CN113146137A - Positioning die structure for tank body of mixer truck - Google Patents
Positioning die structure for tank body of mixer truck Download PDFInfo
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- CN113146137A CN113146137A CN202110103922.5A CN202110103922A CN113146137A CN 113146137 A CN113146137 A CN 113146137A CN 202110103922 A CN202110103922 A CN 202110103922A CN 113146137 A CN113146137 A CN 113146137A
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- 238000003756 stirring Methods 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 238000002156 mixing Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 240000007817 Olea europaea Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/12—Vessels
- B23K2101/125—Cans
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention discloses a positioning die structure of a tank body of a mixer truck, which comprises an outer frame assembly, a positioning die and a positioning die, wherein the outer frame assembly comprises two oppositely arranged frames and a plurality of stand columns, and two ends of each stand column are connected to the two frames; the pressing assembly is connected with one of the frames; the compressing assembly is used for compressing the tank body placed in the outer frame assembly; the tank positioning assembly is positioned on the inner side of the outer frame assembly and connected with the plurality of stand columns. The application provides a stirring truck jar body positioning die structure, simple structure is reasonable, installation convenient to use. The die capable of being adjusted mechanically, electrically and hydraulically is formed, and after each tank type can be positioned by the same die, the stirring blades can be welded at high precision. The size of each section can be simply adjusted, and a set of die is adapted to the tank types with different sizes and sizes. Is worthy of large-area popularization and application.
Description
Technical Field
The invention relates to the technical field of stirring tank production, in particular to a positioning die structure of a stirring tank body.
Background
A mixer truck, which is a special truck for transporting concrete for construction; due to its shape, it is also commonly referred to as a river snail vehicle, olive vehicle. These trucks are equipped with cylindrical mixing drums to carry the mixed concrete. The mixing drum can be always kept to rotate in the transportation process so as to ensure that the carried concrete can not be solidified. After the concrete is conveyed, water is usually used for flushing the interior of the mixing drum, so that the occupied space of the hardened residual concrete is prevented, and the volume of the mixing drum is reduced.
The concrete mixing and transporting truck consists of a vehicle chassis and a special device for concrete mixing and transporting. The special mechanism mainly comprises a power takeoff, a front support and a rear support of a mixing drum, a speed reducer, a hydraulic system, the mixing drum, an operating mechanism, a cleaning system and the like. The operating principle is that the power of the automobile chassis is taken out through the power take-off device, the variable pump of the hydraulic system is driven, mechanical energy is converted into hydraulic energy to be transmitted to the variable motor, the motor drives the speed reducer again, and the speed reducer drives the stirring device to stir concrete.
The tank body of the concrete mixing truck generally comprises a front cone, a middle section and a rear cone, and stirring blades are arranged in the tank body. The tank body is usually manufactured in sections, then the stirring blades in each section are welded, and then the tank body is assembled into an integral structure. Because the stirring blade usually needs to be supported by a die in the welding process, the stirring blade is placed at a corresponding position and then welded. Because the jar body is various, and each kind jar body all is different for each kind jar body all needs the different mould of adaptation when carrying out blade welding, so need often make new mould according to the shape and the size of jar body, cause the waste of time and resource.
Disclosure of Invention
The invention provides a positioning die structure of a tank body of a mixer truck.
The invention provides the following scheme:
the utility model provides a stirring truck jar body positioning die structure, includes:
the outer frame assembly comprises two oppositely arranged frames and a plurality of upright posts, and the two ends of each upright post are connected to the two frames;
the pressing assembly is connected with one of the frames; the compressing assembly is used for compressing the tank body placed in the outer frame assembly;
the tank positioning assembly is positioned on the inner side of the outer frame assembly and is connected with the stand columns; the tank positioning assembly can be subjected to position change along the axial direction of the upright column so as to adjust the distance between the tank positioning assembly and the pressing assembly.
Preferably: the upright posts are respectively provided with a slideway extending along the respective axial direction, and the tank body positioning assembly is connected with the slideways in a matching way; the tank body positioning assembly is arranged on the outer frame assembly and is connected with the telescopic driving assembly through a connecting rod.
Preferably: the tank body positioning assembly comprises a plurality of connecting pieces, and the connecting pieces and the upright columns are arranged in a one-to-one correspondence mode and are connected with the corresponding upright columns through bolts and selected positioning holes.
Preferably: each all be connected with regulation formula connecting plate on the stand, it is a plurality of the locating hole forms in on the regulation formula connecting plate.
Preferably: the tank body positioning assembly comprises a rear cone closed end positioning assembly, and the rear cone closed end positioning assembly comprises a feed inlet positioning die and a lower opening positioning die which are connected; and the connecting pieces are detachably connected with the lower opening positioning die respectively.
Preferably: the tank body positioning assembly comprises a raceway positioning assembly, the raceway positioning assembly comprises a raceway supporting member, and the raceway supporting member is detachably connected with the connecting piece.
Preferably: the raceway support member has a trapezoidal structure.
Preferably: the tank body positioning assembly comprises a front cone closed end positioning assembly, and the front cone closed end positioning assembly comprises a seal head supporting plate, a seal head fixing plate and a seal head flange positioning plate which are connected; the seal head supporting plate is detachably connected with the seal head fixing plate and the connecting piece respectively.
Preferably: the end socket fixing plate and the end socket flange positioning plate are connected through reinforcing ribs.
Preferably: the pressing assembly comprises a plurality of oil cylinders; an upper opening die is arranged on the frame, a plurality of oil cylinder guide columns are connected to the frame, and the oil cylinder guide columns are connected with the upper opening die in a hole matching connection mode; the oil cylinders are in one-to-one corresponding matched connection with the upper dies; and one end of each oil cylinder piston rod, which is positioned outside the outer frame assembly, is connected with a profiling stop block respectively.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
according to the invention, the positioning die structure of the tank body of the mixer truck can be realized, and in an implementation mode, the positioning die structure can comprise an outer frame assembly, wherein the outer frame assembly comprises two oppositely arranged frames and a plurality of upright posts, and the two ends of each upright post are connected to the two frames; the pressing assembly is connected with one of the frames; the compressing assembly is used for compressing the tank body placed in the outer frame assembly; the tank positioning assembly is positioned on the inner side of the outer frame assembly and is connected with the stand columns; the tank positioning assembly can be subjected to position change along the axial direction of the upright column so as to adjust the distance between the tank positioning assembly and the pressing assembly. The application provides a stirring truck jar body positioning die structure, simple structure is reasonable, installation convenient to use. The die capable of being adjusted mechanically, electrically and hydraulically is formed, and after each tank type can be positioned by the same die, the stirring blades can be welded at high precision. The size of each section can be simply adjusted, and a set of die is adapted to the tank types with different sizes and sizes. Is worthy of large-area popularization and application.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a first structural schematic diagram (for a rear cone mold) of a positioning mold structure of a tank body of a mixer truck according to an embodiment of the present invention;
FIG. 2 is a front view of FIG. 1 provided by an embodiment of the present invention;
FIG. 3 is a second structural schematic diagram (for a front cone mold) of a positioning mold structure for a tank body of a mixer truck according to an embodiment of the present invention;
FIG. 4 is a schematic view of a connection mode between an oil cylinder guide post and an upper die provided by the embodiment of the invention;
fig. 5 is a top view of a can mold provided by an embodiment of the present invention.
In the figure: the device comprises a frame 1, a stand column 2, a positioning hole 3, a connecting piece 4, an adjustable connecting plate 5, a feed inlet positioning die 6, a lower opening positioning die 7, a raceway supporting member 8, a seal head supporting plate 9, a seal head fixing plate 10, a seal head flange positioning plate 11, a reinforcing rib 12, an oil cylinder 13, an oil cylinder guide column 14 and an upper opening die 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Examples
Referring to fig. 1, fig. 2, fig. 3, and fig. 4, a positioning mold structure for a tank body of a mixer truck according to an embodiment of the present invention, as shown in fig. 1, fig. 2, fig. 3, and fig. 4, the positioning mold structure may include:
the frame assembly comprises two oppositely arranged frames 1 and a plurality of upright posts 2, wherein two ends of each upright post are connected to the two frames 1; in practical applications, the outer frame assembly may include various forms, for example, the outer frame may have a hexagonal structure, which is more stable than a structure that is supported between the upper circular plate and the lower circular plate, and is easy to shape and reduce manufacturing errors. Meanwhile, the hexagonal honeycomb frame is low in manufacturing difficulty.
The pressing assembly is connected with one of the frames 1; the compressing assembly is used for compressing the tank body placed in the outer frame assembly; the pressing assembly is used for placing the corresponding tank body inside the outer frame assembly and then pressing the tank body after the position of the tank body positioning assembly is adjusted, so that the tank body is prevented from moving when the blades are welded, and the quality of the blade welding is influenced.
The tank positioning assembly is positioned on the inner side of the outer frame assembly and is connected with the plurality of stand columns 2; the tank positioning component can be changed in position along the axial direction of the upright post 2 so as to adjust the distance between the tank positioning component and the pressing component.
The mould structure that this application embodiment provided can adjust jar body locating component's position to the jar body that adapts to different length uses. When the position adjustment is realized, any mode in the prior art which can realize the position adjustment of the tank body positioning component relative to the upright post can be adopted. For example, in one implementation, the embodiment of the present application may provide that a plurality of the columns are respectively formed with a slideway (not shown in the drawings) extending along respective axial directions, and the tank positioning assembly is connected to the slideways in a matching manner; the tank body positioning assembly is arranged on the outer frame assembly and is connected with the telescopic driving assembly through a connecting rod. The slide way is arranged on the stand column, and the tank body positioning assembly is driven to move along the axial direction of the stand column through the electric or hydraulic telescopic device, so that the position of the tank body positioning assembly can be adjusted.
In order to reduce the manufacturing cost and further simplify the manufacturing difficulty of the mold structure, in another implementation manner, the embodiment of the present application may further provide a plurality of positioning holes 3 formed along the axial direction of the stand column respectively, the tank positioning assembly includes a plurality of connecting members 4, and the plurality of connecting members 4 and the plurality of stand columns 2 are arranged in a one-to-one correspondence manner and connected with the corresponding stand columns 2 through bolts and the selected positioning holes 3. The position of the connecting piece 4 relative to the positioning hole 3 on the upright post 2 is adjusted, so that the adjustment of the tank body positioning assembly along the axial position of the upright post can be realized. In order to guarantee the precision of locating hole after offering, this application embodiment can also provide each all be connected with regulation formula connecting plate 5 on the stand 2, it is a plurality of locating hole 3 is formed in regulation formula connecting plate 5 is last. Through this regulation formula connecting plate can conveniently adjust the inboard straightness that hangs down and the roughness of stand. The position of the arranged positioning hole is ensured to be accurate.
It can be understood that the die structure provided by the application can be used for positioning the rear cone tank body and also can be used for positioning the front cone tank body. For example, when the structure is used for positioning a rear cone tank body, the tank body positioning assembly comprises a rear cone closed end positioning assembly, and the rear cone closed end positioning assembly comprises a feed inlet positioning die 6 and a lower opening positioning die 7 which are connected with each other; the connecting pieces 4 are detachably connected with the lower opening positioning die 7 respectively. The adjusting connecting plate is connected with the connecting piece through a bolt and can be adjusted up and down, when the height of the rear cone is changed, the bolt is detached and installed in a proper positioning hole, and the position of the lower opening positioning die is adjusted. The lower opening connecting piece is connected with the lower opening positioning die through the bolts, and when the size of the lower opening is changed, only an independent lower opening positioning die plate needs to be replaced, so that the operation is simple and rapid. The feeding hole positioning die is connected with the lower opening positioning die through bolts, and when the size of the feeding hole changes, the new feeding hole positioning die is replaced. The adjustable connecting plate and the lower opening connecting piece can be adjusted up and down by using the positioning holes, and can also be adjusted by using rail electric adjustment, hydraulic cylinder stretching up and down and sleeve pin inserting mode. The lower opening positioning die, the feed inlet positioning die and the lower opening connecting piece are all connected by bolts and pins, so that the die can be accurately positioned under the condition of ensuring the strength of the die, and the concentricity of the tank body is ensured.
In order to ensure that the raceway can be positioned when the positioning device is used for positioning the rear cone tank, the embodiment of the application may provide that the tank positioning assembly includes a raceway positioning assembly, the raceway positioning assembly includes a raceway supporting member 8, and the raceway supporting member 8 is detachably connected to the connecting member 4. In particular, the raceway support member 8 has a trapezoidal structure. The adjusting connecting plate is connected with the connecting piece through a bolt and can be adjusted up and down, when the distance of the roller path is changed relative to the upper opening, the bolt is detached and installed in a proper positioning hole, and the roller path is adjusted. The raceway connecting piece and the raceway supporting piece are connected through bolts, and the raceway supporting piece is of a trapezoidal structure and is adaptive to raceways with different sizes. When a special raceway or a raceway connecting piece deforms, only one single plate needs to be replaced, and the method is simple and rapid. The adjustable connecting plate and the raceway connecting piece can be adjusted up and down by using the positioning holes, and can also be adjusted by using rail electric adjustment, hydraulic cylinder stretching up and down and sleeve pin inserting mode.
When the structure is used for positioning a front cone tank body, the tank body positioning assembly comprises a front cone closed end positioning assembly, and the front cone closed end positioning assembly comprises a seal head supporting plate 9, a seal head fixing plate 10 and a seal head flange positioning plate 11 which are connected; the end socket supporting plate 9 is detachably connected with the end socket fixing plate 10 and the connecting piece 4 respectively. Specifically, the end socket fixing plate 10 and the end socket flange positioning plate 11 are connected through a reinforcing rib 12. The end socket supporting plate is used for supporting the whole end socket and the front cone. The end socket fixing plate is connected with the end socket supporting plate through bolts and can be replaced according to different end sockets. The machined end socket positioning flange can be positioned with the end socket flange, and the concentricity of the tank body is ensured. For heads of different heights, the adjustment can be carried out between the head support plate and the connecting piece by using a cushion block, a hydraulic device and an electric device. The double-layer plate positioning reinforcing ribs are utilized, and finally the upper end socket fixing plate is welded, so that the strength is improved, and meanwhile, the volume is positioned. The end socket supporting plate and the end socket flange positioning plate can be mutually separated, and the hydraulic system or the electric system is independently used for realizing the adjustment of the upper height and the lower height.
Further, the pressing assembly comprises a plurality of oil cylinders 13; an upper opening die 15 is arranged on the frame 1, a plurality of oil cylinder guide posts 14 are connected to the frame 1, and the oil cylinder guide posts 14 are connected with the upper opening die 15 in a hole matching connection mode; the oil cylinders 13 are correspondingly matched and connected with the upper dies 15 one by one; one end of each cylinder 13, which is located outside the outer frame assembly, is connected to a profiling stopper (not shown). The tapping inner screw of the upper opening die (oil cylinder connecting plate) is welded with the outer frame, and the oil cylinder is connected with the oil cylinder connecting plate through bolts, so that the disassembly and maintenance are convenient. The middle of a piston rod of the oil cylinder is provided with a pin hole which is fixed with the profiling stop block by a pin. The structure of the profiling stop block can adopt a profiling tank body with a structure that a shaft sleeve is matched with a pin, and when the tank body needs to be drawn out, the profiling stop block can be directly rotated. The structure of the profiling stop block can adopt a profiling tank body with a structure that a vertical plate with a pin hole is matched with a pin, and when the tank body needs to be drawn out, a pin can be directly drawn out to turn over the profiling stop block so as to draw a die.
It can be understood that, in order to further improve the overall assembly precision of the tank body, after the stirring blades inside the front cone and the rear cone are welded by using the positioning die structure, as shown in fig. 5, the front cone, the middle section and the rear cone can be assembled by using the tank die assembly. The tank mould can also adopt a mode of adjusting the positioning height of the tank body, and ensure that the tank mould can be suitable for assembling and positioning the tank bodies with various sizes.
In a word, the stirring truck tank body positioning die structure that this application provided, simple structure is reasonable, installation convenient to use. The die capable of being adjusted mechanically, electrically and hydraulically is formed, and after each tank type can be positioned by the same die, the stirring blades can be welded at high precision. The size of each section can be simply adjusted, and a set of die is adapted to the tank types with different sizes and sizes. Is worthy of large-area popularization and application.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a stirring truck jar body positioning die structure which characterized in that includes:
the outer frame assembly comprises two oppositely arranged frames and a plurality of upright posts, and the two ends of each upright post are connected to the two frames;
the pressing assembly is connected with one of the frames; the compressing assembly is used for compressing the tank body placed in the outer frame assembly;
the tank positioning assembly is positioned on the inner side of the outer frame assembly and is connected with the stand columns; the tank positioning assembly can be subjected to position change along the axial direction of the upright column so as to adjust the distance between the tank positioning assembly and the pressing assembly.
2. The structure of the mixer truck tank positioning mold according to claim 1, wherein a plurality of the columns are respectively formed with a slide way extending along the respective axial direction, and the tank positioning assembly is connected with the slide ways in a matching manner; the tank body positioning assembly is arranged on the outer frame assembly and is connected with the telescopic driving assembly through a connecting rod.
3. The mixer truck tank positioning die structure according to claim 1, wherein a plurality of positioning holes are formed in each of the plurality of columns in the axial direction thereof, and the tank positioning assembly includes a plurality of connecting members, the plurality of connecting members being arranged in one-to-one correspondence with the plurality of columns and connected to the corresponding columns through bolts and selected positioning holes.
4. The mixer truck tank positioning die structure as set forth in claim 3, wherein each of said columns is connected with an adjustable connecting plate, and a plurality of said positioning holes are formed in said adjustable connecting plate.
5. The structure of the positioning die for the tank body of the mixer truck according to claim 3, wherein the positioning assembly for the tank body comprises a positioning assembly for the tapered end of the rear cone, and the positioning assembly for the tapered end of the rear cone comprises a feeding port positioning die and a lower port positioning die which are connected with each other; and the connecting pieces are detachably connected with the lower opening positioning die respectively.
6. The mixer truck tank positioning die structure according to claim 3, wherein the tank positioning assembly comprises a raceway positioning assembly, the raceway positioning assembly comprising a raceway support member, the raceway support member being detachably connected to the connecting member.
7. The mixer truck tank positioning die structure of claim 6 in which the raceway support members have a trapezoidal configuration.
8. The structure of the positioning die for the tank body of the mixer truck as recited in claim 3, wherein the positioning assembly for the tank body comprises a positioning assembly for a front cone closed end, and the positioning assembly for the front cone closed end comprises a seal head supporting plate, a seal head fixing plate and a seal head flange positioning plate which are connected with each other; the seal head supporting plate is detachably connected with the seal head fixing plate and the connecting piece respectively.
9. The mixer truck tank positioning die structure according to claim 8, wherein the head fixing plate and the head flange positioning plate are connected by a reinforcing rib.
10. The mixer truck tank positioning die structure of claim 1, wherein the hold-down assembly includes a plurality of cylinders; an upper opening die is arranged on the frame, a plurality of oil cylinder guide columns are connected to the frame, and the oil cylinder guide columns are connected with the upper opening die in a hole matching connection mode; the oil cylinders are in one-to-one corresponding matched connection with the upper dies; and one end of each oil cylinder piston rod, which is positioned outside the outer frame assembly, is connected with a profiling stop block respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110103922.5A CN113146137A (en) | 2021-01-26 | 2021-01-26 | Positioning die structure for tank body of mixer truck |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110103922.5A CN113146137A (en) | 2021-01-26 | 2021-01-26 | Positioning die structure for tank body of mixer truck |
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| CN113146137A true CN113146137A (en) | 2021-07-23 |
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| CN202110103922.5A Pending CN113146137A (en) | 2021-01-26 | 2021-01-26 | Positioning die structure for tank body of mixer truck |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114918603A (en) * | 2022-06-01 | 2022-08-19 | 洛阳中集凌宇汽车有限公司 | Welding positioning tool for front cone assembly of concrete mixing transport vehicle |
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