A tool for extra-large and heavy workpieces and a processing technology for extra-large and heavy workpieces

Abstract

The present invention relates to the technical field of processing super-large and heavy gear rings, and specifically to a tooling for super-large and heavy workpieces and a processing technology for super-large and heavy workpieces. A tooling for super-large and heavy workpieces comprises a workbench, the workbench has a work surface, the workbench is used to carry the super-large and heavy workpiece, a sling is arranged on the workbench, the sling comprises a central axis, the central axis is assembled on the workbench perpendicularly to the work surface, a plurality of cables are assembled on the end of the central axis away from the workbench, and the free ends of the cables are connected to the super-large and heavy workpiece. A processing technology for super-large and heavy workpieces, using the above-mentioned tooling, comprises the following steps: assembling the super-large and heavy workpiece on the tooling, and processing the super-large and heavy workpiece with a processing device. The technical problem that the workbench in the prior art cannot directly carry the super-large gear ring, and after adding the expansion tooling, the expansion tooling is easily subjected to large forces and plastic deformation and plane distortion occur.

Description

Technical Field

[0001] The invention relates to the technical field of super-large and heavy gear ring processing, and in particular to a tooling for a super-large and heavy workpiece and a processing technology for the super-large and heavy workpiece. Background Art

[0002] Super-large heavy gear rings refer to gear rings with a diameter of more than 5 meters and a weight of 50T-100T. They are the main components of rotary kilns, ball mills, etc. The installation conditions of such products are complex and require large-scale lifting and transportation equipment, which has high installation and transportation costs. Due to the large volume and mass, if the on-site commissioning is unqualified, huge rework costs will be incurred, and the production schedule will be seriously affected. In order to avoid such problems, the processing accuracy of super-large gear rings must be confirmed at the product processing site, and the results of on-site commissioning must be accurately simulated.

[0003] like Figure 1 As shown, when a large gear grinding machine is processing an extra-large gear ring, due to the limited diameter of the expanded worktable (the expanded worktable is 4.7 meters, and a larger worktable will greatly increase the load of the machine tool), additional layers of expansion tooling such as horse legs need to be stacked. However, due to the rigidity limitations of the expanded worktable and the expanded tooling 4', when the workpiece 5' is placed on the expanded worktable 3', the end face position of the expanded worktable 3' will sink by at least about 1 to 2 mm, resulting in poor grinding alignment accuracy and processing stability. If the rigidity of the expanded tooling 4' is increased, the size of the expanded tooling must be increased, and the weight of the expanded tooling will inevitably increase significantly, while the overall load-bearing capacity of the worktable is limited, which will inevitably lead to a significant reduction in the weight of the workpiece that can be tolerated. Summary of the invention

[0004] In order to solve the technical problem that the workbench in the prior art cannot directly carry the super-large gear ring, and after adding the expansion tooling, the expansion tooling is easily subjected to large forces and plastic deformation and plane distortion occur, the present invention proposes a tooling for super-large and heavy workpieces and a processing technology for super-large and heavy workpieces, which solves the above technical problems. The technical solution of the present invention is as follows:

[0005] A tool for extra-large and heavy workpieces, comprising a workbench having a work surface, the workbench being used to carry the extra-large and heavy workpieces, the workbench being provided with a sling, the sling comprising a central axis, the central axis being mounted on the workbench perpendicularly to the work surface, a plurality of cables being mounted on one end of the central axis away from the workbench, the free ends of the cables being used to pull the extra-large and heavy workpiece.

[0006] The tooling for oversized and heavy workpieces of the present application arranges a sling on a workbench, and the sling includes a central axis and a cable. A portion of the weight of the oversized and heavy workpiece is shared by the sling structure to ensure that when an expansion tooling is added to the workbench, the weight of the oversized and heavy workpiece will not fall entirely on the expansion tooling. In this way, the expansion tooling is subjected to less force, is less prone to plastic deformation and plane distortion, and has a long service life.

[0007] According to one embodiment of the present invention, the central shaft is arranged in a split body, and the central shaft includes at least two sub-shafts connected in sequence along the axial direction. A plurality of the cables are evenly assembled along the circumferential direction on the end sub-shaft farthest from the workbench, and the end sub-shaft is detachably connected to the adjacent sub-shaft.

[0008] According to one embodiment of the present invention, the end of the terminal sub-shaft away from the workbench is a mounting end, a plurality of the cables are assembled on the mounting end, and the mounting end is slewingly supported.

[0009] According to one embodiment of the present invention, one end of the cable is hinged to the central axis, and the other end of the cable is connected to the oversized heavy workpiece through a lifting chain or a hook.

[0010] According to one embodiment of the present invention, the cable is a telescopic cable, and the cable includes at least two sub-cables connected in sequence, and two adjacent sub-cables are connected by a connecting tube, and an internal thread is provided in the connecting tube. The end of each sub-cable connected to the adjacent sub-cable is rod-shaped and provided with an external thread, and the ends of the two adjacent sub-cables extend into the interior of the connecting tube and cooperate with the connecting tube thread.

[0011] According to an embodiment of the present invention, the internal thread of the connecting cylinder is divided into two sections and the rotation directions are opposite. When the connecting cylinder is rotated, two adjacent sub-cables move towards or away from each other.

[0012] According to one embodiment of the present invention, an expansion structure is provided on the workbench to support the oversized and heavy workpiece.

[0013] A processing technology for an extra-large and heavy workpiece adopts the above-mentioned tooling and comprises the following steps: assembling the extra-large and heavy workpiece on the tooling and using a processing device to process the extra-large and heavy workpiece.

[0014] According to one embodiment of the present invention, the workbench of the tooling is a rotary workbench, and during the processing, the rotary workbench drives the extra-large and heavy workpiece to rotate.

[0015] According to one embodiment of the present invention, the oversized heavy workpiece is a gear or a gear ring, a lightening hole is provided on the web of the oversized heavy workpiece to cooperate with the cable, and the processing device is a gear hobbing assembly.

[0016] Based on the above technical solution, the technical effects that can be achieved by the present invention are:

[0017] 1. The tooling for oversized and heavy workpieces of the present invention is provided with a sling on a workbench, the sling comprising a central axis and a cable, and a part of the weight of the oversized and heavy workpiece is shared by the sling structure, so that when an expansion tooling is added to the workbench, the weight of the oversized and heavy workpiece will not fall entirely on the expansion tooling, so that the expansion tooling is subjected to less force, and is not prone to plastic deformation and plane distortion, and has a long service life;

[0018] 2. The tooling for super-large and heavy workpieces of the present invention has a split central axis, including at least two sub-axes connected in sequence along the axial direction, and the cable is mounted on the terminal sub-axle, and the terminal sub-axle is detachably connected to the adjacent sub-axle, so that the terminal sub-axle can be replaced to adjust the height of the central axis, and the length of the cable on the terminal sub-axle can also be set with the length of the terminal sub-axle to adapt to super-large and heavy workpieces of different diameters, and the replacement operation is convenient and more economical; in addition, the installation end of the cable installed on the terminal sub-axle is slewingly supported, so that the cable angle can be adjusted when the cable is matched with the super-large and heavy workpiece, and it is not easy to be twisted, and the cable angle can be adjusted conveniently;

[0019] 3. The tooling for super-large and heavy workpieces of the present invention has one end of the cable hinged to the central axis, and the other end of the cable is connected to the super-large and heavy workpiece through a lifting chain or a hook, so as to facilitate the coordination between the sling and the super-large and heavy workpiece; the cable is a telescopic cable, and the cable is formed by at least two sections of sub-cables connected by a connecting tube, and by setting two adjacent sub-cables to cooperate with the connecting tube thread, the axial distance between the two adjacent sub-cables can be adjusted by rotating the connecting tube, thereby adjusting the length of the cable; the internal thread of the connecting tube is further set to two sections with opposite rotation directions, and when the connecting tube is rotated, the two adjacent sub-cables can move toward or away from each other to adjust the length of the cable, and the tension of the cable can also be adjusted; in addition, during this adjustment process, the rotation of the connecting tube will not drive the cable to rotate, which can effectively prevent the cable from twisting during the telescopic process;

[0020] 4. The processing technology of the oversized and heavy workpiece of the present invention is to assemble the oversized and heavy workpiece on the tooling, and then use the processing device to process the oversized and heavy workpiece, which can facilitate the processing of the outer peripheral surface of the oversized and heavy workpiece; the worktable is a rotary worktable, and the rotary worktable drives the oversized and heavy workpiece to rotate, and the processing device does not need to move around the oversized and heavy workpiece to process the oversized and heavy workpiece; the oversized and heavy workpiece is a gear or a gear ring, and a lightening hole is opened on its belly, which can reduce the weight of the oversized and heavy workpiece on the one hand, and facilitate the coordination with the cable of the sling on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a structural schematic diagram of a tooling used for super-large and heavy workpieces in the prior art;

[0022] Figure 2 This is a schematic structural diagram of a tooling for an oversized and heavy workpiece in the first embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of the structure of the cable;

[0024] Figure 4 It is a structural schematic diagram of the hook;

[0025] Figure 5 is a structural schematic diagram of the first expansion component;

[0026] Figure 6 for Figure 5 Bottom view of

[0027] Figure 7 is a cross-sectional view of the first expansion member;

[0028] Figure 8 is a structural schematic diagram of the second expansion component;

[0029] Fig. 9 for Figure 8 A top view of

[0030] Fig.10 This is a schematic structural diagram of a tooling for an oversized and heavy workpiece in the second embodiment of the present invention;

[0031] Fig.11 It is a schematic diagram of the structure of the cable in the third embodiment of the present invention;

[0032] Fig.12 for Fig.11 A cross-sectional view of

[0033] In the figure: 1-workbench; 2-lifting device; 21-central axis; 211-sub-axis; 212-terminal sub-axis; 2121-installation end; 2122-connecting lug; 2123-slewing bearing structure; 22-cable; 221-hinge; 222-sub-cable; 223-connecting cylinder; 2231-operating plane; 23-hook; 3-expanded workbench; 31-reinforcement plate; 4-expanded tooling; 41-first expansion piece; 42-second expansion piece; 5-extra-large and heavy workpiece; 3'-expanded workbench; 4'-expanded tooling; 5'-workpiece. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0037] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0038] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0039] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0040] Embodiment 1

[0041] like Figure 2-9 As shown, this embodiment provides a tooling for oversized and heavy workpieces, including a workbench 1, on which a sling 2 is also provided. When an extended workbench 3 and / or an extended tooling 4 is provided on the workbench 1 to carry an oversized and heavy workpiece 5, the sling 2 can pull and lift the oversized and heavy workpiece 5 to reduce the stress on the extended workbench 3 and the extended tooling 4, so as to prevent the extended workbench 3 and the extended tooling 4 from carrying the oversized and heavy workpiece 5 for a long time and causing plastic deformation and plane distortion.

[0042] The workbench 1 can be a rotary workbench. The workbench 1 has a work surface. The sling 2 is arranged on the work surface of the workbench 1. The sling 2 includes a center axis 21 and a cable 22. The center axis 21 is arranged perpendicular to the work surface of the workbench 1. The center axis 21 is fixedly installed on the workbench 1. One end of the cable 22 is assembled on the end of the center axis 21 away from the workbench 1. The other end of the cable 22 is a free end, which is used to pull and connect an extra-large heavy workpiece 5.

[0043] According to a preferred technical solution of this embodiment, the central shaft 21 can be divided into two parts, and the central shaft 21 includes at least two sub-shafts connected in sequence along the axial direction. The cable 22 is assembled on the end sub-shaft of the central shaft 21 that is farthest from the working surface, and the end sub-shaft is detachably connected to the adjacent sub-shaft. By setting the central shaft 21 in two parts, the end sub-shaft and the cable 22 thereon can be easily replaced. The end sub-shafts of different heights and the cables 22 of different lengths can adapt to oversized heavy workpieces 5 of different sizes. In this embodiment, the central shaft 21 is divided into two sections, namely the sub-shaft 211 and the end sub-shaft 212. One end of the sub-shaft 211 is fixed on the workbench 1, and the other end of the sub-shaft 211 is connected to one end of the end sub-shaft 212. The other end of the sub-shaft 212 is the assembly end 2121, and the assembly end 2121 is assembled with multiple cables 22. The cable 22 is optional but not limited to a pull rod.

[0044] The sub-shaft 211 and the terminal sub-shaft 212 can be connected via a flange, and there can be at least three cables 22, which are evenly distributed on the periphery of the terminal sub-shaft 212. Specifically, the periphery of the terminal sub-shaft 212 can be radially extended with a connecting structure, and both ends of the cable 22 are respectively provided with hinged parts 221, and the hinged part 221 at one end of the cable 22 is hingedly assembled on the connecting structure, and the hinged part 221 at the other end of the cable 22 is connected to the oversized heavy workpiece 5 through a hook 23. Figure 4 As shown, one end of the hook 23 is a hinged end for being hinged to the hinged portion 221 of the cable 22, and the other end is hook-shaped for hooking the oversized heavy workpiece 5. In addition to the hook 23 of the present application, a lifting chain can also be used to pull the oversized heavy workpiece 5. The sling 2 can be made of Q235, 20 steel material.

[0045] In order to carry the extra-large heavy workpiece 5, an expansion structure can also be set on the workbench 1 to adapt to the size of the extra-large heavy workpiece 5. The expansion structure includes an expansion workbench 3 and an expansion tool 4. The expansion workbench 3 is outward-expanding from bottom to top. The middle part of the expansion workbench 3 is a hollow structure to reduce weight and facilitate the central axis 21 to pass through. A reinforcing plate 31 is fixed to the top surface of the expansion workbench 3. The expansion tool 4 is assembled on the upper surface of the expansion workbench 3. The expansion tool 4 includes a first expansion piece 41 and a second expansion piece 42. The first expansion piece 41 is arranged close to the reinforcing plate 31, and the second expansion piece 42 is arranged on the first expansion piece 41. There are multiple first expansion pieces 41 and multiple second expansion pieces 42. The multiple first expansion pieces 41 and the multiple second expansion pieces 42 are evenly distributed in the circumferential direction. The first expansion piece 41 is outward-expanded relative to the expansion workbench 3, and the second expansion piece 42 is outward-expanded relative to the first expansion piece 41 to form an extra-large bearing surface to carry the extra-large heavy workpiece 5. Preferably, the first expansion piece 41 and the second expansion piece 42 may be a horse frame structure, and the first expansion piece 41 may be a hollow structure, which can greatly reduce the weight.

[0046] In this embodiment, the oversized heavy workpiece 5 is a gear or a gear ring, and the oversized heavy workpiece 5 includes a web. In order to facilitate the pulling and connecting of the oversized heavy workpiece 5 by the sling 2, a plurality of lightening holes are circumferentially arranged on the web of the oversized heavy workpiece 5. On the one hand, the weight of the oversized heavy workpiece 5 can be reduced, and on the other hand, it is convenient to cooperate with the cable 22 of the sling 2.

[0047] This embodiment also provides a processing technology for an oversized heavy workpiece, using the above-mentioned tooling, including the following steps: assembling the oversized heavy workpiece 5 on the tooling, and the processing device processes the oversized heavy workpiece 5. During the processing, the workbench 1 drives the oversized heavy workpiece 5 thereon to rotate, and the processing device can be a gear hobbing assembly, and the processing device performs gear hobbing on the outer periphery of the oversized heavy workpiece 5.

[0048] The tooling for extra-large and heavy workpieces and the processing technology for extra-large and heavy workpieces in this embodiment simplify the tooling structure to the maximum extent and reduce the overall weight. According to the design requirements, the bearing weight of a single cable is more than 6 tons. After calculation by finite element analysis software, the strength and rigidity of the sling structure can meet the requirements under a load of 70 tons.

[0049] The tooling for super-large and heavy workpieces and the processing technology for super-large and heavy workpieces of this embodiment are used for processing large gear parts by large gear grinding machines (eight-meter gear grinding machines), especially large gears with a diameter of more than 6 meters and heavy weight, and have the following advantages:

[0050] (1) Effectively avoid deformation of tooling and expansion workbench during use.

[0051] (2) Improve processing efficiency and gear grinding accuracy.

[0052] (3) Improve alignment accuracy and machine tool stability.

[0053] (4) Since the weight of the expansion tooling is reduced, the weight of the workpiece that the gear grinding machine can bear is indirectly increased, and the types and scope of gear processing are expanded.

[0054] (5) Reduce the additional tooling costs and deformation repair costs of the expanded workbench.

[0055] Embodiment 2

[0056] like Fig.10As shown, this embodiment is basically the same as the first embodiment, and the only difference is that a plurality of connecting lugs 2122 extend from the periphery of the assembly end 2121, and the terminal sub-shaft 212 is hinged to the hinge portion 221 of the cable 22 through the connecting lugs 2122; in addition, the assembly end 2121 is slewing supported. Specifically, a slewing support structure 2123 is provided below the assembly end 2121 of the terminal sub-shaft 212, and the assembly end 2121 can be rotated relative to the sub-shaft 211 through the slewing support structure 2123 to facilitate adjustment of the angle of the cable 22. The slewing support structure 2123 can be selected from but not limited to a slewing support bearing.

[0057] Embodiment 3

[0058] like Figure 11-12 As shown, this embodiment is basically the same as the first and second embodiments, except that the cable 22 is a telescopic cable. The cable 22 includes at least two sub-cables 222 connected in sequence, and two adjacent sub-cables 222 are connected by a connecting tube 223. The position of at least one sub-cable 222 relative to the connecting tube 223 is variable to achieve the change of the overall length of the cable 22.

[0059] Specifically, the end of each sub-cable 222 connected to the adjacent sub-cable 222 is rod-shaped and provided with an external thread, and the connection tube 223 is provided with an internal thread, and the ends of the two adjacent sub-cables 222 extend into the connection tube 223 and are threadedly matched with the connection tube 223. By rotating the connection tube 223 or the sub-cable 222, the relative position between the connection tube 223 and the sub-cable 222 can be changed to change the overall length of the cable 22. Preferably, the internal thread of the connection tube 223 is divided into two sections and the rotation direction is opposite, and the two sections of the internal thread with opposite rotation direction are respectively threadedly matched with the rod-shaped ends of the two adjacent sub-cables 222. Further preferably, an operating plane 2231 is formed on the outer peripheral surface of the connection tube 223 to facilitate the operator to use an operating tool to clamp the connection tube 223, and apply force to rotate the connection tube 223 to drive the adjacent sub-cables 222 to move axially toward or away from each other. In this embodiment, there are two sub-cables 222 , which are connected as a whole via a connecting tube 223 . The two sub-cables 222 may both be rod-shaped, and hinged portions 221 are respectively provided at the outer ends of the two sub-cables 222 that are far away from each other.

[0060] If the gear diameter range to be applied is 1 meter (such as 6-7 meters or 7-8 meters), the tooth width height is 400-750 mm, and the telescopic length of a single cable 22 can be designed to be 600 mm. The telescopic cable can also be easily adjusted to ensure that each cable 22 has the same load-bearing capacity.

[0061] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A tool for an extra-large and heavy workpiece, comprising a workbench (1), the workbench (1) having a work surface, the workbench (1) being used to carry an extra-large and heavy workpiece (5), characterized in that: The workbench (1) is provided with a sling (2), the sling (2) comprising a central axis (21), the central axis (21) being mounted on the workbench (1) perpendicularly to the work surface, a plurality of cables (22) being mounted on one end of the central axis (21) away from the workbench (1), the free ends of the cables (22) being connected to the oversized heavy workpiece (5); the central axis (21) being arranged in a split form, the central axis (21) comprising at least two sub-axes connected in sequence along the axial direction, the plurality of cables (22) being evenly mounted along the circumferential direction on an end sub-axle (212) farthest from the workbench (1), the end sub-axle (212) being detachably connected to an adjacent sub-axle (211); The workbench (1) is provided with an expansion structure for supporting the extra-large heavy workpiece (5).

2. A tooling for extra-large and heavy workpieces according to claim 1, characterized in that: The end of the terminal sub-shaft (212) away from the workbench (1) is a mounting end (2121), a plurality of the cables (22) are mounted on the mounting end (2121), and the mounting end (2121) is slewingly supported.

3. A tooling for extra-large and heavy workpieces according to claim 1, characterized in that: One end of the cable (22) is hinged to the central shaft (21), and the other end of the cable (22) is connected to the extra-large heavy workpiece (5) via a lifting chain or a lifting hook (23).

4. A tooling for extra-large and heavy workpieces according to any one of claims 1 to 3, characterized in that: The cable (22) is a telescopic cable, comprising at least two sub-cables (222) connected in sequence, two adjacent sub-cables (222) being connected via a connecting tube (223), an internal thread being provided in the connecting tube (223), an end portion of each sub-cable (222) connected to an adjacent sub-cable (222) being rod-shaped and provided with an external thread, and the ends of the two adjacent sub-cables (222) extending into the interior of the connecting tube (223) and being threadably matched with the connecting tube (223).

5. A tooling for extra-large and heavy workpieces according to claim 4, characterized in that: The internal thread of the connecting cylinder (223) is divided into two sections and has opposite rotation directions; when the connecting cylinder (223) is rotated, two adjacent sub-cables (222) move towards or away from each other.

6. A processing technology for super-large and heavy workpieces, characterized in that: The tooling according to any one of claims 1 to 5 comprises the following steps: assembling an extra-large heavy workpiece (5) on the tooling, and processing the extra-large heavy workpiece (5) with a processing device.

7. A process for processing an extra-large and heavy workpiece according to claim 6, characterized in that: The workbench (1) of the tooling is a rotary workbench, and during the processing, the rotary workbench drives the extra-large heavy workpiece (5) to rotate.

8. The processing technology for processing an extra-large heavy workpiece according to claim 7, characterized in that: The extra-large heavy workpiece (5) is a gear or a gear ring, a lightening hole is provided on the web of the extra-large heavy workpiece (5) to cooperate with the cable (22), and the processing device is a gear hobbing assembly.

Images