CN111872325B - Coupler body casting process - Google Patents
Coupler body casting process Download PDFInfo
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- CN111872325B CN111872325B CN202010927220.4A CN202010927220A CN111872325B CN 111872325 B CN111872325 B CN 111872325B CN 202010927220 A CN202010927220 A CN 202010927220A CN 111872325 B CN111872325 B CN 111872325B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
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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
- B22C7/06—Core boxes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
Abstract
The invention relates to the technical field of casting, and provides a coupler body casting process, which comprises the following steps: processing and manufacturing a metal mold, a hook body tail inner baffle sand core box and a hook body inner cavity integral sand core box; manufacturing an upper sand mold and a lower sand mold by using an upper mold and a lower mold respectively; manufacturing a hook body tail inner baffle sand core and a hook body inner cavity integral sand core by respectively utilizing a hook body tail inner baffle sand core box and a hook body inner cavity integral sand core box; putting the hook tail inner baffle sand core and the hook inner cavity integral sand core into an upper sand mold and a lower sand mold and performing box combination; smelting materials and pouring a sand mold; and (5) shakeout to obtain the coupler body of the car coupler. In the casting process, the heat-insulating side riser can effectively feed a heat node in the impact nest, the shrinkage cavity and shrinkage porosity tendency in the impact nest is eliminated, the heat-insulating riser feeds the heat node below the lower traction table, the shrinkage cavity and shrinkage porosity defect tendency below the traction table is greatly weakened, and therefore the coupler body with higher quality is obtained.
Description
Technical Field
The invention relates to the technical field of casting, in particular to a casting process of a coupler body of a coupler.
Background
The coupler is an important part for connecting and buffering railway rolling stocks, and has higher and higher requirements on the performances of the coupler and a buffer, such as rigidity, strength, quality, capacity, wear resistance and the like along with the continuous increase of the total load of a single train of a railway.
The conventional 102-type coupler can meet various locomotive models and has a wide application range, and the 102-type coupler body is a key part of the coupler and bears large load and high-frequency impact shock load in the running process of a locomotive, so that the quality of coupler body castings must be strictly ensured. As the head part of the 102-type car hook body is complex in structure and the wall thickness of the tail part is greatly changed, the defects of shrinkage cavity and shrinkage porosity are easily generated in the casting production process, and a lot of difficulties are caused to the casting process design.
In the prior art, the inner chill is arranged at the position of a shrinkage cavity of a hook body, which is easy to shrink, but the inner chill can not be well organically combined with the metal of the hook body during casting, so that the chill is easy to crack, and potential safety hazards exist.
Disclosure of Invention
The invention provides a casting process of a coupler body of a coupler, which aims to obtain the coupler body of the coupler with higher quality.
The invention provides a casting process of a car coupler body, which comprises the following steps:
the manufacturing method comprises the following steps of processing and manufacturing a metal mould, a hook body tail inner gear sand core box and a hook body inner cavity integral sand core box, wherein the metal mould comprises an upper mould and a lower mould, a first positioning block is arranged on the metal mould, the first positioning block is close to a hook body lower impact pit of the metal mould, a second positioning block is arranged on the hook body inner cavity integral sand core box, and the second positioning block is arranged adjacent to a lower traction table of the hook body inner cavity integral sand core box;
respectively manufacturing an upper sand mold and a lower sand mold by using an upper mold and a lower mold, wherein when the lower sand mold is manufactured by using the lower mold, a heat-insulating side riser is arranged on the first positioning block;
manufacturing the hook body tail inner baffle sand core and the hook body inner cavity integral sand core by respectively utilizing the hook body tail inner baffle sand core box and the hook body inner cavity integral sand core box, wherein when the hook body inner cavity integral sand core is manufactured by utilizing the hook body inner cavity integral sand core box, a heat-insulating riser is arranged on the second positioning block;
putting the hook tail inner baffle sand core and the hook inner cavity integral sand core into an upper sand mold and a lower sand mold and performing box combination;
smelting materials and pouring a sand mold;
and (5) shakeout to obtain the coupler body of the car coupler.
In one embodiment of the invention, a third positioning block is arranged at the tail part of a coupler of a metal mold, and an upper sand mold is manufactured by using the upper mold, which comprises the following steps:
coating a release agent on the surface of the upper die;
a first riser is arranged at the highest position of the head of the hook body, and a second riser is arranged on the third positioning block;
and covering and fixing the upper die, the first riser and the second riser by using the modified sodium silicate sand, placing a sand box, filling the modified sodium silicate sand into the sand box, and compacting and hardening.
In one embodiment of the present invention, a lower sand mold is manufactured using a lower mold, including:
coating a release agent on the surface of the lower die;
arranging a heat-insulating side riser on the first positioning block;
placing a first chilling material at a T-shaped hot joint on the bottom surface of the tail part of the metal mold;
and covering and fixing the lower die, the heat-preservation side riser and the first chilling material by using the modified sodium silicate sand, placing a sand box, filling the modified sodium silicate sand into the sand box, and compacting and hardening.
In one embodiment of the invention, a feeding channel is arranged on the hook body tail inner barrier sand core box, the feeding channel is arranged opposite to a tail pin hole of the hook body tail inner barrier sand core box, and the hook body tail inner barrier sand core with the feeding channel is prepared by utilizing the hook body tail inner barrier sand core box and the modified sodium silicate sand.
In one embodiment of the invention, the diameter of the feeding passage is equal to the diameter of the tail pin bore.
In one embodiment of the invention, when the hook body tail inner barrier sand core box is used for manufacturing the hook body tail inner barrier sand core, chilling materials are placed on the lower surface of the hook body tail inner barrier sand core box, wherein modified sodium silicate sand is used for manufacturing the hook body tail inner barrier sand core.
In one embodiment of the invention, the hook body cavity integral sand core is manufactured by using a hook body cavity integral sand core box, and the method comprises the following steps:
a heat-insulating riser is arranged on the second positioning block;
and filling a second chilling material into the drop lock hole of the hook body inner cavity integral sand core box, compacting, and starting core shooting by a horizontal parting core shooter to obtain the hook body inner cavity integral sand core.
In one embodiment of the invention, the sand shooting pressure of the horizontal parting core shooter is 0.45MPa, the CO2 blowing pressure is 0.3MPa, the blowing hardening time is 100s, and the loose core box is extracted when the blowing hardening is 60 s.
In one embodiment of the invention, the chemical components of the smelted metal material comprise C, Si, Mn, P, S, Cr, Mo, Ni, Al and Fe elements;
wherein, the content of C is 0.24 to 0.29 percent, the content of Si is 0.22 to 0.36 percent, the content of Mn is 1.30 to 1.50 percent, the content of P is less than or equal to 0.027 percent, the content of S is less than or equal to 0.027 percent, the content of Cr is 0.40 to 0.60 percent, the content of Mo is 0.20 to 0.30 percent, the content of Ni is 0.35 to 0.55 percent, the content of Al is 0.02 to 0.08 percent, and the balance is Fe.
In one embodiment of the invention, a 10t bottom pouring type steel ladle is used for pouring in the pouring process, the diameter of a ladle hole is 60mm, the pouring temperature is 1550-1580 ℃, the pouring speed is 20kg/S, pouring is carried out according to the principle of slow, fast and slow, point pouring is carried out for 2-3 times after a sand mold is fully poured, sand falling is carried out after heat preservation is carried out for 8 hours after pouring is finished to obtain a blank casting, and the blank casting is cleaned after being subjected to preheating treatment to obtain the coupler body.
The coupler body casting process comprises the steps of manufacturing a metal mold, a core box of the inner baffle sand core at the tail part of the coupler body and a core box of the integral sand core of the inner cavity of the coupler body, manufacturing a sand mold, the core box of the inner baffle sand core at the tail part of the coupler body and the core box of the integral sand core of the inner cavity of the coupler body by using the metal mold, the core box of the inner baffle sand core at the tail part of the coupler body and the core box of the integral sand core of the inner cavity of the coupler body, casting the sand mold by using a smelted material after the box is closed, and finally performing sand falling to obtain the coupler body. In the casting process, the heat-insulating side riser can effectively feed a heat node in the impact nest, the shrinkage cavity and shrinkage porosity tendency in the impact nest is eliminated, the heat-insulating riser feeds the heat node below the lower traction table, the shrinkage cavity and shrinkage porosity defect tendency below the traction table is greatly weakened, and therefore the coupler body with higher quality is obtained.
Drawings
Various objects, features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:
FIG. 1 is a schematic illustration of a coupler body casting process flow according to an exemplary embodiment;
FIG. 2 is a schematic illustration of a first perspective view of a coupler casting process, according to an exemplary embodiment;
FIG. 3 is a schematic illustration of a coupler casting process shown from a second perspective in accordance with an exemplary embodiment;
FIG. 4 is a schematic illustration of a third perspective of a coupler casting process in accordance with an exemplary embodiment;
FIG. 5 is a schematic illustration of a fourth perspective view of a coupler casting process, according to an exemplary embodiment.
The reference numerals are explained below:
1. insulating a side riser; 2. insulating a riser; 3. a first chilled material; 4. a feeding channel; 5. a first riser; 6. a second riser; 7. a second chilled material.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are accordingly to be regarded as illustrative in nature and not as restrictive.
In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of the invention.
An embodiment of the present invention provides a coupler body casting process, and referring to fig. 1, the coupler body casting process includes:
s101, processing and manufacturing a metal mold, a hook body tail inner baffle sand core box and a hook body inner cavity integral sand core box, wherein the metal mold comprises an upper mold and a lower mold, the metal mold is provided with a first positioning block, the first positioning block is close to a hook body lower impact socket of the metal mold, the hook body inner cavity integral sand core box is provided with a second positioning block, and the second positioning block is arranged adjacent to a lower traction table of the hook body inner cavity integral sand core box;
s102, manufacturing an upper sand mold and a lower sand mold by using an upper mold and a lower mold respectively, wherein when the lower sand mold is manufactured by using the lower mold, a heat-preservation side riser 1 is arranged on a first positioning block;
s103, manufacturing a hook body tail inner baffle sand core and a hook body inner cavity integral sand core by respectively utilizing a hook body tail inner baffle sand core box and a hook body inner cavity integral sand core box, wherein when the hook body inner cavity integral sand core is manufactured by utilizing the hook body inner cavity integral sand core box, a heat-insulating riser 2 is arranged on a second positioning block;
s104, placing the hook tail inner baffle sand core and the hook inner cavity integral sand core into an upper sand mold and a lower sand mold and performing box assembling;
s105, smelting materials and pouring a sand mold;
and S106, shakeout to obtain the coupler body.
The coupler body casting process of the embodiment of the invention comprises the steps of manufacturing a metal mold, a core box of the inner baffle sand core at the tail part of the coupler body and a core box of the integral sand core of the inner cavity of the coupler body, manufacturing a sand mold, the core box of the inner baffle sand core at the tail part of the coupler body and the core box of the integral sand core of the inner cavity of the coupler body by using the metal mold, the core box of the inner baffle sand core at the tail part of the coupler body and the core box of the integral sand core of the inner cavity of the coupler body, pouring the sand mold by using a smelted material after the box is closed, and finally performing sand falling to obtain the coupler body. In the casting process, the heat-insulating side riser 1 can effectively feed a heat node in the impact nest, so that the shrinkage cavity and shrinkage porosity tendency in the impact nest is eliminated, and the heat-insulating riser 2 feeds a heat node below the lower traction table, so that the tendency of shrinkage cavity and shrinkage porosity defects below the traction table is greatly reduced, and a coupler body with higher quality is obtained.
In addition, a first positioning block is provided near the lower impact socket of the coupler body when the metal mold is manufactured, and the heat-retaining side feeder 1 is provided on the first positioning block when the lower sand mold is manufactured. Correspondingly, when the hook body inner cavity integral sand core box is processed and manufactured, a second positioning block is arranged beside the lower traction table, so that when the hook body inner cavity integral sand core box is manufactured, the heat-insulating riser 2 is arranged on the second positioning block. Specific installation positions of the heat-insulating side riser 1 and the heat-insulating riser 2 can be seen in fig. 2 and 4.
It should be noted that when the upper sand mold and the lower sand mold are combined, other sand cores can be put in addition to the hook body tail inner stop sand core and the hook body inner cavity integral sand core, and the arrangement is not limited herein and can be determined according to the structure of the specific coupler body.
In one embodiment, various feeding side risers can be used for the insulated side riser 1, for example, the insulated side riser 1 can be a common insulated riser or an exothermic insulated riser.
In one embodiment, the insulated riser 2 may be a conventional insulated riser or an exothermic insulated riser.
In one embodiment, the coupler tail part of the metal mold is provided with a third positioning block, and an upper sand mold is manufactured by using the upper mold, wherein the third positioning block comprises: coating a release agent on the surface of the upper die; a first riser 5 is arranged at the highest position of the head of the hook body, and a second riser 6 is arranged on the third positioning block; the upper die, the first riser 5 and the second riser 6 are covered and fixed by using the modified sodium silicate sand, a sand box is placed, and the sand box is filled with the modified sodium silicate sand and then is vibrated, compacted and hardened. For the production of the top sand mold, the molding is carried out using water glass sand, and for the installation position of the second riser 6, reference is made to fig. 2 and 5.
In one embodiment, the first riser 5 may be an insulated blind riser, an open riser, or a exothermic insulated blind riser, etc.
In one embodiment, the second riser 6 may be an insulated blind riser, an open riser, or a exothermic insulated blind riser, etc.
In one embodiment, a lower sand mold is manufactured using a lower mold, comprising: coating a release agent on the surface of the lower die; arranging a heat-insulating side riser 1 on the first positioning block; placing a first chilling material 3 at a T-shaped hot joint on the bottom surface of the tail part of the metal mold; and covering and fixing the lower die, the heat-preservation side riser 1 and the first chilling material 3 by using the modified sodium silicate sand, placing a sand box, filling the modified sodium silicate sand into the sand box, and compacting and hardening. The heat-insulating side riser 1 can effectively feed a heat node in the impact socket, the shrinkage cavity and shrinkage porosity tendency in the impact socket is eliminated, and the first chilling material 3 can realize the effect of quickly absorbing heat and reducing temperature.
In one embodiment, the first quench material 3 may be chromite sand, baozite, chill, or the like. The mounting position for the first chilled material 3 can be seen in fig. 3.
In the process of manufacturing the upper sand mold and the lower sand mold, for example, chills, cores with letters, cast tube bricks, etc. can be placed at specified positions, which are not limited herein and can be selected according to specific process requirements.
In one embodiment, a feeding channel 4 is arranged on the hook body tail inner barrier sand core box, the feeding channel 4 is arranged opposite to a tail pin hole of the hook body tail inner barrier sand core box, and the hook body tail inner barrier sand core with the feeding channel is prepared by utilizing the hook body tail inner barrier sand core box and the modified sodium silicate sand.
In one embodiment, the diameter of the feeding channel 4 is equal to the diameter of the tail pin hole. The feeding channel 4 with the same diameter as the tail pin hole is arranged on the hook body tail inner gear sand core box, the feeding channel with the same diameter can play a good feeding role for the lower tail wing, can be used as a lacing wire in the subsequent heat treatment process, is convenient for processing the tail pin hole in the subsequent processing, reduces the tail shaking phenomenon in the processing, can omit the inner gear processing process, and greatly reduces the processing cost.
In one embodiment, the diameter of the feeding channel 4 may be larger than the diameter of the terminal pin bore. For the arrangement position of the feeding channel 4, see fig. 2 and 5.
In one embodiment, when the hook body tail inner barrier sand core box is used for manufacturing the hook body tail inner barrier sand core, a chilling material is placed on the lower surface of the hook body tail inner barrier sand core box, wherein modified sodium silicate sand is used for manufacturing the hook body tail inner barrier sand core. When the hook body tail inner baffle sand core box is used for manufacturing the hook body tail inner baffle sand core, the feeding channel 4 is not designed, namely, the chilling material is used for replacing the feeding channel 4. Wherein the chilling material can be chromite sand, Baozhu sand or chilling block, etc.
In one embodiment, a hook cavity integral sand core is manufactured using a hook cavity integral sand core box, comprising: a heat-insulating riser 2 is arranged on the second positioning block; and filling a second chilling material 7 into a drop lock hole of the hook body inner cavity integral sand core box, compacting, and starting core shooting by a horizontal parting core shooter to obtain the hook body inner cavity integral sand core.
Specifically, before core shooting of the horizontal parting core shooting machine, the heat-insulating riser 2 is arranged on the second positioning block, and the drop lock hole is filled with the second chilling material 7 and is manually compacted, wherein the second chilling material 7 can effectively reduce a hot spot below the traction table, the heat-insulating riser 2 feeds the hot spot below the lower traction table, and the tendency of shrinkage cavity and shrinkage porosity defects below the traction table is greatly reduced under the combined action of the two.
It should be noted that the second chilling material 7 may be chromite sand, jewel sand, or chilling block, and the second chilling material 7 may be arranged as shown in fig. 3. The insulated riser 2 can be an insulated blind riser.
It should be noted that when the hook body inner cavity integral sand core is manufactured, the small sand core and the core bone can be placed at the specified position according to the installation process requirement, and then shooting is started.
In one embodiment, the horizontal parting core shooter has a sand shooting pressure of 0.45MPa, a CO2 blow pressure of 0.3MPa, a blow hardening time of 100s, and a loose core box is extracted when the blow hardening time is 60 s. The horizontal parting core shooter adopts the modified sodium silicate sand, the horizontal parting core shooter forms the integral sand core of the hook body inner cavity at one step with high speed and high quality, the size precision of the sand core is effectively ensured, and the modified sodium silicate sand is adopted for core making, so that the collapsibility of the sand core is improved, the subsequent sand falling time is greatly shortened, and the production efficiency is improved.
In one embodiment, the chemical composition of the smelted metal material comprises C, Si, Mn, P, S, Cr, Mo, Ni, Al and Fe elements; wherein, the content of C is 0.24 to 0.29 percent, the content of Si is 0.22 to 0.36 percent, the content of Mn is 1.30 to 1.50 percent, the content of P is less than or equal to 0.027 percent, the content of S is less than or equal to 0.027 percent, the content of Cr is 0.40 to 0.60 percent, the content of Mo is 0.20 to 0.30 percent, the content of Ni is 0.35 to 0.55 percent, the content of Al is 0.02 to 0.08 percent, and the balance is Fe. The percentage is the percentage of the specific elements in the total amount, scrap steel is used as the main raw material in the smelting process, an electric arc furnace is used for smelting molten metal, ferroalloy materials are added in the smelting process to adjust the chemical components of the molten metal, steel is tapped when the chemical components of the molten metal in the furnace are qualified and the temperature is raised to 1630 ℃, and pouring is started after the molten steel is calmed in a steel ladle for 5-20 min.
In one embodiment, a 10t bottom pouring type steel ladle is used for pouring in the pouring process, the diameter of a ladle hole is 60mm, the pouring temperature is 1550-1580 ℃, the pouring speed is 20kg/S, pouring is carried out according to the slow, fast and slow principles, point pouring is carried out for 2-3 times after a sand mold is fully poured, sand falling is carried out after heat preservation is carried out for 8 hours after pouring is finished, a blank casting is obtained, and the blank casting is cleaned after preheating treatment to obtain the coupler body. The shakeout is implemented after the casting is poured and heat preservation is finished for 8 hours, so that the tendency of casting deformation after the shakeout and the unpacking is reduced.
In one embodiment, as shown in the coupler casting process schematic diagrams of fig. 2 to 5, the coupler body may be a 102-type coupler body casting, the first chilling material 3 may be chromite sand, the second chilling material 7 may be chromite sand, the first riser 5 may be an insulation blind riser, the second riser 6 may be an insulation blind riser, the insulation riser 2 may be 6/9 insulation riser, the insulation side riser 1 may be 8/11 insulation side riser, and the core box of the inner core rail at the tail of the coupler body is provided with the feeding channel 4. The arrangement of the structures can overcome the defect that the 102-type car hook body is seriously shrunk and loosened in the casting process, and further effectively ensures the quality of a casting of the 102-type car hook body.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and exemplary embodiments be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. A coupler body casting process is characterized by comprising the following steps:
the manufacturing method comprises the following steps of processing and manufacturing a metal mold, a hook body tail inner gear sand core box and a hook body inner cavity integral sand core box, wherein the metal mold comprises an upper mold and a lower mold, a first positioning block is arranged on the metal mold, the first positioning block is close to a hook body lower impact pit of the metal mold, a second positioning block is arranged on the hook body inner cavity integral sand core box, and the second positioning block is arranged adjacent to a lower traction table of the hook body inner cavity integral sand core box;
respectively manufacturing an upper sand mold and a lower sand mold by using the upper mold and the lower mold, wherein when the lower sand mold is manufactured by using the lower mold, a heat-insulating side riser (1) is arranged on the first positioning block;
manufacturing a hook body tail inner baffle sand core and a hook body inner cavity integral sand core by respectively utilizing the hook body tail inner baffle sand core box and the hook body inner cavity integral sand core box, wherein when the hook body inner cavity integral sand core is manufactured by utilizing the hook body inner cavity integral sand core box, a heat-insulating riser (2) is arranged on the second positioning block;
placing the hook tail inner baffle sand core and the hook inner cavity integral sand core into the upper sand mold and the lower sand mold and performing box assembling;
smelting materials and pouring a sand mold;
shakeout to obtain a coupler body of the car coupler;
the feeding channel (4) is arranged on the hook body tail inner baffle sand core box, the feeding channel (4) is arranged opposite to a tail pin hole of the hook body tail inner baffle sand core box, the hook body tail inner baffle sand core with the feeding channel is prepared by utilizing the hook body tail inner baffle sand core box and modified sodium silicate sand, and the diameter of the feeding channel (4) is equal to that of the tail pin hole.
2. The coupler body casting process of claim 1, wherein a third positioning block is arranged at the tail part of the coupler of the metal mold, and the upper sand mold is manufactured by using the upper mold, and the process comprises the following steps:
coating a release agent on the surface of the upper die;
a first riser (5) is arranged at the highest position of the head of the hook body, and a second riser (6) is arranged on the third positioning block;
and covering and fixing the upper die, the first riser (5) and the second riser (6) by using modified sodium silicate sand, placing a sand box, filling the modified sodium silicate sand into the sand box, and compacting and hardening.
3. The coupler body casting process of claim 1 or 2, wherein the lower sand mold is manufactured using the lower mold, comprising:
coating a release agent on the surface of the lower die;
arranging the heat-insulating side riser (1) on the first positioning block;
placing a first chilling material (3) at a T-shaped hot joint on the bottom surface of the tail part of the metal mold;
and covering and fixing the lower die, the heat-preservation side riser (1) and the first chilling material (3) by using modified sodium silicate sand, placing a sand box, filling the modified sodium silicate sand into the sand box, and compacting and hardening.
4. The coupler body casting process of claim 1, wherein when the coupler body tail inner barrier sand core box is used for manufacturing the coupler body tail inner barrier sand core, a chilling material is placed on the lower surface of the coupler body tail inner barrier sand core box, and modified sodium silicate sand is used for manufacturing the coupler body tail inner barrier sand core.
5. The coupler body casting process of claim 1, wherein the making of the coupler body cavity monolithic sand core with the coupler body cavity monolithic sand core box comprises:
the second positioning block is provided with the heat-insulating riser (2);
and filling a second chilling material (7) into the drop lock hole of the hook body inner cavity integral sand core box, compacting, and starting core shooting by a horizontal parting core shooting machine to obtain the hook body inner cavity integral sand core.
6. The coupler body casting process of claim 5, wherein the horizontal parting core shooter has a sand shooting pressure of 0.45MPa and CO2The blowing pressure is 0.3MPa, the blowing hardening time is 100s, and the loose block of the core box is extracted when the blowing hardening lasts for 60 s.
7. The coupler body casting process according to claim 1, wherein the chemical components of the smelted metal material comprise C, Si, Mn, P, S, Cr, Mo, Ni, Al and Fe elements;
wherein, the content of C is 0.24 to 0.29 percent, the content of Si is 0.22 to 0.36 percent, the content of Mn is 1.30 to 1.50 percent, the content of P is less than or equal to 0.027 percent, the content of S is less than or equal to 0.027 percent, the content of Cr is 0.40 to 0.60 percent, the content of Mo is 0.20 to 0.30 percent, the content of Ni is 0.35 to 0.55 percent, the content of Al is 0.02 to 0.08 percent, and the balance is Fe.
8. The coupler body casting process according to claim 1, wherein a 10t bottom pouring type steel ladle is used for pouring in the pouring process, the diameter of a hole is 60mm, the pouring temperature is 1550-1580 ℃, the pouring speed is 20kg/S, pouring is carried out according to the principle of slow, fast and slow, after a sand mold is fully poured, point pouring is carried out for 2-3 times, sand falling is carried out after heat preservation is completed for 8 hours to obtain a blank casting, and the blank casting is subjected to preheating treatment and then is cleaned to obtain the coupler body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010927220.4A CN111872325B (en) | 2020-09-07 | 2020-09-07 | Coupler body casting process |
| PCT/CN2021/108309 WO2022048343A1 (en) | 2020-09-07 | 2021-07-26 | Railcar coupler body casting process |
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| CN202010927220.4A CN111872325B (en) | 2020-09-07 | 2020-09-07 | Coupler body casting process |
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| CN111872325B (en) * | 2020-09-07 | 2021-10-29 | 中车大同电力机车有限公司 | Coupler body casting process |
| CN112548040B (en) * | 2020-11-20 | 2022-07-26 | 中国航发沈阳黎明航空发动机有限责任公司 | High-temperature alloy complex thin-wall part pouring system |
| CN112605346B (en) * | 2020-11-30 | 2022-10-04 | 宝鸡石油机械有限责任公司 | Casting method of hook body for hook of ultra-deep well petroleum drilling rig hoisting system |
| CN112872292B (en) * | 2020-12-30 | 2022-11-25 | 宁波金汇精密铸造有限公司 | Coupler knuckle and manufacturing method thereof, loam core die and coupler knuckle die |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4124057A (en) * | 1977-07-13 | 1978-11-07 | Mcconway & Torley Corporation | Coupler pattern for a railway vehicle |
| US7302994B2 (en) * | 2005-12-06 | 2007-12-04 | Mcconway & Torley, Llc | Method and system for manufacturing a coupler knuckle |
| CN101748338B (en) * | 2009-12-31 | 2011-10-05 | 南车长江车辆有限公司 | High-strength cast steel for coupler of railway vehicle and manufacturing method thereof |
| US20130160962A1 (en) * | 2011-12-27 | 2013-06-27 | Bedloe Industries Llc | Main body core set assembly and core box for a coupler body |
| US8770265B2 (en) * | 2011-12-28 | 2014-07-08 | Bedloe Industries Llc | Method and system for manufacturing railcar couplers |
| CN103667955B (en) * | 2013-12-20 | 2016-02-17 | 齐齐哈尔轨道交通装备有限责任公司 | A kind of steel with high impact strength and foundry goods thereof |
| CN105215271B (en) * | 2015-10-29 | 2017-09-22 | 共享铸钢有限公司 | The cored-up mould sand mould structure and cored-up mould method of a kind of gear box casing casting |
| CN206811093U (en) * | 2017-05-09 | 2017-12-29 | 重庆通耀铸锻有限公司 | Coupler body casting mould and railway freight-car coupler mould |
| CN209830199U (en) * | 2019-05-08 | 2019-12-24 | 株洲九方铸造股份有限公司 | Heavy-duty locomotive coupler body casting mould |
| CN110453134A (en) * | 2019-08-28 | 2019-11-15 | 山东钢铁股份有限公司 | A kind of high-strength tenacity locomotive couple yoke steel and preparation method thereof |
| CN111872325B (en) * | 2020-09-07 | 2021-10-29 | 中车大同电力机车有限公司 | Coupler body casting process |
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