阅读说明：本技术 一种提高难充型高温合金复杂薄壁件充型能力的熔模 (investment pattern for improving mold filling capability of difficult-to-fill high-temperature alloy complex thin-wall part ) 是由 孙长波 李同同 周君华 王健楠 尚伟 于 2019-11-28 设计创作，主要内容包括：本发明涉及一种提高难充型高温合金复杂薄壁件充型能力的熔模,具体为所述熔模为对称结构,包括浇道系统和补贴；所述补贴呈一侧开口另一侧封闭状态,且底部与铸件底板相贯,所述补贴包括沿铸件边缘随铸件形状设计的补贴a和沿铸件对称中心设计补贴b,补贴a和补贴b在高度上齐平,所述补贴与铸件蜡模一体成型；所述浇道系统设有浇口杯,所述浇口杯连接有主浇道,主浇道包括一个直浇道、多个横浇道和多个楔形冒口c、多个楔形冒口d；在每个横浇道设有楔形冒口e或靴子形冒口,所述楔形冒口c、楔形冒口d、楔形冒口e、靴子形冒口均连接在所述补贴上。本发明有效减少了该产品的欠铸、裂纹及疏松的发生概率,提高了该产品的铸造合格率。(The invention relates to fusion molds for improving the mold filling capability of a difficult-to-fill high-temperature alloy complex thin-wall part, which are of symmetrical structures and comprise a pouring gate system and patches, wherein each patch is in a side opening and side closing state, the bottom of each patch is communicated with a casting bottom plate, each patch comprises a patch a designed along the edge of a casting along the shape of the casting and a patch b designed along the symmetrical center of the casting, the patches a and the patches b are flush in height, each patch is molded with a casting wax mold , the pouring gate system is provided with a pouring gate cup, the pouring gate cup is connected with a main pouring gate, the main pouring gate comprises straight pouring gates, a plurality of cross pouring gates, a plurality of wedge-shaped risers c and a plurality of wedge-shaped risers d, and a plurality of wedge-shaped boots d, each cross pouring gate is provided with a wedge-shaped riser e or a boot-shaped riser, and the wedge-shaped risers d, the wedge-shaped risers e and the wedge-shaped risers are all connected with the patches.)

The investment pattern for improving the mold filling capability of the difficult-to-fill high-temperature alloy complex thin-wall part is characterized in that the investment pattern is of a symmetrical structure and comprises a pouring gate system and a patch;

the patch is in a state that an side opening and a side closing are arranged, the bottom of the patch is communicated with a bottom plate of the casting, the patch comprises a patch a and a patch b, the patch a is designed along the edge of the casting along the shape of the casting, the patch b is designed along the symmetrical center of the casting, the cross section of the patch a is rectangular or T-shaped, the patch a and the patch b are flush in height, and the patch and the wax mold of the casting are molded;

the sprue system is provided with a sprue cup, the sprue cup is connected with a main sprue, the main sprue is formed by bodies, the main sprue comprises straight runners, a plurality of cross runners symmetrically connected to the left side and the right side of the straight runner, a plurality of wedge-shaped risers c and a plurality of wedge-shaped risers d symmetrically connected to the upper side and the lower side of the straight runner, wedge-shaped risers e or boot-shaped risers are arranged on the upper side and the lower side of each cross runner and perpendicular to the cross runners, and the wedge-shaped risers c, the wedge-shaped risers d, the wedge-shaped risers e and the boot-shaped risers are all connected to the patch.

2. The investment pattern for improving the mold filling capability of a refractory superalloy complex thin-walled part according to claim 1, wherein the radius of the fillet at the intersection of the patch and the bottom plate of the casting is 0.2 mm-0.6 mm, the distance from the side of the patch opening to the edge of the casting is 0.5 mm-4 mm, the width of the patch a is 0.5 mm-4 mm, the height of the patch a is 0.5 mm-3 mm, the distance from the outermost contour of the patch a to the edge of the casting is 0.5 mm-3 mm, the width of the patch b is 3 mm-10 mm when the patch b is rectangular, the width of the head of the T-shape is 4 mm-20 mm when the patch b is T-shaped, the length of the head of the T-shaped patch is 10mm, and the width of the tail of the T-shaped head of.

3. The investment pattern for improving the mold filling capability of a refractory superalloy complex thin-walled part according to claim 1, wherein the sprue has a total length of 194 mm-251 mm and is composed of two cylinders f and g with different sizes, the diameter of the upper end of the cylinder f is 40 mm-45 mm, the diameter of the cylinder g with a height of 15 mm-25 mm is 30 mm-35 mm, the height is 169 mm-226 mm, and the radius of the most terminal rounded corner is 15 mm-17.5 mm.

4. The investment pattern for improving the mold filling capability of a difficult-to-fill high-temperature alloy complex thin-walled part according to claim 1, wherein 2 crossroads are arranged on one side, the distance between the crossroads on one side is 43 mm-60 mm, the crossroads are shaped as cuboids with rounded corners, each crossroad has a width of 20 mm-25 mm, a height of 8 mm-18 mm and a length of 55 mm-70 mm, the radius of the rounded corner at the intersection of the crossroad and the sprue is 8 mm-12 mm, and the radius of the rounded corner at the outermost end is 3 mm-6 mm.

5. The investment pattern for improving the mold filling capability of a difficult-to-fill high-temperature alloy complex thin-walled part according to claim 1, wherein 2 wedge-shaped risers c are arranged on one side, the distance between the wedge-shaped risers c on one side is 22 mm-25 mm, the length of each wedge-shaped riser c is 30 mm-40 mm, the size of a small section is 3 mm-7 mm x 18 mm-25 mm, an angle of drawing from the long side of the small section to the axial direction of a sprue is 10-12 degrees, and the radius of a fillet at the intersection with the sprue is 8 mm-12 mm.

6. The investment pattern for improving the mold filling capability of a difficult-to-fill high-temperature alloy complex thin-walled part, according to claim 1, wherein the wedge-shaped risers d and the wedge-shaped risers c are in the same plane, the length of each wedge-shaped riser d is 30 mm-40 mm, the small cross-section dimension is 4 mm-20 mm x 10 mm-25 mm, the draft angle from the long side of the small cross-section to the axial direction of the sprue is 10-12 degrees, and the radius of the fillet from the intersection of the small cross-section and the sprue is 8 mm-12 mm.

7. The investment pattern for improving the mold filling capability of a refractory high-temperature alloy complex thin-wall part according to claim 1, wherein the number of the wedge-shaped risers e is four, the wedge-shaped risers e are symmetrically arranged on two cross runners on two sides of a sprue, the height of the wedge-shaped risers e is 20mm to 27mm, the minimum cross-sectional dimension is 2mm to 5mm x 12mm to 25mm, the maximum cross-sectional dimension is 6mm to 9mm x 12mm to 25mm, and the wedge-shaped risers e are intersected with a cuboid with the maximum cross section after being downwards pulled by an angle of 10 degrees to 12 degrees from a long side of the minimum cross section.

8. The fired mold of kinds of claim 1, which can improve the mold filling ability of refractory superalloy complex thin-walled parts, wherein the boot-shaped riser comprises four boot heads and four boot bodies, the boot heads are symmetrically arranged on two other cross runners on two sides of the sprue, the boot-shaped riser is 20mm to 24mm in height as a whole, the boot head is 2mm to 8mm in height, the boot head has a cross section size of 2mm to 5mm x 12mm to 20mm, the boot body intersects with the boot body after the boot head is pulled downwards by an angle of 10 ° to 12 ° from the long side of the boot head cross section, and the cross section size of the boot body is 6mm to 9mm x 9mm to 12 mm.

Technical Field

The invention relates to a precision casting technology of an aeroengine vector tail nozzle thin-wall part, in particular to fusion molds for improving the mold filling capacity of a difficult-to-fill high-temperature alloy complex thin-wall part

Background

The jet nozzle of an aircraft engine of a certain model is a JG4246A/K424 alloy large thin-wall part, has series advantages of light specific gravity, high-temperature strength, excellent oxidation resistance, high-temperature tissue stability and the like, and well meets the special requirements of high-temperature bearing and ablation resistance of vector jet nozzle thin-wall parts of three or four generations of aircraft engines on high-temperature strength, local thickness and the like, but has the characteristics of large length size, thin wall, multiple ribs and large local thickness, the maximum length size is 600mm, the thinnest of a bottom plate is 0.6mm, the length-thickness ratio reaches 1000: 1, the range of an alloy pasty area is large, and metallurgical defects such as under-casting, cracks, looseness and the like are easily generated in the investment casting process.

Disclosure of Invention

The invention provides investment patterns for improving the mold filling capacity of a difficult-to-fill high-temperature alloy complex thin-wall part, which can effectively improve the mold filling capacity of the thin-wall part and facilitate the molding of castings.

The technical scheme of the invention is as follows:

kinds of melting mold for improving the mold filling capability of the difficult-to-fill high temperature alloy complex thin-wall part, wherein the melting mold is of a symmetrical structure and comprises a pouring gate system and a patch:

the patch is in a state that an side opening and a side closing are arranged, the bottom of the patch is communicated with a bottom plate of the casting, the patch comprises a patch a and a patch b, the patch a is designed along the edge of the casting along the shape of the casting, the patch b is designed along the symmetrical center of the casting, the cross section of the patch a is rectangular or T-shaped, the patch a and the patch b are flush in height, and the patch and the wax mold of the casting are molded;

the sprue system is provided with a sprue cup, the sprue cup is connected with a main sprue, the main sprue is formed by bodies, the main sprue comprises straight runners, a plurality of cross runners symmetrically connected to the left side and the right side of the straight runner, a plurality of wedge-shaped risers c and a plurality of wedge-shaped risers d symmetrically connected to the upper side and the lower side of the straight runner, wedge-shaped risers e or boot-shaped risers are arranged on the upper side and the lower side of each cross runner and perpendicular to the cross runners, and the wedge-shaped risers c, the wedge-shaped risers d, the wedge-shaped risers e and the boot-shaped risers are all connected to the patch.

The investment patterns for improving the mold filling capability of the difficult-to-fill high-temperature alloy complex thin-wall part preferably have the scheme that the radius of a fillet at the intersection of the patch and a casting bottom plate is 0.2-0.6 mm, the distance from the side of the patch opening to the edge of the casting is 0.5-4 mm, the width of the patch a is 0.5-4 mm, the height of the patch a is 0.5-3 mm, the distance from the outermost contour of the patch a to the edge of the casting is 0.5-3 mm, when the patch b is rectangular, the width of the patch b is 3-10 mm, when the patch b is T-shaped, the width of the head of the T-shaped part is 4-20 mm, the length of the head of the T-shaped part is 10-25 mm, and the width of the tail of the T-shaped part is 3-10 mm.

The kinds of investment patterns for improving the mold filling capability of the difficult-to-fill high-temperature alloy complex thin-walled part preferably have the advantages that the sprue with the total length of 194 mm-251 mm is composed of two cylinders f and g with different sizes, the diameter of the upper end of each cylinder f is 40 mm-45 mm, the diameter of each cylinder g with the height of 15 mm-25 mm is 30 mm-35 mm, the height of each cylinder g is 169 mm-226 mm, and the radius of a fillet at the tail end is 15 mm-17.5 mm.

The kinds of fusible patterns for improving the mold filling capacity of the difficult-to-fill high-temperature alloy complex thin-wall part preferably comprise 2 transverse runners, wherein the distance between the transverse runners at one side is 43-60 mm, the transverse runners are cuboid with rounded corners, the width of each transverse runner is 20-25 mm, the height of each transverse runner is 8-18 mm, the length of each transverse runner is 55-70 mm, the radius of the rounded corner at the intersection of the transverse runners and the straight runners is 8-12 mm, and the radius of the rounded corner at the outermost end of each transverse runner is 3-6 mm.

The fusion molds for improving the mold filling capability of the refractory high-temperature alloy complex thin-wall part preferably comprise 2 wedge-shaped risers c on one side, wherein the distance between the wedge-shaped risers c on one side is 22-25 mm, the length of each wedge-shaped riser c is 30-40 mm, the size of a small section is 3-7 mm multiplied by 18-25 mm, an angle of drawing from the long side of the small section to the axial direction of a sprue is 10-12 degrees, and the radius of a fillet at the intersection of the small section and the sprue is 8-12 mm.

The fusion molds for improving the mold filling capability of the difficult-to-fill high-temperature alloy complex thin-walled part preferably have the following scheme that the wedge-shaped risers d and the wedge-shaped risers c are in the same plane, the length of each wedge-shaped riser d is 30-40 mm, the small section size is 4-20 mm multiplied by 10-25 mm, the angle of drawing from the long side of the small section to the axial direction of the sprue is 10-12 degrees, and the radius of the fillet at the intersection of the small section and the sprue is 8-12 mm.

The fusion molds for improving the mold filling capability of the refractory high-temperature alloy complex thin-wall part preferably comprise four wedge-shaped risers e symmetrically arranged on two cross runners on two sides of a sprue, wherein the height of each wedge-shaped riser e is 20-27 mm, the minimum cross section dimension is 2-5 mm multiplied by 12-25 mm, the maximum cross section dimension is 6-9 mm multiplied by 12-25 mm, and the wedge-shaped risers e are intersected with a cuboid with the maximum cross section after being downwards pulled by an angle of 10-12 degrees from the long edge of the minimum cross section.

The fusion molds for improving the mold filling capability of the difficult-to-fill high-temperature alloy complex thin-walled parts preferably comprise four boot-shaped risers and two boot main bodies, the boot-shaped risers are symmetrically arranged on the other two cross runners on the two sides of the straight runner, the overall height of the boot-shaped risers is 20-24 mm, the height of the boot head is 2-8 mm, the cross section dimension of the boot head is 2-5 mm multiplied by 12 mm-20 mm, the boot head is crossed with the boot main body after being downwards pulled by an angle of 10-12 degrees from the long edge of the boot head cross section, and the cross section dimension of the boot main body is 6-9 mm multiplied by 9 mm-12 mm.

The invention has the beneficial effects that:

all the risers are arranged on the patch, when molten metal is poured into the sprue cup, the molten metal enters the cross gate through the sprue, and then directly flows into the patch and a casting through the riser wedge-shaped risers c, the wedge-shaped risers d, the wedge-shaped risers e and the boot-shaped risers, so that the probability of occurrence of under-casting, cracking and loosening of the product can be effectively reduced, the casting qualification rate of the product is improved, the master alloy material for production is saved, and the production cost is reduced.

Drawings

FIG. 1 is a front side view of a refractory superalloy complex thin-walled part;

FIG. 2 is a top view of a refractory superalloy complex thin-walled part;

FIG. 3 is a schematic diagram of investment and casting wax patterns for improving the mold filling capability of a refractory superalloy complex thin-wall part;

FIG. 4 is a schematic view of a patch

FIG. 5 is a schematic view of the formed patch and wax pattern of casting

FIG. 6 is a schematic view of the main runner

FIG. 7 is a schematic diagram showing the shapes of a wedge-shaped riser c, a wedge-shaped riser d and a wedge-shaped riser e

FIG. 8 is a schematic view of a boot-shaped riser

In the figure: 1-a runner system; 2-patch application; 3-pouring cup; 4-main pouring channel; 5-straight pouring channel; 6-horizontal pouring channel; 7-a wedge riser c; 8-a wedge-shaped riser d; 9-wedge riser e; 10-boot-shaped riser

Detailed Description

All directional indicators such as up, down, left, right, front, and rear … … in the embodiment of the present invention are only used to explain the relative positional relationship between the components, the movement, etc. at a certain posture (as shown in the drawing), and if the certain posture is changed, the directional indicator is changed accordingly.

As shown in fig. 1-2, the profile size of the difficult-to-fill high temperature alloy complex thin-walled part related to the invention is 200.5mm × 100mm, the thickness of the bottom plate is divided into left and right ends, the thickness of the bottom plate at the left end is 0.6 mm-2.0 mm, the thickness of the bottom plate at the right end is 0.6 mm-0.8 mm, the thickness of main force-bearing ribs in the middle is about 0.6 mm-1.0 mm, the overall structure is that the rib longitudinal and transverse cross thickness is 0.6 mm-1 mm, and for the difficult-to-fill high temperature alloy complex thin-walled part, the following investment pattern is designed:

as shown in FIG. 3, kinds of melting molds for improving the mold filling capability of the refractory high-temperature alloy complex thin-wall part are symmetrical structures and comprise a pouring gate system 1 and a patch 2:

as shown in fig. 3 to 5, the patch 2 is in a state that the -side opening and the -side opening are closed, the bottom of the patch is penetrated through a casting bottom plate, the patch comprises a patch a2a and a patch b2b, the patch a2a is designed along the edge of the casting along the shape of the casting, the patch b2b is designed along the symmetrical center of the casting, the cross section of the patch is rectangular or T-shaped, the patch a2a and the patch b2b are flush in height, the patch 2 and a casting wax mold are molded, the radius of a fillet at the penetrating part of the patch 2 and the casting bottom plate is 0.3mm, the opening side of the patch 2 is 2mm away from the edge of the casting, the width of the patch a2a is 0.5mm, the height of the patch a2 is 0.5mm to 3mm, the distance from the outermost contour of the patch a2a to the edge of the casting is 0.6mm, when the patch b2 is 6mm, the width of the patch b b is 6mm, and the tail of the rectangular is 22mm, and when the head is 22 mm.

As shown in FIGS. 3-6:

the sprue system is provided with a sprue cup 3, the sprue cup is connected with a main sprue 4, the main sprue 4 is formed, the main sprue 4 comprises straight runners 5, a plurality of cross runners 6 symmetrically connected to the left side and the right side of the straight runners, a plurality of wedge-shaped risers c7 and a plurality of wedge-shaped risers d8, the wedge-shaped risers e9 or boot-shaped risers 10 are arranged on the upper side and the lower side of each cross runner 6 and are perpendicular to the cross runners, and the wedge-shaped risers c7, the wedge-shaped risers d8, the wedge-shaped risers e9 and the boot-shaped risers 10 are all connected to the patch.

The total length of the sprue 5 is 195mm, the sprue is composed of two cylinders f5a and g5b, the cylinders f5a are 41mm in diameter at the upper end and 16mm in height, the cylinders g5b are 30mm in diameter and 179mm in height, and the radius of the most end of the sprue is 15 mm.

6 unilateral of runner set up 2, and the interval between the 6 unilateral runners is 44mm, 6 shapes of runner set up to the cuboid that has the radius angle, and 6 wide 22mm of every runner, the height is 12mm, and is long 55mm, and 6 and 5 through-going department radius angles of runner are 10mm, and the outermost end radius angle is 5 mm.

The single side of the wedge-shaped risers c7 is provided with 2 wedge-shaped risers c7, the distance between the wedge-shaped risers c7 is 23.5mm, the length of each wedge-shaped riser c7 is 31.96mm, the size of the small section is 5.4mm multiplied by 21.6mm, an angle is drawn from the long side of the small section to the axial direction of the sprue by 10 degrees, and the radius of a fillet at the intersection part of the small section and the sprue 5 is 10 mm.

The wedge-shaped risers d8 and the wedge-shaped risers c7 are in the same plane, the length of each wedge-shaped riser d8 is 31.96mm, the size of the small section is 9.5mm multiplied by 21.6mm, an angle is drawn from the long side of the small section to the axial direction of the sprue by 10 degrees, and the radius of a fillet at the intersection part of the small section and the sprue 5 is 10 mm.

The number of the wedge-shaped risers e9 is four, the wedge-shaped risers e9 are symmetrically arranged on two cross runners 6 positioned on two sides of a sprue 5, the height of the wedge-shaped risers e9 is 23.96mm, the minimum section size is 3mm multiplied by 23.5mm, the maximum section size is 8.3 multiplied by 23.5mm, and the wedge-shaped risers e9 are downwards pulled by an angle of 10 degrees from the long edge of the minimum section and then are intersected with the cuboid with the maximum section.

The boot-shaped riser 10 comprises two parts, namely a boot head 10a and a boot main body 10b, the number of the boot-shaped riser is four, the boot-shaped riser 10 is symmetrically arranged on the other two cross runners 6 positioned on two sides of the sprue 5, the integral height of the boot-shaped riser 10 is 23.96mm, the height of the boot head 10a is 7mm, the cross section size of the boot head is 3mm multiplied by 18mm, the boot head is intersected with the boot main body 10b after being downwards pulled by an angle of 10 degrees from the long edge of the cross section of the boot head, and the cross section size of the boot main body 10b is 8.3mm multiplied by 10 mm.