CN106891089B - Multipurpose main shaft structure - Google Patents

Multipurpose main shaft structure Download PDF

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Publication number
CN106891089B
CN106891089B CN201710187378.0A CN201710187378A CN106891089B CN 106891089 B CN106891089 B CN 106891089B CN 201710187378 A CN201710187378 A CN 201710187378A CN 106891089 B CN106891089 B CN 106891089B
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CN
China
Prior art keywords
connecting rod
transmission
main shaft
spindle
shaft
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CN201710187378.0A
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CN106891089A (en
Inventor
田亚峰
朱钢
王翰韬
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Ningbo Haitian Precision Machinery Co Ltd
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Ningbo Haitian Precision Machinery Co Ltd
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Priority to CN201710187378.0A priority Critical patent/CN106891089B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12Non-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
    • B23K20/122Non-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 using a non-consumable tool, e.g. friction stir welding
    • B23K20/1245Non-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 using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
    • B23K20/125Rotary tool drive mechanism
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/26Auxiliary equipment

Abstract

The invention discloses a multipurpose main shaft structure which comprises a main shaft, a main motor, a first transmission mechanism and a withdrawing device, wherein the main motor is connected with the first transmission mechanism, the main shaft is connected with the first transmission mechanism, the first transmission mechanism is installed in a first reduction gearbox, the main shaft is vertically installed in a main shaft box body, an axial through hole is formed in the main shaft, the withdrawing device is detachably installed on the first reduction gearbox, the main shaft box body is fixed at the lower end of the first reduction gearbox, the withdrawing device comprises a servo motor, a second reduction gearbox and an electric cylinder which are vertically arranged, the servo motor is connected with the second reduction gearbox, the second reduction gearbox is connected with the electric cylinder, the output end of the electric cylinder is detachably connected with a connecting rod, and the connecting rod penetrates through the axial through hole. The main shaft structure can be used as friction welding equipment and a numerical control machining center, rapid and flexible conversion between the friction welding equipment and the numerical control machining center is realized, the application range of the equipment is greatly expanded, the requirement of one machine for multiple purposes of a user is met, and the purchase cost of the equipment is greatly saved.

Description

Multipurpose main shaft structure
Technical Field
The invention relates to a main shaft structure, in particular to a multipurpose main shaft structure.
Background
With the research and application of friction stir welding technology in China, the technology is gradually mature and stable, and the friction stir welding technology is widely applied to high-speed rail, aerospace and pipeline welding processing. The advantages of friction stir welding are numerous, but they have a significant disadvantage in that the stir head leaves the weld bead leaving a dimple, called a keyhole, at the end of the weld bead. The existence of the keyhole not only influences the appearance of the welding line, but also influences the welding line performance at the tail end of the weldment to a certain extent.
With the development of friction welding technology, the problem of keyhole is properly solved by the back-drawing friction stir welding, so more and more manufacturers adopt back-drawing friction welding for welding. Fig. 1 is a schematic structural diagram of a drawing-back type stirring head, wherein 1 is a stirring pin, 2 is a stirring head (shaft shoulder), and 3 is a knife handle. The principle of the back-pumping type friction stir welding is that a stirring pin is separated from a stirring head (shaft shoulder), and a control system is used for controlling the axial expansion of the stirring pin, so that a keyhole can be automatically eliminated in the welding process, and the quality of a welded part is improved.
At present, all friction stir welding machines are special equipment, and particularly, the friction stir welding machines adopting a back-suction type process method can only carry out friction stir processing. When a manufacturer needs to perform production transformation or temporarily increase a numerical control machining procedure, the special friction welding machine can only be idle, and a numerical control machining center needs to be purchased additionally, so that great pressure is brought to the production cost of the manufacturer.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects of the prior art, the multipurpose main shaft structure can be used as friction welding equipment and can also be used as a numerical control machining center, is simple in structure, can realize quick and flexible conversion between the friction welding equipment and the numerical control machining center through simple transformation, greatly expands the application range of the equipment, can meet the requirement of one machine with multiple purposes of a user, and greatly saves the purchase cost of the equipment.
The technical scheme adopted by the invention for solving the technical problems is as follows: a multipurpose spindle structure comprises a spindle, a main motor, a first transmission mechanism and a withdrawing device, wherein the output end of the main motor is connected with the input end of the first transmission mechanism, the spindle is connected with the output end of the first transmission mechanism, the first transmission mechanism is installed in a first reduction gearbox, the spindle is vertically installed in a spindle box body, an axial through hole is formed in the spindle, the withdrawing device is detachably installed on the first reduction gearbox, the spindle box body is fixed at the lower end of the first reduction gearbox, the withdrawing device comprises a servo motor, a second reduction gearbox and an electric cylinder which are vertically arranged, the output end of the servo motor is connected with the input end of the second reduction gearbox, the output end of the second reduction gearbox is connected with the input end of the electric cylinder, and the output end of the electric cylinder is detachably connected with a connecting rod, the connecting rod penetrates through the axial through hole and is a long connecting rod or a short connecting rod, a friction welding tool handle is installed at the bottom end of the long connecting rod and is fixed on the main shaft, a stirring needle and a stirring head are installed in the friction welding tool handle, the stirring needle is fixed at the bottom end of the long connecting rod, and the stirring head is sleeved on the stirring needle; the bottom end of the short connecting rod is provided with a broach claw, the lower end of the main shaft is provided with a main shaft taper shank, the upper end of the main shaft taper shank is fixed with a main shaft blind rivet, the main shaft blind rivet is connected with the broach claw, and the main shaft taper shank is used for installing a numerical control cutter.
When the long connecting rod is arranged on the main shaft, the friction welding tool handle, the stirring pin and the stirring head are directly arranged at the bottom end of the long connecting rod, the drawing-back device drives the stirring pin to complete the stretching action, and the multipurpose main shaft structure is used as friction stir welding equipment. During operation, the servo motor drives the electric cylinder after the torque is increased through the second reduction gearbox, the torque is transmitted to the connecting rod through the electric cylinder, the axial telescopic action of the connecting rod is completed by utilizing the positive and negative rotation of the servo motor, the position of the stirring pin at the welding seam is adjusted through the axial telescopic action of the connecting rod, the servo motor stops working after the stirring pin reaches a proper position, then the main motor works, the torque is transmitted to the main shaft through the first transmission mechanism, the main shaft is driven to rotate, and then the friction welding action is completed. When the numerical control cutter needs to be installed, the withdrawing device is detached from the first reduction gearbox and upwards withdrawn, the long connecting rod is detached, the short connecting rod is replaced, the broach jaw, the main shaft rivet and the main shaft taper shank are installed, and then the numerical control cutter can be installed. The withdrawing device is used as a tool loosening and clamping mechanism, and can control the servo motor to output constant torque force to pull the numerical control tool to a fixed coordinate point and then stop, so that tool pulling is completed. And after the broaching tool is finished, the servo motor is switched off, the main motor works, torque is transmitted to the main shaft through the first transmission mechanism, the main shaft is driven to rotate, and the numerical control machining operation on the workpiece is finished.
Therefore, the multi-purpose spindle structure can be used as friction welding equipment and a numerical control machining center. The friction welding device is simple in structure, rapid and flexible conversion between the friction welding device and the numerical control machining center can be achieved through simple transformation, the application range of the device is greatly expanded, the requirement of one machine with multiple purposes of a user can be met, and the purchase cost of the device is greatly saved. The drawing-back device is driven by a servo motor, can be used as a servo shaft or a unclamping knife mechanism to perform short-distance drawing action, has high positioning speed and accurate positioning of the servo motor, and can realize high-precision positioning of the connecting rod and accurate control of the coordinate position of the stirring pin.
The multi-purpose main shaft structure has the advantages that the pumping-back device is in an electric cylinder form, is driven by the servo motor, does not need hydraulic driving, can avoid the safety problems of hydraulic oil leakage and the like, avoids the design and use of a complex complete system comprising a pump, a pipeline, an electromagnetic valve, a pressure switch, a joint and the like, simplifies an equipment control system, and is convenient for later equipment maintenance. The multi-purpose main shaft structure can avoid oil pollution of equipment and save the cleaning cost of some special parts.
The electric cylinder with the connecting rod pass through second drive mechanism detachably and connect, second drive mechanism include transmission cover, lower transmission cover, first lock nut and tapered roller bearing, last transmission cover fix the output of electric cylinder, lower transmission cover pass through the fix with screw the lower extreme of last transmission cover, tapered roller bearing install lower transmission cover with the connecting rod between, first lock nut install the upper end of connecting rod, tapered roller bearing by first lock nut lock. When the connecting rod is disassembled, the upper transmission sleeve is separated from the lower transmission sleeve, and the connecting rod can be disassembled and drawn out by taking down the first locking nut, so that the operation is convenient.
The electric cylinder is installed on a transition support, the lower end of the transition support is provided with a transition sleeve with a downward opening, the transition sleeve is sleeved on the upper transmission sleeve, the upper transmission sleeve is in threaded connection with the output end of the electric cylinder, the upper transmission sleeve is locked by a second locking nut, the second locking nut is fixed on the upper transmission sleeve through a screw, the lower end of the transition support is fixedly provided with a transmission case through a screw, the transmission case is fixed on the first reduction gearbox through a screw, and the upper end of the connecting rod extends into the transmission case.
And an adjusting pad is arranged between the upper transmission sleeve and the lower transmission sleeve so as to adjust the pre-pressing amount of the outer ring of the tapered roller bearing.
The first transmission mechanism comprises a first gear shaft, a second gear shaft, an output shaft, a first transmission gear and a second transmission gear, the first gear shaft, the second gear shaft and the output shaft are sequentially arranged in parallel, the output end of the main motor is connected with the first gear shaft, the first transmission gear is installed on the second gear shaft, the second transmission gear is installed on the output shaft, the first gear shaft is meshed with the first transmission gear, the first transmission gear is meshed with the second transmission gear, the output shaft is sleeved on the connecting rod and is in key connection with the connecting rod, and the bottom end of the output shaft is connected with the top end of the main shaft up and down through a spline sleeve. When the pumping device works, the main motor drives the first gear shaft to rotate, so that the second gear shaft and the output shaft are driven to rotate, the second gear shaft can increase the center distance between the first gear shaft and the output shaft, and enough installation space is reserved for the pumping device. The output shaft is used for reducing the speed and increasing the output torque of the main motor.
The lower end of the main shaft is provided with a taper hole, and the taper hole is matched with the friction welding tool shank or the main shaft taper shank.
Compared with the prior art, the invention has the advantages that:
1. the multipurpose main shaft structure disclosed by the invention can be used as friction welding equipment and a numerical control machining center. The friction welding device is simple in structure, rapid and flexible conversion between the friction welding device and the numerical control machining center can be achieved through simple transformation, the application range of the device is greatly expanded, the requirement of one machine with multiple purposes of a user can be met, and the purchase cost of the device is greatly saved.
2. The multi-purpose spindle structure disclosed by the invention has the advantages that the withdrawing device is driven by the servo motor, can be used as a servo shaft or a unclamping cutter mechanism to perform short-distance drawing action, the positioning speed of the servo motor is high, the positioning is accurate, the high-precision positioning of the connecting rod can be realized, and the coordinate position of the stirring needle can be accurately controlled.
3. The pumpback device of the multipurpose spindle structure disclosed by the invention adopts an electric cylinder form, is driven by a servo motor, does not need hydraulic drive, can avoid the safety problems of hydraulic oil leakage and the like, avoids the design and use of a complex complete system comprising a pump, a pipeline, an electromagnetic valve, a pressure switch, a joint and the like, simplifies an equipment control system, and is convenient for later equipment maintenance. The multi-purpose main shaft structure can avoid oil pollution of equipment and save the cleaning cost of some special parts.
Drawings
FIG. 1 is a schematic structural view of a back-pumping type stirring head;
FIG. 2 is a schematic structural diagram of a multi-purpose spindle structure according to an embodiment;
FIG. 3 is an enlarged view taken at A in FIG. 2;
FIG. 4 is a schematic view showing the construction of a suction device in the embodiment;
FIG. 5 is a schematic structural connection diagram of a first transmission mechanism in the embodiment;
FIG. 6 is a schematic view showing the structure of the lower end of the main shaft structure in example 1;
fig. 7 is a schematic structural view of the lower end of the spindle structure in embodiment 2.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The multi-purpose spindle structure of embodiment 1, as shown in the figure, includes a spindle 2, a main motor 1, a first transmission mechanism and a drawing back device, an output end of the main motor 1 is connected to an input end of the first transmission mechanism, the spindle 2 is connected to an output end of the first transmission mechanism, the first transmission mechanism is installed in a first reduction gearbox 22, the spindle 2 is vertically installed in a spindle box 23, an axial through hole 21 is formed in the spindle 2, the drawing back device is detachably installed on the first reduction gearbox 22, the spindle box 23 is fixed at a lower end of the first reduction gearbox 22, the drawing back device includes a servo motor 31, a second reduction gearbox 32 and an electric cylinder 33 which are vertically arranged, an output end of the servo motor 31 is connected to an input end of the second reduction gearbox 32, an output end of the second reduction gearbox 32 is connected to an input end of the electric cylinder 33, an output end of the electric cylinder 33 is detachably connected to a connecting rod 4 through the second transmission mechanism, the connecting rod 4 penetrates through the axial through hole 21, the connecting rod 4 is a long connecting rod, a friction welding tool shank 5 is installed at the bottom end of the long connecting rod, the friction welding tool shank 5 is fixed on the main shaft 2, a stirring pin 51 and a stirring head 52 are installed in the friction welding tool shank 5, the stirring pin 51 is fixed at the bottom end of the long connecting rod, and the stirring head 52 is sleeved on the stirring pin 51; the lower end of the main shaft 2 is provided with a taper hole 24, and the taper hole 24 is matched with the friction welding tool shank 5.
In embodiment 1, the first transmission mechanism includes a first gear shaft 61, a second gear shaft 62, an output shaft 63, a first transmission gear 64 and a second transmission gear 65, the first gear shaft 61, the second gear shaft 62 and the output shaft 63 are sequentially arranged in parallel, the output end of the main motor 1 is connected with the first gear shaft 61, the first transmission gear 64 is installed on the second gear shaft 62, the second transmission gear 65 is installed on the output shaft 63, the first gear shaft 61 is meshed with the first transmission gear 64, the first transmission gear 64 is meshed with the second transmission gear 65, the output shaft 63 is sleeved on the connecting rod 4 and is connected with the connecting rod 4 in a key manner, and the bottom end of the output shaft 63 is connected with the top end of the main shaft 2 up and down through a spline housing 66.
In embodiment 1, the second transmission mechanism includes an upper transmission sleeve 71, a lower transmission sleeve 72, a first lock nut 73, and a tapered roller bearing 74, the upper transmission sleeve 71 is fixed at the output end of the electric cylinder 33, the lower transmission sleeve 72 is fixed at the lower end of the upper transmission sleeve 71 by a screw, an adjusting pad 75 is installed between the upper transmission sleeve 71 and the lower transmission sleeve 72, the tapered roller bearing 74 is installed between the lower transmission sleeve 72 and the connecting rod 4, the first lock nut 73 is installed at the upper end of the connecting rod 4, and the tapered roller bearing 74 is locked by the first lock nut 73.
In embodiment 1, the electric cylinder 33 is installed on a transition support 34, the lower end of the transition support 34 is installed with a transition sleeve 35 with a downward opening, the transition sleeve 35 is sleeved on the upper transmission sleeve 71, the upper transmission sleeve 71 is in threaded connection with the output end of the electric cylinder 33, the upper transmission sleeve 71 is locked by a second locking nut 76, the second locking nut 76 is fixed on the upper transmission sleeve 71 through a screw, the lower end of the transition support 34 is fixed with a transmission case 36 through a screw, the transmission case 36 is fixed on the first reduction gearbox 22 through a screw, and the upper end of the connecting rod 4 extends into the transmission case 36.
The working principle of the multipurpose spindle structure of embodiment 1 is as follows: the servo motor 31 drives the electric cylinder 33 after increasing the torque through the second reduction gearbox 32, the electric cylinder 33 transmits the torque to the connecting rod 4, the axial telescopic action of the connecting rod 4 is completed by utilizing the forward rotation and the reverse rotation of the servo motor 31, the position of the stirring pin 51 at the welding seam is adjusted through the axial telescopic action of the connecting rod 4, after the stirring pin 51 reaches a proper position, the servo motor 31 stops working, then the main motor 1 works, the main motor 1 drives the first gear shaft 61 to rotate, then the second gear shaft 62 and the output shaft 63 are driven to rotate, the output shaft 63 drives the main shaft 2 to rotate, and then the friction welding action is completed.
The second gear shaft 62 can increase the center distance between the first gear shaft 61 and the output shaft 63, leaving enough installation space for the retraction device, and the output shaft 63 is used for reducing the speed and increasing the output torque of the main motor 1.
The multi-purpose spindle structure of embodiment 2, as shown in the figure, includes a spindle 2, a main motor 1, a first transmission mechanism and a drawing back device, an output end of the main motor 1 is connected to an input end of the first transmission mechanism, the spindle 2 is connected to an output end of the first transmission mechanism, the first transmission mechanism is installed in a first reduction gearbox 22, the spindle 2 is vertically installed in a spindle box 23, an axial through hole 21 is formed in the spindle 2, the drawing back device is detachably installed on the first reduction gearbox 22, the spindle box 23 is fixed at a lower end of the first reduction gearbox 22, the drawing back device includes a servo motor 31, a second reduction gearbox 32 and an electric cylinder 33 which are vertically arranged, an output end of the servo motor 31 is connected to an input end of the second reduction gearbox 32, an output end of the second reduction gearbox 32 is connected to an input end of the electric cylinder 33, an output end of the electric cylinder 33 is detachably connected to a connecting rod 4 through the second transmission mechanism, the connecting rod 4 penetrates through the axial through hole 21, the connecting rod 4 is a short connecting rod, a broach claw 81 is installed at the bottom end of the short connecting rod, a main shaft taper shank 8 is installed at the lower end of the main shaft 2, a main shaft blind rivet 82 is fixed at the upper end of the main shaft taper shank 8, the main shaft blind rivet 82 is connected with the broach claw 81, and the main shaft taper shank 8 is used for installing a numerical control cutter; the lower end of the main shaft 2 is provided with a taper hole 24, and the taper hole 24 is matched with the main shaft taper shank 8.
In embodiment 2, the first transmission mechanism includes a first gear shaft 61, a second gear shaft 62, an output shaft 63, a first transmission gear 64 and a second transmission gear 65, the first gear shaft 61, the second gear shaft 62 and the output shaft 63 are sequentially arranged in parallel, the output end of the main motor 1 is connected with the first gear shaft 61, the first transmission gear 64 is installed on the second gear shaft 62, the second transmission gear 65 is installed on the output shaft 63, the first gear shaft 61 is meshed with the first transmission gear 64, the first transmission gear 64 is meshed with the second transmission gear 65, the output shaft 63 is sleeved on the connecting rod 4 and is connected with the connecting rod 4 in a key manner, and the bottom end of the output shaft 63 is connected with the top end of the main shaft 2 up and down through a spline housing 66.
In embodiment 2, the second transmission mechanism includes an upper transmission sleeve 71, a lower transmission sleeve 72, a first lock nut 73, and a tapered roller bearing 74, the upper transmission sleeve 71 is fixed at the output end of the electric cylinder 33, the lower transmission sleeve 72 is fixed at the lower end of the upper transmission sleeve 71 by a screw, an adjusting pad 75 is installed between the upper transmission sleeve 71 and the lower transmission sleeve 72, the tapered roller bearing 74 is installed between the lower transmission sleeve 72 and the connecting rod 4, the first lock nut 73 is installed at the upper end of the connecting rod 4, and the tapered roller bearing 74 is locked by the first lock nut 73.
In embodiment 2, the electric cylinder 33 is installed on a transition support 34, the lower end of the transition support 34 is installed with a transition sleeve 35 with a downward opening, the transition sleeve 35 is sleeved on the upper transmission sleeve 71, the upper transmission sleeve 71 is in threaded connection with the output end of the electric cylinder 33, the upper transmission sleeve 71 is locked by a second locking nut 76, the second locking nut 76 is fixed on the upper transmission sleeve 71 through a screw, the lower end of the transition support 34 is fixed with a transmission case 36 through a screw, the transmission case 36 is fixed on the first reduction gearbox 22 through a screw, and the upper end of the connecting rod 4 extends into the transmission case 36.
The working principle of the multi-purpose spindle structure of embodiment 2 is as follows: the servo motor 31 drives the electric cylinder 33 after increasing the torque through the second reduction gearbox 32, the electric cylinder 33 transmits the torque to the connecting rod 4, the axial telescopic action of the connecting rod 4 is completed by utilizing the forward and reverse rotation of the servo motor 31, the function of loosening and clamping the cutter is realized through the axial telescopic action of the connecting rod 4, and the withdrawing device at the moment is used as a mechanism for loosening and clamping the cutter. The constant torque force output by the servo motor 31 pulls the numerical control cutter to a fixed coordinate point and then stops, and the cutter pulling action is completed. After the broaching, the servo motor 31 is turned off, the main motor 1 works, the main motor 1 drives the first gear shaft 61 to rotate, further drives the second gear shaft 62 and the output shaft 63 to rotate, transmits torque to the main shaft 2, drives the main shaft 2 to rotate, and completes numerical control machining operation on a workpiece.
The spindle structure of embodiment 1 is friction stir welding equipment, and the spindle structure of embodiment 2 is numerical control machining center, through changing connecting rod 4, can realize friction stir welding equipment and numerical control machining center's quick, nimble conversion, can expand the range of application of equipment, satisfies the requirement that a user a tractor serves several purposes, practices thrift equipment purchase cost by a wide margin.
For example, in the current friction stir welding equipment, if the equipment needs to be converted into a numerical control machining center, the specific conversion process is as follows: the drawing-back device is disassembled from the first reduction gearbox 22 and upwards drawn out, when the connecting rod 4 is disassembled, the upper transmission sleeve 71 is separated from the lower transmission sleeve 72, the first lock nut 73 is taken down to disassemble and draw out the connecting rod 4, the short connecting rod is replaced, the broach jaws 81, the main shaft rivet 82 and the main shaft taper shank 8 are installed, the numerical control cutter can be installed, and at the moment, the multi-purpose main shaft structure is reformed into a machining center capable of clamping a standard numerical control cutter.
In the above embodiment, the servo motor 31 can be a siemens 1FK7060-2AF71-1RH1 type motor, and the electric cylinder can be a product of Suzhou Fengdui, with a speed ratio of 25:1, a lead of 10mm and a stroke of 20 mm.
Therefore, the multi-purpose spindle structure disclosed by the invention can be used as friction welding equipment and a numerical control machining center. The drawing device is driven by a servo motor, can be used as a servo shaft or a loosening and clamping cutter mechanism to perform short-distance drawing action, is high in positioning speed and accurate in positioning, can realize high-precision positioning of the connecting rod, accurately controls the coordinate position of the stirring needle, and plays a role in tensioning the cutter when a numerical control cutter is installed. In addition, the pumping-back device adopts an electric cylinder form, is driven by a servo motor, does not need hydraulic drive, and can avoid safety problems such as hydraulic oil leakage and the like. The multipurpose main shaft structure disclosed by the invention is simple in structure, and can realize quick and flexible conversion between the friction welding equipment and the numerical control machining center through simple transformation, thereby greatly expanding the application range of the equipment, meeting the requirement of one machine for multiple purposes of a user and greatly saving the purchase cost of the equipment.

Claims (6)

1. A multipurpose spindle structure is characterized by comprising a spindle, a main motor, a first transmission mechanism and a withdrawing device, wherein the output end of the main motor is connected with the input end of the first transmission mechanism, the spindle is connected with the output end of the first transmission mechanism, the first transmission mechanism is installed in a first reduction gearbox, the spindle is vertically installed in a spindle box body, an axial through hole is formed in the spindle, the withdrawing device is detachably installed on the first reduction gearbox, the spindle box body is fixed at the lower end of the first reduction gearbox, the withdrawing device comprises a servo motor, a second reduction gearbox and an electric cylinder which are vertically arranged, the output end of the servo motor is connected with the input end of the second reduction gearbox, the output end of the second reduction gearbox is connected with the input end of the electric cylinder, the output end of the electric cylinder is detachably connected with a connecting rod, the connecting rod penetrates through the axial through hole and is arranged, the connecting rod is a long connecting rod or a short connecting rod, a friction welding tool handle is installed at the bottom end of the long connecting rod and is fixed on the main shaft, a stirring needle and a stirring head are installed in the friction welding tool handle, the stirring needle is fixed at the bottom end of the long connecting rod, and the stirring head is sleeved on the stirring needle; the bottom end of the short connecting rod is provided with a broach claw, the lower end of the main shaft is provided with a main shaft taper shank, the upper end of the main shaft taper shank is fixed with a main shaft blind rivet, the main shaft blind rivet is connected with the broach claw, and the main shaft taper shank is used for installing a numerical control cutter.
2. The multipurpose spindle structure according to claim 1, wherein the electric cylinder is detachably connected to the connecting rod through a second transmission mechanism, the second transmission mechanism includes an upper transmission sleeve, a lower transmission sleeve, a first locking nut, and a tapered roller bearing, the upper transmission sleeve is fixed to an output end of the electric cylinder, the lower transmission sleeve is fixed to a lower end of the upper transmission sleeve through a screw, the tapered roller bearing is installed between the lower transmission sleeve and the connecting rod, the first locking nut is installed at an upper end of the connecting rod, and the tapered roller bearing is locked by the first locking nut.
3. The multipurpose spindle structure according to claim 2, wherein the electric cylinder is mounted on a transition support, a transition sleeve with a downward opening is mounted at the lower end of the transition support, the transition sleeve is sleeved on the upper transmission sleeve, the upper transmission sleeve is in threaded connection with the output end of the electric cylinder, the upper transmission sleeve is locked by a second locking nut, the second locking nut is fixed on the upper transmission sleeve through a screw, the lower end of the transition support is fixed with a transmission case through a screw, the transmission case is fixed on the first reduction gearbox through a screw, and the upper end of the connecting rod extends into the transmission case.
4. A multi-purpose spindle structure according to claim 2, wherein an adjustment pad is mounted between the upper and lower drive sleeves.
5. The multipurpose spindle structure according to claim 1, wherein the first transmission mechanism includes a first gear shaft, a second gear shaft, an output shaft, a first transmission gear and a second transmission gear, the first gear shaft, the second gear shaft and the output shaft are arranged in parallel in sequence, the output end of the main motor is connected with the first gear shaft, the first transmission gear is arranged on the second gear shaft, the second transmission gear is arranged on the output shaft, the first gear shaft is meshed with the first transmission gear, the first transmission gear is meshed with the second transmission gear, the output shaft is sleeved on the connecting rod and connected with the connecting rod in a key mode, and the bottom end of the output shaft is connected with the top end of the main shaft up and down through a spline sleeve.
6. The multipurpose spindle structure according to claim 1, wherein a taper hole is formed at a lower end of the spindle, and the taper hole is matched with the friction welding tool shank or the spindle taper shank.
CN201710187378.0A 2017-03-27 2017-03-27 Multipurpose main shaft structure Active CN106891089B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108746984B (en) * 2018-06-08 2020-11-06 河北科技大学 Built-in cooling friction stir welding device
TWI761949B (en) * 2020-09-14 2022-04-21 喬崴進科技股份有限公司 Friction stir welding adapter and tool holder having a spindle torque transmission system
CN112453681B (en) * 2020-10-22 2022-06-14 北京工业大学 Retractable friction stir welding electric spindle

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