CN110757114A - Production process of stepped cavity mold - Google Patents

Production process of stepped cavity mold Download PDF

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Publication number
CN110757114A
CN110757114A CN201911227858.0A CN201911227858A CN110757114A CN 110757114 A CN110757114 A CN 110757114A CN 201911227858 A CN201911227858 A CN 201911227858A CN 110757114 A CN110757114 A CN 110757114A
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CN
China
Prior art keywords
die
blank
cavity
mold
main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911227858.0A
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Chinese (zh)
Inventor
肖伟雄
郑桂林
马广兴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUANGZHOU DIE AND MOULD MANUFACTURING Co Ltd
Original Assignee
GUANGZHOU DIE AND MOULD MANUFACTURING Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GUANGZHOU DIE AND MOULD MANUFACTURING Co Ltd filed Critical GUANGZHOU DIE AND MOULD MANUFACTURING Co Ltd
Priority to CN201911227858.0A priority Critical patent/CN110757114A/en
Publication of CN110757114A publication Critical patent/CN110757114A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/24Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/06Permanent moulds for shaped castings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/22Moulds for peculiarly-shaped castings

Abstract

The invention discloses a production process of a step cavity die, which comprises the following steps: blanking a fixed die blank and a movable die blank, and performing rough machining, tempering and finish machining to obtain a movable die and a fixed die; the middle part of the fixed die blank is provided with a main die cavity, the middle part of the movable die blank is provided with an auxiliary die cavity, and a plurality of through holes are drilled in the auxiliary die cavity; blanking a plurality of molded columns, carrying out heat treatment on the plurality of molded columns, and fixing the plurality of molded columns after heat treatment in the plurality of through holes; blanking and obtaining a main mold core blank through rough machining, and further performing heat treatment and finish machining on the main mold core blank to obtain a main mold core; assembling and fixing the main mold core in a main mold cavity of the fixed mold; and closing the fixed mold and the fixed mold to enable the plurality of the molding columns to be abutted against the main mold core. The fixed die, the movable die, the main die core and the plurality of the mold columns are respectively processed, so that the processing precision of the fixed die, the movable die, the main die core and the plurality of the mold columns is high, the main die core and the plurality of the mold columns are uniform in hardness after heat treatment, the forming and demolding effects are good, and the casting quality can be improved.

Description

Production process of stepped cavity mold
Technical Field
The invention relates to the technical field of cavity die production, in particular to a production process of a step cavity die.
Background
An elevator step is the basic structural component of an escalator. Elevator steps are typically cast using large molds. In order to increase the drainage effect of many elevator steps, through holes need to be formed at the connection positions of step footplates, footplates and kickplates.
The conventional step cavity die cannot integrally form a through hole, the through hole needs to be subjected to secondary processing by a punching tool, and the secondary punching possibly influences the structural strength of the original step. In addition, the phenomenon of uneven hardness of each part is easy to occur during the processing of the die core, so that the die core is easy to bond casting materials, and the casting quality is influenced.
Disclosure of Invention
Based on the above, the invention aims to provide a production process of a stepped cavity die.
The invention relates to a production process of a step cavity die, which comprises the following steps:
blanking a fixed die blank and a movable die blank, and performing rough machining, tempering and finish machining to obtain a movable die and a fixed die; the middle part of the fixed die blank is provided with a main die cavity, the middle part of the movable die blank is provided with an auxiliary die cavity, and a plurality of through holes are drilled in the auxiliary die cavity;
blanking a plurality of molded columns, carrying out heat treatment on the plurality of molded columns, and fixing the plurality of molded columns after heat treatment in the plurality of through holes;
blanking and obtaining a main mold core blank through rough machining, and further performing heat treatment and finish machining on the main mold core blank to obtain a main mold core;
assembling and fixing the main mold core in a main mold cavity of the fixed mold;
and closing the fixed mold and the fixed mold to enable the plurality of the molding columns to be abutted against the main mold core.
According to the production process of the step cavity die, the fixed die, the movable die, the main die core and the plurality of die columns are processed respectively, so that the processing precision of the fixed die, the movable die, the main die core and the plurality of die columns is high, the main die core and the plurality of die columns are uniform in hardness after heat treatment, the forming and demolding effects are good, and the casting quality can be improved; the step cavity die manufactured by the process can integrally form the through holes on the steps, greatly improves the processing efficiency and can avoid the influence of secondary processing on the strength.
In one embodiment, the blanking of the fixed die blank and the movable die blank comprises rough machining: and (4) blanking by using 45# or 50# steel, and roughly machining to form a blank.
In one embodiment, the modulating, finishing, comprises: tempering to a hardness of 28-32HRC, and finishing the main die cavity and the auxiliary die cavity, deburring and polishing.
In one embodiment, the blanking multi-column comprises: h13 steel is selected to be blanked to obtain a multi-section column.
In one embodiment, the heat treating the plurality of types of columns includes: continuously heating the multiple shaped columns to 800-850 ℃, cooling the multiple shaped columns to 480-520 ℃ by using oil cooling, then air-cooling, reheating the air-cooled shaped columns to 500-580 ℃, and then oil cooling to ensure that the hardness is 46-49 HRC.
In one embodiment, the blanking and rough machining provides a master mold core blank, including: and (3) blanking H13 steel, forming a blank through bench work processing and numerical control processing, and reserving a finish machining allowance to obtain the main mold core blank.
In one embodiment, the further heat treating of the main mold core blank and the heat treating in the finishing comprises: continuously heating the main mold core blank to 980-1030 ℃, then cooling the mold core blank to 420-450 ℃ by using oil cooling or air cooling, then air cooling, and tempering the air-cooled mold core blank to ensure that the hardness of the mold core blank is 45-48 HRC.
In one embodiment, the further heat treating and finishing of the main mold core blank comprises: removing the excess material and burrs, and polishing.
In one embodiment, the further heat treating and finishing of the main mold core blank further comprises: and carrying out oxidation or nitridation treatment on the polished main mold core blank to form an oxide film layer or a nitride film layer.
The production process of the step cavity die has the beneficial effects that:
(1) according to the production process of the stepped cavity die, the fixed die, the movable die, the main die core and the plurality of the mold columns are respectively processed, so that the processing precision of the fixed die, the movable die, the main die core and the plurality of the mold columns is high, the main die core and the plurality of the mold columns are uniform in hardness after heat treatment, the molding and demolding effects are good, and the casting quality can be improved.
(2) The step cavity die manufactured by the process can integrally form the through holes on the steps, greatly improves the processing efficiency and can avoid the influence of secondary processing on the strength.
(3) The step cavity die has the advantages of simple production process, high machining precision and good comprehensive performance of the main die core and the die column.
Detailed Description
The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The invention relates to a production process of a step cavity die, which comprises the following steps:
s1, blanking a fixed die blank and a movable die blank, and performing rough machining, tempering and finish machining to obtain a movable die and a fixed die; the middle part of the fixed die blank is provided with a main die cavity, the middle part of the movable die blank is provided with an auxiliary die cavity, and a plurality of through holes are drilled in the auxiliary die cavity.
In this step, unloading cover half blank and movable mould blank, rough machining includes: and (4) blanking by using 45# or 50# steel, and roughly machining to form a blank.
In one embodiment, the modulating, finishing, comprises: tempering to a hardness of 28-32HRC, and finishing the main die cavity and the auxiliary die cavity, deburring and polishing.
S2, blanking the multiple molded columns, carrying out heat treatment on the multiple molded columns, and fixing the multiple molded columns subjected to heat treatment in the multiple through holes.
In this step, many molding columns of unloading include: h13 steel is selected to be blanked to obtain a multi-section column.
In one embodiment, the heat treating the plurality of types of columns includes: continuously heating the multiple shaped columns to 800-850 ℃, cooling the multiple shaped columns to 480-520 ℃ by using oil cooling, then air-cooling, reheating the air-cooled shaped columns to 500-580 ℃, and then oil cooling to ensure that the hardness is 46-49 HRC. The column after heat treatment has good strength and hardness, good molding effect, easy demoulding and no adhesion.
And S3, blanking, roughly processing to obtain a main mold core blank, and further thermally treating and finely processing the main mold core blank to obtain the main mold core.
In this step, the blanking and rough machining process to obtain a master mold core blank includes: and (3) blanking H13 steel, forming a blank through bench work processing and numerical control processing, and reserving a finish machining allowance to obtain the main mold core blank.
In one embodiment, the further heat treating of the main mold core blank and the heat treating in the finishing comprises: continuously heating the main mold core blank to 980-1030 ℃, then cooling the mold core blank to 420-450 ℃ by using oil cooling or air cooling, then air cooling, and tempering the air-cooled mold core blank to ensure that the hardness of the mold core blank is 45-48 HRC. After heat treatment, the microstructure of the main die core is transformed into martensite, carbide, bainite and residual austenite precipitated along a grain boundary are reduced or avoided, the hardness of the die core is uniform, the forming and demoulding effects of the die core are improved, and the hardness and the strength of the tempered die core are good.
In one embodiment, the further heat treating and finishing of the main mold core blank comprises: removing redundant materials and burrs, and polishing; and carrying out oxidation or nitridation treatment on the polished main mold core blank to form an oxide film layer or a nitride film layer.
The thickness of the oxidation film layer or the nitridation film layer is less than or equal to 0.13 mm. The thickness of the oxide film layer or the nitride film layer is set to be less than or equal to 0.13mm, so that the thickness of the oxide film layer or the nitride film layer is moderate, and the over-thick oxide film layer or the over-thick nitride film layer is easy to fall off at parting surfaces and sharp corners, so that a casting is scratched during demoulding.
S4, assembling and fixing the main mold core in the main mold cavity of the fixed mold.
And S5, closing the fixed die and the fixed die to enable the plurality of the molded columns to be abutted against the main die core. The extension length of the profile column can be calculated in advance, the contact position of the profile column and the through hole is limited and sealed, and the limitation and sealing can be carried out in the mode that bolts are arranged on the profile column or a protruding part is integrally processed.
The above-mentioned S1 to S5 are not limited in terms of sequence, and the processing sequence of S1 to S3 may be adjusted according to actual production conditions.
The production process of the step cavity die has the beneficial effects that:
(1) according to the production process of the stepped cavity die, the fixed die, the movable die, the main die core and the plurality of the mold columns are respectively processed, so that the processing precision of the fixed die, the movable die, the main die core and the plurality of the mold columns is high, the main die core and the plurality of the mold columns are uniform in hardness after heat treatment, the molding and demolding effects are good, and the casting quality can be improved.
(2) The step cavity die manufactured by the process can integrally form the through holes on the steps, greatly improves the processing efficiency and can avoid the influence of secondary processing on the strength.
(3) The step cavity die has the advantages of simple production process, high machining precision and good comprehensive performance of the main die core and the die column.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (9)

1. A production process of a step cavity die is characterized by comprising the following steps:
blanking a fixed die blank and a movable die blank, and performing rough machining, tempering and finish machining to obtain a movable die and a fixed die; the middle part of the fixed die blank is provided with a main die cavity, the middle part of the movable die blank is provided with an auxiliary die cavity, and a plurality of through holes are drilled in the auxiliary die cavity;
blanking a plurality of molded columns, carrying out heat treatment on the plurality of molded columns, and fixing the plurality of molded columns after heat treatment in the plurality of through holes;
blanking and obtaining a main mold core blank through rough machining, and further performing heat treatment and finish machining on the main mold core blank to obtain a main mold core;
assembling and fixing the main mold core in a main mold cavity of the fixed mold;
and closing the fixed mold and the fixed mold to enable the plurality of the molding columns to be abutted against the main mold core.
2. The step cavity die production process of claim 1, wherein the blanking of the fixed die blank and the movable die blank comprises rough machining: and (4) blanking by using 45# or 50# steel, and roughly machining to form a blank.
3. The step cavity mold production process of claim 2, wherein the modulating, finishing, comprises: tempering to a hardness of 28-32HRC, and finishing the main die cavity and the auxiliary die cavity, deburring and polishing.
4. The step cavity mold production process of claim 1, wherein blanking the plurality of mold columns comprises: h13 steel is selected to be blanked to obtain a multi-section column.
5. The step cavity mold production process of claim 4, wherein the heat treating the plurality of mold columns comprises: continuously heating the multiple shaped columns to 800-850 ℃, cooling the multiple shaped columns to 480-520 ℃ by using oil cooling, then air-cooling, reheating the air-cooled shaped columns to 500-580 ℃, and then oil cooling to ensure that the hardness is 46-49 HRC.
6. The process for producing a stepped cavity mold according to any one of claims 1 to 5, wherein said blanking and rough machining provides a master mold core blank comprising: and (3) blanking H13 steel, forming a blank through bench work processing and numerical control processing, and reserving a finish machining allowance to obtain the main mold core blank.
7. The step cavity mold production process of claim 6, wherein the further heat treatment of the main mold core blank and the heat treatment in the finishing comprises: continuously heating the main mold core blank to 980-1030 ℃, then cooling the mold core blank to 420-450 ℃ by using oil cooling or air cooling, then air cooling, and tempering the air-cooled mold core blank to ensure that the hardness of the mold core blank is 45-48 HRC.
8. The step cavity mold production process of claim 7, wherein the further heat treating and finishing of the main mold core blank comprises: removing the excess material and burrs, and polishing.
9. The step cavity mold production process of claim 8, wherein the further heat treating and finishing of the main mold core blank further comprises: and carrying out oxidation or nitridation treatment on the polished main mold core blank to form an oxide film layer or a nitride film layer.
CN201911227858.0A 2019-12-04 2019-12-04 Production process of stepped cavity mold Pending CN110757114A (en)

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Application Number Priority Date Filing Date Title
CN201911227858.0A CN110757114A (en) 2019-12-04 2019-12-04 Production process of stepped cavity mold

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Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
CN110757114A true CN110757114A (en) 2020-02-07

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201008958Y (en) * 2006-06-08 2008-01-23 广州市型腔模具制造有限公司 Lift step mould having shape position contracting function
CN102950442A (en) * 2012-11-13 2013-03-06 深圳市芭田生态工程股份有限公司 Machining process for extrusion die
CN104607612A (en) * 2014-11-05 2015-05-13 镁联科技(芜湖)有限公司 Pressing mold and die-cast formation method
JP2019107652A (en) * 2017-12-15 2019-07-04 マツダ株式会社 Casting device for the cylinder block of engine, casting mold, and casting method
CN110303135A (en) * 2019-07-06 2019-10-08 广东鸿泰南通精机科技有限公司 A kind of step die-casting process mold and application method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201008958Y (en) * 2006-06-08 2008-01-23 广州市型腔模具制造有限公司 Lift step mould having shape position contracting function
CN102950442A (en) * 2012-11-13 2013-03-06 深圳市芭田生态工程股份有限公司 Machining process for extrusion die
CN104607612A (en) * 2014-11-05 2015-05-13 镁联科技(芜湖)有限公司 Pressing mold and die-cast formation method
JP2019107652A (en) * 2017-12-15 2019-07-04 マツダ株式会社 Casting device for the cylinder block of engine, casting mold, and casting method
CN110303135A (en) * 2019-07-06 2019-10-08 广东鸿泰南通精机科技有限公司 A kind of step die-casting process mold and application method

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Application publication date: 20200207