CN114799048A - Scraper conveyor middle groove formwork based on 3D printing forming and integral casting method thereof - Google Patents
Scraper conveyor middle groove formwork based on 3D printing forming and integral casting method thereof Download PDFInfo
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- CN114799048A CN114799048A CN202210626884.6A CN202210626884A CN114799048A CN 114799048 A CN114799048 A CN 114799048A CN 202210626884 A CN202210626884 A CN 202210626884A CN 114799048 A CN114799048 A CN 114799048A
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- 238000009415 formwork Methods 0.000 title claims abstract description 97
- 238000010146 3D printing Methods 0.000 title claims abstract description 89
- 238000005266 casting Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000008569 process Effects 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 244000035744 Hura crepitans Species 0.000 claims description 32
- 230000003014 reinforcing effect Effects 0.000 claims description 29
- 239000004576 sand Substances 0.000 claims description 16
- 238000009416 shuttering Methods 0.000 claims description 15
- 238000007639 printing Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 5
- 238000005056 compaction Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000013461 design Methods 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 4
- 230000005484 gravity Effects 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000005728 strengthening Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 239000006260 foam Substances 0.000 description 3
- 238000010114 lost-foam casting Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
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- 239000003643 water by type Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C13/00—Moulding machines for making moulds or cores of particular shapes
- B22C13/08—Moulding machines for making moulds or cores of particular shapes for shell moulds or shell cores
- B22C13/085—Moulding machines for making moulds or cores of particular shapes for shell moulds or shell cores by investing a lost pattern
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/28—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
Abstract
The application belongs to the technical field of integral casting methods of scraper conveyors at middle sections, and particularly relates to a scraper conveyor middle groove formwork based on 3D printing forming, which comprises a 3D printing middle groove formwork, wherein the 3D printing middle groove formwork comprises a formwork outer shell, a formwork inner shell and a formwork inner cavity formed by wrapping the formwork outer shell and the formwork inner shell. The application also provides a scraper conveyor middle groove integral casting method based on 3D printing forming. According to the method, the middle groove formwork shell is produced by adopting a 3D printing integrated forming technology, and the 3D printing middle groove formwork shell adopts a unique thin-wall hollow structure design, so that the using amount of resin and curing agent of 3D printing raw materials is greatly reduced, and the production cost is reduced; the mechanical strength of the formwork is improved, and the cracking of the formwork in the conveying process is prevented; the method has the advantages that the 3D printing middle groove formwork is prevented from being extruded and cracked under the action of the gravity of molten steel in the casting process, and the defects of a middle groove casting expansion box and flash strip edges are avoided; and the surface pore defect of the middle groove casting is prevented.
Description
Technical Field
The application belongs to the technical field of integral casting methods of scraper conveyors at middle sections, and particularly relates to a scraper conveyor middle groove formwork based on 3D printing forming and an integral casting method thereof.
Background
The supply of coal is related to the stability of the development of the industry of China and the aspect of the whole society, and the problem of the supply safety of coal is also an important link of the energy safety of China. The scraper conveyor is a key device for fully mechanized coal mining and is also an important marking device for realizing mechanization in the coal industry. The mode of driving the scraper to rotate and run in the chain channel through the chain realizes continuous transportation, can realize the integrated operation of loading, transportation and unloading, and has higher working efficiency and degree of automation. The traditional scraper conveyor is produced by adopting a cast-weld process and an overall lost foam casting process. The chute of the scraper conveyor in the cast-weld process is formed by welding all parts, so that hot cracks can exist, and the improvement of the strength and the wear resistance of the chute is limited due to the problems that the materials of all parts of the chute are inconsistent, the strength of a welding seam is influenced by welding materials, the requirement of the welding process on the materials is opposite to the direction of improving the wear resistance of the materials, and the like. Although the problems of poor welding performance and easy cracking under actual working condition and use condition are solved by adopting the lost foam integral casting process production, the problems of large processing difficulty, high production cost and the like caused by the restriction factors of serious deformation, casting box expansion, low size precision and the like in the large-scale steel casting produced by the lost foam process are solved, and the method is not popularized and applied in a large scale in the production of a scraper machine.
Disclosure of Invention
In order to achieve the purpose, the technical scheme adopted by the application is as follows: a middle groove formwork of a scraper conveyor based on 3D printing forming comprises a 3D printing middle groove formwork, wherein the 3D printing middle groove formwork comprises a formwork outer shell, a formwork inner shell and a formwork inner cavity formed by wrapping the formwork outer shell and the formwork inner shell, and the wall thickness of the formwork inner cavity is 20mm to 40 mm.
Preferably, the formwork shell is provided with a plurality of shell net-shaped reinforcing ribs.
Furthermore, a plurality of inner shell net-shaped reinforcing ribs are arranged on the inner shell of the formwork.
Furthermore, the inner shell of the formwork forms a plurality of hollow channels of the inner shell through a plurality of reticular reinforcing ribs of the inner shell, and the outer shell of the formwork forms a plurality of hollow channels of the outer shell through a plurality of reticular reinforcing ribs of the outer shell.
Further, a hollow negative pressure sand box is arranged outside the 3D printing middle groove formwork shell, and a sand box negative pressure pipeline is arranged on the hollow negative pressure sand box.
Furthermore, a pouring channel is arranged on the 3D printing middle groove formwork shell, and a plurality of risers are further arranged on the 3D printing middle groove formwork shell.
The application also provides a 3D printing forming-based integral casting method for the middle groove of the scraper conveyor, wherein a 3D printing technology is adopted to produce a middle groove formwork, and the 3D printing middle groove formwork is of a thin-wall hollow structure; casting the smelted qualified molten steel into a 3D printing middle groove mould shell by adopting a negative pressure casting process to obtain a casting; and cooling and boxing the casting, and then treating a dead head to obtain a middle groove finished product.
Preferably, the method comprises the following steps:
step 1: designing a casting system according to a drawing of a middle groove casting to form a casting process drawing;
step 2: designing a drawing for printing a middle groove formwork in a 3D printing mode according to a 3D printing forming principle;
and step 3: slicing a 3D printing middle groove formwork drawing into a printing program according to a 3D printer slicing method;
and 4, step 4: the 3D printer runs a printing program to print and produce an integral 3D printing middle groove formwork;
and 5: a hollow negative pressure sand box is adopted for dry sand burying and compaction, so that castings are prevented from expanding;
step 6: casting the smelted qualified molten steel into a 3D printing middle groove mould shell by adopting a negative pressure casting process; before casting, a negative pressure pipeline of the sand box is connected with a negative pressure device, plastic cloth at the position of an upper opening of the hollow negative pressure sand box and the side wall of the hollow negative pressure sand box form a closed space, and negative pressure is pumped to form a negative pressure environment of-0.06 to-0.02 Mpa in the hollow negative pressure sand box;
and 7: cooling and boxing the casting, gasifying the resin binder in the 3D printing middle groove formwork at the high temperature of molten steel after the casting is cooled and boxed, and returning the used sand to the printing process for repeated printing after the used sand is simply screened;
and 8: and cleaning casting heads of the castings, detecting after heat treatment, and warehousing after the detection is qualified.
Further, in step 4, the wall thickness of the 3D printing middle groove formwork is 20mm to 40 mm.
Further, in step 4, the 3D printing middle groove formwork comprises a formwork outer shell, a formwork inner shell and a formwork inner cavity formed by wrapping the formwork outer shell and the formwork inner shell, the formwork inner shell is provided with a plurality of inner shell mesh reinforcing ribs, and the formwork outer shell is provided with a plurality of outer shell mesh reinforcing ribs;
the shuttering inner shell forms a plurality of inner shell hollow channels through a plurality of inner shell reticular reinforcing ribs, and the shuttering outer shell forms a plurality of outer shell hollow channels through a plurality of outer shell reticular reinforcing ribs.
According to the invention, the 3D printing integrated forming technology is adopted to produce the casting mould shell, and the 3D printing middle groove mould shell adopts a unique thin-wall hollow structural design to greatly reduce the consumption of 3D printing raw material resin and curing agent, so that the production cost is reduced; the 3D printing middle groove formwork adopts a mesh reinforcing rib design, so that the mechanical strength of the formwork is increased, and the formwork is prevented from cracking in the conveying process; the box burying process adopts a dry sand vibration box burying technology, and prevents a 3D printing middle groove mould shell from being extruded and cracked under the gravity action of molten steel in the casting process to form casting box expansion and flash strip edge defects; the casting process adopts a negative pressure casting process, and gas generated by pyrolysis of the resin curing agent in the casting process is discharged through a negative pressure system, so that the surface pore defect of the casting is prevented.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a flowchart of a method for casting a middle trough as a whole in example 2 of the present invention;
FIG. 2 is a view showing a finished product of a middle tank in example 1 of the present invention;
FIG. 3 is a process diagram of a middle tank in example 1 of the present invention;
fig. 4 is a schematic structural diagram of a 3D printing middle groove formwork in embodiment 1 of the present invention;
FIG. 5 is an internal cross-sectional view of a 3D printed middle channel formwork in embodiment 1 of the present invention;
FIG. 6 is a schematic structural view of inner shell net-like reinforcing ribs and outer shell net-like reinforcing ribs in example 1 of the present invention;
FIG. 7 is a schematic view of negative pressure casting of a 3D printed middle trough mold shell in embodiment 1 of the invention;
the symbols in the drawings illustrate that:
1-pouring channel; 2-a riser; 3-3D printing a middle groove formwork; 4-inner cavity of mould shell; 5-a housing hollow channel; 6-inner shell hollow channel; 7-inner shell net reinforcing ribs; 8-hollow negative pressure sand box; 9-sand box negative pressure pipeline; 10-an inner formwork shell; 11-a formwork shell; 12-shell mesh reinforcement; 13-middle tank finished product.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Example 1
The application provides a fashioned scraper conveyor middle part groove mould shell based on 3D prints, see fig. 2 to 7, including 3D printing middle part groove mould shell 3, 3D prints middle part groove mould shell 3 and includes mould shell 11, mould shell inner shell 10 and by mould shell inner chamber 4 that mould shell 11, mould shell inner shell 10 parcel formed, the wall thickness of mould shell inner chamber 4 is 20mm to 40 mm.
The shuttering outer shell 11 is provided with a plurality of outer shell net-shaped reinforcing ribs 12, and the shuttering inner shell 10 is provided with a plurality of inner shell net-shaped reinforcing ribs 7. The shuttering inner shell 10 forms a plurality of inner shell hollow channels 6 through a plurality of inner shell reticular strengthening ribs 7, and the shuttering outer shell 11 forms a plurality of outer shell hollow channels 5 through a plurality of outer shell reticular strengthening ribs 12. The design of inner shell hollow channel 6 and shell hollow channel 5 can alleviate 3D and print middle part groove mould shell weight, reduces the raw and other materials quantity, reduction in production cost. The outer shell mesh reinforcing ribs 12 and the inner shell mesh reinforcing ribs 7 increase the strength of the 3D printing middle groove formwork 3, and the 3D printing middle groove formwork 3 is prevented from being broken in the lifting process; the air permeability is excellent; the cast product has good surface quality.
The outside of 3D printing middle groove mould shell 3 is provided with cavity negative pressure sand box 8, is provided with sand box negative pressure pipeline 9 on the cavity negative pressure sand box 8.
3D prints and is provided with on the middle part groove mould shell 3 and waters 1, and 3D prints still to be equipped with a plurality of rising heads 2 on the middle part groove mould shell 3.
Example 2
The application also provides a method for integrally casting the middle groove of the scraper conveyor based on 3D printing and forming. As shown in fig. 1, the 3D printing forming-based method for integrally casting the middle groove of the scraper conveyor adopts a 3D printing technology to produce a middle groove formwork, and comprises the following steps:
step 1: designing a casting system according to a drawing of a middle groove casting to form a casting process drawing;
step 2: designing an integral 3D printing middle groove formwork drawing according to a 3D printing forming principle;
and step 3: slicing a 3D printing middle groove formwork drawing into a printing program according to a 3D printer slicing method;
and 4, step 4: the 3D printer runs a printing program to print and produce the integral 3D printing middle groove formwork 3;
and 5: a hollow negative pressure sand box 8 is adopted for dry sand burying and compaction, so that castings are prevented from expanding;
in the box burying process, the 3D printing middle groove formwork 3 is firstly hung into the hollow negative pressure sand box 8, dry sand is filled in a gap between the 3D printing middle groove formwork 3 and the hollow negative pressure sand box 8, and the dry sand can be filled in one time or added in multiple times according to the size of the 3D printing middle groove formwork 3 in the sand filling process. And after sand filling, performing integral jolt ramming on the three-dimensional jolt ramming table, and further compacting the 3D printing middle groove formwork 3 by using dry sand in the jolt ramming process. And covering a layer of plastic cloth at the upper opening position of the hollow negative pressure sand box 8 after the jolt compaction, and transferring the jolt compacted hollow negative pressure sand box 8 to a casting station for casting.
Step 6: and casting the smelted qualified molten steel into the 3D printing middle groove formwork 3 by adopting a negative pressure casting process. 3D prints middle part slot former case 3 and is provided with the netted strengthening rib of inner shell 7 and the netted strengthening rib 12 of shell, and the netted strengthening rib of inner shell 7 and the netted strengthening rib 12 of shell have increased the mould shell intensity, and the netted cavity shape that forms between the strengthening rib makes the mould shell gas permeability good simultaneously.
Before casting, the negative pressure pipeline 9 of the sand box is connected with a negative pressure device, the plastic cloth at the position of the upper opening of the hollow negative pressure sand box 8 and the side wall of the hollow negative pressure sand box 8 form a closed space, and negative pressure is pumped to form a negative pressure environment of-0.06 to-0.02 Mpa, preferably a negative pressure environment of-0.04 Mpa in the hollow negative pressure sand box 8; molten steel enters the inner cavity 4 of the mold shell through the pouring gate 1 in the casting process, the molten steel is stably injected from the bottom of the 3D printing middle groove mold shell 3 through the pouring gate 1, and resin curing agent gas gasified at high temperature in the casting process is instantaneously discharged out of the inner cavity 4 of the mold shell under the action of negative pressure, so that the casting process is stable, and no gas remains on the surface of the molten steel; the casting surface quality is excellent.
And 7: the casting is cooled and boxed, after the casting is cooled and boxed, the resin binder in the 3D printing middle groove formwork 3 is gasified at the high temperature of molten steel, the used sand is simply screened and then returns to the printing process for repeated printing, the 3D printing production cost is reduced, no solid waste is generated in the production process, and the production process is green and environment-friendly.
And step 8: and cleaning casting heads of the castings, detecting after heat treatment, obtaining a middle trough finished product 13 after qualified detection, and warehousing.
The 3D printing middle groove formwork 3 in the step 4 comprises a formwork outer shell 11, a formwork inner shell 10 and a formwork inner cavity 4 formed by wrapping the formwork outer shell 11 and the formwork inner shell 10, and the wall thickness of the formwork inner cavity 4 is 20mm to 40 mm.
The shuttering outer shell 11 is provided with a plurality of outer shell net-shaped reinforcing ribs 12, and the shuttering inner shell 10 is provided with a plurality of inner shell net-shaped reinforcing ribs 7. The shuttering inner shell 10 forms a plurality of inner shell hollow channels 6 through a plurality of inner shell reticular strengthening ribs 7, and the shuttering outer shell 11 forms a plurality of outer shell hollow channels 5 through a plurality of outer shell reticular strengthening ribs 12. The design of inner shell hollow channel 6 and shell hollow channel 5 can alleviate 3D and print middle part groove mould shell weight, reduces the raw and other materials quantity, reduction in production cost. The strength of the 3D printing middle groove formwork shell 3 is improved by the outer shell net-shaped reinforcing ribs 12 and the inner shell net-shaped reinforcing ribs 7, and the 3D printing middle groove formwork shell 3 is prevented from being broken in the lifting process; the air permeability is excellent; the cast product has good surface quality.
The outside of the 3D printing middle groove formwork 3 is provided with a hollow negative pressure sand box 8, and a sand box negative pressure pipeline 9 is arranged on the hollow negative pressure sand box 8.
3D prints and is provided with on the middle part groove mould shell 3 and waters 1, and 3D prints still to be equipped with a plurality of rising heads 2 on the middle part groove mould shell 3.
The results of the present invention are shown in table 1 in comparison with the results of the measurement of the dimensions of the middle trough produced by the conventional lost foam casting process. The detection tool adopts a caliper and a box ruler for detection.
Table 1:
| examples of the invention | Middle plate thickness (25 mm) | Thickness of the soleplate (20 mm) | Ledge height (315 mm) | Notch width (764 mm) |
| Lost foam process | 27-29mm | 22-25mm | 319mm | 762-768mm |
| Example 2 | 25-26mm | 20-21mm | 315mm | 765mm |
As can be seen from Table 1, the sizes of the middle grooves prepared by the method are smaller than those of the middle grooves produced by the traditional lost foam casting process, and the wall thickness of the 3D printing middle groove formwork can be as low as 20 mm.
According to the invention, the 3D printing integrated forming technology is adopted to produce the casting mould shell, and the 3D printing middle groove mould shell adopts a unique thin-wall hollow structural design to greatly reduce the consumption of 3D printing raw material resin and curing agent, so that the production cost is reduced; the 3D printing middle groove formwork adopts a mesh reinforcing rib design, so that the mechanical strength of the formwork is increased, and the formwork is prevented from cracking in the conveying process; the box burying process adopts a dry sand vibration box burying technology, and prevents a 3D printing middle groove mould shell from being extruded and cracked under the gravity action of molten steel in the casting process to form casting box expansion and flash strip edge defects; the casting process adopts a negative pressure casting process, and gas generated by pyrolysis of the resin curing agent in the casting process is discharged through a negative pressure system, so that the surface pore defect of the casting is prevented.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. Scraper conveyor middle part groove mould shell based on 3D prints fashioned, its characterized in that: including 3D printing middle part groove mould shell, 3D prints middle part groove mould shell and includes mould shell, mould shell inner shell and by the mould shell inner chamber of mould shell outer shell, mould shell inner shell parcel formation, the wall thickness of mould shell inner chamber is 20mm to 40 mm.
2. The profiled scraper conveyor middle trough form of claim 1 based on 3D printing, characterized in that: the shell of the mould shell is provided with a plurality of shell net-shaped reinforcing ribs.
3. The profiled scraper conveyor middle trough form of claim 2 based on 3D printing, characterized in that: the inner shell of the shuttering is provided with a plurality of inner shell net-shaped reinforcing ribs.
4. The profiled scraper conveyor middle trough form of claim 3 based on 3D printing, characterized in that: the shuttering inner shell forms a plurality of inner shell hollow channels through a plurality of inner shell reticular reinforcing ribs, and the shuttering outer shell forms a plurality of outer shell hollow channels through a plurality of outer shell reticular reinforcing ribs.
5. The profiled scraper conveyor middle trough form of claim 1 based on 3D printing, characterized in that: a hollow negative pressure sand box is arranged outside the middle groove formwork body in the 3D printing mode, and a sand box negative pressure pipeline is arranged on the hollow negative pressure sand box.
6. The profiled scraper conveyor middle trough form of claim 1 based on 3D printing, characterized in that: the 3D printing middle groove die shell is provided with a pouring gate, and the 3D printing middle groove die shell is also provided with a plurality of dead heads.
7. 3D printing forming-based integral casting method for middle groove of scraper conveyor, and is characterized in that: the middle groove formwork is produced by adopting a 3D printing technology, and the 3D printing middle groove formwork is of a thin-wall hollow structure; casting the smelted qualified molten steel into a 3D printing middle groove mould shell by adopting a negative pressure casting process to obtain a casting; and cooling and boxing the casting, and then treating a dead head to obtain a middle groove finished product.
8. The 3D printing forming-based scraper conveyor middle groove integral casting method according to claim 7, characterized in that: the method comprises the following steps:
step 1: designing a casting system according to a drawing of a middle groove casting to form a casting process drawing;
step 2: designing an integral 3D printing middle groove formwork drawing according to a 3D printing forming principle;
and step 3: slicing a 3D printing middle groove formwork drawing into a printing program according to a 3D printer slicing method;
and 4, step 4: the 3D printer runs a printing program to print and produce an integral 3D printing middle groove formwork;
and 5: a hollow negative pressure sand box is adopted for dry sand burying and compaction, so that castings are prevented from expanding;
and 6: casting the smelted qualified molten steel into a 3D printing middle groove mould shell by adopting a negative pressure casting process; before casting, a negative pressure pipeline of the sand box is connected with a negative pressure device, a plastic cloth at the position of an upper opening of the hollow negative pressure sand box and the side wall of the hollow negative pressure sand box form a closed space, and negative pressure is pumped to form a negative pressure environment of-0.06-0.02 Mpa in the hollow negative pressure sand box;
and 7: cooling and boxing the casting, gasifying the resin binder in the 3D printing middle groove formwork at the high temperature of molten steel after the casting is cooled and boxed, and returning the used sand to the printing process for repeated printing after the used sand is simply screened;
and step 8: and cleaning casting heads of the castings, detecting after heat treatment, and warehousing after the detection is qualified.
9. The 3D printing forming-based scraper conveyor middle groove integral casting method according to claim 8, characterized in that: in the step 4, the wall thickness of the middle groove formwork in the 3D printing is 20mm to 40 mm.
10. The 3D printing forming-based scraper conveyor middle groove integral casting method according to claim 8, characterized in that: in the step 4, the 3D printing middle groove formwork comprises a formwork outer shell, a formwork inner shell and a formwork inner cavity formed by wrapping the formwork outer shell and the formwork inner shell, wherein the formwork inner shell is provided with a plurality of inner shell net-shaped reinforcing ribs, and the formwork outer shell is provided with a plurality of outer shell net-shaped reinforcing ribs;
the shuttering inner shell forms a plurality of inner shell hollow channels through a plurality of inner shell reticular reinforcing ribs, and the shuttering outer shell forms a plurality of outer shell hollow channels through a plurality of outer shell reticular reinforcing ribs.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210626884.6A CN114799048A (en) | 2022-06-06 | 2022-06-06 | Scraper conveyor middle groove formwork based on 3D printing forming and integral casting method thereof |
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| CN202210626884.6A CN114799048A (en) | 2022-06-06 | 2022-06-06 | Scraper conveyor middle groove formwork based on 3D printing forming and integral casting method thereof |
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