile body 11 is extruded, the mold is left on the residual side to facilitate separation from the profile body 11 after hot sawing, thereby solving the problem of long demoulding time of the profile body 11 and seriously affecting production efficiency.

[0036] The external profile mold 5 includes a profile mold cavity 51, which is opened inside the external profile mold 5. The shape of the external profile mold 5 is consistent with the contour of the entrance of the mold front seat 7. The axial length of the external profile mold 5 is 30mm~40mm, and the radial thickness of the external profile mold 5 is 20mm~70mm. The shape and size of the profile mold cavity 51 are determined by the production profile body 11. The profile mold cavity 51 is axially composed of an inlet transition zone, an intermediate sizing zone and an outlet anti-cone zone. The arc radius of the inlet transition zone is 10mm~25mm, and the length of the intermediate sizing zone is 6mm~10mm. The material of the external profile mold 5 is H13, and the surface roughness is not more than 0.8μm.

[0037] The cavity size of the mold support 6 is 12mm to 16mm larger than the cavity size of the external profile mold 5, the cavity size of the mold center seat 8 is 16mm to 25mm larger than the cavity size of the mold support 6, and the cavity size of the mold tail seat 9 is 25mm to 30mm larger than the cavity size of the mold center seat 8. The cavity shapes of the mold support 6, the mold front seat 7, the mold center seat 8 and the mold tail seat 9 are consistent with the profile body 11 to be produced, and are fixed by locating pins during installation.

[0038] The extrusion cylinder 4 includes an outer shell layer 41, an intermediate layer 42 and an inner lining layer 43. The intermediate layer 42 is installed inside the outer shell layer 41, and the inner lining layer 43 is installed inside the intermediate layer 42. The length of the extrusion cylinder 4 is 1500mm~1550mm. The extrusion cylinder 4 has a taper of 0.6mm~1.5mm in the inner circle length direction. The various layers of bushings are assembled with each other in an interference fit manner. The front end structural shape of the extrusion cylinder 4 is designed to correspond to the structural shape of the mold front seat 7.

[0039] The force transfer pad 2 is a solid cylinder with a length of 201mm to 210mm. The gap between the outer ring 71 and the inner hole of the extrusion cylinder 4 is 1.5mm to 3.0mm. The gap between the force transfer rod 1 and the inner lining 43 is 3mm to 6mm. The force transfer rod 1 applies extrusion force to the high-temperature billet 3 through the force transfer pad 2. The metal of the high-temperature billet 3 enters the profile mold cavity 51 under the action of three-way compressive stress to produce the required profile body 11.

[0040] Working principle: When using the integral forming device of the profile body 11, combined with Figure 1 , Figure 3 to Figure 12 As shown, according to the shape and size of the profile body 11 to be produced, the corresponding cylindrical blank 3 and the forming mold are processed, and firstly, the force transmission rod 1, the force transmission pad 2, the extrusion cylinder 4, the external profile mold 5, the mold support 6, the mold front seat 7, the mold middle seat 8 and the mold tail seat 9 of the corresponding size are installed; the cylindrical blank 3 is evenly heated to a high temperature state, and then coated with glass powder lubricant and loaded into the extrusion cylinder 4, and the force transmission rod 1 is used to push the force transmission pad 2 and the blank 3 to move to the front end of the external profile mold 5 in the extrusion direction. After the front end of the blank 3 contacts the glass pad 10 close to the front end of the external profile mold 5, the force transmission rod 1 continues to push in the extrusion direction, and the force transmission pad 2 is used to apply force to the blank 3 Add extrusion pressure to first cause the blank 3 to be upset and deformed, eliminating the gap between the outer circle of the blank 3 and the inner wall of the extrusion cylinder 4, and then the blank 3 is extruded into the cavity of the external profile mold 5 to become the profile body 11 to be produced. When the force transmission rod 1 advances to the limit stop, 40mm of unextruded blank 3 is left in the extrusion cylinder 4, and then the switch of the locking extrusion cylinder 4 is turned on, the extrusion cylinder 4 is withdrawn, and at the same time, the blank 3 pressure residue, the external profile mold 5, the force transmission pad 2 and the force transmission rod 1 are withdrawn together, and the blank 3 pressure residue and the external profile mold 5 are cut off from the profile body 11 with heat, and the profile body 11 is transported to the cooling bed from the outlet direction of the extruder, and this extrusion process is completed.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An improved integral forming device for producing stainless steel profiles, comprising a die front seat (7), characterized in that: An external profile mold (5) is installed inside the mold front seat (7), a mold support (6) is arranged on the right side of the external profile mold (5), a mold center seat (8) is arranged on the right side of the mold front seat (7), a mold tail seat (9) is arranged on the right side of the mold center seat (8), an extrusion cylinder (4) is installed on the left side of the mold front seat (7), the structural shapes of the side of the extrusion cylinder (4) in contact with the mold front seat (7) are consistent with each other, a cylindrical blank (3) is arranged inside the extrusion cylinder (4), and a force transmission rod (1) is arranged on the left side of the extrusion cylinder (4) The force transmission rod (1) is powered by a hydraulic device and can be extended into the extrusion cylinder (4) to move left and right. A movable force transmission pad (2) is arranged between the force transmission rod (1) and the blank (3). A glass pad (10) is installed on the left side of the external profile mold (5). A profile body (11) is arranged inside the tail seat (9). The front seat (7) includes an outer ring (71) and an inner ring (72). The inner ring (72) is installed inside the outer ring (71). The sizes of the inner ring (72) and the outer ring (71) are consistent with each other.

2. An improved integral forming device for producing stainless steel profiles according to claim 1, characterized in that: The included angle α between the die front seat (7) and the extrusion cylinder (4) at the fitting position is 59.5° to 60.5°, and the included angle δ between the external profile die (5) and the outer ring (71) is 102° to 104°.

3. An improved integral forming device for producing stainless steel profiles according to claim 1, characterized in that: The external profile mold (5) comprises a profile mold cavity (51), the profile mold cavity (51) is opened inside the external profile mold (5), the outer shape of the external profile mold (5) is consistent with the contour of the entrance of the mold front seat (7), the axial length of the external profile mold (5) is 30mm to 40mm, the radial thickness of the external profile mold (5) is 20mm to 70mm, and the shape and size of the profile mold cavity (51) are determined by the production profile body (11).

4. An improved integral forming device for producing stainless steel profiles according to claim 1, characterized in that: The cavity size of the mold support (6) is 12 mm to 16 mm larger than the cavity size of the external profile mold (5); the cavity size of the mold center seat (8) is 16 mm to 25 mm larger than the cavity size of the mold support (6); the cavity size of the mold tail seat (9) is 25 mm to 30 mm larger than the cavity size of the mold center seat (8); and the cavity shapes of the mold support (6), the mold front seat (7), the mold center seat (8) and the mold tail seat (9) are all consistent with the profile body (11) to be produced.

5. An improved integral forming device for producing stainless steel profiles according to claim 1, characterized in that: The extrusion cylinder (4) comprises an outer shell layer (41), an intermediate layer (42) and an inner lining layer (43); the intermediate layer (42) is installed inside the outer shell layer (41), and the inner lining layer (43) is installed inside the intermediate layer (42); the length of the extrusion cylinder (4) is 1500 mm to 1550 mm, and the extrusion cylinder (4) has a taper of 0.6 mm to 1.5 mm in the inner circle length direction.

6. An improved integral forming device for producing stainless steel profiles according to claim 5, characterized in that: The force transmission pad (2) is a solid cylinder with a length of 201 mm to 210 mm. The gap between the outer ring (71) and the inner hole of the extrusion cylinder (4) is 1.5 mm to 3.0 mm. The gap between the force transmission rod (1) and the inner lining layer (43) is 3 mm to 6 mm. The force transmission rod (1) applies extrusion force to the high-temperature billet (3) through the force transmission pad (2).

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