CN115700153B - 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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- CN115700153B CN115700153B CN202211592320.1A CN202211592320A CN115700153B CN 115700153 B CN115700153 B CN 115700153B CN 202211592320 A CN202211592320 A CN 202211592320A CN 115700153 B CN115700153 B CN 115700153B
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Abstract
The invention provides a casting mold with an adjusting function and a casting production process, wherein the casting mold comprises a sand box and a cavity template, the sand box comprises an upper sand shell and a lower sand shell which are mutually spliced, and the plane where the two shells are spliced 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 sand filling height at which a sand box corresponds to the half mold cavity is formed is h1, one end of the sand box, which is far away from an opening of the half mold cavity, is a sand filling end, and the distance between the end face at which the sand filling end is located and the corresponding half mold cavity is h2; wherein, h1 and h2 satisfy the following relationship of formula 1: equation 1: h2 is more than h1 and less than or equal to 2/3 (h1+h2). The invention solves the technical problem that the qualification rate of the demolding is reduced due to the fact that the connecting position between the adjusting component for fixing the mutually spliced sand shells and the sand shells is improper.
Description
Technical Field
The invention relates to the technical field of casting, in particular to a casting mold with an adjusting function and a casting production process.
Background
Casting is a process in which liquid metal is cast into a casting cavity that conforms to the shape of the part, and after it has cooled to solidify, the part or blank is obtained. The casting material is mostly metal which is originally solid but heated to liquid state, and the casting mould material can be sand, metal or even ceramic.
However, there are at least one of the following technical problems in the related art: the improper connection position between the adjusting assembly for fixing the mutually spliced sand shells and the sand shells leads to the problem of reducing the qualification rate of the demolding.
Disclosure of Invention
The invention solves the technical problem that the qualification rate of the demolding is reduced due to the fact that the connecting position between the adjusting component for fixing the mutually spliced sand shells and the sand shells is improper.
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 mutually spliced, and the splicing plane of the upper sand shell and the lower sand shell is a splicing surface; the casting mold is used for being matched with any one of an upper sand shell and a lower sand shell so as to form a half mold cavity through sand filling, the sand filling height of the upper sand shell where the half mold cavity is correspondingly formed is h1, one end of the upper sand shell, which is far away from an opening of the half mold cavity, is a sand filling end, and the distance between the end face of the sand filling end and the bottom of the corresponding half mold cavity is h2; wherein, h1 and h2 satisfy the following relationship of formula 1: equation 1: h2 is more than h1 and less than or equal to 2/3 (h1+h2); the casting mold further includes an adjustment assembly for tensioning the upper sand shell and the lower sand shell, the adjustment assembly including: the first tensioning piece is connected to the first matching groove of the upper sand shell, the first tensioning piece is 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 in butt joint with the inner cavity of the upper sand shell; the matching part is provided with an arc-shaped surface structure, the arc-shaped surface structure is arranged towards the direction of the inner cavity, the distance formed between the first matching groove and the splicing surface is h3, and h1 is less than or equal to h3 and less than or equal to (h1+h2); the second tensioning piece is arranged opposite to the first tensioning piece and is connected to the second matching groove of the lower sand shell, and the second tensioning piece and the first tensioning piece are identical in structure; when the locking piece locks the first tensioning piece and the second tensioning piece, the volume swept by the matching part (312) in the inner cavity in a swinging way is V, and the V meets the following formula 2: equation 2: K2×V1 is not less than V and not more than K1×V1; wherein, K2 is the lower limit coefficient of cavity variation, K1 is the upper limit coefficient of cavity deformation, and V1 is the cavity volume formed by splicing the upper sand shell and the lower sand shell.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: specifically, this technical scheme is through rationally setting up the hookup location between adjusting part and the sand box to avoid stretching into the too near or too far distance between cooperation portion and the die cavity template of inner chamber and reduce the qualification rate of demolding. In combination with the actual pouring process, if h2 is too large, excessive heat is taken away by sand corresponding to h2 in the pouring liquid cooling process in the cavity of the half mould, so that the whole demolding is too small due to the excessively large cooling rate of demolding; if h1 is too large, the mold stripping will be too large due to thermal expansion, so that the opened cavity is too large, and even if the cavity is opened and crumpled, the shape of the product to be ejected will be changed in addition to the increase in the size.
In one example of the present invention, the upper sand shell is the same structure as the lower sand shell; the inner cavity of the upper sand shell is provided with sand burying inclination in the direction from the sand filling end to the splicing surface, so that the cross section area surrounded by the upper sand shell is gradually reduced in the direction from the sand filling end to 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 bottom surface of the first matching groove form an angle with the same size as the matching included angle; when the first tensioning piece and the second tensioning 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.
In one example of the invention, the connecting part is a strip rod, and the strip rod is fixedly connected with one side of the matching part, which is close to the inner cavity, through a 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 and a movement track of the connecting part in the corresponding first matching groove are arranged in a coplanar manner; 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; the cross-sectional area enclosed by the matching part is increased and then decreased in the direction from the first extrusion end to the second extrusion end.
In one example of the invention, a cavity template is provided with a cavity shell for forming a half-mold cavity, and when the cavity template is connected to a matched end of the upper sand shell, which is far away from the sand filling end, a first distance is formed between the matched part and the cavity shell along the transverse direction; the adjusting assembly includes: the guide inclined surface structure is arranged at the first extrusion end and is positioned at one side of the first extrusion end far away from the connecting part; the swinging area of the corresponding matching part in the inner 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 example of the invention, the sand box is provided with a positioning bulge corresponding to the position of the adjusting component; the adjusting component is provided with a first mounting waist-shaped groove which is arranged on the first tensioning piece and the second tensioning piece and 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 bulge; the angle reader is connected to the position of the sand box corresponding to the adjusting assembly and is used for measuring the angle between the outer side wall of the sand box, provided with the adjusting assembly, and the adjusting assembly; wherein, when the mating portion of the first tensioning member and/or the mating portion of the second tensioning member swings within the inner cavity, the angle formed between the outer sidewall and the adjustment assembly changes.
In one example of the invention, the positioning protrusion is a positioning cylinder; the adjusting component is provided with a connecting plate at the position corresponding to the positioning cylinder, and the connecting plate is provided with a screw hole; the lateral correction assembly includes: the correction screw rod is in threaded connection with the corresponding screw hole; the positioning plate is fixedly connected with the correction screw rod and is positioned at one side of the connecting plate, which is close to the sand box; one end of the spring piece is sleeved on the correction screw rod, the other end of the spring piece is sleeved on the corresponding positioning cylinder, and the spring piece is clamped between the positioning plate and the sand box; the adjusting and correcting screw rod enables the locating plate to move towards the direction close to or far away from the corresponding locating cylinder, so that the spring piece arranged in the locating plate is deformed.
In one example of the present invention, the flask is provided with a mating end disposed opposite the sand filling end, and the cavity matchplate is mounted to the mating end; a plurality of embedded holes are formed along the circumference of the matching end, and a plurality of connecting holes matched with the embedded holes are formed in the cavity template; the casting mold includes: the guide rod assembly is inserted with the embedded holes and the connecting holes correspondingly.
In another aspect, the present invention also provides a casting production process applied to the casting mold of any one of the above examples; the casting production process comprises the following steps: step S1, placing a cavity template on a horizontal plane, and enabling the side surface of the cavity template with a cavity shell to face upwards; the side surface of the cavity template, which is correspondingly provided with the cavity shell, is provided with a limit clamping groove, and the limit 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 as to enable the upper sand shell to be 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; step S4, filling sand into the sand filling end so that the inner cavity is filled with the sand; s5, trimming 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 inverting the upper sand shell and the cavity template so that the cavity template is located above the upper sand shell in the vertical direction; step S6, removing 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 the second matching groove, filling sand into the inner cavity of the lower sand shell, and removing the cavity template from the lower sand shell to obtain a corresponding other half mold cavity; step S8, splicing the obtained lower sand shell with the half-mold cavity to the upper sand shell to form a complete cavity consisting of 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 through a pouring channel communicated with the complete cavity to obtain a coarse product.
Compared with the prior art, the technical effect achieved by adopting the technical scheme is as follows: the technical effects corresponding to the technical solutions in any of the foregoing examples can be achieved, and are not repeated here.
In one example of the invention, the coarse product is a buffer; finishing the sand to be flush with the end face where the sand filling end is located includes: step 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 the corresponding standard weight; step S53, if the weight difference between the first weight and the standard weight falls within the error range; and S54, after the sealing plate is covered on the sand filling end, the upper sand shell and the cavity template are inverted, so that the cavity template is positioned above the upper sand shell in the vertical direction.
In one example 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 swinging angle of the matching part in the inner cavity meet pouring conditions or not; step S921, if the requirements are met, casting liquid is cast through a casting channel communicated with the complete cavity, so that a crude product is obtained; step S922, if not, the position of the adjusting component relative to the sand box is adjusted 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, through rationally setting up the hookup location between adjusting part and the sand box to avoid stretching into the too near or too far distance between cooperation portion and the die cavity template of inner chamber and reduce the qualification rate of demolding. In combination with the actual pouring process, if h2 is too large, excessive heat is taken away by sand corresponding to h2 in the pouring liquid cooling process in the cavity of the half mould, so that the whole demolding is too small due to the excessively large cooling rate of demolding; if h1 is too large, the mold stripping will be too large due to thermal expansion, so that the opened cavity is too large, and even if the cavity is opened and crumpled, the shape of the product to be ejected will be changed in addition to the increase in the size.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art;
fig. 1 is a schematic structural view of a casting mold according to a first 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 diagram of the mating relationship of the cavity mold plate, the upper sand shell and the first locking member;
FIG. 4 is a schematic diagram of the mating relationship of the mating assembly and the upper shell;
FIG. 5 is an enlarged view of FIG. 4 at A;
FIG. 6 is a schematic illustration of the engagement of the first tension member with the inner sidewall, the first engagement slot;
FIG. 7 is a schematic illustration of the engagement of the first tensioning member with the mold 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 invention.
Reference numerals illustrate:
100-casting a mold; 10-sand box; 101-a half mold cavity; 102-splicing surfaces; 103-filling sand; 104-a mating end; 105-an outer sidewall; 106-pouring channels; 107-lumen; 108-swinging direction; 109-inner side wall; 11-sand coating; 111-a first mating groove; 1111—a tank floor; 112-positioning a cylinder; 12-sand shell discharging; 20-a cavity template; 21-a cavity housing; 211-bottom; 30-an adjustment assembly; 31-a first tensioning member; 311-connecting part; 312-mating portion; 3121—a first extrusion end; 3122-a second extrusion end; 313-arced face structure; 32-a second tensioning member; 33-connecting plates; 34-a first mounting waist-shaped groove; 40-a lateral correction assembly; 41-correcting the screw; 42-positioning plates; 43-spring member; 50-angle reader.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Embodiment one:
referring to fig. 1, a schematic structure of a casting mold 100 with an adjusting function according to the first embodiment is shown. Referring to fig. 2 to 7, the casting mold 100 includes a flask 10 and a cavity plate 20, the flask 10 includes an upper shell 11 and a lower shell 12 that are spliced with each other, and a plane where the two shells are spliced is a splicing surface 102; the casting mold 100 is for cooperation with either one of the cope shell 11 and the drag shell 12 such that a half mold cavity 101 is formed by sand filling; the sand filling height of the sand feeding shell 11 corresponding to the half mold cavity 101 is h1, the sand filling end 103 is arranged at one end of the sand feeding shell 11 far away from the opening of the half mold cavity 101, and the distance between the end face of the sand filling end 103 and the corresponding half mold cavity 101 is h2; wherein, h1 and h2 satisfy the relationship of the following formula: equation 1: h2 is more than h1 and less than or equal to 2/3 (h1+h2).
The casting mold 100 further includes an adjustment assembly 30 for tightening the upper shell 11 and the lower shell 12, the adjustment assembly 30 including a first tightening member 31, a second tightening member 32, and a locking member. The first tensioning piece 31 is connected to the first matching groove 111 of the upper sand shell 11, the first tensioning piece 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 with 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 is arranged towards the direction of the inner cavity 107, the distance formed between the first matching groove 111 and the splicing surface 102 is h3, and h1 is less than or equal to h3 and less than or equal to (h1+h2); the second tensioning piece 32 is arranged opposite to the first tensioning piece 31, the second tensioning piece 32 is connected to the second matching groove of the lower sand shell 12, and the second tensioning piece 32 has the same structure as the first tensioning piece 31; when the first tension member 31 and the second tension member 32 are locked by the locking member, the volume swept by the engagement portion 312 when swinging in the inner chamber 107 is V, and V satisfies the following formula:
equation 2: K2×V1 is not less than V and not more than K1×V1; wherein, K2 is the lower limit coefficient of cavity variation, K1 is the upper limit coefficient of cavity deformation, and V1 is the cavity volume formed by splicing the upper sand shell 11 and the lower sand shell 12.
In one embodiment, the swing direction 108 of the mating portion 312 is shown in fig. 7. The upper shell 11 and the lower shell 12 are symmetrically arranged, and the first tension member 31 and the second tension member 32 are also arranged in the same structure, so that the mating relationship of the second mating groove formed on the lower shell 12 and the second tension member 32 is also the same as the mating relationship of the first mating groove 111 formed on the upper shell 11 and the first tension member 31. Specifically, in connection with the casting process, after sand filling of the casting mold 100 is completed, liquid metal is poured through a pouring gate into two oppositely disposed mold half cavities 101 in communication 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 which are respectively and symmetrically arranged are spliced into a complete product mold cavity. Furthermore, after the casting is completed, the casting mold 100 with the blank is handled, and, in combination with its actual size and weight, it is often moved to the stripping area by means of a lifting device. In combination with the technical scheme, the hook assemblies of the lifting device can be respectively matched with the corresponding parts of the first tensioning piece 31 and the second tensioning piece 32 which are arranged outside the sand box 10, so that stable lifting of the casting mold 100 is realized.
Further, two first matching grooves 111 are respectively provided at two opposite side ends of the upper sand shell 11, and the two first matching grooves 111 located at the same side end are symmetrically disposed about a center line of the upper sand shell 11, and are opposite, and the lower sand shell 12 and the upper sand shell 11 have the same structure, which is not repeated herein.
In combination with the specific matching relationship between the adjusting assembly 30 and the sand box 10, it is common that the upper sand shell 11 and the lower sand shell 12 are respectively frame structures with two open ends, and the wall thickness of the frame structures is thinner, and in combination with the above, in the process of tightening the first tightening piece 31 and the second tightening piece 32 by the locking piece, the first tightening piece 31 is easily made to perform lever movement in the first matching groove 111, that is, the connecting portion 311 is made to perform movement in the direction close to the second tightening piece 32 around the supporting portion formed in the first matching groove 111, the matching relationship between the inner cavity 107 and the corresponding inner side wall 109 of the inner cavity 107 is combined with the matching portion 312, and when the connecting portion 311 has a tendency to move in the direction close to the second tightening piece 32, the end portion close to the first matching groove 111 by the matching portion 312 abuts against the corresponding inner side wall 109, so that under the action of the tightening force of the locking piece, the matching portion 312 can only perform small-amplitude swing in the inner cavity 107, thereby avoiding the occurrence of unstable condition caused by large-amplitude swing in the inner cavity 107, even causing damage to the product mold caused by the excessive swing amplitude in the inner cavity 107.
In a conventional solution, to reduce the above-mentioned swinging situation, the corresponding structure of the fastening structure extending into the inner cavity 107 is often in clamping engagement with the inner sidewall 109, so as to avoid the fastening structure from swinging in the inner cavity 107. Specifically, when sand burying is performed into 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 liquid metal into the product mold cavity formed by sand burying, since the liquid metal with high temperature needs to be solidified through heat release, that is, the heat is absorbed by the surrounding sand forming the product mold cavity, the size of the product mold cavity is enlarged under the action of expansion caused by heat and contraction caused by cold, so that the overall size of the coarse product of the demolding is increased, and the demolding efficiency is reduced.
Thus, in combination with the above analysis, in the present solution, since the engaging portion 312 is configured to swing in the inner cavity 107 by a certain angle, so that under the tightening 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 shell 11 and the lower shell 12 can be achieved, and on the other hand, during 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 utilizing the swinging effect of the engaging portion 312 toward the product mold cavity, the thermal expansion direction occurring during the pouring process can be resisted to a certain extent, thereby reducing the risk of excessive dimensional change of the product mold cavity; in addition, more specifically, since the matching portion 312 has the arc-shaped surface structure 313 disposed toward the half mold cavity 101, the amount of sand pushing the sand at the corresponding position in a unit area toward the half mold cavity 101 is effectively reduced, and the damage to the structure due to the excessive extrusion caused to the partial position of the half mold cavity 101 is avoided. Wherein, the swinging angle is a.
Further, the structure formed at the corner of the product mold cavity is weaker than other parts, and in the casting process, the structure at the corner is a stress concentration part and is easy to deform greatly under the thermal expansion force, so that the matching part 312 can correspond to the bottom 211 of the mold half cavity 101 in the swinging process by limiting h3 > h1, that is, a certain extrusion force can be formed on the corner at the bottom 211 for at least partially counteracting the expansion force.
In one embodiment, it will be appreciated that hot liquid metal, i.e., hot molten metal, will cause the mold half cavity 101 to expand during the casting process, and that, upon cooling at temperature, the coarse product formed in the product mold cavity will retract, i.e., cause the product to shrink in size. In order to ensure the quality of the molded product, the respective values K1 and K2 can be taken according to the type of the crude product formed by the respective casting.
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 a sand burying gradient from the sand filling end 103 towards the splicing surface 102, so that the cross section area surrounded by the upper sand shell 11 gradually decreases in the direction from the sand filling end 103 towards 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; and a matching included angle is formed between the first matching inclined plane and the second matching inclined plane; when the second mating inclined surface is attached to the inner sidewall 109 corresponding to the inner cavity 107, the connecting portion 311 forms an angle with the bottom 1111 of the first mating groove 111, which is the same as the mating angle; when the first tension member 31 and the second tension member 32 are locked by the locking member, the engagement portion 312 swings within the inner chamber 107 such that the first engagement ramp engages with the corresponding inner side wall 109 of the inner chamber 107.
In a specific example, by arranging the end surfaces of the engaging portions 312 for abutting against the corresponding inner side walls 109 as the first engaging inclined surfaces and the second engaging inclined surfaces disposed at the included angles therebetween, the first engaging inclined surfaces and the second engaging inclined surfaces can be engaged with the inner side walls 109 stably in sequence under the tensioning force, that is, the engaging portions 312 can be switched between two positions. Specifically, in the process of installing the engaging 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 engaging surface is tightly attached to the inner sidewall 109, and in the sand burying process, the engaging portion 312 can be ensured to be tightly attached to the inner sidewall 109 by the second engaging surface, and when the first tensioning member 31 and the second tensioning member 32 are tensioned, the second engaging surface is converted into the first engaging surface to be tightly attached to the inner sidewall 109, and at the moment, the corresponding position of the connecting portion 311 is completely attached to the bottom 1111 of the first engaging groove 111, so that in the subsequent process of lifting the casting mold 100, the contact area between the connecting portion 311 and the first engaging groove 111 is prevented from being too small, even the line-to-line engaging relationship is formed, and the shearing force applied to the connecting portion 311 is too large to be easily damaged, and the safety is easily generated in the lifting process.
Further, the connecting portion 311 is a long bar, and the long bar is fixedly connected to one side of the matching portion 312, which is close to the inner cavity 107, through the corresponding first matching groove 111; the matching part 312 is of 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 of the connecting part 311 driving 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 and a motion track of the connecting part 311 in the corresponding first matching groove 111 are arranged in a coplanar manner; one end of the mating portion 312 away from the splicing surface 102 is a first extrusion end 3121, and one end of the mating portion 312 close to the splicing surface 102 is a second extrusion end 3122; the cross-sectional area enclosed by the fitting portion 312 increases and then decreases in a direction from the first pressing end 3121 toward the second pressing end 3122.
On the basis of the above embodiment, in this embodiment, since the connection between the first center and the second center and the running track of the connection portion 311 in the corresponding first matching groove 111 are arranged in a coplanar manner, and the first center is located at the side of the second center away from the half mold cavity 101, the second extrusion end 3122 can be moved towards the direction close to the corresponding half mold cavity 101 under the action of tightening the first tightening member 31 and the second tightening member 32, so as to provide extrusion force for extruding sand located therebetween to the half mold cavity 101, so as to be convenient for resisting the expansion force of the half mold cavity 101 caused in the process of pouring hot metal liquid to a certain extent, and ensure that the deformation amount of the half mold cavity 101 is within the set range.
Preferably, the cavity template 20 is provided with a cavity shell 21 for forming the half mold cavity 101, and when the cavity template 20 is connected to the mating end 104 of the sand feeding shell 11 far from the sand filling end 103, a first distance is formed between the mating part 312 and the cavity shell 21 along the transverse direction; the adjustment assembly 30 includes: a guiding inclined surface structure disposed at the first pressing end 3121, and the guiding inclined surface structure is disposed at a side of the first pressing end 3121 away from the connection portion 311; wherein the area where the corresponding fitting portion 312 swings in the cavity 107 partially coincides with the cavity housing 21 in the lateral direction; and the partial overlap includes at least a position corresponding to the bottom 211 of the cavity housing 21 away from its opening. When the first tightening member 31 and the second tightening member 32 are locked by the locking member, the second pressing end 3122 moves toward the direction approaching the cavity housing 21, the first pressing end 3121 moves toward the direction departing from the cavity housing 21, and the connecting rod is engaged with the groove bottom 1111 of the first engagement groove 111.
Preferably, the sand box 10 is provided with a positioning protrusion corresponding to the position of the adjusting assembly 30; 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 piece 31 and the second tensioning piece 32, and the first mounting waist-shaped groove 34 is used for being matched with the locking piece; casting mold 100 further includes: the transverse correcting component 40, 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 bulge; an angle reader 50, the angle reader 50 being connected to the flask 10 at a position corresponding to the adjusting assembly 30, and the angle reader 50 being used to measure the angle between the outer sidewall 105 of the flask 10 provided with the adjusting assembly 30 and the adjusting assembly 30; wherein the angle formed between the outer sidewall 105 and the adjustment assembly 30 changes as the mating portion 312 of the first tension member 31 and/or the mating portion 312 of the second tension member 32 swings within the inner chamber 107.
Specifically, by means of the transverse tensioning action of the transverse correction assembly 40, the fitting portion 312 can be ensured to be closely attached to the inner side wall 109, specifically, the first fitting surface or the second fitting surface of the fitting portion 312 can be sequentially and stably fitted with the corresponding inner side wall 109, and when the fitting portion 312 is mounted to the inner cavity 107, unstable fitting between the fitting portion 312 and the inner side wall 109, for example, a larger fitting clearance is formed between the fitting portion 312 and the inner side wall 109, on one hand, the size of a sweeping volume formed by swinging of the fitting portion 312 is not guaranteed, and therefore the size of an extrusion amount formed by extrusion force of the half mold cavity 101 cannot be accurately obtained; on the other hand, the lengths of the connection portion 311 of the first tension member 31 and the connection portion 311 of the second tension member 32 extending outside the flask 10 are easily kept uniform, so that stable lifting is not facilitated, the casting mold 100 is easily prevented from being maintained in a relatively stable state during lifting, and in particular, the casting mold 100 is easily lifted in an inclined state, so that the performance of the blank placed in the product mold cavity is affected, and particularly, the blank is still in an incompletely shaped state at this time.
Preferably, the positioning protrusion is a positioning cylinder 112; the adjusting part 30 is provided with a connecting plate 33 corresponding to the positioning cylinder 112, the connecting plate 33 is provided with a screw hole, and the transverse correcting part 40 comprises: the correction screw 41 is in threaded connection with the corresponding screw hole through a second waist-shaped hole; the positioning plate 42, the positioning plate 42 is fixedly connected with the correction screw 41, and the positioning plate 42 is positioned at one side of the connecting plate 33 close to the sand box 10; the spring piece 43, one end of the spring piece 43 is sleeved on the correcting screw 41, the other end is sleeved on the corresponding positioning cylinder 112, and the spring piece 43 is clamped between the positioning plate 42 and the sand box 10; wherein adjustment of the correction screw 41 moves the positioning plate 42 in a direction toward or away from the corresponding positioning cylinder 112 to deform the spring member 43 provided therein.
Preferably, the flask 10 is provided with a mating end 104 disposed opposite the sand filling end 103, and the cavity matchplate 20 is mounted to the mating end 104; a plurality of embedded holes are formed along the circumferential position of the matching end 104, and a plurality of connecting holes matched with the embedded holes are formed in the cavity template 20; the casting mold 100 includes: the guide rod assembly is inserted with the embedded holes and the connecting holes correspondingly.
Embodiment two:
referring to fig. 8, a schematic flow chart of a casting production process according to the present embodiment is provided. The casting production process is applied to the casting mold 100 as in the first embodiment described above; with reference to fig. 1 to 7, the casting production process specifically includes:
step S1, placing the cavity template 20 on a horizontal plane, and arranging the side surface of the cavity template 20 with the cavity shell 21 upwards; wherein, the side surface of the cavity template 20, which is correspondingly provided with the cavity shell 21, is provided with a limit clamping groove, and the limit clamping groove is arranged around the circumference of the cavity shell 21;
step 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; wherein the cavity housing 21 comprises a cavity body and a first pouring channel 106 communicated with the cavity body;
step S3, the first tightening member 31 is mounted 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;
step S4, filling sand into the sand filling end 103 so that the sand fills the inner cavity;
step S5, trimming sand to enable the sand to be flush with the end face where the sand filling end 103 is located, covering a sealing plate on the sand filling end 103, and inverting the upper sand shell 11 and the cavity template so that the cavity template is located above the upper sand shell 11 in the vertical direction;
step S6, removing 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 the second matching groove, filling sand into the inner cavity of the lower sand shell 12, and removing the cavity template 20 from the lower sand shell 12 to obtain another corresponding half mold cavity 101;
step S8, splicing the lower sand shell 12 with the half mould cavity 101 to the upper sand shell 11 to form a complete cavity consisting of two half mould cavities 101;
in step S9, the locking member is connected to the first tension member 31 and the second tension member 32 to fix the upper shell 11 and the lower shell 12, and the casting liquid is cast through the casting channel 106 communicating with the complete cavity to obtain the rough product.
Preferably, the rough product is a buffer; finishing the sand to be flush with the end face where the sand filling end 103 is located includes:
step S51 of weighing the upper sand shell 11 having the cavity mold plate 20 and filled with sand to obtain a first weight;
step S52, comparing the calculated first weight with the corresponding standard weight;
step S53, if the weight difference between the first weight and the standard weight falls 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 template are placed upside down so that the cavity template is located above the upper sand shell 11 in the vertical direction.
The 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 portion 312 in the inner cavity meet the casting condition;
step S921, if the requirements are met, casting liquid is cast through a casting channel 106 communicated with the complete cavity, so that a crude product is obtained;
if not, step S922 is performed, the position of the adjusting assembly 30 relative to the flask 10 is adjusted until the casting condition is satisfied between the included angle and the swinging angle of the mating portion 312 in the cavity.
Specifically, the technical effects corresponding to any one of the technical solutions in the above embodiment can be achieved in this embodiment, and will not be described herein again.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (10)
1. The casting mold with the 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 plane where the upper sand shell and the lower sand shell are spliced 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 sand filling device is characterized in that the sand filling height of the sand filling shell corresponding to the position where the half-mold cavity is formed is h1, the sand filling end is arranged at one end of the sand filling shell far away from the opening of the half-mold cavity, and the distance between the end face of the sand filling end and the bottom of the corresponding half-mold cavity is h2; wherein, h1 and h2 satisfy the following relationship of formula 1: equation 1: h2 is more than h1 and less than or equal to 2/3 (h1+h2);
the casting mold further includes an adjustment assembly for tensioning the cope and drag shells, the adjustment assembly comprising:
the first tensioning piece is connected to the first matching groove of the upper sand shell, the first tensioning piece is 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 with the inner cavity of the upper sand shell; the matching part is provided with an arc-shaped surface structure, the arc-shaped surface structure is arranged towards the direction of the inner cavity, the distance formed between the first matching groove and the splicing surface is h3, and h1 is less than or equal to h3 and less than or equal to (h1+h2);
the second tensioning piece is arranged opposite to the first tensioning piece and connected with the second matching groove of the lower sand shell, and the second tensioning piece and the first tensioning piece are identical in structure;
when the locking piece locks the first tensioning piece and the second tensioning piece, the volume swept by the matching part in the inner cavity by swinging is V, and then V meets the following formula 2:
equation 2: K2×V1 is not less than V and not more than K1×V1; wherein 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 of claim 1, wherein the upper shell is the same structure as the lower shell;
the inner cavity of the upper sand shell is provided with sand burying inclination from the sand filling end towards the splicing surface, so that the cross section area surrounded by the upper sand shell is gradually reduced from the sand filling end towards the splicing surface;
the matching part is provided with a first matching inclined plane and a second matching inclined plane which are used for being matched 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 surface is attached to the corresponding inner side wall of the inner cavity, the connecting part and the bottom surface of the first matching groove form an angle which is the same as the matching included angle; when the first tensioning piece and the second tensioning 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, characterized in that,
the connecting part is a strip rod piece, and the strip rod piece is fixedly connected with one side of the matching part, which is close to the inner cavity, 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 and a motion track of the connecting part in the corresponding first matching groove are arranged in a coplanar mode;
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; and the cross section area enclosed by the matching part is increased and then reduced in the direction from the first extrusion end to the second extrusion end.
4. A casting mould according to claim 3, wherein the cavity template is provided with a cavity shell for forming the half mould cavity, and a first distance is formed between the mating part and the cavity shell along the transverse direction when the cavity template is connected to the mating end of the cope shell, which is far away from the sand filling end; the adjustment assembly includes:
the guide inclined surface structure is arranged at the first extrusion end and is positioned at one side of the first extrusion end far away from the connecting part; the area corresponding to the swinging of the matching part in the inner cavity is partially overlapped with the cavity shell in the transverse direction; and the partial overlap at least comprises a bottom position corresponding to the cavity shell and 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. A casting mould according to claim 3, wherein the flask is provided with a positioning projection in correspondence with the position of the adjusting assembly; the adjusting assembly is provided with a first mounting waist-shaped groove, the first mounting waist-shaped groove is arranged on 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 bulge;
an angle reader connected to a position of the flask corresponding to the adjustment assembly, and configured to measure an angle between an outer sidewall of the flask provided with the adjustment assembly and the adjustment assembly;
wherein, when the cooperation portion of the first tensioning member and/or the cooperation portion of the second tensioning member swings in the inner cavity, the angle formed between the outer side wall and the adjusting component changes.
6. The casting mold according to claim 5, wherein,
the positioning bulge is a positioning cylinder; the adjusting component is provided with a connecting plate at the position corresponding to the positioning cylinder, and the connecting plate is provided with a screw hole; the lateral correction assembly includes:
the correcting screw rod is in threaded connection with the corresponding screw hole;
the positioning plate is fixedly connected with the correction screw rod and is positioned at one side of the connecting plate, which is close to the sand box;
the spring piece is sleeved on the correction screw rod at one end, sleeved on the corresponding positioning cylinder at the other end, and clamped between the positioning plate and the sand box;
and the correction screw is adjusted to enable the positioning plate to move towards a direction close to or far away from the corresponding positioning cylinder, so that the spring piece arranged in the correction screw is deformed.
7. The casting mold according to claim 1, wherein,
the sand box is provided with a matching end which is arranged opposite to the sand filling end, and the cavity template is mounted to the matching end; a plurality of embedded holes are formed along the circumferential position of the matching end, and the cavity template is provided with a plurality of connecting holes matched with the embedded holes; the casting mold includes:
the guide rod assembly is correspondingly inserted with the embedded holes and the connecting holes.
8. A casting process, characterized in that it is applied to a casting mould according to any one of the preceding claims 1-7; the casting production process comprises the following steps:
step S1, placing the cavity template on a horizontal plane, and enabling the side surface of the cavity template with a cavity shell to face upwards; the side surface of the cavity template, which is correspondingly provided with the cavity shell, is provided with a limit clamping groove, and the limit 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;
step S4, filling sand into the sand filling end so that the inner cavity is filled with the sand;
s5, trimming the sand to be level with the end face where the sand filling end is located, covering a sealing plate on the sand filling end, and then inverting the sand feeding shell and the cavity template to enable the cavity template to be located above the sand feeding shell in the vertical direction;
step S6, the cavity template is removed from the upper sand shell, so that a corresponding half-mold cavity is formed in the upper sand shell;
step S7, the cavity template is matched with the lower sand shell, the second tensioning piece is installed in the second matching groove, sand is filled into the inner cavity of the lower sand shell, and the cavity template is removed from the lower sand shell to obtain another corresponding half mold cavity;
step S8, splicing the lower sand shell with the half-mold cavity to the upper sand shell to form a complete cavity consisting of 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 through a pouring channel communicated with the complete cavity to obtain a coarse product.
9. The casting process of claim 8, wherein the crude product is a buffer; said dressing said sand to be flush with the end face where said sand filling end is located comprises:
step S51 of weighing the upper sand shell having the cavity mold plate and the sand filled therein 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 S54, after the sealing plate is covered on the sand filling end, the sand feeding shell and the cavity template are positioned upside down, so that the cavity template is positioned above the sand feeding shell in the vertical direction.
10. The casting process according to claim 9, wherein the step S9 specifically comprises:
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 swinging angle of the matching part in the inner cavity meet casting conditions or not;
step S921, if the requirements are met, casting liquid is cast through a casting channel communicated with the complete cavity, so that a crude product is obtained;
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 portion in the inner cavity meet the pouring condition.
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| CN202211592320.1A CN115700153B (en) | 2022-12-13 | 2022-12-13 | Casting mold with adjusting function and casting production process |
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| GB358697A (en) * | 1930-09-19 | 1931-10-15 | Abraham Martinius Erichsen | Improvements in moulds for casting metals and metal alloys |
| DE102016008125A1 (en) * | 2016-07-05 | 2018-01-11 | Senvion Gmbh | Production form of a rotor blade |
| CN108339944B (en) * | 2018-04-27 | 2024-08-30 | 石家庄瑞特泵业有限公司 | Casting die for molding impeller of water pump |
| CN109175245B (en) * | 2018-10-25 | 2020-11-17 | 芜湖泓鹄材料技术有限公司 | Casting process of automobile body mould casting |
| CN114226647B (en) * | 2021-12-01 | 2024-03-26 | 宁波金汇精密铸造有限公司 | Casting device and sand box |
| CN114210923A (en) * | 2021-12-07 | 2022-03-22 | 青岛连山铸造有限公司 | A new type of coupler mold integrating hook body and tongue and using method thereof |
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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 |