Hot extrusion mechanism for nickel alloy composite pipe

Abstract

The invention relates to a nickel alloy composite pipe hot extrusion mechanism which comprises an adjusting frame, two first round holes are formed in the adjusting frame, a first supporting ring is fixedly arranged in one first round hole, and a second supporting ring is fixedly arranged in the other first round hole; four gear supporting plates are arranged on the outer wall of the first supporting ring, rotating shafts are rotationally arranged on the gear supporting plates, one ends of the rotating shafts are fixedly sleeved with small gears, and the other ends of the rotating shafts are rotationally installed on the inner wall of the adjusting frame; through the meshing effect of the large gear, the other three small gears also rotate synchronously, so that consistent movement of the four straightening wheels is realized, and effective straightening and surface treatment are carried out on a blank; oxide skin and surface cracks can be removed, and the situation that the oxide skin is pressed into a material during extrusion, and consequently inclusion, peeling or rough surface of a finished product is caused is avoided; slight bending or local protrusions of the heated blank can be eliminated through correction, it is guaranteed that the blank makes contact with the die evenly, and stress concentration in the extrusion process is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of alloy composite pipes and relates to a nickel alloy composite pipe hot extrusion mechanism. BACKGROUND

[0002] In the hot extrusion process of metal materials, the blank usually needs to be heated to a high temperature to achieve good plastic deformation capacity, however, the surface of the heated blank often has defects such as oxide scale, impurities or local unevenness, and these surface problems will directly affect the quality of the subsequent extrusion process and the service life of the die;

[0003] Under a high temperature environment, the surface of the metal blank is prone to react with oxygen in the air to form an oxide layer, and the oxide scale not only reduces the surface quality of the extruded part, but also can be pressed into the material inside, resulting in defects such as inclusions and cracks in the product; the blank may be slightly bent or uneven due to uneven heating or gravity during the heating process; if direct extrusion is performed, the unevenness may cause uneven extrusion force distribution and aggravate die wear. SUMMARY

[0004] The purpose of the present application is to provide a nickel alloy composite pipe hot extrusion mechanism that can solve the problems raised in the background art.

[0005] According to the technical scheme provided by the present application: a nickel alloy composite pipe hot extrusion mechanism, comprising an adjusting frame, two first circular holes are formed in the adjusting frame, one of the first circular holes is fixedly provided with a first support ring, and the other first circular hole is fixedly provided with a second support ring; the outer wall of the first support ring is provided with four gear support plates, a rotating shaft is rotatably arranged on the gear support plates, a small gear is fixedly sleeved on one end of the rotating shaft, the other end of the rotating shaft is rotatably installed on the inner wall of the adjusting frame, and a correcting wheel is fixedly sleeved on the rotating shaft;

[0006] A large gear is fixedly sleeved on the outer wall of the first support ring, and the large gear is in meshing relationship with the four small gears; the other end of one of the rotating shafts extends out of the adjusting frame, is connected with a driving motor, and is driven to rotate by the driving motor, and cooperates with the large gear to make the four small gears rotate synchronously to drive the correcting wheel to rotate synchronously, so as to correct and surface treat the blank.

[0007] Preferably, the outer wall of the second support ring is provided with four connecting rods, and a circular ring is arranged on each connecting rod, the circular ring is rotatably sleeved on the rotating shaft to form support for the rotating shaft, so that the correcting wheel is more stable during operation.

[0008] Preferably, a base is arranged below the adjusting frame, the base is provided with a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are fixedly connected with the adjusting frame respectively to form a suspended state of the bottom of the adjusting frame, the first fixing plate and the second fixing plate are both provided with a second circular hole, the second circular hole has the same diameter as the first circular hole and is communicated with the first circular hole.

[0009] Preferably, the base is provided with a second supporting plate, the second supporting plate is provided with a die, one end of the die is arranged on the second fixing plate, and the die is communicated with the second circular hole.

[0010] Preferably, the base is provided with a first supporting plate, the first supporting plate is provided with a pushing assembly, the pushing assembly heats the blank and pushes the blank into the die to form hot extrusion on the blank.

[0011] Preferably, the pushing assembly comprises a heating ring, a placing ring, a pushing ring, an oil cylinder and a push plate, the first supporting plate is provided with the pushing ring, the pushing ring is provided with the placing ring, and the placing ring is provided with the heating ring, the oil cylinder is arranged in the pushing ring, and the output end of the oil cylinder is provided with the push plate.

[0012] Preferably, the placing ring is arranged in a semicircle, the placing ring is used for placing the blank, and under the pushing of the oil cylinder, the push plate pushes the blank into the heating ring to form heating on the blank.

[0013] Preferably, the inner diameters of the heating ring, the placing ring, the first supporting ring and the second supporting ring are the same and are communicated, and the median lines are the same.

[0014] The nickel alloy composite pipe hot extrusion mechanism has the following advantages:

[0015] 1. One of the shafts is driven by a driving motor, the shaft drives the corresponding pinion to rotate, and then the big gear is engaged to make the other three pinions rotate synchronously, so that the four correction wheels move uniformly to effectively correct and surface treat the blank;

[0016] The oxide skin and surface cracks can be removed, the oxide skin is prevented from being pressed into the material during extrusion, and the finished product is prevented from being mixed, peeled or rough; the correction can eliminate the slight bending or local bulging of the blank after heating, ensure that the blank is uniformly contacted with the die, reduce stress concentration in the extrusion process, make the extrusion force uniformly distributed in the extrusion process, and reduce the service life of the die. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the present application.

[0018] Figure 2is the sectional view of the pushing assembly of the present application.

[0019] Figure 3 is the sectional view of the adjusting frame of the present application.

[0020] Figure 4 is the schematic view of the gear engagement of the present application.

[0021] In the figure: base 1; first support plate 11; pushing assembly 2; heating ring 21; placing ring 22; pushing ring 23; oil cylinder 24; pushing plate 25; first fixed plate 3; second fixed plate 31; adjusting frame 32; through hole 33; connecting rod 5; mold 51; rotating shaft 52; correcting wheel 53; pinion 54; gear support plate 55; first support ring 56; gear wheel 57; second support plate 6; second support ring 7. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0024] As shown in Figures 1-4 The present application is a nickel alloy composite pipe hot extrusion mechanism, which comprises an adjusting frame 32, two first circular holes are formed in the adjusting frame 32, a first support ring 56 is fixedly arranged in one of the first circular holes, and a second support ring 7 is fixedly arranged in the other first circular hole; four gear support plates 55 are arranged on the outer wall of the first support ring 56, a rotating shaft 52 is rotatably arranged on the gear support plates 55, a pinion 54 is fixedly sleeved on one end of the rotating shaft 52, the other end of the rotating shaft 52 is rotatably installed on the inner wall of the adjusting frame 32, and a correcting wheel 53 is fixedly sleeved on the rotating shaft 52;

[0025] The outer wall of the first supporting ring 56 is fixedly sleeved with a head gear wheel 57, and the gear wheel 57 is in meshing with the four pinion gears 54; the other end of one of the rotating shafts 52 extends out of the adjusting frame 32, is connected with a driving motor, and is driven to rotate by the driving motor, and cooperates with the gear wheel 57 to drive the four pinion gears 54 to rotate synchronously, so as to drive the four correcting wheels 53 to rotate synchronously, so as to correct and surface treat the blank;

[0026] One adjusting frame 32 is mainly used for fixing and supporting other components, the first supporting ring 56 and the second supporting ring 7 are used as supporting elements for stabilizing and guiding the blank; the outer wall of the first supporting ring 56 is provided with four gear supporting plates 55, which provide installation positions for the pinion gears 54;

[0027] The pinion gears 54 are connected with the gear supporting plates 55 through the rotating shafts 52, and rotate around the shaft center under the driving of the rotating shafts 52; the correcting wheels 53 are fixedly installed on the rotating shafts 52 and can rotate under the driving of the pinion gears 54, and are used for correcting and surface treating the nickel alloy composite pipe blank;

[0028] The head gear wheel 57 is fixedly sleeved on the outer wall of the first supporting ring 56 and is in meshing with the four pinion gears 54, so as to ensure that they can rotate synchronously;

[0029] One of the rotating shafts 52 is driven by a driving motor, the rotating shaft 52 drives the corresponding pinion gear 54 to rotate, and then the meshing of the gear wheel 57 drives the other three pinion gears 54 to rotate synchronously, so that the four correcting wheels 53 move uniformly, and the blank is effectively corrected and surface treated;

[0030] The oxide skin and surface cracks can be removed, the oxide skin is prevented from being pressed into the material inside during extrusion, and the finished product is prevented from appearing inclusion, peeling or rough surface; the correction can eliminate the slight bending or local bulging of the blank after heating, ensure that the blank is uniformly contacted with the mold, reduce stress concentration in the extrusion process, make the extrusion force uniformly distributed in the extrusion process, and reduce the service life of the mold 51.

[0031] Preferably, the outer wall of the second supporting ring 7 is provided with four connecting rods 5, each of which is provided with a circular ring 51, and the circular ring 51 is rotatably sleeved on the rotating shaft 52 to form support for the rotating shaft 52, so that the correcting wheel 53 is more stable during operation.

[0032] Preferably, the bottom of the adjusting frame 32 is provided with a base 1, the base 1 is provided with a first fixed plate 3 and a second fixed plate 31, the first fixed plate 3 and the second fixed plate 31 are respectively fixedly connected with the adjusting frame 32 to form a suspended state at the bottom of the adjusting frame 32, and the first fixed plate 3 and the second fixed plate 31 are both provided with a second circular hole, the second circular hole has the same diameter as the first circular hole and is in communication with the first circular hole.

[0033] Preferably, the base 1 is provided with a second support plate 6, and a mold 51 is arranged on the second support plate 6, and the other end of the mold 51 is arranged on the second fixed plate 31, and the mold 51 is communicated with the second circular hole.

[0034] Preferably, the base 1 is provided with a first support plate 11, and a pushing assembly 2 is arranged on the first support plate 11, and the pushing assembly 2 heats the blank and pushes it into the mold to form hot extrusion on the blank.

[0035] Preferably, the pushing assembly 2 comprises a heating ring 21, a placing ring 22, a pushing ring 23, an oil cylinder 24 and a push plate 25; the first support plate 11 is provided with the pushing ring 23, the pushing ring 23 is provided with the placing ring 22, and the placing ring 22 is provided with the heating ring 21; the oil cylinder 24 is arranged in the pushing ring 23, and the output end of the oil cylinder 24 is provided with the push plate 25.

[0036] Preferably, the placing ring 22 is in a semicircular row, and the placing ring 22 is used for placing the blank, and under the pushing of the oil cylinder 24, the push plate 25 pushes the blank into the heating ring 21 to form heating on the blank.

[0037] Preferably, the inner diameters of the heating ring 21, the placing ring 22, the first support ring 56 and the second support ring 7 are the same, and are communicated, and the median lines are the same.

[0038] The base 1 serves as a basic support to ensure the stability and reliability of the whole device; the first support plate 11 provides an installation platform to facilitate the installation and stable operation of the pushing assembly 2; the pushing assembly 2 realizes effective heating and accurate pushing on the blank through the cooperative work of the heating ring 21, the placing ring 22, the pushing ring 23, the oil cylinder 24 and the push plate 25; the placing ring 22 is designed in a semicircular shape to place the blank; the heating ring 21 uniformly heats the blank to ensure uniform heating of the material and improve the hot extrusion effect; and the oil cylinder 24 and the push plate 25 realize accurate pushing on the blank to send the heated blank into the mold to complete hot extrusion.

[0039] The overall working principle is as follows: first, the blank is placed in the placing ring 22, and then the blank is uniformly heated by the heating ring 21, and then the oil cylinder 24 drives the push plate 25 to push the heated blank into the pushing ring 23, and further accurately push it into the mold for hot extrusion forming.

[0040] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the present application, and the present application is not limited thereto. Those skilled in the art can make various modifications and improvements without departing from the spirit and essence of the present application, and these modifications and improvements are also regarded as the protection scope of the present application.

Claims

1. A nickel alloy composite tube hot extrusion mechanism, characterized in that: The adjusting frame (32) comprises an adjusting frame (32), wherein two first circular holes are provided on the adjusting frame (32), wherein a first support ring (56) is fixedly provided in one of the first circular holes, and a second support ring (7) is fixedly provided in the other first circular hole; four gear support plates (55) are provided on the outer wall of the first support ring (56), a rotating shaft (52) is rotatably provided on the gear support plate (55), a pinion (54) is fixedly provided on one end of the rotating shaft (52), and the other end of the rotating shaft (52) is rotatably mounted on the inner wall of the adjusting frame (32), and a correction wheel (53) is fixedly provided on the rotating shaft (52); A large gear (57) is fixedly mounted on the outer wall of the first support ring (56), and the large gear (57) is meshed with four small gears (54); the other end of one of the rotating shafts (52) extends out of the adjustment frame (32), and is externally connected to a driving motor. Under the rotation of the driving motor, the large gear (57) is coordinated with the four small gears (54) to rotate synchronously, thereby driving the correction wheel (53) to rotate synchronously, thereby correcting and surface treating the blank.

2. A nickel alloy composite tube hot extrusion mechanism according to claim 1, characterized in that: The outer wall of the second support ring (7) is provided with four connecting rods (5), each connecting rod (5) is provided with a circular ring (51), and the circular ring (51) is rotatably sleeved on the rotating shaft (52) to form support for the rotating shaft (52), so that the correction wheel (53) is more stable during operation.

3. A nickel alloy composite tube hot extrusion mechanism according to claim 2, characterized in that: A base (1) is provided below the adjusting frame (32), and a first fixing plate (3) and a second fixing plate (31) are mounted on the base (1). The first fixing plate (3) and the second fixing plate (31) are respectively fixedly connected to the adjusting frame (32) so as to form a suspended state at the bottom of the adjusting frame (32). A second circular hole is provided on each of the first fixing plate (3) and the second fixing plate (31), and the second circular hole has the same diameter as the first circular hole and is in communication with the first circular hole.

4. A nickel alloy composite tube hot extrusion mechanism according to claim 3, characterized in that: A second support plate (6) is provided on the base (1), a mold (51) is provided on the second support plate (6), the other end of the mold (51) is mounted on the second fixing plate (31), and the mold (51) is in communication with the second circular hole.

5. The nickel alloy composite tube hot extrusion mechanism according to claim 4, characterized in that: A first support plate (11) is provided on the base (1), and a pushing assembly (2) is provided on the first support plate (11). The pushing assembly (2) heats the blank and pushes it into the die to form hot extrusion of the blank.

6. A nickel alloy composite tube hot extrusion mechanism according to claim 5, characterized in that: The pushing assembly (2) comprises a heating ring (21), a placement ring (22), a pushing ring (23), an oil cylinder (24) and a push plate (25); the first support plate (11) is provided with a pushing ring (23), the pushing ring (23) is provided with a placement ring (22), and the placement ring (22) is provided with a heating ring (21); the pushing ring (23) is provided with an oil cylinder (24), and the output end of the oil cylinder (24) is provided with a push plate (25).

7. The nickel alloy composite tube hot extrusion mechanism according to claim 6, characterized in that: The placement ring (22) is in a semicircular shape and is used to place the blank. Under the push of the oil cylinder (24), the push plate (25) pushes the blank into the heating ring (21) to heat the blank.

8. The nickel alloy composite tube hot extrusion mechanism according to claim 7, characterized in that: The heating ring (21), the placement ring (22), the first support ring (56) and the second support ring (7) all have the same inner diameter and are connected to each other, and their mid-vertical lines are on the same line.

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