Multi-axis clamping tool for vacuum electron beam girth weld welding

Abstract

The application discloses a multi-axis clamping tool for vacuum electron beam ring weld welding, which comprises a workbench; a plurality of parallel driving clamping machine heads are arranged on the left part of the workbench; a plurality of tailstocks for driven machine tools are arranged on the left end of the workbench; cross synchronous belts are arranged between the driving clamping machine heads to realize transmission; eccentric idler assemblies are arranged on the cross synchronous belts; symmetric driving clamping machine heads and tailstocks for driving machine tools are arranged on the right part of the workbench; the driving clamping machine heads and the driving clamping machine heads are connected through shaft couplings and connecting shafts to realize transmission; a servo motor is connected to the driving clamping machine head at one end; and the servo motor is connected to an operation table. The application can improve the number of clamped workpieces, reduce the cost of vacuum electron beam welding of single parts, and improve production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electron beam welding, more particularly to a multi-axis clamping tool for vacuum electron beam girth weld welding. BACKGROUND

[0002] Electron beam welding is a connection method that uses a focused electron beam as a welding heat source to melt metal and form a weld. The basic principle of the welding process is as follows: in an electron gun under high vacuum conditions, the cathode material is heated and emits more electrons, the electrons are concentrated by an electrostatic lens, accelerated by a high-voltage electric field, and then focused by an electromagnetic lens to form a high-energy-density electron beam; the high-energy-density electron beam with extremely high kinetic energy hits the surface of the metal workpiece, converting the kinetic energy into heat energy, melting and solidifying the metal workpiece to form a weld, and achieving welding of the metal workpiece.

[0003] Electron beam welding is a high-energy-density welding method that is mostly performed in a vacuum environment. Girth weld welding requires a chuck driven by a servo motor to achieve girth weld welding. The vacuum pumping before welding and the gas filling after welding take a long time and consume a lot of energy. For small and medium-sized parts, single-axis part driving for vacuum electron beam welding has low welding efficiency and high welding cost.

[0004] The power of the servo motor carried by the vacuum electron beam welding machine is small. When large parts are clamped and welded, multi-axis linkage is required, which exceeds the rotational inertia of the servo motor, affecting the control accuracy of the servo motor and further affecting the welding quality.

[0005] Therefore, there is an urgent need for a multi-axis clamping tool for vacuum electron beam girth weld welding. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a multi-axis clamping tool for vacuum electron beam girth weld welding to solve the problems in the background art.

[0007] To solve the above technical problems, the technical solutions adopted by the present application are as follows.

[0008] A multi-axis clamping tool for vacuum electron beam girth welding includes a workbench; a plurality of driven clamping heads for clamping workpieces are arranged side by side on the left part of the workbench, and a plurality of tailstocks for tail fixing are arranged on the left end of the workbench and used in cooperation with the driven clamping heads; cross synchronous belts are arranged between the driven clamping heads to realize transmission, and eccentric idler assemblies for tensioning the cross synchronous belts are arranged on the cross synchronous belts; a driving clamping head and a driving tailstock are symmetrically arranged on the right part of the workbench, the driven clamping heads and the driving clamping head are connected through a shaft coupling and a connecting shaft to realize transmission, and a servo motor for providing power is connected to the driven clamping head at one end; and the servo motor is connected to an operation table.

[0009] Further optimization of the technical scheme, the driven clamping head and the tailstock are installed on the workbench through a head fixing seat, and sliding keys are arranged between the driven clamping head and the head fixing seat and between the head fixing seat and the workbench to realize positioning; screws are arranged on the head fixing seat, and a sliding groove is arranged on the driven clamping head and can pass through the screws and be arranged along the sliding direction.

[0010] Further optimization of the technical scheme, the driven clamping head includes a self-centering three-jaw chuck for realizing self-centering clamping of the workpiece, and the self-centering three-jaw chuck is connected to a coaxially arranged clamping head transmission shaft; a keyless synchronous pulley is sleeved on the other end of the clamping head transmission shaft, and a clamping head box is connected to the middle part of the clamping head transmission shaft; a combination of a deep groove ball bearing and a bearing seat is arranged on the side wall of the clamping head box and connected to the clamping head transmission shaft, and a thrust ball bearing is arranged on the clamping head transmission shaft at a position inside the clamping head box and close to the keyless synchronous pulley.

[0011] Further optimization of the technical scheme, the connecting shaft includes a driven box one-way bearing connected to the keyless synchronous pulley in the driven clamping head, the driven box one-way bearing is connected to a driven box transmission shaft, and the other end of the driven box transmission shaft is connected to the shaft coupling; the shaft coupling is further connected to a driving box transmission shaft, the other end of the driving box transmission shaft is connected to a driving box one-way bearing, and the driving box one-way bearing is connected to the keyless synchronous pulley in the driving clamping head.

[0012] Thanks to the above technical scheme, the present application has the following technical progress.

[0013] The application provides a multi-shaft clamping tool for vacuum electron beam girth weld welding, which adopts a self-centering three-jaw chuck, a tail seat for a machine tool clamps a workpiece, and the coaxial degree of the workpiece is high; the adjustable tail seat and the chuck distance are positioned through sliding keys, different length workpieces are welded, and the application range is wide; two groups of one-way bearings are arranged, and the positive and negative rotation drives the rotation of the clamping machine heads on both sides, so that the small power motor can drive the clamping and welding of multiple large parts. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the application;

[0015] Figure 2 It is a structural schematic diagram of the driven clamping machine head in the application;

[0016] Figure 3 It is a structural schematic diagram of the connection of a plurality of driven clamping machine heads in the application;

[0017] Figure 4 It is a structural schematic diagram of the front view of the application;

[0018] Figure 5 It is a structural schematic diagram of the welding of the workpiece.

[0019] Wherein: 1, workbench, 2, driven clamping machine head, 3, clamping machine head box, 4, shaft coupling, 5, screw, 6, driven clamping machine head, 7, driven tail seat for machine tool, 8, self-centering three-jaw chuck, 9, bearing seat, 10, deep groove ball bearing, 11, driven tail seat for machine tool, 12, thrust ball bearing, 13, clamping machine head transmission shaft, 14, keyless synchronous pulley, 15, sliding key, 16, idler assembly, 17, cross synchronous belt, 18, servo motor, 19, machine head fixing seat, 20, driven box one-way bearing, 21, driven box transmission shaft, 22, driving box transmission shaft, 23, driving box one-way bearing, 24, workpiece. DETAILED DESCRIPTION

[0020] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0021] A multi-shaft clamping tool for vacuum electron beam girth weld welding, which combines Figures 1 to 5As shown, including driven clamping head 2, driven tailstock 7, head fixing seat 19, sliding key 15, cross synchronous belt 17, eccentric idler assembly 16, driving clamping head 6, driving tailstock 11, shaft coupling 4, connecting shaft, servo motor 18. Driven clamping head 2 includes self-centering three-jaw chuck 8, clamping head drive shaft 13, keyless synchronous pulley 14, clamping head box 3, deep groove ball bearing 10, bearing seat 9, thrust ball bearing 12. The connecting shaft includes driven box one-way bearing 20, driven box drive shaft 21, driving box drive shaft 22, driving box one-way bearing 23.

[0022] The left part of the workbench 1 is provided with a plurality of driven clamping heads 2 arranged side by side for clamping workpieces, and the left end of the workbench 1 is provided with a plurality of driven tailstocks 7 used in cooperation with the driven clamping heads 2 for fixing the tail part of the workpiece. Crossed synchronous belts 17 are arranged between the driven clamping heads 2 to achieve transmission, and eccentric idler assemblies 16 are arranged on the crossed synchronous belts 17 to achieve tensioning of the crossed synchronous belts 17.

[0023] The driven clamping head 2 includes a self-centering three-jaw chuck 8 for self-centering clamping of workpieces, and the self-centering three-jaw chuck 8 is connected to a coaxially arranged clamping head drive shaft 13. The other end of the clamping head drive shaft 13 is sleeved with a keyless synchronous pulley 14, and the middle part of the clamping head drive shaft 13 is sleeved with a clamping head box 3. The two side walls of the clamping head box 3 are connected to the clamping head drive shaft 13 through a combination of deep groove ball bearings 10 and bearing seats 9. A thrust ball bearing 12 is arranged at a position inside the clamping head box 3 close to the keyless synchronous pulley 14, and the thrust ball bearing 12 is sleeved on the clamping head drive shaft 13.

[0024] The right part of the workbench 1 is provided with driving clamping heads 6 and driving tailstocks 11 symmetrically arranged with the driven clamping heads 2 and driven tailstocks 7 of the left part of the workbench 1, respectively. The driven clamping heads and the driving clamping heads 6 are connected through shaft couplings 4 and connecting shafts to achieve transmission.

[0025] The driven clamping heads and the driven tailstocks 7 are installed on the workbench 1 through head fixing seats 19, and the driven clamping heads 2 and the head fixing seats 19, as well as the head fixing seats 19 and the workbench 1, are positioned by sliding keys 15. Screws 5 are arranged on the head fixing seats 19, and sliding grooves are arranged on the driven clamping heads to pass through the screws 5 and along the sliding direction to define the sliding interval.

[0026] The connecting shaft comprises a driven box one-way bearing 20 connected with the driven clamping head keyless synchronous pulley 14, the driven box one-way bearing 20 is connected with the driven box transmission shaft 21, and the other end of the driven box transmission shaft 21 is connected with the shaft coupling 4. The shaft coupling 4 is also connected with the driving box transmission shaft 22, the other end of the driving box transmission shaft 22 is connected with the driving box one-way bearing 23, and the driving box one-way bearing 23 is connected with the driving clamping head keyless synchronous pulley 14.

[0027] The working right part, the driven clamping head 2 at one end is connected with the servo motor 18, which is used to provide power for the multi-axis clamping tool. The servo motor is connected with the operation platform.

[0028] The driven box synchronous pulley and the driven box transmission shaft 21 all transmit torque through the one-way bearing, and the transmission torque directions are opposite. When the servo motor 18 rotates clockwise, the driving box transmission shaft 22 and the driven box transmission shaft 21 are driven to rotate, the driving box one-way bearing 23 transmits torque, drives the driving box side synchronous pulley to rotate, thereby driving the driving side clamping head 5 to rotate, the driven box one-way bearing 20 idles and does not transmit torque, the driven box side synchronous pulley remains stationary, and the driving box side clamping workpiece starts to weld. When the servo motor 18 rotates counterclockwise, the driving box one-way bearing 23 idles and does not transmit torque, the driving box side synchronous pulley remains stationary, the driven box one-way bearing 20 transmits torque, drives the driven box synchronous pulley to rotate, thereby driving the driven box side clamping head to rotate and starting to weld the driven box side clamping workpiece.

[0029] When the application is used to weld a girth weld of a transmission shaft workpiece, the specific use steps are as follows:

[0030] 1) The transmission shaft base to be welded is clamped on the two side self-centering three-jaw chucks 8, the operation platform controls the clamping head to rotate, and the dial gauge is used to measure the roundness runout and end face runout of the joint surface of the transmission shaft base to be welded.

[0031] 2) The distance between the machine tool tailstock and the clamping head is adjusted, the transmission shaft base to be welded and the end cover are assembled, the machine tool tailstock handwheel is rotated, the transmission shaft base to be welded and the end cover are clamped and locked, and the dial gauge is used to measure the roundness runout of the joint surface.

[0032] 3) The machine tool workbench 1 is put into the furnace, and the vacuum electron beam welder is vacuumed.

[0033] 4) The position of the workbench 1 is adjusted, the electron gun is aligned with the center axis of the driving side clamping workpiece, the operation platform controls the servo motor 18 to rotate clockwise, thereby driving the driving side clamping workpiece to rotate and performing spot welding fixation on the workpiece to be welded 24, and after the spot welding is completed, the girth weld is welded. The driving side clamping workpiece girth weld is welded in turn.

[0034] 5) Adjust the position of the workbench 1, and align the electron gun with the center axis of the workpiece on the driven side. Operate the control servo motor 18 to rotate counterclockwise, thereby driving the workpiece on the driven side to rotate and point-welding the workpiece 24 to be welded. After point-welding, perform circumferential seam welding. Weld the circumferential seam of the workpiece on the driven side in sequence.

[0035] 6) After welding, inflate the vacuum electron beam welder, and disassemble the welded workpiece.

Claims

1. A multi-axis clamping tool for vacuum electron beam girth weld welding, characterized by: The utility model provides a kind of machine tool, including workbench (1);The workbench (1) left part is provided with several parallel settings, for workpiece clamping driven clamping head (2), workbench (1) left end is provided with several with driven clamping head (2) cooperation, for tail fixed driven machine tool tailstock (7);Crossed synchronous belt (17) is arranged between the driven clamping head (2) and is driven, and eccentric idler assembly (16) for realizing the tensioning of crossed synchronous belt (17) is arranged on crossed synchronous belt (17);The workbench (1) right part is provided with symmetrically arranged driving clamping head (6), driving machine tool tailstock (11), and driven clamping head (2) and driving clamping head (6) are connected between coupling (4), connecting shaft and are connected to realize transmission, and the driven clamping head (2) located in one end is connected for servo motor (18) for providing power;The servo motor (18) is connected to operating platform; The driven clamping head includes self-centering three-jaw chuck (8) for realizing workpiece clamping self-centering, and the self-centering three-jaw chuck (8) is connected with coaxially arranged clamping head transmission shaft (13);The other end of the clamping head transmission shaft (13) is sleeved with keyless synchronous pulley (14), and the middle part of the clamping head transmission shaft (13) is connected with sleeved clamping head box (3);The sidewall of the clamping head box (3) is connected with the clamping head transmission shaft (13) through the combination of deep groove ball bearing (10) and bearing seat (9), and the position close to the keyless synchronous pulley (14) on the inner side of the clamping head box (3) is provided with thrust ball bearing (12) sleeved on the clamping head transmission shaft (13); The connecting shaft includes driven box one-way bearing (20) connected with the keyless synchronous pulley (14) in the driven clamping head, the driven box one-way bearing (20) is connected with driven box transmission shaft, and the other end of the driven box transmission shaft (21) is connected with coupling (4);The coupling (4) is also connected with driving box transmission shaft (22), the other end of the driving box transmission shaft (22) is connected with driving box one-way bearing (23), and the driving box one-way bearing (23) is connected with the keyless synchronous pulley (14) in the driving clamping head; When the servo motor (18) rotates clockwise, the driving box transmission shaft (22) and the driven box transmission shaft (21) are driven to rotate, the driving box one-way bearing (23) transmits torque, drives the driving box side synchronous pulley to rotate, so as to drive the driving side clamping head to rotate, the driven box one-way bearing (20) idles, does not transmit torque, and the driven box side synchronous pulley remains stationary, and the driving box side clamping workpiece starts welding;When the servo motor (18) rotates counterclockwise, the driving box one-way bearing (23) idles, does not transmit torque, and the driving box side synchronous pulley remains stationary, the driven box one-way bearing (20) transmits torque, drives the driven box synchronous pulley to rotate, so as to drive the driven box side clamping head to rotate, and the driven box side clamping workpiece starts welding.

2. A multi-axis clamping tool for vacuum electron beam girth welding according to claim 1, characterized in that: The driven clamping head, the driven tailstock for machine tool (7) is installed on the workbench (1) through the head fixing seat (19), the sliding key (15) is used for positioning between the driven clamping head (2) and the head fixing seat (19) and between the head fixing seat (19) and the workbench (1); the head fixing seat (19) is provided with the screw (5), and the driven clamping head is provided with the sliding groove which can pass through the screw (5) and is arranged along the sliding direction.

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