CN215919032U

CN215919032U - Cast steel auto-parts anti-shrinkage and anti-loosening device

Info

Publication number: CN215919032U
Application number: CN202121999788.3U
Authority: CN
Inventors: 于海忠
Original assignee: Donggang Canhua Foundry
Current assignee: Donggang Canhua Foundry
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-03-01
Anticipated expiration: 2031-08-24

Abstract

The utility model discloses a shrinkage-loosening prevention device for cast steel automobile parts, and relates to the technical field of shrinkage-loosening prevention of cast steel automobile parts. The utility model comprises a casting main body and a mould assembly, wherein the casting main body is arranged in the mould assembly, the mould assembly comprises a base, a lower template fixedly connected to the base and an upper template movably connected to the lower template, and the upper template is positioned right above the lower template; the sand mould is fixedly arranged inside the lower template, the center inside the sand mould is fixedly connected with the casting main body, the center of the top of the sand mould is provided with a cooling hole, the cooling hole is the same as the shape and the size of the chill, the cooling hole is positioned under the chill, the chill is movably arranged inside the cooling hole and slides inside the cooling hole, and the bottom of the chill and the top of the casting main body form a blind hole. According to the utility model, the blind hole of the casting main body is cooled by adding the chiller, so that the shrinkage porosity can be avoided, and the chiller is driven by the cylinder to leave the interior of the blind hole, so that the method is simple and effective.

Description

Cast steel auto-parts anti-shrinkage and anti-loosening device

Technical Field

The utility model belongs to the technical field of shrinkage porosity prevention of cast steel automobile parts, and particularly relates to a shrinkage porosity prevention device for cast steel automobile parts.

Background

Some automobile parts are manufactured by adopting a steel casting mode, liquid metal is poured into a prefabricated mould of a casting box when the automobile parts are cast, the liquid metal is cooled and formed in the mould to obtain corresponding parts, and the shrinkage porosity phenomenon is easily generated in the casting forming process, because the liquid metal or alloy feeding shrinkage is not obtained in the finally solidified area of the casting to form dispersed and fine shrinkage cavities which are usually dispersed in the axial line area, the thick and large part, the riser root and the vicinity of an inner pouring gate of the wall thickness of the casting; when the volume of the shrinkage porosity is the same as that of the shrinkage cavity, the distribution area of the shrinkage porosity is much larger than that of the shrinkage cavity; the shrinkage porosity is hidden in the casting and is not easy to be found in appearance.

At present, when automobile parts are cast, shrinkage porosity is generated in the casting process of cast steel automobile parts due to structural reasons, the product quality is unstable, the quality of the automobile parts is low, and the rejection rate is high.

The situation that shrinkage porosity is easily generated in the casting process of the conventional cast steel automobile part is solved, and therefore a shrinkage porosity prevention device for the cast steel automobile part is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a shrinkage porosity prevention device for cast steel automobile parts, which solves the problem that shrinkage porosity is easy to generate in the casting process of the existing cast steel automobile parts.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to a cast steel auto-parts shrinkage-loosening prevention device, which comprises a casting main body and a mould assembly, wherein the casting main body is arranged in the mould assembly, the mould assembly comprises a base, a lower template fixedly connected to the base and an upper template movably connected to the lower template, and the upper template is positioned right above the lower template; the base is fixedly connected with a lifting assembly, a circular through hole is formed in the center of the top of the upper template, an anti-shrinkage component is movably arranged in the circular through hole, a casting main body is used as a cast automobile accessory, the base is used for supporting an integral anti-shrinkage device, a sand mold is fixed in the lower template, a model cavity of the casting main body is prefabricated in the sand mold in advance and used for casting metal liquid to the interior, and the upper template is used for fixing the casting main body;

the lifting assembly comprises a first mounting block, a screw rod, a motor, a support rod and a kit, wherein the bottom of the first mounting block is mounted on one side of the top of the base, a movable hole is formed in the center of the first mounting block, the screw rod is movably arranged in the movable hole, the bottom of the screw rod penetrates through the base and is fixedly connected to the output end of the motor, and the top of the motor is fixedly connected to the bottom of the base; the first mounting block is used for mounting and fixing the lead screw, the lead screw is used for driving the upper template connected with the external member to slide up and down, the motor is used for driving the lead screw to rotate, the support rod is used for supporting the upper template, and the lead screw drives the upper template to slide so as to drive the other external member to slide on the support rod;

the anti-loosening component comprises an air cylinder, a connecting rod, a fixing shaft and a chill, wherein the chill is movably arranged in the circular through hole, the top of the chill is fixedly connected with the fixing shaft, one end of the connecting rod is fixedly connected to the top of the fixing shaft, the other end of the connecting rod is fixedly connected to an output shaft of the air cylinder, the bottom of the air cylinder is fixedly connected to the top of the upper template, the position of the air cylinder is close to the lead screw, the air cylinder is used for driving the connecting rod to drive the fixing shaft to slide up and down, so that the chill can slide to the inside of the sand mold to form a blind hole in a casting body, the blind hole is cooled to avoid loosening, the connecting rod is used for connecting the air cylinder and the fixing shaft, and the fixing shaft is used for connecting the chill at the bottom;

the cooling hole is the same as the shape and size of a chiller, the cooling hole is located under the chiller, the chiller is movably arranged inside the cooling hole and slides inside the cooling hole, a blind hole is formed in the bottom of the chiller and the top of the casting main body, the chiller slides downwards to extend into a sand mold cavity filled with metal liquid through the cooling hole formed in the sand mold, and a gap is reserved between the bottom of the chiller and the bottom of the cavity, so that the metal liquid can be filled in the gap, a blind hole equal to the cross section area of the chiller is formed in the center of the blind hole, the inside of the blind hole is cooled, and shrinkage porosity is avoided.

Preferably, the die assembly further comprises four support legs, the four support legs are respectively and fixedly connected to corner positions of the bottom of the base, and the support legs are used for supporting the base.

Preferably, the lifting assembly further comprises a second mounting block, the top of the second mounting block is fixedly connected with a supporting rod, the bottom of the second mounting block is fixedly connected to the base, the second mounting block and the first mounting block are symmetrically distributed about the central axis of the lower template, and the second mounting block is used for supporting the fixed supporting rod.

Preferably, the base central point puts and has seted up the fixed slot, the tank bottom and the lower bolster fixed connection of fixed slot finish through earlier the inside sand mould of lower bolster to place the lower bolster inside the fixed slot of base, fix a position fixedly.

Preferably, a liquid inlet hole and a gas outlet hole are formed in the sand mold, the liquid inlet hole and the gas outlet hole are symmetrical about the center of the cooling hole, the liquid inlet hole is used for injecting metal liquid, and the gas outlet hole is used for exhausting gas in the cavity of the sand mold, so that the sand mold is prevented from collapsing.

Preferably, the material of the cold iron is high-carbon steel.

The utility model has the following beneficial effects:

according to the utility model, the lower template capable of moving up and down is arranged, so that the casting main body can be fixed when the chiller is separated from the blind hole of the casting main body, the chiller with the size consistent with that of the blind hole required by the casting main body is arranged, when the metal liquid is poured into the sand mold, the chiller enters the cavity filled with the metal liquid in the sand mold through the cooling hole, a gap is reserved between the bottom of the chiller and the bottom of the cavity, so that the casting main body forms the cavity, the chiller is added to cool the blind hole of the casting main body, the occurrence of shrinkage porosity can be avoided, and the chiller is driven to leave the interior of the blind hole through the cylinder, so that the method is simple and effective.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of an anti-loosening device for cast steel automobile parts according to the present invention;

FIG. 2 is a schematic structural diagram of a cast steel auto-parts shrinkage-proof device according to the present invention;

FIG. 3 is a schematic sectional view of a cast steel automobile accessory shrinkage-proof device according to the present invention;

FIG. 4 is a schematic sectional view of a cast steel automobile accessory shrinkage-proof device in a casting state;

FIG. 5 is an enlarged view taken at A of FIG. 4 in accordance with the present invention;

FIG. 6 is a schematic structural view of a casting body of the anti-loosening device for cast steel automobile parts, which is disclosed by the utility model;

FIG. 7 is an enlarged view of the utility model at B in FIG. 1.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a casting body; 2. a support leg; 3. a base; 4. a first mounting block; 5. a second mounting block; 6. a screw rod; 7. a motor; 8. a support bar; 9. a kit; 10. mounting a template; 11. a lower template; 12. sand molding; 13. A cylinder; 14. a connecting rod; 15. a fixed shaft; 16. and (5) performing cold iron.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-7, the utility model is a cast steel auto-parts anti-loosening device, comprising a casting main body 1 and a mold assembly, wherein the casting main body 1 is arranged inside the mold assembly, the mold assembly comprises a base 3, a lower template 11 fixedly connected to the base 3, and an upper template 10 movably connected to the lower template 11, and the upper template 10 is positioned right above the lower template 11; the base 3 is fixedly connected with a lifting assembly, a circular through hole is formed in the center of the top of the upper template 10, an anti-shrinkage component is movably arranged in the circular through hole, the casting main body 1 is used as a cast automobile accessory, the base 3 is used for supporting an integral anti-shrinkage device, a sand mold 12 is fixed in the lower template 11, a model cavity of the casting main body 1 is prefabricated in the sand mold 12 in advance and used for casting metal liquid to the interior, and the upper template 10 is used for fixing the casting main body 1;

the lifting assembly comprises a first mounting block 4, a screw rod 6, a motor 7, a support rod 8 and a sleeve 9, wherein the bottom of the first mounting block 4 is mounted on one side of the top of the base 3, a movable hole is formed in the center of the first mounting block 4, the screw rod 6 is movably arranged in the movable hole, the bottom of the screw rod 6 penetrates through the base 3 and is fixedly connected to the output end of the motor 7, and the top of the motor 7 is fixedly connected to the bottom of the base 3; the external members 9 are movably arranged on the circumferential side surface of the screw rod 6, the external members 9 are two, the two external members 9 are respectively fixedly connected to two opposite sides of the upper template 10, the supporting rod 8 is movably arranged in the other external member 9, the supporting rod 8 and the screw rod 6 are symmetrically distributed about the axis of the upper template 10, the first mounting block 4 is used for mounting and fixing the screw rod 6, the screw rod 6 is used for driving the upper template 10 connected with the external members 9 to slide up and down, the motor 7 is used for driving the screw rod 6 to rotate, the supporting rod 8 is used for supporting the upper template 10, and the upper template 10 is driven to slide through the screw rod 6, so that the other external member 9 is driven to slide on the supporting rod 8;

the shrinkage-loosening prevention assembly comprises a cylinder 13, a connecting rod 14, a fixing shaft 15 and a chilling block 16, wherein the chilling block 16 is movably arranged inside a circular through hole, the fixing shaft 15 is fixedly connected to the top of the chilling block 16, one end of the connecting rod 14 is fixedly connected to the top of the fixing shaft 15, the other end of the connecting rod 14 is fixedly connected to an output shaft of the cylinder 13, the bottom of the cylinder 13 is fixedly connected to the top of the upper template 10, the cylinder 13 is close to the screw rod 6, the cylinder 13 is used for driving the connecting rod 14 to drive the fixing shaft 15 to slide up and down, so that the chilling block 16 can slide into the sand mold 12 to form a blind hole in the casting body 1 and cool the blind hole, shrinkage loosening is avoided, the connecting rod 14 is used for connecting the cylinder 13 and the fixing shaft 15, and the fixing shaft 15 is used for connecting the chilling block 16 at the bottom;

the inside fixed sand mould 12 that is provided with of lower bolster 11, the inside central point of sand mould 12 puts and 1 fixed connection of foundry goods main part, cooling hole has been seted up to sand mould 12 top central point, cooling hole is the same with chill 16's shape and size, and the cooling hole is located chill 16 under, chill 16 activity sets up in the cooling hole inside and slides at the cooling hole inside, the chill 16 bottom forms the blind hole with 1 top of foundry goods main part, through the cooling hole of seting up on sand mould 12, the chill 16 slides downwards and extends to inside the sand mould 12 cavity of being filled with metal liquid, the space is left with the bottom of cavity to the chill 16 bottom, thereby metal liquid can fill the space position, form the blind hole that equals with chill 16 cross sectional area to the central point, and cool off the blind hole is inside, avoid appearing the shrinkage porosity.

The mould assembly further comprises four supporting legs 2, the four supporting legs 2 are respectively fixedly connected to corner positions at the bottom of the base 3, and the supporting legs 2 are used for supporting the base 3.

The lifting assembly further comprises a second mounting block 5, a supporting rod 8 is fixedly connected to the top of the second mounting block 5, the bottom of the second mounting block 5 is fixedly connected to the base 3, the second mounting block 5 and the first mounting block 4 are symmetrically distributed relative to the central axis of the lower template 11, and the second mounting block 5 is used for supporting the supporting rod 8.

The fixed slot has been seted up to 3 central points of base put, the tank bottom and the 11 fixed connection of lower bolster of fixed slot, through finishing with 11 inside sand moulds 12 of lower bolster earlier to place lower bolster 11 inside the fixed slot of base 3, fix a position fixedly.

A liquid inlet hole and a gas outlet hole are formed in the sand mold 12, the liquid inlet hole and the gas outlet hole are symmetrical about the center of the cooling hole, the liquid inlet hole is used for injecting metal liquid, and the gas outlet hole is used for exhausting gas in the cavity of the sand mold 12, so that the sand mold 12 is prevented from collapsing.

The material of the chiller 16 is high carbon steel.

When the sand mold 12 is prefabricated in the lower template 11, the lower template 11 is placed in the fixing groove on the base 3, used for positioning and fixing, metal liquid is poured into the liquid inlet hole on the sand mould 12, when the cavity in the sand mould 12 is filled with the metal liquid, a part of the metal liquid overflows from the gas outlet hole, the motor 7 is started to drive the screw rod 6 to rotate, thereby driving the upper template 10 connected with the sleeve 9 to slide downwards, the chiller 16 on the upper template 10 passes through the preset cooling hole and extends into the cavity inside the sand mould 12, because a gap is reserved between the bottom of the chilling block 16 and the bottom of the cavity, a blind hole is formed in the cavity filled with the metal liquid, and the blind holes are cooled by the chilling blocks 16, so that the shrinkage porosity prevention effect is achieved, and after the casting main body 1 is formed, the cylinder 13 drives the fixed shaft 15 connected with the connecting rod 14 to slide upwards, so as to drive the chilling block 16 to be separated from the inside of the blind hole upwards.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a cast steel auto-parts prevents shrinkage porosity device, includes foundry goods main part (1) and mould subassembly, its characterized in that: the casting main body (1) is arranged in a mold assembly, the mold assembly comprises a base (3), a lower template (11) fixedly connected to the base (3), and an upper template (10) movably connected to the lower template (11), and the upper template (10) is positioned right above the lower template (11); the base (3) is fixedly connected with a lifting assembly, a circular through hole is formed in the center of the top of the upper template (10), and an anti-loosening assembly is movably arranged in the circular through hole;

the lifting assembly comprises a first mounting block (4), a screw rod (6), a motor (7), a support rod (8) and a sleeve piece (9), the bottom of the first mounting block (4) is mounted on one side of the top of the base (3), a movable hole is formed in the center of the first mounting block (4), the screw rod (6) is movably arranged in the movable hole, the bottom of the screw rod (6) penetrates through the base (3) and is fixedly connected to the output end of the motor (7), and the top of the motor (7) is fixedly connected to the bottom of the base (3); external members (9) are movably arranged on the peripheral side surface of the screw rod (6), two external members (9) are arranged, the two external members (9) are respectively and fixedly connected to two opposite sides of an upper template (10), a support rod (8) is movably arranged in the other external member (9), and the support rods (8) and the screw rod (6) are symmetrically distributed around the central axis of the upper template (10);

the anti-loosening component comprises an air cylinder (13), a connecting rod (14), a fixing shaft (15) and a chiller (16), wherein the chiller (16) is movably arranged in the circular through hole, the top of the chiller (16) is fixedly connected with the fixing shaft (15), the top of the fixing shaft (15) is fixedly connected with one end of the connecting rod (14), the other end of the connecting rod (14) is fixedly connected to an output shaft of the air cylinder (13), the bottom of the air cylinder (13) is fixedly connected to the top of the upper template (10), and the position of the air cylinder (13) is close to the screw rod (6);

the casting mold is characterized in that a sand mold (12) is fixedly arranged inside the lower template (11), the center of the inside of the sand mold (12) is fixedly connected with the casting main body (1), a cooling hole is formed in the center of the top of the sand mold (12), the cooling hole is identical to a chiller (16) in shape and size, the cooling hole is located under the chiller (16), the chiller (16) is movably arranged inside the cooling hole and slides inside the cooling hole, and a blind hole is formed in the bottom of the chiller (16) and the top of the casting main body (1).

2. A cast steel automobile accessory anti-shrinkage-porosity device according to claim 1, wherein the mold assembly further comprises four legs (2), and the four legs (2) are respectively fixedly connected to the bottom corner positions of the base (3).

3. The cast steel automobile accessory anti-loosening device according to claim 1, wherein the lifting assembly further comprises a second mounting block (5), a support rod (8) is fixedly connected to the top of the second mounting block (5), the bottom of the second mounting block (5) is fixedly connected to the base (3), and the second mounting block (5) and the first mounting block (4) are symmetrically distributed about the central axis of the lower template (11).

4. The cast steel automobile accessory shrinkage-proof device as claimed in claim 1, wherein a fixing groove is formed in the center of the base (3), and the groove bottom of the fixing groove is fixedly connected with the lower template (11).

5. The cast steel automobile accessory anti-shrinkage-porosity device as claimed in claim 1, wherein the sand mold (12) is provided with an inlet hole and an outlet hole, and the inlet hole and the outlet hole are symmetrical with respect to the center of the cooling hole.

6. A cast steel auto-parts anti-shrinkage porosity device according to claim 1, characterized in that the material of the chill (16) is high carbon steel.