Tool clamp
By designing tooling fixtures with main and auxiliary supports, the problem of deformation of the outer ring part during impeller machining was solved, achieving high-precision impeller machining results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ROBERT BOSCH GMBH
- Filing Date
- 2025-04-24
- Publication Date
- 2026-05-12
AI Technical Summary
When machining impellers, existing tooling fixtures cause the material in the outer ring to gradually decrease as the flow channel is completed, leading to deformation of the weak parts and affecting machining accuracy and dimensional accuracy.
The tooling fixture design employs a main support and an auxiliary support. The main support clamps the central hub in the axial direction through a mandrel and mating parts, while the auxiliary support supports the outer ring part around the central hub through multiple top columns, providing stable and moderate support force to resist cutting forces and reduce deformation.
This improved the shape and dimensional accuracy of the impeller machining, reduced machining errors and vibrations, and ensured high-precision finished impeller parts.
Smart Images
Figure CN224223289U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of machine tool clamping fixtures, specifically to a tooling fixture, particularly a tooling fixture suitable for machining impeller-shaped parts. Background Technology
[0002] An impeller (such as one used in a hydrogen circulation pump for a fuel cell) comprises a central hub with a central bore and an outer ring portion with radially arranged channels or blades (adjacent channels spaced apart by blades) surrounding the central hub. The intermediate annular portion connecting the central hub and the outer ring portion may have a dimension that decreases significantly in the axial direction. When machining the impeller channels on a machine tool, the workpiece to be machined is first clamped and fixed to the machine tool, and then the channels are machined on the outer ring portion of the workpiece using a machine tool. Currently used fixtures hold the workpiece on the outer ring portion, applying a radially inward holding force. However, as some channels are machined, the remaining material on the outer ring portion gradually decreases, especially at the locations where channels are machined, where the remaining material on the base wall is very little (or the wall thickness is very small) (see reference). Figure 2 The base wall 25 at the flow channel 14). At this time, the huge holding force applied by the tooling fixture (and the huge cutting force of the machine tool) causes these weak parts to undergo complex and large deformation, resulting in unacceptable deviations or errors in the shape and size of the final machined impeller parts, forming defective or unqualified workpieces. Utility Model Content
[0003] The purpose of this application is to provide a new tooling fixture.
[0004] This application provides a tooling fixture including a main support and a mating member. The main support includes a mandrel having a central axis extending in an axial direction. The mandrel is configured to be inserted into a central hole of a workpiece and to connect to the mating member. The mating member is configured to press against a central hub of the workpiece defining the central hole when connected to the mandrel to secure the central hub between the mating member and the mandrel. The tooling fixture also includes an auxiliary support comprising a bracket body configured to be fitted onto the mandrel and a plurality of top posts extending from the bracket body and configured to abut against an outer ring portion supporting the workpiece. The plurality of top posts are radially arranged around the mandrel.
[0005] In one embodiment, the support body includes a base for positioning to a mandrel and a curved portion for supporting the plurality of top posts, the curved portion having a contour corresponding to and conforming to the outer ring portion of the workpiece.
[0006] In one embodiment, the main support includes a flange connected to the mandrel and having an increased outer contour dimension, and the base includes a positioning surface for abutting the flange.
[0007] In one embodiment, the support body includes opposing first and second surfaces, the positioning surface being a surface portion of the first surface recessed at the base, and the second surface including a surface portion corresponding to and conforming to the outer ring portion of the workpiece.
[0008] In one embodiment, the support body is a single piece, and / or the support body has a bowl-shaped profile.
[0009] In one embodiment, at least some of the plurality of top columns extending from the support body are adjustable in size.
[0010] In one embodiment, each of the plurality of top posts is disposed within a through hole formed on the support body and includes a head end that can extend from the through hole to abut against a workpiece.
[0011] In one embodiment, each of the plurality of push pins is movably disposed within a corresponding through hole and has a tail end received within the through hole, the tail end having an actuation hole for engaging a tool so that the corresponding push pin can be moved by the tool; or
[0012] Each of the plurality of top posts includes a first member fixed within a through hole, a second member including the head end, and a third member associated with the first and second members and capable of being actuated to move the second member relative to the first member.
[0013] In one embodiment, the plurality of top posts include a plurality of first top posts arranged radially around the mandrel and / or a plurality of second top posts arranged radially around the mandrel, wherein each first top post extends from the support body in an axial direction and each second top post extends from the support body at an angle relative to the axial direction.
[0014] In one embodiment, each second top post extends from the support body at an angle of 30 to 50 degrees relative to the axial direction.
[0015] In one embodiment, the plurality of top posts further includes a plurality of third top posts arranged radially around the mandrel, wherein each third top post extends from the support body in a radial direction.
[0016] In one embodiment, the mandrel includes a first section with an external thread having an internal thread for connecting the mating member, a second section for adapting to a center hole of the workpiece, and a third section for adapting to an auxiliary hole of the support body, the second and third sections defining a first shoulder for positioning the workpiece.
[0017] The tooling fixture of this application includes, on the one hand, a main support and mating parts for providing primary support to the workpiece, which are connected to fix the workpiece by clamping the central hub of the workpiece in the axial direction; on the other hand, it includes an auxiliary support, with multiple top posts of the auxiliary support surrounding the central hub of the workpiece and supporting the outer ring portion of the workpiece's flow channel to be machined. The advantages of the tooling fixture of this application are: the main support acts on the relatively rigid central hub of the workpiece (or finished part), and the central hub can withstand a sufficiently large clamping force. This large axial clamping force will not affect (cause or exacerbate) the deformation of the weak parts of the base wall generated during the machining of the flow channel in any way. Another advantage of the tooling fixture of this application is that: the auxiliary support acts on the part of the workpiece subjected to huge cutting forces. Compared with the huge clamping force of the main support, the support force provided by the auxiliary support is relatively much smaller. This smaller support force will also not increase or exacerbate, or even cause, the deformation of the weak parts of the workpiece's base wall. More importantly, the auxiliary support greatly reduces the vibration generated when the machine tool applies a huge cutting force on the cantilevered outer ring portion of the workpiece. Therefore, the provision of auxiliary support reduces machining errors and workpiece deformation caused by vibrations of the machine tool and workpiece during machining, improving the shape and dimensional accuracy of the finished workpiece, including, but not limited to, the coaxiality between the inner and outer peripheral walls of each flow channel in the outer ring of the impeller, and the flatness of the axial end face of the impeller, etc. Thus, the tooling fixture of this application achieves the effect of reducing workpiece deformation during machining, thereby improving the product accuracy of the workpiece. Attached Figure Description
[0018] Figure 1 This is a perspective view of the workpiece support portion of the tooling fixture according to the first embodiment of this application.
[0019] Figure 2 yes Figure 1 A longitudinal sectional view.
[0020] Figure 3 yes Figure 2 A magnified view of a portion of the image.
[0021] Figure 4 yes Figure 1 The front view.
[0022] Figure 5 This is a longitudinal sectional view of the workpiece support portion of the tooling fixture according to the second embodiment of this application. Detailed Implementation
[0023] This application relates to the field of machine tool fixtures for fixing workpieces used to machine impeller-shaped parts to a machine tool, and is particularly suitable for machining impellers and similar parts used in hydrogen circulation pumps.
[0024] refer to Figure 1 , 2 Figures 5 and 6 illustrate the machining of an impeller 10' using the tooling fixture of this application, showing the finished part after machining. This impeller 10' is characterized by a central hub 12 having a central bore 15, and an outer ring portion 18 having a plurality of flow channels 14 or a plurality of blades 16 radially arranged around the central hub 12 (adjacent flow channels 14 are spaced apart by radially extending blades 16). Optionally, the impeller 10' as illustrated also includes an intermediate portion 17 connecting the central hub 12 and the outer ring portion 18, which is significantly thinner than both. The direction in which the central axis X of the central bore 15 extends is referred to herein as the axial direction, and the axial dimension of the intermediate portion 17 is significantly smaller than the axial dimensions of the central hub 12 and the outer ring portion 18. In the outer ring portion 18, all flow channels 14 are open toward a first side (i.e., the first axial side) in the axial direction of the impeller 10' and are connected by a base wall 25 bulging toward the opposite second axial side of the impeller 10'. The tooling fixture of this application is used to clamp and fix the workpiece to the machine tool, and to perform the operation of machining the flow channel 14 in the outer ring portion 18 using the machine tool cutting tool. Therefore, the term "workpiece 10" in this document refers to the impeller 10' which does not yet have the flow channel 14 feature shown in the figure.
[0025] This application primarily relates to improvements to the structural components of a tooling fixture used for fixing or clamping a workpiece 10. These components mainly include a main support 110, a mating component 120 connected to or cooperating with the main support 110 to fix a central hub 12 of the workpiece 10, and an auxiliary support 130. The auxiliary support 130 mainly includes a bracket body 140 defining an auxiliary hole 145 and a plurality of top posts 150 supported by the bracket body 140.
[0026] Figure 1-4 A first embodiment of this application is shown, wherein Figure 1 and 4 These are the 3D stereoscopic view and the front view of these parts, respectively. Figure 2 This is a longitudinal sectional view. Figure 3 for Figure 2 A magnified view of a portion of the image. Figure 5 A second embodiment of this application is shown, which differs from... Figure 1-4 The first embodiment mainly focuses on the arrangement of the top column 150 of the auxiliary support 130. Therefore, apart from the description related to the arrangement of the top column 150, most of the descriptions in this document can be found elsewhere. Figure 1-5 Two implementation examples.
[0027] First, refer to Figure 2 (combination) Figure 5The main support 110 is generally in the form of a stepped shaft, defining a central axis X, with each shaft segment having a regular cylindrical outer surface. When the tooling fixture of this application is attached to a machine tool, the axial direction of the central axis X is perpendicular to the machine tool surface. The main support 110 may include a body 20 and a mandrel 30 extending from the body 20, the body 20 and the mandrel 30 being connected by a flange 35 with an increased outer contour or outer diameter. The mandrel 30 is configured to pass through the central hole 15 of the workpiece 10, or in other words, the workpiece 10 is fitted and fixed to the mandrel 30, and the body 20 is configured to be attached and fixed to the machine tool via any possible structure. The attachment of the body 20 to the machine tool is not the focus of this application and will not be described in detail herein. When the workpiece 10 is assembled onto the mandrel 30, the second axial side (base wall 25) of the workpiece 10 faces the flange 35 (i.e., faces the machine tool surface), while the machine tool tool is applied to the workpiece 10 from the first axial side and applies a machining / cutting force along the axial direction.
[0028] In the axial direction, from the free end of the mandrel 30 toward the flange 35 or the body 20, the mandrel 30 may sequentially include a first segment (or end segment) 32, a second segment 34, and a third segment 36 with progressively increasing outer diameters. The third segment 36 forms a shoulder 31 with the flange 35 and a shoulder 33 with the second segment 34.
[0029] The first segment 32 may include connection features for connecting the mating member 120. Specifically, the first segment 32 has external threads, and correspondingly, the mating member 120 includes a hole with internal threads. For example, the mating member 120 is a nut. However, this application does not limit the connection method between the first segment 32 and the mating member 120, and therefore does not limit the structure of the mating member 120, as long as the functions described in this application can be achieved.
[0030] The second segment 34 is configured to insert into the center hole 15 of the workpiece 10, preferably with an outer diameter equal to or slightly smaller than the inner diameter of the center hole 15, to provide radially outward support for the workpiece 10 within the center hole 15. This helps enhance the stability of the workpiece 10 and reduces the deformation that may occur in the cantilevered outer ring portion 18 during machining. The axial length of the second segment 34 can be less than the corresponding length of the center hub 12 of the workpiece 10 to ensure that it acts firmly on the center hub 12 of the workpiece 10 in the axial direction when the mating member 120 is connected to the mandrel 30, and firmly presses and fixes the workpiece 10 against the shoulder 33, thereby making the fixation of the workpiece 10 more secure. Preferably, the outer diameter of the first segment 32 can be smaller than that of the second segment 34 as shown in the figure to facilitate the installation of the workpiece 10; alternatively, the two can be equal. The figure also shows a gasket 21 disposed between the mating member 120 and the center hub 12 of the workpiece 10, which facilitates the firm pressing of the mating member 120 against the workpiece 10.
[0031] The outer diameter of the third segment 36 is designed to correspond to the auxiliary hole 145 of the auxiliary support 130, such that the support body 140 of the auxiliary support 130 and the plurality of top posts 150 supported thereon are arranged around the mandrel 30. The axial length of the third segment 36 is designed, or the relative positions (axial distances) of the shoulders 33 and 31 of the auxiliary support 130 and the workpiece 10 are respectively designed to abut or position the workpiece 10 and the auxiliary support 130, such that the support body 140 of the auxiliary support 130 does not contact the workpiece 10 or the support body 140 is spaced apart from the workpiece 10 in the axial direction. Although not shown in the figure, this application may also include fasteners connecting the support body 140 of the auxiliary support 130 to the flange 35.
[0032] The tooling fixture of this application employs a structure in which the central hub 12 of the workpiece 10 is clamped between the main support (specifically, a mandrel) and the mating parts in the axial direction. The relatively rigid central hub 12 can withstand a sufficiently large clamping force in the axial direction, and this clamping force will not affect (e.g., cause or aggravate) the deformation of the workpiece at the machining part (cantilevered outer ring portion 18) during machining in any way. Therefore, compared with the tooling fixture clamping the workpiece 10 to the outer ring portion 18 with a radially inward clamping force, it has the significant advantages of reducing the deformation of the corresponding part and improving dimensional accuracy.
[0033] The auxiliary support 130 of the tooling fixture is configured to provide auxiliary support for the cantilevered outer ring portion 18 of the workpiece 10, which will be subjected to huge machining forces.
[0034] The support body 140 of the auxiliary support 130 can be constructed as a bowl-shaped structure as shown in the figure, generally including a base 142 for positioning to the mandrel 30 and a curved portion 144 that generally corresponds to the outer ring portion 18 of the workpiece 10 and conforms to the contour of the outer ring portion 18. The annular portion of the support body 140 corresponding to the middle portion 17 of the workpiece 10 can conform to its contour (e.g., ...). Figure 2 ), but this is not mandatory (e.g. Figure 5In the second embodiment, the base 142 is generally flat. The support body 140 may have opposing first surfaces 141 and second surfaces 143. The first surface 141 is a convex outer surface defining a bowl-shaped outer contour and includes a planar portion 147 on the base 142 for engaging the shoulder 31 to position the auxiliary support 130. The planar portion 147 may be, but is not necessarily, a planar portion recessed from the first surface 141 as illustrated. The second surface 143 is preferably configured to generally, but not necessarily strictly, conform to the outer contour or surface 11 of the second axial side of the workpiece 10, but as mentioned above, the second surface 143 does not contact, but is spaced apart from the surface 11 of the workpiece 10 by a certain gap. In some embodiments, the gap between the second surface 143 of the support body 140 and the opposing surface 11 of the workpiece 10 may be a few millimeters, for example, between 2 and 8 millimeters. Preferably, the second surface 143 conforms well to the contour of its surface 11 at least in the portion of the outer ring portion 18 corresponding to the workpiece 10 with a predetermined gap, so that the top post 150 supported by it better abuts against the main part to be processed (outer ring portion 18) of the workpiece 10.
[0035] This application provides two embodiments of the arrangement of multiple top columns 150 of the auxiliary support 130.
[0036] exist Figure 1-4 In the first embodiment, the top posts 150 of the auxiliary support 130 include a plurality of first top posts 150a arranged radially around the mandrel 30 and a plurality of second top posts 150b arranged radially around the mandrel 30. Each first top post 150a extends axially to abut against the workpiece 10, applying an axially upward (opposite to the cutting force of the machine tool) supporting force to the workpiece 10; each second top post 150b extends radially perpendicular to the axial direction to abut against the workpiece 10, applying a radially inward supporting force to the workpiece 10. The first top posts 150a and the second top posts 150b may have identical structures, and their numbers may be the same or different. The arrangement of the first top posts 150a and the second top posts 150a in the circumferential direction may be staggered. Optionally, each of the first top posts 150a and / or the second top posts 150a is arranged to support a position on the surface 11 corresponding to the flow channel 14, in order to help resist the cutting force on the workpiece 10 and reduce possible deformation. Alternatively, each of the first top post 150a and / or the second top post 150a may be arranged to support a position on the surface 11 corresponding to the blade 16. The description of the top post 150 herein applies to both the first and second top posts 150a and 150b, except for the arrangement (specifically the direction of extension).
[0037] Figure 5 This is a second embodiment of the arrangement of the top column 150 of the auxiliary support 130. Figure 5This is a simplified schematic diagram (only workpiece 10 is cut open), illustrating only the schematic positions and arrangement of each top post 150. Multiple top posts 150 of the auxiliary support 130 are arranged radially around the mandrel 30, and each extends at an angle relative to the axial direction, applying an inclined supporting force to the workpiece. It is conceivable that, preferably, the supporting force exerted by each top post 150 on the workpiece 10 is directed towards the surface 11 of the workpiece 10 at the center of the support / contact area, or has an angle relative to the axial direction that is a preset value or within a preset range. In some embodiments, the angle between the extending direction of the top post 150 and the axial direction is in the range of 30 degrees to 50 degrees.
[0038] For the auxiliary support 130 of the tooling fixture of this application, a plurality of support holes 155 are formed on its support body 140, such as through holes penetrating the support body 140. Each support hole 155 corresponds to or accommodates a top post 150, and each top post extends from the corresponding support hole 155 of the support body 140 to abut against the surface 11 of the workpiece 10.
[0039] As a preferred example, all top posts 150 can be configured to be telescopic, allowing their extension distance from the support body 140 to be adjustable. This is for example, to accommodate differences in the clearance between the second surface 143 of the support body 140 and the workpiece 10 at different top posts 150, or to adjust the supporting force exerted by the top posts 150 on the workpiece 10. Each top post 150 is movable between an extended position extending from the support hole 155 of the support body 140 to abut against the workpiece 10 and a retracted position to disengage from the workpiece 10.
[0040] The extension and retraction of the top column 150 can be actuated or achieved in any possible manner. For example, in the first embodiment, reference... Figure 2 and 3 The top post 150 movably engages with the support hole 155, for example, by being threaded into the support hole 155. The top post 150 has a head end 151 for separable contact with the workpiece 10 and a opposite tail end 153, the tail end 153 being accommodating within the support hole 155 and having a threaded actuation hole 157. An operator uses a tool (not shown) to engage the actuation hole 157 to actuate the top post 150, causing it to move forward or backward within the support hole 155, correspondingly extending or retracting the head end 151. Of course, this application is not limited to this specific manner, and any automatic or manual actuation method capable of achieving the same function is within the scope of protection of this application. As an example, in an alternative embodiment, the top post 150 may include a first member fixed within the support hole 155, a second member including the head end 151, and a third member associated with the first and second members and capable of being actuated to move the second member relative to the first member.
[0041] Preferably, the movement or extension of the pushers 150 can be controlled to control the contact / abutment force exerted by the head end 151 of each pusher 150 on the workpiece 10. For example, the force exerted by each pusher can be kept within a predetermined range or substantially consistent, or the support force of some of the pushers can be adaptively adjusted according to changes in machining position / machining force. For example, in a first embodiment, each first pusher 150a is controlled to exert a greater (vertically upward) abutment force on the workpiece 10 compared to the (radially inward) abutment force of each second pusher 150b on the workpiece 10, to resist the cutting force applied to the workpiece 10 by the machine tool. In some embodiments, the head end 151 of each pusher 150 may have a flexible or elastic material portion to avoid damaging the outer surface 11 of the workpiece 10. Here, the flexible or elastic material portion can be a pusher 150 attached to a rigid material in any way, or simply sandwiched between the head end 151 of the pusher 150 and the workpiece 10 as a separate pad.
[0042] It should also be understood that while all top posts 150 in the illustrated embodiments are configured to be retractable or adjustable, this is not mandatory. In some embodiments, certain top posts 150 may be designed to be non-retractable or non-adjustable.
[0043] The tooling fixture of this application, for example, uses an interconnected main support 110 and mating member 120 to clamp the center hub 12 of the workpiece in the axial direction, providing a clamping force sufficient to clamp and fix the workpiece 10 to the machine tool. The clamping force borne by the center hub 12 in the axial direction does not affect (e.g., cause or aggravate) the deformation of the outer ring portion 18 of the workpiece 10, including the flow channel 14, in any way. The tooling fixture of this application, through auxiliary support and by using top posts arranged radially around the mandrel to abut against the outer ring portion 18 of the workpiece 10, provides support against cutting forces from the tool and reduces vibrations on the machine tool and workpiece 10 during machining. This is beneficial for reducing workpiece deformation and improving machining accuracy. In particular, each top post can be designed to make the force acting on the workpiece 10 adjustable, so as to adjust the support force of each top post on the workpiece 10 according to the progress of the machining process. For example, in an embodiment that includes both a first top post 150a providing axial support to the workpiece 10 and a second top post 150b providing radial support to the workpiece 10, the abutting force of each first top post 150a can be designed to be relatively large to help resist the huge cutting force of the machine tool, while the abutting force of each second top post 150b can be designed to be smaller so as not to cause substantial deformation to the flow channel 14 portion of the base wall 25. This is very advantageous for machining impeller-type parts with large cutting forces.
[0044] Although the principles of this application have been described in detail above with respect to the first and second embodiments, some modifications can be made to the details to achieve the above-described functions. Some possible examples of modifications are listed here: the cross-sectional shape of the main support 110 (especially some of its shaft segments) does not necessarily have to be circular; the main support 110 does not necessarily have to be a single piece; the connection between the mating part 120 and the main support 100 does not necessarily have to be a threaded connection; the mating part 120 does not necessarily have to be a nut; the surface 143 of the support body 140 of the auxiliary support 130 facing the workpiece 10, in the portion corresponding to the middle portion 17 of the impeller, can be designed to conform to the surface shape of the workpiece 10 (first embodiment), or not conform to the surface shape of the workpiece 10 (e.g., ...). Figure 5 (Second embodiment); The arrangement of the top column 150 in the first and second embodiments can exist in the same tooling fixture embodiment, that is, including the first top column 150a and the second top column 150b of the first embodiment and the top column 150 of the second embodiment, or it can only include the second top column 150b of the first embodiment and the top column 150 of the second embodiment; or it can only include the first top column 150a of the first embodiment; When the auxiliary support that abuts against the workpiece 10 can be realized, the arrangement of the top column 150 can be modified according to actual needs to be different from any of the embodiments shown in the figure; The thickness of the bent portion 144 of the support body 140 of the auxiliary support 130 corresponding to the outer ring portion 18 of the workpiece 10 does not have to be greater than (as shown in the figure) the thickness of other portions; The support body 140 of the auxiliary support 130 does not have to be the bowl-shaped profile shown in the figure, or in other words, this application does not limit the shape of the first surface 141 of the support body 140 away from the workpiece 10.
[0045] Please note that the description of the embodiments shown in the figures herein is for illustrative and descriptive purposes only and is not intended to limit the scope of this disclosure. Various modifications or variations may be made to the details shown in the figures and described above while still fulfilling the functions described herein, and such modifications and variations are also considered to fall within the scope of this disclosure. The scope of protection of this application is defined only by the claims.
Claims
1. A tooling fixture comprising a main support (110) and a mating member (120), the main support (110) including a mandrel (30) having a central axis extending in an axial direction, the mandrel being configured for insertion into a central hole of a workpiece and for connecting the mating member, the mating member (120) being configured to press against a central hub (12) of the workpiece (10) defining the central hole when connected to the mandrel (30) to secure the central hub between the mating member (120) and the mandrel (30), characterized in that, The tooling fixture also includes an auxiliary support (130), which includes a bracket body (140) configured to be fitted onto the mandrel (30) and a plurality of top posts (150) extending from the bracket body (140) and configured to abut against an outer ring portion (18) supporting the workpiece (10), the plurality of top posts (150) being arranged radially around the mandrel (30).
2. The tooling fixture according to claim 1, characterized in that, The support body (140) includes a base (142) for positioning to the mandrel (30) and a curved portion (144) for supporting the plurality of top posts (150), the curved portion having a contour corresponding to and conforming to the outer ring portion (18) of the workpiece (10).
3. The tooling fixture according to claim 2, characterized in that, The main support (110) includes a flange (35) connected to the mandrel (30) and having an increased outer contour dimension, and the base (142) includes a positioning surface for abutting the flange (35).
4. The tooling fixture according to claim 3, characterized in that, The support body (140) includes a first surface (141) and a second surface (143) opposite to each other, the positioning surface being a surface portion (147) of the first surface (141) recessed at the base (142), and the second surface (143) including a surface portion corresponding to and conforming to the outer ring portion (18) of the workpiece (10).
5. The tooling fixture according to claim 4, characterized in that, The support body (140) is a single piece, and / or the support body (140) has a bowl-shaped profile.
6. The tooling fixture according to any one of claims 1-5, characterized in that, At least some of the plurality of top posts (150) extending from the support body (140) are adjustable in size.
7. The tooling fixture according to claim 6, characterized in that, Each of the plurality of top posts (150) is disposed within a through hole (155) formed on the support body (140) and includes a head end (151) that can extend from the through hole (155) to abut against the workpiece (10).
8. The tooling fixture according to claim 7, characterized in that, Each of the plurality of top posts (150) is movably disposed within a corresponding through hole (155) and has a tail end (153) received within the through hole (155), the tail end having an actuation hole (157) for engaging a tool so that the corresponding top post can be moved by the tool; or Each of the plurality of top posts (150) includes a first member fixed within a through hole (155), a second member including the head end (151), and a third member associated with the first and second members and capable of being actuated to move the second member relative to the first member.
9. The tooling fixture according to claim 6, characterized in that, The plurality of top posts (150) include a plurality of first top posts arranged radially around the mandrel (30) and / or a plurality of second top posts arranged radially around the mandrel (30), wherein each first top post extends from the support body in the axial direction and each second top post extends from the support body at an angle relative to the axial direction.
10. The tooling fixture according to claim 9, characterized in that, Each second top post extends from the support body at an angle of 30 to 50 degrees relative to the axial direction.
11. The tooling fixture according to claim 9, characterized in that, The plurality of top posts (150) also include a plurality of third top posts arranged radially around the mandrel (30), wherein each third top post extends from the support body in the radial direction.
12. The tooling fixture according to any one of claims 1-5 and 7-11, characterized in that, The mandrel (30) includes a first section (32) with an external thread having an internal thread for connecting the mating part (120), a second section (34) for fitting a central hole of the workpiece, and a third section (36) for fitting an auxiliary hole (145) of the support body (140), the second section (34) and the third section (36) defining a first shoulder (33) for positioning the workpiece (10).