CN105665915A - Large-tonnage friction welding machine - Google Patents
Large-tonnage friction welding machine Download PDFInfo
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- CN105665915A CN105665915A CN201610146688.3A CN201610146688A CN105665915A CN 105665915 A CN105665915 A CN 105665915A CN 201610146688 A CN201610146688 A CN 201610146688A CN 105665915 A CN105665915 A CN 105665915A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
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Abstract
The invention discloses a large-tonnage friction welding machine. The large-tonnage friction welding machine comprises a bed body, wherein a motor is arranged at one end of the bed body; a motor shaft of the motor is connected with a spindle box; a force-applying oil cylinder is arranged at the other end of the bed body; a piston rod on the force-applying oil cylinder is connected with a movable fixture; and the spindle box and the movable fixture are located between the motor and the force-applying oil cylinder. The problem is solved that in the existing large-tonnage and super-tonnage friction welding machines with upsetting forces exceeding 200 tonnages, the leakage rate of a hydrostatic thrust bearing exceeds standards, and the axial pressure provided by the force-applying oil cylinder during friction welding cannot be effectively balanced, thus a main shaft system of the friction welding machine is damaged, the friction welding machine cannot be used, and then great economic losses of use units are caused.
Description
Technical field
The invention belongs to welding technology field, relate to a kind of large-tonnage friction-welding machine.
Background technology
The upset force large-tonnage more than 200 tons, super-tonnage friction-welding machine, the axis system in its main spindle box generally adopts static pressure thrust bearing to bear the axial compressive force that force oil cylinder provides, to ensure friction-welding machine stress balance. The processing and manufacturing precision of static pressure thrust bearing is very high, assembly work is complicated, but actual production manufacture, use in static pressure thrust bearing there will be leakage rate and exceed standard, once leakage rate is excessive, the axial compressive force that the oil cylinder that exerts a force during friction welding provides cannot effectively be balanced, causing that friction-welding machine axis system damages, friction-welding machine cannot use, and causes use unit tremendous economic loss.
Summary of the invention
It is an object of the invention to provide a kind of large-tonnage friction-welding machine, solve the existing upset force large-tonnage more than 200 tons, super-tonnage friction-welding machine, static pressure thrust bearing exceeds standard owing to there will be leakage rate, cannot active balance friction welding time force oil cylinder provide axial compressive force, cause that friction-welding machine axis system damages, friction-welding machine cannot use, and causes the problem using the loss of unit tremendous economic.
The technical solution adopted in the present invention is, a kind of large-tonnage friction-welding machine, including lathe bed, one end of lathe bed is provided with motor, the motor shaft of motor connects main spindle box, the other end of lathe bed is provided with force oil cylinder, and the piston rod on force oil cylinder connects movable clamp, main spindle box and movable clamp between motor and force oil cylinder.
The feature of the present invention also resides in,
Wherein the structure of main spindle box is: include horizontally disposed main shaft, one end of main shaft is provided with brake, the other end of main shaft is provided with rolling clamp, the middle axis body of main shaft is sequentially installed with bearing block A, bearing block B, bearing block C and bearing block D, the middle endoporus place of bearing block A is sequentially installed with bearing A, bearing B, bearing C and bearings D, and bearing block A and bearing A is close to rolling clamp and arranges;
The middle endoporus place of bearing block B is sequentially installed with bearing E and piston A, load-carrying ring A it is provided with between piston A and bearing E, load-carrying ring A and piston A is all socketed on main shaft, bearing block B offers L-shaped oil inlet passage A, the interconnection end of oil inlet passage A connects with piston A, the vertical passage end of oil inlet passage A is through with the outer wall of bearing block B, is provided with pipe joint A, bearing E and is positioned at the end, one end of bearing block B and arranges near bearings D in the vertical passage of oil inlet passage A;
The middle endoporus place of bearing block C is sequentially installed with bearing F, piston B and bearing G, load-carrying ring B it is provided with between bearing F and piston B, load-carrying ring B and piston B is all socketed on main shaft, bearing F is positioned at the end, one end of bearing block C and arranges near bearing block B, bearing G is positioned at the other end end of bearing block C, bearing block C offers L-shaped oil inlet passage B, the interconnection end of oil inlet passage B connects with piston B, the vertical passage end of oil inlet passage B is through with the outer wall of bearing block C, is provided with pipe joint B in the vertical passage of oil inlet passage B;
The middle endoporus place of bearing block D is sequentially installed with bearing H, piston C, bearing I and bearing J, load-carrying ring C it is provided with between bearing H and piston C, load-carrying ring C and piston C is all socketed on main shaft, bearing H is positioned at the end, one end of bearing block D and arranges near bearing block C, bearing J is positioned at the other end end of bearing block D, bearing block D offers L-shaped oil inlet passage C, the interconnection end of oil inlet passage C connects with piston C, the vertical passage end of oil inlet passage C is through with the outer wall of bearing block D, is provided with pipe joint C in the vertical passage of oil inlet passage C.
Wherein main shaft be provided externally with main spindle box body, it is internal and each through being bolted on main spindle box body that bearing block A, bearing block B, bearing block C and bearing block D are all wrapped in main spindle box body.
Its middle (center) bearing A, bearing B, bearing I and bearing J are cylinder roller bearing;
Its middle (center) bearing C, bearing E, bearing F are self-aligning thrust roller bearing;
Wherein bearings D, bearing G are single row angular contact ball bearing;
Its middle (center) bearing H is thrust bearing.
Main shaft is wherein also respectively sleeved on nut A and is close to bearings D setting and between bearing block A and bearing block B with nut B, nut A; Nut B is close to bearing G and arranges and between bearing C and bearings D.
Wherein one end of piston A is provided with Glais ring A, Glais ring A near load-carrying ring A setting, and the other end of piston A is provided with UN sealing ring A;
Wherein one end of piston B is provided with Glais ring B, Glais ring B near load-carrying ring B setting, and the other end of piston B is provided with UN sealing ring B;
Wherein one end of piston C is provided with Glais ring C, Glais ring C near load-carrying ring C setting, and the other end of piston C is provided with UN sealing ring C.
Wherein load-carrying ring A and piston A one end end face contacts just; One end end face of load-carrying ring B and piston B contacts just; One end end face of load-carrying ring C and piston C contacts just.
Wherein motor is direct current generator, and one end of main shaft is connected with the power transmission shaft of motor by shaft coupling.
Wherein the piston rod on force oil cylinder and the connected mode of movable clamp are for being rigidly connected.
The invention has the beneficial effects as follows, this device includes four groups of bearing block combinative structurees, it is arranged on, and main spindle box is internal constitutes large-tonnage friction-welding machine with movable clamp, force oil cylinder, motor, reduce the difficulty of processing that friction-welding machine adopts static pressure thrust bearing to cause, reduce manufacturing cost so that large-tonnage friction-welding machine mass creates possibility.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of large-tonnage friction-welding machine of the present invention;
Fig. 2 is the internal structure schematic diagram of main spindle box in Fig. 1.
In figure, 1. lathe bed, 2. motor, 3. main spindle box, 4. weldment A, 5. movable clamp, 6. force oil cylinder, 7. weldment B, 8. rolling clamp, 9. main shaft, 10. bearing A, 11. bearing block A, 12. main spindle box body, 13. bearing B, 14. bearing C, 15. bearings D, 16. nut A, 17. bearing E, 18. load-carrying ring A, 19. Glais ring A, 20. piston A, 21. bearing block B, 22.UN sealing ring A, 23. pipe joint A, 24. oil inlet passage A, 25. bearing F, 26. load-carrying ring B, 27. piston B, 28. bearing block C, 29. Glais ring B, 30.UN sealing ring B, 31. pipe joint B, 32. oil inlet passage B, 33. bearing G, 34. nut B, 35. bearing H, 36. load-carrying ring C, 37. piston C, 38. Glais ring C, 39.UN sealing ring C, 40. bearing block D, 41. pipe joint C, 42. oil inlet passage C, 43. bearing I, 44. bearing J, 45. brake, 46. shaft coupling.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
One large-tonnage friction-welding machine of the present invention, structure is as shown in Figure 1, including lathe bed 1, one end of lathe bed 1 is provided with motor 2, the motor shaft of motor 2 connects main spindle box 3, the other end of lathe bed 1 is provided with force oil cylinder 6, and the piston rod on force oil cylinder 6 connects movable clamp 5, main spindle box 3 and movable clamp 5 between motor 2 and force oil cylinder 6 (main spindle box 3 and movable clamp 5 are arranged on lathe bed 1).
As shown in Figure 2, the structure of main spindle box 3 includes horizontally disposed main shaft 9 (main shaft 9 is parallel with lathe bed 1), one end of main shaft 9 is provided with brake 45, the other end of main shaft 9 is provided with rolling clamp 8, the middle axis body of main shaft 9 is sequentially installed with bearing block A11, bearing block B21, bearing block C28 and bearing block D40, the middle endoporus place of bearing block A11 is sequentially installed with bearing A10, bearing B13, bearing C14 and bearings D 15, and bearing A10 arranges (bearing block A11 is arranged) near rolling clamp 8 near rolling clamp 8;
The middle endoporus place of bearing block B21 is sequentially installed with bearing E17 and piston A20, load-carrying ring A18 it is provided with between piston A20 and bearing E17, load-carrying ring A18 and piston A20 is all socketed on main shaft 9, bearing block B21 offers L-shaped oil inlet passage A24, interconnection (L-shaped oil inlet passage A24 includes interconnection and the vertical passage) end of oil inlet passage A24 connects with piston A20, the vertical passage end of oil inlet passage A24 is through with the outer wall of bearing block B21, (pipe joint A23 connects outside oil circuit to be provided with pipe joint A23 in the vertical passage of oil inlet passage A24, pipe joint A23 is tightened on the vertical passage of oil inlet passage A24 and facilitates pressure oil to flow into oil inlet passage A24), bearing E17 is positioned at the end, one end of bearing block B21 and arranges near bearings D 15,
The middle endoporus place of bearing block C28 is sequentially installed with bearing F25, piston B27 and bearing G33, load-carrying ring B26 it is provided with between bearing F25 and piston B27, load-carrying ring B26 and piston B27 is all socketed on main shaft 9, bearing F25 is positioned at the end, one end of bearing block C28 and arranges near bearing block B21, bearing G33 is positioned at the other end end of bearing block C28, bearing block C28 offers L-shaped oil inlet passage B32, the interconnection end of oil inlet passage B32 connects with piston B27 (L-shaped oil inlet passage B32 includes interconnection and vertical passage), the vertical passage end of oil inlet passage B32 is through with the outer wall of bearing block C28, pipe joint B31 (pipe joint B31 is tightened on the vertical passage of oil inlet passage B32 and facilitates pressure oil to flow into oil inlet passage B32) it is provided with in the vertical passage of oil inlet passage B32,
The middle endoporus place of bearing block D40 is sequentially installed with bearing H35, piston C37, bearing I 43 and bearing J44, load-carrying ring C36 it is provided with between bearing H35 and piston C37, load-carrying ring C36 and piston C37 is all socketed on main shaft 9, bearing H35 is positioned at the end, one end of bearing block D40 and arranges near bearing block C28, bearing J44 is positioned at the other end end of bearing block D40, bearing block D40 offers L-shaped oil inlet passage C42, the interconnection end of oil inlet passage C42 connects with piston C37 (L-shaped oil inlet passage C42 includes interconnection and vertical passage), the vertical passage end of oil inlet passage C42 is through with the outer wall of bearing block D40, pipe joint C41 (pipe joint C41 is tightened on the vertical passage of oil inlet passage C42 and facilitates pressure oil to flow into oil inlet passage C42) it is provided with in the vertical passage of oil inlet passage C42,
Wherein be provided externally with main spindle box body 12, bearing block A11 and internal structure, bearing block B21 and internal structure, bearing block C28 and internal structure, bearing block D40 and the internal structure thereof of main shaft 9 is all wrapped in main spindle box body 12 inside and each through being bolted on main spindle box body 12.
Its middle (center) bearing A10, bearing B13, bearing I 43 and bearing J44 are cylinder roller bearing;
Its middle (center) bearing C14, bearing E17, bearing F25 are self-aligning thrust roller bearing;
Wherein bearings D 15, bearing G33 are single row angular contact ball bearing;
Its middle (center) bearing H35 is thrust bearing.
Main shaft 9 is wherein also respectively sleeved on nut A16 and nut B34, nut A16 are close to bearings D 15 and arrange and between bearing block A11 and bearing block B21; Nut B34 is close to bearing G33 and arranges and between bearing C14 and bearings D 15.
Wherein one end of piston A20 is provided with Glais ring A19 (sealing), Glais ring A19 is arranged near load-carrying ring A18, and the other end of piston A20 is provided with UN sealing ring A22 (the pressure oil sealing against leakage in endoporus in the middle of bearing block B21);
Wherein one end of piston B27 is provided with Glais ring B29 (sealing), Glais ring B29 is arranged near load-carrying ring B26, and the other end of piston B27 is provided with UN sealing ring B30 (the pressure oil sealing against leakage in endoporus in the middle of bearing block C28);
Wherein one end of piston C37 is provided with Glais ring C38 (sealing), Glais ring C38 is arranged near load-carrying ring C36, and the other end of piston C37 is provided with UN sealing ring C39 (the pressure oil sealing against leakage in endoporus in the middle of bearing block D40).
Wherein load-carrying ring A18 and piston A20 one end end face (gently) just contacts; One end end face of load-carrying ring B26 and piston B27 (gently) just contacts; One end end face of load-carrying ring C36 and piston C37 (gently) just contacts.
Wherein motor 2 is direct current generator, and one end of main shaft 9 is connected with the power transmission shaft (motor shaft) of motor 2 by shaft coupling 46.
Wherein the piston rod on force oil cylinder 6 and the connected mode of movable clamp 5 are for being rigidly connected.
Wherein piston A20, piston B27 and piston C37 are hollow-core construction so that being socketed on main shaft 9, and bearing A10, bearing B13, bearing C14, bearings D 15, bearing E17, bearing F25, bearing H35, bearing I 43 and bearing J44 and main shaft 9 are respectively formed dimensional fits (each piston and main shaft 9 structure adapt).
One large-tonnage friction-welding machine operation principle of the present invention is, rolling clamp 8 is clamped with weldment A4, movable clamp 5 is clamped with weldment B7, weldment A4 and weldment B7 is just to setting, by dazzling nut A16, nut B34 passes through bearings D 15, bearing G33 adjusts the end-play of all the other bearings on main shaft 9, the rolling element in each bearing is made to have good pretension amount with bearing internal external ring, thus improving bearing capacity and the service life of each bearing, during friction welding, the piston rod of force oil cylinder 6 promotes movable clamp 5 to do rectilinear motion towards weldment A4, after movable clamp 5 moves a certain distance, the drive axis of motor 2, main shaft 9 is driven by shaft coupling 46, rolling clamp 8, weldment A4 rotates, along with weldment A4 and weldment B7 offers friction, force oil cylinder 6 is progressively risen to upsetting force by the axial compressive force offered according to the pressure set, in this process, the pressure oil of hydraulic system passes through pipe joint A23, pipe joint B31, pipe joint C41 has respectively entered bearing block B21 and the piston A20 oil pocket formed, in the oil pocket that the oil pocket of bearing block C28 and piston B27 formation and bearing block D40 and piston C37 are formed, each oil pocket is respectively provided with pressure, bearing H35 is produced thrust to the right by piston C37, bearing F25 is produced thrust to the right by piston B27, bearing E17 is produced thrust to the right by piston A20, these three thrust to the right adds the axial compressive force that when the upper bearing (metal) C14 centripetal axial force provided balances welding together, force oil cylinder applies, axis system have employed the mode of level Four deboost makes welding machine reach stress balance, the bearing bearing axial force is bearing C14, bearing E17, bearing F25, bearing H35,Bearing A10, bearing B13, bearing I 43 and bearing J44 all bear radial force, add main shaft rigidity, improve the bearing capacity of welding machine, 3～5 minutes motors 2 power-off before friction terminates, apply brake in first 1.2 seconds in blocking power and main shaft 9 is started braking, force oil cylinder 6 applies upset force pressurize a period of time subsequently, under the combined effect of brake 45 and blocking power, main shaft 9 stops operating, rolling clamp 8 unclamps, force oil cylinder 6 drives the part that movable clamp 5 clamping has been welded to retreat to original position, movable clamp 5 unclamps, force oil cylinder 6 pressure release, take off the part welded, so far friction welding is completed.
Claims (9)
1. a large-tonnage friction-welding machine, it is characterized in that: include lathe bed (1), one end of lathe bed (1) is provided with motor (2), the motor shaft of motor (2) connects main spindle box (3), the other end of described lathe bed (1) is provided with force oil cylinder (6), piston rod in force oil cylinder (6) connects movable clamp (5), and main spindle box (3) and movable clamp (5) are positioned between motor (2) and force oil cylinder (6).
2. a kind of large-tonnage friction-welding machine according to claim 1, it is characterized in that: the structure of described main spindle box (3) is: include horizontally disposed main shaft (9), one end of main shaft (9) is provided with brake (45), the other end of main shaft (9) is provided with rolling clamp (8), the middle axis body of main shaft (9) is sequentially installed with bearing block A (11), bearing block B (21), bearing block C (28) and bearing block D (40), the middle endoporus place of described bearing block A (11) is sequentially installed with bearing A (10), bearing B (13), bearing C (14) and bearings D (15), bearing block A (11) and bearing A (10) is close to rolling clamp (8) and arranges,
The middle endoporus place of described bearing block B (21) is sequentially installed with bearing E (17) and piston A (20), load-carrying ring A (18) it is provided with between piston A (20) and bearing E (17), load-carrying ring A (18) and piston A (20) is all socketed on described main shaft (9), bearing block B (21) offers L-shaped oil inlet passage A (24), the interconnection end of described oil inlet passage A (24) connects with described piston A (20), the vertical passage end of described oil inlet passage A (24) is through with the outer wall of bearing block B (21), it is provided with pipe joint A (23) in the vertical passage of described oil inlet passage A (24), described bearing E (17) is positioned at the end, one end of bearing block B (21) and arranges near bearings D (15),
The middle endoporus place of described bearing block C (28) is sequentially installed with bearing F (25), piston B (27) and bearing G (33), load-carrying ring B (26) it is provided with between bearing F (25) and piston B (27), load-carrying ring B (26) and piston B (27) is all socketed on described main shaft (9), described bearing F (25) is positioned at the end, one end of bearing block C (28) and arranges near bearing block B (21), bearing G (33) is positioned at the other end end of bearing block C (28), bearing block C (28) offers L-shaped oil inlet passage B (32), the interconnection end of oil inlet passage B (32) connects with piston B (27), the vertical passage end of described oil inlet passage B (32) is through with the outer wall of bearing block C (28), it is provided with pipe joint B (31) in the vertical passage of described oil inlet passage B (32),
The middle endoporus place of described bearing block D (40) is sequentially installed with bearing H (35), piston C (37), bearing I (43) and bearing J (44), load-carrying ring C (36) it is provided with between bearing H (35) and piston C (37), load-carrying ring C (36) and piston C (37) is all socketed on described main shaft (9), bearing H (35) is positioned at the end, one end of bearing block D (40) and arranges near described bearing block C (28), bearing J (44) is positioned at the other end end of bearing block D (40), described bearing block D (40) offers L-shaped oil inlet passage C (42), the interconnection end of oil inlet passage C (42) connects with piston C (37), the vertical passage end of oil inlet passage C (42) is through with the outer wall of bearing block D (40), pipe joint C (41) it is provided with in the vertical passage of oil inlet passage C (42).
3. a kind of large-tonnage friction-welding machine according to claim 2, it is characterized in that: described main shaft (9) be provided externally with main spindle box body (12), it is internal and each through being bolted on main spindle box body (12) that described bearing block A (11), bearing block B (21), bearing block C (28) and bearing block D (40) are all wrapped in main spindle box body (12).
4. a kind of large-tonnage friction-welding machine according to claim 2, it is characterised in that: described bearing A (10), bearing B (13), bearing I (43) and bearing J (44) are cylinder roller bearing;
Described bearing C (14), bearing E (17), bearing F (25) are self-aligning thrust roller bearing;
Described bearings D (15), bearing G (33) are single row angular contact ball bearing;
Described bearing H (35) is thrust bearing.
5. a kind of large-tonnage friction-welding machine according to claim 2, it is characterized in that: described main shaft (9) is also respectively sleeved on nut A (16) and nut B (34), nut A (16) are close to bearings D (15) and arrange and be positioned between described bearing block A (11) and bearing block B (21); Described nut B (34) is close to bearing G (33) and is arranged and be positioned between bearing C (14) and bearings D (15).
6. a kind of large-tonnage friction-welding machine according to claim 2, it is characterized in that: one end of described piston A (20) is provided with Glais ring A (19), Glais ring A (19) is arranged near load-carrying ring A (18), and the other end of described piston A (20) is provided with UN sealing ring A (22);
One end of described piston B (27) is provided with Glais ring B (29), Glais ring B (29) is arranged near load-carrying ring B (26), and the other end of described piston B (27) is provided with UN sealing ring B (30);
One end of described piston C (37) is provided with Glais ring C (38), Glais ring C (38) is arranged near load-carrying ring C (36), and the other end of described piston C (37) is provided with UN sealing ring C (39).
7. a kind of large-tonnage friction-welding machine according to claim 2, it is characterised in that: described load-carrying ring A (18) contacts just with piston A (20) one end end face; Described load-carrying ring B (26) contacts just with one end end face of piston B (27); Described load-carrying ring C (36) contacts just with one end end face of piston C (37).
8. a kind of large-tonnage friction-welding machine according to claim 2, it is characterized in that: described motor (2) is direct current generator, one end of described main shaft (9) is connected with the power transmission shaft of motor (2) by shaft coupling (46).
9. a kind of large-tonnage friction-welding machine according to claim 1, it is characterised in that: the connected mode of the piston rod on described force oil cylinder (6) and movable clamp (5) is for being rigidly connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610146688.3A CN105665915B (en) | 2016-03-15 | 2016-03-15 | Large-tonnage friction welding machine |
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| CN201610146688.3A CN105665915B (en) | 2016-03-15 | 2016-03-15 | Large-tonnage friction welding machine |
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| CN105665915A true CN105665915A (en) | 2016-06-15 |
| CN105665915B CN105665915B (en) | 2017-01-11 |
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| CN106334871A (en) * | 2016-08-30 | 2017-01-18 | 重庆德蚨乐机械制造有限公司 | Friction welding machine and spindle force balancing assembly thereof |
| CN107127445A (en) * | 2017-06-19 | 2017-09-05 | 机械科学研究院哈尔滨焊接研究所 | Thrust bearing floating mount inertia friction welder carries axis system |
| CN114226951A (en) * | 2021-12-22 | 2022-03-25 | 天津鹏鹄科技有限公司 | Main spindle box |
| US20220371120A1 (en) * | 2019-11-12 | 2022-11-24 | Osaka University | Dissimilar material solid phase bonding method, dissimilar material solid phase bonded structure, and dissimilar material solid phase bonding device |
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| US20220371120A1 (en) * | 2019-11-12 | 2022-11-24 | Osaka University | Dissimilar material solid phase bonding method, dissimilar material solid phase bonded structure, and dissimilar material solid phase bonding device |
| US11872651B2 (en) * | 2019-11-12 | 2024-01-16 | Osaka University | Dissimilar material solid phase bonding method, dissimilar material solid phase bonded structure, and dissimilar material solid phase bonding device |
| CN114226951A (en) * | 2021-12-22 | 2022-03-25 | 天津鹏鹄科技有限公司 | Main spindle box |
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