CN103464985B - The production technology of the swing arm of forklift truck/loading machine and fine finishining fixing tool thereof - Google Patents
The production technology of the swing arm of forklift truck/loading machine and fine finishining fixing tool thereof Download PDFInfo
- Publication number
- CN103464985B CN103464985B CN201310429470.5A CN201310429470A CN103464985B CN 103464985 B CN103464985 B CN 103464985B CN 201310429470 A CN201310429470 A CN 201310429470A CN 103464985 B CN103464985 B CN 103464985B
- Authority
- CN
- China
- Prior art keywords
- swing arm
- arm
- connecting hole
- fixed bar
- fine finishining
- 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.)
- Active
Links
Landscapes
- Forklifts And Lifting Vehicles (AREA)
Abstract
The present invention relates to a kind of production technology and fine finishining fixing tool thereof of swing arm of forklift truck/loading machine, this fixing tool comprises base and the main backstop that is assemblied on this base and four fixed mechanisms; The rocking arm connecting hole of this swing arm is assemblied in the top of this main backstop by bearing pin; Four these fixed mechanisms are respectively used to four arm ends of fixing swing arm; This production technology is made through operations such as Numerical control cutting, spot welding, full weldering, correction and Roughing and fine machinings by material to obtain shaping swing arm.Swing arm is prepared by technical scheme of the present invention, effectively improve the axiality in hole corresponding on swing arm, swing arm form and position tolerance is little, significantly reduce percent defective, product quality is guaranteed, and has stopped former technique and cannot ensure form and position tolerance school dimensional accuracy because of welding deformation amount, also reduces in production and service process the dependence of master craftsman having special skill, effectively improve production efficiency, reduce production cost.
Description
Technical field
The present invention relates to a kind of production technology and fixing tool thereof of swing arm, refer to a kind of production technology and fine finishining fixing tool thereof of swing arm of forklift truck/loading machine especially.
Background technology
With reference to Fig. 2, Fig. 3, the swing arm 4 of forklift truck/loading machine is by product another part drawing dimensional requirement, cuts into the parts that several shapes are not identical, is then welded into semi-finished product swing arm by assembling drawing requirement point.Swing arm 4 comprises left mainboard 41, right mainboard 42, left and right mainboard is connected to one by girder 43 and connecting plate 44, left and right mainboard is symmetrical structure, the front end of mainboard is drilled with front connecting hole 4a, rear end is provided with rear connecting hole 4d, the place to the rear, middle part of left and right mainboard also welds respectively and is provided with assembly parts 45, and these assembly parts 45 are provided with oil cylinder connecting hole 4c, and this girder 43 is provided with rocking arm connecting hole 4b.Existing swing arm production method is: first on variform parts, correspondence gets out different holes (roughing), i.e. front connecting hole 4a, rocking arm connecting hole 4b, oil cylinder connecting hole 4c, rear connecting hole 4d; Then fine finishining is carried out in the hole on each parts; Again difform parts are welded into semi-finished product swing arm by requirement point in simple frock of assembling drawing, weld completely again and obtain shaping swing arm, by Local heating method, four of swing arm arm ends are corrected again, finally the swing arm of complete finished product is obtained to the swing arm process such as to spray paint of polishing.There is following problems in this swing arm production method existing: the symmetry of left and right mainboard is poor, the axiality in hole corresponding on especially left and right mainboard is very undesirable, form and position tolerance is very large, the swing arm produced much can not reach requirement, sophisticated technical staff is needed to carry out a large amount of correction work, the production efficiency of swing arm is low, and very big to the dependence of veteran calibration technology personnel, production cost is high.
Summary of the invention
The invention provides a kind of production technology and fine finishining fixing tool thereof of swing arm of forklift truck/loading machine, very undesirable with the axiality overcoming hole corresponding on the left and right mainboard of existing swing arm production technology existence, form and position tolerance is very large, product swing arm is many can not reach requirement, sophisticated technical staff is needed to carry out a large amount of correction work, the production efficiency of swing arm is low, very big to the dependence of veteran calibration technology personnel, the problems such as production cost is high.
The present invention adopts following technical scheme:
The fine finishining fixing tool of the swing arm of forklift truck/loading machine, this fixing tool comprises base and the main backstop that is assemblied on this base and four fixed mechanisms; The rocking arm connecting hole of this swing arm is assemblied in the top of this main backstop by bearing pin; Four these fixed mechanisms are respectively used to four arm ends of fixing swing arm.
More specifically, above-mentioned base top surface is provided with the chute of at least two parallel arrangements, and this base is equipped with slide block, and this slide block can laterally fit slidably in this chute; This slider top is provided with screw rod, and this screw rod is equipped with nut, is all fixedly assemblied on this base by this nut this screw rod sealed bottom above-mentioned main backstop and above-mentioned fixed mechanism.
Each above-mentioned fixed mechanism includes main frame body and is assemblied in the first fixed bar, the second fixed bar, the 3rd fixed bar and the 4th fixed bar on main frame body, one end end face of this first fixed bar connects the end face of the said arm end of above-mentioned swing arm, the end face of this second fixed bar connects the bottom surface of this arm end, 3rd fixed bar one end end face connects the front side wall of this arm end, and the 4th fixed bar one end end face connects the rear wall of this arm end.More specifically, above-mentioned first fixed bar, the second fixed bar, the 3rd fixed bar and the 4th fixed bar difference Screw assembly is on above-mentioned main frame body.Further, above-mentioned main frame body is provided with the first adjustment through hole for assembling above-mentioned first fixed bar of a plurality of even arrangement, this main frame body is provided with the second adjustment blind hole for assembling above-mentioned second fixed bar of a plurality of even arrangement, this main frame body is provided with the 3rd adjustment through hole for assembling above-mentioned 3rd fixed bar of a plurality of even arrangement, and this main frame body is provided with the 4th adjustment through hole for assembling above-mentioned 4th fixed bar of a plurality of even arrangement.
A production technology for the swing arm of the forklift truck/loading machine of above-mentioned fine finishining fixing tool, this production technology comprises the following step of carrying out successively:
A. Numerical control cutting: Numerical control cutting obtains the parts forming swing arm, connecting hole, rocking arm connecting hole, oil cylinder connecting hole, rear connecting hole before needing the correspondence position cutting arranged on the parts of through hole to obtain leaving allowance, this rear connecting hole is used for connecting vehicle frame;
B. spot welding: spot welding is connected to form semi-finished product swing arm;
C. entirely weld: semi-finished product swing arm is welded as shaping swing arm completely;
D. correct: adopt Local heating method to correct four of shaping swing arm said arm ends;
E. roughing, fine finishining: the rocking arm connecting hole of calibrated shaping swing arm is assemblied in the top of this main backstop by bearing pin, four arm end correspondences of shaping swing arm are assemblied on four described fixed mechanisms, regulate four these fixed mechanisms, make to add the front connecting hole of shaping swing arm in man-hour, rocking arm connecting hole, oil cylinder connecting hole, the center line of rear connecting hole and the dead in line of bidirectional boring machine boring cutter, roughing reduces allowance; After changing cutter head, fine finishining is carried out to shaping swing arm;
F. polish, spray paint: the swing arm that fine finishining completes obtains finished product swing arm through polishing, painting process.
From the above-mentioned description to structure of the present invention, compared to the prior art, tool of the present invention has the following advantages: by the use of fine finishining fixing tool of the present invention, change the production technology of original swing arm, making to produce the swing arm obtained processes precisely, swing arm is upper left, the front connecting hole on right side, rocking arm connecting hole, oil cylinder connecting hole, rear connecting hole symmetry is good, and alignment is ideal, and the form and position tolerance of swing arm entirety is also very little, the quality of the swing arm prepared by fine finishining fixing tool of the present invention and production technology obtains effective guarantee, having stopped former technique because of welding deformation amount cannot ensure form and position tolerance school dimensional accuracy, cause product final assemble or after dispatching from the factory, because swing arm deflection affects general assembly and serviceability, the master craftsman needing to be grasped special skill goes to add thermal recalibration at the scene, increase assembling and the workload of after-sale service, the enforcement of technical scheme of the present invention reduces in production and service process the dependence of master craftsman having special skill, effectively reduce the workload of correction work amount in production process and after-sale service, also reduce the dependence of production process to experience personnel, effectively improve production efficiency, reduce production cost, in addition, fine finishining fixing tool structure of the present invention is simple, easily produce and obtain, and this fixing tool does not wear and tear substantially in the production process of swing arm, long service life, finally, the frame mode of fine finishining fixing tool of the present invention makes it can do adaptive adjustment according to the specification of different swing arm, this steady job very superior with the suitability of swing arm, uses the frock cost of swing arm production method of the present invention comparatively cheap.
Accompanying drawing explanation
Fig. 1 is the right TV structure schematic diagram of the fixing tool of the present invention being equipped with swing arm.
Fig. 2 is the plan structure schematic diagram of the fixing tool of the present invention being equipped with swing arm.
Fig. 3 is the right TV structure schematic diagram of swing arm.
Fig. 4 is the sectional structure chart in A-A direction in Fig. 2.
Fig. 5 is the enlarged drawing of the local X in Fig. 1.
Detailed description of the invention
With reference to the accompanying drawings the specific embodiment of the present invention is described.
With reference to Fig. 1, Fig. 2, Fig. 5, the fine finishining fixing tool of the swing arm of forklift truck/loading machine, this fixing tool comprises base 1 and the main backstop 2 that is assemblied on this base 1 and four fixed mechanisms 3; The rocking arm connecting hole 4b of this swing arm 4 is assemblied in the top of this main backstop 2 by bearing pin 21, the diameter of bearing pin 21 and the diameter compatible of this rocking arm connecting hole 4b are fitted; Four these fixed mechanisms 3 are respectively used to four arm ends 46 of fixing swing arm 4.
Continue with reference to Fig. 2, Fig. 4, more specifically, the number that above-mentioned base 1 end face is provided with the chute 10(chute 10 of 11 equidistant parallel arrangements also can make an amendment according to the need of production of engineering, as two, five, eight etc.), this base 1 is equipped with slide block 11, and this slide block 11 can laterally fit slidably in this chute 10; This slide block 11 top is provided with screw rod 12, and this screw rod 12 is equipped with nut 13, is all fixedly assemblied on this base 1 by this nut 13 this screw rod 12 ground sealed bottom above-mentioned main backstop 2 and above-mentioned fixed mechanism 3.
Continue with reference to Fig. 1, Fig. 2, Fig. 5, each above-mentioned fixed mechanism 3 includes main frame body 31 and is assemblied in the first fixed bar 32, second fixed bar 33, the 3rd fixed bar 34 and the 4th fixed bar 35 on main frame body 31, one end end face of this first fixed bar 32 connects the end face of the said arm end 46 of above-mentioned swing arm 4, the end face of this second fixed bar 33 connects the bottom surface of this arm end 46,3rd fixed bar 34 one end end face connects the front side wall of this arm end 46, and the 4th fixed bar 35 one end end face connects the rear wall of this arm end 46.More specifically, above-mentioned first fixed bar 32, second fixed bar 33, the 3rd fixed bar 34 and the 4th fixed bar 35 difference Screw assembly is on above-mentioned main frame body 31.Further, above-mentioned main frame body 31 is provided with the first adjustment through hole 36 for assembling above-mentioned first fixed bar 32 of a plurality of even arrangement, this main frame body 31 is provided with the second adjustment blind hole 37 for assembling above-mentioned second fixed bar 33 of a plurality of even arrangement, this main frame body 31 is provided with the 3rd adjustment through hole 38 for assembling above-mentioned 3rd fixed bar 34 of a plurality of even arrangement, and this main frame body 31 is provided with the 4th adjustment through hole for assembling above-mentioned 4th fixed bar 35 of a plurality of even arrangement.
Continue with reference to Fig. 1, Fig. 2, a kind of production technology of swing arm of forklift truck/loading machine of above-mentioned fine finishining fixing tool, this production technology comprises the following step of carrying out successively:
A. Numerical control cutting: Numerical control cutting obtains the parts forming swing arm 4, connecting hole 4a, rocking arm connecting hole 4b, oil cylinder connecting hole 4c, rear connecting hole 4d before needing the correspondence position cutting arranged on the parts of through hole to obtain, this rear connecting hole 4d is used for connecting vehicle frame; The diameter in each hole that this operation is bored is all little than the diameter in hole corresponding on finished product swing arm 4, and certain allowance is left in each hole;
B. spot welding: spot welding is connected to form semi-finished product swing arm;
C. entirely weld: semi-finished product swing arm is welded as shaping swing arm completely;
D. correct: adopt Local heating method to correct four of shaping swing arm said arm ends 46;
E. roughing, fine finishining: the rocking arm connecting hole 4b of calibrated shaping swing arm is assemblied in the top of this main backstop 2 by bearing pin 21, four arm end 46 correspondences of shaping swing arm are assemblied on four above-mentioned fixed mechanisms 3, regulate four these fixed mechanisms 3, make to add front connecting hole 4a, the rocking arm connecting hole 4b of shaping swing arm in man-hour, oil cylinder connecting hole 4c, the center line of rear connecting hole 4d and the dead in line of bidirectional boring machine boring cutter, roughing reduces allowance, and (roughing is exactly that blank is removed a part, is next fine finishining determination benchmark.Because accurately machined tool precision is high, the surplus of removal is little as far as possible, causes finishing tool to damage or precision reduction if removal surplus crosses conference.); After changing cutter head, fine finishining is carried out to shaping swing arm; On shaping swing arm before finishing step, even if the axiality in the hole that left and right side is corresponding is poor, but be through after the axis allowance of left and right boring cutter to hole be on same straight line cuts, namely the axiality in the hole that left and right side is corresponding becomes ideal very;
F. polish, spray paint: the swing arm that fine finishining completes obtains finished product swing arm 4 through polishing, painting process.
By the use of fine finishining fixing tool of the present invention, change the production technology of original swing arm, making to produce the swing arm obtained processes precisely, swing arm is upper left, the front connecting hole 4a on right side, rocking arm connecting hole 4b, oil cylinder connecting hole 4c, rear connecting hole 4d symmetry is good, and axiality (axiality be used to should be coaxial in control theory tested axis and the disalignment degree of datum axis) ideal, and the form and position tolerance of swing arm entirety (part after processing not only has scale error, the point of constituent part geometric properties, line, the shape that the true form in face or mutual alignment and desirable solid specify and mutual alignment also inevitably there are differences, this difference is in shape exactly form error, and the difference of mutual alignment is exactly site error, be referred to as Form and position error) also very little, the quality of the swing arm prepared by fine finishining fixing tool of the present invention and production technology obtains effective guarantee, effectively reduce the workload of correction work amount and after-sale service, also reduce the dependence of production process to experience personnel, effectively improve production efficiency, reduce production cost, in addition, fine finishining fixing tool structure of the present invention is simple, easily produce and obtain, and this fixing tool does not wear and tear substantially in the production process of swing arm, long service life, finally, the frame mode of fine finishining fixing tool of the present invention makes it can do adaptive adjustment according to the specification of different swing arm, this steady job very superior with the suitability of swing arm, uses the frock cost of swing arm production method of the present invention comparatively cheap.
Above are only the specific embodiment of the present invention, but design concept of the present invention is not limited thereto, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should belong to the behavior of invading scope.
Claims (4)
1. the fine finishining fixing tool of the swing arm of forklift truck/loading machine, is characterized in that: described fixing tool comprises base and the main backstop that is assemblied on this base and four fixed mechanisms; The rocking arm connecting hole of this swing arm is assemblied in the top of this main backstop by bearing pin; Four these fixed mechanisms are respectively used to four arm ends of fixing swing arm; Each this fixed mechanism includes main frame body and is assemblied in the first fixed bar, the second fixed bar, the 3rd fixed bar and the 4th fixed bar on main frame body, one end end face of this first fixed bar connects the end face of the arm end of above-mentioned swing arm, the end face of this second fixed bar connects the bottom surface of this arm end, 3rd fixed bar one end end face connects the front side wall of this arm end, and the 4th fixed bar one end end face connects the rear wall of this arm end; This main frame body is provided with the first adjustment through hole for assembling described first fixed bar of a plurality of even arrangement, this main frame body is provided with the second adjustment blind hole for assembling described second fixed bar of a plurality of even arrangement, this main frame body is provided with the 3rd adjustment through hole for assembling described 3rd fixed bar of a plurality of even arrangement, and this main frame body is provided with the 4th adjustment through hole for assembling described 4th fixed bar of a plurality of even arrangement.
2. the fine finishining fixing tool of the swing arm of forklift truck/loading machine as claimed in claim 1, it is characterized in that: described base top surface is provided with the chute of at least two parallel arrangements, this base is equipped with slide block, and this slide block can laterally fit slidably in this chute; This slider top is provided with screw rod, and this screw rod is equipped with nut, is all fixedly assemblied on this base by this nut this screw rod sealed bottom described main backstop and described fixed mechanism.
3. use a production technology for the swing arm of the forklift truck/loading machine of the arbitrary described fine finishining fixing tool of claim 1 to 2, it is characterized in that, this production technology comprises the following step of carrying out successively:
A. Numerical control cutting: Numerical control cutting obtains the parts forming swing arm, connecting hole, rocking arm connecting hole, oil cylinder connecting hole, rear connecting hole before needing the correspondence position cutting arranged on the parts of through hole to obtain leaving allowance, this rear connecting hole is used for connecting vehicle frame;
B. spot welding: spot welding is connected to form semi-finished product swing arm;
C. entirely weld: semi-finished product swing arm is welded as shaping swing arm completely;
D. correct: adopt Local heating method to correct four of shaping swing arm described arm ends;
E. roughing, fine finishining: the rocking arm connecting hole of calibrated shaping swing arm is assemblied in the top of this main backstop by bearing pin, four arm end correspondences of shaping swing arm are assemblied on four described fixed mechanisms, regulate four these fixed mechanisms, make to add the front connecting hole of shaping swing arm in man-hour, rocking arm connecting hole, oil cylinder connecting hole, the center line of rear connecting hole and the dead in line of bidirectional boring machine boring cutter, roughing reduces allowance; After changing cutter head, fine finishining is carried out to shaping swing arm.
4. the production technology of the swing arm of forklift truck/loading machine as claimed in claim 3, is characterized in that: the swing arm that step e fine finishining completes obtains finished product swing arm through polishing, painting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310429470.5A CN103464985B (en) | 2013-09-22 | 2013-09-22 | The production technology of the swing arm of forklift truck/loading machine and fine finishining fixing tool thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310429470.5A CN103464985B (en) | 2013-09-22 | 2013-09-22 | The production technology of the swing arm of forklift truck/loading machine and fine finishining fixing tool thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103464985A CN103464985A (en) | 2013-12-25 |
| CN103464985B true CN103464985B (en) | 2016-01-20 |
Family
ID=49790149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310429470.5A Active CN103464985B (en) | 2013-09-22 | 2013-09-22 | The production technology of the swing arm of forklift truck/loading machine and fine finishining fixing tool thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103464985B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104400418B (en) * | 2014-09-26 | 2018-04-13 | 黄国峰 | A kind of height of electromechanical equipment refines prosecutor method |
| CN104384784A (en) * | 2014-09-29 | 2015-03-04 | 无锡明珠钢球有限公司 | Auxiliary frame tool |
| CN104476147A (en) * | 2014-10-29 | 2015-04-01 | 苏州市金德誉精密机械有限公司 | Connecting rod machining technology |
| CN104439974B (en) * | 2014-11-28 | 2016-10-05 | 南通润力机械制造有限公司 | A kind of by the process for machining of the self-unloading boom base of nine fluid motor-driven |
| CN104493421A (en) * | 2014-12-15 | 2015-04-08 | 安徽合力股份有限公司 | Device for correcting movable arm of loading machine |
| CN110253295B (en) * | 2019-07-03 | 2020-11-17 | 乐清市曙晟科技有限公司 | Machining tool device for automobile rocker arm |
| CN110394602B (en) * | 2019-07-29 | 2020-08-28 | 新昌县凯杰机械有限公司 | Manufacturing process of rib plate structure of hydraulic vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203459943U (en) * | 2013-09-22 | 2014-03-05 | 福建省威盛机械发展有限公司 | Fine-machining fixing tool for movable arm of fork truck/loader |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6305106B1 (en) * | 2001-02-23 | 2001-10-23 | Mclellan Robin S. | Apparatus for releasably coupling an attachment to an excavator |
| CN201009062Y (en) * | 2007-02-13 | 2008-01-23 | 三一重机有限公司 | Frock for soldering excavator movable arm set |
| CN201079935Y (en) * | 2007-08-14 | 2008-07-02 | 周梓健 | Assembly components for assembling movable arm of loading machine |
| CN202162524U (en) * | 2011-07-10 | 2012-03-14 | 龙工（上海）挖掘机制造有限公司 | Device for welding moveable arm of excavator |
| CN202527956U (en) * | 2012-03-28 | 2012-11-14 | 苏州澳克机械有限公司 | Tool for processing moving arm of excavating machine |
| CN102814683B (en) * | 2012-08-27 | 2015-09-23 | 临沂胜代机械有限公司 | Dynamic fast-positioning device and using method thereof |
-
2013
- 2013-09-22 CN CN201310429470.5A patent/CN103464985B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203459943U (en) * | 2013-09-22 | 2014-03-05 | 福建省威盛机械发展有限公司 | Fine-machining fixing tool for movable arm of fork truck/loader |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103464985A (en) | 2013-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103464985B (en) | The production technology of the swing arm of forklift truck/loading machine and fine finishining fixing tool thereof | |
| CN102642114B (en) | Machining method of perpendicularly intersected hole system of speed reducer body | |
| CN100423889C (en) | Integral welding method for ensuring axiality of two side gudgeons in large sized structural member | |
| CN104470678A (en) | Method and machining device by combined addition of material and shaping | |
| CN102390004A (en) | Method for processing laser cutting combined tool with mathematical model | |
| CN105773073A (en) | Method for manufacturing complex metal part by combining additive manufacturing with milling | |
| CN103447988A (en) | Self-adaptive flexible supporting and positioning mechanism | |
| CN103770046A (en) | High accuracy frame for aircraft assembling tool and machining method thereof | |
| CN105354360A (en) | Method for closed-loop establishment of coordinate measuring control network in aircraft large-component assembling interface finish machining | |
| CN105678023A (en) | Movement parameter identification method of horizontal automatic drilling and riveting machine of aircraft panel | |
| CN108788208B (en) | Boring method for machining intersection angle box hole system | |
| CN103231212A (en) | Processing method for ultralong welding similar parts | |
| CN105397513A (en) | Self-adaptive supporting device of machining clamp | |
| CN102873514A (en) | Method for processing crystallizer copper pipe with upper and lower installation spigots | |
| CN203459943U (en) | Fine-machining fixing tool for movable arm of fork truck/loader | |
| CN104646764A (en) | Machining method of inclination driving gear box body hole system | |
| CN205630030U (en) | A adjustable frock for scarf | |
| CN108465962B (en) | Tailor-welding tool for hook arm upper assembly and production process thereof | |
| CN104191132B (en) | Carriage back door tailor-welding tool | |
| CN104551144A (en) | Milling finish machining method for side wall of difficult-to-cut material or large-size three-dimensional molded surface part | |
| CN101885146B (en) | Assembling and welding process of inclined rail seat of stepping type heating furnace | |
| CN104384840A (en) | Machining method of swinging shaft | |
| CN103894771A (en) | General welding jig applied to manufacturing fully-integral chassis | |
| CN103801886B (en) | The welding seat structure of tailstock after a kind of engineering truck | |
| CN208409013U (en) | A kind of trolley travel mechanism welding machine frame tooling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |