CN112091175A - Riser structure, casting mould and crankshaft production device - Google Patents
Riser structure, casting mould and crankshaft production device Download PDFInfo
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- CN112091175A CN112091175A CN202010955104.3A CN202010955104A CN112091175A CN 112091175 A CN112091175 A CN 112091175A CN 202010955104 A CN202010955104 A CN 202010955104A CN 112091175 A CN112091175 A CN 112091175A
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- riser
- casting
- mold core
- mold
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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
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention provides a riser structure, a casting mold and a crankshaft production device, relates to the technical field of crankshaft casting, and solves the technical problem that a riser structure matched with a mold core easily causes more gate materials at the position of a casting in the mold core corresponding to the riser. The riser structure comprises a riser communicated with a pouring system, a pressure edge part is formed on the riser, the pressure edge part is used for being lapped with the mold core so as to enable the riser to be communicated with the mold cavity in the mold core, and a matching structure formed when the pressure edge part is lapped with the mold core is used for enabling internal stress to be concentrated at the joint of a casting and a nozzle material when the casting and the nozzle material are separated; this rising head structure passes through the crimping portion that sets up on the rising head and mould benevolence overlap joint cooperation, and the cooperation structure of formation between them can make stress concentration in both junctions when separation foundry goods and mouth of a river material, and the mouth of a river material of being convenient for drops from the foundry goods, reduces the mouth of a river material that the foundry goods corresponds dead head department position, and the foundry goods of production need not to polish, has improved the production efficiency of foundry goods.
Description
Technical Field
The invention relates to the technical field of crankshaft casting, in particular to a riser structure, a casting mold and a crankshaft production device.
Background
The crankshaft is used as a core component of an air conditioner compressor, a nodular cast iron material is usually adopted, and a casting process usually adopts a high-pressure green sand vertical molding pouring mode. As the ductile cast iron material has larger thermal expansion and cold shrinkage compared with the gray cast iron material, a certain shrinkage exists after the temperature is reduced, and the mechanical property of the casting is reduced due to shrinkage cavity and shrinkage porosity. In order to realize feeding of the thick and large part of the eccentric shaft in the casting process and prevent the occurrence of hole sites in a cavity and the like from influencing the casting quality, a structural process for feeding a dead head in a nodular cast iron process is usually arranged in the prior art, namely, the dead head connected with a pouring gate is arranged and is communicated with the cavity in the mold core, when the material in the cavity shrinks, the melt in the dead head can timely enter the cavity to be fed, and a shrinkage cavity can be transferred to the finally solidified casting head.
Thus, the feeder head is a cavity within the mold for storing molten metal that is replenished as the casting is formed. The riser is an unnecessary part, and a complete and compact casting is obtained after cutting.
The applicant has found that the prior art has at least the following technical problems:
in the casting with the conventional structure which uses nodular cast iron as a material, the produced casting cannot be well separated from a nozzle material in a riser, the nozzle material is always present at the position of the casting corresponding to the riser, subsequent grinding process treatment is required, and the production efficiency is reduced.
Disclosure of Invention
The invention aims to provide a riser structure, a casting mold and a crankshaft production device, which aim to solve the technical problem that a riser matched with a mold core in the prior art is easy to cause more gate materials at the position of the corresponding riser of a casting in the mold core; the technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a riser structure, which comprises a riser communicated with a pouring system, wherein:
be constructed on the rising head and press limit portion, press limit portion be used for with mould benevolence overlap joint so that the rising head with mould benevolence inner cavity intercommunication, just press limit portion with the cooperation structure that forms when mould benevolence overlap joint makes the internal stress concentrate on both junctions when being used for separating foundry goods and mouth of a river material.
Preferably, the cross-sectional area of the riser in the vertical direction is reduced along the direction close to the mold core to form a blank pressing part, and the blank pressing part is located at the periphery of the riser.
Preferably, the edge pressing part is provided with a hole or a notch matched with the die core.
Preferably, said holes or said notches are located on the surface of said feeder and are located immediately adjacent to the outer edge of said feeder.
Preferably, the extending width of the edge pressing part on the riser is 1-3 mm.
The embodiment provides a casting mould, including mould benevolence and above-mentioned rising head structure, there is connecting portion on the mould benevolence, connecting portion with blank holder overlap joint and intercommunication the rising head with the die cavity.
Preferably, the mold core is provided with a long shaft section extending in the vertical direction, and a right-angle structure capable of directly drawing the mold is formed between the long shaft section and the shaping plate.
Preferably, the casting mould further comprises a pouring cup and a cross gate, wherein an inclined surface is arranged at the tail end of the cross gate, and the cross section area of the position of the inclined surface is reduced towards the side far away from the pouring cup so as to reduce the flow rate of the melt and prevent residues from entering the cavity.
Preferably, the casting mold further comprises a horizontal runner and a vertical runner which are communicated, wherein: the vertical pouring channel is overlapped on the surface of the horizontal pouring channel so as to block residues in the melt in the horizontal pouring channel from entering the vertical pouring channel.
Preferably, a slag collecting bag used for containing impurities and a low-temperature initial flow melt is arranged at the end of the vertical pouring channel far away from the horizontal pouring channel.
The embodiment provides a bent axle apparatus for producing, includes above-mentioned casting mould.
Compared with the prior art, the dead head structure, the casting mold and the crankshaft production device provided by the invention have the following beneficial effects: through the overlap joint cooperation of the edge pressing part and the die core arranged on the riser, the matching structure formed by the edge pressing part and the die core can lead the stress to be concentrated on the joint of the casting and the nozzle material when the casting and the nozzle material are separated, so that the nozzle material is convenient to fall off from the casting, the nozzle material of the casting corresponding to the position of the riser is reduced, the produced casting is not required to be polished, and the production efficiency of the casting is improved. The same casting mould with the riser structure has the advantages that the casting does not need to be polished and the production efficiency is improved through the structure that the connecting part on the mould core is in lap joint with the edge pressing part. When the casting mold is applied to crankshaft production, the crankshaft produced by the ball-milling cast iron also has the advantages of no need of polishing and high production efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the whole structure of the two-type plate fastening of the casting mold;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2, showing the mating structure of the mold core and the riser;
FIG. 4 is a front view of the casting mold;
fig. 5 is a side view of the casting mold.
In the figure 1, a pouring cup; 2. a cross gate; 21. an inclined surface; 3. a vertical pouring channel; 4. an inner pouring channel; 5. a riser; 51. pressing edge parts; 6. a mold core; 61. a connecting portion; 7. collecting a slag ladle; 8. and (5) reinforcing ribs.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the equipment or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
Example 1
Referring to fig. 1, 2 and 3, the present embodiment provides a riser structure, which includes a riser 5 connected to a gating system, wherein:
the riser 5 is provided with a pressing edge part 51, the pressing edge part 51 is used for being lapped with the die core 6 so as to enable the riser 5 to be communicated with the cavity in the die core 6, and a matching structure formed when the pressing edge part 51 is lapped with the die core 6 is used for separating a casting from a nozzle material so as to enable internal stress to be concentrated at the joint of the casting and the nozzle material.
The riser 5 is communicated with a cavity formed in the mold core 6, and is used for feeding melt into the cavity in time (mainly aiming at materials with high thermal expansion and cold contraction rates, such as nodular cast iron).
The rising head structure of this embodiment, through the crimping portion 51 and the 6 overlap joint cooperations of mould benevolence that set up on the rising head 5, the cooperation structure of formation between them can make stress concentration in both junctions when separation foundry goods and mouth of a river material, and the mouth of a river material of being convenient for drops from the foundry goods, reduces the mouth of a river material that the foundry goods corresponds dead head 5 department position, and the foundry goods of production need not to polish, has improved the production efficiency of foundry goods.
Specifically, the cross-sectional area of the riser 5 in the vertical direction decreases along the direction close to the die core 6 to form a blank holder 51, and the blank holder 51 is located at the outer periphery of the riser 5.
As shown in fig. 2, the shape of the edge pressing portion 51 is matched with the outer contour of the mold core so as to form a matching structure for overlapping and pressing the mold core in the vertical direction.
The structure is convenient for the internal stress to be concentrated at the joint of the riser 5 and the mold core 6 when the blank pressing part 51 and the mold core 6 are lapped to form a matching structure for separating the casting and the nozzle material, the casting and the nozzle material are convenient to separate, the produced casting does not need to be polished, and the production efficiency of the casting is improved.
In order to increase the strength of the riser, the riser 5 has reinforcing ribs 8 at the locations where the melt is admitted, see fig. 2.
As an alternative embodiment, the edge pressing part 51 has a hole or a notch for matching with the mold core 6.
The edge pressing part 51 is communicated with the cavity in the die core 6 through the structure, the melt (molten metal) can enter the cavity to be timely fed, and the structure is simple and convenient to implement.
As an alternative embodiment, see fig. 2 and 3, the holes or notches are located on the surface of the riser 5 and are located close to the outer edge of the riser 5.
The arrangement of the structure is convenient for leading the cross section of the nozzle material of the lap joint structure of the edge pressing part 51 and the die core 6 to be smaller and thinner, the actual production can not influence the positioning of the produced product, most cast products can directly and automatically fall off in the roller shakeout and shaking bed shakeout stages, the workload of workers for separating the cast and the nozzle material is greatly reduced, the separated cast basically has no nozzle material, the cast does not need to be polished,
as shown in fig. 3, the crimping portion 51 is located on an upper or lower surface disposed against the outer edge of the riser 5.
As an alternative embodiment, referring to fig. 2 and 3, the extending width of the crimping portion 51 on the riser 5 is 1-3mm in this embodiment.
Preferably, the extending width of the edge pressing part 51 on the riser 5 is 2 mm. As shown in fig. 2, the edge pressing portion 51 is overlapped on an upper surface (or a lower surface, different in view angle) of the edge side of the mold core 6, as shown in fig. 3, the matching structure of the edge pressing portion 51 and the mold core 6 makes the extending width of the overlapping position of the two narrow, and the structure of the edge pressing portion 51 makes the overlapping thickness of the two thin, so as to facilitate the separation of the casting from the nozzle material in the riser 5.
Example 2
Referring to fig. 1 to 5, the embodiment provides a casting mold, which, as shown in fig. 1, includes a mold core 6 and the above-mentioned riser structure, the mold core 6 has a connecting portion 61, and the connecting portion 61 overlaps with the edge pressing portion 51 and communicates with the riser 5 and the mold cavity.
Set up on mould benevolence 6 with blank pressing portion 51 complex connecting portion 61, the casting mould of this embodiment has above-mentioned rising head structure, through mould benevolence 6 on connecting portion 61 and blank pressing portion 51 overlap joint complex structure, has the advantage that the production foundry goods need not to polish, improve production efficiency.
Referring to fig. 2 and 3, as an alternative embodiment, the connecting portion 61 is disposed adjacent to the outer edge of the die core 6, and the connecting portion 61 is a hole or a notch that is matched with the edge pressing portion 51.
The position of the connecting part 61 on the die core 6 can be matched with the edge pressing part 51, and is specifically matched with a hole position or a notch on the edge pressing part 51, so that the lap joint communication between the two parts is convenient to realize.
As an alternative embodiment, referring to fig. 5, the mold insert 6 has a long shaft section extending in a vertical direction, and a right-angle structure capable of direct drawing is formed between the long shaft section and the mold plate.
The template usually comprises two PP and SP plate bodies and is used for arranging structures such as a pouring cup 1, a pouring gate, a riser 5, a mold core 6 and the like, when the two template bodies are buckled, the corresponding structures are completely buckled, and a space for melt to enter can be formed. When the foundry goods had the major axis section of extending in a vertical direction, longer separation route had between foundry goods and the template this moment, and two templates can be followed the extending direction back of the body motion of major axis section, realize the separation of foundry goods and template, and at this moment, can need not to set up the draft angle (be draft R angle usually, be the arc angle that makes things convenient for foundry goods and template separation to set up promptly) between the major axis section on mould benevolence 6 and the template, can directly connect through the right angle structure, can realize smooth draft.
The right angle structure between the long shaft section and the template can realize smooth drawing, and simultaneously, the material of the melt (molten metal) can be reduced due to no need of setting an arc angle for drawing, so that raw materials are saved, and the cost is reduced.
As an alternative embodiment, referring to fig. 1, the casting mould further comprises a pouring cup 1 and a runner 2 on the pattern plate, the end of the runner 2 is provided with an inclined surface 21, and the cross-sectional area of the position of the inclined surface 21 is reduced towards the side far away from the pouring cup 1 so as to reduce the flow rate of the melt and prevent residues from entering the mould cavity.
The pouring gate on the pouring gate cup 1 is an inlet allowing a melt (molten metal) to enter a pouring system, the pouring gate cup 1 can avoid splashing and overflowing of the molten metal and swirling of the molten metal at the pouring gate during pouring, and the flowing and mold filling of the molten metal are ensured to be stable.
As shown in fig. 1, an included angle between the inclined surface 21 and the horizontal direction in the present embodiment is 13.5 °, which can be adjusted according to actual situations, and is not limited in detail here.
The inclined surface 21 at the tail end of the runner 2 can reduce the flow speed of molten metal, so that residues or other impurities in the molten metal can be partially adhered to the inclined surface, and the molten metal is prevented from entering the downstream of a pouring system and entering a cavity along with the molten iron to influence the product quality.
As an alternative embodiment, as shown in fig. 1 and 5, the casting mould further comprises a runner 2 and a sprue 3 in communication, wherein: the sprues 3 overlap the surface of the runners 2 to block debris in the melt in the runners 2 from entering the sprues 3.
As shown in fig. 2, the vertical runner 3 has an overlapping portion with a small cross-sectional area and a small thickness at a position overlapping with the horizontal runner 2, and the thickness of the overlapping portion may be 4mm in this embodiment. The arrangement of the structure can further prevent impurities such as residue in the molten metal from entering the vertical runner 3.
The pouring system in the embodiment comprises the pouring cup 1, the cross pouring channel 2 and the vertical pouring channel 3 which are communicated in sequence, wherein the cross pouring channel 2 is used for introducing the melt of the pouring cup 1 into two or more vertical pouring channels 3 which are arranged at intervals. Further, as shown in fig. 1, the vertical pouring gate 3 is communicated with an inner pouring gate 4, and the inner pouring gate 4 is used for communicating the vertical pouring gate 3 with each riser 5 so as to enable the melt in the vertical pouring gate 3 to enter each riser 5.
As an alternative embodiment, the end of the vertical runner 3 remote from the horizontal runner 2 is provided with a slag trap 7 for containing impurities and the lower temperature primary flow melt.
The slag trap 7 may be a closed trough. Because the melt which is just filled into the pouring system possibly contains impurities such as residues or the temperature of the melt cannot reach the target temperature, the melt which firstly enters the pouring system and has lower temperature and partial residues can be collected by arranging the slag collecting bag 7, and the quality of the casting in the cavity is ensured.
In the casting mold in this embodiment, all the mold inserts 6 are independently made into insert structures and assembled into the mold plates, and except for the right-angle structure which can be used for directly drawing the mold and is formed between the long shaft section and the mold plates, the other drawing angles are arc angles, and the angles are designed to be 1.5 °. By the structure, the small product machining allowance of the drawing angle is small, meanwhile, the root fillet radius R is 0.5mm, the positioning position in machining can be guaranteed not to interfere, and the positioning end face cannot be effectively close to the positioning tool due to too large chamfering.
The four corners of the template may also be provided with anti-collision pins (not shown), which may be cylinders with beveled corners at the root. The effect of anticollision round pin is, prevents that mould benevolence 6 from colliding in the transportation to play the guide effect when the molding, ensure that the drawing of patterns is smooth and easy.
Example 3
The embodiment provides a bent axle apparatus for producing, includes above-mentioned casting mould. Is particularly suitable for crankshafts made of nodular cast iron.
When the casting mold is applied to crankshaft production, the crankshaft produced by nodular cast iron also has the advantages of no need of polishing and high production efficiency.
The particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (11)
1. A riser structure comprising risers communicating with a gating system, wherein:
be constructed on the rising head and press limit portion, press limit portion be used for with mould benevolence overlap joint so that the rising head with mould benevolence inner cavity intercommunication, just press limit portion with the cooperation structure that forms when mould benevolence overlap joint makes the internal stress concentrate on both junctions when being used for separating foundry goods and mouth of a river material.
2. The riser structure of claim 1, wherein a vertical cross-sectional area of the riser decreases in a direction approaching the mold core to form a bead portion, and the bead portion is located at an outer periphery of the riser.
3. The riser structure of claim 1 wherein the bead portion has holes or notches for engaging the core.
4. The riser structure of claim 3, wherein the apertures or notches are located on a surface of the riser and are located proximate an outer edge of the riser.
5. The riser structure of any one of claims 1-4, wherein the bead extends 1-3mm wide across the riser.
6. A casting mold, characterized by comprising a mold core and the feeder structure of any one of claims 1 to 5, wherein the mold core is provided with a connecting part, and the connecting part is overlapped with the edge pressing part and is communicated with the feeder and the mold cavity.
7. The casting mold according to claim 6, wherein the mold core has a long shaft section extending in a vertical direction, and a right-angle structure capable of direct drawing is formed between the long shaft section and the shaping plate.
8. The casting mold according to claim 6, further comprising a sprue cup and a runner having a sloped surface at a distal end thereof, the sloped surface being positioned to decrease in cross-sectional area toward a side away from the sprue cup to reduce melt flow rate and prevent debris from entering the cavity.
9. The casting mold of claim 6, further comprising communicating runners and sprues, wherein: the vertical pouring channel is overlapped on the surface of the horizontal pouring channel so as to block residues in the melt in the horizontal pouring channel from entering the vertical pouring channel.
10. The casting mold according to claim 9, wherein a slag trap for containing impurities and a lower temperature primary flow melt is present at the end of the vertical runner remote from the horizontal runner.
11. A crankshaft production apparatus comprising the casting mold according to any one of claims 6 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010955104.3A CN112091175A (en) | 2020-09-11 | 2020-09-11 | Riser structure, casting mould and crankshaft production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010955104.3A CN112091175A (en) | 2020-09-11 | 2020-09-11 | Riser structure, casting mould and crankshaft production device |
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| Publication Number | Publication Date |
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| CN112091175A true CN112091175A (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010955104.3A Pending CN112091175A (en) | 2020-09-11 | 2020-09-11 | Riser structure, casting mould and crankshaft production device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680958A (en) * | 2021-08-30 | 2021-11-23 | 安徽海立精密铸造有限公司 | Vertical parting arrangement pouring system and pouring process for crankshaft |
-
2020
- 2020-09-11 CN CN202010955104.3A patent/CN112091175A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680958A (en) * | 2021-08-30 | 2021-11-23 | 安徽海立精密铸造有限公司 | Vertical parting arrangement pouring system and pouring process for crankshaft |
| CN113680958B (en) * | 2021-08-30 | 2023-10-24 | 安徽海立精密铸造有限公司 | Vertical parting arrangement casting system and casting process for crankshaft |
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