CN105965151A - V-shaped thrust rod for phase position friction welding automobile and welding method for V-shaped thrust rod - Google Patents

V-shaped thrust rod for phase position friction welding automobile and welding method for V-shaped thrust rod Download PDF

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Publication number
CN105965151A
CN105965151A CN201610480151.0A CN201610480151A CN105965151A CN 105965151 A CN105965151 A CN 105965151A CN 201610480151 A CN201610480151 A CN 201610480151A CN 105965151 A CN105965151 A CN 105965151A
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CN
China
Prior art keywords
earrings
pipe
welding
friction welding
weld bond
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610480151.0A
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Chinese (zh)
Inventor
邱凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harbin Zhengchen Welding & Cutting Devices Manufacturer Corp Co Ltd
Original Assignee
Harbin Zhengchen Welding & Cutting Devices Manufacturer Corp Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Harbin Zhengchen Welding & Cutting Devices Manufacturer Corp Co Ltd filed Critical Harbin Zhengchen Welding & Cutting Devices Manufacturer Corp Co Ltd
Priority to CN201610480151.0A priority Critical patent/CN105965151A/en
Publication of CN105965151A publication Critical patent/CN105965151A/en
Pending legal-status Critical Current

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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
    • 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
    • B23K20/126Workpiece support, i.e. backing or clamping
    • 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
    • B23K33/00Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
    • B23K33/004Filling of continuous seams
    • B23K33/008Filling of continuous seams for automotive applications
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60GVEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00Pivoted suspension arms; Accessories thereof
    • 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
    • B23K2101/00Articles made by soldering, welding or cutting
    • B23K2101/006Vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

The invention discloses a V-shaped thrust rod for a phase position friction welding automobile and a welding method for the V-shaped thrust rod. One end of a first round pipe is welded to a first straight lug ring, and the other end of the first round pipe is welded to one branch end of a V-shaped lug ring. One end of a second round pipe is welded to a second straight lug ring, and the other end of the second round pipe is welded to the other branch end of the V-shaped lug ring. The first straight lug ring is placed in a rotation clamp of a double-head phase position friction welding machine clamped by a single-spindle box at a time to be clamped, the first round pipe is placed in an opposite-opening jaw of the friction welding machine, and the V-shaped lug ring is placed in a tail fixing clamp of the friction welding machine. After a weld opening between the first round pipe and the first straight lug ring is welded, the opposite-opening jaw is opened, a center frame is clamped, and the first round pipe is made to rotate. A spindle rotates to weld the part between the first round pipe and one branch end of the V-shaped lug ring, the first step is repeated, the V-shaped lug ring is vertically rotated by 180 degrees to be placed in the tail fixing clamp, then, the second round pipe and the second straight lug ring are welded, and finally, the second round pipe and the V-shaped lug ring are welded.

Description

A kind of phase friction welding connects automobile V-type distance rod and welding method thereof
Technical field
The present invention relates to a kind of phase friction welding and connect automobile V-type distance rod and welding method thereof, belong to V-type distance rod and Its welding method technical field.
Background technology
Based on thermo-compressed in automobile distance rod product processing technique, propulsion rod joint machine is added to anti-back slot, then will Heating-pressure-molding implemented on hot press by joint and inboard wall of tube body adapting device, this processes cycle length, cost High, finished product distance rod weight big, increases invisible burden to vehicle, and loosening easily occurs in life-time service, ask button etc. seriously Problem (see Fig. 1).In development in science and technology, the extensively application of friction-welding machine solved disadvantage mentioned above later.But can only meet Straight distance rod needs (see Fig. 2) with the production of oblique thrust bar, due to the structural particularity of V-type distance rod, so still from Do not open thermo-compressed technique, then, processes cycle length, cost are high, finished product distance rod weight is big, increase nothing to vehicle Shape is born, and loosening easily occurs in life-time service, ask the serious problems such as button to be still not able to completely solves.
Summary of the invention
The invention aims to solve the problem that above-mentioned prior art exists, i.e. special due to the structure of V-type distance rod Property, still it be unable to do without thermo-compressed technique, so, processes cycle length, cost are high, finished product distance rod weight is big, give Vehicle increases invisible burden, and loosening easily occurs in life-time service, ask the serious problems such as button to be still not able to completely solves Certainly.And then provide a kind of phase friction welding to connect automobile V-type distance rod and welding method thereof.
It is an object of the invention to be achieved through the following technical solutions:
A kind of phase friction welding connects automobile V-type distance rod, including: V-arrangement earrings, the first pipe, the first straight earrings, Second pipe and the second straight earrings, between one end of described first pipe and the first straight earrings, phase friction welding connects formation first Weld bond, between the other end and a branch end of V-arrangement earrings of the first pipe, phase friction welding connects formation the second weld bond, the Between one end of two pipes and the second straight earrings, phase friction welding connects formation the 3rd weld bond, the other end of the second pipe and V-arrangement Between another branch end of earrings, phase friction welding connects formation the 4th weld bond.
A kind of phase friction welding connects the welding method of automobile V-type distance rod,
Step one: the first straight earrings is put in the rolling clamp of the dual-head phase friction welding machine that single main spindle box is once installed and press from both sides Tightly, the first pipe is put in the opposite opened jaw of described dual-head phase friction welding machine, V-arrangement earrings is put into described double end In the afterbody stationary fixture of phase friction welding machine.
Step 2: after first welding the first weld bond between the first pipe and the first straight earrings, opposite opened jaw is opened, center Frame clamps so that the first pipe rotates.
Step 3: subsequent steps two, main shaft rotates and welding between the first pipe and a branch end of V-arrangement earrings is referred to as Second weld bond, repeats step one, V-arrangement earrings revolves turnback up and down and puts in afterbody stationary fixture, then weld The 3rd weld bond between second pipe and the second straight earrings, finally welds another branch end of the second pipe and V-arrangement earrings The 4th weld bond, thus complete four weld bond all phase friction weldings of V-type distance rod.
The present invention uses the dual-head phase friction welding machine that single main spindle box is once installed so that automobile uses complete with V-type distance rod Friction-welding technique, and filled up domestic and international automobile V-type distance rod and can not all use the blank of friction welding.Make Its processing technique is simple, huge reduces manufacturing cost, improves production efficiency, and the work reducing operator is strong Degree.We are also in friction welding process, for automobile with V-type distance rod adjust the pressure of welding procedure, the time and turn Speed so that it is postwelding precision has exceeded thermo-compressed, after the body of rod and weld, intensity is also above the intensity of mother metal self, simultaneously Alleviate the own wt of automobile V-type distance rod, the consumption of fuel can be reduced for vehicle.
In the welding method of the present invention, two straight earrings and two pipes, two pipes and the phase friction welding of V-arrangement earrings Connecing, relatively rotate frictional heat plasticizing deformation upset and form firmly connection, welding process produces without harmful gas, is solderless A kind of green, environmental protection, the efficient welding manner of wire bond agent.
Accompanying drawing explanation
Fig. 1 is the structural representation of the automobile V-type distance rod of thermo-compressed.
Fig. 2 is the structural representation of the automobile V-type distance rod of friction welding (FW) and thermo-compressed.
Fig. 3 is the structural representation that phase friction welding of the present invention connects automobile V-type distance rod.
Reference in Fig. 3,1 is V-arrangement earrings, and 2 is the first pipe, and 3 is the first straight earrings, and 4 is the second pipe, 5 is the second straight earrings, and 6 is the first weld bond, and 7 is the second weld bond, and 8 is the 3rd weld bond, and 9 is the 4th weld bond.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail: the present embodiment is being front with technical solution of the present invention Put and implement, give detailed embodiment, but protection scope of the present invention is not limited to following embodiment.
As it is shown on figure 3, a kind of phase friction welding involved by the present embodiment connects automobile V-type distance rod, including: V-arrangement ear Ring the 1, first pipe 2, first straight earrings the 3, second pipe 4 and the second straight earrings 5, one end of described first pipe 2 and the Between earrings 3, phase friction welding connects formation the first weld bond 6, the other end of the first pipe 2 and one point of V-arrangement earrings 1 always Between Zhi Duan, phase friction welding connects formation the second weld bond 7, phase place friction between one end of the second pipe 4 and the second straight earrings 5 Welding forms the 3rd weld bond 8, phase friction welding between the other end and another branch end of V-arrangement earrings 1 of the second pipe 4 Connect formation the 4th weld bond 9.
Angle between described first pipe 2 and the second pipe 4 is 55 °~65 °.
The welding method that the present embodiment phase friction welding connects automobile V-type distance rod is as follows:
Step one: the first straight earrings 3 is put in the rolling clamp of the dual-head phase friction welding machine that single main spindle box is once installed Clamping, puts in the opposite opened jaw of described dual-head phase friction welding machine by the first pipe 2, is put into by V-arrangement earrings 1 described In the afterbody stationary fixture of dual-head phase friction welding machine.
Step 2: after first welding the first weld bond 6 between the first pipe 2 and the first straight earrings 3, opposite opened jaw is opened, Centre frame clamps so that the first pipe 2 rotates.
Step 3: subsequent steps two, main shaft rotates and welding between the first pipe 2 and a branch end of V-arrangement earrings 1 is claimed It is the second weld bond 7, repeats step one, V-arrangement earrings about 1 rotation turnback is put in afterbody stationary fixture, then Weld the 3rd weld bond 8 between the second pipe 4 and the second straight earrings 5, finally weld the another of the second pipe 4 and V-arrangement earrings 1 4th weld bond 9 of one branch end, thus complete four weld bond all phase friction weldings of V-type distance rod.
Described first weld bond the 6, second weld bond the 7, the 3rd weld bond 8 and the 4th weld bond 9 all through one-level welding, two grades welding and Upset weld, with bonding area calculate, one-level weld the welding pressure of every square millimeter be 2~4MPa, weld interval be 6~10 seconds;Two grades of welding pressures are 4~8MPa, weld interval is 6~8 seconds;Upset welding pressure be 14MPa, welding time Between be 6 seconds.
Two straight earrings and two pipes, the phase friction welding of two pipes and V-arrangement earrings connects, and relatively rotates frictional heat Plasticizing deformation upset forms firmly connection, and welding process produces without harmful gas, is a kind of green, the ring without wire welding agent Guarantor, efficient welding manner.
The dual-head phase friction welding machine that single main spindle box that the present embodiment is used once is installed, its China's Patent No. ZL201310484375.5, Authorization Notice No. is CN103521914B, and authorized announcement date is on April 13rd, 2016.
The above, the only present invention preferably detailed description of the invention, it is whole that these detailed description of the invention are all based on the present invention Different implementations under body design, and protection scope of the present invention is not limited thereto, and any is familiar with the art Technical staff in the technical scope that the invention discloses, the change that can readily occur in or replacement, all should contain in the present invention Protection domain within.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.

Claims (4)

1. phase friction welding connects an automobile V-type distance rod, including: V-arrangement earrings (1), the first pipe (2), First straight earrings (3), the second pipe (4) and the second straight earrings (5), it is characterised in that described first pipe (2) between one end and the first straight earrings (3), phase friction welding connects formation the first weld bond (6), the first pipe (2) The other end and a branch end of V-arrangement earrings (1) between phase friction welding connect formation the second weld bond (7), second circle Between one end and the second straight earrings (5) of pipe (4), phase friction welding connects formation the 3rd weld bond (8), the second pipe (4) between the other end and another branch end of V-arrangement earrings (1), phase friction welding connects formation the 4th weld bond (9)。
Phase friction welding the most according to claim 1 connects automobile V-type distance rod, it is characterised in that described first Angle between pipe (2) and the second pipe (4) is 55 °~65 °.
3. the phase friction welding described in claim 1 connects a welding method for automobile V-type distance rod, and its feature exists In,
Step one: the first straight earrings (3) is put into the rotating clamp of the dual-head phase friction welding machine that single main spindle box is once installed Tool clamps, the first pipe (2) is put in the opposite opened jaw of described dual-head phase friction welding machine, by V-arrangement earrings (1) put in the afterbody stationary fixture of described dual-head phase friction welding machine;
Step 2: after first welding the first weld bond (6) between the first pipe (2) and the first straight earrings (3), split Formula jaw is opened, and centre frame clamps so that the first pipe (2) rotates;
Step 3: subsequent steps two, main shaft rotate by a branch end of the first pipe (2) and V-arrangement earrings (1) it Between welding be referred to as the second weld bond (7), repeat step one, V-arrangement earrings (1) revolved up and down turnback and puts into afterbody In stationary fixture, then weld the 3rd weld bond (8) between the second pipe (4) and the second straight earrings (5), finally Weld the 4th weld bond (9) of another branch end of the second pipe (4) and V-arrangement earrings (1), thus complete V-type and push away Four weld bond all phase friction weldings of power bar.
Phase friction welding the most according to claim 3 connects the welding method of automobile V-type distance rod, and its feature exists In, described first weld bond (6), the second weld bond (7), the 3rd weld bond (8) and the 4th weld bond (9) are all through one Level welding, two grades of welding and upset welding, calculate with bonding area, and one-level is welded the welding pressure of every square millimeter and is 2~4MPa, weld interval is 6~10 seconds;Two grades of welding pressures are 4~8MPa, weld interval is 6~8 seconds;Upset welds Pressure is 14MPa, weld interval is 6 seconds.
CN201610480151.0A 2016-06-27 2016-06-27 V-shaped thrust rod for phase position friction welding automobile and welding method for V-shaped thrust rod Pending CN105965151A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110525153A (en) * 2019-08-23 2019-12-03 福建龙溪轴承(集团)股份有限公司 The connection method of propulsion rod joint, straight type distance rod and V-type distance rod
CN111451722A (en) * 2020-03-27 2020-07-28 朱增 Metal pipe fitting processing method
CN111907277A (en) * 2020-07-20 2020-11-10 东风商用车有限公司 Manufacturing method of straight thrust rod and straight thrust rod

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01133691A (en) * 1987-11-18 1989-05-25 Chiyoda Corp Friction welding machine
CN2621964Y (en) * 2003-05-26 2004-06-30 中国重型汽车集团有限公司 Automatic suspension guide push rod
CN201077334Y (en) * 2007-01-31 2008-06-25 株洲时代新材料科技股份有限公司 V-shaped thrust rod for automobile suspension
CN101417368A (en) * 2007-10-26 2009-04-29 汉中双戟摩擦焊接制造技术有限责任公司 'Two-head' phase friction welding method of 'two-head' welding element
CN101417367A (en) * 2007-10-26 2009-04-29 汉中双戟摩擦焊接制造技术有限责任公司 'Two-head' phase control friction-welding machine
CN202185674U (en) * 2011-07-04 2012-04-11 东北林业大学 Linear displacement control system for dual-head phase friction welding machine
CN203046789U (en) * 2013-01-10 2013-07-10 山东美晨科技股份有限公司 New-technology V-shaped thrust rod
CN103521914A (en) * 2013-10-16 2014-01-22 哈尔滨正晨焊接切割设备制造有限公司 Single-main-shaft box one-time clamping double-end phase friction welder
CN205292171U (en) * 2016-01-06 2016-06-08 中国重汽集团济南动力有限公司 V type distance rod assembly
CN205292172U (en) * 2016-01-13 2016-06-08 中国重汽集团济南动力有限公司 A asymmetric V type distance rod assembly for truck
CN105667234A (en) * 2015-12-30 2016-06-15 陕西德仕汽车部件(集团)有限责任公司 Automobile thrust rod
CN205733422U (en) * 2016-06-27 2016-11-30 哈尔滨正晨焊接切割设备制造有限公司 A kind of phase friction welding connects automobile V-type distance rod

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01133691A (en) * 1987-11-18 1989-05-25 Chiyoda Corp Friction welding machine
CN2621964Y (en) * 2003-05-26 2004-06-30 中国重型汽车集团有限公司 Automatic suspension guide push rod
CN201077334Y (en) * 2007-01-31 2008-06-25 株洲时代新材料科技股份有限公司 V-shaped thrust rod for automobile suspension
CN101417368A (en) * 2007-10-26 2009-04-29 汉中双戟摩擦焊接制造技术有限责任公司 'Two-head' phase friction welding method of 'two-head' welding element
CN101417367A (en) * 2007-10-26 2009-04-29 汉中双戟摩擦焊接制造技术有限责任公司 'Two-head' phase control friction-welding machine
CN202185674U (en) * 2011-07-04 2012-04-11 东北林业大学 Linear displacement control system for dual-head phase friction welding machine
CN203046789U (en) * 2013-01-10 2013-07-10 山东美晨科技股份有限公司 New-technology V-shaped thrust rod
CN103521914A (en) * 2013-10-16 2014-01-22 哈尔滨正晨焊接切割设备制造有限公司 Single-main-shaft box one-time clamping double-end phase friction welder
CN105667234A (en) * 2015-12-30 2016-06-15 陕西德仕汽车部件(集团)有限责任公司 Automobile thrust rod
CN205292171U (en) * 2016-01-06 2016-06-08 中国重汽集团济南动力有限公司 V type distance rod assembly
CN205292172U (en) * 2016-01-13 2016-06-08 中国重汽集团济南动力有限公司 A asymmetric V type distance rod assembly for truck
CN205733422U (en) * 2016-06-27 2016-11-30 哈尔滨正晨焊接切割设备制造有限公司 A kind of phase friction welding connects automobile V-type distance rod

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110525153A (en) * 2019-08-23 2019-12-03 福建龙溪轴承(集团)股份有限公司 The connection method of propulsion rod joint, straight type distance rod and V-type distance rod
CN110525153B (en) * 2019-08-23 2022-09-16 福建龙溪轴承(集团)股份有限公司 Connection method of thrust rod joint, straight thrust rod and V-shaped thrust rod
CN111451722A (en) * 2020-03-27 2020-07-28 朱增 Metal pipe fitting processing method
CN111907277A (en) * 2020-07-20 2020-11-10 东风商用车有限公司 Manufacturing method of straight thrust rod and straight thrust rod

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