CN108015232B

CN108015232B - Preparation process of front driven plate seat of vehicle

Info

Publication number: CN108015232B
Application number: CN201711376862.4A
Authority: CN
Inventors: 王大志
Original assignee: Maanshan Sanfeng Machinery Manufacturing Co Ltd
Current assignee: Maanshan Sanfeng Machinery Manufacturing Co Ltd
Priority date: 2017-12-19
Filing date: 2017-12-19
Publication date: 2020-02-14
Anticipated expiration: 2037-12-19
Also published as: CN108015232A

Abstract

The invention discloses a preparation process of a vehicle front driven plate seat, and belongs to the field of casting processing. The invention comprises the following steps: step one, smelting molten steel, wherein the molten steel comprises the following components: 0.25-0.3%, Si: 0.2-0.5%, Mn: 0.5-0.9%, Ni: 0.4-0.5%, Cu: 0.3-0.4%; step two, manufacturing a foam pattern and a pouring system, and vibrating and compacting the foam pattern and the pouring system in a sand box; the pouring system comprises a sprue, a cross gate and a branch gate, the branch gate is connected with the foam pattern, and a non-axisymmetric pouring cup is arranged at the top of the sprue; step three, pouring the smelted molten steel to ensure that the foam pattern in the sand box disappears and a casting is formed; and step four, taking out the casting after cooling and cleaning the casting. The invention overcomes the defects of high labor intensity, low processing efficiency and the like in the prior art for processing the front driven plate seat of the vehicle, can effectively reduce the processing labor intensity, improve the processing efficiency, avoid the structural deformation of the front driven plate seat, ensure the processing precision and effectively improve the processing qualified rate of products.

Description

Preparation process of front driven plate seat of vehicle

Technical Field

The invention relates to the technical field of casting processing, in particular to a preparation process of a front driven plate seat of a vehicle.

Background

The front driven plate seat is a part of a vehicle buffer device, is an important stressed part for vehicle running traction and braking buffer, and has great influence on the service performance due to the processing precision. At present, a machining mode is generally adopted for machining the front driven plate seat, but the machining has the defects of low machining precision, high machining labor intensity, low machining efficiency and the like, and the structural requirement of the front driven plate seat is difficult to meet when the front driven plate seat is machined by using a common lost foam casting process, so that the front driven plate seat is easy to generate structural deformation, and the machining qualified rate is low. How to effectively improve the production qualification rate of the front slave plate seat and ensure the processing quality of the front slave plate seat is a difficult problem which needs to be solved urgently in the industry.

Through retrieval, the Chinese patent application number: 2016111753278, filing date: in 2016, 12 and 19 days, the invention and creation name is as follows: the application discloses a lost foam casting process, which comprises the following steps: 1. producing a foam pattern or a pouring system in a forming machine by adopting a metal foaming mould; 2. bonding the pattern and the pouring channel into a die bundle module; 3. soaking and hanging the water-based paint on the modular bundle module by using a coating machine; 4. putting the mould bundle module into a sand box, and filling dry sand; 5. drying the sand grains and the module group at the temperature of 20-400 ℃ for 18-24 hours; 6. vibrating and molding by using a vibrating table to fill dry sand into an inner cavity of a sand box and compact the sand box, and sealing the sand box by using a plastic film to place a pouring cup; 7. pouring to enable the foam pattern in the sand box to be gasified and disappear to form a casting, and vacuumizing during pouring; 8. and after the casting is cooled, taking out the casting for shakeout and cleaning casting heads of the cut casting.

Also as in chinese patent application No.: 2015108014098, filing date: 11/19/2015, the name of the invention creation is: a lost foam casting method and a cast product, which application discloses a lost foam casting method and a cast product, the method comprising: putting the lost foam white mold after coating and drying into a sand box; filling dry sand into the sand box to complete the molding; vacuumizing the sand box and pouring; wherein, the yielding position of disappearance mould white mould is provided with the support piece that is used for preventing this yielding position to take place to warp. The support piece is utilized to support the easy-deformation part, so that the deformation of the lost foam white mold in the processes of coating, mold assembling and molding can be prevented, and a casting with a required shape can be obtained after the casting is finished.

The applications all optimize the common lost foam casting process, but the method cannot be directly applied to the casting processing of the front driven plate seat of the vehicle, cannot meet the requirements of the front driven plate seat on the processing precision and the shape structure, and still has a space for further optimization.

Disclosure of Invention

1. Technical problem to be solved by the invention

The invention aims to overcome the defects of high labor intensity, low processing efficiency and the like in the processing of the front driven plate seat of the vehicle in the prior art, and provides a preparation process of the front driven plate seat of the vehicle.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention relates to a preparation process of a front driven plate seat of a vehicle, which comprises the following steps:

step one, smelting molten steel, wherein the molten steel comprises the following components in percentage by mass: 0.25-0.3%, Si: 0.2-0.5%, Mn: 0.5-0.9%, Ni: 0.4-0.5%, Cu: 0.3-0.4%;

step two, manufacturing a foam pattern and a pouring system, and vibrating and compacting the foam pattern and the pouring system in a sand box;

the pouring system comprises a sprue, a cross gate and a branch gate which are connected in sequence, the branch gate is connected with the foam pattern, a pouring cup with a downward tapered opening is arranged at the top of the sprue, and the pouring cup is of a non-axisymmetric structure;

step three, pouring the smelted molten steel to ensure that the foam pattern in the sand box disappears and a casting is formed;

and step four, after the casting is cooled, taking out the casting and carrying out subsequent cleaning.

Further, the peripheral sidewall of the pouring cup comprises a conical wall on one side and an arcuate wall on the other side in smooth transition with the conical wall, the cross-sectional contour of the arcuate wall being an outwardly convex arc.

Furthermore, a filter screen made of ceramic materials is arranged at the bottom of the straight pouring channel.

Furthermore, the specific weight of the foam for preparing the foam pattern is 10-22g/cm³。

Furthermore, a deoxidizer is added into the molten steel when the molten steel is discharged.

Furthermore, aluminum with the purity of 98-99 percent is added into the molten steel as a deoxidizer when the molten steel is discharged.

Furthermore, the adding amount of the aluminum is 1.8 to 2.2 percent of the mass of the molten steel.

Furthermore, the pouring of the molten steel is finished within 25min after the molten steel is taken out of the furnace.

Furthermore, the pouring of the molten steel is finished within 10-15min after the molten steel is taken out of the furnace.

Further, the temperature of molten steel pouring is 1620-.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:

(1) according to the preparation process of the front driven plate seat of the vehicle, the components of the molten steel are closely matched with all working procedures, the front driven plate seat can be processed and finished only by adopting a casting working procedure, additional machining is not needed, the operation is simple, the labor intensity is low, the production cost is reduced, the casting meets various requirements of the front driven plate seat on the processing size, the surface quality and the like, the production qualified rate is high, and the preparation process is suitable for popularization and application.

(2) The invention relates to a preparation process of a front driven plate seat of a vehicle, which is used for preparing a foam pattern with the foam specific weight of 10-22g/cm³The casting method has the advantages that the casting method has a stable recarburization effect on molten steel, is small in deformation, is beneficial to controlling the shrinkage ratio and the surface quality of a casting, and guarantees the pouring quality of the front slave plate.

(3) According to the preparation process of the front driven plate seat of the vehicle, aluminum is added into molten steel as a deoxidizer when the molten steel is discharged, the pouring of the molten steel is controlled to be finished within 25min, the adding time of the deoxidizer is matched with the pouring time of the molten steel, after an aluminum wire is molten, the aluminum wire slowly floats upwards to take away bubbles in the pouring distance of pouring the molten steel due to light specific gravity, air is prevented from entering the molten steel again through the control of the pouring time, the defects of oxide layers, air holes and the like formed on the surface of a casting are avoided, and the pouring quality is guaranteed.

(4) According to the preparation process of the vehicle front slave plate seat, the sprue cup at the top of the sprue is of a non-axisymmetric structure, the circumferential side wall of the sprue cup comprises the conical wall on one side and the arc wall on the other side, the section contour line of the arc wall is an arc line protruding outwards, molten steel forms rotary circulation flow by arranging the arc wall, impurities are prevented from being directly washed away, discharged gas can be released in the rotating process of the molten steel, reverse splashing of the molten steel is avoided, gas inclusion is reduced, the pouring flow speed of the molten steel can be increased, the pouring quality of the molten steel is fully guaranteed, the defects of slag inclusion, gas holes and the like of a casting are reduced, and the processing quality and the qualification rate of the casting are obviously improved.

(5) According to the preparation process of the vehicle front slave plate seat, the filter screen made of ceramic materials is arranged at the bottom of the sprue, so that oxidizing slag, impurities and the like in molten steel can be effectively filtered, the probability that the impurities enter a mold is reduced, the defect that the impurities, the residues and the like enter a casting is prevented, the preparation process is matched with an asymmetric sprue cup, the initial pouring process and the post flowing process of the molten steel are effectively controlled, the cleanness of the molten steel is comprehensively guaranteed, and the pouring quality is improved.

(6) According to the preparation process of the vehicle front driven plate seat, the filter screen is arranged between the upper connecting section and the lower connecting section, the filtering area of the filter screen can be effectively increased through the gradual expansion type design of the upper connecting section, the sufficient and efficient filtering of molten steel is guaranteed, the filtering blockage is prevented through the reasonable design of the filtering holes, and the gradual contraction type design of the lower connecting section is beneficial to further improving the flowing speed of the molten steel and guaranteeing the pouring quality.

Drawings

FIG. 1 is a schematic diagram of a front slave plate holder according to the prior art;

FIG. 2 is a schematic top view of a front slave plate holder according to the prior art;

FIG. 3 is a side view of a prior art front follower base;

FIG. 4 is a schematic view of the construction of a pouring cup according to the invention;

FIG. 5 is a schematic structural view of a sprue of the present invention;

fig. 6 is a schematic flow chart of a process for manufacturing a front sub-mount for a vehicle according to the present invention.

The reference numerals in the schematic drawings illustrate:

101. a base; 102. a back plate; 103. a vertical plate; 104. a fixing hole; 105. mounting holes;

200. a pouring cup; 201. a tapered wall; 202. an arcuate wall; 203. a bonding section;

300. a sprue; 301. an upper connecting section; 302. filtering with a screen; 303. a lower connecting section.

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be further described with reference to the following examples.

Example 1

As shown in fig. 1-3, the structural schematic diagram of a vehicle front slave seat in the prior art is shown, the front slave seat includes a base 101, a back plate 102 is disposed on one side of the base 101, four vertical plates 103 are further disposed on the base 101 at regular intervals and connected to the back plate 102, fixing holes 104 are symmetrically disposed on two sides of the back plate 102, a plurality of mounting holes 105 distributed in a bar shape are disposed between two adjacent vertical plates 103 on the base 101, and the mounting holes 105 are uniformly arranged at intervals. In practice, the requirement on the machining precision of the mounting holes 105 and the fixing holes 104 is high, particularly the requirement on the size machining tolerance of the plurality of mounting holes 105 which are closely arranged is within +/-0.5 mm, the requirement on the surface quality of the hole wall is extremely high, the shrinkage ratio of a casting is difficult to accurately control by using a common lost foam casting technology, the size precision of the plurality of mounting holes 105 on the casting cannot be guaranteed, the problem of deformation of the mounting holes 105 often occurs, various casting defects easily occur on the hole wall, and the machining qualification rate is extremely low.

In order to improve the production qualification rate as much as possible, the front driven plate seat is generally produced by adopting a mode of combining machining or casting machining and machining in the industry, wherein the mode of combining casting and machining is more widely applied, namely, a front driven plate seat body structure consisting of a base 101, a back plate 102 and a vertical plate 103 is firstly processed by adopting a conventional lost foam casting process, then a mechanical machining mode is adopted, a fixing hole 104 and a mounting hole 105 are processed by a reamer, the machining precision of the holes can be guaranteed by adopting a high-precision machine tool, the problems of deformation and casting defects are avoided, the product qualification rate is improved to a certain extent, but the machining mode needs to combine two completely different machining modes, the process conversion is time-consuming and labor-consuming, the hole positions need to be continuously adjusted and aligned during machining, the installation and positioning need to be detached again after the cutter is worn, and the operation is complex and time-consuming, the labor intensity is high, the processing cost of high-precision machine tool equipment is high, and the production benefit of enterprises is influenced, so that how to fully adopt a more simple and convenient low-cost lost foam casting process to meet the high-specification quality requirement of the front driven plate seat becomes a hotspot of research in the industry. The lost foam casting method of the present embodiment was developed to solve this problem.

The preparation process of the front driven plate seat of the vehicle of the embodiment, as shown in fig. 6, includes the following steps:

step one, smelting molten steel, specifically smelting by adopting B-grade steel, wherein the molten steel comprises the following components in percentage by mass: 0.25%, Si: 0.2%, Mn: 0.9%, Ni: 0.5%, Cu: 0.3 percent; and unavoidable trace impurities;

step two, manufacturing a foam pattern and a pouring system, and vibrating and compacting the foam pattern and the pouring system in a sand box; wherein, the step one and the step two have no obvious sequence; the foam pattern is manufactured according to the structure of a front slave plate seat, the foam pattern is consistent with the structure of the front slave plate seat (comprising a fixing hole 104 and a mounting hole 105), a foaming mold can be used for manufacturing in a forming machine, a pouring system comprises a sprue 300, a cross gate and a branch gate which are sequentially connected, the foam pattern and the pouring system are bonded into a module, the branch gate is connected with the foam pattern, the module is soaked with water-based paint by a paint machine, then the module is placed in a sand box and filled with dry sand, the sand and the module are dried, after drying, the dry sand is filled in the inner cavity of the sand box and compacted by vibration molding, the sand box is sealed by a plastic film, a sprue cup 200 is placed, and the sprue cup 200 is connected with the top of the sprue 300; a riser for feeding is also arranged on the foam pattern, and the foam pattern, a pouring system, the production and the bonding of the riser and the like belong to the conventional technology, and are not detailed herein;

step three, pouring the smelted molten steel to ensure that the foam pattern in the sand box disappears and a casting is formed, and vacuumizing during pouring;

and step four, after the casting is cooled, taking out the casting for shakeout, cutting off a casting riser and performing subsequent cleaning.

The embodiment guarantees the machining precision of the front driven plate seat through the process control of each process, wherein the control of the components of molten steel is particularly important and directly influences the shrinkage ratio of a casting and the forming quality of the casting, the deformation of the casting is difficult to control when the shrinkage ratio is higher than C, Mn, the content of C also influences the formation of air holes, C in air easily enters the molten steel when the content of C is too low, and the entering of air easily causes the formation of defects such as an oxide layer, air bubbles and the like in the casting. In the embodiment, the controllability of the whole process is ensured by accurately controlling the components of the molten steel and combining the mutual matching of all the steps. Firstly, the specific weight of the foam for preparing the foam pattern is 10-22g/cm³Specifically, 10g/cm in this example³The specific gravity of the foam not only influences the quality of a pouring surface, but also influences the shrinkage ratio of a casting, and long-term practice summary and theoretical exploration show that the foam with the specific gravity is lighter, larger in granularity, easy to deform and larger in surface roughness, and the precision of a formed casting is difficult to control and poor in surface quality; the foaming particle size is smaller when the foaming particle size is too heavy, but the foam recarburization is high, the recarburization effect is unstable, the content of carbon in molten steel is fluctuated, the shrinkage ratio of a casting is unstable and difficult to control, and specifically, a foam pattern is melted and combusted at high temperature to generate CO when the molten steel is poured₂The mold is made of foam, the carbon content in the molten steel can be stably increased by 0.03-0.04% through melting and burning in the pouring process, the subsequent recarburization effect of the foam mold is considered when the molten steel is smelted, the initial carbon content is controlled to be 0.25-0.3%, and the casting still keeps a good contraction ratio after subsequent recarburization.

In this embodiment, a deoxidizer is added to the molten steel during tapping of the molten steel, specifically, aluminum with a purity (aluminum content) of 98-99% is used as the deoxidizer, and waste aluminum wire or aluminum particles commonly used in production can be used, and the addition amount of aluminum is 2.2% of the mass of the molten steel. The molten steel is effectively deoxidized by adding the aluminum wire and the aluminum particles, and various defects such as oxide layers and bubbles in castings are prevented. The adding time of the deoxidizer in the embodiment is matched with the pouring time of the molten steel, the pouring is finished within 25min after the molten steel is discharged, and the pouring temperature is 1620 ℃. In the embodiment, aluminum wire and aluminum particles are added when molten steel is discharged from a furnace, the whole pouring process is quickly finished after a deoxidizer is added, the aluminum wire can be melted within 2-5min, and bubbles are slowly floated upwards and taken away in the pouring distance of pouring the molten steel due to the light specific weight of aluminum, so that the pouring quality of a casting is guaranteed; once the pouring time exceeds the control, the deoxidizer floats upwards within the pouring distance, and then air enters the molten steel again to form oxide layers, air holes and other defects on the surface of the final casting. According to the embodiment, long-term practice is found out, the problems are effectively solved by adding the aluminum deoxidizer during tapping and controlling the pouring time, the defects of castings are reduced, the pouring quality is improved, and support is provided for ensuring the machining precision of the front slave plate seat.

According to the casting processing method, through tight matching of molten steel components and various working procedures, the front driven plate seat can be processed only through the casting working procedure without additional machining, the operation is simple, the labor intensity is low, the production cost is reduced, the casting meets various requirements of the front driven plate seat on processing size, surface quality and the like, the production yield is high, the produced casting is detected, the tensile strength is larger than or equal to 485MPa, the yield point is larger than or equal to 260MPa, the elongation is larger than or equal to 24%, the reduction of area is larger than or equal to 36%, the impact absorption is larger than or equal to 20J (at minus 7 ℃), the comprehensive performance is excellent, and the use requirements are met.

Example 2

The process for manufacturing a front slave plate holder of a vehicle in the present embodiment is substantially the same as that in embodiment 1, and further, the design of the gating system in the present embodiment is also not negligible, as shown in fig. 4, the gating system in the present embodiment includes a sprue 300, a runner and a branch runner which are connected in sequence, the branch runner is connected with a foam pattern, a sprue cup 200 with a downward tapered opening is disposed at the top of the sprue 300, and the sprue cup 200 has a non-axisymmetric structure. During pouring, molten steel is poured into the pouring cup 200 and sequentially enters the foam pattern through the sprue 300, the cross gate and the branch gate, the conical or funnel-shaped pouring cup 200 with a good flow guiding effect is generally adopted in the industry, but the molten steel still easily has the problems of impurities, oxidation and the like in practical application, casting defects such as slag inclusion air holes and the like can still be formed in a casting, and the common conical pouring cup 200 cannot meet the high-specification requirements of the casting.

The pouring cup 200 of the embodiment adopts a non-axisymmetric structure, the circumferential side wall of the pouring cup 200 comprises a tapered wall 201 on one side and an arc-shaped wall 202 on the other side, the tapered wall 201 is in a straight line with an inclined cross section, the arc-shaped wall 202 is in an arc line with an outward bulge, that is, an included angle between a tangent line of the arc-shaped wall 202 and a horizontal plane is gradually increased from bottom to top, wherein an included angle α between a tangent line at the bottom of the cross section of the arc-shaped wall 202 and the horizontal plane is 10 degrees, particularly α degrees in the embodiment, the bottom of the pouring cup 200 is a combining section 203 connected with a straight runner 300, correspondingly, the combining section 203 is also in a non-axisymmetric structure, the circumferential side wall of the combining section 203 comprises a tapered side wall on one side and a cylindrical side wall with a smooth transition connection with the tapered side wall, the cross section of the tapered side wall is in a straight line with an inclined line parallel connection with the cross section of the tapered wall, and the cross section of the other side (i.e., the cylindrical side wall) of the.

In the embodiment, the ceramic pouring cup 200 is adopted, the diameter of the top opening of the pouring cup 200 is at least three times of the inner diameter D of the sprue 300, and is specifically three times in the embodiment, wherein the opening size of the arc-shaped wall 202 is far larger than that of the conical wall 201, the transverse distance D1 between the top and the bottom of the cross-section contour line of the arc-shaped wall 202 is not smaller than 1.5 times and is specifically 1.5 times of the inner diameter D of the sprue 300.

Example 3

The manufacturing process of a vehicle front slave plate seat in this embodiment is substantially the same as that in embodiment 2, and further, in this embodiment, a filter screen 302 made of ceramic is further disposed at the bottom of the sprue 300, as shown in fig. 5, specifically, an upper connection section 301 with an opening gradually expanding from top to bottom is disposed at the bottom of the sprue 300, a lower connection section 303 with an opening gradually reducing from top to bottom is disposed below the upper connection section 301, and the filter screen 302 is disposed between the upper connection section 301 and the lower connection section 303. The diameter of the filter screen 302 is at least twice (specifically twice in this embodiment) of the inner diameter of the sprue 300, the filter screen 302 is uniformly provided with filter holes, the diameter of the filter holes is 2-4mm, and the distance between the filter holes (the distance between the hole walls of two adjacent filter holes) is 5-6 mm.

In the embodiment, the ceramic filter screen 302 is adopted to effectively filter oxidation slag, impurities and the like in the molten steel, reduce the probability of the impurities entering the mold, prevent the impurities, residues and the like from entering the casting to cause defects, and is matched with the asymmetric sprue cup 200 to effectively control the initial pouring process and the post flowing process of the molten steel, so that the cleanness of the molten steel is comprehensively ensured, and the pouring quality is improved; the ceramic filter screen 302 has good high-temperature working strength, thermal shock resistance and molten metal flow impact resistance, and has extremely high mechanical strength and mechanical impact resistance, so that the filling is smooth and reliable, the filtering area of the filter screen 302 can be effectively increased by the gradually expanding design of the upper connecting section 301, the sufficient and efficient filtering of molten steel is ensured and the filtering blockage is prevented by the reasonable design of the filtering holes, and the gradually contracting design of the lower connecting section 303 is favorable for further improving the flowing speed of the molten steel and ensuring the pouring quality.

Example 4

The manufacturing process of the front driven plate seat of the vehicle in the embodiment is basically the same as that in the embodiment 1, except that in the step one of the embodiment, the molten steel comprises the following components in percentage by mass, C: 0.3%, Si: 0.5%, Mn: 0.5%, Ni: 0.4%, Cu: 0.4 percent; and unavoidable trace impurities; the specific gravity of the foam for manufacturing the model in the second step is 22g/cm³(ii) a In the third step, the adding amount of aluminum is 2.0 percent of the mass of the molten steel when the molten steel is discharged, and the pouring of the molten steel is finished within 10-15min after the molten steel is discharged, wherein the pouring temperature of the molten steel is 1680 ℃.

Example 5

The manufacturing process of the front driven plate seat of the vehicle in the embodiment is basically the same as that in the embodiment 1, except that in the step one of the embodiment, the molten steel comprises the following components in percentage by mass, C: 0.28%, Si: 0.3%, Mn: 0.6%, Ni: 0.45%, Cu: 0.45 percent; and unavoidable trace impurities; the specific gravity of the foam for manufacturing the model in the second step is 20g/cm³(ii) a In the third step, the adding amount of aluminum is 1.8 percent of the mass of the molten steel when the molten steel is discharged, and the pouring is finished within 15min after the molten steel is discharged, wherein the pouring temperature of the molten steel is 1650 ℃.

Example 6

The process for manufacturing a front slave plate holder of a vehicle in the present embodiment is substantially the same as that in embodiment 3, except that in the present embodiment, an included angle α between a tangent line at the bottom of a cross-sectional contour line of the arc-shaped wall 202 and a horizontal plane is 20 °, a diameter of an opening at the top of the pouring cup 200 is 4 times an inner diameter D of the sprue 300, wherein the opening size of the arc-shaped wall 202 is much larger than that of the tapered wall 201, a transverse distance D1 between the top and the bottom of the cross-sectional contour line of the arc-shaped wall 202 is 2.5 times the inner diameter D of the sprue 300, and a diameter of the filter screen 302 is 2.5 times the inner diameter D of the sprue 300.

Example 7

The process for manufacturing a front slave plate holder of a vehicle of the present embodiment is substantially the same as that of embodiment 3, except that in this embodiment, an included angle α between a tangent line at the bottom of a cross-sectional contour line of the arc-shaped wall 202 and a horizontal plane is 15 °, a diameter of an opening at the top of the pouring cup 200 is 4.5 times an inner diameter D of the sprue 300, wherein the opening size of the arc-shaped wall 202 is much larger than that of the tapered wall 201, a transverse distance D1 between the top and the bottom of the cross-sectional contour line of the arc-shaped wall 202 is 3 times the inner diameter D of the sprue 300, and a diameter of the filter screen 302 is 3 times the inner diameter D of the sprue 300.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. The utility model provides a preparation technology of slabstone before vehicle, a serial communication port, preceding slabstone includes base (101), one side of base (101) is equipped with backplate (102), it is equipped with four risers (103) and links to each other with backplate (102) still even interval on base (101), and the bilateral symmetry of backplate (102) has seted up fixed orifices (104), set up a plurality of mounting holes (105) that are the bar distribution on base (101) between two adjacent risers (103), and even interval arrangement of a plurality of mounting holes (105), the preparation of slabstone includes following step before this:

the pouring system comprises a sprue (300), a cross runner and a branch runner which are connected in sequence, the branch runner is connected with a foam pattern, a pouring cup (200) with a downward tapered opening is arranged at the top of the sprue (300), the pouring cup (200) is of a non-axisymmetric structure, the circumferential side wall of the pouring cup (200) comprises a conical wall (201) on one side and an arc-shaped wall (202) with the other side connected with the conical wall (201) in a smooth transition mode, the section contour line of the conical wall (201) is an inclined straight line, the section contour line of the arc-shaped wall (202) is an outward convex arc line, an included angle α between a tangent line at the bottom of the section contour line of the arc-shaped wall (202) and a horizontal plane is 10-20 degrees, the bottom of the pouring cup (200) is a connecting section (203) connected with the straight runner (300), the connecting section (203) is also of a non-axisymmetric structure, the circumferential side wall of the connecting section (203) comprises a conical side wall on one side and a cylindrical side wall with the smooth transition of the conical side wall, the cylindrical side wall, the conical side wall is connected with the straight runner (300), the straight runner, the connecting section contour line D of the straight runner (202) is at least three times of the inclined straight line D, the inclined straight line of the connecting section contour line D of the straight runner (1, the straight runner (202), the straight line of the;

step three, pouring the smelted molten steel to ensure that the foam pattern in the sand box disappears and a casting is formed; when the molten steel is taken out of the furnace, aluminum with the purity of 98-99 percent is added into the molten steel as a deoxidizer, the adding amount of the aluminum is 1.8-2.2 percent of the mass of the molten steel, and the pouring is finished within 10-15min after the molten steel is taken out of the furnace;

2. The process of claim 1, wherein the step of preparing a front compliant seat for a vehicle comprises: the bottom of the sprue (300) is provided with a filter screen (302) made of ceramic materials.

3. The process of claim 1, wherein the step of preparing a front compliant seat for a vehicle comprises: the pouring temperature of the molten steel is 1620-.