CN114535509A - Slant rising head feeding system - Google Patents
Slant rising head feeding system Download PDFInfo
- Publication number
- CN114535509A CN114535509A CN202210184057.6A CN202210184057A CN114535509A CN 114535509 A CN114535509 A CN 114535509A CN 202210184057 A CN202210184057 A CN 202210184057A CN 114535509 A CN114535509 A CN 114535509A
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- riser
- seat
- neck
- sleeve
- feeding system
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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
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses an oblique riser feeding system which comprises a riser neck, a riser seat and a riser sleeve, wherein the riser neck is connected with a hot junction body of a casting, and the riser seat is connected between the riser neck and the riser sleeve; the riser sleeve and the axis of the riser seat are arranged in the same direction and are inclined relative to the vertical direction. According to the oblique riser feeding system provided by the invention, the riser sleeve is obliquely arranged, and the axis of the riser sleeve is inclined relative to the vertical direction, so that the distance between a riser body formed in the riser sleeve and a casting is increased, the heat affected zone between the riser body and the product is greatly weakened, and the defects of casting such as recess, air pocket, shrinkage porosity and the like can be effectively prevented.
Description
Technical Field
The invention relates to the field of metal casting, in particular to an oblique riser feeding system.
Background
In the steel casting process of sand casting, the feeding of the thick and large part of the side surface of a casting is usually realized by adopting a side riser, a common side riser system consists of a riser sleeve, a riser seat and a riser neck, a riser body is formed in the riser sleeve, the riser seat and the riser neck are connected into a whole, and the axis of the riser neck is vertically intersected with the axis of the riser seat.
In the prior art, a riser seat and a riser neck of a side riser are formed by a die body, the shape and the size of the riser seat and the riser neck meet the requirement of the modulus matching relation of each unit of a riser feeding system, and because a forming surface layer is made of non-heat-insulating material, the volume of the riser seat and the riser neck is larger, and a contact heat joint at the joint of the riser neck and a casting is increased; the riser body is arranged on the riser seat and is relatively close to the casting, a negative heat affected zone X is easily formed between the riser body and the casting due to the structure, the casting can have the defects of shrinkage cavity, shrinkage porosity and the like in serious conditions, and particularly, the riser is arranged on the inner side part of a small cambered surface with large curvature and is easy to have the defects.
In addition, in the conventional design method of the side riser, as shown in fig. 1, for the convenience of mold extraction, the axial directions of the riser body and the riser seat are generally vertical, and the axial line of the riser neck is vertical to the riser body and the riser seat, but the method has the following disadvantages:
(1) the riser neck and the riser seat are usually molded by molding sand, and the sizes of the riser seat and the riser neck are too large, so that the metal utilization rate is too low;
(2) the riser body and the riser seat are usually close to the side surface of the upper part of the casting, so that the heat dissipation of the casting at the part can be influenced, and the defects of sinking, air pockets, shrinkage porosity and the like can be generated on the surface of the casting at serious time;
(3) the riser seat and the riser body are required to be manufactured by die separation, such as a die separation surface in fig. 1, otherwise, the riser cannot be formed smoothly, and therefore, a plurality of core boxes are required to be manufactured.
Therefore, how to improve the feeding effect of the feeder feeding system is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an oblique riser feeding system which can effectively improve the feeding effect of the oblique riser feeding system and improve the quality of castings.
In order to achieve the purpose, the invention provides the following technical scheme:
an oblique riser feeding system comprises a riser neck, a riser seat and a riser sleeve, wherein the riser neck is connected with a hot joint body of a casting, and the riser seat is connected between the riser neck and the riser sleeve; the riser sleeve and the axis of the riser seat are arranged in the same direction and are inclined relative to the vertical direction.
Preferably, an included angle is formed between the axial direction of the riser bush and the axial direction of the riser neck, and the included angle is 60-80 degrees.
Preferably, the side wall of the bottom of the riser seat is spherical, the upper end of the riser seat is provided with a bayonet which is connected with the riser sleeve, and the other end of the riser seat is connected with the riser neck; the riser seat is connected with the riser neck to form a whole.
Preferably, the circular arc radius of the riser seat is R, the radius R1 of the riser neck is 0.4-0.67R, and the minimum length A of the riser neck is 0.57-0.67R.
Preferably, the top of the riser seat is provided with a cylindrical connecting part, the riser sleeve is communicated with the connecting part, and the length B of the connecting part is 0.15-0.25R.
Preferably, the end part of the riser bush far away from the riser seat is provided with an exhaust hole, the inner side of the middle position of the end part of the riser bush is provided with a tip part, and the exhaust hole is opened at a position close to the tip part.
Preferably, the riser neck, the riser seat and the riser sleeve are all made of heat-insulating materials.
Preferably, the riser neck, the riser seat and the riser sleeve are all made of floating bead perlite thermal insulation materials or fiber thermal insulation materials serving as aggregates.
Preferably, the riser neck, the riser seat and the riser sleeve are of an integral structure and are prefabricated members.
Preferably, the thermal joint body is positioned on the casting close to the riser neck, and the modulus of the thermal joint body is set to be MBodyThe modulus M of the riser bushSleeve≥1.2×MBodyModulus M of the riser neckNeck＝(0.8～1)×MBodyModulus M of the riser baseSeat≥1.2×MBody。
The invention provides an oblique riser feeding system which comprises a riser neck, a riser seat and a riser sleeve, wherein the riser neck is connected with a hot joint body of a casting, and the riser seat is connected between the riser neck and the riser sleeve; the riser sleeve and the axis of the riser seat are arranged in the same direction and are inclined relative to the vertical direction. According to the oblique riser feeding system provided by the invention, the riser sleeve is obliquely arranged, and the axis of the riser sleeve is inclined relative to the vertical direction, so that the distance between a riser body formed in the riser sleeve and a casting is increased, the heat affected zone between the riser body and the product is greatly weakened, and the defects of casting such as recess, air pocket, shrinkage porosity and the like can be effectively prevented.
In a preferred embodiment, the riser neck, the riser seat and the riser sleeve are of one-piece construction and are a preform. By the structure, the riser sleeve and the riser seat are of an integrated structure, the problem that a parting surface needs to be manufactured separately between the riser body and the riser seat in the prior art is solved, manufacturing processes and dies are reduced, cost is saved, and efficiency is improved.
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 diagram of a prior art lateral riser feeding system;
FIG. 2 is a schematic structural diagram of an embodiment of the slant riser feeding system of the present invention;
FIG. 3 is a schematic diagram showing the dimensions of a riser bush, a riser seat and a riser neck in the slant riser feeding system provided by the present invention;
FIG. 4 is a schematic diagram illustrating the dimensions of a thermal junction in the slant riser feeding system according to the present invention;
FIG. 5 is a side view of the diagonal riser feeding system provided by the present invention;
FIG. 6 is a cross-sectional view of a casting test block after feeding by the slant riser feeding system provided by the present invention;
wherein: an X-heat affected zone; y-a parting surface; 1-a thermal segment body; 2-riser sleeve; 3-a riser seat; 4-riser neck; 5-casting.
Detailed Description
The core of the invention is to provide the oblique riser feeding system which can effectively improve the feeding effect of the oblique riser feeding system and improve the casting quality.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2 to 6, fig. 2 is a schematic structural diagram illustrating an embodiment of the slant feeder feeding system according to the present invention; FIG. 3 is a schematic diagram showing the dimensions of a riser bush, a riser seat and a riser neck in the slant riser feeding system provided by the present invention; FIG. 4 is a schematic diagram illustrating the dimensions of a thermal junction in the slant riser feeding system according to the present invention; FIG. 5 is a side view of the diagonal riser feeding system provided by the present invention; FIG. 6 is a cross-sectional view of a casting test block after feeding by the slant feeder feeding system provided by the invention.
In this embodiment, the diagonal riser feeding system comprises a riser neck 4, a riser seat 3 and a riser sleeve 2.
Wherein, the riser neck 4 is connected with the thermal joint body 1 of the casting 5, and the riser seat 3 is connected between the riser neck 4 and the riser sleeve 2; the riser bush 2 is arranged in the same direction as the axis of the riser seat 3 and is inclined relative to the vertical direction, and specifically, an included angle theta is formed between the axis direction of the riser bush 2 and the vertical direction.
According to the oblique riser feeding system provided by the invention, the riser sleeve 2 is obliquely arranged, and the axis of the riser sleeve 2 is inclined relative to the vertical direction, so that the distance from a riser body formed in the riser sleeve 2 to the casting 5 is increased, the heat affected zone X between the riser body and a product is greatly weakened, and the defects of sinking, air pockets, shrinkage porosity and the like of the casting 5 can be effectively prevented.
Here, the axis of the riser bush 2 is inclined with respect to the vertical direction, and means a state in which the slant feeder feeding system is in a normal casting state. When the inclined riser feeding system is not in a casting processing state, the axis of the riser sleeve 2 and the vertical direction can be correspondingly changed.
Specifically, an included angle is formed between the axial direction of the riser bush 2 and the axial direction of the riser neck 4, and the included angle is 60-80 degrees, namely the included angle theta between the axial direction of the riser bush 2 and the numerical direction is 10-30 degrees. By the arrangement, the distance between the riser bush 2 and the casting 5 can be effectively increased, the influence on the heat affected zone X is reduced, and the riser bush 2 can be prevented from occupying too much space, so that the included angle between the axial direction of the riser bush 2 and the numerical direction is set to be 10-30 degrees, which is the preferred scheme.
On the basis of the above embodiments, the bottom side wall of the riser seat 3 is spherical, the upper end of the riser seat 3 is provided with a bayonet to be connected with the riser sleeve 2, and the other end of the riser seat 3 is connected with the riser neck 4; a riser pit is formed on the spherical side wall at the bottom of the riser seat 3, and the riser neck 4 and the riser sleeve 2 are both cylindrical; the riser seat 3 is connected with the riser neck 4 to form a whole.
In addition to the above embodiments, the radius of the circular arc of the riser seat 3 is R, the radius R1 of the riser neck 4 is 0.4 to 0.67R, and the minimum length a of the riser neck 4 is 0.57 to 0.67R.
In addition to the above embodiments, the riser base 3 has a cylindrical connecting portion at its top, the riser sleeve 2 communicates with the connecting portion, and the length B of the connecting portion is 0.15 to 0.25R, which can be used for connecting purposes without being too long.
On the basis of the above embodiments, the end of the riser bush 2 far away from the riser seat 3 is provided with an exhaust hole, which is beneficial to smooth exhaust and filling during casting, and the inner side of the middle position of the end of the riser bush 2 is provided with a tip part, specifically, the tip part can promote the middle part of the liquid in the riser bush 2 to collapse, so that the residual liquid can be communicated with the atmosphere, and the feeding of the liquid which is not solidified in the riser bush 2 to the thermal joint body 1 can be enhanced under the action of the atmospheric pressure.
In addition to the above embodiments, the riser neck 4, the riser base 3, and the riser sleeve 2 are all made of heat insulating material. Specifically, the inclined riser feeding technology can save the consumption of molten metal, the inclined riser seat 3 is made of heat-insulating materials, the geometric modulus of the volume of the molten metal in the riser seat 3 can be enlarged, and the enlargement coefficient is about 1.2. The normal side riser seat 3 is mostly formed by die bodies, and has larger volume and more molten metal consumption. The consumption of molten metal of the inclined riser seat 3 is saved by at least 20% compared with that of the normal side riser seat 3.
Preferably, the riser neck 4, the riser seat 3 and the riser sleeve 2 are all made of floating bead perlite thermal insulation materials or fiber thermal insulation materials serving as aggregates. Of course, other heat insulating materials can be selected for processing.
In addition to the above embodiments, the riser neck 4, the riser seat 3, and the riser sleeve 2 are an integral structure and are prefabricated members. Above-mentioned structure for riser cover 2 and riser seat 3 structure as an organic whole have avoided having the problem that has a die parting face to separately make between riser body and riser seat 3 among the prior art, have reduced preparation process and mould, save the cost, raise the efficiency.
On the basis of the above-described embodiments,
in a specific embodiment, the thermal joint body 1 is positioned on the casting 5 near the riser neck 4, namely the position on the casting 5 near the riser neck 4 is called as the thermal joint body 1, and the modulus of the thermal joint body 1 is set to be MBodyThe modulus M of the riser bush 2Sleeve≥1.2×MBodyModulus M of the riser neck 4Neck＝(0.8～1)×MBodyModulus M of the riser base 3Seat≥1.2×MBody。
It should be noted here that, the oblique riser seat 3 is adopted, so that the position of the riser sleeve 2 is inclined, and meanwhile, the thermal insulation material is matched, so that the liquid cooling speed in the oblique riser feeding system is reduced, and only the radius of the riser neck 4 can be properly reduced.
The oblique riser feeding system comprises a riser seat 3 and a riser neck 4, wherein the axis of the riser seat 3 is not perpendicular to the axis of the riser neck 4, the axis of the riser seat 3 inclines to form a certain angle theta with the vertical direction, the theta is 10-30 degrees, the bottom of the riser seat 3 is hemispherical, the radius is R, the upper part of the riser seat extends upwards from a central circle for a certain distance B which is approximately equal to 1/4-1/6R, the oblique part is connected with the cylindrical riser neck 4, the radius R1 is 0.4-0.67R, and the minimum length A is 0.57-0.77R, preferably 0.67R. The upper end surface of the riser seat 3 is made into a bayonet which is connected with the standard heating riser sleeve 2 and matched with the standard heating riser sleeve to form an inclined riser feeding system, as shown in figure 2.
Design scheme of standard test block of side riser: the feeding characteristic of the side feeder is required to be met, namely, the hot joint of the test block is arranged on the side surface of the middle of the test block, and the feeding requirement of the hot joint is completely realized by the side feeder. The modulus among the thermal joint body 1, the riser neck 4, the riser seat 3 and the riser sleeve 2 is required to meet the following parameter requirements, MSleeve≥1.2×MBody，MNeck＝(0.8～1)×MBody,MSeat≥1.2×MBody。
In a specific embodiment, aiming at 5 specifications of the oblique riser seats 3, 8-11, 3, 9-12, 3, 10-13, 3, 11-14, 3, 12-15, the diameter phi A of the thermal joint body 1 is 90-140mm, the total height H of the thermal joint body 1 is 90-140mm, the height H of the end face is 23-27mm, and the volume V of the thermal joint body 1 is 600-2200cm in the casting 5 corresponding to each riser seat 33The heat dissipation area S of the heat joint body 1 is 1.6-2.8cm2 Thermal segment 1 modulus MBody＝V/S，MBody1.70-2.80; modulus M of riser neck 4Neck1.80-2.7, modulus M of riser base 3Seat2.30-3.5, modulus M of riser bush 2SleeveIs 2.20-3.20.
5 oblique riser seats 3 and 5 test block modules are designed and manufactured according to the parameters. And arranging modeling and pouring after finishing. Through the dissection of the above 5 standard test blocks, it can be seen that the test block has no defect in the interior, the riser shrinks well, the shrinkage cavity is concentrated on the upper part of the riser body, and no shrinkage porosity exists in the riser seat 3 and the riser neck 4. The oblique riser base 3 is well matched with the riser sleeve 2, and the oblique riser system can provide reliable feeding for the casting when being used for feeding the side riser.
In the oblique riser feeding system provided by the embodiment, simulation of casting solidification simulation software, verification of standard test blocks and popularization and application in actual products prove that the oblique riser feeding system can overcome the defects of the traditional side riser, optimizes the manufacturing process of the side riser, can save the consumption of molten metal, improve the process yield, reduce the contact area between the riser neck 4 and a casting and save the cutting and cleaning cost.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The oblique riser feeding system provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. An oblique riser feeding system is characterized by comprising a riser neck (4), a riser seat (3) and a riser sleeve (2), wherein the riser neck (4) is connected with a heat joint body (1) of a casting (5), and the riser seat (3) is connected between the riser neck (4) and the riser sleeve (2); the riser sleeve (2) and the axis of the riser seat are arranged in the same direction and are inclined relative to the vertical direction.
2. The oblique riser feeding system according to claim 1, wherein the axial direction of the riser sleeve (2) and the axial direction of the riser neck (4) are at an angle of 60 ° -80 °.
3. The slant riser feeding system according to claim 1, wherein the bottom side wall of the riser seat (3) is spherical, the upper end of the riser seat (3) is provided with a bayonet to connect with the riser sleeve (2), and the other end of the riser seat (3) is connected with the riser neck (4); the riser seat (3) is connected with the riser neck (4) to form a whole.
4. The diagonal riser feeding system according to claim 3, wherein the circular arc radius of the riser seat (3) is R, the radius R1 of the riser neck (4) is 0.4-0.67R, and the minimum length A of the riser neck (4) is 0.57-0.67R.
5. The oblique riser feeding system according to claim 4, wherein the top of the riser seat (3) is provided with a cylindrical connecting part, the riser sleeve (2) is communicated with the connecting part, and the length B of the connecting part is 0.15-0.25R.
6. The oblique riser feeding system according to claim 1, wherein the end of the riser sleeve (2) far away from the riser base (3) is provided with an exhaust hole, and the middle position of the end of the riser sleeve (2) is provided with a tip part, and the exhaust hole is opened at a position close to the tip part.
7. The slant riser feeding system according to any one of claims 1 to 6, wherein the riser neck (4), the riser seat (3) and the riser sleeve (2) are all made of heat insulating material.
8. The slant riser feeding system according to claim 7, wherein the riser neck (4), the riser seat (3) and the riser sleeve (2) are all made of floating bead perlite insulation material or fiber insulation material as aggregate.
9. The diagonal riser feeding system according to any one of claims 1 to 6, wherein the riser neck (4), the riser seat (3) and the riser sleeve (2) are of unitary construction and are prefabricated.
10. The slant head feeding system according to any one of claims 1 to 6, wherein the thermal segment body (1) is located on the casting (5) near the riser neck (4), and the modulus of the thermal segment body is set to MBodyThe modulus M of the riser bush (2)Sleeve≥1.2×MBodyThe modulus M of the riser neck (4)Neck＝(0.8～1)×MBodyThe modulus M of the riser base (3)Seat≥1.2×MBody。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210184057.6A CN114535509A (en) | 2022-02-22 | 2022-02-22 | Slant rising head feeding system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210184057.6A CN114535509A (en) | 2022-02-22 | 2022-02-22 | Slant rising head feeding system |
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| CN114535509A true CN114535509A (en) | 2022-05-27 |
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| CN202210184057.6A Pending CN114535509A (en) | 2022-02-22 | 2022-02-22 | Slant rising head feeding system |
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Citations (9)
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|---|---|---|---|---|
| DE3516033A1 (en) * | 1985-05-04 | 1986-11-06 | L. Bregenzer Gießereibedarf GmbH & Co, 7000 Stuttgart | Method and feeder mould for the production of a feeder sleeve, in particular a lateral feeder sleeve, having a curved feeder duct |
| GB0523207D0 (en) * | 2005-11-15 | 2005-12-21 | Rolls Royce Plc | A turbine blade arrangement |
| DE202012010986U1 (en) * | 2012-11-15 | 2013-03-18 | Foseco International Ltd. | feeder system |
| CN205165748U (en) * | 2015-10-29 | 2016-04-20 | 兴化市雅兰机械制造有限公司 | Feeding head device |
| GB201609626D0 (en) * | 2016-06-02 | 2016-07-20 | Foseco Int | Feeder system |
| CN106955973A (en) * | 2017-05-18 | 2017-07-18 | 天润曲轴股份有限公司 | Cast rising head |
| CN211304684U (en) * | 2019-11-07 | 2020-08-21 | 中国第一汽车股份有限公司 | Side riser sleeve |
| CN214920264U (en) * | 2021-04-30 | 2021-11-30 | 河南省金太阳精密铸业股份有限公司 | Special heat-insulating riser for producing nodular iron castings |
| CN114054680A (en) * | 2021-11-05 | 2022-02-18 | 安徽省恒泰动力科技有限公司 | Single-cavity die for feeding riser and large-cylinder-diameter piston |
-
2022
- 2022-02-22 CN CN202210184057.6A patent/CN114535509A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3516033A1 (en) * | 1985-05-04 | 1986-11-06 | L. Bregenzer Gießereibedarf GmbH & Co, 7000 Stuttgart | Method and feeder mould for the production of a feeder sleeve, in particular a lateral feeder sleeve, having a curved feeder duct |
| GB0523207D0 (en) * | 2005-11-15 | 2005-12-21 | Rolls Royce Plc | A turbine blade arrangement |
| DE202012010986U1 (en) * | 2012-11-15 | 2013-03-18 | Foseco International Ltd. | feeder system |
| CN205165748U (en) * | 2015-10-29 | 2016-04-20 | 兴化市雅兰机械制造有限公司 | Feeding head device |
| GB201609626D0 (en) * | 2016-06-02 | 2016-07-20 | Foseco Int | Feeder system |
| CN106955973A (en) * | 2017-05-18 | 2017-07-18 | 天润曲轴股份有限公司 | Cast rising head |
| CN211304684U (en) * | 2019-11-07 | 2020-08-21 | 中国第一汽车股份有限公司 | Side riser sleeve |
| CN214920264U (en) * | 2021-04-30 | 2021-11-30 | 河南省金太阳精密铸业股份有限公司 | Special heat-insulating riser for producing nodular iron castings |
| CN114054680A (en) * | 2021-11-05 | 2022-02-18 | 安徽省恒泰动力科技有限公司 | Single-cavity die for feeding riser and large-cylinder-diameter piston |
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| 杜西灵等: "袖珍铸造工手册", pages: 1042 - 1054 * |
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