External cross-rib thin-wall cylinder hot expansion and extrusion equipment and manufacturing method

Abstract

A device and manufacturing method for hot expansion and extrusion of thin-walled cylinders with external cross ribs, comprising: a motion module and a forming module sequentially arranged on a spinning machine body, and a heating module connected to the motion module, wherein: the motion module controls the heating module to adjust the heating position of the cylinder blank, and the spinning machine body drives the forming module to perform the hot expansion and extrusion process. The present invention uses arc-shaped infrared heating to achieve heating and temperature control of the cylinder blank without interfering with roller processing, thereby improving the plastic fluidity of the material. At the same time, through horizontal and vertical motion devices, flexible heating of components of different sizes is achieved. The processing characteristics of small feed rate and multiple passes are utilized to realize the manufacture of thin-walled cylinders with external cross ribs of high hardness materials, and improve the rib aspect ratio of the thin-walled cylinders with external ribs.

Description

Technical Field

[0001] The present invention relates to a technology in the field of metal plastic processing, in particular to a device for hot-expanding and rotary-extruding a thin-walled cylinder with external cross ribs and a manufacturing method thereof. Background Art

[0002] With the development of the aerospace industry, the demand for high-strength and high-performance thin-walled cylindrical components with ribs continues to increase. When using integral forming methods to manufacture ribbed components with larger rib aspect ratios and higher material strength, room temperature forming can lead to problems such as insufficient equipment tonnage and difficulty in plastic deformation of the material. Therefore, thermal energy fields are needed to assist in the forming of ribbed components. Common heating methods currently include laser heating, high-frequency induction heating, flame spray gun heating, and infrared heating. Summary of the Invention

[0003] In view of the structural limitations of the existing technology, the present invention cannot heat the tube blank during the unfolding and extrusion process, resulting in the deficiency that only materials with low hardness and low strength can be processed. The present invention proposes a hot unfolding and extrusion device and manufacturing method for thin-walled tubes with external cross ribs. Through arc infrared heating, the tube blank can be heated and the temperature can be controlled without interfering with roller processing, thereby improving the plastic fluidity of the material. At the same time, through horizontal and vertical motion devices, flexible heating of components of different sizes can be achieved. The processing characteristics of small feed rate and multiple passes are utilized to realize the manufacture of thin-walled tubes with external cross ribs made of high hardness materials, thereby improving the aspect ratio of the ribs of the thin-walled tubes with external ribs.

[0004] The present invention is achieved through the following technical solutions:

[0005] The present invention relates to a device for hot expansion and extrusion of thin-walled cylinders with external cross ribs, comprising: a motion module and a forming module sequentially arranged on a spinning machine body, and a heating module connected to the motion module, wherein: the motion module controls the heating module to adjust the heating position of the cylinder blank, and the spinning machine body drives the forming module to perform a hot expansion and extrusion process.

[0006] The motion module comprises: an equipment fixing device, a horizontal motion device movably arranged on the equipment fixing device, and a vertical motion device arranged on the horizontal motion device, wherein: the vertical motion device is connected to the heating module.

[0007] The equipment fixing device includes: a rear bracket, a rear crossbeam, a reinforced crossbeam, a guide rail, a fixing buckle, a front crossbeam, an oblique support, a front bracket and an adjustment base, wherein: the rear crossbeam, the reinforced crossbeam and the front crossbeam are respectively vertically connected to the double guide rails to reinforce the guide rails, and the guide rails are connected to the spinning machine body through fixing buckles; the rear bracket and the front bracket are vertically arranged and connected to the guide rails.

[0008] The horizontal motion device includes: a mobile platform, a handle, a guide rail trolley, a locking module and a limit block, wherein: two guide rail trolleys are respectively arranged on both sides of the mobile platform, the guide rail trolley is movably arranged inside the guide rail, driving the heating module to move horizontally; the locking module is arranged under the guide rail trolley to lock the position of the guide rail trolley; the limit block is arranged at the top of the guide rail to limit the maximum displacement distance of the guide rail trolley.

[0009] The heating module includes: a heating shell, an infrared heating lamp and a transformer arranged along an arc inside the heating shell, and a cooling fan arranged above the heating shell, wherein: connecting plates for cooperating with the bottom of the U-shaped plate are provided on both sides of the heating shell, and the top of the U-shaped plate is connected to the push rod.

[0010] The vertical motion device includes: an electric push rod and a vertical slide rail respectively arranged on the upper and lower sides of the mobile platform, wherein: the electric push rod cooperates with the U-shaped plate in the heating module to realize the vertical movement of the heating module; the four vertical slide rails cooperate with the mobile platform to assist the vertical movement of the heating module and ensure the stability of the movement.

[0011] The forming module includes: a core mold, a main gear, a limiting gear ring and a tail top arranged in sequence, and a pair of tool units with transmission gears arranged on both sides of the main gear and the limiting gear ring in a two-sided distribution manner, wherein: the limiting gear ring and the tail top respectively contact the upper and lower ends of the tube blank to be processed and constrain it axially, and the core mold is interference fit with the tube blank to be processed and constrains it radially.

[0012] The tool unit includes: a tool base, a tool holder, a tool shaft, and a transmission gear and a roller arranged on the tool shaft, wherein: the transmission gear is engaged with the main gear, and the main gear is used to The angular velocity of the active rotation drives the transmission gear and roller to The angular velocity of rotation satisfies , where: Z1 is the design number of teeth of the reinforced member, and Z2 is the design number of teeth of the roller.

[0013] The present invention relates to a method for hot-expanding and rotary extrusion of a thin-walled cylinder with external ribs based on the above-mentioned equipment. First, the axial and circumferential directions of the cylinder blank are constrained by a limiting gear ring and a tail top, and the radial direction of the cylinder blank is partially constrained by a core mold; after adjusting the horizontal motion device and the vertical motion device so that the heating module moves to just above the cylinder blank, the spinning machine is started to control the tool holder to move away from the cylinder blank, and the cylinder blank is allowed to rotate, and the heating temperature is set at the same time, and the cylinder blank is preheated by infrared; finally, the output power of the heating module is adjusted to continuously keep the cylinder blank warm, and the spinning machine is controlled at the same time to balance the lateral force of the processing process, and the roller on the other side moves radially toward the center of the cylinder blank, and the cylinder blank is plastically processed to manufacture a thin-walled cylindrical part with external cross ribs.

[0014] The thermal expansion and rotational extrusion specifically includes:

[0015] Step 1: Adjust the control box and operate the horizontal motion device and the vertical motion device so that the spatial position of the heating module is located directly above the tube blank to heat 1 / 4 of the tube blank.

[0016] Step 2: Start the spinning machine and control the roller to move away from the tube blank while the main gear and the transmission gear remain in meshing state; let the core mold drive the tube blank to rotate, and at the same time set the target heating temperature of the heating module to preheat the tube blank by infrared.

[0017] Step 3: Adjust the output power of the heating module to keep the tube blank warm continuously, control the spinning machine at the same time, and balance the lateral force of the processing process. The tool holder on the other side moves radially toward the center of the tube blank at the expected speed according to the program, and plastic processing is performed on the tube blank through the roller to produce a thin-walled cylindrical part with external cross ribs.

[0018] The lateral force of the balancing process is to set the roller on one side to be 1 mm away from the tail top.

[0019] Technical Effects

[0020] This invention utilizes horizontal and vertical motion modules to achieve spatial movement and positioning of the heating module. Utilizing infrared heating, it ensures uniform heating of cylinders of varying sizes to varying specified temperatures without interfering with roller processing. The dual-sided tool holder structure allows one side of the tool holder to balance lateral forces while the other side performs the forming function, resulting in a smoother extrusion process.

[0021] Compared with the existing device in which the extrusion forming is performed only by the tool holder and roller, and the roller and the tube blank may slip in the early stage of forming, resulting in the problem of rib misalignment in the initial forming process, the present invention uses a main gear and transmission gear structure, in which the transmission gear and the roller are fixed on a shaft, thereby ensuring the transmission ratio of the main shaft and the tool.

[0022] Compared with the existing device in which the axial constraint is achieved by a circular ring similar to a tail top in front of the tube blank, which is not only large in size but also causes the tube blank to rotate relative to the core mold during the forming process, the present invention can ensure the axial constraint of the tube blank through the toothed structure of the limiting gear ring. At the same time, the toothed structure clamps the tube blank to prevent the tube blank from rotating displacedly relative to the core mold during the forming process. It can realize the manufacture of thin-walled cylinders with external cross ribs of different rib types and sizes, realize the hot expansion and rotary extrusion forming function of thin-walled cylinders with external cross ribs, can manufacture thin-walled cylinders with external ribs made of high hardness materials, and improve the rib aspect ratio of thin-walled cylinders with external ribs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is the axonometric drawing of the drive module and the heating module;

[0025] Figure 3 This is the main view of the driver module;

[0026] Figure 4 for Figure 3 Cross-sectional view at the dotted box;

[0027] Figure 5 This is a bottom view of the heating module;

[0028] Figure 6 This is a main cross-sectional view of the heating module;

[0029] Figure 7 This is the axonometric drawing of the forming module;

[0030] Figure 8 It is a cross-sectional view of the forming module when it is working;

[0031] Figure 9 is the structural diagram of the component;

[0032] Figure 10 It is the structural diagram of the roller;

[0033] In the figure: (a) is the initial cylindrical blank structure with a diameter of 350 mm; (b) is the component structure of Example 2; (c) is the initial cylindrical blank structure with a diameter of 550 mm; (e) is the component structure of Example 3; (f) is the component structure of Example 4;

[0034] In the figure: (A) is the roller structure of Example 2; (B) is the roller structure of Example 3; (C) is the low roller structure of Example 3; (D) is the high roller structure of Example 3;

[0035] In the figure: rear bracket 1, rear crossbeam 2, reinforcement crossbeam 3, guide rail 4, fixing buckle 5, front crossbeam 6, oblique support 7, front bracket 8, electric push rod 9, mobile platform 10, vertical slide rail 11, handle 12, adjustment base 13, guide rail trolley 14, locking module 15, limit block 16, spinning machine body 17, infrared heating lamp 18, heating shell 19, connecting plate 20, cooling fan 21, fan shell 22, U-shaped plate 23, heating plug 24, transformer 25, tool base 26, tool holder 27, end cover 28, transmission gear 29, main gear 30, tube blank 31, core mold 32, limit gear ring 33, tool shaft 34, roller 35, tail top 36. DETAILED DESCRIPTION

[0036] Example 1

[0037] like Figures 1 to 7As shown, this embodiment relates to a hot expansion and extrusion device for a thin-walled cylinder with external cross ribs, comprising: a motion module a, a heating module b, a forming module c and a spinning machine body 17, wherein: the heating module b is connected to the motion module a, the motion module a and the forming module c are arranged on the spinning machine body 17, and the spinning machine body 17 provides a power source for the forming module c.

[0038] The motion module a comprises: an equipment fixing device a1, a horizontal motion device a2 movably arranged on the equipment fixing device a1, and a vertical motion device a3 arranged on the horizontal motion device, wherein: the vertical motion device a3 is connected to the heating module b.

[0039] like Figure 2 As shown, the equipment fixing device a1 includes: a rear bracket 1, a rear crossbeam 2, a reinforcement crossbeam 3, a guide rail 4, a fixing buckle 5, a front crossbeam 6, an inclined support 7, a front bracket 8, and an adjustment base 13, wherein: the rear crossbeam 2, the reinforcement crossbeam 3, and the front crossbeam 6 are respectively vertically connected to the double guide rails 4 to reinforce the guide rails 4, and the guide rails 4 are connected to the spinning machine body 17 through the fixing buckle 5; the rear bracket 1 and the front bracket 8 are vertically arranged and connected to the guide rails 4.

[0040] like Figure 2-Figure 4 As shown, the horizontal motion device a2 includes: a mobile platform 10, a handle 12, a guide rail trolley 14, a locking module 15 and a limit block 16, wherein: two guide rail trolleys 14 are respectively arranged on both sides of the mobile platform 10, and the guide rail trolley 14 is movably arranged inside the guide rail 4 to drive the heating module to move horizontally; the locking module 15 is arranged under the guide rail trolley 14 to lock the position of the guide rail trolley 14; the limit block 16 is arranged at the top of the guide rail 4 to limit the maximum displacement distance of the guide rail trolley 14.

[0041] The vertical motion device a3 includes: an electric push rod 9 and a vertical slide rail 11 respectively arranged on the upper and lower sides of the mobile platform 10, wherein: the electric push rod 9 cooperates with the U-shaped plate 23 in the heating module to realize the vertical movement of the heating module; the four vertical slide rails 11 cooperate with the mobile platform 10 to assist the vertical movement of the heating module and ensure the stability of the movement.

[0042] like Figure 5 and Figure 6 As shown, the heating module b includes: a heating shell 19, an infrared heating lamp 18 and a transformer 25 arranged along an arc inside the heating shell 19, and a cooling fan 21 arranged above the heating shell 19, wherein: connecting plates 20 for connecting to the vertical slide rail 11 are provided on both sides of the outside of the heating shell 19, and a U-shaped plate 23 for connecting to the electric push rod 9 is provided above the connecting plate 20.

[0043] There are nine infrared heating lamps 18 for heating the tube blank and controlling the heating temperature.

[0044] like Figure 6 As shown, the heating shell 19 has a square structure and a 1 / 4 arc structure on the lower surface. This structure can ensure that the cooling fan 21 and the fan shell 22 are arranged on its upper surface, the connecting plate 20 is arranged on both sides thereof, and the infrared heating lamp tube 18 and the transformer 25 are arranged on its lower surface to achieve heating of the tube blank 31.

[0045] like Figure 7 As shown, the forming module c includes: a core mold 32, a main gear 30, a limiting gear ring 33 and a tail top 36 arranged in sequence, and a pair of tool units with transmission gears 29 respectively arranged on both sides of the main gear 30 and the limiting gear ring 33. The limiting gear ring 33 and the tail top 36 are in contact with the upper and lower ends of the tube blank 31 to be processed respectively, and the axial direction of the tube blank 31 to be processed is constrained. The core mold 32 is interference fit with the tube blank 31 to be processed, and the radial direction of the tube blank 31 to be processed is constrained.

[0046] The limiting gear ring 33 constrains the cylindrical blank in the circumferential direction and the axial direction through the tooth structure, thereby preventing the cylindrical blank 31 from rotating dislocated relative to the core mold 32 during the forming process.

[0047] like Figure 7 and Figure 8 As shown, the tool unit includes: a tool base 26, a tool holder 27, a tool shaft 34, and a transmission gear 29 and a roller 35 arranged on the tool shaft 34, wherein: the transmission gear 29 is engaged with the main gear 30, and the transmission gear 29 and the roller 35 are driven to rotate by the active rotation of the main gear 30.

[0048] like Figure 8 As shown, the distribution on both sides means that the roller 35 in the tool unit on one side is flush with the tail top 36 and is 1 mm apart radially, and the roller 35 in the tool unit on the other side is tangent to the tube blank 31, and the tube blank 31 is plastically processed to form ribs.

[0049] This embodiment relates to a method for hot-expanding and rotary-extruding a thin-walled cylinder with outer cross ribs based on the above-mentioned equipment, using the following method: Figure 9 (a) shows the initial tube blank with a diameter of 350 mm and Figure 10 The roller shown in (A) has a diameter of 180 mm and contains 9 longitudinal grooves and 1 transverse groove, including:

[0050] 1) Insert the main gear 30, the limiting gear ring 33, and the tube blank 31 into the core mold 32 in sequence, and move the tail top 36 to the end of the tube blank 31 to realize axial and radial constraints on the tube blank 31; perform the tool setting operation to make the roller 35 on one side tangent to the tube blank 31, and at the same time make the transmission gear 29 mesh with the main gear 30; the roller 35 on the other side is flush with the tail top 36, and the radial distance is 1mm, which plays a role in balancing the lateral force during the forming process.

[0051] 2) Move the handle 12 to adjust the horizontal position of the mobile platform 10 to be directly above the tube blank 31, adjust the locking module 15 to fix the horizontal position of the mobile platform 10, start the electric push rod 9, and adjust the vertical position of the heating module to 5-8 mm above the tube blank through the computer control system. Use the computer control system to set the target heating temperature.

[0052] 3) Start the spinning machine and make the tool holder 27 away from the tube blank 31, but ensure that the transmission gear 29 and the main gear 30 are in meshing state, and at the same time, let the tube blank 31 The cylinder 31 is rotated counterclockwise at an angular speed of 1 / 4 inch / min, and the heating module is started to preheat the cylinder 31 by using the infrared heating lamp 18 until the temperature reaches 320°C.

[0053] 4) Use the computer control system to adjust the output power of the heating module to keep the tube blank 31 at 320℃ and the tool holder 27 at a speed of mm / s moves radially toward the tube blank 31, while the main gear 30 moves at The transmission gear 29 drives the roller 35 to rotate counterclockwise at an angular speed of r / min. The cylinder 31 is rotated clockwise at an angular velocity of r / min to perform plastic processing on the cylinder 31. Figure 9 As shown in (b), a component with 18 external longitudinal reinforcements and 1 external transverse reinforcement is gradually formed, and the height of the longitudinal reinforcement and the transverse reinforcement is 5 mm.

[0054] Example 2

[0055] This example involves the preparation of Figure 9 (c) shows the initial tube blank with a diameter of 550 mm and Figure 10 The specific steps for the roller with a diameter of 280 mm and 8 longitudinal grooves and 1 transverse groove shown in (B) include:

[0056] 1) Insert the main gear 30, the limiting gear ring 33, and the tube blank 31 into the core mold 32 in sequence, and move the tail top 36 to the end of the tube blank 31 to realize axial and radial constraints on the tube blank 31; perform the tool setting operation to make the roller 35 on one side tangent to the tube blank 31, and at the same time make the transmission gear 29 mesh with the main gear 30; the roller 35 on the other side is flush with the tail top 36, and the radial distance is 1mm, which plays a role in balancing the lateral force during the forming process.

[0057] Move the handle 12 to adjust the horizontal position of the mobile platform 10 to just above the tube blank 31. Adjust the locking module 15 to fix the horizontal position of the mobile platform 10. Start the electric push rod 9. Use the computer control system to adjust the vertical position of the heating module to 5-8 mm above the tube blank. Use the computer control system to set the target heating temperature.

[0058] 3) Start the spinning machine and keep the tool holder 27 away from the tube blank 31, but ensure that the transmission gear 29 and the main gear 30 are in meshing state. At the same time, let the tube blank 31 rotate counterclockwise at an angular velocity of 20r / min, start the heating module, and use the infrared heating lamp 18 to preheat the tube blank 31 until it reaches 350℃.

[0059] 4) The output power of the heating module is adjusted by the computer control system to keep the cylinder 31 at 350°C. The tool holder 27 is moved radially toward the cylinder 31 at a speed of 0.1 mm / r. At the same time, the main gear 30 rotates counterclockwise at an angular speed of 20 r / min, and the transmission gear 29 drives the roller 35 to rotate clockwise at an angular speed of 32 r / min to perform plastic processing on the cylinder 31. Figure 9 As shown in (d), a component with 16 external longitudinal reinforcements and 1 external transverse reinforcement is gradually formed, and the height of the longitudinal reinforcement and the transverse reinforcement is 7 mm.

[0060] The present invention can realize the hot expansion and rotational extrusion of cylinder blanks with different diameters and components with different rib sparsity by changing the spatial position of the heating module and the structure of the roller.

[0061] Example 3

[0062] This example involves the preparation of Figure 9 (c) shows the initial tube blank with a diameter of 550 mm and Figure 10 The following steps are involved in the following process for the low roller with a diameter of 280 mm and 6 longitudinal grooves and 1 transverse groove, and the high roller with a diameter of 280 mm and 6 high longitudinal grooves, 6 low longitudinal grooves, and 1 transverse groove, as shown in (C)-(D):

[0063] 1) Insert the main gear 30, the limiting gear ring 33, and the tube blank 31 into the core mold 32 in sequence, and move the tail top 36 to the end of the tube blank 31 to realize axial and radial constraints on the tube blank 31; set the low roller 35 on the left tool holder 27, and the high roller 35 on the right tool holder 27, and perform the tool setting operation to make the left and right rollers 35 tangent to the tube blank 31, and at the same time make the transmission gear 29 mesh with the main gear 30.

[0064] 2) Move the handle 12 to adjust the horizontal position of the movable platform 10 to be directly above the tube blank 31. Adjust the locking module 15 to fix the horizontal position of the movable platform 10. Start the electric push rod 9. Adjust the vertical position of the heating module to 5-8 mm above the tube blank through the computer control system. Set the temperature to 350°C using the computer control system.

[0065] 3) Start the spinning machine and move the left and right tool holders 27 away from the tube blank 31. At the same time, rotate the tube blank 31 counterclockwise at an angular velocity of 20 r / min. Start the heating module and use the infrared heating lamp 18 to preheat the tube blank 31 until it reaches 350°C.

[0066] 4) Adjust the power of the heating module, use the heating module to keep the tube blank 31 warm, control the right tool holder, make the right roller 35 and the tail top 36 keep axially flush, and the radial distance 1mm, make the left tool holder 27 move radially toward the tube blank 31 at a speed of 0.1mm / r, and at the same time, the main gear 30 rotates counterclockwise at an angular speed of 20r / min, and the transmission gear 29 drives the low roller 35 to rotate clockwise at an angular speed of 32r / min, and plastic processing is performed on the tube blank 31 to form a product as shown in the figure. Figure 9 (d) shows a member with 6 longitudinal bars and 1 transverse bar, with the bar height of the longitudinal and transverse bars being 4 mm.

[0067] 5) Move the left tool holder 27 away from the tube blank 31, and move the left roller 35 to a position where it is axially flush with the tail top 36 and has a radial distance of 1 mm. Move the right tool holder 27 to the tube blank 31 and move radially toward the tube blank 31 at a speed of 0.1 mm / r. At the same time, the main gear 30 rotates clockwise at an angular speed of 20 r / min, and the transmission gear 29 drives the high roller 35 to rotate counterclockwise at an angular speed of 32 r / min. Figure 9 As shown in (e), a component with 6 low longitudinal bars, 6 high longitudinal bars and 1 external transverse bar is gradually formed. The height of the low longitudinal bars is 3 mm, and the height of the high longitudinal bars and transverse bars is 7 mm.

[0068] Compared with the currently common laser heating which can only perform point heating and cannot meet the demand for temperature control of the entire cylinder during the unfolding and extrusion process, this device uses arc-shaped infrared lamp heating to achieve heating and insulation of the external cross-ribbed thin-walled cylinder during the unfolding and extrusion process without interfering with the normal operation of the rollers. The design of the motion module can greatly change the spatial position of the heating module. Combined with rollers of different structures, it can realize the hot unfolding and extrusion of cylinders of different sizes and components with different rib arrangements.

[0069] The above-mentioned specific implementation can be partially adjusted in different ways by those skilled in the art without departing from the principles and purpose of the present invention. The scope of protection of the present invention shall be based on the claims and shall not be limited by the above-mentioned specific implementation. All implementation schemes within its scope shall be subject to the constraints of the present invention.

Claims

1. A hot expansion and extrusion equipment for thin-walled cylinder with external cross ribs, characterized in that: include: The motion module and the forming module are sequentially arranged on the spinning machine body, and the heating module is connected to the motion module, wherein: the motion module controls the heating module to adjust the heating position of the tube blank, and the spinning machine body drives the forming module to perform the hot expansion and spinning process; The motion module includes: an equipment fixing device, a horizontal motion device movably arranged on the equipment fixing device, and a vertical motion device arranged on the horizontal motion device, wherein: the vertical motion device is connected to the heating module; The forming module includes: a core mold, a main gear, a limit gear ring and a tail top which are arranged in sequence, and a pair of tool units with transmission gears which are respectively arranged on both sides of the main gear and the limit gear ring in a distributed manner, wherein: the limit gear ring and the tail top are respectively in contact with the upper and lower ends of the tube blank to be processed and axially constrain them, and the core mold is interference-fitted with the tube blank to be processed and radially constrains them; The heating module includes: a heating shell, an infrared heating lamp and a transformer arranged along an arc inside the heating shell, and a cooling fan arranged above the heating shell, wherein: connecting plates for cooperating with the bottom of the U-shaped plate are provided on both sides of the heating shell, and the top of the U-shaped plate is connected to the push rod.

2. The external cross rib thin-wall cylinder hot expansion and extrusion equipment according to claim 1 is characterized in that: The equipment fixing device includes: a rear bracket, a rear crossbeam, a reinforced crossbeam, a guide rail, a fixing buckle, a front crossbeam, an oblique support, a front bracket and an adjustment base, wherein: the rear crossbeam, the reinforced crossbeam and the front crossbeam are respectively vertically connected to the double guide rails to reinforce the guide rails, and the guide rails are connected to the spinning machine body through fixing buckles; the rear bracket and the front bracket are vertically arranged and connected to the guide rails.

3. The external cross rib thin-wall cylinder hot expansion and extrusion equipment according to claim 1 is characterized in that: The horizontal motion device includes: a mobile platform, a handle, a guide rail trolley, a locking module and a limit block, wherein: two guide rail trolleys are respectively arranged on both sides of the mobile platform, the guide rail trolley is movably arranged inside the guide rail, driving the heating module to move horizontally; the locking module is arranged under the guide rail trolley to lock the position of the guide rail trolley; the limit block is arranged at the top of the guide rail to limit the maximum displacement distance of the guide rail trolley.

4. The external cross rib thin-wall cylinder hot expansion and extrusion equipment according to claim 1 is characterized in that: The vertical motion device includes: an electric push rod and a vertical slide rail respectively arranged on the upper and lower sides of the mobile platform, wherein: the electric push rod cooperates with the U-shaped plate in the heating module to realize the vertical movement of the heating module; the four vertical slide rails cooperate with the mobile platform to assist the vertical movement of the heating module and ensure the stability of the movement.

5. The external cross rib thin-wall cylinder hot expansion and extrusion equipment according to claim 1 is characterized in that: The tool unit includes: a tool base, a tool holder, a tool shaft, and a transmission gear and a roller arranged on the tool shaft, wherein: the transmission gear is engaged with the main gear, and the main gear is used to The angular velocity of the active rotation drives the transmission gear and roller to The angular velocity of rotation satisfies , where: Z1 is the design number of teeth of the reinforced member, and Z2 is the design number of teeth of the roller.

6. A method for hot-expanding and rotary-extruding a thin-walled outer rib cylinder based on the apparatus according to any one of claims 1 to 5, characterized in that: First, the axial and circumferential directions of the tube blank are constrained by the limiting gear ring and the tail top, and the radial direction of the tube blank is partially constrained by the core mold; after adjusting the horizontal motion device and the vertical motion device so that the heating module moves to the top of the tube blank, the spinning machine is started to control the tool holder away from the tube blank, and the tube blank is allowed to rotate. At the same time, the heating temperature is set and the tube blank is preheated by infrared; finally, the output power of the heating module is adjusted to continuously keep the tube blank warm, and the spinning machine is controlled at the same time to balance the lateral force of the processing process. The roller on the other side moves radially toward the center of the tube blank, and the tube blank is plastically processed to produce a thin-walled cylindrical part with external cross ribs.

7. The method for manufacturing an outer rib thin-walled cylinder by hot expansion and extrusion according to claim 6, characterized in that: The thermal expansion and rotational extrusion specifically includes: Step 1: Adjust the control box and operate the horizontal motion device and the vertical motion device so that the heating module is located directly above the tube blank to heat 1 / 4 of the tube blank. Step 2: Start the spinning machine to control the roller to move away from the tube blank while the main gear and the transmission gear are kept in meshing state; the core mold drives the tube blank to rotate, and at the same time, the target heating temperature of the heating module is set to preheat the tube blank by infrared; Step 3: Adjust the output power of the heating module to keep the tube blank warm continuously, control the spinning machine at the same time, and balance the lateral force of the processing process. The tool holder on the other side moves radially toward the center of the tube blank at the expected speed according to the program, and plastic processing is performed on the tube blank through the roller to produce a thin-walled cylindrical part with external cross ribs.

8. The method for manufacturing an outer rib thin-walled cylinder by hot expansion and rotary extrusion according to claim 6 or 7, characterized in that: The lateral force of the balancing process is to set the roller on one side to be 1 mm away from the tail top.

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