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CN201423426Y - Riveting and totally assembling fixture of vehicle frame - Google Patents

Riveting and totally assembling fixture of vehicle frame Download PDF

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Publication number
CN201423426Y
CN201423426Y CN2009200852398U CN200920085239U CN201423426Y CN 201423426 Y CN201423426 Y CN 201423426Y CN 2009200852398 U CN2009200852398 U CN 2009200852398U CN 200920085239 U CN200920085239 U CN 200920085239U CN 201423426 Y CN201423426 Y CN 201423426Y
Authority
CN
China
Prior art keywords
vehicle frame
slide block
base
assembly clamping
total
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.)
Expired - Lifetime
Application number
CN2009200852398U
Other languages
Chinese (zh)
Inventor
刘小伟
吴应江
曹金旭
沈威
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.)
Dongfeng Design Institute Co Ltd
Original Assignee
Dongfeng Design Institute 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.)
Filing date
Publication date
Application filed by Dongfeng Design Institute Co Ltd filed Critical Dongfeng Design Institute Co Ltd
Priority to CN2009200852398U priority Critical patent/CN201423426Y/en
Application granted granted Critical
Publication of CN201423426Y publication Critical patent/CN201423426Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a riveting and totally assembling fixture of a vehicle frame, which comprises a base, wherein a first moving-direction slide block is arranged on the base, and a supportingand clamping mechanism moving along a second moving direction is arranged on the first moving-direction slide block. The utility model has the advantages of reasonable layout and simple structure; the supporting and clamping mechanism can move longitudinally and laterally , which can satisfy different longitudinal and lateral beam riveting and total assembly of different vehicle frames; the location is precise; the use is convenient; and the riveting and totally assembling fixture of a vehicle frame solves the problems that the size precision of products can not reach the standard after the longitudinal beams and the lateral beams of a vehicle frame of the traditional truck are assembled, the assembling production environment is poor, and the like.

Description

Vehicle frame riveted joint total-assembly clamping
Technical field
The utility model belongs to heavy truck frame processing unit (plant), is specifically related to a kind of heavy truck frame riveted joint total-assembly clamping.
Background technology
Existing vehicle frame attaches together station and uses freely usually and rivet, i.e. during the riveted joint of longitudinal beam and crossbeam, do not have auxiliary clamping and positioning equipment, and the product precision be cannot say for sure also to have increased labour intensity by card; Or when having the auxiliary riveted joint of anchor clamps to assemble, its anchor clamps are fixed, and can't satisfy attaching together of many kinds vehicle frame.
Summary of the invention
The purpose of this utility model is to provide a kind of total vehicle frame riveted joint total-assembly clamping of piecing together of the riveted joint of beam in length and breadth that is applicable to different vehicle frames, to address the above problem.
The technical solution of the utility model is: vehicle frame riveted joint total-assembly clamping, and it comprises base, base is provided with first direction of motion slide block, and the support clamp mechanism that can move along second direction of motion is set on the slide block.
Establish the transverse movement track on the described base, slide block is located on the transverse movement track; Base and slide block are provided with the lengthwise movement track, support clamp mechanism and are located on the lengthwise movement track on base and the slide block.
Described transverse movement track is provided with the cross track protective cover.
Described support clamp mechanism comprises the base plate that is connected with the lengthwise movement track, and the base plate upper bracket is established fixed chuck on the bearing, the be articulated and connected piston rod of hydraulic cylinder of the active chuck that is articulated and connected on the bearing, an end of active chuck, and bearing is connected with hydraulic cylinder body.
Vehicle frame two longerons are respectively when a last station hangs in this station, fall into the web hole positioning device of these anchor clamps by the alignment pin (hand is taken) that inserts the locating hole on the longeron web, determine the relative position of left-right longeron, thereby guarantee product Diagonal Dimension precision; After left-right longeron was placed on the bearing-surface that supports clamp mechanism, hold-down head compressed (being promoted to finish by oil cylinder) longeron outside of belly in the mechanism, guaranteed that the longeron outside of belly outside abuts against on the vertical working face of clamp mechanism, thereby guaranteed the product straightness error; One-sided then longeron moves horizontally (because of the support clamp mechanism that clamps mobile longeron is installed on the mobile base towards the opposite side longeron, mobile base can move horizontally in this direction), can stop automatically when moving to correct position, thereby guarantee product width size (the web outside identity distance of two longerons from).The parts that certainly above each working face and course of action relate to have all guaranteed the corresponding accuracy of manufacture, support clamp mechanism and mobile base and are installed on the line slideway that motion is flexible, precision is higher.
For adapting to the diversity of vehicle frame product type, support clamp mechanism and can on the longeron length direction, move adjustment position (manually finishing) by line slideway, so just can support on the diverse location that is clamped in the longeron length direction; At the adjustment of different product wide variety, adopt the pressure head of different-thickness and the quick change cushion block that supports on the vertical working face of clamp mechanism cooperates realization, thereby satisfy the riveting reload request of different length, width vehicle frame product.
Slide block satisfy that crossbeam is conveniently packed into and the assembly riveted joint after taking-up, slide block is promoted to realize by two oil cylinders parallel to each other in the motion of width.
This Fixture Layout is reasonable, and it is simple in structure, supports clamp mechanism and can move total assembly of the riveted joint of beam in length and breadth that can satisfy different different vehicle frames at vertical and horizontal, and the location accurately; Easy to use, solve the legacy card vehicle carriage after the assembling of longeron and crossbeam, the every dimensional accuracy of product not up to standard with problem such as Assembling Production environment difference.
Description of drawings
Fig. 1 vehicle frame riveted joint total-assembly clamping structure schematic diagram.
Fig. 2 vehicle frame riveted joint total-assembly clamping and workpiece longitudinal beam schematic diagram.
Fig. 3 vehicle frame riveted joint total-assembly clamping left side schematic diagram.
The specific embodiment
As shown in Figure 1, establish fixed block 12 on the base 1, fixed block and base form step-like, and fixed block and base can be complete parts, also can connect to form by a plurality of parts.Show among Fig. 3 that establishing fixed block 12 on the base 1 is connected to form by a plurality of parts.Be interval with many first direction of motion tracks on the base 1, promptly horizontal moving track 3.Laterally connect slide block 2 on the moving track 3.
Fixed block 12 upper surfaces and slide block 2 upper surfaces are equipped with second direction of motion tracks on slide block 2 and fixed block 12 upper surfaces in same horizontal plane, promptly vertically move track 4.Support clamp mechanism and vertically move track 4 and be connected.
Support clamp mechanism and comprise the base plate 13 that is connected with lengthwise movement track 4, base plate 13 upper brackets 5 are established fixed chuck 14 on the bearing 5, active chuck 7 is articulated and connected on the bearing 5, the be articulated and connected piston rod 8.1 of hydraulic cylinder 8 of one end of active chuck 7, bearing 5 is articulated and connected with hydraulic cylinder 8 cylinder bodies.Connect on the fixed chuck 14 and adjust cushion block 6.
Specifically as shown in Figure 3, lengthwise movement track 4 is connected with sliding support piece 13.1, and sliding support piece 13.1 is connected with base plate 13.Establish long rails protective cover 16 on the lengthwise movement track 4, long rails protective cover 16 passes base plate 13, so promptly long rails is played a protective role, and does not influence base plate 13 again and drives vertically moving of chuck.The syndeton of slide block 2 and horizontal moving track 3 is identical with above-mentioned syndeton does not tire out at this and states, and simultaneously, the transverse movement track is provided with the cross track protective cover, and the cross track protective cover passes slide block.
As shown in Figure 1, laterally connect hydraulic cylinder between base and the slide block.Hydraulic cylinder 11 is connected between fixed block 12 and the slide block 2 in the present embodiment.Also be respectively equipped with the longeron positioner on fixed block 12 and the slide block 2.The longeron positioner comprises positioning seat 9, sets position pin-and-hole or location cotter way on the longeron positioning seat 9, sets the position bearing pin in the cotter way of in the dowel hole or location.Set position cotter way 15 in the present embodiment on the positioning seat 9, set position bearing pin 10 in the location cotter way 15.
The operation action that this equipment is specifically finished is:
A, the technology locating hole when hanging in left-right longeron to be assembled respectively, on the usefulness alignment pin 10 insertion longerons make longeron band alignment pin 10 fall into the groove of positioning seat 9, finish left-right longeron location in the vertical respectively;
B, hydraulic cylinder 8 actions are clamped on the longeron outside of belly by active chuck 7, and the longeron outside of belly outside is abutted against on the adjustment cushion block 6 on the bearing 5, guarantee the straight line precision of left-right longeron;
C, hydraulic cylinder 11 actions make slide block 2 drive on it all parts and inwardly close up and move to correct position and stop, about operating personnel place crossbeam to be assembled and ride in two longerons;
D, hydraulic cylinder 11 continues action, makes slide block 2 drive it and goes up all parts and inwardly continue to close up and move to correct position and stop, and operating personnel can wear rivet and carry out the riveted joint of crossbeam and longeron or the situation of showing and worn to continue to be brought together into behind the rivet and rivet again.
Back hydraulic cylinder 8 action is finished in f, riveted joint, and active chuck 7 unclamps, and hydraulic cylinder 11 moves and makes slide block 2 outwards move to correct position to stop, hanging away the longeron assembly after assembly unit is finished;
G, hydraulic cylinder 11 actions make slide block 2 continue outwards to move to outermost position to stop to wait for assembly unit next time.
Effect during the assembly assembly unit as shown in Figure 2.

Claims (10)

1, a kind of vehicle frame riveted joint total-assembly clamping, it comprises base, it is characterized in that base is provided with first direction of motion slide block, and the support clamp mechanism that can move along second direction of motion is set on the slide block.
2, vehicle frame is riveted total-assembly clamping according to claim 1, it is characterized in that establishing on the base transverse movement track, and slide block is located on the transverse movement track; Base and slide block are provided with the lengthwise movement track, support clamp mechanism and are located on the lengthwise movement track on base and the slide block.
3, vehicle frame is riveted total-assembly clamping as claimed in claim 1 or 2, it is characterized in that described support clamp mechanism comprises the base plate that is connected with the lengthwise movement track, the base plate upper bracket, establish fixed chuck on the bearing, active chuck is articulated and connected on the bearing, the be articulated and connected piston rod of hydraulic cylinder of one end of active chuck, bearing is connected with hydraulic cylinder body.
4,, it is characterized in that connecting on the described fixed chuck and adjust cushion block as vehicle frame riveted joint total-assembly clamping as described in the claim 3.
5, vehicle frame is riveted total-assembly clamping as claimed in claim 1 or 2, it is characterized in that also being respectively equipped with on base and the slide block longeron positioner.
6, as vehicle frame riveted joint total-assembly clamping as described in the claim 5, it is characterized in that the longeron positioner comprises positioning seat, set position pin-and-hole or location cotter way on the longeron positioning seat, set a position bearing pin in the cotter way of in the dowel hole or location.
7, vehicle frame is riveted total-assembly clamping according to claim 1, it is characterized in that laterally connecting between base and the slide block hydraulic cylinder.
8, as vehicle frame riveted joint total-assembly clamping as described in the claim 2, it is characterized in that the lengthwise movement track is provided with the long rails protective cover; The transverse movement track is provided with the cross track protective cover.
9, as heavy truck frame riveted joint total-assembly clamping as described in the claim 8, it is characterized in that the long rails protective cover passes base plate; The cross track protective cover passes slide block.
10, vehicle frame riveted joint total-assembly clamping as claimed in claim 1 or 2 is characterized in that base is provided with fixed block, fixed block upper surface and slide block upper surface in same horizontal plane, long rails be located at respectively on the fixed block upper surface with the slide block upper surface on.
CN2009200852398U 2009-04-24 2009-04-24 Riveting and totally assembling fixture of vehicle frame Expired - Lifetime CN201423426Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009200852398U CN201423426Y (en) 2009-04-24 2009-04-24 Riveting and totally assembling fixture of vehicle frame

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009200852398U CN201423426Y (en) 2009-04-24 2009-04-24 Riveting and totally assembling fixture of vehicle frame

Publications (1)

Publication Number Publication Date
CN201423426Y true CN201423426Y (en) 2010-03-17

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Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101844197A (en) * 2010-04-17 2010-09-29 山东五征集团有限公司 Riveting flexible fixture for automobile frame
CN102019498A (en) * 2010-10-29 2011-04-20 中国北车集团大连机车车辆有限公司 Ceiling welding tool and ceiling welding process
CN102366807A (en) * 2011-09-29 2012-03-07 合肥常青机械制造有限责任公司 Common riveting rack of dumper frame assembly
CN102554105A (en) * 2011-12-13 2012-07-11 苏州工业园区高登威科技有限公司 Base jig applicable to press riveting
CN102602546A (en) * 2012-04-19 2012-07-25 西安飞机工业(集团)有限责任公司 Aircraft stringer positioning method and mechanism
CN102728769A (en) * 2011-04-13 2012-10-17 漳州市昌龙汽车附件有限公司 Multi-type frame opening positioning device
CN102848360A (en) * 2012-09-28 2013-01-02 安徽江淮汽车股份有限公司 Platform for trial-manufacture of car body
CN102962789A (en) * 2012-11-16 2013-03-13 无锡明珠增压器制造有限公司 Auxiliary structure for mounting turbine sample piece
CN102962786A (en) * 2012-11-16 2013-03-13 无锡明珠增压器制造有限公司 Auxiliary device structure for installation of turbine sample
CN102962788A (en) * 2012-11-16 2013-03-13 无锡明珠增压器制造有限公司 Auxiliary device for mounting turbine sample piece
CN103157750A (en) * 2011-12-09 2013-06-19 苏州工业园区高登威科技有限公司 Machine platform
CN103157751A (en) * 2011-12-09 2013-06-19 苏州工业园区高登威科技有限公司 Machine platform
CN103303393A (en) * 2013-06-25 2013-09-18 东风汽车公司 Assembling and positioning method for framework assembly with double-cross arm independent-suspension structure
CN103785982A (en) * 2014-02-24 2014-05-14 珠海格力电器股份有限公司 Chassis welding jig assembly
CN104353743A (en) * 2014-10-30 2015-02-18 芜湖莫森泰克汽车科技有限公司 Automatic riveting device for automobile skylight glass sliding rails and bracket
CN104477274A (en) * 2014-12-06 2015-04-01 吉林赛金得智能机械制造有限公司 Fixed assembling platform
CN104826978A (en) * 2014-12-16 2015-08-12 北汽福田汽车股份有限公司 Vehicle frame fixing apparatus
CN105127744A (en) * 2015-10-21 2015-12-09 南车四方车辆有限公司 Motor train unit bottom suspension device cabin assembling tooling and method
CN105935737A (en) * 2016-06-16 2016-09-14 日照兴业汽车配件有限公司 Riveting device for automobile frame assembly
CN106217288A (en) * 2016-09-18 2016-12-14 郑州日产汽车有限公司 Vehicle frame detecting system high accuracy alignment positioning device
CN107243712A (en) * 2017-08-14 2017-10-13 安徽江淮汽车集团股份有限公司 The welding tooling of container framework
CN107775571A (en) * 2017-05-31 2018-03-09 安徽省华启汽车零部件有限公司 Adjustable vehicle frame opens a grade frock
CN109176057A (en) * 2018-10-16 2019-01-11 南京中车浦镇城轨车辆有限责任公司 Rail vehicle moves clamp for machining
CN110014254A (en) * 2018-01-10 2019-07-16 扬州中集通华专用车有限公司 Semi-trailer rear frame assembly tooling
CN110014255A (en) * 2018-01-10 2019-07-16 中集车辆(集团)有限公司 Semi-trailer front frame assembly tooling
CN110385554A (en) * 2018-04-23 2019-10-29 中集车辆(集团)有限公司 Vehicle frame assembly tooling
CN110450182A (en) * 2019-09-06 2019-11-15 安徽江淮汽车集团股份有限公司 Vehicle frame flexible fixture mechanism
FR3086268A1 (en) * 2018-09-25 2020-03-27 Airbus Operations METHOD FOR ASSEMBLING AN AIRCRAFT FUSELAGE SECTION FROM TWO SUPERIOR AND BOTTOM UPPER PARTS, VERSATILE MOUNTING SUPPORT, TOOLS AND FUSELAGE SECTION PRODUCTION UNIT FOR IMPLEMENTING SAID PROCESS
CN111687366A (en) * 2020-06-22 2020-09-22 东风汽车股份有限公司 High-precision flexible vehicle frame assembly riveting assembly fixture and control method thereof
CN112536341A (en) * 2020-11-27 2021-03-23 东风越野车有限公司 Repair welding and deformation correction device and method for military vehicle longitudinal beam
CN112621625A (en) * 2020-12-09 2021-04-09 温州大学瓯江学院 Frame positioning and clamping device for assembling new energy automobile
CN113681220A (en) * 2021-08-30 2021-11-23 东风柳州汽车有限公司 Positioning tool for longitudinal beam of frame
CN117532203A (en) * 2023-11-21 2024-02-09 湖北世学科技股份有限公司 Assembly production line for frame assembly of commercial vehicle

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101844197B (en) * 2010-04-17 2012-05-09 山东五征集团有限公司 Riveting flexible fixture for automobile frame
CN101844197A (en) * 2010-04-17 2010-09-29 山东五征集团有限公司 Riveting flexible fixture for automobile frame
CN102019498A (en) * 2010-10-29 2011-04-20 中国北车集团大连机车车辆有限公司 Ceiling welding tool and ceiling welding process
CN102728769A (en) * 2011-04-13 2012-10-17 漳州市昌龙汽车附件有限公司 Multi-type frame opening positioning device
CN102366807A (en) * 2011-09-29 2012-03-07 合肥常青机械制造有限责任公司 Common riveting rack of dumper frame assembly
CN103157750A (en) * 2011-12-09 2013-06-19 苏州工业园区高登威科技有限公司 Machine platform
CN103157751A (en) * 2011-12-09 2013-06-19 苏州工业园区高登威科技有限公司 Machine platform
CN102554105A (en) * 2011-12-13 2012-07-11 苏州工业园区高登威科技有限公司 Base jig applicable to press riveting
CN102602546A (en) * 2012-04-19 2012-07-25 西安飞机工业(集团)有限责任公司 Aircraft stringer positioning method and mechanism
CN102602546B (en) * 2012-04-19 2014-07-09 西安飞机工业(集团)有限责任公司 Aircraft stringer positioning method and mechanism
CN102848360A (en) * 2012-09-28 2013-01-02 安徽江淮汽车股份有限公司 Platform for trial-manufacture of car body
CN102848360B (en) * 2012-09-28 2015-02-04 安徽江淮汽车股份有限公司 Platform for trial-manufacture of car body
CN102962789A (en) * 2012-11-16 2013-03-13 无锡明珠增压器制造有限公司 Auxiliary structure for mounting turbine sample piece
CN102962786A (en) * 2012-11-16 2013-03-13 无锡明珠增压器制造有限公司 Auxiliary device structure for installation of turbine sample
CN102962788A (en) * 2012-11-16 2013-03-13 无锡明珠增压器制造有限公司 Auxiliary device for mounting turbine sample piece
CN103303393B (en) * 2013-06-25 2016-08-10 东风汽车公司 The assembling localization method of double cross arm independent suspension structure frame assembly
CN103303393A (en) * 2013-06-25 2013-09-18 东风汽车公司 Assembling and positioning method for framework assembly with double-cross arm independent-suspension structure
CN103785982A (en) * 2014-02-24 2014-05-14 珠海格力电器股份有限公司 Chassis welding jig assembly
CN103785982B (en) * 2014-02-24 2016-05-04 珠海格力电器股份有限公司 Chassis welding jig assembly
CN104353743A (en) * 2014-10-30 2015-02-18 芜湖莫森泰克汽车科技有限公司 Automatic riveting device for automobile skylight glass sliding rails and bracket
CN104353743B (en) * 2014-10-30 2016-08-24 芜湖莫森泰克汽车科技股份有限公司 Automobile skylight glass slide rail and support automatic riveted-joint apparatus
CN104477274A (en) * 2014-12-06 2015-04-01 吉林赛金得智能机械制造有限公司 Fixed assembling platform
CN104826978A (en) * 2014-12-16 2015-08-12 北汽福田汽车股份有限公司 Vehicle frame fixing apparatus
CN105127744A (en) * 2015-10-21 2015-12-09 南车四方车辆有限公司 Motor train unit bottom suspension device cabin assembling tooling and method
CN105127744B (en) * 2015-10-21 2017-07-07 中车四方车辆有限公司 Equipment compartment assembly tool and its assemble method under EMUs car
CN105935737A (en) * 2016-06-16 2016-09-14 日照兴业汽车配件有限公司 Riveting device for automobile frame assembly
CN105935737B (en) * 2016-06-16 2019-07-12 日照兴业汽车配件有限公司 A kind of riveting set of automotive frame assembly
CN106217288A (en) * 2016-09-18 2016-12-14 郑州日产汽车有限公司 Vehicle frame detecting system high accuracy alignment positioning device
CN107775571A (en) * 2017-05-31 2018-03-09 安徽省华启汽车零部件有限公司 Adjustable vehicle frame opens a grade frock
CN107243712B (en) * 2017-08-14 2019-02-19 安徽江淮汽车集团股份有限公司 The welding tooling of container frame
CN107243712A (en) * 2017-08-14 2017-10-13 安徽江淮汽车集团股份有限公司 The welding tooling of container framework
CN110014254A (en) * 2018-01-10 2019-07-16 扬州中集通华专用车有限公司 Semi-trailer rear frame assembly tooling
CN110014255A (en) * 2018-01-10 2019-07-16 中集车辆(集团)有限公司 Semi-trailer front frame assembly tooling
CN110014254B (en) * 2018-01-10 2025-07-15 扬州中集通华专用车有限公司 Semi-trailer rear frame assembly tooling
CN110385554A (en) * 2018-04-23 2019-10-29 中集车辆(集团)有限公司 Vehicle frame assembly tooling
FR3086268A1 (en) * 2018-09-25 2020-03-27 Airbus Operations METHOD FOR ASSEMBLING AN AIRCRAFT FUSELAGE SECTION FROM TWO SUPERIOR AND BOTTOM UPPER PARTS, VERSATILE MOUNTING SUPPORT, TOOLS AND FUSELAGE SECTION PRODUCTION UNIT FOR IMPLEMENTING SAID PROCESS
EP3628599A1 (en) * 2018-09-25 2020-04-01 Airbus Operations Method, tool and unit for producing aircraft fuselage sections
US11267585B2 (en) 2018-09-25 2022-03-08 Airbus Operations Sas Method for assembling an aircraft fuselage section from two superposed upper and lower parts, multipurpose mounting support, gear and fuselage section production unit for implementing said method
CN109176057A (en) * 2018-10-16 2019-01-11 南京中车浦镇城轨车辆有限责任公司 Rail vehicle moves clamp for machining
CN110450182B (en) * 2019-09-06 2021-09-28 安徽江淮汽车集团股份有限公司 Flexible fixture mechanism of vehicle frame
CN110450182A (en) * 2019-09-06 2019-11-15 安徽江淮汽车集团股份有限公司 Vehicle frame flexible fixture mechanism
CN111687366A (en) * 2020-06-22 2020-09-22 东风汽车股份有限公司 High-precision flexible vehicle frame assembly riveting assembly fixture and control method thereof
CN112536341A (en) * 2020-11-27 2021-03-23 东风越野车有限公司 Repair welding and deformation correction device and method for military vehicle longitudinal beam
CN112621625A (en) * 2020-12-09 2021-04-09 温州大学瓯江学院 Frame positioning and clamping device for assembling new energy automobile
CN113681220A (en) * 2021-08-30 2021-11-23 东风柳州汽车有限公司 Positioning tool for longitudinal beam of frame
CN113681220B (en) * 2021-08-30 2023-03-10 东风柳州汽车有限公司 Positioning tool for longitudinal beam of frame
CN117532203A (en) * 2023-11-21 2024-02-09 湖北世学科技股份有限公司 Assembly production line for frame assembly of commercial vehicle

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