CN115700153A - Casting mold with adjusting function and casting production process - Google Patents
Casting mold with adjusting function and casting production process Download PDFInfo
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- CN115700153A CN115700153A CN202211592320.1A CN202211592320A CN115700153A CN 115700153 A CN115700153 A CN 115700153A CN 202211592320 A CN202211592320 A CN 202211592320A CN 115700153 A CN115700153 A CN 115700153A
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Abstract
The invention provides a casting mould with an adjusting function and a casting production process, wherein the casting mould comprises a sand box and a cavity template, the sand box comprises an upper sand shell and a lower sand shell which are spliced with each other, and the plane where the upper sand shell and the lower sand shell are spliced with each other is a splicing surface; the casting mould is used for being matched with any one of the upper sand shell and the lower sand shell so as to form a half mould cavity through sand filling, the sand filling height of the sand box corresponding to the half mould cavity is h1, one end of the sand box, far away from the opening of the half mould cavity, is a sand filling end, and the distance between the end surface of the sand filling end and the corresponding half mould cavity is h2; wherein h1 and h2 satisfy the following relation of formula 1: equation 1: h1 is more than h2 and less than or equal to 2/3 (h 1+ h 2). The invention solves the technical problem that the qualified rate of the demolding is reduced due to improper connecting position between the adjusting assembly for fixing the mutually spliced sand shells and the sand shells.
Description
Technical Field
The invention relates to the technical field of metal casting, in particular to a casting mold with an adjusting function and a casting production process.
Background
Casting is a method in which liquid metal is cast into a casting cavity that conforms to the shape of a part, and after it is cooled and solidified, a part or a blank is obtained. The cast material is mostly metal which is originally solid but is heated to be liquid, and the material of the casting mould can be sand, metal or even ceramic.
However, the related art has at least one of the following technical problems: a hookup location between the adjustment assembly that is used for the sand shell of fixed mutual concatenation and the sand shell is improper, leads to the problem that has reduced the qualification rate of demolding.
Disclosure of Invention
The invention solves the technical problem that the qualified rate of the demolding is reduced due to improper connecting position between the adjusting assembly for fixing the mutually spliced sand shells and the sand shells.
In order to solve the problems, the invention provides a casting mold with an adjusting function, which comprises a sand box and a cavity template, wherein the sand box comprises an upper sand shell and a lower sand shell which are spliced with each other, and the plane where the upper sand shell and the lower sand shell are spliced with each other is a splicing surface; the casting mold is used for being matched with any one of the upper sand shell and the lower sand shell so as to form a half mold cavity through sand filling, the height of the sand filling where the half mold cavity is correspondingly formed by the upper sand shell is h1, one end, far away from the half mold cavity, of the opening of the upper sand shell is a sand filling end, and the distance between the end face where the sand filling end is located and the bottom of the corresponding half mold cavity is h2; wherein h1 and h2 satisfy the following relation of formula 1: equation 1: h1 is more than h2 and less than or equal to 2/3 (h 1+ h 2); the casting mold further comprises an adjustment assembly for tensioning the cope and drag, the adjustment assembly comprising: the first tensioning piece is connected to the first matching groove of the upper sand shell and provided with a connecting part and a matching part, the connecting part extends out of the upper sand shell through the first matching groove, and the matching part is abutted to the inner cavity of the upper sand shell; the matching part is provided with an arc-shaped surface structure, the arc-shaped surface structure faces the direction of the inner cavity, the distance formed between the first matching groove and the splicing surface is h3, and h1 is not less than h3 and not more than h1+ h2; the second tensioning piece is arranged opposite to the first tensioning piece, is connected to the second matching groove of the lower sand shell and has the same structure as the first tensioning piece; when the locking piece locks the first tensioning piece and the second tensioning piece, the swept volume of the matching part (312) swinging in the inner cavity is V, and then the V meets the following formula 2: equation 2: v is more than or equal to K2 multiplied by V1 and less than or equal to K1 multiplied by V1; k2 is a lower limit coefficient of cavity change, K1 is an upper limit coefficient of cavity deformation, and V1 is a cavity volume formed by splicing an upper sand shell and a lower sand shell.
Compared with the prior art, the technical scheme has the following technical effects: specifically speaking, this technical scheme is through the hookup location of reasonable setting between adjusting part and the sand box to avoid stretching into the distance between the cooperation portion of inner chamber and the die cavity template too near or too far and reduce the qualification rate of demolding. In combination with the actual casting process, if h2 is too large, the excessive heat is dissipated by the abrasive belt at the position corresponding to h2 in the cooling process of the casting liquid in the cavity of the half mold, so that the whole demolding is too small due to the excessive cooling rate of demolding; if h1 is too large, the mold cavity is too large due to too large thermal expansion degree, and even the mold cavity is crushed, so that the shape of the product is changed except for the increase in size.
In one example of the invention, the upper sand shell is the same structure as the lower sand shell; the inner cavity of the upper sand shell has sand burying slope from the sand filling end to the direction of the splicing surface, so that the area of the enclosed cross section of the upper sand shell is gradually reduced from the sand filling end to the direction of the splicing surface; the matching part is provided with a first matching inclined plane and a second matching inclined plane which are used for matching with the corresponding inner side wall of the inner cavity, and the first matching inclined plane and the second matching inclined plane are sequentially arranged along the direction of the sand filling end towards the splicing surface; and a matching included angle is formed between the first matching inclined plane and the second matching inclined plane; when the second matching inclined plane is attached to the corresponding inner side wall of the inner cavity, the connecting part and the groove bottom surface of the first matching groove form an angle with the same size as the matching included angle; when the first tensioning member and the second tensioning member are locked through the locking member, the matching part swings in the inner cavity so that the first matching inclined surface is attached to the inner side wall.
In one example of the invention, the connecting part is a long-strip-shaped rod piece, and the long-strip-shaped rod piece is fixedly connected with one side, close to the inner cavity, of the matching part through the corresponding first matching groove; the matching part is of a spherical shell structure or a cylindrical shell structure, a first circle center corresponding to the matching part is O1, a second circle center which is driven by the connecting part to swing in the inner cavity is O2, and a connecting line of the first circle center and the second circle center is coplanar with a motion track of the connecting part in the corresponding first matching groove; one end of the matching part, which is far away from the splicing surface, is a first extrusion end, and one end of the matching part, which is close to the splicing surface, is a second extrusion end; in the direction from the first extrusion end to the second extrusion end, the cross-sectional area surrounded by the matching part is increased and then reduced.
In one example of the invention, the cavity template is provided with a cavity shell for forming a cavity of the half mould, and when the cavity template is connected with the matching end of the upper sand shell far away from the sand filling end, a first distance arranged along the transverse direction is formed between the matching part and the cavity shell; the adjusting assembly comprises: the guide inclined surface structure is arranged at the first extrusion end and/or the first extrusion end and is positioned at one side of the first extrusion end and/or the first extrusion end, which is far away from the connecting part; the area of the corresponding matching part swinging in the cavity is partially overlapped with the cavity shell in the transverse direction; and the partial superposition at least comprises the bottom position of the corresponding cavity shell far away from the opening of the cavity shell; when the first tensioning piece and the second tensioning piece are locked through the locking piece, the second extrusion end moves towards the direction close to the cavity shell, the first extrusion end moves towards the direction far away from the cavity shell, and the connecting rod is attached to the bottom surface of the first matching groove.
In one embodiment of the invention, the sand box is provided with a positioning bulge corresponding to the position of the adjusting component; the adjusting assembly is provided with a first mounting waist-shaped groove, the first mounting waist-shaped groove is formed in the first tensioning piece and the second tensioning piece, and the first mounting waist-shaped groove is used for being matched with the locking piece; the casting mold further includes: the transverse correcting component is in threaded connection with the first tensioning piece and the second tensioning piece and is matched with the corresponding positioning protrusion; the angle reader is connected to the position, corresponding to the adjusting assembly, of the sand box and used for measuring the angle between the outer side wall, provided with the adjusting assembly, of the sand box and the adjusting assembly; when the matching part of the first tensioning member and/or the matching part of the second tensioning member swings in the inner cavity, the angle formed between the outer side wall and the adjusting component is changed.
In one example of the present invention, the positioning projection is a positioning cylinder; the adjusting component is provided with a connecting plate corresponding to the positioning cylinder, and the connecting plate is provided with a screw hole; the lateral correction assembly includes: the correcting screw is in threaded connection with the corresponding screw hole; the positioning plate is fixedly connected with the correcting screw rod and is positioned on one side, close to the sand box, of the connecting plate; one end of the spring part is sleeved on the correcting screw rod, the other end of the spring part is sleeved on the corresponding positioning cylinder, and the spring part is clamped between the positioning plate and the sand box; wherein, adjust the alignment screw and make the locating plate move towards the direction that is close to or keeps away from corresponding location cylinder to the spring part that the messenger located wherein takes place to deform.
In one example of the invention, the flask is provided with a mating end disposed opposite the sand-packed end, the cavity template being mounted to the mating end; a plurality of pre-buried holes are formed in the circumferential position along the matching end, and a plurality of connecting holes matched with the pre-buried holes are formed in the cavity template; the casting mold includes: and the guide rod assembly is inserted into the plurality of pre-buried holes and the plurality of connecting holes correspondingly.
In another aspect, the present invention also provides a casting production process applied to the casting mold according to any one of the above examples; the casting production process comprises the following steps: s1, placing a cavity template on a horizontal plane, wherein the side of the cavity template, which is provided with a cavity shell, faces upwards; the side surface of the cavity template, which is correspondingly provided with the cavity shell, is provided with a limiting clamping groove, and the limiting clamping groove is arranged around the circumference of the cavity shell; s2, adjusting the position of the upper sand shell relative to the cavity shell so that the upper sand shell is clamped into the limiting clamping groove; the cavity shell comprises a cavity body and a first pouring channel communicated with the cavity body; s3, mounting the first tensioning piece to the first matching groove so that the matching part is attached to the inner side wall corresponding to the upper sand shell; s4, filling sand into the sand filling end to fill the inner cavity with the sand; s5, finishing the sand to enable the sand to be flush with the end face where the sand filling end is located, covering the sealing plate on the sand filling end, and then placing the upper sand shell and the cavity mold in an inverted mode to enable the cavity mold to be located above the upper sand shell in the vertical direction; s6, taking down the cavity template from the upper sand shell so as to form a corresponding half mold cavity in the upper sand shell; step S7, matching the cavity template with the lower sand shell, installing a second tensioning piece into a second matching groove, filling sand into the inner cavity of the lower sand shell, and taking down the cavity template from the lower sand shell to obtain a corresponding cavity of the other half mold; s8, splicing the obtained lower sand shell with the half mold cavities to an upper sand shell to form a complete cavity consisting of the two half mold cavities; and S9, connecting the locking piece with the first tensioning piece and the second tensioning piece to fix the upper sand shell and the lower sand shell, and pouring liquid into a pouring channel communicated with the complete cavity to obtain a crude product.
Compared with the prior art, the technical scheme has the following technical effects: technical effects corresponding to the technical solutions in any of the above examples can be achieved, and are not described herein again.
In one example of the invention, the crude product is a buffer; dressing the sand so that the device is flush with the end face where the sand packed end is located comprises: s51, weighing the upper sand shell with the cavity template and filled with sand to obtain a first weight; step S52, comparing the calculated first weight with a corresponding standard weight; step S53, if the weight difference between the first weight and the standard weight is within the error range; and step S54, after the sealing plate is covered on the sand filling end, the upper sand shell and the cavity mold are inverted, so that the cavity mold is positioned above the upper sand shell in the vertical direction.
In an embodiment of the present invention, step S9 specifically includes: step S91, locking the upper sand shell and the lower sand shell through locking pieces; step S92, measuring an included angle formed between the adjusting component and the corresponding outer side wall of the sand box, and judging whether the included angle and the swing angle of the matching part in the inner cavity meet pouring conditions or not; step S921, if yes, pouring a pouring liquid through a pouring channel communicated with the complete cavity to obtain a crude product; and step S922, if not, adjusting the position of the adjusting component relative to the sand box until the included angle and the swinging angle of the matching part in the inner cavity meet the pouring condition.
After the technical scheme of the invention is adopted, the following technical effects can be achieved:
(1) Specifically speaking, the connecting position between the adjusting component and the sand box is reasonably arranged, so that the phenomenon that the distance between the matching part extending into the inner cavity and the cavity template is too close or too far to reduce the qualified rate of the demolding is avoided. In combination with the actual casting process, if h2 is too large, too much heat is carried away by the abrasive belt corresponding to h2 in the cooling process of the casting liquid in the cavity of the half mold, so that the whole demolding is too small due to too large cooling rate; if h1 is too large, the mold cavity is too large due to too large thermal expansion degree, and even the mold cavity is collapsed, so that the size of the product is increased, and the shape of the product is changed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and 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 structural diagram of a casting mold according to an embodiment of the present invention;
FIG. 2 is a schematic view of a portion of the internal structure of FIG. 1;
FIG. 3 is a schematic view of the mating relationship of the cavity mold plate, the cope flask and the first retaining member;
FIG. 4 is a schematic view of the mating relationship between the mating assembly and the upper sand shell;
FIG. 5 is an enlarged view taken at A in FIG. 4;
FIG. 6 is a simplified illustration of the engagement of the first tension member with the inner side wall and the first engagement channel;
FIG. 7 is a schematic view of the first tension member engaged with the cavity of the mold half and the upper shell;
fig. 8 is a schematic flow chart of a casting production process according to a second embodiment of the present invention.
Description of the reference numerals:
100-casting a mold; 10-a sand box; 101-a mold half cavity; 102-a splicing surface; 103-sand filling end; 104-a mating end; 105-an outer sidewall; 106-pouring channel; 107-lumen; 108-direction of oscillation; 109-an inner side wall; 11-sanding; 111-a first mating groove; 1111-the bottom of the groove; 112-positioning cylinder; 12-removing sand shell; 20-a cavity template; 21-a cavity housing; 211-bottom; 30-an adjustment assembly; 31-a first tensioning member; 311-a connecting portion; 312-a mating portion; 3121-first extrusion end; 3122-a second extrusion end; 313-an arcuate face structure; 32-a second tension member; 33-a connecting plate; 34-a first mounting waist groove; 40-a lateral corrective component; 41-straightening screw; 42-a positioning plate; 43-a spring member; 50-angle reader.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The first embodiment is as follows:
referring to fig. 1, it is a schematic structural diagram of a casting mold 100 with an adjusting function according to a first embodiment of the present invention. With reference to fig. 2-7, the casting mold 100 includes a sand box 10 and a cavity template 20, the sand box 10 includes an upper sand shell 11 and a lower sand shell 12 that are jointed together, and a joint plane 102 is a plane where the upper sand shell and the lower sand shell are jointed together; the casting mold 100 is used to cooperate with either one of the upper shell 11 and the lower shell 12 so that the half mold cavity 101 is formed by sand-packing; the sand filling height of the upper sand shell 11 corresponding to the formed half mold cavity 101 is h, the end of the upper sand shell 11, far away from the opening of the half mold cavity 101, is a sand filling end 103, and the distance between the end surface where the sand filling end 103 is located and the corresponding half mold cavity 101 is h; wherein h and h satisfy the relationship of the following formula: equation 1: h1 is more than h2 and less than or equal to 2/3 (h 1+ h 2).
The casting mold 100 further comprises an adjustment assembly 30 for tightening the upper sand shell 11 with the lower sand shell 12, the adjustment assembly 30 comprising a first tension member 31, a second tension member 32 and a locking member. The first tension member 31 is connected to the first matching groove 111 of the upper sand shell 11, the first tension member 31 is provided with a connecting part 311 and a matching part 312, the connecting part 311 extends out of the upper sand shell 11 through the first matching groove 111, and the matching part 312 is abutted to the inner cavity 107 of the upper sand shell 11; the matching part 312 is provided with an arc-shaped surface structure 313, the arc-shaped surface structure 313 faces the direction of the inner cavity 107, the distance formed between the first matching groove 111 and the splicing surface 102 is h, and h1 is not less than h3 and not more than (h 1+ h 2); the second tension piece 32 is arranged opposite to the first tension piece 31, the second tension piece 32 is connected with the second matching groove of the lower sand shell 12, and the second tension piece 32 and the first tension piece 31 have the same structure; when the first tension member 31 and the second tension member 32 are locked by the locking member, the swept volume of the fitting portion 312 swinging in the inner cavity 107 is V, and V satisfies the following formula:
equation 2: v is more than or equal to K2 multiplied by V1 and less than or equal to K1 multiplied by V1; wherein, K2 is the lower limit coefficient of cavity change, K1 is the upper limit coefficient of cavity deformation, and V1 is the cavity volume that upper sand shell 11 and lower sand shell 12 splice formed.
In one specific example, the oscillating direction 108 of the engaging portion 312 is as shown in fig. 7. The upper sand shell 11 and the lower sand shell 12 are symmetrically arranged in structure, and the first tensioning member 31 and the second tensioning member 32 are also arranged in the same structure, so that the matching relationship between the second matching groove formed in the lower sand shell 12 and the second tensioning member 32 is the same as the matching relationship between the first matching groove 111 formed in the upper sand shell 11 and the first tensioning member 31. Specifically, in conjunction with the pouring process, after sand filling is completed into the casting mold 100, liquid metal is poured through the pouring gate into the two oppositely disposed mold halves 101 communicating therewith so as to form a rough product. In the above process, the upper sand shell 11 and the lower sand shell 12 can be stably matched through the adjusting assembly 30, so that the two half mold cavities 101 respectively symmetrically arranged are spliced into a complete product mold cavity. Furthermore, after the pouring is completed, the casting mould 100 with the rough product needs to be handled, often with the aid of lifting devices, in combination with its actual size and weight, to be moved to the unmolding area. By combining the technical scheme, the hook assembly of the hoisting device can be respectively matched with the corresponding parts of the first tensioning piece 31 and the second tensioning piece 32 arranged outside the sand box 10, so as to realize stable hoisting of the casting mold 100.
Further, two opposite ends of the upper sand shell 11 are respectively provided with two first matching grooves 111, and the two first matching grooves 111 located on the same end are symmetrically arranged about the center line of the upper sand shell 11, and are opposite to each other, and since the lower sand shell 12 and the upper sand shell 11 have the same structure, the description is omitted here.
In combination with the specific matching relationship between the adjusting assembly 30 and the sand box 10, as is common, the upper sand shell 11 and the lower sand shell 12 are respectively frame-shaped structures with two open ends, and the wall thickness of the frame-shaped structures is thinner, and in combination with the above, in the process of tensioning the first tensioning member 31 and the second tensioning member 32 by the locking members, the first tensioning member 31 is easily caused to perform lever motion in the first matching groove 111, that is, the connecting portion 311 is caused to perform motion in the direction close to the second tensioning member 32 around the supporting portion formed in the first matching groove 111, the matching relationship between the matching portion 312 inside the inner cavity 107 and the corresponding inner side wall 109 of the inner cavity 107 is easily distinguished, when the connecting portion 311 has a tendency to move in the direction close to the second tensioning member 32, the end portion of the matching portion 312 close to the first matching groove 111 abuts against the corresponding inner side wall 109, so that under the tensioning force of the locking members, the matching portion 312 can only swing in the inner cavity 107 to a small extent, so as to avoid the situation that the lifting instability is caused by large swing of the matching portion 312 even the swing in the inner cavity 107, which damages the product.
In a common technical solution, in order to reduce the above-mentioned swing condition, the fastening structure is often inserted into the corresponding structure of the inner cavity 107 to be tightly fitted with the inner sidewall 109, so as to prevent the fastening structure from swinging in the inner cavity 107. Specifically, when the sand burying treatment is performed in the inner cavity 107, the part of the fastening structure extending into the inner cavity 107 is buried therein, so that the fixing and matching effect between the part of the fastening structure and the sand box 10 is further enhanced. However, it is easy to understand that, in the process of pouring the liquid metal into the product mold cavity formed by sand burying, the liquid metal with high temperature needs to be subjected to heat release solidification, that is, the sand around the product mold cavity absorbs heat, but under the action of thermal expansion and cold contraction, the size of the product mold cavity is expanded, so that the overall size of the demoulded rough product is increased, and the demoulding efficiency is reduced.
Then, in combination with the above analysis, in the present technical solution, the fitting portion 312 is configured to swing a certain angle in the inner cavity 107, so that under the tightening action force of the first tightening member 31 and the second tightening member 32 approaching each other, on one hand, the fastening connection between the upper sand shell 11 and the lower sand shell 12 can be realized, and on the other hand, in the process of pouring the liquid metal into the product mold cavity, the first tightening member 31 and the second tightening member 32 are tightened by the locking member, and by using the action of the fitting portion 312 swinging towards the product mold cavity, the thermal expansion direction occurring in the pouring process can be resisted to a certain extent, so as to reduce the risk of the product mold cavity changing the size too much; in addition, more specifically, since the matching portion 312 has the arc-shaped surface structure 313 arranged toward the half mold cavity 101, the amount of sand pushing the sand at the corresponding position to the half mold cavity 101 per unit area is effectively reduced, and the structure of the half mold cavity 101 is prevented from being damaged due to an excessively large extrusion amount caused by partial positions of the half mold cavity 101. Wherein, the swing angle is taken as a.
Furthermore, the structure formed at the corner of the product mold cavity is weaker than other parts, and during the pouring process, the structure at the corner is also the part where stress is concentrated, and is easily deformed greatly under the action of thermal expansion, so that the matching part 312 can correspond to the bottom 211 of the half mold cavity 101 during the swinging process by limiting h3 to be greater than h1, that is, a certain extrusion force can be formed at the corner of the bottom 211 for at least partially offsetting the expansion force.
In one embodiment, it is understood that since hot liquid metal, i.e., hot molten metal, causes the mold half 101 to expand during the casting process, the green part formed in the product mold cavity will also shrink, i.e., cause the product to shrink in size, after the temperature cools. In order to ensure the quality of the demoulded product, corresponding values K1 and K2 can be respectively taken according to the types of rough products formed by corresponding pouring.
Preferably, the upper sand shell 11 and the lower sand shell 12 have the same structure; the inner cavity 107 of the upper sand shell 11 has sand burying slope from the sand filling end 103 to the direction of the splicing surface 102, so that the enclosed cross-sectional area of the upper sand shell 11 is gradually reduced from the sand filling end 103 to the direction of the splicing surface 102; the matching part 312 is provided with a first matching inclined surface and a second matching inclined surface which are used for matching with the corresponding inner side wall 109 of the inner cavity 107, and the first matching inclined surface and the second matching inclined surface are sequentially arranged along the direction of the sand-filling end 103 towards the splicing surface 102; a matching included angle is formed between the first matching inclined plane and the second matching inclined plane; when the second matching inclined plane is attached to the inner side wall 109 corresponding to the inner cavity 107, the connecting portion 311 and the groove bottom 1111 of the first matching groove 111 form an angle with the same size as the matching included angle; when the first tension member 31 and the second tension member 32 are locked by the locking member, the fitting portion 312 swings within the cavity 107 so that the first fitting slope comes into abutment with the corresponding inner side wall 109 of the cavity 107.
In a specific example, by arranging the first and second engaging inclined surfaces, which are disposed at an included angle between the first and second engaging inclined surfaces, of the engaging portion 312, the end surface for abutting against the corresponding inner side wall 109 can be stably engaged with the inner side wall 109 under the tensioning force, that is, the engaging portion 312 can be switched between two positions. Specifically, in the process of installing the fitting portion 312 to the upper sand shell 11, the inner sidewall 109 of the upper sand shell 11 is combined to have a sand burying slope, so that the second fitting surface is tightly attached to the inner sidewall 109, and thus, in the sand burying process, the fitting portion 312 is in a state of being tightly attached to the inner sidewall 109 by the second fitting surface, and when the first tensioning member 31 and the second tensioning member 32 are tensioned, the second fitting surface is changed into a state of being tightly attached to the first fitting surface and the inner sidewall 109, and at this time, the corresponding position of the connecting portion 311 is completely attached to the bottom surface 1111 of the first fitting groove 111, so that in the subsequent process of hoisting the casting mold 100, the contact area between the connecting portion 311 and the first fitting groove 111 is prevented from being too small, and even the matching relationship between the wire and the wire is formed, so that the shearing force applied to the connecting portion 311 is too large to easily cause damage, and safety accidents are easily caused in the hoisting process.
Further, the connecting portion 311 is an elongated rod, and the elongated rod is fixedly connected to one side of the matching portion 312 close to the inner cavity 107 through the corresponding first matching groove 111; the matching part 312 is a spherical shell structure or a cylindrical shell structure, a first circle center corresponding to the matching part 312 is O1, a second circle center where the connecting part 311 drives the matching part 312 to swing in the inner cavity 107 is O2, and a connecting line of the first circle center and the second circle center is coplanar with a motion track of the connecting part 311 in the corresponding first matching groove 111; one end of the matching portion 312 away from the splicing surface 102 is a first pressing end 3121, and one end of the matching portion 312 close to the splicing surface 102 is a second pressing end 3122; in a direction from the first pressing end 3121 to the second pressing end 3122, the cross-sectional area surrounded by the fitting portion 312 increases first and then decreases.
On the basis of the above specific example, in the specific example, since the connection between the first circle center and the second circle center is coplanar with the movement track of the connection portion 311 in the corresponding first matching groove 111, and the first circle center is located at one side of the second circle center away from the half mold cavity 101, under the action of tensioning the first tensioning member 31 and the second tensioning member 32, the second extrusion end 3122 can move toward the direction close to the corresponding half mold cavity 101, so that extrusion force to the half mold cavity 101 is provided for sand located therebetween, so that the expansion acting force of the half mold cavity 101 caused in the process of pouring hot metal liquid is resisted to a certain extent, and the deformation amount of the half mold cavity 101 is ensured to be within a set range.
Preferably, the cavity template 20 is provided with a cavity housing 21 for forming the half mold cavity 101, and when the cavity template 20 is connected to the mating end 104 of the upper sand shell 11 far away from the sand-filling end 103, a first distance arranged along the transverse direction is formed between the mating part 312 and the cavity housing 21; the adjustment assembly 30 includes: a guide slope structure provided at the first pressing end 3121 and/or the first pressing end 3121, and the guide slope structure is located at a side of the first pressing end 3121 and/or the first pressing end 3121 away from the connection portion 311; wherein, the area of the corresponding matching part 312 swinging in the cavity 107 is overlapped with the cavity shell 21 in the transverse direction; and the partial overlap includes at least the position of the bottom 211 of the corresponding cavity housing 21 away from its opening. When the first tension member 31 and the second tension member 32 are locked by the locking member, the second pressing end 3122 moves toward the cavity housing 21, and the first pressing end 3121 moves away from the cavity housing 21, and the connecting rod is attached to the bottom surface 1111 of the first fitting groove 111.
Preferably, the position of the sand box 10 corresponding to the adjusting assembly 30 is provided with a positioning projection; the adjusting assembly 30 is provided with a first mounting waist-shaped groove 34, the first mounting waist-shaped groove 34 is arranged on the first tensioning member 31 and the second tensioning member 32, and the first mounting waist-shaped groove 34 is used for being matched with the locking member; the casting mold 100 further includes: the transverse correcting component 40 is in threaded connection with the first tensioning piece 31 and the second tensioning piece 32, and the transverse correcting component 40 is matched with the corresponding positioning protrusions; an angle reader 50, the angle reader 50 being connected to the flask 10 at a position corresponding to the adjustment assembly 30, and the angle reader 50 being for measuring an angle between the outer side wall 105 of the flask 10 provided with the adjustment assembly 30 and the adjustment assembly 30; wherein the angle formed between the outer sidewall 105 and the adjustment assembly 30 changes as the engagement portion 312 of the first tension member 31 and/or the engagement portion 312 of the second tension member 32 swings within the interior cavity 107.
Specifically, the fitting portion 312 can be ensured to be tightly attached to the inner side wall 109 through the transverse tensioning action of the transverse straightening component 40, specifically, the first fitting surface or the second fitting surface of the fitting portion 312 can be stably fitted with the corresponding inner side wall 109, so that the fitting between the fitting portion 312 and the inner side wall 109 is not stable when the fitting portion 312 is mounted in the inner cavity 107, for example, a large fitting gap is formed between the fitting portion 312 and the inner side wall 109, and on one hand, the swept volume formed by the swinging of the fitting portion 312 is not ensured, and further, the extrusion amount formed by the extrusion force of the half-and-half mold cavity 101 cannot be accurately obtained; on the other hand, the lengths of the connecting portion 311 of the first tensioning member 31 and the connecting portion 311 of the second tensioning member 32 extending out of the sand box 10 are easy to keep, so that stable hoisting is not facilitated, the casting mold 100 cannot be kept in a relatively stable state during hoisting, specifically, the casting mold 100 is easy to hoist in an inclined state, and accordingly, the performance of a crude product arranged in a cavity of the product mold is influenced, and especially, the crude product is still in an incompletely-shaped state at the moment.
Preferably, the positioning protrusion is a positioning cylinder 112; the position that adjusting part 30 corresponds location cylinder 112 is equipped with connecting plate 33, and connecting plate 33 is equipped with the screw, and horizontal correction subassembly 40 includes: the correcting screw rod 41 is in threaded connection with the corresponding screw hole through a second waist-shaped hole; the positioning plate 42 is fixedly connected with the correcting screw rod 41, and the positioning plate 42 is positioned on one side, close to the sand box 10, of the connecting plate 33; one end of the spring piece 43 is sleeved on the correcting screw rod 41, the other end of the spring piece 43 is sleeved on the corresponding positioning column 112, and the spring piece 43 is clamped between the positioning plate 42 and the sand box 10; wherein adjusting the leveling screw 41 moves the positioning plate 42 toward or away from the corresponding positioning cylinder 112 to deform the spring member 43 provided therein.
Preferably, the mold flask 10 is provided with a mating end 104 disposed opposite the sand-filled end 103, and the cavity plate 20 is mounted to the mating end 104; a plurality of pre-buried holes are formed along the circumferential position of the mating end 104, and a plurality of connecting holes matched with the plurality of pre-buried holes are formed in the cavity template 20; the casting mold 100 includes: and the guide rod assembly is inserted into the plurality of pre-buried holes and the plurality of connecting holes correspondingly.
The second embodiment:
referring to fig. 8, it is a schematic flow chart of a casting production process provided in this embodiment. The casting production process is applied to the casting mold 100 as in the above-described first embodiment; with reference to fig. 1-7, the casting process specifically includes:
step S1, placing a cavity template 20 on a horizontal plane, and enabling the side face, provided with a cavity shell 21, of the cavity template 20 to face upwards; wherein, the side surface of the cavity template 20 correspondingly provided with the cavity shell 21 is provided with a limit clamping groove which is arranged around the circumference of the cavity shell 21;
s2, adjusting the position of the upper sand shell 11 relative to the cavity shell 21 so that the upper sand shell 11 is clamped into the limiting clamping groove; the cavity housing 21 comprises a cavity body and a first pouring channel 106 communicated with the cavity body;
step S3, mounting the first tensioning member 31 to the first fitting groove 111 so that the fitting portion 312 is fitted to the inner sidewall 109 corresponding to the upper shell 11;
s4, filling sand into the sand filling end 103 so as to fill the inner cavity with the sand;
s5, finishing sand to enable the sand to be flush with the end face where the sand filling end 103 is located, covering the sealing plate on the sand filling end 103, and then inverting the upper sand shell 11 and the cavity mold to enable the cavity mold to be located above the upper sand shell 11 in the vertical direction;
step S6, taking down the cavity template 20 from the upper sand shell 11 so as to form a corresponding half mold cavity 101 in the upper sand shell 11;
step S7, matching the cavity template 20 with the lower sand shell 12, installing the second tensioning piece 32 into a second matching groove, filling sand into the inner cavity of the lower sand shell 12, and taking down the cavity template 20 from the lower sand shell 12 to obtain another corresponding half mold cavity 101;
step S8, splicing the obtained lower sand shell 12 with the half mold cavities 101 to the upper sand shell 11 to form a complete cavity consisting of the two half mold cavities 101;
and S9, connecting the locking member with the first tensioning member 31 and the second tensioning member 32 to fix the upper sand shell 11 and the lower sand shell 12, and pouring liquid into the pouring channel 106 communicated with the complete cavity to obtain a crude product.
Preferably, the crude product is a buffer; dressing the sand so that the tool is flush with the end face where the sand pack end 103 is located comprises:
step S51, weighing the upper sand shell 11 with the cavity template 20 and filled with sand to obtain a first weight;
step S52, comparing the calculated first weight with a corresponding standard weight;
step S53, if the weight difference value between the first weight and the standard weight is within the error range;
in step S54, after the sealing plate is covered on the sand filling end 103, the upper sand shell 11 and the cavity mold are turned upside down, so that the cavity mold is located above the upper sand shell 11 in the vertical direction.
Step S9 specifically includes:
step S91, locking the upper sand shell 11 and the lower sand shell 12 through locking pieces;
step S92, measuring an included angle formed between the adjusting component 30 and the corresponding outer side wall 105 of the sand box 10, and judging whether the included angle and the swinging angle of the matching part 312 in the inner cavity meet pouring conditions;
step S921, if yes, pouring liquid into a pouring channel 106 communicated with the complete cavity to obtain a crude product;
in step S922, if not, the position of the adjusting assembly 30 relative to the sand box 10 is adjusted until the included angle and the angle of the matching portion 312 swinging in the inner cavity satisfy the pouring condition.
Specifically, this embodiment can achieve the technical effect corresponding to any one of the technical solutions in the first embodiment, and details are not described here.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Claims (10)
1. A casting mould with an adjusting function comprises a sand box and a cavity template, wherein the sand box comprises an upper sand shell and a lower sand shell which are mutually spliced, and the splicing plane of the upper sand shell and the lower sand shell is a splicing plane; the casting mold is used for matching with any one of the upper sand shell and the lower sand shell so as to form a half mold cavity through sand filling; the sand filling device is characterized in that the sand filling height at which the upper sand shell correspondingly forms the half mould cavity is h1, one end of the upper sand shell, which is far away from the opening of the half mould cavity, is a sand filling end, and the distance between the end surface at which the sand filling end is located and the bottom of the corresponding half mould cavity is h2; wherein h1 and h2 satisfy the following relation of formula 1: equation 1: h1 is more than h2 and less than or equal to 2/3 (h 1+ h 2);
the casting mold further comprises an adjustment assembly for tensioning the upper sand shell and the lower sand shell, the adjustment assembly comprising:
the first tensioning piece is connected to the first matching groove of the upper sand shell and provided with a connecting part and a matching part, the connecting part extends out of the upper sand shell through the first matching groove, and the matching part is abutted to the inner cavity of the upper sand shell; the matching part is provided with an arc-shaped surface structure, the arc-shaped surface structure faces the inner cavity, the distance between the first matching groove and the splicing surface is h3, and h1 is not less than h3 and not more than (h 1+ h 2);
the second tensioning piece is arranged opposite to the first tensioning piece, is connected to the second matching groove of the lower sand shell and has the same structure as the first tensioning piece;
when the locking part locks the first tensioning piece and the second tensioning piece, the swept volume of the matching part swinging in the inner cavity is V, and then the V meets the following formula 2:
equation 2: v is more than or equal to K2 multiplied by V1 and less than or equal to K1 multiplied by V1; k2 is a cavity change lower limit coefficient, K1 is a cavity deformation upper limit coefficient, and V1 is a cavity volume formed by splicing the upper sand shell and the lower sand shell.
2. The casting mold according to claim 1, wherein the upper shell and the lower shell are identical in structure;
the inner cavity of the upper sand shell is provided with a sand burying slope from the sand filling end to the direction of the splicing surface, so that the area of the enclosed cross section of the upper sand shell is gradually reduced from the sand filling end to the direction of the splicing surface;
the matching part is provided with a first matching inclined surface and a second matching inclined surface which are used for matching with the corresponding inner side wall of the inner cavity, and the first matching inclined surface and the second matching inclined surface are sequentially arranged along the direction of the sand filling end towards the splicing surface; a matching included angle is formed between the first matching inclined surface and the second matching inclined surface;
when the second matching inclined plane is attached to the corresponding inner side wall of the inner cavity, the connecting part and the groove bottom surface of the first matching groove form an angle with the same size as the matching included angle; when the first tension piece and the second tension piece are locked through the locking piece, the matching part swings in the inner cavity so that the first matching inclined surface is attached to the inner side wall.
3. Casting mold according to claim 1 or 2,
the connecting part is a long-strip-shaped rod piece, and the long-strip-shaped rod piece is fixedly connected with one side, close to the inner cavity, of the matching part through the corresponding first matching groove;
the matching part is of a spherical shell structure or a cylindrical shell structure, a first circle center corresponding to the matching part is O1, a second circle center for driving the matching part to swing in the inner cavity by the connecting part is O2, and a connecting line of the first circle center and the second circle center is coplanar with a motion track of the connecting part in the corresponding first matching groove;
one end of the matching part, which is far away from the splicing surface, is a first extrusion end, and one end of the matching part, which is close to the splicing surface, is a second extrusion end; from the first extrusion end point to in the direction of second extrusion end, the cross sectional area that cooperation portion encloses is increased earlier then is reduced.
4. A casting mould according to claim 3, wherein the cavity mould plate is provided with a cavity housing for forming the cavity of the half mould, the mating portion forming a first distance in a transverse direction with the cavity housing when the cavity mould plate is attached to the mating end of the cope flask remote from the sand-filled end; the adjustment assembly includes:
the guide inclined surface structure is arranged at the first extrusion end and/or the first extrusion end and is positioned at one side of the first extrusion end and/or the first extrusion end, which is far away from the connecting part; the area corresponding to the swing of the matching part in the inner cavity is partially overlapped with the cavity shell in the transverse direction; and the partial superposition at least comprises a bottom position which is corresponding to the cavity shell and is far away from the opening of the cavity shell;
when the first tensioning piece and the second tensioning piece are locked through the locking piece, the second extrusion end moves towards the direction close to the cavity shell, the first extrusion end moves towards the direction far away from the cavity shell, and the connecting rod is attached to the bottom surface of the first matching groove.
5. The casting mold according to claim 3, wherein the flask is provided with a positioning projection corresponding to a position of the adjustment assembly; the adjusting assembly is provided with a first installation waist-shaped groove, the first installation waist-shaped groove is formed in the first tensioning piece and the second tensioning piece, and the first installation waist-shaped groove is used for being matched with the locking piece; the casting mold further includes:
the transverse correcting component is in threaded connection with the first tensioning piece and the second tensioning piece and is matched with the corresponding positioning protrusion;
the angle reader is connected to the position, corresponding to the adjusting assembly, of the sand box and is used for measuring the angle between the outer side wall, provided with the adjusting assembly, of the sand box and the adjusting assembly;
wherein an angle formed between the lateral side wall and the adjustment assembly changes as the engagement portion of the first tension member and/or the engagement portion of the second tension member swings within the lumen.
6. The casting mold according to claim 5,
the positioning bulge is a positioning cylinder; the adjusting component is provided with a connecting plate corresponding to the position of the positioning cylinder, and the connecting plate is provided with a screw hole; the lateral orthotic assembly comprising:
the correcting screw is in threaded connection with the corresponding screw hole;
the positioning plate is fixedly connected with the correcting screw rod and is positioned on one side, close to the sand box, of the connecting plate;
one end of the spring part is sleeved on the correcting screw rod, the other end of the spring part is sleeved on the corresponding positioning cylinder, and the spring part is clamped between the positioning plate and the sand box;
the correcting screw rod is adjusted to enable the positioning plate to move towards the direction close to or far away from the corresponding positioning cylinder, so that the spring piece arranged in the positioning cylinder deforms.
7. The casting mold according to claim 1,
the sand box is provided with a matching end opposite to the sand filling end, and the cavity template is installed at the matching end; a plurality of pre-buried holes are formed in the circumferential position of the matching end, and a plurality of connecting holes matched with the pre-buried holes are formed in the cavity template; the casting mold includes:
and the guide rod assembly is inserted into the plurality of pre-buried holes and the plurality of connecting holes correspondingly.
8. A foundry production process, characterized in that it is applied to a foundry mould according to any one of the preceding claims 1 to 7; the casting production process comprises the following steps:
s1, placing the cavity template on a horizontal plane, and enabling the side face of the cavity template, which is provided with a cavity shell, to be upward; the side face, corresponding to the cavity shell, of the cavity template is provided with a limiting clamping groove, and the limiting clamping groove is arranged around the circumference of the cavity shell;
s2, adjusting the position of the upper sand shell relative to the cavity shell so that the upper sand shell is clamped into the limiting clamping groove; the die cavity shell comprises a die cavity body and a first pouring channel communicated with the die cavity body;
s3, mounting the first tensioning piece to the first matching groove so that the matching part is attached to the inner side wall corresponding to the upper sand shell;
s4, filling sand into the sand filling end to fill the inner cavity with the sand;
s5, finishing the sand to enable the sand to be flush with the end face where the sand filling end is located, covering a sealing plate on the sand filling end, and then inverting the upper sand shell and the cavity mold to enable the cavity mold to be located above the upper sand shell in the vertical direction;
s6, taking down the cavity template from the upper sand shell so as to form a corresponding half mold cavity in the upper sand shell;
step S7, matching the cavity template with the lower sand shell, installing the second tensioning piece into the second matching groove, filling sand into the inner cavity of the lower sand shell, and taking down the cavity template from the lower sand shell to obtain another corresponding half mold cavity;
s8, splicing the obtained lower sand shell with the half mold cavities to the upper sand shell to form a complete cavity consisting of the two half mold cavities;
and S9, connecting the locking piece with the first tensioning piece and the second tensioning piece to fix the upper sand shell and the lower sand shell, and pouring liquid into a pouring channel communicated with the complete cavity to obtain a crude product.
9. The foundry production process of claim 8, wherein the green article is a bumper; the dressing the sand so that the sand pack is flush with the end face where the sand-packed end is located comprises:
step S51, weighing the upper sand shell with the cavity template and the sand filled in to obtain a first weight;
step S52, comparing the first weight obtained by calculation with a corresponding standard weight;
step S53, if the weight difference value between the first weight and the standard weight is within an error range;
and step S54, after the sealing plate is covered on the sand filling end, inverting the upper sand shell and the cavity mold to enable the cavity mold to be located above the upper sand shell in the vertical direction.
10. The foundry production process according to claim 9, characterized in that the step S9 comprises in particular:
step S91, locking the upper sand shell and the lower sand shell through the locking piece;
step S92, measuring an included angle formed between the adjusting component and the corresponding outer side wall of the sand box, and judging whether the included angle and the angle of the matching part swinging in the inner cavity meet pouring conditions or not;
step S921, if yes, pouring a pouring liquid through a pouring channel communicated with the complete cavity to obtain a crude product;
and step S922, if not, adjusting the position of the adjusting component relative to the sand box until the included angle and the swinging angle of the matching part in the inner cavity meet the pouring condition.
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| GB358697A (en) * | 1930-09-19 | 1931-10-15 | Abraham Martinius Erichsen | Improvements in moulds for casting metals and metal alloys |
| US20180009177A1 (en) * | 2016-07-05 | 2018-01-11 | Senvion Gmbh | Production mold for a rotor blade |
| CN108339944A (en) * | 2018-04-27 | 2018-07-31 | 遵义江星机械模具有限公司 | For the molding casting mould of water pump vane |
| CN109175245A (en) * | 2018-10-25 | 2019-01-11 | 芜湖泓鹄材料技术有限公司 | The casting technique of Auto panel dies casting |
| CN114210923A (en) * | 2021-12-07 | 2022-03-22 | 青岛连山铸造有限公司 | Novel coupler mold integrating coupler body and coupler knuckle and using method thereof |
| CN114226647A (en) * | 2021-12-01 | 2022-03-25 | 宁波金汇精密铸造有限公司 | Casting device and sand box |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB358697A (en) * | 1930-09-19 | 1931-10-15 | Abraham Martinius Erichsen | Improvements in moulds for casting metals and metal alloys |
| US20180009177A1 (en) * | 2016-07-05 | 2018-01-11 | Senvion Gmbh | Production mold for a rotor blade |
| CN108339944A (en) * | 2018-04-27 | 2018-07-31 | 遵义江星机械模具有限公司 | For the molding casting mould of water pump vane |
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| CN114226647A (en) * | 2021-12-01 | 2022-03-25 | 宁波金汇精密铸造有限公司 | Casting device and sand box |
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Denomination of invention: A casting mold and casting production process with adjustment function Effective date of registration: 20230927 Granted publication date: 20230623 Pledgee: Industrial and Commercial Bank of China Limited Xiangshan sub branch Pledgor: NINGBO JINHUI PRECISION CASTING Co.,Ltd. Registration number: Y2023980059234 |