Method for assembling a multi-rotation spinning cylinder

Abstract

The application discloses a multi-rotation cycle spinning cylinder assembling method, and belongs to the technical field of spinning manufacturing; the assembling method uses an assembling ring and a discharging fork on a spinning roller seat to realize quick assembling. The assembling method is as follows: a process head end of a cylinder after heat treatment is sleeved on a spinning core mold, so that the inner diameter of the process head end is attached to the outer diameter of the spinning core mold; the assembling ring is sleeved on the outer diameter of the cylinder, so that one end surface of the assembling ring is in contact with the process head end surface of a spinning roller stop position; the axial position of the discharging fork on the spinning roller seat is adjusted, so that the discharging fork is close to the outer end surface of the assembling ring; the spinning roller seat is moved along the cylinder mounting direction, the assembling ring is pushed by the discharging fork to bring the cylinder into the end of the spinning core mold main shaft, and the assembling is completed. The application solves the problems of assembling difficulty, time consumption and labor intensity in the process of assembling the deformed spinning cylinder to the spinning core mold again during multi-rotation cycle spinning.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of spinning manufacturing, and particularly relates to a multi-rotation spinning cylinder assembling method, which is mainly used for multi-rotation spinning forming of alloy structural steel, titanium alloy, ultra-high strength steel and other cylindrical parts in the fields of aviation, aerospace and petroleum. BACKGROUND

[0002] The combustion chamber shell of a solid rocket engine is generally composed of a front connecting piece, a cylinder and a rear connecting piece, wherein the cylinder is a thin-walled piece, and the material is generally ultra-high strength steel, which is formed by strong spinning.

[0003] When the cylinder is spun, the cylinder spinning blank is sleeved to the spinning core mold close to the spindle end of the machine tool. When the total spinning thinning rate is large and exceeds the material limit thinning rate, a long and thin-walled cylinder is generally formed by multi-pass and double-rotation spinning. In double-rotation spinning, 1-3 passes of strong spinning are first performed, then the spinning cylinder is unloaded from the core mold, the material plasticity is restored by heat treatment, and then 1-3 passes of strong spinning are performed. Since the gap between the core mold and the cylinder is small, the deformation of the thin-walled cylinder caused by high-temperature heat treatment and the deformation caused by stress release of the cylinder make it difficult for the cylinder to be assembled to the core mold by manual work.

[0004] Referring to FIG. 1, Figure 1 , Figure 1 FIG. 1 is a schematic view of a multi-rotation spinning cylinder brought into a spinning core mold by a spinning wheel. When the strong spinning cylinder is assembled again after heat treatment, the process head of the cylinder close to the spindle end has a small deformation because it does not participate in the first rotation spinning. Therefore, the head end is assembled to the core mold first, but the remaining length of the cylinder cannot be assembled to the spinning core mold by manual work because of the deformation. At present, the method of synchronously bringing in multiple spinning wheels is mainly used for assembly. When brought in, the multiple spinning wheels need to be adjusted synchronously, and the multiple spinning wheels are moved to the vicinity of the process head of the cylinder. The spinning wheels are slowly pressed close to the cylinder manually, that is, the multiple spinning wheels are adjusted to the coaxial, same radial and close to the process head position. The whole process needs to be adjusted by multiple people to avoid the spinning wheels being pressed on the spinning cylinder. As shown in FIG. 2, Figure 1 After the spinning wheel position is adjusted, the spinning wheel is stopped at the position of the first rotation spinning wheel with the front angle and working round angle of the spinning wheel abutting against the process head. The cylinder is assembled to the spindle end of the core mold machine tool by moving the spinning wheel seat and driving the cylinder by the spinning wheel.

[0005] The assembly method of multi-rotary wheel synchronous substitution has defects of time-consuming and laborious, because the spinning process generally adopts staggered spinning, and the assembly method of multi-rotary wheel synchronous substitution needs to adjust each rotary wheel to be synchronous, which makes it necessary to adjust the rotary wheel to be synchronous before assembling each cylinder, one person needs to operate the spinning machine, and the other person needs to observe the distance between the rotary wheel and the head in the vicinity of the rotary wheel, slowly press down the rotary wheel in the manual state, when the rotary wheel approaches the cylinder, change to stepping, the stepping unit is 0.1mm-1mm, until the rotary wheel is lowered to the rotary wheel stop position of one spinning process. Then slowly press down each rotary wheel in the manual state until the rotary wheel is lowered to the rotary wheel stop position of one spinning process, and the cylinder is assembled by the front angle and working circle angle of the multiple rotary wheels, and then the staggered distance of the rotary wheel is adjusted for spinning. The radial adjustment is relatively easy through the control adjustment of the spinning equipment, but the axial adjustment is quite difficult, because each spinning wheel is fixed on the equipment through 8 bolts, the spinning wheel needs to be disassembled and assembled when adjusted, needs to be operated by multiple people and takes a long time. Moreover, the synchronous adjustment of the rotary wheel is only used for bringing in the cylinder, and the rotary wheel needs to be adjusted to the original staggered distance state for secondary spinning. Therefore, the method of multi-rotary wheel synchronous substitution occupies a large amount of labor and time.

[0006] In order to avoid the synchronous adjustment of the rotary wheel, there is also an operation of bringing in the spinning cylinder by a single rotary wheel, which is more labor-saving. When operating, one person needs to operate the spinning machine, and the other person needs to observe the distance between the rotary wheel and the process head in the vicinity of the rotary wheel, slowly press down the rotary wheel in the manual state, when the rotary wheel approaches the cylinder, change to stepping, the stepping unit is 0.1mm-1mm, until the rotary wheel is lowered to the rotary wheel stop position of one spinning process. However, since the thrust of the rotary wheel seat is large, the spinning cylinder is brought in by a single rotary wheel, which causes uneven force on the cylinder, and the force is transmitted to the core mold or the main shaft of the machine tool, which may cause damage to the core mold or the main shaft interface of the machine tool.

[0007] Therefore, it is necessary to design a multi-rotary process spinning cylinder assembly method to solve the above problems. SUMMARY

[0008] Technical problems to be solved:

[0009] In order to avoid the defects of the prior art, the present application provides a multi-rotary process spinning cylinder assembly method, a special tool assembly ring is designed to be assembled on the to-be-assembled cylinder, and an outer unloading fork is installed on the rotary wheel seat, the rotary wheel seat is moved by operating the spinning equipment, the assembly ring is pushed by the unloading fork, and the deformed spinning cylinder after heat treatment can be quickly assembled. The assembly method makes the cylinder receive force uniformly, the force of the rotary wheel will not be transmitted to the spinning core mold or the main shaft of the machine tool, avoids damage to the spinning core mold or the main shaft interface caused by the single rotary wheel, and avoids the problem of time-consuming and laborious adjustment of the synchronous of each rotary wheel in the assembly method of multi-rotary wheel synchronous substitution.

[0010] Therefore, the application solves the problem that it is difficult to assemble the cylinder to the spinning core mold again after one spinning process and heat treatment due to the deformation of the cylinder.

[0011] The technical scheme of the application is: a kind of assembly method of multi-rotation spinning cylinder, the assembly method uses assembly ring, the assembly ring is annular, the inner diameter and the outer diameter are coaxial, the end face of both ends is parallel and vertical to the axis;The inner diameter size of the assembly ring is 0.6-1.5mm larger than the outer diameter of the cylinder after the first rotation, and the two ends of the inner diameter are rounded corners;

[0012] The specific steps of the assembly method of the multi-rotation spinning cylinder are:

[0013] Step 1: the process head end of the cylinder after one rotation and heat treatment is sleeved on the spinning core mold, the posture of the cylinder is adjusted, the inner diameter of the process head end of the cylinder is matched with the outer diameter of the spinning core mold;

[0014] Step 2: install the assembly ring: the assembly ring is sleeved on the outer diameter of the cylinder, the position of the assembly ring is adjusted, the end face of the assembly ring facing the process head is in contact with the process head end face of the one-rotation spinning wheel stop position;

[0015] Step 3: adjust the position of the unloading fork: control the spinning equipment, adjust the axial position of the unloading fork on the spinning wheel seat, make the unloading fork close to the end face of the assembly ring away from the process head, and extend the unloading fork;

[0016] Step 4: control the spinning equipment, move the spinning wheel seat along the installation direction of the cylinder, bring the cylinder into the end of the spinning core mold machine tool, make the end face of the process head abut against the unloading ring sleeved on the end of the spinning core mold, and complete the assembly of the cylinder.

[0017] The further technical scheme of the application is: the rounded corners of the inner diameter of the assembly ring are R6-R8.

[0018] The further technical scheme of the application is: the outer diameter of the assembly ring is 30-60mm larger than the outer diameter of the process head of the cylinder.

[0019] The further technical scheme of the application is: the thickness of the assembly ring meets the requirement of not deforming during use.

[0020] The further technical scheme of the application is: the thickness of the assembly ring is 30mm.

[0021] The further technical scheme of the application is: the unloading fork has two, the included angle of the two unloading forks is 120°, and the two unloading forks are symmetrically arranged on both sides of the axis of the assembly ring.

[0022] The further technical scheme of the application is: the assembly method is used for multi-rotation spinning assembly of cylindrical parts of alloy structural steel, ultra-high strength steel and titanium alloy material.

[0023] A processing method of a multi-rotation spinning cylinder adopting the assembling method, steps are as follows:

[0024] Step 1: according to the size requirement of the design drawing, a pipe or a forged cylindrical blank is selected;

[0025] Step 2: the blank is subjected to softening heat treatment;

[0026] Step 3: the blank is numerically controlled to the spinning required size to obtain a spinning blank;

[0027] Step 4: the spinning blank is sleeved on the spindle end of the spinning core mold;

[0028] Step 5: the spinning blank is subjected to 1-3 passes of staggered distance strong spinning to obtain a one-rotation spinning cylinder;

[0029] Step 6: the spinning cylinder is subjected to heat treatment annealing;

[0030] Step 7: the spinning cylinder after heat treatment is assembled with the discharging fork, the size of the assembling ring is selected according to the size of the spinning cylinder, the assembling ring is sleeved on the process head end of the first rotation of the spinning cylinder, the axial position of the discharging fork is adjusted to the end surface near the back of the assembling ring, the discharging fork is stretched out, the spinning cylinder is brought into the spindle end of the spinning core mold along the installation direction of the cylinder by moving the spinning wheel seat until the outer end surface of the process head abuts against the discharging ring, and the assembling is completed;

[0031] Step 8: the assembled spinning cylinder is subjected to 1-3 passes of staggered distance strong spinning again;

[0032] Step 9: steps 6-8 are repeated until the cylinder reaches the final spinning required size.

[0033] Beneficial effects

[0034] The multi-rotation spinning cylinder assembling method has the beneficial effects that the method is suitable for the reassembly of a multi-rotation cylinder, the special assembling ring is designed and used, the discharging fork on the spinning wheel seat of the spinning machine is used, and the assembling of the deformed spinning cylinder after heat treatment can be quickly completed, and the problems of difficult assembling, time-consuming and labor-consuming of the deformed spinning cylinder after heat treatment when the multi-rotation spinning cylinder is assembled on the spinning core mold are solved.

[0035] The method is suitable for the multi-rotation spinning of alloy structural steel, ultrahigh strength steel, titanium alloy and other material cylindrical parts, and the assembling of the deformed spinning cylinder after heat treatment can be quickly completed. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The installation schematic diagram for bringing the barrel into the spinning core mold through the multiple spinning wheels;

[0037] Figure 2 The right view of Figure 1 ;

[0038] Figure 3 The installation schematic diagram for bringing the barrel into the spinning core mold through the assembly ring matched with the unloading fork according to the present application;

[0039] Figure 4 The right view of Figure 3 ;

[0040] Reference signs: 1. machine tool spindle, 2. unloading ring, 3. spinning core mold, 4. barrel, 41. process head, 5. spinning wheel, 6. assembly ring, 7. unloading fork, V. the direction indicated is the barrel installation direction. DETAILED DESCRIPTION

[0041] The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0042] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings based on 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 therefore cannot be understood as indicating or implying that the devices or elements 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.

[0043] Referring to Figures 1-2 , the installation schematic diagram for bringing the multiple-pass spinning barrel 4 into the spinning core mold 3 through a spinning pass and heat treatment after the multiple-pass spinning is shown in the figure, the direction indicated by V in the figure is the installation direction of the barrel 4, i.e. the direction of the spinning wheel 5, the position of the barrel 4 shown by the dashed line in the figure is the position of the barrel 4 installed in place, and the position of the spinning wheel 5 shown by the dashed line in the figure is the position of the spinning wheel 5 after the barrel 4 is installed in place. In order to solve the problem that the deformed spinning barrel 4 is difficult to be manually assembled into the spinning core mold 3 again during the multiple-pass spinning described in the background art, and that the damage to the spinning core mold 3 or the interface of the machine tool spindle 1 is easily caused by the single spinning wheel 5, and that the adjustment of the synchronization of each spinning wheel 5 is required for the synchronous assembly through the multiple spinning wheels 5, which is time-consuming and laborious, a spinning barrel assembly method is proposed, which is simple to operate, high in installation efficiency, and has the advantages of saving time and labor.

[0044] Referring toFigures 3-4 The application provides an assembling method of multi-rotation spinning cylinder, which uses a special assembling ring 6, cooperates with inherent unloading fork 7 on spinning equipment spinning wheel seat, and realizes the assembling of multi-rotation spinning cylinder 4 through simple operation.

[0045] The assembling ring 6 is annular, the inner diameter and the outer diameter are coaxial, the two end faces of the assembling ring 6 are parallel and perpendicular to the axis of the assembling ring 6. The inner diameter of the assembling ring 6 is 0.6-1.5 mm larger than the outer diameter of the cylinder 4 after the first rotation, and the two ends of the inner diameter of the assembling ring 6 are rounded with R6-R8. The outer diameter of the assembling ring 6 is larger than the outer diameter of the process head 41 of the cylinder, and the outer diameter of the assembling ring 6 is 30-60 mm larger than the outer diameter of the process head 41 of the cylinder, which is convenient for the unloading fork 7 to push. The thickness of the assembling ring 6 meets the requirement of not deforming in use, and the thickness of the embodiment is designed to be 30 mm.

[0046] The assembling method of the multi-rotation spinning cylinder comprises the following steps:

[0047] Step 1: manually sleeve the process head 41 end of the cylinder 4 after heat treatment after one rotation on the spinning core die 3, adjust the posture of the cylinder 4, so that the inner diameter of the process head 41 end of the cylinder is fitted with the outer diameter of the spinning core die 3;

[0048] Step 2: install the assembling ring 6: sleeve the assembling ring 6 on the outer diameter of the cylinder 4, adjust the position of the assembling ring 6, so that the end face of the assembling ring 6 facing the process head 41 is in contact with the process head 41 end face at the spinning wheel stop position after one rotation;

[0049] Step 3: adjust the position of the unloading fork 7: control the spinning equipment, adjust the axial position of the unloading fork 7 on the spinning wheel seat, so that the unloading fork 7 is close to the end face of the assembling ring 6 away from the process head 41, and the unloading fork 7 is extended;

[0050] Step 4: control the spinning equipment, move the spinning wheel seat along the installation direction of the cylinder 4, push the assembling ring 6 through the unloading fork 7 to bring the cylinder 4 to the end of the machine tool spindle 1 of the spinning core die 3, so that the outer end face of the process head 41 is in contact with the unloading ring 2 sleeved on the end of the spinning core die 3, and the assembling of the cylinder 4 is completed.

[0051] The unloading fork 7 is inherent equipment of the spinning equipment, and the unloading fork 7 is installed on the spinning wheel seat. In the application, two unloading forks 7 with an included angle of 120° are used, and in the use process, the two unloading forks 7 are symmetrically arranged on both sides of the axis of the assembling ring 6, so that the force is uniform during the pushing of the cylinder 4.

[0052] The method for carrying out the multi-rotation spinning processing of the cylinder by using the assembling method provided by the application comprises the following steps:

[0053] Step 1: Select tubular material or forged cylindrical blank according to the size requirements of the design drawing;

[0054] Step 2: Perform a softening heat treatment on the billet;

[0055] Step 3: CNC turn the blank to the initial size for spinning to obtain the spun blank;

[0056] Step 4: Fit the spinning blank onto the end of the machine tool spindle 1 of the spinning mandrel 3, so that the end of the spinning blank abuts against the unloading ring 2;

[0057] Step 5: Perform 1 to 3 passes of staggered high-intensity spinning on the spun billet to obtain the spun cylinder 4 after one spinning stroke;

[0058] Step 6: Perform heat treatment annealing on the spun cylinder 4;

[0059] Step 7: Use the assembly ring 6 and the unloading fork 7 to assemble the heat-treated spinning cylinder 4. Select the size of the assembly ring 6 according to the specifications of the spinning cylinder 4. Place the assembly ring 6 on the process material head 41 end of the first stroke of the spinning cylinder 4. Adjust the axial position of the unloading fork 7 to be near the end face of the assembly ring 6 facing away from the process material head 41. Extend the unloading fork 7 and move the spinning wheel seat along the installation direction of the cylinder 4 to bring the spinning cylinder 4 into the machine tool spindle 1 end of the spinning mandrel 3 until the outer end face of the process material head 41 abuts against the unloading ring 2 to complete the assembly.

[0060] Step 8: Perform 1 to 3 more passes of staggered high-intensity spinning on the assembled spinning cylinder 4;

[0061] Step 9: Repeat steps 6-8 until cylinder 4 reaches the final spinning required size.

[0062] The following are three specific examples of cylindrical spinning using the assembly method of the present invention:

[0063] Example 1:

[0064] For a spun cylinder made of D406A ultra-high strength steel with dimensions of outer diameter × wall thickness × length = φ400 × 2.5 × 800, its processing into a cylinder includes the following steps:

[0065] 1) Selecting D406A seamless steel tube with outer diameter x wall thickness = φ426 x 22 as the cylinder blank; 2) Spheroidizing annealing of the cylinder blank: from 860℃±10℃ to 720℃±10℃, furnace cooling to 600℃ or below and air cooling; 3) Numerical control turning of the cylinder blank: obtaining the spinning blank, the specific inner diameter is φ395.2mm, the wall thickness is 13mm, and the wall thickness difference of the spinning blank is ensured to be not more than 0.07mm; 4) Manually assembling the spinning blank to the spinning core die 3; 5) Using the three-roller numerical control powerful spinning machine, spinning the spinning blank to 7.5mm±0.10mm thick; 6) Heat treatment of the spinning cylinder 4 after one spinning process: 700℃±10℃ for 600min; 7) Assembling the spinning cylinder process head end 41 to the spinning core die 3, assembling ring 6 on the first spinning process process head 41 of the spinning cylinder 4, the size of the assembling ring 6 is: inner diameter φ411.8mm, outer diameter φ488mm, thickness 30mm, both ends of the inner hole are rounded R6, using the unloading fork 7 to drive the assembling ring 6, and assembling the spinning cylinder 4 in place; 8) Using the three-roller numerical control powerful spinning machine, spinning the spinning cylinder φ400x2.5x800.

[0066] Example 2.

[0067] For the spinning cylinder with D406A ultra-high strength steel as the material and the size of outer diameter x wall thickness x length = φ500x3x1000, the processing of the cylinder includes the following steps:

[0068] 1) Selecting D406A seamless steel tube with outer diameter x wall thickness = φ530x25 as the cylinder blank; 2) Spheroidizing annealing of the cylinder blank: from 860℃±10℃ to 720℃±10℃, furnace cooling to 600℃ or below and air cooling; 3) Numerical control turning of the cylinder blank: obtaining the spinning blank, the specific inner diameter is φ494.2mm, the wall thickness is 13.6mm, and the wall thickness difference of the spinning blank is ensured to be not more than 0.08mm; 4) Manually assembling the spinning blank to the spinning core die 3; 5) Using the three-roller numerical control powerful spinning machine, spinning the spinning blank to 8mm±0.10mm thick; 6) Heat treatment of the spinning cylinder 4 after one spinning process: 700℃±10℃ for 600min; 7) Assembling the spinning cylinder process head end 41 to the spinning core die 3, assembling ring 6 on the first spinning process process head 41 of the spinning cylinder 4, the size of the assembling ring 6 is: inner diameter φ512.2mm, outer diameter φ585mm, both ends of the inner hole are rounded R8, thickness 30mm, using the unloading fork 7 to drive the assembling ring 6, and assembling the spinning cylinder 4 in place; 8) Using the three-roller numerical control powerful spinning machine, spinning the spinning cylinder φ500x3x1000.

[0069] Example 3:

[0070] For the material D406A super high strength steel, size is outer diameter x wall thickness x length = φ600x3.5x1000 spinning cylinder, its processing into cylinder includes the following steps:

[0071] 1) select the outer diameter x wall thickness = φ630x24 D406A seamless steel tube as cylinder blank; 2) cylinder blank spheroidizing annealing: from 860℃±10℃ to 720℃±10℃, furnace cooling to 600℃ or less out of the furnace air cooling; 3) the cylinder blank is processed by numerical control turning: spinning blank is obtained, the specific inner diameter is φ593.2mm, the wall thickness is 15mm, and the wall thickness difference of the spinning blank is ensured to be not more than 0.09mm; 4) manually assemble the spinning blank to the spinning core die 3; 5) use three spinning wheel numerical control power spinning machine, spinning the spinning blank to 8.5mm±0.10mm thick; 6) heat treatment is carried out on the spinning cylinder 4 after one spinning process: 700℃±10℃ for 600min; 7) the spinning cylinder process head end 41 is assembled to the spinning core die 3, the assembly ring 6 is sleeved on the first spinning process process head 41 of the spinning cylinder 4, the size of the assembly ring 6 is: inner diameter φ612.5mm, outer diameter φ688mm, both ends of the inner hole are rounded R8, the thickness is 30mm, the assembly ring 6 is driven by the unloading fork 7, and the spinning cylinder 4 is assembled in place; 8) use three spinning wheel numerical control power spinning machine, spinning φ600x3.5x1000 spinning cylinder.

[0072] Although the embodiments of the present application have been shown and described above, it is to be understood that the above-described embodiments are exemplary, and are not to be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments without departing from the principles and purposes of the present application within the scope of the present application.

Claims

1. A method for assembling a multi-stroke spinning cylinder, characterized in that: The assembly method uses an assembly ring (6), which is annular with coaxial inner and outer diameters and parallel end faces perpendicular to the axis. The inner diameter of the assembly ring (6) is 0.6 to 1.5 mm larger than the outer diameter of the cylinder (4) after the first rotation, and the two ends of the inner diameter are rounded. The assembly steps of the multi-stroke spinning cylinder are as follows: Step 1: Fit the process material head (41) end of the heat-treated cylinder (4) after one spin cycle onto the spinning mandrel (3), and adjust the posture of the cylinder (4) so ​​that the inner diameter of the process material head (41) end of the cylinder fits with the outer diameter of the spinning mandrel (3). Step 2: Install assembly ring (6): Fit assembly ring (6) onto the outer diameter of cylinder (4), adjust the position of assembly ring (6) so that the end face of assembly ring (6) facing process head (41) contacts the end face of process head (41) at the stop position of one-stroke rotary wheel; Step 3: Adjust the position of the unloading fork (7): Operate the spinning equipment to adjust the axial position of the unloading fork (7) located on the spinning wheel seat, so that the unloading fork (7) is close to the end face of the assembly ring (6) facing away from the process material head (41) and extends out of the unloading fork (7). Step 4: Operate the spinning equipment, move the spinning wheel seat along the installation direction of the cylinder (4), and push the assembly ring (6) through the unloading fork (7) to bring the cylinder (4) into the end of the machine tool spindle (1) of the spinning core mold (3), so that the outer end face of the process material head (41) abuts against the unloading ring (2) fitted on the end of the spinning core mold (3), and complete the assembly of the cylinder (4).

2. The assembly method of a multi-stroke spinning cylinder according to claim 1, characterized in that: The inner diameter of the assembly ring (6) has rounded corners of R6 to R8 at both ends.

3. The assembly method of a multi-stroke spinning cylinder according to claim 1, characterized in that: The outer diameter of the assembly ring (6) is 30-60 mm larger than the outer diameter of the cylindrical process material head (41).

4. The assembly method of a multi-stroke spinning cylinder according to claim 1, characterized in that: The thickness of the assembly ring (6) meets the requirement of not deforming during use.

5. The assembly method of a multi-stroke spinning cylinder according to claim 4, characterized in that: The thickness of the assembly ring (6) is 30 mm.

6. The assembly method of a multi-stroke spinning cylinder according to claim 1, characterized in that: There are two unloading forks (7), and the included angle between the two unloading forks (7) is 120°. The two unloading forks (7) are symmetrically placed on both sides of the axis of the assembly ring (6).

7. The assembly method of a multi-stroke spinning cylinder according to claim 1, characterized in that: The assembly method is used for multi-stroke spinning assembly of cylindrical parts made of alloy structural steel, ultra-high strength steel or titanium alloy materials.

8. A method for processing a multi-stroke spinning cylinder using the assembly method described in any one of claims 1 to 6, characterized in that: The steps are as follows: Step 1: Select tubular material or forged cylindrical blank according to the size requirements of the design drawing; Step 2: Perform a softening heat treatment on the billet; Step 3: CNC machine the blank to the required dimensions for spinning, and obtain the spun blank; Step 4: Fit the spinning blank onto the end of the machine tool spindle (1) of the spinning mandrel (3); Step 5: Perform 1 to 3 passes of staggered high-intensity spinning on the spun billet to obtain a spun cylinder (4) after one spinning stroke. Step 6: Perform heat treatment annealing on the spun cylinder (4); Step 7: Use the assembly ring (6) and the unloading fork (7) to assemble the heat-treated spinning cylinder (4). Select the size of the assembly ring (6) according to the specifications of the spinning cylinder (4). Put the assembly ring (6) on the process material head (41) end of the first stroke of the spinning cylinder (4). Adjust the axial position of the unloading fork (7) to the vicinity of the end face of the assembly ring (6) facing away from the process material head (41). Extend the unloading fork (7) and move the spinning wheel seat along the installation direction of the cylinder (4) to bring the spinning cylinder (4) into the machine tool spindle (1) end of the spinning mandrel (3) until the outer end face of the process material head (41) abuts against the unloading ring (2) to complete the assembly. Step 8: Perform 1 to 3 passes of staggered high-intensity spinning on the assembled spinning cylinder (4); Step 9: Repeat steps 6-8 until the cylinder (4) reaches the final spinning requirement size.

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