Preparation method of porous segment roller

Abstract

The present application discloses a preparation method of a porous segment roller, which includes three steps: rough machining, hole opening, and fine machining. Through the rough machining, the initial roller obtained has a preset length and outer diameter. At the same time, the hole segment formed by the first channel, the second channel, and the third channel in the roller has good coaxiality, so that the axial direction and stability of the initial roller on the processing equipment are beneficial to ensuring the opening accuracy of the mounting hole and controlling the coaxiality of the mounting hole and the first channel. By machining the outer diameter and length of the roller in stages and multiple times, each calibration can control the error within a certain range, thereby avoiding uncorrectable deviations when the processing is in place at one time. At the same time, clamps are set at the ends of the roller multiple times. The setting of the clamps not only facilitates the function of the positioning tool, but also can refine the outer diameter of the roller and facilitate the subsequent unification of the outer diameter of the roller.

Description

Technical Field

[0001] The present application relates to the technical field of roller preparation methods, and in particular to a method for preparing a porous segment roller. Background Art

[0002] For rollers with few internal hole segments or simple internal hole segment structures, after the roller is prepared by one-piece molding, the required hole segments can be constructed in the roller through drilling machines, boring tools and other tools. The roller shaft and assembly parts are installed using the hole segments to form a roller.

[0003] However, for rollers with multiple internal hole sections and different diameters of each hole section, direct drilling is difficult to meet the needs of various internal hole diameters and it is also difficult to ensure the accuracy of the holes.

[0004] In the prior art, some approaches involve separating the roller into multiple sections, constructing the required hole segments in each section, and then combining and fixing the sections together to form the roller. However, this approach makes it difficult to ensure the coaxiality of the hole segments. Summary of the Invention

[0005] The purpose of this application is to overcome the deficiencies in the prior art and to provide a method for preparing a porous segment roller.

[0006] To achieve the above technical objectives, the present application provides a method for preparing a porous segment roller, comprising the following steps:

[0007] S1. Rough machining:

[0008] By friction welding, one end of the round tube is connected to the first plug and the other end is connected to the second plug to obtain an initial roller;

[0009] Make the outer diameters of the first plug and the second plug flush with the round tube;

[0010] The initial roller length is A1 and the diameter is B1;

[0011] In the initial roller, the end where the first plug is located is the first end, and the end where the second plug is located is the second end;

[0012] A first clamping position is machined at the first end, wherein the length of the first clamping position is A2 and the diameter is B2, where A2 is less than ½ A1 and B2 is less than B1;

[0013] The second end is aligned with the first clamping position until the initial roller diameter is B2;

[0014] Process the end face of the initial roller until the length of the initial roller is A3, A3<A1;

[0015] S2. Opening:

[0016] Rough boring the second end to form a first mounting hole;

[0017] The depth of the first mounting hole is C1, and the diameter is D1+n, where n is the margin;

[0018] Rough boring the second end to form a second mounting hole in the first mounting hole;

[0019] The diameter of the second mounting hole is D2+n, D2<D1;

[0020] Rough boring the first end to form a third mounting hole (11);

[0021] The depth of the third mounting hole is C2 and the diameter is D3+n;

[0022] Rough boring the first end to form a fourth mounting hole in the third mounting hole;

[0023] The total depth of the third mounting hole 11 and the fourth mounting hole is C3, and the diameter of the fourth mounting hole is D4+n;

[0024] Rough boring the first end to form a fifth mounting hole in the fourth mounting hole;

[0025] The diameter of the fifth mounting hole is D5+n, D5<D4<D3;

[0026] S3. Finishing:

[0027] A second clamping position is formed at the first end, and a third clamping position is formed at the second end;

[0028] The length of the second clamping position and the third clamping position is A4, and the diameter is B3, A4<½A3, B3<B2;

[0029] Precision boring the first end and the second end so that the diameter of the first mounting hole is D1, the diameter of the second mounting hole is D2, the diameter of the third mounting hole is D3, the diameter of the fourth mounting hole is D4, and the diameter of the fifth mounting hole is D5;

[0030] Process the first end and the second end until the initial roller diameter is B4, B4<B3;

[0031] The end face of the initial roller is processed until the length of the initial roller is A5, where A5 is less than A3.

[0032] Furthermore, in S1, during friction welding, the spindle spring clamp of the friction welding machine clamps the first plug and the hydraulic clamp clamps the round tube, or the spindle spring clamp of the friction welding machine clamps the second plug and the hydraulic clamp clamps the round tube;

[0033] Among them: when the first plug or the second plug is clamped by the spindle spring clamp, the spindle spring clamp has a runout of less than 0.1; and / or, when the round tube is clamped by the hydraulic clamp, the guide rail position of the hydraulic clamp is adjusted so that the runout between the hydraulic clamp and the spindle spring clamp is less than 0.5; and / or, when the round tube is clamped by the hydraulic clamp, the clamping position of the hydraulic clamp is within 150 degrees from the end face of the round tube; and / or, after friction welding, the coaxiality of the first channel, the second channel and the third channel is not greater than 0.8.

[0034] Furthermore, in S1: after friction welding, when processing the first plug and the second plug, the second channel opening of the first plug is first chamfered 2*60°, and the third channel opening of the second plug is chamfered 2*60°; the positioning tool includes a top; the top is pushed into the second channel or the third channel through the chamfer, and the positioning tool can stabilize the initial roller for lathe processing.

[0035] Furthermore, the positioning tool includes a center, a soft jaw and a center frame; in S1: after obtaining the initial roller, the soft jaw clamps the second end and the center jaw pushes into the second channel, so that the lathe processes the first end and constructs the first clamping position; and / or, after obtaining the first clamping position, the soft jaw clamps the first end and the center jaw pushes into the third channel, so that the lathe processes from the second end until the outer diameter of the initial roller is unified; and / or, when processing the end face of the first end, the soft jaw clamps the second end and the center frame supports the first end, so as to expose the end face of the first end and ensure the stability of the first end; and / or, when processing the end face of the second end, the soft jaw clamps the first end and the center frame supports the second end, so as to expose the end face of the second end and ensure the stability of the second end.

[0036] Further, the positioning tool includes soft jaws and a center stand; in S2: when rough boring the second end, the soft jaws clamp the first end, and the center stand supports the second end so as to expose the third channel at the second end, and the rough boring tool constructs the first mounting hole and the second mounting hole through the third channel; and / or, when rough boring the first end, the soft jaws clamp the second end, and the center stand supports the first end so as to expose the second channel at the first end, and the rough boring tool constructs the third mounting hole, the fourth mounting hole and the fifth mounting hole through the second channel; and / or, when rough boring, the diameters of the first mounting hole, the second mounting hole, the third mounting hole, the fourth mounting hole and the fifth mounting hole are left with a margin of 0.5; and / or, a reference angle of 2*60° is set between the first mounting hole and the second mounting hole; and / or, a reference angle of 2*60° is set between the third mounting hole and the fourth mounting hole.

[0037] Furthermore, the positioning tool includes a center, soft jaws, a center stand and a positioning mandrel; in S3: when processing the second clamping position and the third clamping position, the center is pushed into the second channel at the first end and the third channel at the second end, and the runout of the initial roller is not greater than 0.01; and / or, when precision boring the first end, the soft jaws clamp the second end and the center stand supports the first end, so that the precision boring tool acts on the third mounting hole, the fourth mounting hole and the fifth mounting hole; and / or, when precision boring the second end, the soft jaws clamp the first end and the center stand supports the second end, so that the precision boring tool acts on the first mounting hole and the second mounting hole; and / or, when the soft jaws clamp the initial roller, the runout of the soft jaws is not greater than 0.01; and / or, when processing the end face of the first end or the second end, the center is pushed into the third channel and the positioning mandrel rests against the step in the second channel, thereby ensuring the stability and axial accuracy of the initial roller.

[0038] Further, in S3: after completing the precision boring of the second end, drilling and tapping are performed in the first mounting hole to construct a threaded hole, and the threaded hole is inspected using a go / no-go gauge to ensure that the verticality of the threaded hole is not greater than 0.5 / 100.

[0039] Furthermore, in S3: after completing the precision boring of the first end and the second end and completing the construction of the threaded hole, remove the burrs in the first mounting hole, the second mounting hole, the third mounting hole, the fourth mounting hole, the fifth mounting hole and / or the threaded hole, and clean the waste chips in the initial roller.

[0040] Furthermore, the preparation method of the porous segment roller provided in the present application also includes S4. Post-processing: coarse grinding of the initial roller until the surface roughness of the initial roller is Ra0.35, Rz3; fine grinding of the initial roller until the surface roughness of the initial roller is Ra0.3, Rz2.5; polishing of the initial roller until the surface roughness of the initial roller is Ra0.25, Rz2.

[0041] Further, in S4: the outer circle of the initial roller is rough-ground by the grinding machine water tank, and the grinding machine water tank uses a green silicon carbide 46-mesh grinding wheel. During the rough grinding process, the grinding machine water tank feeds back and forth multiple times for grinding, and reduces the feed and grinding amount in the last two reciprocating movements; and / or, the outer circle of the initial roller is fine-ground by the grinding machine water tank, and the grinding machine water tank uses a green silicon carbide 120-mesh grinding wheel. During the fine grinding process, the grinding machine water tank feeds back and forth multiple times for grinding, and finally does not feed the grinding amount and the tool moves back and forth two times in vain; and / or, after completing the fine grinding of the initial roller, check the appearance of the initial roller to ensure that there are no vertical lines; and / or, use a 600-mesh polishing disc to polish the outer circle of the initial roller; and / or, after completing the polishing of the initial roller, perform an appearance inspection on the initial roller at a light intensity of 1000~1500lx and a distance of 0.5m.

[0042] The present application provides a preparation method of a porous roller, including three steps of rough machining, hole opening and fine machining; through rough machining, the initial roller obtained has a preset length and outer diameter, and at the same time, the hole segment formed by the first channel, the second channel and the third channel in the roller has good coaxiality. On this basis, when the initial roller is further processed, the positioning tool can accurately act on the initial roller, so that the initial roller has a stable, accurate and high-precision position when it is on a lathe or other processing equipment, which is conducive to the processing equipment to act on the initial roller accurately and efficiently; ensuring the axial direction and stability of the initial roller on the processing equipment is conducive to ensuring the first mounting hole, the second mounting hole, the third mounting hole, the fourth mounting hole and the third mounting hole are aligned. The opening accuracy of the five mounting holes is conducive to controlling the coaxiality of each mounting hole and the first channel; by processing the outer diameter and length of the roller in stages and multiple times, each calibration can control the error within a certain range, thereby avoiding uncorrectable deviations when the processing is in place at one time; at the same time, clamps are set at the ends of the roller multiple times. The setting of the clamps is convenient for the positioning tool, and can also refine the outer diameter of the roller and facilitate the subsequent unification of the outer diameter of the roller; the use of the positioning tool can not only fix the roller, but also effectively adjust and ensure the position and orientation of the roller; this is beneficial for the lathe to process the outer diameter and length of the roller, and for the boring tool to construct the mounting hole in the roller, and also for ensuring the coaxiality of each hole segment in the initial roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figures 1 to 14 This is a schematic diagram of the structure of a roller provided in this application at various stages in the preparation process. DETAILED DESCRIPTION

[0044] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0045] The present application provides a method for preparing a porous segment roller, comprising the following steps:

[0046] SO. Prepare the ingredients:

[0047] The circular tube 30 has a first passage formed therein, and the first passage penetrates the circular tube 30 in the axial direction;

[0048] A first plug 10; a second passage is provided in the first plug 10, and the second passage axially penetrates the first plug 10;

[0049] The second plug 20 is provided with a third passage, and the third passage axially penetrates the second plug 20.

[0050] The outer diameters of the first plug 10 and the second plug 20 are larger than the outer diameter of the circular tube 30. This not only facilitates the coaxiality correction of the first, second, and third channels, but also facilitates the control of the relative position of the plug (first plug 10 or second plug 20) and the circular tube 30 during subsequent friction welding, facilitating a better connection between the heat-melted portions of the plug and the circular tube 30 during frictional heat generation.

[0051] It should be noted that the circular tube 30, the first plug 10, and the second plug 20 are the three components of the roller. When the three are assembled and fixed together to form the roller, the circular tube 30 is located between the first plug 10 and the second plug 20, so that the first channel, the second channel, and the third channel are interconnected, allowing the roller shaft to pass through the roller.

[0052] For the roller, the circular tube 30 is the primary working area; therefore, the first channel in the circular tube 30 also determines the roller's wall thickness. The first and second plugs 10 and 20 are primarily used to install assembly parts and facilitate connection between the roller and the roller shaft. They are also used to connect to external equipment, facilitating installation and operation of the roller. Therefore, further processing is required for the second and third channels to create holes that facilitate connection to the roller shaft, assembly parts, and external equipment.

[0053] Optionally, before welding the round tube 30 and the plug, the runout of the straightened round tube 30 is less than 0.5 to ensure the structural accuracy of the round tube 30. After welding, the first channel is no longer processed to avoid increasing the difficulty of operation.

[0054] S1. Rough machining:

[0055] By friction welding, one end of the round tube 30 is connected to the first plug 10 and the other end is connected to the second plug 20 to obtain an initial roller;

[0056] The first plug 10 and the second plug 20 are processed by a lathe so that the outer diameters of the first plug 10 and the second plug 20 are flush with the round tube 30;

[0057] The initial roller length is A1 and the diameter is B1;

[0058] In the initial roller, the end where the first plug 10 is located is the first end, and the end where the second plug 20 is located is the second end;

[0059] Processing the first end using a lathe to form a first clamping position, wherein the positioning tool can fix the first end through the first clamping position;

[0060] The length of the first clamping position is A2, and the diameter is B2, A2<½A1, B2<B1;

[0061] Using a lathe to process from the second end toward the first clamping position, so that the second end is flush with the first clamping position, until the initial roller diameter is B2;

[0062] The end face of the initial roller is machined using a lathe until the length of the initial roller is A3, where A3 is less than A1.

[0063] In a specific embodiment, referring to Figure 1 The initial outer diameter of the round tube 30 is 102; the initial outer diameters of the first plug 10 and the second plug 20 are 103; the diameter of the second channel is 36; and the diameter of the third channel is 20 (in the illustrated embodiment of the present application, all dimensions are in cm).

[0064] Continue to refer to Figure 1 In order to standardize the roller processing plan and ensure the uniformity and accuracy of the processing, the length of the initial roller is first calibrated (such as using a lathe to turn the end face of the initial roller to adjust the length of the initial roller) so that the length of the initial roller is the preset value A1=1066 (upper deviation +5, lower deviation 0).

[0065] Combined with reference Figure 1 and Figure 2 Since the initial outer diameters of the first plug 10 and the second plug 20 are larger than the initial outer diameter of the round tube 30, the initial roller obtained after welding is thick at both ends and thin in the middle. The non-uniform outer diameter of the initial roller is not only not conducive to lathe processing, but also hinders the use of positioning tools (such as centers, center frames, soft jaws, positioning mandrels, etc.). If the positioning tools cannot stabilize the initial roller, the initial roller is very easy to shift or move, which ultimately affects the processing effect. To this end, the initial roller after welding is subjected to outer circle processing, mainly turning the welding bar area, so that the initial roller after welding has a uniform or nearly uniform outer diameter B1=102 (upper deviation +0.1, lower deviation 0); thereby, the first diameter calibration of the initial roller is achieved.

[0066] During the welding process, the coaxiality of the first channel, the second channel, and the third channel is calibrated to facilitate the subsequent opening of mounting holes in the second channel and the third channel.

[0067] Reference Figure 3 , perform the second diameter calibration, and turn the first clamping position before the first end. The length of the first clamping position is A2=120 (upper deviation +5, lower deviation -5), and the diameter is B2=98.7 (upper deviation +0.1, lower deviation 0).

[0068] Because the first clamping position has a relatively short length, A2, the lathe can easily produce the precise, pre-set diameter. Once the first clamping position is complete, a steady rest is used as a positioning tool to secure it. This steady rest effectively secures the first end of the initial roller, facilitating alignment of the initial roller on a lathe or other processing equipment while ensuring stability during machining.

[0069] Combined with reference Figure 4 After confirming the preset diameter B2 through the first clamping position, use a lathe to process from the second end of the initial roller to the first clamping position; the tool turns from the second end to the first end until the second end is flush with the first clamping position; thus, the second diameter calibration of the initial roller is completed.

[0070] After the second diameter calibration, the initial rollers have a uniform or nearly uniform outer diameter of B2 = 98.7 (upper deviation + 0.1, lower deviation 0). The uniform outer diameter of the initial rollers allows for better positioning when the positioning tool is applied to the initial rollers.

[0071] Continue to refer to Figure 4 , perform the first length calibration, turn the end face of the first end, and / or, turn the end face of the second end, until the initial roller length is A3=1060.5 (upper deviation +0.2, lower deviation 0).

[0072] In summary, through the rough processing steps, the initial roller obtained has a preset length (A3) and outer diameter (B2). At the same time, the hole section in the roller formed by the first channel, the second channel and the third channel has good coaxiality. On this basis, when the initial roller is further processed, the positioning tool can accurately act on the initial roller, so that the initial roller has a stable, accurate and high-precision position state when it is on a lathe or other processing equipment, which is conducive to the processing equipment to act on the initial roller accurately and efficiently.

[0073] S2. Opening:

[0074] Rough boring the second end to form a first mounting hole 21;

[0075] The first mounting hole 21 has a depth of C1 and a diameter of D1+n, where n is the margin;

[0076] Rough boring the second end to form a second mounting hole 22 in the first mounting hole 21;

[0077] The diameter of the second mounting hole 22 is D2+n, D2<D1;

[0078] Rough boring the first end to form a third mounting hole 11;

[0079] The third mounting hole 11 has a depth of C2 and a diameter of D3+n;

[0080] Rough boring the first end to form a fourth mounting hole 12 in the third mounting hole 11;

[0081] The total depth of the third mounting hole 11 and the fourth mounting hole 12 is C3, and the diameter of the fourth mounting hole 12 is D4+n;

[0082] Rough boring the first end to form a fifth mounting hole 13 in the fourth mounting hole 12;

[0083] The diameter of the fifth mounting hole 13 is D5+n, D5<D4<D3;

[0084] Reference Figure 5 After machining the second end, the first mounting hole 21 and the second mounting hole 22 are bored in the third channel. Since the first mounting hole 21 is located on the outside, it is rough-bored before the exit of the third channel. The depth of the first mounting hole 21 is C1 = 15.4 (upper deviation 0, lower deviation -0.1), and the diameter D1 + n = 72 + 5 (upper deviation -0.5, lower deviation -0.6).

[0085] After rough boring the first mounting hole 21, the bottom end of the first mounting hole 21 connects to the first channel via the third channel. A second mounting hole 22 is then rough bored at the exit of the third channel, directly connecting the first mounting hole 21 and the first channel. The diameter of the second mounting hole 22 is D2 + n = 25 + 5 (upper deviation -0.5, lower deviation -0.6).

[0086] Reference Figure 6 After machining the first end, the third, fourth, and fifth mounting holes 11, 12, and 13 are bored in the second channel. Because third mounting hole 11 is located externally, it is rough-bored before the exit of the second channel. Third mounting hole 11 has a depth of C2 = 14 (upper tolerance +0.05, lower tolerance -0.05), and a diameter of D3 + n = 72 + 5 (upper tolerance -0.5, lower tolerance -0.6).

[0087] After rough boring the third mounting hole 11, the bottom end of the third mounting hole 11 connects to the first channel via the second channel. The fourth mounting hole 12 is then rough bored at the outlet of the second channel. The combined depth of the third and fourth mounting holes 11, 12 is C3 = 45.6 (upper tolerance +0.05, lower tolerance -0.05).

[0088] After rough boring the fourth mounting hole 12, its bottom end connects to the first channel via the second channel. A fifth mounting hole 13 is then rough bored at the outlet of the second channel, connecting the fourth mounting hole 12 and the first channel. The diameter of the fifth mounting hole 13 is D5 + n = 42 + 5 (upper tolerance -0.5, lower tolerance -0.6).

[0089] It should be noted that when the depth of third mounting hole 11 meets the preset value, ensuring that the total depth of third mounting hole 11 and fourth mounting hole 12 meets the preset value can also ensure that the depth of fourth mounting hole 12 meets the preset value. Compared to measuring the depth of fourth mounting hole 12, measuring the total depth of third mounting hole 11 and fourth mounting hole 12 is more convenient.

[0090] It should also be added that, in S2, the second end may be rough bored first, or the first end may be rough bored first. If necessary, the first end and the second end may be rough bored simultaneously.

[0091] It should also be noted that the rough-bored mounting holes should at least have a diameter margin (in the above embodiment, margin n = 5). The purpose of rough boring is to first determine the relative positions of the mounting holes and perform the initial hole position and diameter calibration, and secondly, to reduce the workload during fine boring and facilitate fine boring.

[0092] After rough machining to obtain an initial roller with a predetermined length (A3) and outer diameter (B2), the positioning tool securely and accurately secures the initial roller to the machining equipment, facilitating the boring cutter's action on the second and third channels. Ensuring the initial roller's axial orientation and stability on the machining equipment not only helps ensure the precision of the openings of each mounting hole (first mounting hole 21, second mounting hole 22, third mounting hole 11, fourth mounting hole 12, or fifth mounting hole 13), but also helps control the coaxiality of each mounting hole with the first channel.

[0093] S3. Finishing:

[0094] Processing the first end using a lathe to construct a second clamping position, whereby a positioning tool can fix the first end through the second clamping position;

[0095] The second end is processed by a lathe to form a third clamping position, and the positioning tool can fix the second end through the third clamping position;

[0096] The length of the second clamping position and the third clamping position is A4, and the diameter is B3, A4<½A3, B3<B2;

[0097] Fine boring the first and second ends, removing the allowance n, so that the diameter of the first mounting hole 21 is D1, the diameter of the second mounting hole 22 is D2, the diameter of the third mounting hole 11 is D3, the diameter of the fourth mounting hole 12 is D4, and the diameter of the fifth mounting hole 13 is D5;

[0098] The first end and the second end are processed by a lathe until the initial roller diameter is B4, where B4 is less than B3;

[0099] The end face of the initial roller is machined using a lathe until the length of the initial roller is A5, where A5 is less than A3.

[0100] Reference Figure 7 Before fine boring, a third diameter calibration is performed, first machining the first and second clamping positions. The length of the second and third clamping positions, A4, is 120 mm (upper deviation +5 mm, lower deviation -5 mm), and the diameter, B3, is 98.5 mm (upper deviation +0.1 mm, lower deviation 0 mm). The short lengths of the second and third clamping positions ensure high lathe operational stability and ensure excellent dimensional accuracy of the clamping positions.

[0101] After the second and third clamping positions are machined, the positioning tool acts on the clamping positions, which can better ensure the initial position and axial direction of the roller on the processing equipment, which is beneficial to the accuracy of processing.

[0102] Reference Figure 8 After using the positioning tool to fix the second and third clamping positions and calibrate the initial position and axial direction of the roller, the mounting hole at the first end is precision bored so that the diameter of the third mounting hole 11 is D3 = 72 (upper deviation +0.3, lower deviation -0.3), the diameter of the fourth mounting hole 12 is D4 = 47M6 (upper deviation -0.04, lower deviation -0.02), and the diameter of the fifth mounting hole 13 is D5 = 42 (upper deviation +0.3, lower deviation -0.3).

[0103] Reference Figure 9 After using the positioning tool to fix the second and third clamping positions and calibrate the initial roller position and swing direction, the mounting hole at the second end is precision bored so that the diameter of the first mounting hole 21 is D1=72 (upper deviation +0.3, lower deviation -0.3), and the diameter of the second mounting hole 22 is D2=25H6 (upper deviation +0.013, lower deviation 0).

[0104] By fastening the initial roller with the positioning tool, the fine boring tool can act stably and accurately on the mounting holes, thereby accurately boring out the required diameter and ensuring the coaxiality of the five mounting holes.

[0105] Reference Figure 10 and Figure 11 After finishing the fine boring, the fourth diameter calibration is carried out. The initial roller is machined axially from the first end and / or the second end using a lathe, and the outer diameter of the initial roller is adjusted until the diameter of the initial roller is B4=98 (upper deviation +0.1, lower deviation +0.07).

[0106] Continue to refer to Figure 11 , perform the second length calibration, turn the end face of the first end, or turn the end face of the second end, until the initial roller length is A5=1060 (upper deviation +0.2, lower deviation 0).

[0107] By processing the outer diameter and length of the roller in stages and multiple times, each calibration can control the error within a certain range, thereby avoiding uncorrectable deviations when the processing is in place at one time; at the same time, clamps are set at the ends of the roller multiple times. The setting of the clamps not only facilitates the role of the positioning tool, but also can refine the outer diameter of the roller and facilitate the subsequent unification of the outer diameter of the roller; the use of the positioning tool can not only fix the roller, but also effectively adjust and ensure the position and orientation of the roller; this is beneficial for the lathe to process the outer diameter and length of the roller, but also for the boring tool to construct the mounting hole in the roller, and also for ensuring the coaxiality of each hole segment in the initial roller.

[0108] In summary, the preparation method provided in this application can be used to prepare rollers with complex internal pore segments and high precision requirements.

[0109] Furthermore, in S1 , during friction welding, the spindle spring clamp of the friction welding machine clamps the first plug 10 and the hydraulic clamp clamps the round tube 30 , or the spindle spring clamp of the friction welding machine clamps the second plug 20 and the hydraulic clamp clamps the round tube 30 .

[0110] During the welding process, the hydraulic clamp can fix the round tube 30 so that the end of the round tube 30 is facing the plug to be welded; and the spindle spring clamp can drive the plug against the round tube 30 and rub the round tube 30 to make a rotational motion, thereby realizing hot melt welding of the plug and the round tube 30.

[0111] To ensure the coaxiality of the second channel, the third channel and the first channel, optionally, when the first plug 10 or the second plug 20 is clamped by the spindle spring clamp, the spindle spring clamp jump is less than 0.1.

[0112] Optionally, when the round tube 30 is clamped by the hydraulic clamp, the guide rail position of the hydraulic clamp is adjusted so that the runout between the hydraulic clamp and the spindle spring clamp is less than 0.5.

[0113] Optionally, when the round tube 30 is clamped by the hydraulic clamp, the clamping position of the hydraulic clamp is within 150 degrees from the end surface of the round tube 30 .

[0114] Specific reference Figure 1 In the embodiment shown, the circular tube 30 is positioned horizontally, with the right end of the circular tube 30 connected to the first plug 10 and the left end to the second plug 20. When the friction welding machine's clamp grips the circular tube 30, it acts within 150° of the left end or 150° of the right end of the circular tube 30. This close proximity of the clamp to the welded portion of the circular tube 30 stabilizes the circular tube 30 and prevents movement during welding, thereby ensuring a good weld.

[0115] Optionally, after friction welding, the coaxiality of the first channel, the second channel, and the third channel is not greater than 0.8. Ensuring the coaxiality of the first channel, the second channel, and the third channel facilitates subsequent accurate boring of mounting holes in the second channel and the third channel.

[0116] Furthermore, in S1, after friction welding, when the first plug 10 and the second plug 20 are processed by a lathe, the second channel opening of the first plug 10 is chamfered 2*60°, and the third channel opening of the second plug 20 is chamfered 2*60°; the positioning tool includes a top; the top is pushed into the second channel or the third channel through the two chamfers, and the positioning tool can stabilize the initial roller for lathe processing.

[0117] For details, please refer to Figure 2 Before chamfering the opening of the second channel, use a center stand to support the first end of the initial roller and use soft jaws to clamp the second end of the initial roller; the soft jaws can clamp the second end; with the second end clamped by the soft jaws as a reference, adjust the center stand to easily adjust the position and height of the first end to ensure the axial direction of the initial roller (such as: making the axial direction of the initial roller extend horizontally, or making the axial direction of the initial roller collinear with the processing direction of the lathe); after tightening the center stand and the first end, the axis of the first end supported by the center stand is stable, so that the lathe can process a chamfer with a depth of 2 and an angle of 60°.

[0118] Similarly, before chamfering the opening of the third channel, use the center stand to support the second end of the initial roller and the soft jaws to clamp the first end of the initial roller, so that the lathe can process the second chamfer with a depth of 2 and an angle of 60°.

[0119] Combined with reference Figure 3 , allowing the soft jaws to grip the second end and the centerpiece to be inserted into the second channel via the chamfer, facilitating lathe machining of the first end and establishing the first clamping position. The chamfer facilitates the insertion of the centerpiece. Once inserted into the second channel, it can calibrate the position and axial direction of the second channel to a certain extent and prevent the second end from moving, facilitating the lathe's accurate application of the first end and the creation of the first clamping position. If necessary, the centerpiece, tightly fitted with the second channel, can also rotate, driving the initial roller to follow.

[0120] Continue to refer to Figure 3 After achieving the first clamping position, maintain the position of the soft jaws and the center, and then support the first clamping position with the center stand to further calibrate the position and axial direction of the first end and stabilize the first end. At this point, the lathe can turn the end face of the second end; alternatively, remove the center inserted in the second channel and the lathe can turn the end face of the first end.

[0121] Optionally, when processing the end surface of the first end, the soft claws clamp the second end and the center frame supports the first end, so as to expose the end surface of the first end and ensure the stability of the first end.

[0122] Reference Figure 4 After achieving the first clamping position, the soft jaws grip the first end and the tip is inserted into the third channel through chamfering. This allows the lathe to turn the outer diameter of the initial roller from the second end toward the first clamping position until the second end is flush with the first end. After the initial roller's outer diameter is uniform, confirm that the runout of the center of the initial roller, including the first channel, is less than 0.3.

[0123] Continue to refer to Figure 4 After the initial roller outer diameter is uniform, the soft jaws and the centering tips are maintained in position, allowing the centering frame to support the second end. This further calibrates the second end's position and axial direction, and stabilizes the second end. At this point, the lathe can turn the end face of the first end; alternatively, the centering tips inserted in the third channel can be removed and the lathe can turn the end face of the second end.

[0124] Optionally, when processing the end surface of the second end, the soft claws clamp the first end and the center frame supports the second end, so as to expose the end surface of the second end and ensure the stability of the second end.

[0125] Generally, after completing the second diameter calibration to ensure that the initial rollers have a uniform or nearly uniform outer diameter B2, the end faces of the first and / or second ends are machined to achieve the first length calibration. This prevents the positioning tool from having difficulty securing the initial rollers when the outer diameters are inconsistent, and also prevents displacement or movement of the initial rollers during the first length calibration process, which improves the flatness of the end faces and their perpendicularity to the axial direction.

[0126] Optionally, after obtaining the initial roller, measure its length with a tape measure to ensure that A1 = 1066 (upper deviation +5, lower deviation 0). If the measured value is greater than A1, the initial roller length can be reduced by lathing the end face. If the measured value is less than A1, at least one of the dimensions of the first plug 10, the second plug 20, and the round tube 30 is incorrect, requiring an additional determination stage to determine whether the initial roller can continue to be processed.

[0127] Optionally, after obtaining the initial roller, the concentricity of the plug and the round tube 30 is measured by a dial indicator. If the concentricity of the three channels does not meet the preset value, it is necessary to add a determination stage to confirm whether the initial roller can be corrected.

[0128] Optionally, after obtaining the first clamping position, measure the length and diameter of the first clamping position with a caliper to confirm whether the length of the first clamping position meets A2=120 (upper deviation +5, lower deviation -5), and whether the diameter meets B2=98.7 (upper deviation +0.1, lower deviation 0).

[0129] Optionally, after the outer diameters of the initial rollers are unified, the initial rollers are measured with a caliper to confirm whether the length of the initial rollers meets A3=1060.5 (upper deviation +0.2, lower deviation 0), and whether the diameter meets B2=98.7 (upper deviation +0.1, lower deviation 0).

[0130] Optionally, after the outer diameters of the initial rollers are unified, a length margin of 0.5 is left when the length of the initial rollers is calibrated for the first time.

[0131] Optionally, when the initial roller is calibrated for the first time in length, the end of the initial roller that is not ground is clamped by a three-jaw soft jaw, so that one of the three-jaw soft jaws rests against the end face of the end to play a positioning role.

[0132] Further, in S2, refer to Figure 5 When rough boring the second end, the soft jaws clamp the first end, and the center stand supports the second end, so as to expose the third channel at the second end. The rough boring tool constructs the first mounting hole 21 and the second mounting hole 22 through the third channel. The soft jaws cooperate with the center stand to support the initial roller at both ends of the axial direction, which is beneficial to the stability and axial accuracy of the roller. Adjusting the support position of the center stand can calibrate the axial direction of the initial roller (for example, placing the initial roller horizontally, or setting the initial roller parallel to the direction of action of the boring tool); the center stand can also effectively stabilize the second end in a position that is convenient for the rough boring tool to work, preventing the second end from moving during the rough boring process.

[0133] Optionally, the soft jaw adopts a three-jaw soft jaw, so that one of the three-jaw soft jaws abuts against the end face of the first end. The soft jaw can not only well accommodate and clamp the first end, but also position the first end, thereby preventing the initial roller from moving axially during the rough boring process.

[0134] Continue to refer to Figure 5 During rough boring, a 0.5 diameter margin is left for the first mounting hole 21 and the second mounting hole 22. During fine boring, the margin is removed through further processing.

[0135] Continue to refer to Figure 5 After rough boring the first and second mounting holes 21 and 22, a reference angle of 2*60° is added between the first and second mounting holes 21 and 22. This angle facilitates the insertion of tools such as boring cutters and centers, facilitating machining, and also facilitates the use, assembly, and safety of the roller.

[0136] Reference Figure 6 When rough boring the first end, the soft jaws clamp the second end, and the center frame supports the first end to expose the second channel in the first end. The rough boring tool constructs the third mounting hole 11, the fourth mounting hole 12 and the fifth mounting hole 13 through the second channel.

[0137] Optionally, the soft jaw adopts a three-jaw soft jaw, so that one of the three-jaw soft jaws abuts against the end face of the second end. The soft jaw can not only well accommodate and clamp the second end, but also position the second end, thereby preventing the initial roller from moving axially during the rough boring process.

[0138] Continue to refer to Figure 6 During rough boring, a diameter margin of 0.5 is left for the third mounting hole 11, the fourth mounting hole 12 and the fifth mounting hole 13.

[0139] Continue to refer to Figure 6 After the third mounting hole 11 and the fourth mounting hole 12 are roughly bored, a reference angle of 2*60° is provided between the third mounting hole 11 and the fourth mounting hole 12 .

[0140] It should be explained that it is not necessary to provide a reference angle between the fourth mounting hole 12 and the fifth mounting hole 13. On the one hand, this is because the fifth mounting hole 13 is located inward and away from the outlet of the second channel, which has little impact on the subsequent parts assembly and assembly safety. On the other hand, the diameters of the fourth mounting hole 12 and the fifth mounting hole 13 are relatively close, and providing a reference angle between the two may easily damage the channel.

[0141] Optionally, after rough boring, the connection between the second mounting hole 22 and the first channel is deburred, and the connection between the fifth mounting hole 13 and the first channel is deburred.

[0142] Optionally, after rough boring the second end, the first mounting hole 21 is measured with a caliper to confirm that the diameter D1 of the first mounting hole 21 is 72+5 (upper deviation -0.5, lower deviation -0.6); the first mounting hole 21 is measured with a depth gauge to confirm that the depth C1 of the first mounting hole 21 is 15.4 (upper deviation 0, lower deviation -0.1).

[0143] Optionally, after rough boring the second end, the second mounting hole 22 is measured using an inner diameter gauge to confirm that the diameter D2 of the second mounting hole 22 is 25+5 (upper deviation -0.5, lower deviation -0.6).

[0144] Optionally, after rough boring the first end, measure the third mounting hole 11 with an inner diameter gauge to confirm that the diameter D3 of the third mounting hole 11 is D3=72+5 (upper deviation -0.5, lower deviation -0.6); measure the third mounting hole 11 with a depth gauge to confirm that the depth C2 of the third mounting hole 11 is C2=14 (upper deviation +0.05, lower deviation -0.05).

[0145] Optionally, after rough boring the first end, the diameter D4 of the fourth mounting hole 12 is measured using an internal diameter gauge to confirm that it is 47+5 (upper deviation -0.5, lower deviation -0.6); the total depth of the third mounting hole 11 and the fourth mounting hole 12 is measured using a depth gauge to confirm that the total depth C3 is 45.6 (upper deviation +0.05, lower deviation -0.05).

[0146] Optionally, after rough boring the first end, the fifth mounting hole 13 is measured with a caliper to confirm that the diameter D5 of the fifth mounting hole 13 is 42+5 (upper deviation -0.5, lower deviation -0.6).

[0147] Furthermore, in S3, when the second clamping position and the third clamping position are constructed, the top tip is pushed into the second channel at the first end and the third channel at the second end, and the initial roller runout is no more than 0.01.

[0148] For details, please refer to Figure 7 , use two centers, which are respectively pushed into the second mounting hole 22 and the fifth mounting hole 13; the centers can not only limit the axial operation or movement of the initial roller, but also drive the initial roller to rotate when necessary, so that the lathe can turn out the second clamping position and the third clamping position.

[0149] The initial roller runout is detected by a micrometer of 0.01AB to confirm the accuracy of the initial roller in the current processing state.

[0150] Reference Figure 8 When fine boring is performed on the first end, the soft jaw runout is corrected to no more than 0.01, so that the soft jaw clamps the second end and the center stand supports the first end, so that the fine boring tool acts on the third mounting hole 11, the fourth mounting hole 12 and the fifth mounting hole 13.

[0151] Optionally, the soft jaw adopts a three-jaw soft jaw, so that one of the three-jaw soft jaws abuts against the end face of the second end. The soft jaw can not only well accommodate and clamp the second end, but also position the second end, thereby preventing the initial roller from moving axially during the rough boring process.

[0152] Reference Figure 9 When fine boring is performed on the second end, the soft jaw runout is corrected to be no more than 0.01, so that the soft jaw clamps the first end and the center frame supports the second end, so that the fine boring tool acts on the first mounting hole 21 and the second mounting hole 22.

[0153] Optionally, the soft jaw adopts a three-jaw soft jaw, so that one of the three-jaw soft jaws abuts against the end face of the first end. The soft jaw can not only well accommodate and clamp the first end, but also position the first end, thereby preventing the initial roller from moving axially during the rough boring process.

[0154] Reference Figure 11 When processing the end face of the first end or the second end, the top is pushed into the third channel and the positioning core shaft is pressed against the step in the second channel, thereby ensuring the stability and axial accuracy of the initial roller.

[0155] For example, the positioning core shaft extends into the second channel and abuts against the third mounting hole 11 and the fourth mounting hole 12, which can not only limit the axial position of the initial roller, but also help to ensure the radial position of the initial roller, and can play a good role in positioning and calibration.

[0156] The top tip is inserted into the second mounting hole 22 and can cooperate with the positioning mandrel to fix the position of the initial roller to prevent the initial roller from displacement or movement. When necessary, the top tip and the positioning mandrel can also cooperate to drive the initial roller to rotate so as to facilitate lathe processing of the outer circle of the initial roller.

[0157] Reference Figure 8 and Figure 9 After the outer diameter of the initial roller is unified, a length allowance of 0.5 is left when the initial roller is calibrated for the first time; after the precision boring of the mounting hole is completed, the initial roller is fixed by cooperating with the soft jaws and the center frame, and then the two end faces of the initial roller are turned to remove 0.25 allowances respectively.

[0158] Optionally, when the soft claws clamp the initial roller, the jump of the soft claws is no more than 0.01.

[0159] Optionally, after turning out the second and third clamping positions, measure the two clamping positions with a caliper to confirm that the diameter B3 of the two clamping positions is 98.5 (upper deviation +0.1, lower deviation 0); measure the two clamping positions with a caliper to confirm that the length A4 of the two clamping positions is 120 (upper deviation +5, lower deviation -5); and measure the runout of the first end and the second end with a micrometer to be 0.01AB.

[0160] Optionally, after precision boring the third mounting hole 11 , the third mounting hole 11 is measured with a caliper to confirm that the diameter D3 of the third mounting hole 11 is 72 (upper deviation +0.3, lower deviation -0.3).

[0161] Optionally, after precision boring the fourth mounting hole 12 , the fourth mounting hole 12 is measured using a plug gauge and a gauge to confirm that the diameter D4 of the fourth mounting hole 12 is 47M6 (upper deviation −0.04, lower deviation −0.02).

[0162] Optionally, after precision boring the fifth mounting hole 13 , the fifth mounting hole 13 is measured with a caliper to confirm that the diameter D5 of the fifth mounting hole 13 is 42 (upper deviation +0.3, lower deviation -0.3).

[0163] Optionally, after precision boring the first end, measure the initial roller with a caliper to confirm that the length of the initial roller is 1060.3 (upper deviation + 0.1, lower deviation 0); measure the runout of the third mounting hole 11, the fourth mounting hole 12 and the fifth mounting hole 13 with a micrometer to be 0.01AB; measure the end face of the first end and the inner wall surfaces of the three mounting holes with a surface roughness meter to confirm that the surface roughness is Rz16.

[0164] Optionally, after precision boring the first mounting hole 21 , the first mounting hole 21 is measured with a caliper to confirm that the diameter D1 of the first mounting hole 21 is 72 (upper deviation +0.3, lower deviation -0.3).

[0165] Optionally, after precision boring the second mounting hole 22 , the second mounting hole 22 is measured using a plug gauge and a gauge to confirm that the diameter D2 of the second mounting hole 22 is 25H6 (upper deviation + 0.013, lower deviation 0).

[0166] Optionally, after precision boring the second end, the runout of the first mounting hole 21 and the second mounting hole 22 is measured by a micrometer to be 0.01AB; the end face of the second end and the inner wall surfaces of the two mounting holes are measured by a surface roughness meter to confirm that the surface roughness meets Rz16.

[0167] Optionally, after finishing the fine boring, the allowances at both ends of the initial roller are machined, and the initial roller is measured with a caliper to confirm that the length of the initial roller is 1060 (upper deviation + 0.2, lower deviation 0).

[0168] Optionally, after completing the fourth diameter calibration, measure the initial roller with a micrometer to confirm that the diameter of the initial roller is B4=98 (upper deviation +0.1, lower deviation +0.07); measure the runout of the initial roller with a micrometer to be 0.01AB; confirm the fillet R1 of the initial roller with an R gauge (upper deviation 0, lower deviation -0.2); and measure the surface roughness of the initial roller with a sample plate to be Ra3.2.

[0169] Furthermore, in S3, after finishing the precision boring of the second end, the first mounting hole 21 is drilled and tapped to construct the threaded hole 23, and the threaded hole 23 is inspected using a go / no-go gauge to ensure that the verticality of the threaded hole 23 is not greater than 0.5 / 100.

[0170] When assembling the roller, a gear is installed at the second end of the roller; the gear is installed in the third channel, and the first mounting hole 21 and the second mounting hole 22 are provided for the end of the gear to be inserted, and the gear abuts against the step between the first mounting hole 21 and the second mounting hole 22; a mounting hole connected to the threaded hole 23 is provided on the gear, and screws are screwed into the mounting hole and the threaded hole 23 to fasten the gear and the roller.

[0171] To create the threaded hole 23, a large radial drill is used to drill into the first mounting hole 21, followed by tapping. Since the connection between the roller and the gear is generally circular, three threaded holes 23 can optionally be created in the first mounting hole 21, spaced evenly along the circumference of the same circle. During assembly, the gear and roller are fastened together using three screws, resulting in a more stable assembly.

[0172] Optionally, after the threaded hole 23 is opened, the threaded hole 23 is inspected by a three-dimensional coordinate measuring machine (CMM) to confirm that the diameter of the threaded hole 23 meets 50 (upper deviation +0.2, lower deviation -0.2); the threaded hole 23 is inspected by a thread plug gauge to confirm that the threaded hole 23 meets M8; the threaded hole 23 is inspected by a plug gauge and a square, or by a three-dimensional coordinate measuring machine (CMM) to confirm that the verticality of the threaded hole 23 meets 0.5 / 100.

[0173] Optionally, in S3, after completing the precision boring of the first end and the second end and completing the construction of the threaded hole 23, the burrs in the first mounting hole 21, the second mounting hole 22, the third mounting hole 11, the fourth mounting hole 12, the fifth mounting hole 13 and / or the threaded hole 23 are removed, and the waste chips in the initial roller are cleaned.

[0174] Specifically, remove burrs manually or with a grinding device, and then use a dust removal device to remove dust from the inside or surface of the initial roller. During the processing, be careful to avoid scratching or wearing the end surface of the initial roller and the inner wall of the mounting hole.

[0175] Furthermore, the method for preparing the porous segment roller provided in the present application further includes S4. post-processing:

[0176] The initial roller is coarsely ground to the surface Ra0.35 and Rz3 of the initial roller;

[0177] Fine grinding of the initial roller to the surface Ra0.3, Rz2.5;

[0178] The initial roller is polished to a surface Ra0.25, Rz2.

[0179] After the round tube 30, the first plug 10 and the second plug 20 are connected together through the three processing stages (S1, S2 and S3) described above, the initial roller is processed multiple times so that it has the required outer diameter and length, and five required mounting holes are constructed at both ends of the initial roller. The five mounting holes are connected to the first channel in the middle of the initial roller. The porous channel formed can not only cooperate with the roller shaft to pass through, but also provide a basis for the assembly of subsequent parts.

[0180] After the roller is prepared, the appearance of the roller is optimized and the size of the roller is confirmed through post-processing.

[0181] The post-processing method provided in this application processes the surface of the initial roller in stages through three processes: rough grinding, fine grinding and polishing, which is beneficial to the grinding efficiency and final grinding accuracy.

[0182] Specifically, in S4:

[0183] Reference Figure 12The outer circle of the initial roller is roughly ground by the grinder water tank. The grinder water tank uses a green silicon carbide 46-mesh grinding wheel. During the rough grinding process, the grinder water tank feeds the knife back and forth multiple times. The last two reciprocating times reduce the feed and grinding amount to ensure that the roundness of the outer circle of the initial roller is 0.01.

[0184] Optionally, when rough grinding the outer circle of the initial roller, a secondary filter device of the grinder water tank is used, and a green silicon carbide grinding wheel with a specification of P600x75x305mm GC46# is used, Ap=0.0025, reciprocating feed, Vf=1200mm / min.

[0185] Optionally, after completing the rough grinding of the outer circle of the initial roller, measure the initial roller with a micrometer to confirm that the outer diameter of the initial roller is a preset value of 98 (upper deviation + 0.02, lower deviation 0); measure the initial roller with a micrometer to confirm that the runout of the initial roller is 0.01AB; use a surface roughness meter to measure the initial roller to confirm that the surface roughness of the initial roller is Ra0.35, Rz3.

[0186] Reference Figure 13 The outer circle of the initial roller is finely ground by the grinder water tank. The grinder water tank uses a green silicon carbide 120-mesh grinding wheel. During the fine grinding process, the grinder water tank feeds the tool back and forth for multiple times. Finally, no grinding is done and the tool moves back and forth for two round trips to ensure that the circular runout of the outer circle of the initial roller is 0.01AB.

[0187] Optionally, when fine grinding the outer circle of the initial roller, a secondary filter device of the grinder water tank is used, and a green silicon carbide grinding wheel with a specification of P600x75x305mm GC120# is used, Ap=0.0025, unidirectional feed, Vf=220mm / min.

[0188] Optionally, after completing the fine grinding of the outer cylinder of the initial roller, measure the initial roller with a micrometer to confirm that the length of the initial roller is a preset value of 98 (upper deviation 0, lower deviation -0.1); measure the initial roller with a micrometer to confirm that the runout of the initial roller is 0.01AB; use a surface roughness meter to measure the initial roller to confirm that the surface roughness of the initial roller is Ra0.3, Rz2.5.

[0189] Reference Figure 14 , use a 600-mesh polishing disc to polish the outer circle of the initial roller to further optimize the roughness of the outer circle of the initial roller.

[0190] Optionally, after the outer circle of the initial roller is polished, the initial roller is measured using a surface roughness meter to confirm that the surface roughness of the initial roller is Ra0.25, Rz2.

[0191] Optionally, after the initial roller is polished, the initial roller is visually inspected at a light intensity of 1000~1500lx and a distance of 0.5m (refer to the "Specifications for Limit Requirements of Measuring Rollers").

[0192] Optionally, after completing the rough grinding, fine grinding or polishing of the initial roller, the appearance of the initial roller can be visually inspected to check whether vertical lines are present; avoiding vertical lines caused by grinding is beneficial to the appearance of the initial roller.

[0193] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A method for preparing a porous segment roller, characterized in that: The following steps are included: S1. Rough machining: By friction welding, one end of the round tube (30) is connected to the first plug (10) and the other end is connected to the second plug (20) to obtain an initial roller; The outer diameters of the first plug (10) and the second plug (20) are aligned with the outer diameters of the circular tube (30); The length of the initial roller is A1 and the diameter is B1; In the initial roller, the end where the first plug (10) is located is the first end, and the end where the second plug (20) is located is the second end; A first clamping position is processed at the first end, wherein the length of the first clamping position is A2 and the diameter is B2, where A2 is less than ½ A1 and B2 is less than B1; The second end is aligned with the first clamping position until the initial roller diameter is B2; Processing the end surface of the initial roller until the length of the initial roller is A3, A3 < A1; S2. Opening: Rough boring the second end to form a first mounting hole (21); The first mounting hole (21) has a depth of C1 and a diameter of D1+n, where n is a margin; Rough boring the second end to construct a second mounting hole (22) in the first mounting hole (21); The diameter of the second mounting hole (22) is D2+n, D2<D1; Rough boring the first end to form a third mounting hole (11); The third mounting hole (11) has a depth of C2 and a diameter of D3+n; Rough boring the first end to construct a fourth mounting hole (12) in the third mounting hole (11); The total depth of the third mounting hole 11 and the fourth mounting hole (12) is C3, and the diameter of the fourth mounting hole (12) is D4+n; Rough boring the first end to construct a fifth mounting hole (13) in the fourth mounting hole (12); The diameter of the fifth mounting hole (13) is D5+n, D5<D4<D3; S3. Finishing: Processing a second clamping position at the first end and processing a third clamping position at the second end; The length of the second clamping position and the third clamping position is A4, and the diameter is B3, A4<½A3, B3<B2; Precision boring the first end and the second end so that the diameter of the first mounting hole (21) is D1, the diameter of the second mounting hole (22) is D2, the diameter of the third mounting hole (11) is D3, the diameter of the fourth mounting hole (12) is D4, and the diameter of the fifth mounting hole (13) is D5; Processing the first end and the second end until the diameter of the initial roller is B4, B4 < B3; The end surface of the initial roller is processed until the length of the initial roller is A5, where A5 is less than A3.

2. The method for preparing a porous segment roller according to claim 1, characterized in that: In S1, during friction welding, the spindle spring clamp of the friction welding machine clamps the first plug (10) and the hydraulic clamp clamps the round tube (30), or the spindle spring clamp of the friction welding machine clamps the second plug (20) and the hydraulic clamp clamps the round tube (30); in: When the first plug (10) or the second plug (20) is clamped by the spindle spring clamp, the spindle spring clamp has a runout of less than 0.1; And / or, when the round tube (30) is clamped by the hydraulic clamp, the guide rail position of the hydraulic clamp is adjusted so that the runout between the hydraulic clamp and the spindle spring clamp is less than 0.

5.

3. The method for preparing a porous segment roller according to claim 1, characterized in that: In S1: After friction welding, when processing the first plug (10) and the second plug (20), first chamfer the second channel opening of the first plug (10) by 2*60°, and then chamfer the third channel opening of the second plug (20) by 2*60°; Positioning tools include top tips; The top is pushed into the second channel or the third channel through the chamfer, and the positioning tool can stabilize the initial roller to facilitate lathe processing.

4. The method for preparing a porous segment roller according to claim 3, characterized in that: Positioning tools include centers, soft jaws, and steady rests; In S1: After obtaining the initial roller, the soft jaws clamp the second end and the top is pushed into the second channel, so as to facilitate lathe processing of the first end and construct the first clamping position; and / or, after obtaining the first clamping position, the soft jaws clamp the first end and the top is pushed into the third channel, so that the lathe can process from the second end until the outer diameter of the initial roller is uniform; and / or, when machining the end surface of the first end, the soft jaws clamp the second end and the center frame supports the first end, so as to expose the end surface of the first end and ensure the stability of the first end; And / or, when processing the end surface of the second end, the soft claws clamp the first end and the center frame supports the second end, so as to expose the end surface of the second end and ensure the stability of the second end.

5. The method for preparing a porous segment roller according to claim 1, characterized in that: Positioning tools include soft jaws and steady rests; In S2: When rough boring the second end, the soft jaws clamp the first end, and the center frame supports the second end, so as to expose the third channel at the second end, and the rough boring tool constructs the first mounting hole (21) and the second mounting hole (22) through the third channel; and / or, when rough boring the first end, the soft jaws clamp the second end, the center stand supports the first end, so as to expose the second channel at the first end, and the rough boring tool constructs the third mounting hole (11), the fourth mounting hole (12) and the fifth mounting hole (13) through the second channel; and / or, during rough boring, a diameter margin of 0.5 is left for the first mounting hole (21), the second mounting hole (22), the third mounting hole (11), the fourth mounting hole (12), and the fifth mounting hole (13); and / or, a reference angle of 2*60° is formed between the first mounting hole (21) and the second mounting hole (22); And / or, a reference angle of 2*60° is formed between the third mounting hole (11) and the fourth mounting hole (12).

6. The method for preparing a porous segment roller according to claim 1, characterized in that: Positioning tools include centers, soft jaws, center rests, and positioning mandrels; In S3: When processing the second clamping position and the third clamping position, the top is pushed into the second channel at the first end and the third channel at the second end, and the initial roller runout is no more than 0.01; and / or, when precision boring the first end, the soft jaws clamp the second end, and the center stand supports the first end, so that the precision boring tool acts on the third mounting hole (11), the fourth mounting hole (12), and the fifth mounting hole (13); and / or, when precision boring the second end, the soft jaws clamp the first end, and the center stand supports the second end, so that the precision boring tool acts on the first mounting hole (21) and the second mounting hole (22); and / or, when the soft jaws clamp the initial roller, the jump of the soft jaws is no more than 0.01; And / or, when processing the end face of the first end or the second end, the top is pushed into the third channel and the positioning core shaft abuts against the step in the second channel, thereby ensuring the stability and axial accuracy of the initial roller.

7. The method for preparing a porous segment roller according to claim 1, characterized in that: In S3: After completing the precision boring of the second end, drilling and tapping are performed in the first mounting hole (21) to construct a threaded hole (23), and the threaded hole (23) is inspected using a go / no-go gauge to ensure that the verticality of the threaded hole (23) is not greater than 0.5 / 100.

8. The method for preparing a porous segment roller according to claim 7, characterized in that: In S3: After completing the precision boring of the first end and the second end and completing the construction of the threaded hole (23), burrs in the first mounting hole (21), the second mounting hole (22), the third mounting hole (11), the fourth mounting hole (12), the fifth mounting hole (13) and / or the threaded hole (23) are removed, and waste chips in the initial roller are cleaned.

9. The method for preparing a porous segment roller according to any one of claims 1 to 8, characterized in that: Also includes S4. Post-processing: The initial roller is coarsely ground until the surface roughness of the initial roller is Ra0.35, Rz3; Fine grinding the initial roller until the surface roughness of the initial roller is Ra0.3 and Rz2.5; The initial roller is polished until the surface roughness of the initial roller is Ra0.25, Rz2.

10. The method for preparing a porous segment roller according to claim 9, characterized in that: In S4: The outer circle of the initial roller is roughly ground by a grinding machine water tank, and a green silicon carbide 46-grit grinding wheel is used in the grinding machine water tank. During the rough grinding process, the grinding machine water tank feeds the knife back and forth multiple times, and the feed and grinding amount are reduced in the last two reciprocating cycles; and / or, fine grinding the outer circle of the initial roller by a grinding machine water tank, wherein the grinding machine water tank uses a green silicon carbide 120-grit grinding wheel, and during the fine grinding process, the grinding machine water tank feeds the knife back and forth multiple times, and finally stops grinding and the knife moves back and forth for two times; and / or, after finishing fine grinding the initial roller, inspecting the appearance of the initial roller to ensure that no vertical lines are present; and / or, polishing the outer circumference of the initial roller using a 600-mesh polishing disc; And / or, after polishing the initial roller, the initial roller is subjected to an appearance inspection at a light intensity of 1000-1500 lx and a distance of 0.5 m.

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