Manufacturing method of large tension stretcher beam

Abstract

The application relates to a processing and manufacturing method of a large tension stretcher beam. The application is processed and positioned in sections through four large planes. Before each large plane is processed, two reference surfaces are precisely processed as references, and then the large plane is precisely processed by taking the reference surfaces as reference surfaces after verification through a laser tracker, so that the plane processing precision requirement of the large size beam is effectively ensured; boring and milling alignment bands are performed on the long pin long hole arc surfaces, and after alignment through the alignment bands, the long pin long hole is precisely processed, so that the size precision, roundness and roughness of the long pin long hole are effectively ensured, and the beam processing efficiency is greatly improved. The application effectively ensures the processing and manufacturing quality of the beam and guarantees other technical requirements of drawings.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a method for manufacturing a pressure beam for a large tension stretching machine. Background Technology

[0002] The 125MN stretching machine is a high-precision, ultra-heavy-duty piece of equipment developed in my country for the first time, possessing completely independent intellectual property rights. Due to limitations imposed by transportation, casting, heat treatment conditions, and installation space constraints on auxiliary equipment, the key component—the pressure beam assembly—is divided into three sections of varying lengths, based on usage requirements. Figure 1 As shown, the maximum external dimensions of the pressure beam are φ1700mm x 16100mm, with a single weight of 158.45 tons. The external dimensions of the working section are 1420±0.1 x 1420±0.1, and the working area length is 15550mm. The surface roughness of all four planes A, B, C, and D is Ra3.2. The four planes A, B, C, and D are perpendicular and parallel to each other, with geometric tolerances of perpendicularity 0.1mm, parallelism 0.1mm, and flatness 0.1mm. The geometric tolerance accuracy level is required to reach level 6, which is an ultra-high precision plane. In addition, after the pressure beam assembly is segmented, there are 9 long pin holes evenly distributed along the length of the pressure beam. The dimensions of the long pin holes are R290H8 x 1120±0.1, and the center-to-center distance between the holes is 1600±0.1mm.

[0003] Because the pressure beams are used in groups and the pin holes in each group are required to be in the same position, coupled with the large working area and long length of the pressure beams, the unavoidable severe tool wear during finishing, and the influence of the positioning accuracy of the gantry milling machine itself, the conventional processing methods cannot meet the manufacturing accuracy requirements of the pressure beams. Summary of the Invention

[0004] To overcome the shortcomings of the prior art and meet the processing and manufacturing requirements of parts, the present invention provides a method for processing and manufacturing a large tension stretching machine pressure beam.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a method for processing and manufacturing a large tension beam of a tensioning machine, comprising the following steps:

[0006] Step 1: Place leveling pads on the gantry milling machine's worktable. Define the four large surfaces of the pressure beam for finishing as surface A, surface B, surface C, and surface D. Hoist the pressure beam onto the leveling pads, with surface A facing upwards and surface C in contact with the leveling pads.

[0007] Step 2: Following the previous step, machine two reference surfaces A1 and A2 on surface A for fine milling alignment;

[0008] Step 3: Following the previous step, use a laser tracker to verify and check the flatness of datum surfaces A1 and A2 respectively; then use the laser tracker to verify and check the coplanarity of datum surfaces A1 and A2 and make corrections to ensure that datum surfaces A1 and A2 are coplanar.

[0009] Step 4: Following the previous step, use reference plane A1 and reference plane A2 to align the beams, and then finish mill the remaining part of surface A along the left and right sides of the beam length. After finishing surface A, use a laser tracker to check the flatness of surface A and record it.

[0010] Step 5: Following the previous step, adjust the assembly so that surface A is placed on the leveling pads. Align it according to the rough machining surface. Machin two sections on surface C, C1 and C2, which will be used as reference surfaces for fine milling alignment.

[0011] Step Six: Following the previous step, use a laser tracker to verify and check the flatness of datum surfaces C1 and C2 respectively; then use the laser tracker to verify and check the coplanarity of datum surfaces C1 and C2 and make corrections to ensure that datum surfaces C1 and C2 are coplanar; use the laser tracker to verify and check the parallelism between datum surfaces C1 and C2 and surface A.

[0012] Step 7: Following the previous step, use reference plane C1 and reference plane C2 to align the beams. Then, mill the remaining part of surface C along the left and right sides of the beam length. After finishing surface C, use a laser tracker to check and record the flatness of surface C. Also, use a laser tracker to check and record the parallelism between surface C and surface A.

[0013] Step 8: Following the previous step, replace the angle milling head, align it according to the roughing surface, and machine two reference surfaces B1 and B2 on surface B for fine milling alignment.

[0014] Step 9: Following the previous step, use a laser tracker to verify and check the flatness of datum surfaces B1 and B2 respectively; use a laser tracker to verify and check the coplanarity of datum surfaces B1 and B2 and make corrections to ensure that datum surfaces B1 and B2 are coplanar; use a laser tracker to verify and check the perpendicularity between datum surfaces B1 and B2 and surfaces A / C.

[0015] Step 10: Following the previous step, use reference planes B1 and B2 to align the beams. Then, mill the remaining portion of surface B along the left and right sides of the beam length. After finishing surface B, use a laser tracker to check and record the flatness of surface B. Also, use a laser tracker to check and record the perpendicularity of surface B to surface A / C.

[0016] Step 11: Following the previous step, use an angle milling head to align the roughing surface and machine two reference surfaces D1 and D2 on surface D for fine milling alignment.

[0017] Step 12: Following the previous step, use a laser tracker to verify and check the flatness of datum surfaces D1 and D2 respectively. Use the laser tracker to verify and check the coplanarity of datum surfaces D1 and D2 and make corrections to ensure that datum surfaces D1 and D2 are coplanar. Use the laser tracker to verify and check the perpendicularity of datum surfaces D1 and D2 to surfaces A / C. Use the laser tracker to verify and check the parallelism of datum surfaces D1 and D2 to surface B.

[0018] Step 13: Following the previous step, use reference planes D1 and D2 to align the beams. Then, mill the remaining portion of surface D along both sides of the beam length. After finishing surface D, use a laser tracker to check and record the flatness of surface D. Also, use a laser tracker to check and record the perpendicularity of surface D to surface A / C. Finally, use a laser tracker to check and record the parallelism of surface D to surface B.

[0019] Step Fourteen: Following the previous step, using an angle milling head, with the segmented pressure beam mating surface as the reference, precision bore the alignment band F1 of the pin elongated hole on surface B, and precision bore the alignment band F2 of the pin elongated hole on surface D.

[0020] Step 15: Following the previous step, use a laser tracker to verify and check the dimensional tolerance accuracy of the alignment band F1 on surface B and the alignment band F2 on surface D relative to the joint surface of the segmented pressure beam, and make corrections accordingly.

[0021] Step 16: Following the previous step, the pressure beam is hoisted onto the CNC boring and milling machine, and then aligned with the alignment belts F1 and F2 respectively, and the long holes of each pin on the B and D surfaces are bored and milled.

[0022] As a preferred embodiment, the distance between the reference surface A1 and the reference surface A2 is L, the distance between the reference surface A1 and the segmented joint surface is M, and the width of the reference surface A1 and the reference surface A2 is N.

[0023] As a preferred embodiment, the spacing between reference surfaces B1 and B2 is equal to the spacing between reference surfaces A1 and A2; the spacing between reference surfaces C1 and C2 is equal to the spacing between reference surfaces A1 and A2; the spacing between reference surfaces D1 and D2 is equal to the spacing between reference surfaces A1 and A2; the spacing between reference surface B1 and the segment joint surface is equal to the spacing between reference surface A1 and the segment joint surface; the spacing between reference surface C1 and the segment joint surface is equal to the spacing between reference surface A1 and the segment joint surface; the spacing between reference surface D1 and the segment joint surface is equal to the spacing between reference surface A1 and the segment joint surface; and the widths of reference surfaces B1, B2, C1, C2, D1, D2, and A1 are equal.

[0024] As a preferred embodiment, the spacing L ranges from 6 to 10 m, the spacing M ranges from 3 to 3.2 m, and the width N ranges from 180 to 240 mm.

[0025] As a preferred embodiment, the flatness tolerance of each of the reference surfaces A1 and A2 is 0-0.02mm, and the coplanarity tolerance of the two reference surfaces A1 and A2 is 0-0.04mm.

[0026] As a preferred embodiment, the flatness tolerance of each of the reference surfaces B1 and B2 is 0-0.02mm, the coplanarity tolerance of the two reference surfaces B1 and B2 is 0-0.04mm, and the perpendicularity tolerance between the reference surfaces B1 and B2 and surface A is 0-0.05mm.

[0027] As a preferred embodiment, the flatness tolerance of each of the reference surfaces C1 and C2 is 0-0.02mm, the coplanarity tolerance of the two reference surfaces C1 and C2 is 0-0.04mm, and the parallelism tolerance between the reference surfaces C1 and C2 and surface A is 0-0.05mm.

[0028] As a preferred embodiment, the flatness tolerance of each of the reference surfaces D1 and D2 is 0-0.02 mm, the coplanarity tolerance of the two reference surfaces D1 and D2 is 0-0.04 mm, the perpendicularity tolerance of reference surfaces D1 and D2 to surface A is 0-0.05 mm, and the parallelism tolerance of reference surfaces D1 and D2 to surface B is 0-0.05 mm.

[0029] As a preferred embodiment, the correction tolerance range in step fifteen is ±0.05 mm.

[0030] The beneficial effects of this application are as follows: By segmenting and positioning the four large planes for machining, before machining each large plane, two reference surfaces are first precision machined as references. Then, after verification by a laser tracker, the large plane is precision machined using the reference surfaces as references, effectively ensuring the machining accuracy requirements of the large-size pressure beam planes. Furthermore, a milling and alignment band is applied to the arc surface of the pin elongated hole, and after alignment with this band, the pin elongated hole is precision machined, effectively ensuring the dimensional accuracy, roundness, and surface roughness requirements of the pin elongated hole, greatly improving the machining efficiency of the pressure beam. This invention effectively guarantees the manufacturing quality of the pressure beam and ensures other technical requirements of the drawings. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the pressure beam of the present invention;

[0032] Figure 2 for Figure 1 Center view;

[0033] Figure 3 This is a schematic diagram of the processing of surface A according to the present invention;

[0034] Figure 4This is a tool path diagram for the precision milling cutter head used in machining surface A of this invention;

[0035] Figure 5 This is a schematic diagram of the C-side machining process according to the present invention;

[0036] Figure 6 This is a schematic diagram of the process for machining the elongated hole of the pin according to the present invention.

[0037] Markings in the diagram: 1. Surface A, 101. Reference Surface A1, 102. Reference Surface A2, 2. Surface B, 3. Surface C, 301. Reference Surface C1, 302. Reference Surface C2, 4. Surface D, 401. Reference Surface D1, 402. Reference Surface D2, 5. Equal Height Shim, 6. Milling Cutter Head Tracking Direction, 7. Segmented Pressure Beam Joint Surface. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that, in the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Please see Figure 1 This invention provides a method for processing and manufacturing a large tension beam for a tensioning machine, comprising the following steps:

[0040] Step 1: Place leveling pads 5 on the gantry milling machine's worktable. Define the four large faces of the pressure beam for finishing as face A1, face B2, face C3, and face D4. Hoist the pressure beam onto the leveling pads 5, with face A1 facing upwards and face C3 in contact with the leveling pads 5.

[0041] Step 2: Following the previous step, set two reference surfaces A1 101 and A2 102 on surface A1 for fine milling alignment. The distance between reference surfaces A1 101 and A2 102 is 8m, the distance between reference surface A1 101 and the segmented joint surface is 3.15m, and the width of reference surfaces A1 101 and A2 102 is 200mm.

[0042] Step 3: Following the previous step, use a laser tracker to verify and check the flatness of datum surfaces A1101 and A2102 respectively. The allowable tolerance for the flatness of datum surfaces A1101 and A2102 is 0-0.02mm. Then, use a laser tracker to verify and check the coplanarity of datum surfaces A1101 and A2102. The allowable tolerance for the coplanarity of datum surfaces A1101 and A2102 is 0-0.04mm.

[0043] Step 4: Following the previous step, using reference plane A1 101 and reference plane A2 102 for alignment, fine mill the remaining portion of surface A1 along both sides of the beam length, as shown in the figure. Figure 4 The milling cutter head moves in the direction 6 as shown. After finishing surface A1, the flatness of surface A1 is checked and recorded using a laser tracker.

[0044] Step 5: Following the previous step, adjust the assembly so that surface A1 is placed on the leveling pad 5. Align it according to the rough machining surface. Set two reference surfaces C1 301 and C2 302 on surface C3 for fine milling alignment. The distance between reference surfaces C1 301 and C2 302 is 8m. The distance between reference surface C1 301 and the segment joint surface is 3.15m. The width of reference surfaces C1 301 and C2 302 is 200mm.

[0045] Step Six: Following the previous step, use a laser tracker to verify and check the flatness of datum surfaces C1 301 and C2 302 respectively. The allowable tolerance for the flatness of datum surfaces C1 301 and C2 302 is 0-0.02mm. Then, use a laser tracker to verify and check the coplanarity of datum surfaces C1 301 and C2 302. The allowable tolerance for the coplanarity of datum surfaces C1 301 and C2 302 is 0-0.04mm. Use a laser tracker to verify and check the parallelism between datum surfaces C1 301 and C2 302 and surface A1. The allowable tolerance for the parallelism between datum surfaces C1 301 and C2 302 and surface A1 is 0-0.05mm.

[0046] Step 7: Following the previous step, align with reference planes C1 301 and C2 302 respectively, and finish mill the remaining part of C surface 3 on both sides of the length of the pressure beam, consistent with the tool movement direction in step 4. After finishing C surface 3, use a laser tracker to check and record the flatness of C surface 3, and use a laser tracker to check and record the parallelism between C surface 3 and A surface 1.

[0047] Step 8: Following the previous step, replace the angle milling head and align it according to the roughing surface. Set two reference surfaces B1 and B2 on surface B2 for fine milling alignment. The distance between reference surfaces B1 and B2 is 8m, the distance between reference surface B1 and the segment joint surface is 3.15m, and the width of reference surfaces B1 and B2 is 200mm.

[0048] Step 9: Following the previous step, use a laser tracker to verify and check the flatness of datum surfaces B1 and B2 respectively. The allowable tolerance for the flatness of datum surfaces B1 and B2 is 0-0.02mm. Use a laser tracker to verify and check the coplanarity of datum surfaces B1 and B2. The allowable tolerance for the coplanarity of datum surfaces B1 and B2 is 0-0.04mm. Use a laser tracker to verify and check the perpendicularity between datum surfaces B1 and B2 and surface A1 / surface C3. The allowable tolerance for the perpendicularity between datum surfaces B1 and B2 and surface A1 / surface C3 is 0-0.05mm.

[0049] Step 10: Following the previous step, use reference planes B1 and B2 to align the beams. Then, mill the remaining portion of surface B2 along the left and right sides of the beam length, consistent with the tool path in step 4. After finishing surface B2, use a laser tracker to check and record the flatness of surface B2. Also, use a laser tracker to check and record the perpendicularity of surface B2 to surface A1.

[0050] Step 11: Following the previous step, use an angle milling head to align the roughing surface. Set two reference surfaces, D1 401 and D2 402, on surface D4 for fine milling alignment. The distance between reference surfaces D1 401 and D2 402 is 8m, the distance between reference surface D1 401 and the segment joint surface is 3.15m, and the width of reference surfaces D1 401 and D2 402 is 200mm.

[0051] Step Twelve: Following the previous step, use a laser tracker to verify and check the flatness of datum surfaces D1 401 and D2 402 respectively. The allowable tolerance for the flatness of datum surfaces D1 401 and D2 402 is 0-0.02mm. Use the laser tracker to verify and check the coplanarity of datum surfaces D1 401 and D2 402. The allowable tolerance for the coplanarity of datum surfaces D1 401 and D2 402 is 0-0.04mm. Use the laser tracker to verify and check the perpendicularity of datum surfaces D1 401 and D2 402 to surface A1. The allowable tolerance for the perpendicularity of datum surfaces D1 401 and D2 402 to surface A1 is 0-0.05mm. Use the laser tracker to verify and check the parallelism of datum surfaces D1 401 and D2 402 to surface B2. The parallelism tolerance between 402 and surface B2 is 0-0.05mm;

[0052] Step 13: Following the previous step, align with reference planes D1 401 and D2 402 respectively, and finish mill the remaining part of surface D4 along the left and right sides of the pressure beam length, consistent with the tool movement direction in step 4. After finishing surface D4, use a laser tracker to check and record the flatness of surface D4, and use a laser tracker to check and record the perpendicularity of surface D4 to surface A1 and the parallelism of surface D4 to surface B2.

[0053] Step Fourteen: Following the previous step, use an angle milling head, with the segmented pressure beam joint surface 7 as the reference, precision bore the alignment band F1 of the pin elongated hole on surface B, and precision bore the alignment band F2 of the pin elongated hole on surface D;

[0054] Step 15: Following the previous step, use a laser tracker to verify and check the dimensional tolerance accuracy of the alignment band F1 on surface B2 and the alignment band F2 on surface D relative to the segmented pressure beam mating surface 7, and make corrections; the correction tolerance range is ±0.05mm;

[0055] Step 16: Following the previous step, the pressure beam is hoisted onto the CNC boring and milling machine TK6926, and then aligned with the alignment belts F1 and F2 respectively, and the long holes of each pin on surface B2 and surface D4 are bored and milled.

[0056] After processing, the processed pressure beam is transferred to the designated area using lifting equipment. Parts not detailed in this invention are existing technologies. The processing and manufacturing method of this application, by processing four planes in segments, and selecting two reference planes as references for each plane, effectively ensures the processing accuracy requirements of the large-size pressure beam planes. Furthermore, milling a aligning band on the long hole plane of the pin and then using the aligning band for alignment before processing effectively ensures the dimensional accuracy, roundness, and roughness requirements of the long hole, greatly improving processing efficiency. This invention effectively guarantees the processing and manufacturing quality of the pressure beam and meets other technical requirements of the drawings. It solves the problems of large-size, high-precision plane processing control of large pressure beams and consistent hole position accuracy control of long-size multi-hole systems, providing a novel processing method for this type of part.

[0057] It should be noted that the above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for processing and manufacturing a pressure beam for a large tension stretching machine, characterized in that, Includes the following steps: Step 1: Place leveling pads on the gantry milling machine's worktable. Define the four large surfaces of the pressure beam for finishing as surface A, surface B, surface C, and surface D. Hoist the pressure beam onto the leveling pads, with surface A facing upwards and surface C in contact with the leveling pads. Step 2: Following the previous step, machine two reference surfaces A1 and A2 on surface A for fine milling alignment; Step 3: Following the previous step, use a laser tracker to verify and check the flatness of datum surfaces A1 and A2 respectively; then use the laser tracker to verify and check the coplanarity of datum surfaces A1 and A2 and make corrections to ensure that datum surfaces A1 and A2 are coplanar. Step 4: Following the previous step, use reference plane A1 and reference plane A2 to align the beams, and then finish mill the remaining part of surface A along the left and right sides of the beam length. After finishing surface A, use a laser tracker to check the flatness of surface A and record it. Step 5: Following the previous step, adjust the assembly so that surface A is placed on the leveling pads. Align it according to the rough machining surface. Machin two sections on surface C, C1 and C2, which will be used as reference surfaces for fine milling alignment. Step Six: Following the previous step, use a laser tracker to verify and check the flatness of datum surfaces C1 and C2 respectively; then use the laser tracker to verify and check the coplanarity of datum surfaces C1 and C2 and make corrections to ensure that datum surfaces C1 and C2 are coplanar; use the laser tracker to verify and check the parallelism between datum surfaces C1 and C2 and surface A. Step 7: Following the previous step, use reference plane C1 and reference plane C2 to align the beams. Then, mill the remaining part of surface C along the left and right sides of the beam length. After finishing surface C, use a laser tracker to check and record the flatness of surface C. Also, use a laser tracker to check and record the parallelism between surface C and surface A. Step 8: Following the previous step, replace the angle milling head, align it according to the roughing surface, and machine two reference surfaces B1 and B2 on surface B for fine milling alignment. Step 9: Following the previous step, use a laser tracker to verify and check the flatness of datum surfaces B1 and B2 respectively; use a laser tracker to verify and check the coplanarity of datum surfaces B1 and B2 and make corrections to ensure that datum surfaces B1 and B2 are coplanar; use a laser tracker to verify and check the perpendicularity between datum surfaces B1 and B2 and surfaces A / C. Step 10: Following the previous step, use reference planes B1 and B2 to align the beams. Then, mill the remaining portion of surface B along the left and right sides of the beam length. After finishing surface B, use a laser tracker to check and record the flatness of surface B. Also, use a laser tracker to check and record the perpendicularity of surface B to surface A / C. Step 11: Following the previous step, use an angle milling head to align the roughing surface and machine two reference surfaces D1 and D2 on surface D for fine milling alignment. Step 12: Following the previous step, use a laser tracker to verify and check the flatness of datum surfaces D1 and D2 respectively. Use the laser tracker to verify and check the coplanarity of datum surfaces D1 and D2 and make corrections to ensure that datum surfaces D1 and D2 are coplanar. Use the laser tracker to verify and check the perpendicularity of datum surfaces D1 and D2 to surfaces A / C. Use the laser tracker to verify and check the parallelism of datum surfaces D1 and D2 to surface B. Step 13: Following the previous step, use reference planes D1 and D2 to align the beams. Then, mill the remaining portion of surface D along both sides of the beam length. After finishing surface D, use a laser tracker to check and record the flatness of surface D. Also, use a laser tracker to check and record the perpendicularity of surface D to surface A / C. Finally, use a laser tracker to check and record the parallelism of surface D to surface B. Step Fourteen: Following the previous step, using an angle milling head, with the segmented pressure beam mating surface as the reference, precision bore the alignment band F1 of the pin elongated hole on surface B, and precision bore the alignment band F2 of the pin elongated hole on surface D. Step 15: Following the previous step, use a laser tracker to verify and check the dimensional tolerance accuracy of the alignment band F1 on surface B and the alignment band F2 on surface D relative to the joint surface of the segmented pressure beam, and make corrections accordingly. Step 16: Following the previous step, the pressure beam is hoisted onto the CNC boring and milling machine, and then aligned with the alignment belts F1 and F2 respectively, and the long holes of each pin on the B and D surfaces are bored and milled.

2. The method for processing and manufacturing a large tension beam for a tensioning machine according to claim 1, characterized in that: The distance between the reference plane A1 and the reference plane A2 is L, the distance between the reference plane A1 and the segmented joint surface is M, and the width of the reference plane A1 and the reference plane A2 is N.

3. The method for processing and manufacturing a large tension stretching machine pressure beam according to claim 2, characterized in that: The spacing between reference surfaces B1 and B2 is equal to the spacing between reference surfaces A1 and A2. The spacing between reference surfaces C1 and C2 is equal to the spacing between reference surfaces A1 and A2. The spacing between reference surfaces D1 and D2 is equal to the spacing between reference surfaces A1 and A2. The spacing between reference surface B1 and the segment joint surface is equal to the spacing between reference surface A1 and the segment joint surface. The spacing between reference surface C1 and the segment joint surface is equal to the spacing between reference surface A1 and the segment joint surface. The spacing between reference surface D1 and the segment joint surface is equal to the spacing between reference surface A1 and the segment joint surface. The widths of reference surfaces B1, B2, C1, C2, D1, D2, and A1 are equal.

4. The method for processing and manufacturing a large tension beam for a tensioning machine according to claim 2, characterized in that: The spacing L ranges from 6 to 10 m, the spacing M ranges from 3 to 3.2 m, and the width N ranges from 180 to 240 mm.

5. The method for processing and manufacturing a large tension stretching machine pressure beam according to claim 2, characterized in that: The flatness tolerance of each of the reference surfaces A1 and A2 is 0-0.02mm, and the coplanarity tolerance of the two reference surfaces A1 and A2 is 0-0.04mm.

6. The method for processing and manufacturing a large tension stretching machine pressure beam according to claim 5, characterized in that: The flatness tolerance of each of the reference surfaces B1 and B2 is 0-0.02mm, the coplanarity tolerance of the two reference surfaces B1 and B2 is 0-0.04mm, and the perpendicularity tolerance between the reference surfaces B1 and B2 and surface A is 0-0.05mm.

7. The method for processing and manufacturing a large tension stretching machine pressure beam according to claim 6, characterized in that: The flatness tolerance of each of the reference surfaces C1 and C2 is 0-0.02mm, the coplanarity tolerance of the two reference surfaces C1 and C2 is 0-0.04mm, and the parallelism tolerance between the reference surfaces C1 and C2 and surface A is 0-0.05mm.

8. The method for processing and manufacturing a large tension stretching machine pressure beam according to claim 7, characterized in that: The flatness tolerance of each of the reference surfaces D1 and D2 is 0-0.02mm, the coplanarity tolerance of the two reference surfaces D1 and D2 is 0-0.04mm, the perpendicularity tolerance of the reference surfaces D1 and D2 to surface A is 0-0.05mm, and the parallelism tolerance of the reference surfaces D1 and D2 to surface B is 0-0.05mm.

9. A method for processing and manufacturing a large tension stretching machine pressure beam according to claim 8, characterized in that: The correction tolerance range in step fifteen is ±0.05mm.

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