CN111421355A - Annular thin plate machining tool and fixing method - Google Patents
Annular thin plate machining tool and fixing method Download PDFInfo
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- CN111421355A CN111421355A CN202010237649.0A CN202010237649A CN111421355A CN 111421355 A CN111421355 A CN 111421355A CN 202010237649 A CN202010237649 A CN 202010237649A CN 111421355 A CN111421355 A CN 111421355A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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Abstract
The invention discloses a processing tool and a fixing method of an annular thin plate, wherein the processing tool comprises a bottom plate, a supporting block, a fixed supporting structure and an auxiliary supporting structure, wherein the supporting block is fixed with the bottom plate; the fixed supporting structure is fixed with the supporting block, and the workpiece is fixed with the fixed supporting structure; the auxiliary supporting structure comprises a clamping block, a supporting column, an expansion spring and a locking piece, the clamping block is fixed with the supporting block, a mounting groove is formed in the supporting block, the expansion spring is arranged in the mounting groove, one end of the supporting column is arranged in the mounting groove, the supporting column is connected with the mounting groove in a sliding mode, the other end of the supporting column penetrates through the clamping block, and the clamping block and the locking piece lock the supporting column. The invention provides a processing tool and a fixing method for an annular thin plate, which have the advantages that a large number of auxiliary supporting structures are adopted, the number of fixed supporting structures is reduced, the operation of positioning and supporting is simplified, the positioning accuracy is ensured, the supporting strength is ensured, the fixing efficiency is improved, and the like.
Description
Technical Field
The invention relates to the technical field of processing tools, in particular to a processing tool and a fixing method for an annular thin plate.
Background
The annular thin plate product has the characteristics of large diameter and thin thickness, and the phenomena of vibration and workpiece deformation are easily caused if a large number of auxiliary supports are not arranged during the vertical lathe processing. However, if the traditional screw and nut mode is used for fixing and supporting, the operation is very complicated due to too many screws, the processing efficiency is affected, and the positioning accuracy cannot be guaranteed. Therefore, it is urgently needed to design a processing tool and a fixing method for an annular thin plate, so that the number of fixing and supporting structures is reduced, the operation of positioning and supporting is simplified, and the fixing efficiency is improved.
Chinese patent application publication No. CN201970129U, published as 09.14.2011, entitled "a tool for processing annular sheet members", discloses a tool for processing annular sheet members, and is characterized in that: the novel screw-tightening nut comprises a core shaft and a screw-tightening nut, wherein a shaft shoulder is arranged on the core shaft, and threads matched with the screw-tightening nut are arranged on at least one side of the shaft shoulder. The utility model fixes the blank for processing the sheet between the side of the shaft shoulder of the mandrel and the lock nut, the mandrel can be fixed on the lathe to process the outer circular surface of the sheet, and the size of the blank in the thickness direction is equal to the size of the finished product because the clamping part is not required to be reserved, thereby solving the cost problems of wasting raw materials and processing the sheet thickness; after the excircle is machined to the size, the inner hole is machined by taking the excircle as a clamping and positioning surface, so that the coaxiality of the inner hole and the excircle surface is improved. However, the patent still has the above problems: because the number of the fixing screws is too large, the operation is very complicated, the processing efficiency is influenced, and the positioning precision cannot be ensured.
Disclosure of Invention
In order to overcome the problems that in the prior art, the fixing operation is complicated, the processing efficiency is influenced and the positioning precision cannot be guaranteed due to the fact that a large number of supports are needed for annular thin plate products, the annular thin plate processing tool is provided, a large number of auxiliary support structures are adopted, the number of the fixed support structures is reduced, the positioning and supporting operations are simplified, the positioning accuracy is guaranteed, the supporting strength is guaranteed, the fixing efficiency is improved, and the like.
The second object of the present invention is: the fixing method of the annular thin plate is relatively simple and convenient in clamping, can be used for rapidly clamping the workpiece, improves clamping efficiency, and is high in clamping precision.
In order to achieve the purpose, the invention adopts the following technical scheme:
a processing tool for an annular thin plate comprises a bottom plate, a supporting block, a fixed supporting structure and an auxiliary supporting structure, wherein the supporting block is fixed with the bottom plate; the fixed supporting structure is fixed with the supporting block, and the workpiece is fixed with the fixed supporting structure; the auxiliary supporting structure comprises a clamping block, a supporting column, an expansion spring and a locking piece, wherein the clamping block is fixed with the supporting block, a mounting groove is formed in the supporting block, the expansion spring is arranged in the mounting groove, one end of the expansion spring is connected with the supporting block, the other end of the expansion spring is connected with the supporting column, one end of the supporting column is arranged in the mounting groove, the supporting column is connected with the mounting groove in a sliding mode, the other end of the supporting column penetrates through the clamping block, and the clamping block and the locking piece.
Among the above-mentioned technical scheme, adopted a large amount of auxiliary stay structures, reduced the quantity of fixed stay structure, the operation of the location support of simplification has improved fixed efficiency. When the tool is used, the locking part on the auxiliary supporting structure is firstly opened, the supporting column is pressed downwards, the height of the supporting column is reduced, and then the locking part is locked, so that the supporting column cannot bounce; then, placing the workpiece on a tool, aligning the corresponding position of the workpiece with a fixed supporting structure and fixing the workpiece through a bolt; and finally, the locking part is opened, so that the top end of the supporting column is locked after contacting with the workpiece, the supporting column is clamped by the clamping block, and the supporting column can resist the axial force during processing.
Preferably, the locking part comprises a clamping bolt and a clamping nut, the clamping block is provided with a locking hole and a locking groove which are communicated with each other, the supporting column penetrates through the locking hole and is matched with the locking hole, one end of the clamping bolt penetrates through the locking groove, and the clamping bolt and the clamping nut clamp the clamping block. The structure clamps the clamping block through the clamping bolt and the clamping nut to enable the locking hole to shrink, and the clamping effect on the clamping block can be achieved.
Preferably, the locking part comprises a clamping bolt, the clamping block is provided with a locking hole and a locking groove which are communicated, the supporting column penetrates through the locking hole and is matched with the locking hole, and one end of the clamping bolt penetrates through one side wall of the locking groove and is in threaded connection with the other side wall of the locking groove. The structure clamps the clamp block through the clamping bolt to enable the locking hole to shrink, and the clamping effect on the clamp block can be achieved.
Preferably, the locking part comprises a set screw, a locking hole communicated with the clamping block is formed in the clamping block, the supporting column penetrates through the locking hole and is matched with the locking hole, the set screw is in threaded connection with the clamping block, and one end of the set screw penetrates through the clamping block and compresses the supporting column. The structure is tightly propped against the supporting column through the set screw, so that the supporting column can be fixed.
Preferably, the number of the fixed support structures is 3, and the 3 fixed support structures are distributed circumferentially. For plane support, three-point positioning can be implemented to accurately position and avoid over-positioning, and after the 3 fixed supporting structures fix and position the workpiece, the auxiliary supporting structure provides a supporting function, so that the accurate positioning is ensured, the supporting strength is ensured, the supporting operation is simplified, and the mounting efficiency is improved.
Preferably, the fixed support structures are disposed on opposite outer sides of the base plate and the auxiliary support structures are disposed on opposite inner sides of the base plate. The fixed supporting structure has a positioning function, and the positioning accuracy can be improved by arranging the fixed supporting structure at the opposite outer side of the bottom plate.
Preferably, the fixed supporting structure comprises a fixed column and a fixed screw, a positioning column matched with the workpiece is arranged at the upper end of the fixed column, the lower end of the fixed column is in contact with the supporting block, and the fixed screw sequentially penetrates through the supporting block, the fixed column and the positioning column from the lower part of the supporting block and is in threaded connection with the workpiece. The positioning column is matched with the positioning hole in the workpiece to provide a positioning effect, and after the positioning column and the workpiece are positioned, the workpiece and the fixed supporting structure are fixed from the lower part through the fixing screw, so that the interference in machining is avoided.
Preferably, the floating support structure comprises a floating connecting piece and a floating bolt, the upper end of the floating connecting piece is in threaded connection with the workpiece, the lower end of the floating connecting piece is in contact with the supporting block, and one end of the floating bolt penetrates through the supporting block and is in threaded connection with the floating connecting piece. The floating support structure can provide a support effect, the support strength is increased, meanwhile, the workpiece is not positioned, and the over-positioning can be avoided. After the workpiece is fixed and positioned by the fixed supporting structure, the floating supporting structure provides a supporting effect, so that the positioning can be avoided, the positioning accuracy is ensured, and meanwhile, each supporting point can be in contact with the workpiece, and the supporting strength is ensured. When the floating support structure is used, the upper end of the floating connecting piece is connected with a threaded hole on a workpiece and is screwed to the bottom; when the workpiece is placed on the tool, the floating connecting piece is not contacted with the supporting block; and after the fixed supporting structure is fixed, the floating connecting piece is screwed out, so that the bottom of the floating connecting piece is contacted with the supporting block, and the floating bolt penetrates through the supporting block and is fixed with the floating connecting piece.
Preferably, the floating support structures are circumferentially distributed. The structure can ensure that all circumferential points of the workpiece are uniformly supported, and the fixing stability is ensured.
Preferably, a distribution circle of the floating support structure in the circumferential direction coincides with a distribution circle of the fixed support structure in the circumferential direction. The floating support structure may provide additional support to the outer ring of the workpiece.
Preferably, the positioning structure comprises a positioning dowel pin and a bottom plate, and the top end of the positioning dowel pin is provided with a positioning pin shaft matched with the workpiece. The positioning dowel pin can provide positioning function before installation and fixation.
The fixing method of the annular thin plate adopts the processing tool of the annular thin plate, and comprises the following steps:
a. preparing auxiliary support: the locking piece is opened, and the locking piece is locked after the supporting column is pressed downwards;
c. fixing and supporting: placing a workpiece on a tool, aligning the corresponding position of the workpiece with the fixed supporting structure and fixing;
e. auxiliary supporting: and opening the locking piece, and locking the locking piece after the top end of the support column contacts the workpiece.
Through implementing above-mentioned technical scheme, can make work piece processing occasionally a large amount of auxiliary stay, the clamping precision is high, and the clamping is simple convenient relatively, can improve clamping efficiency. The auxiliary supporting structure supports after the fixed supporting structure is fixed, so that over-positioning can be avoided, and meanwhile, each supporting point can be ensured to be in contact with a workpiece.
Preferably, the method also comprises a step b and a step d, wherein the step b is arranged between the step a and the step c, and the step d is arranged between the step c and the step e
b. Preparing a floating support: connecting the upper end of the floating connecting piece with a threaded hole on a workpiece and screwing the floating connecting piece to the bottom;
d. floating and supporting: and screwing out the floating connecting piece to enable the bottom of the floating connecting piece to be in contact with the supporting block, and then, penetrating the floating bolt through the supporting block to be fixed with the floating connecting piece.
Through implementing above-mentioned technical scheme, floating support structure can provide the supporting role, increases support intensity, does not have the location to the work piece simultaneously, can avoid the overspun. After the workpiece is fixed and positioned by the fixed supporting structure, the floating supporting structure provides a supporting effect, so that the positioning can be avoided, the positioning accuracy is ensured, and meanwhile, each supporting point can be in contact with the workpiece, and the supporting strength is ensured.
The invention has the beneficial effects that: (1) a large number of auxiliary supporting structures are adopted, the number of the fixed supporting structures is reduced, the operation of positioning support is simplified, and the fixing efficiency is improved. (2) After the fixed supporting structure fixes and positions the workpiece, the auxiliary supporting structure and the floating supporting structure provide a supporting effect, so that the positioning accuracy is ensured, and the supporting strength is also ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a portion of the present invention;
FIG. 3 is a schematic structural view of a floating support structure of the present invention;
FIG. 4 is a schematic structural view of example 2;
FIG. 5 is a schematic structural view of example 3.
In the figure: the device comprises a bottom plate 1, a supporting block 2, a mounting groove 2.1, a fixed supporting structure 3, a fixed column 3.1, a positioning column 3.2, a fixing screw 3.3, an auxiliary supporting structure 4, a clamping block 4.1, a locking hole 4.1.1, a locking groove 4.1.2, a supporting column 4.2, a telescopic spring 4.3, a locking piece 4.4, a clamping bolt 4.4.1, a clamping nut 4.2, a fastening screw 4.4.3, a floating supporting structure 5, a floating connecting piece 5.1, a floating bolt 5.2, a positioning structure 6, a positioning dowel 6.1 and a positioning pin 6.2.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Example 1:
as shown in fig. 1, the processing tool for the annular thin plate comprises a bottom plate 1, supporting blocks 2, fixed supporting structures 3, auxiliary supporting structures 4, floating supporting structures 5 and a positioning structure 6, wherein the supporting blocks 2 are fixed with the bottom plate 1, the number of the fixed supporting structures 3 is 3, and the 3 fixed supporting structures 3 are circumferentially and uniformly distributed along the axis of the bottom plate 1. The fixed support structures 3 are arranged on the opposite outer sides of the base plate 1, and the auxiliary support structures 4 are arranged on the opposite inner sides of the base plate 1; the floating support structures 5 are circumferentially distributed along the axis of the bottom plate 1, and the circumferential distribution circle of the floating support structures 5 is superposed with the circumferential distribution circle of the fixed support structures 3.
As shown in fig. 1 and 2, the fixed support structure 3 is fixed with the support block 2, and the workpiece is fixed with the fixed support structure 3; the fixed supporting structure 3 comprises a fixed column 3.1 and a fixed screw 3.3, a positioning column 3.2 matched with the workpiece is arranged at the upper end of the fixed column 3.1, the lower end of the fixed column 3.1 is in contact with the supporting block 2, and the fixed screw 3.3 sequentially penetrates through the supporting block 2, the fixed column 3.1 and the positioning column 3.2 from the lower part of the supporting block 2 and is in threaded connection with the workpiece.
As shown in fig. 1 and 2, the auxiliary supporting structure 4 includes a clamping block 4.1, a supporting column 4.2 and a telescopic spring 4.3, a locking member 4.4, the clamping block 4.1 and the supporting block 2 provide bolt fastening, the supporting block 2 is provided with a mounting groove 2.1, the telescopic spring 4.3 is arranged in the mounting groove 2.1, one end of the telescopic spring 4.3 is connected with the supporting block 2, the other end of the telescopic spring 4.3 is connected with the supporting column 4.2, one end of the supporting column 4.2 is arranged in the mounting groove 2.1, the supporting column 4.2 is slidably connected with the mounting groove 2.1, the other end of the supporting column 4.2 passes through the clamping block 4.1, and the clamping block 4.1 and the locking member 4.4.2 lock the supporting column 4. Retaining member 4.4 is equipped with the locking hole 4.1.1 and the locking groove 4.1.2 of intercommunication each other on the clamp splice 4.1 including clamping bolt 4.4.1 and clamping nut 4.4.2, support column 4.2 pass locking hole 4.1.1 and with locking hole 4.1.1 adaptation, clamping bolt 4.4.1's one end passes locking groove 4.1.2, clamping bolt 4.4.1 and clamping nut 4.4.2 clamp splice 4.1. Be equipped with the stair structure on support column 4.2, avoid the support column roll-off.
As shown in fig. 3, the floating support structure 5 includes a floating connection member 5.1 and a floating bolt 5.2, the upper end of the floating connection member 5.1 is in threaded connection with the workpiece, the lower end of the floating connection member 5.1 is in contact with the support block 2, and one end of the floating bolt 5.2 penetrates through the support block 2 and is in threaded connection with the lower end of the floating connection member 5.1.
Among the above-mentioned technical scheme, adopted a large amount of auxiliary stay structures 4, reduced the quantity of fixed stay structure 3, the operation of the location support of simplification has improved fixed efficiency. When the tool is used, the locking part 4.4 on the auxiliary supporting structure 4 is firstly opened, the supporting column 4.2 is pressed downwards, the height of the supporting column 4.2 is reduced, and then the locking part 4.4 is locked, so that the supporting column 4.2 cannot be bounced; then the upper end of the floating connecting piece is connected with a threaded hole on the workpiece and is screwed to the bottom; placing the workpiece on the tool, wherein the floating connecting piece is not in contact with the supporting block; aligning the corresponding position of the workpiece to the fixed supporting structure 3 and fixing the workpiece through a bolt; after the fixed supporting structure is fixed, the floating connecting piece is screwed out, so that the bottom of the floating connecting piece is contacted with the supporting block, and then the floating bolt penetrates through the supporting block and is fixed with the floating connecting piece; and finally, the locking member 4.4 is opened, so that the top end of the supporting column 4.2 is in contact with the workpiece, then the locking member 4.4 is locked, the clamping block 4.1 clamps the supporting column, and the supporting column can resist the axial force during processing.
Example 2:
as shown in fig. 4, most of the present embodiment is the same as embodiment 1, except that: retaining member 4.4 is equipped with the locking hole 4.1.1 and the locking groove 4.1.2 that are linked together including clamping bolt 4.4.1 on the clamp splice 4.1, and support column 4.2 passes locking hole 4.1.1 and with locking hole 4.1.1 adaptation, and one end of clamping bolt 4.4.1 passes a lateral wall of locking groove 4.1.2 and with another lateral wall threaded connection of locking groove 4.1.2.
In the technical scheme, the clamping block is clamped by the clamping bolt to enable the locking hole to contract, so that the clamping effect on the clamping block can be realized, and another clamping scheme is provided.
Example 3:
as shown in fig. 5, most of the present embodiment is the same as embodiment 1, except that: retaining member 4.4 is equipped with the locking hole 4.1.1 that is linked together including holding screw 4.4.3 on the clamp splice 4.1, and support column 4.2 passes locking hole 4.1.1 and with locking hole 4.1.1 adaptation, holding screw 4.4.3 and clamp splice 4.1 threaded connection, and holding screw 4.4.3's one end is passed clamp splice 4.1 and is compressed tightly support column 4.2.
In the technical scheme, the clamping block is clamped by the clamping bolt to enable the locking hole to contract, so that the clamping effect on the clamping block can be realized, and another clamping scheme is provided.
Example 4:
the fixing method of the annular thin plate adopts the processing tool of the annular thin plate, and comprises the following steps:
preparing auxiliary support: the locking piece 4.4 is opened, and the locking piece 4.4 is locked after the supporting column 4.2 is pressed down;
b. preparing a floating support: connecting the upper end of the floating connecting piece 5.1 with a threaded hole on a workpiece, and screwing the floating connecting piece to the bottom;
c. fixing and supporting: placing the workpiece on a tool, aligning the corresponding position of the workpiece with the fixed supporting structure 3 and fixing;
d. floating and supporting: and (3) screwing out the floating connecting piece 5.1 to enable the bottom of the floating connecting piece 5.1 to be in contact with the supporting block 2, and then enabling the floating bolt 5.2 to penetrate through the supporting block 2 to be fixed with the floating connecting piece 5.1.
e. Auxiliary supporting: the retaining member 4.4 is opened, and the retaining member 4.4 is locked after the top end of the support column 4.2 contacts the workpiece.
Through implementing above-mentioned technical scheme, can make work piece processing occasionally a large amount of auxiliary stay, the clamping precision is high, and the clamping is simple convenient relatively, can improve clamping efficiency. The floating support structure 5 can provide a support effect, so that the support strength is increased, meanwhile, no positioning exists on the workpiece, and the over-positioning can be avoided. After the fixed supporting structure 3 fixes and positions the workpiece, the floating supporting structure 5 provides a supporting function, so that the positioning accuracy is ensured, and the supporting strength is also ensured.
The invention has the beneficial effects that: a large number of auxiliary supporting structures are adopted, the number of the fixed supporting structures is reduced, the operation of positioning support is simplified, and the fixing efficiency is improved. After the fixed supporting structure fixes and positions the workpiece, the auxiliary supporting structure and the floating supporting structure provide a supporting effect, so that the positioning accuracy is ensured, and the supporting strength is also ensured.
Claims (10)
1. A processing tool for an annular thin plate is characterized by comprising a bottom plate, a supporting block, a fixed supporting structure and an auxiliary supporting structure, wherein the supporting block is fixed with the bottom plate; the fixed supporting structure is fixed with the supporting block, and the workpiece is fixed with the fixed supporting structure; the auxiliary supporting structure comprises a clamping block, a supporting column, an expansion spring and a locking piece, wherein the clamping block is fixed with the supporting block, a mounting groove is formed in the supporting block, the expansion spring is arranged in the mounting groove, one end of the expansion spring is connected with the supporting block, the other end of the expansion spring is connected with the supporting column, one end of the supporting column is arranged in the mounting groove, the supporting column is connected with the mounting groove in a sliding mode, the other end of the supporting column penetrates through the clamping block, and the clamping block and the locking piece.
2. The annular thin plate processing tool according to claim 1, wherein the locking member comprises a clamping bolt and a clamping nut, the clamping block is provided with a locking hole and a locking groove which are communicated with each other, the support column penetrates through the locking hole and is matched with the locking hole, one end of the clamping bolt penetrates through the locking groove, and the clamping bolt and the clamping nut clamp the clamping block.
3. The annular thin plate processing tool according to claim 1, wherein the number of the fixed support structures is 3, and the 3 fixed support structures are circumferentially distributed.
4. The tooling of claim 3, wherein the fixed support structures are disposed on opposite outer sides of the base plate and the auxiliary support structures are disposed on opposite inner sides of the base plate.
5. The annular thin plate processing tool according to claim 1, 2, 3 or 4, wherein the fixing and supporting structure comprises a fixing column and a fixing screw, the upper end of the fixing column is provided with a positioning column matched with the workpiece, the lower end of the fixing column is in contact with the supporting block, and the fixing screw penetrates through the supporting block, the fixing column and the positioning column from the lower side of the supporting block in sequence and is in threaded connection with the workpiece.
6. The annular thin plate processing tool according to claim 1, 2, 3 or 4, further comprising a floating support structure, wherein the floating support structure comprises a floating connecting piece and a floating bolt, the upper end of the floating connecting piece is in threaded connection with the workpiece, the lower end of the floating connecting piece is in contact with the supporting block, and one end of the floating bolt penetrates through the supporting block and is in threaded connection with the floating connecting piece.
7. The annular thin plate processing tool according to claim 6, wherein the floating support structures are circumferentially distributed.
8. The annular thin plate processing tool according to claim 1, 2, 3 or 4, further comprising a positioning structure, wherein the positioning structure comprises a positioning dowel pin fixed with the bottom plate, and a positioning pin shaft matched with the workpiece is arranged at the top end of the positioning dowel pin.
9. The annular thin plate fixing method adopts the annular thin plate processing tool in the claims, and is characterized by comprising the following steps of:
a. preparing auxiliary support: the locking piece is opened, and the locking piece is locked after the supporting column is pressed downwards;
c. fixing and supporting: placing a workpiece on a tool, aligning the corresponding position of the workpiece with the fixed supporting structure and fixing;
e. auxiliary supporting: and opening the locking piece, and locking the locking piece after the top end of the support column contacts the workpiece.
10. The method of claim 9, further comprising step b and step d, wherein step b is disposed between step a and step c, and step d is disposed between step c and step e
b. Preparing a floating support: connecting the upper end of the floating connecting piece with a threaded hole on a workpiece and screwing the floating connecting piece to the bottom;
d. floating and supporting: and screwing out the floating connecting piece to enable the bottom of the floating connecting piece to be in contact with the supporting block, and then, penetrating the floating bolt through the supporting block to be fixed with the floating connecting piece.
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| CN112091670A (en) * | 2020-09-15 | 2020-12-18 | 苏州市华宏精密铸造有限公司 | Novel machining positioning device |
| CN112497121A (en) * | 2020-12-08 | 2021-03-16 | 苏州富强科技有限公司 | Positioning assembly and positioning method of fragile annular product |
| CN115502760A (en) * | 2021-06-22 | 2022-12-23 | 江阴市惠尔信精密装备股份有限公司 | Machining tool for connecting disc of wind driven generator |
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|---|---|
| CN111421355B (en) | 2021-06-25 |
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