CN109352247A - Mixer truck blade and cylinder Combination Welding equipment - Google Patents

Mixer truck blade and cylinder Combination Welding equipment Download PDF

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Publication number
CN109352247A
CN109352247A CN201811477007.7A CN201811477007A CN109352247A CN 109352247 A CN109352247 A CN 109352247A CN 201811477007 A CN201811477007 A CN 201811477007A CN 109352247 A CN109352247 A CN 109352247A
Authority
CN
China
Prior art keywords
blade
cylinder
mixer truck
tooling
welding equipment
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.)
Withdrawn
Application number
CN201811477007.7A
Other languages
Chinese (zh)
Inventor
刘学文
崔继学
张欣
杜江
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.)
Tangshan Kaiyuan Autowelding System Co ltd
Original Assignee
TANGSHAN KAIYUAN SPECIFIC WELDING EQUIPMENT 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 TANGSHAN KAIYUAN SPECIFIC WELDING EQUIPMENT CO Ltd filed Critical TANGSHAN KAIYUAN SPECIFIC WELDING EQUIPMENT CO Ltd
Priority to CN201811477007.7A priority Critical patent/CN109352247A/en
Publication of CN109352247A publication Critical patent/CN109352247A/en
Withdrawn legal-status Critical Current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
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426Fixtures for other work
    • B23K37/0435Clamps
    • 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
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • 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
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/047Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps

Abstract

The present invention relates to Combination Welding equipment technical fields, and in particular to a kind of mixer truck blade and cylinder Combination Welding equipment.The equipment includes rotary and lifting device, blade placement robot, blade welding robot and blade pairing device, rotary and lifting device is mounted on foundation pit, blade pairing device is installed, blade placing device, blade welder are separately mounted on ground on rotary and lifting device.Compared with prior art, each section of the equipment cooperates, and can be realized the automated production of mixer truck blade Yu cylinder Combination Welding, increases substantially productivity.

Description

Mixer truck blade and cylinder Combination Welding equipment
Technical field
The present invention relates to Combination Welding equipment technical fields, and in particular to a kind of mixer truck blade is set with cylinder Combination Welding It is standby.
Background technique
At present in domestic mixer truck production process, worker is existing to be put into cylinder in specific tooling, then molding Blade welds in sequence along the trajectory line finished in cylinder in advance.The blade quantity that whole process needs to weld is more, And leaf weight is larger, ventilation effect is poor in cylinder, and the large labor intensity of worker, working environment is bad, these factors affects The promotion of production capacity.
Summary of the invention
It is set in view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of mixer truck blade with cylinder Combination Welding It is standby, it can be realized the automation of blade welding cylinder process.
The present invention adopts the following technical scheme: a kind of mixer truck blade and cylinder Combination Welding equipment, including rotary and lifting Device, blade are placed robot, blade welding robot and blade pairing device, rotary and lifting device and are mounted on foundation pit, return Turn that blade pairing device is installed on lifting device, blade placing device, blade welder are separately mounted on ground.
By adopting the above technical scheme compared with the prior art, the invention has the following advantages: the equipment include revolution rise Falling unit, blade place robot, blade welding robot and blade pairing device;Each section cooperates, it is no longer necessary to work People welds blade in cylinder, can be realized the automated production of mixer truck blade Yu cylinder Combination Welding, can increase substantially Productivity meets factory mass production requirement, has a vast market space.
Preferred embodiment of the invention is:
Rotary and lifting device includes pedestal, elevating mechanism, swing mechanism and barrel support mechanism;Pedestal both ends are respectively equipped with lifting The elevating mechanism of mechanism, arranged on left and right sides is connected by swing mechanism, and elevating mechanism is slidably connected with swing mechanism;Barrel support Mechanism is arranged at the top of elevating mechanism.
Barrel support mechanism includes support rod and hydraulic cylinder;Support rod is arranged at the top of elevating mechanism, and support rod is equipped with Hydraulic cylinder.
Barrel support mechanism includes frames, screw rod, slide and dynamic structure;Frames are mounted on elevating mechanism top In portion, frames top is equipped with slide plate, and slide is arranged on slide plate, and slide is connect with slide plate slides, and slide is equipped with interior spiral shell Line structure;Dynamic structure is installed, dynamic structure is connect with screw rod, and screw set is in internal thread structure in frames.
Swing mechanism includes tooling erecting bed;Tooling erecting bed includes that revolving platform, tool locating structure and tooling compress Structure;Revolving platform upper surface is respectively arranged with multiple tool locating structures and tooling compressing structure.
Sliding slot, installs fixture on sliding slot are set on tooling compressing structure, and sliding slot is slidably connected with fixture.
Blade pairing device includes tooling main body and blade frock fixture;Tooling main body is hollow circuit cylinder cylinder, hollow circle The external side of column casing is provided with blade frock fixture, and blade frock fixture is spirally distributed.
Blade frock fixture is in logarithmic spiral curve distribution.
Electric permanent magnetism is equipped with inside blade frock fixture.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention;
Fig. 2 is rotary and lifting apparatus structure schematic diagram in embodiment 1;
Fig. 3 is blade pairing device structural schematic diagram in the present invention;
Fig. 4 is rotary and lifting apparatus structure schematic diagram in embodiment 2;
Ground 1, cylinder 2, rotary and lifting device 3, blade pairing device 4, blade place robot 5, blade welding robot 6, Pedestal 7, elevating mechanism 8, trapezoidal screw 9, servo motor 10, swing mechanism 11, tooling erecting bed 12, revolving platform 13, second Servo motor 14, tooling compressing structure 15, tool locating structure 16, welding robot 17, barrel support mechanism 18, tooling main body 19, blade frock fixture 20, electric permanent magnetism 21, the first blade 22, the second blade 23, weld seam 24, wire lever 25, guide rail 26, support Bar 27, hydraulic cylinder 28, piston rod 29, rack 30, sliding slot 31, fixture 32, annulus bottom plate 33, left elevator platform 34, right elevator Frame 35, dynamic structure 36, frames 37, slide 38.
Specific embodiment
1 the present invention is discussed in detail to attached drawing 4 and embodiment with reference to the accompanying drawing:
Embodiment 1
A kind of mixer truck blade and cylinder Combination Welding equipment are mainly welded by rotary and lifting device 3, blade placing device, blade The composition such as connection device and blade pairing device 4;In the present embodiment, blade placing device places robot 5, blade peace using blade Putting robot 5 selects Shanghai FANUC Robotics Co., Ltd. to manufacture, and specifications and models are the robot of R1000iA/100F; Blade welder uses blade welding robot 6, and blade welding robot 6 selects Co., Ltd of industry robot of Tangshan Panasonic It manufactures, specifications and models are the robot of TM2000.It is provided with hollow foundation pit on ground 1, revolution is installed in foundation pit and is risen Falling unit 3 is equipped with blade pairing device 4 at the top of rotary and lifting device 3;First blade places robot 5 and the second blade is pacified The front and rear sides that robot 5 is separately positioned on rotary and lifting device 3 is put, is symmetric;First blade places robot 5 Left side is provided with the first blade welding robot 6, and the right side that the second blade places robot 5 is equipped with the second blade welding robot 6;And blade places robot 6 and blade welding robot 5 is separately mounted on ground 1.Foundation pit is set on ground 1, is formed Rotary and lifting device 3 is placed in foundation pit by corresponding difference in height, is saved installation space, is reduced whole mounting height.
Rotary and lifting device 3 is mainly made of pedestal 7, elevating mechanism 8, swing mechanism 11 and barrel support mechanism 18 etc.; Pedestal 7 is set to foundation pit bottom surface, and 7 both ends of pedestal are respectively equipped with elevating mechanism 8, and the left and right both ends of elevating mechanism 8 pass through swing mechanism 11 connections, barrel support mechanism 18 are separately positioned on 8 four angles in top of elevating mechanism, and barrel support mechanism 18 is symmetrical arranged.
Wherein, elevating mechanism 8 is mainly by left elevator platform 34, right elevator platform 35, trapezoidal screw 9 and servo motor 10 etc. Composition;Left elevator platform 34 is vertically installed at the arranged on left and right sides of pedestal 7 with right lifting support 35 respectively, is symmetrical set;Zuo Sheng Two guide rails 26 are separately installed on drop rack 34 and right lifting support 35, and two guide rails 26 are parallel and isometric setting.Left lifting It is respectively arranged with trapezoidal screw 9 in the middle part of rack 34 and right lifting support 35, trapezoidal screw 9 is mainly by wire lever 25 and mother lead screw etc. Composition, the lower end of wire lever 25 are threadedly coupled with left elevator platform 34 or right lifting support 35, the upper end of wire lever 25 and servo Motor 10 connects;Mother lead screw is set on wire lever 25, mother lead screw is threadedly coupled with wire lever 25, can along wire lever 25, Lower movement.Elevating mechanism 8 uses trapezoidal screw 9, and trapezoidal screw 9 has a certain self-locking function.
Swing mechanism 11 is mainly by groups such as rack 30, tooling erecting bed 12, welding robot 17 and the second servo motors 14 At;Rack 30 is mounted on the mother lead screw of trapezoidal screw 9, and the side of rack 30 is provided with welding robot 17, welding robot 17 front ends are equipped with welding gun, and welding gun is fixed for cylinder 2 and the spot welding of blade;The second servo motor 14 is arranged in 30 other side of rack, The output end of second servo motor 14 is connect with pinion gear.Tooling erecting bed 12, tooling erecting bed 12 are installed among rack 30 Mainly it is made of tool locating structure 16, tooling compressing structure 15 and revolving platform 13 etc.;13 bottom of revolving platform is equipped with revolution Bearing, pivoting support and pinion gear engaged transmission;The upper surface of revolving platform 13 is evenly distributed with 4 tooling compressing structures along annular direction 15, sliding slot 31, installs fixture 32 on sliding slot 31 are set on tooling compressing structure 15, and sliding slot 31 is slidably connected with fixture 32, fixture 32 connect with power source;13 upper surface of revolving platform is additionally provided with 2 tool locating structures 16, and tool locating structure 16 is adopted With shop bolt, shop bolt is arranged symmetrically;The sliding of fixture 32 is controlled by power source, is realized and is compressed operation.
Barrel support mechanism 18 is mainly made of support rod 27 and hydraulic cylinder 28 etc.;Left elevator platform 34 and right lifting support Four angles at 35 tops are respectively arranged with support rod 27, and hydraulic cylinder 28, support rod 27 and hydraulic cylinder 28 are equipped on support rod 27 It is vertically arranged, the piston rod 29 of hydraulic cylinder 28, piston rod 29 is directed toward the direction for deviating from 11 center of swing mechanism;Barrel support mechanism 18 play a part of to support cylinder 2 in tooling and workpiece separation process;And it is stretched out by control 28 forward bolt piston bar 29 of hydraulic cylinder Length, the position of four barrel support mechanisms 18 is adjusted, to adapt to the cylinder 2 of different-diameter.
Blade pairing device 4 is mainly made of tooling main body 19 and blade frock fixture 20 etc.;Tooling main body 19 is hollow Cylindrical tube, hollow circuit cylinder cylinder outside are provided with blade frock fixture 20, and it is two groups that blade frock fixture 20, which is divided to, two groups of blades Tooling fixture 20 is symmetrical arranged in 180 °, and every group of blade frock fixture 20 is spirally distributed;Wherein, blade frock fixture 20 Using rectangular support structure, rectangular support structure is connected by screw bolts with hollow circuit cylinder cylinder, the upper surface of rectangular support structure Using adaptability design, can be bonded completely with blade;For example, 22 angle with horizontal plane of the first blade is about 18 degree, Also about 18 degree of the upper surface angle with horizontal plane of rectangular support structure.20 interior forward end of blade frock fixture is equipped with electric permanent magnetism 21, the positioning for blade;In the present embodiment, two groups of blade frock fixtures 20 are distributed in double-log helical curve;Tooling main body 19 bottoms are provided with annulus bottom plate 33, and annulus bottom plate 33 is set there are two the circular hole being arranged symmetrically, and Circularhole diameter is greater than shop bolt Diameter 2mm ~ 5mm;Shop bolt is sleeved in the circular hole of 19 bottom of tooling main body, cooperates tooling compressing structure 15, by tooling 19 location and installation of main body is on tooling erecting bed 12.
Embodiment 2
The present embodiment middle cylinder body supporting mechanism 18 is different from the structure in embodiment 1, and other structures remain unchanged.
The present embodiment middle cylinder body supporting mechanism 18 is mainly by groups such as frames 37, screw rod, slide 38 and dynamic structures 36 At;Frames 37 are separately mounted on four angles at 8 top of elevating mechanism, and 37 top of frames is equipped with slide plate, slide plate Upper setting slide, slide are connect with slide plate slides, and internal thread structure is equipped in slide;37 side of frames is installed by dynamic knot Structure 36, dynamic structure 36 are connect with screw rod, and screw rod bushing matches in internal thread structure with internal thread structure;Pass through drive Dynamic dynamic structure 36 drives screw rod rotation, realizes the relative movement of slide 38, to achieve the purpose that adjust 38 position of slide, thus Adapt to the workpiece requirement of different-diameter.
The mixer truck blade and the course of work of cylinder Combination Welding equipment are as follows:
The front and rear sides of the equipment is respectively arranged with blade welding robot 6, weldering while capable of being completed at the same time two groups of blades It connects, forms double-log helical curve, improve working efficiency.
Two blades being symmetrically distributed place robot 5 and first blade 22 are placed on blade frock fixture 20, block 21 surface of electric permanent magnetism installed on tool is bonded completely with blade, and positioning is sucked in blade through electrical control;Then, blade places machine Second blade 23 is placed on blade frock fixture 20 by device people 5, and electric permanent magnetism 21 positions blade;Then, blade welding robot People 6 is to 24 spot welding of weld seam;Then, rotary and lifting device 3 acts, and drives trapezoidal screw 9 by the servo motor 10 of elevating mechanism 8 Rotation, makes swing mechanism 11 decline corresponding distance.Meanwhile the second servo motor 14 on swing mechanism 11 drives revolving platform 13, tooling erecting bed 12 is rotated into corresponding angle counterclockwise, next blade positioning tool is made to reach designated position.Blade peace It puts after blade is in place by robot 5, blade welding robot 6 is to weld seam spot welding;It is repeated in above-mentioned movement, until will be complete Portion's blade spot welding is completed.Last blade welding robot 6 is fully welded weld seam, 3 opposite direction of rotary and lifting device movement, make weld seam according to Secondary arrival welding position, and all to be fully welded completion.
Cylinder 2 is buckled on the blade welded from top, welding robot 17 fixes cylinder 2 and blade spot welding, simultaneously 4 barrel support mechanisms 18 are driven to remain stationary the workpiece after combination.Then, by the electric permanent magnetism 21 in blade pairing device 4 Demagnetization, rotary and lifting device 3 fall before corresponding distance, and rotary and lifting device 3 declines on one side, turns round on one side, by tooling and work Part separation;The workpiece combined is finally transported to next station.

Claims (9)

1. a kind of mixer truck blade and cylinder Combination Welding equipment, including rotary and lifting device, blade placing device, blade weld Device and blade pairing device, it is characterised in that: rotary and lifting device is mounted on foundation pit, is equipped with leaf on rotary and lifting device Piece pairing device, blade placing device, blade welder are separately mounted on ground.
2. mixer truck blade according to claim 1 and cylinder Combination Welding equipment, it is characterised in that: rotary and lifting device Including pedestal, elevating mechanism, swing mechanism and barrel support mechanism;Pedestal both ends are respectively equipped with elevating mechanism, arranged on left and right sides Elevating mechanism is connected by swing mechanism, and elevating mechanism is slidably connected with swing mechanism;Barrel support mechanism is arranged in elevator At the top of structure.
3. mixer truck blade according to claim 2 and cylinder Combination Welding equipment, it is characterised in that: barrel support mechanism Including support rod and hydraulic cylinder;Support rod is arranged at the top of elevating mechanism, and support rod is equipped with hydraulic cylinder.
4. mixer truck blade according to claim 2 and cylinder Combination Welding equipment, it is characterised in that: barrel support mechanism Including frames, screw rod, slide and dynamic structure;On frames are mounted at the top of elevating mechanism, frames top peace Equipped with slide plate, slide is set, slide is connect with slide plate slides, and slide is equipped with internal thread structure on slide plate;Pacify in frames Equipped with dynamic structure, dynamic structure is connect with screw rod, and screw set is in internal thread structure.
5. mixer truck blade according to claim 2 and cylinder Combination Welding equipment, it is characterised in that: swing mechanism includes Tooling erecting bed;Tooling erecting bed includes revolving platform, tool locating structure and tooling compressing structure;Revolving platform upper surface point Multiple tool locating structures and tooling compressing structure are not set.
6. mixer truck blade according to claim 5 and cylinder Combination Welding equipment, it is characterised in that: tooling compressing structure Upper setting sliding slot, installs fixture on sliding slot, sliding slot are slidably connected with fixture.
7. mixer truck blade according to claim 1 and cylinder Combination Welding equipment, it is characterised in that: blade pairing device Including tooling main body and blade frock fixture;Tooling main body is hollow circuit cylinder cylinder, is provided with blade on the outside of hollow circuit cylinder cylinder Tooling fixture, blade frock fixture are spirally distributed.
8. mixer truck blade according to claim 7 and cylinder Combination Welding equipment, it is characterised in that: blade frock fixture In logarithmic spiral curve distribution.
9. mixer truck blade according to claim 8 and cylinder Combination Welding equipment, it is characterised in that: blade frock fixture Inside is equipped with electric permanent magnetism.
CN201811477007.7A 2018-12-05 2018-12-05 Mixer truck blade and cylinder Combination Welding equipment Withdrawn CN109352247A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811477007.7A CN109352247A (en) 2018-12-05 2018-12-05 Mixer truck blade and cylinder Combination Welding equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811477007.7A CN109352247A (en) 2018-12-05 2018-12-05 Mixer truck blade and cylinder Combination Welding equipment

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CN109352247A true CN109352247A (en) 2019-02-19

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Cited By (14)

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Publication number Priority date Publication date Assignee Title
CN112222709A (en) * 2020-11-10 2021-01-15 岳西十行机械设备有限公司 Attitude adjusting method of clutch type welding clamp
CN112222695A (en) * 2020-11-10 2021-01-15 岳西十行机械设备有限公司 Posture adjusting mechanism of welding assembly fixture
CN112276399A (en) * 2020-11-02 2021-01-29 岳西十行机械设备有限公司 Method for positioning and clamping spiral blade
CN112276400A (en) * 2020-11-02 2021-01-29 岳西十行机械设备有限公司 Clamping fixture for automatic welding of helical blades
CN112355538A (en) * 2020-12-15 2021-02-12 岳西十行机械设备有限公司 Clamping device with angle and interval adjustment functions
CN112355546A (en) * 2020-11-10 2021-02-12 岳西十行机械设备有限公司 System for welding helical blade on circular inner cylinder wall
CN112372188A (en) * 2020-11-10 2021-02-19 岳西十行机械设备有限公司 Method for welding helical blade on circular inner cylinder wall
CN112475750A (en) * 2020-12-15 2021-03-12 岳西十行机械设备有限公司 Method for adjusting outer diameter, spacing and orientation
CN112518216A (en) * 2020-12-15 2021-03-19 岳西十行机械设备有限公司 Angle adjusting module
CN113400030A (en) * 2021-07-26 2021-09-17 唐山开元自动焊接装备有限公司 Preparation process of tank body of mixer truck
CN113523632A (en) * 2021-07-26 2021-10-22 唐山开元自动焊接装备有限公司 Preparation process for blade butt joint of mixer truck and special tool
CN113547258A (en) * 2021-07-26 2021-10-26 唐山开元自动焊接装备有限公司 Nesting process for cone part of tank body of mixer truck
CN114905212A (en) * 2022-05-10 2022-08-16 中联重科股份有限公司 Coaxial positioning device and hollow revolving body production line
CN115283896A (en) * 2022-10-09 2022-11-04 张家港市天源机械制造有限公司 Biomass gasification stove processing apparatus

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CN112276399B (en) * 2020-11-02 2022-02-25 岳西十行机械设备有限公司 Method for positioning and clamping spiral blade
CN112276399A (en) * 2020-11-02 2021-01-29 岳西十行机械设备有限公司 Method for positioning and clamping spiral blade
CN112276400A (en) * 2020-11-02 2021-01-29 岳西十行机械设备有限公司 Clamping fixture for automatic welding of helical blades
CN112276400B (en) * 2020-11-02 2022-03-01 岳西十行机械设备有限公司 Clamping fixture for automatic welding of helical blades
CN112222695A (en) * 2020-11-10 2021-01-15 岳西十行机械设备有限公司 Posture adjusting mechanism of welding assembly fixture
CN112222709A (en) * 2020-11-10 2021-01-15 岳西十行机械设备有限公司 Attitude adjusting method of clutch type welding clamp
CN112355546A (en) * 2020-11-10 2021-02-12 岳西十行机械设备有限公司 System for welding helical blade on circular inner cylinder wall
CN112372188A (en) * 2020-11-10 2021-02-19 岳西十行机械设备有限公司 Method for welding helical blade on circular inner cylinder wall
CN112222709B (en) * 2020-11-10 2023-07-14 岳西十行机械设备有限公司 Method for adjusting posture of clutch type welding fixture
CN112355538A (en) * 2020-12-15 2021-02-12 岳西十行机械设备有限公司 Clamping device with angle and interval adjustment functions
CN112518216A (en) * 2020-12-15 2021-03-19 岳西十行机械设备有限公司 Angle adjusting module
CN112475750A (en) * 2020-12-15 2021-03-12 岳西十行机械设备有限公司 Method for adjusting outer diameter, spacing and orientation
CN113523632A (en) * 2021-07-26 2021-10-22 唐山开元自动焊接装备有限公司 Preparation process for blade butt joint of mixer truck and special tool
CN113547258A (en) * 2021-07-26 2021-10-26 唐山开元自动焊接装备有限公司 Nesting process for cone part of tank body of mixer truck
CN113400030A (en) * 2021-07-26 2021-09-17 唐山开元自动焊接装备有限公司 Preparation process of tank body of mixer truck
CN114905212A (en) * 2022-05-10 2022-08-16 中联重科股份有限公司 Coaxial positioning device and hollow revolving body production line
CN115283896A (en) * 2022-10-09 2022-11-04 张家港市天源机械制造有限公司 Biomass gasification stove processing apparatus

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