CN112692526A - Closed extrusion die machining method - Google Patents
Closed extrusion die machining method Download PDFInfo
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- CN112692526A CN112692526A CN202011501385.1A CN202011501385A CN112692526A CN 112692526 A CN112692526 A CN 112692526A CN 202011501385 A CN202011501385 A CN 202011501385A CN 112692526 A CN112692526 A CN 112692526A
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Abstract
The invention belongs to the field of processing and manufacturing of forging dies, and discloses a processing method of a closed extrusion die, which comprises the following steps: the method comprises the following steps: respectively carrying out rough machining on the left half mould and the right half mould; step two: carrying out heat treatment on the left half mould and the right half mould; step three: the method comprises the following steps of (1) taking a left half-mold bonding surface and a right half-mold bonding surface and a lower end surface as working reference surfaces when the grinding machine sees light; step four: coating glue on the joint surface of the left half mold and the right half mold to bond the left half mold and the right half mold into an integrated mold; step five: carrying out finish machining on the inner cavity and the outer matching surface of the integrated die by using numerical control equipment; step six: and heating the integral mold, preserving heat and separating. By adopting the mode of combining the left half mold and the right half mold into a whole and then processing the two halves and then separately assembling the two halves, the problems that the alignment difficulty is high, the size tolerance of a cavity and the position deviation after mold closing are difficult to guarantee, the accumulated error is large, a special tool needs to be used and the like in the respective processing are solved, the mold quality is guaranteed, the production period is shortened, and the production cost is reduced.
Description
Technical Field
The invention belongs to the technical field of machining and manufacturing of forging dies, and relates to a machining method of a closed extrusion die.
Background
Generally, the extrusion die for forging is mostly of an open structure, generally comprises a female die and a punch, is regular in shape, and can be directly processed by a conventional method respectively so as to meet the requirements of drawings and use. However, some forgings with complex shapes cannot meet the requirements by adopting open type extrusion forging, and a closed type extrusion die forging mode is required.
The closed extrusion die is complex in cavity structure and comprises a die sleeve, a left half die, a right half die and a punch, and meanwhile, the inner cavity and the outer matching surface of the left half die and the right half die are irregular, as shown in fig. 1 and fig. 2, clamping and alignment are difficult to perform, the processing difficulty is high, technical requirements are not easy to guarantee in the conventional method during processing, the requirement on the skill level of an operator is high, and the die quality and the production efficiency are directly influenced.
Disclosure of Invention
The purpose of the invention is: the problems of difficult clamping and alignment, high processing difficulty, difficult guarantee of processing quality and low production efficiency caused by the conventional method for processing the closed extrusion die are solved.
In order to solve the technical problem, the technical scheme of the invention is as follows:
a closed extrusion die processing method comprises the following steps:
the method comprises the following steps: respectively carrying out rough machining on the left half mould and the right half mould;
step two: carrying out heat treatment on the left half mould and the right half mould;
step three: the method comprises the following steps of (1) taking a left half-mold bonding surface and a right half-mold bonding surface and a lower end surface as working reference surfaces when the grinding machine sees light;
step four: coating glue on the joint surface of the left half mold and the right half mold to bond the left half mold and the right half mold into an integrated mold;
step five: carrying out finish machining on the inner cavity and the outer matching surface of the integrated die by using numerical control equipment;
step six: and heating the integral mold, preserving heat and separating.
Further, in the first step, the shape of the left half die and the right half die and the unilateral allowance of the cavity are both 0.3 mm-0.5 mm during rough machining.
Further, in the second step, the left and right half molds are heated to 850 ℃ and insulated for 30min, heated to 1050 ℃ and insulated for 120 min.
Further, in the third step, the planeness of the left half-mold combination surface and the lower end surface of the left half-mold and the right half-mold after being processed by the grinding machine is not more than 0.01.
Further, in the third step, the verticality between the left half-die bonding surface and the lower half-die bonding surface processed by the grinding machine is not more than 0.01.
Further, in the sixth step, the integral mold is heated to 150-200 ℃, and is separated into the left half mold and the right half mold after heat preservation for 30 min.
Further, in the second step, the left and right mold halves are heated in a vacuum preheating furnace.
Further, in the fourth step, the thickness of the glue layer is not more than 0.02 mm.
The invention has the beneficial effects that: the method comprises the steps of firstly combining left and right half moulds in a closed extrusion mould into a whole, then processing the half moulds, and then separately assembling the half moulds; therefore, the problems that the clamping alignment is difficult, the processing difficulty is high, the processing quality is not easy to guarantee and the like caused by the fact that the inner cavity and the outer matching surface of the left half die and the right half die are not regular and the conventional method is adopted for processing are solved, the processing precision is guaranteed, the production efficiency is improved, and the processing cost is reduced.
Drawings
FIG. 1 is a schematic view of a left mold half;
FIG. 2 is a right half-mold schematic view;
FIG. 3 is a schematic view of a closed extrusion die assembly;
in the figure, 1 is a punch, 2 is a die sleeve, 3 is a left half die, and 4 is a right half die.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A certain machine shaft is made of 30CrMnSiA materials, a forging piece is formed by two times of preforging and finish forging, and the preforging die adopts a closed extrusion die structure. As shown in fig. 3, includes: the die comprises a punch 1, a die sleeve 2, a left half die 3 and a right half die 4. The left half die and the right half die of the die, the inner cavity and the outer matching surface are both in irregular shapes, chamfering is not allowed at the position of the matching surface, the dimensional tolerance of the cavity is +/-0.1, the surface roughness is Ra1.6, the position deviation of the left half die and the right half die after die assembly is less than or equal to 0.02, and the matching gap between an outer cone circle and a die sleeve is 0-0.02. In order to solve the problems of difficult clamping and alignment, large processing difficulty, difficult guarantee of processing quality and low production efficiency caused by the conventional method for processing the die, the processing method of the closed extrusion die is provided, and comprises the following steps:
step 1: firstly, respectively roughly processing a left half mould and a right half mould, wherein the shape and the cavity allowance are unilateral 0.3 mm-0.5 mm; the allowance can meet the requirement of sufficient processing amount during finish machining
Step 2: carrying out heat treatment on the left half die and the right half die, heating to 850 ℃, preserving heat for 30 minutes, and continuously heating to 1050 ℃, preserving heat for 2 hours; heating to increase hardness;
and step 3: firstly, the bonding surface and the lower end surface of the left half die and the right half die are exposed on a grinding machine as processing reference surfaces, and the surfaces are cleaned; ensuring that the planeness of the joint surface and the lower end surface is less than or equal to 0.01 and the verticality of the joint surface and the lower end surface is less than or equal to 0.01;
and 4, step 4: coating glue on the joint surface of the left half mold and the right half mold, aligning the two parts and bonding the two parts into a whole;
and 5: finish machining the inner cavity and the outer matching surface of the left half mold and the right half mold by using numerical control equipment;
step 6: heating the left and right half-moulds bonded together in a preheating furnace to 150-200 deg.C, and maintaining the temperature for 0.5 hr;
and 7: separating the left half mold from the right half mold, and cleaning the joint surface.
By adopting the mode of firstly combining the left half mould 3 and the right half mould 4 into a whole and then processing the two halves and then separately assembling the two halves, the problems that the alignment difficulty is high, the size tolerance of a cavity and the position deviation after mould assembly are difficult to guarantee, the accumulated error is large, a special tool needs to be used and the like in the respective processing are solved, the mould quality is guaranteed, the production period is shortened, and the production cost is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (8)
1. A closed extrusion die processing method is characterized in that: the method comprises the following steps:
the method comprises the following steps: respectively carrying out rough machining on the left half mould and the right half mould;
step two: carrying out heat treatment on the left half mould and the right half mould;
step three: the method comprises the following steps of (1) taking a left half-mold bonding surface and a right half-mold bonding surface and a lower end surface as working reference surfaces when the grinding machine sees light;
step four: coating glue on the joint surface of the left half mold and the right half mold to bond the left half mold and the right half mold into an integrated mold;
step five: carrying out finish machining on the inner cavity and the outer matching surface of the integrated die by using numerical control equipment;
step six: and heating the integral mold, preserving heat and separating.
2. The closed extrusion die processing method according to claim 1, wherein: in the first step, the shape of the left half die and the right half die and the unilateral allowance of the cavity are both 0.3 mm-0.5 mm during rough machining.
3. The closed extrusion die processing method according to claim 2, wherein: in the second step, the left and right half moulds are heated to 850 ℃ and insulated for 30min, heated to 1050 ℃ and insulated for 120 min.
4. A closed extrusion die processing method according to claim 3, wherein: in the third step, the planeness of the left half die bonding surface, the right half die bonding surface and the lower end surface processed by the grinding machine is not more than 0.01.
5. The closed extrusion die processing method according to claim 4, wherein: in the third step, the verticality of the left half-die junction surface and the right half-die junction surface and the lower end surface after being processed by the grinding machine is not more than 0.01.
6. The closed extrusion die processing method according to claim 5, wherein: in the sixth step, the integral mold is heated to 150-200 ℃, and is separated into the left half mold and the right half mold after heat preservation for 30 min.
7. The closed extrusion die processing method according to claim 6, wherein: and in the second step, heating the left half mold and the right half mold in a vacuum preheating furnace.
8. The closed extrusion die processing method according to claim 7, wherein: in the fourth step, the thickness of the glue layer is not more than 0.02 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011501385.1A CN112692526A (en) | 2020-12-18 | 2020-12-18 | Closed extrusion die machining method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011501385.1A CN112692526A (en) | 2020-12-18 | 2020-12-18 | Closed extrusion die machining method |
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| CN112692526A true CN112692526A (en) | 2021-04-23 |
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| CN202011501385.1A Pending CN112692526A (en) | 2020-12-18 | 2020-12-18 | Closed extrusion die machining method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000233256A (en) * | 1999-02-12 | 2000-08-29 | Honda Motor Co Ltd | Die and its manufacture |
| CN102059529A (en) * | 2010-12-22 | 2011-05-18 | 苏州东方枫晟科技有限公司 | Excircle processing method of glass mold blank |
| CN103240576A (en) * | 2013-04-27 | 2013-08-14 | 哈尔滨飞机工业集团有限责任公司 | Method for machining split quenched pattern dies |
| CN103264269A (en) * | 2013-06-13 | 2013-08-28 | 沈阳飞机工业（集团）有限公司 | Processing method of long-narrow composite material molding part assembling mould |
| CN105364434A (en) * | 2015-12-08 | 2016-03-02 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Manufacturing method for forging die |
| CN106393398A (en) * | 2016-10-19 | 2017-02-15 | 马鞍山利尔开元新材料有限公司 | Long-service-life alloy steel die and machining method thereof |
| CN106736327A (en) * | 2017-03-03 | 2017-05-31 | 潘勇 | Automotive bumper mold core processing method and process equipment |
| CN208565178U (en) * | 2018-07-27 | 2019-03-01 | 弘朗炭业（上海）有限公司 | A kind of split-type graphite bond processing device |
-
2020
- 2020-12-18 CN CN202011501385.1A patent/CN112692526A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000233256A (en) * | 1999-02-12 | 2000-08-29 | Honda Motor Co Ltd | Die and its manufacture |
| CN102059529A (en) * | 2010-12-22 | 2011-05-18 | 苏州东方枫晟科技有限公司 | Excircle processing method of glass mold blank |
| CN103240576A (en) * | 2013-04-27 | 2013-08-14 | 哈尔滨飞机工业集团有限责任公司 | Method for machining split quenched pattern dies |
| CN103264269A (en) * | 2013-06-13 | 2013-08-28 | 沈阳飞机工业（集团）有限公司 | Processing method of long-narrow composite material molding part assembling mould |
| CN105364434A (en) * | 2015-12-08 | 2016-03-02 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Manufacturing method for forging die |
| CN106393398A (en) * | 2016-10-19 | 2017-02-15 | 马鞍山利尔开元新材料有限公司 | Long-service-life alloy steel die and machining method thereof |
| CN106736327A (en) * | 2017-03-03 | 2017-05-31 | 潘勇 | Automotive bumper mold core processing method and process equipment |
| CN208565178U (en) * | 2018-07-27 | 2019-03-01 | 弘朗炭业（上海）有限公司 | A kind of split-type graphite bond processing device |
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Application publication date: 20210423 |
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