CN112719061B - Forming process of small hole with chamfered surface in inward-flanged orifice on shell of electric control booster - Google Patents
Forming process of small hole with chamfered surface in inward-flanged orifice on shell of electric control booster Download PDFInfo
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- CN112719061B CN112719061B CN202011400470.9A CN202011400470A CN112719061B CN 112719061 B CN112719061 B CN 112719061B CN 202011400470 A CN202011400470 A CN 202011400470A CN 112719061 B CN112719061 B CN 112719061B
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- hole
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- flanging
- lower forming
- forming hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
- B21D19/088—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for flanging holes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a forming process of a small hole with a chamfered surface at an inward flanging hole opening on an electric control booster shell, which has the advantages of good hole flanging quality and low cost. The transverse partition piece is reserved in the hole during punching, the chamfer face required to be arranged on the orifice at the everting bulge end of the flanging hole is formed at the lower part of the transverse partition piece, and finally the transverse partition piece is punched, so that the hole wall is smooth, the size of the chamfer face on the orifice at the everting bulge end is very accurate, additional machining is not needed, the machining efficiency is high, and the production cost is low.
Description
Technical Field
The invention relates to a forming process of a small hole with a chamfered surface at an inward-turned orifice on a shell of an electric control booster.
Background
Automatically controlled booster is used for electric automobile, because its inside part that sets up of power is different totally different with traditional vacuum booster, and required setting space reduces greatly, make the size of automatically controlled booster casing only about the third of traditional vacuum booster casing, and the installation accuracy requirement of internal assembly part is still very high, in order to guarantee the compactness of assembly, thereby guarantee that the vehicle goes in-process part can not rock at booster inside, reliability and life that the assurance booster used. However, the size of the mounting hole on the shell of the booster is reduced due to the reduction of the appearance of the part, and the punching processing difficulty of the flanging with the diameter smaller than 12mm is very high. The traditional processing technology of hole flanging is that firstly a groove is punched, then the middle part of the bottom wall of the groove is punched, and then the remaining bottom wall of the groove is folded outwards to form. The hole flanging mode not only always causes creases on the inner wall of the hole to cause unsmooth holes, but also influences subsequent installation; moreover, if the orifice at one end of the eversion bulge needs to be processed with a chamfer surface, the process cannot be directly realized by stamping, and only a chamfer machining program can be additionally added subsequently. The chamfering machining procedure is low in carrying, clamping and machining speed, low in machining efficiency and capable of greatly increasing machining cost.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the forming process of the small hole with the chamfered surface at the inward flanged port on the electric control booster shell is good in hole flanging quality and low in cost.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a forming process of a small hole with a chamfer surface at an inward-flanged orifice on a shell of an electric control booster comprises the following steps:
the method comprises the following steps that firstly, a first punch with a conical end part and a spherical top part is adopted on a first upper punching die, the punching depth of the first punch is not more than the depth of finished product hole flanging minus twice the height of a finished product orifice chamfer part, a first material placing groove for accommodating a workpiece plane part is arranged on a first lower punching die, a first lower forming hole is arranged at the bottom of the first material placing groove on the first lower punching die, the side wall of the first lower forming hole is in a conical surface shape, the bottom of the first lower forming hole is in a first arc surface shape protruding towards the orifice, a gap not less than 0.2 is reserved between the top of the first arc surface and the punched bottom of the first punch to form a first transverse partition part, and the first punch and the first lower forming hole are matched to form a first pre-pressing hole on a workpiece;
step two, a second punching upper die is provided with a cylindrical second punch with the diameter smaller than the final aperture of the hole part to be flanged, the punching depth of the second punch is not more than the finished product flanging depth minus two times of the finished product orifice chamfering height, the second punch is provided with an annular chamfering part matched with an orifice arc chamfering surface at one end of the flanging hole far away from the outward-flanging bulge end, a second material containing groove for containing a workpiece plane part is arranged on a second punching lower die, a second lower forming hole matched with the second material containing groove is arranged at the bottom of the second material containing groove on the second punching lower die, the side wall of the second lower forming hole is cylindrical, the diameter and the height of the side wall of the second lower forming hole are consistent with the finished product flanging hole part, the bottom of the second lower forming hole is in a second arc shape protruding towards the orifice, the radius of the second arc surface is more than 3 times of the radius of the first arc surface, a gap larger than the thickness of the first transverse partition piece part exists between the top of the second arc surface and the bottom surface position of the punched second punch to form a second transverse partition piece part to form the second transverse partition piece, the second punch is matched with the second lower forming hole to form the first pre-pressing hole in the workpiece into a second pre-pressing hole;
step three, performing a first step of cleaning the substrate, a third cylindrical punch with the diameter smaller than the final aperture and larger than the diameter of the second punch is adopted on the third upper punching die, the punching depth of the third punch is equal to the punching depth of the second punch, an annular chamfer matched with an orifice arc-shaped chamfer at one end, far away from the outward-turning bulge, of the flanging hole is arranged on the third punch, a third material containing groove for containing the plane part of the workpiece is arranged on the third lower punching die, a third lower forming hole matched with the third material containing groove is arranged at the bottom of the third material containing groove on the third lower punching die, the side wall of the third lower forming hole is cylindrical, the diameter and the height of the side wall of the third lower forming hole are consistent with the hole flanging part of the finished product, a circular truncated cone-shaped convex block with the diameter of the convex top surface being the same as the diameter of the bottom of the third punch and the height being equal to the chamfer part of the flanging hole is arranged at the bottom of the third lower forming hole, and the third punch is matched with the third lower forming hole to form the second pre-pressing hole on the workpiece into a third pre-pressing hole with a third transverse partition part in the middle part;
the fourth step is that, a fourth punching upper die is provided with a cylindrical fourth punch with the diameter being the final hole diameter of the finished hole flanging, the punching depth of the fourth punch is equal to that of the third punch, the fourth punch is provided with an annular chamfer matched with an arc-shaped chamfer of a hole opening at one end, far away from the outward turning bulge, of the hole flanging, a fourth punching lower die is provided with a fourth material accommodating groove for accommodating a workpiece plane part, a fourth lower forming hole matched with the fourth material accommodating groove is arranged at the bottom of the fourth material accommodating groove on the fourth punching lower die, the side wall of the fourth lower forming hole is cylindrical, the diameter and the height of the side wall of the fourth lower forming hole are consistent with those of the finished product flanging hole part, a circular platform-shaped forming lug which is provided with the same diameter of the top surface of the bulge as that of the bottom of the fourth punch and is used for forming the chamfer of the hole flanging hole opening is arranged at the bottom of the fourth lower forming hole, and the fourth punch is matched with the fourth lower forming hole to form a third pre-pressing hole on the workpiece into a fourth pre-pressing hole with a fourth transverse partition part at the middle part;
and step five, adopting a cylindrical fifth punch with the diameter being the final aperture of the finished hole flanging on the fifth stamping upper die, arranging a fifth material placing groove for accommodating the plane part of the workpiece on the fifth stamping lower die, arranging a fifth lower forming hole matched with the fifth material placing groove at the bottom of the fifth material placing groove on the fifth stamping lower die, and matching the fifth punch with the fifth lower forming hole to punch off the transverse partition part in the fourth prepressing hole and carry out final shaping so as to complete hole flanging.
The beneficial effects of the invention are: the transverse partition piece is reserved in the hole during punching, the chamfer face required to be arranged on the orifice at the everting bulge end of the flanging hole is formed at the lower part of the transverse partition piece, and finally the transverse partition piece is punched, so that the hole wall is smooth, the size of the chamfer face on the orifice at the everting bulge end is very accurate, additional machining is not needed, the machining efficiency is high, and the production cost is low.
Drawings
FIG. 1 is a schematic view of the present invention after step one formation.
FIG. 2 is a schematic view of the invention after step two molding.
FIG. 3 is a schematic representation of the invention after step three forming.
FIG. 4 is a schematic view of the invention after step four molding.
Fig. 5 is a schematic representation of the finished product of the present invention.
Detailed Description
Specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1-5, the molding process of the small hole with the chamfer surface at the inward opening of the shell of the electric control booster comprises the following steps:
the method comprises the following steps that firstly, a first punch with a conical end part and a spherical top part is adopted on a first upper punching die, the punching depth of the first punch is not more than the depth of finished product hole flanging minus twice the height of a finished product orifice chamfer part, a first material placing groove for accommodating a workpiece plane part is arranged on a first lower punching die, a first lower forming hole is arranged at the bottom of the first material placing groove on the first lower punching die, the side wall of the first lower forming hole is in a conical surface shape, the bottom of the first lower forming hole is in a first arc surface shape protruding towards the orifice, a gap not less than 0.2 is reserved between the top of the first arc surface and the punched bottom of the first punch to form a first transverse partition part, and the first punch and the first lower forming hole are matched to form a first pre-pressing hole on a workpiece;
step two, a second punching upper die is provided with a cylindrical second punch with the diameter smaller than the final aperture of the hole part to be flanged, the punching depth of the second punch is not more than the finished product flanging depth minus two times of the finished product orifice chamfering height, the second punch is provided with an annular chamfering part matched with an orifice arc chamfering surface at one end of the flanging hole far away from the outward-flanging bulge end, a second material containing groove for containing a workpiece plane part is arranged on a second punching lower die, a second lower forming hole matched with the second material containing groove is arranged at the bottom of the second material containing groove on the second punching lower die, the side wall of the second lower forming hole is cylindrical, the diameter and the height of the side wall of the second lower forming hole are consistent with the finished product flanging hole part, the bottom of the second lower forming hole is in a second arc shape protruding towards the orifice, the radius of the second arc surface is more than 3 times of the radius of the first arc surface, a gap larger than the thickness of the first transverse partition piece part exists between the top of the second arc surface and the bottom surface position of the punched second punch to form a second transverse partition piece part to form the second transverse partition piece, the second punch is matched with the second lower forming hole to form the first pre-pressing hole in the workpiece into a second pre-pressing hole;
step three, performing a first step of cleaning the substrate, a third cylindrical punch with the diameter smaller than the final aperture and larger than the diameter of the second punch is adopted on the third upper punching die, the punching depth of the third punch is equal to the punching depth of the second punch, an annular chamfer matched with an orifice arc-shaped chamfer at one end, far away from the outward-turning bulge, of the flanging hole is arranged on the third punch, a third material containing groove for containing the plane part of the workpiece is arranged on the third lower punching die, a third lower forming hole matched with the third material containing groove is arranged at the bottom of the third material containing groove on the third lower punching die, the side wall of the third lower forming hole is cylindrical, the diameter and the height of the side wall of the third lower forming hole are consistent with the hole flanging part of the finished product, a circular truncated cone-shaped convex block with the diameter of the convex top surface being the same as the diameter of the bottom of the third punch and the height being equal to the chamfer part of the flanging hole is arranged at the bottom of the third lower forming hole, and the third punch is matched with the third lower forming hole to form the second pre-pressing hole on the workpiece into a third pre-pressing hole with a third transverse partition part in the middle part;
step four, performing a first step of cleaning the substrate, a fourth punching upper die is provided with a cylindrical fourth punch with the diameter being the final hole diameter of the finished hole flanging, the punching depth of the fourth punch is equal to that of the third punch, the fourth punch is provided with an annular chamfer matched with an arc-shaped chamfer of a hole opening at one end, far away from the outward turning bulge, of the hole flanging, a fourth punching lower die is provided with a fourth material accommodating groove for accommodating a workpiece plane part, a fourth lower forming hole matched with the fourth material accommodating groove is arranged at the bottom of the fourth material accommodating groove on the fourth punching lower die, the side wall of the fourth lower forming hole is cylindrical, the diameter and the height of the side wall of the fourth lower forming hole are consistent with those of the finished product flanging hole part, a circular platform-shaped forming lug which is provided with the same diameter of the top surface of the bulge as that of the bottom of the fourth punch and is used for forming the chamfer of the hole flanging hole opening is arranged at the bottom of the fourth lower forming hole, and the fourth punch is matched with the fourth lower forming hole to form a third pre-pressing hole on the workpiece into a fourth pre-pressing hole with a fourth transverse partition part at the middle part;
and step five, adopting a cylindrical fifth punch with the diameter being the final aperture of the finished hole flanging on the fifth stamping upper die, arranging a fifth material placing groove for accommodating the plane part of the workpiece on the fifth stamping lower die, arranging a fifth lower forming hole matched with the fifth material placing groove at the bottom of the fifth material placing groove on the fifth stamping lower die, and matching the fifth punch with the fifth lower forming hole to punch off the transverse partition part in the fourth prepressing hole and carry out final shaping so as to complete hole flanging.
The above-mentioned embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be used, not restrictive; it should be noted that various changes and modifications can be made by those skilled in the art without departing from the inventive concept, and these changes and modifications fall within the scope of the invention.
Claims (1)
1. A forming process of a small hole with a chamfer surface at an inward-flanged orifice on a shell of an electric control booster comprises the following steps:
the method comprises the following steps that firstly, a first punch with a conical end part and a spherical top part is adopted on a first upper punching die, the punching depth of the first punch is not more than the hole flanging depth of a finished product minus twice the height of a chamfer part of an orifice of the finished product, a first material placing groove for accommodating a plane part of a workpiece is arranged on a first lower punching die, a first lower forming hole is arranged at the bottom of the first material placing groove on the first lower punching die, the side wall of the first lower forming hole is in a conical surface shape, the bottom of the first lower forming hole is in a first arc surface shape protruding towards the orifice, a gap not less than 0.2 is reserved between the top of the first arc surface and the punched bottom of the first punch to form a first transverse partition part, and the first punch and the first lower forming hole are matched to form a first pre-pressing hole on the workpiece;
step two, a second punch head which is cylindrical and has the diameter smaller than the final aperture of the hole part to be flanged is adopted on the second upper punching die, the punching depth of the second punch head is not more than the finished product flanging depth minus two times of the finished product orifice chamfering height, an annular chamfering part matched with an orifice arc chamfering surface at one end, far away from the outward-turning bulge, of the flanging hole is arranged on the second lower punching die, a second material containing groove for containing a workpiece plane part is arranged on the second lower punching die, a second lower forming hole matched with the bottom of the second material containing groove is arranged on the second lower punching die, the side wall of the second lower forming hole is cylindrical, the diameter and the height of the second lower forming hole are consistent with the finished product flanging hole part, the bottom of the second lower forming hole is in a second arc shape protruding towards the orifice, the radius of the second arc surface is more than 3 times of the radius of the first arc surface, a gap which is larger than the thickness of the first transverse partition piece part exists between the top of the second arc surface and the bottom position of the punched second punch head so as to form a second transverse partition piece part, the second punch is matched with the second lower forming hole to form the first pre-pressing hole in the workpiece into a second pre-pressing hole;
step three, performing a first step of cleaning the substrate, a third cylindrical punch with the diameter smaller than the final aperture and larger than the diameter of the second punch is adopted on the third upper punching die, the punching depth of the third punch is equal to the punching depth of the second punch, an annular chamfer matched with an orifice arc-shaped chamfer at one end, far away from the outward-turning bulge, of the flanging hole is arranged on the third punch, a third material containing groove for containing the plane part of the workpiece is arranged on the third lower punching die, a third lower forming hole matched with the third material containing groove is arranged at the bottom of the third material containing groove on the third lower punching die, the side wall of the third lower forming hole is cylindrical, the diameter and the height of the side wall of the third lower forming hole are consistent with the hole flanging part of the finished product, a circular truncated cone-shaped convex block with the diameter of the convex top surface being the same as the diameter of the bottom of the third punch and the height being equal to the chamfer part of the flanging hole is arranged at the bottom of the third lower forming hole, and the third punch is matched with the third lower forming hole to form the second pre-pressing hole on the workpiece into a third pre-pressing hole with a third transverse partition part in the middle part;
step four, performing a first step of cleaning the substrate, a fourth upper stamping die is provided with a cylindrical fourth punch with the diameter being the final aperture of the finished hole flanging, the stamping depth of the fourth punch is equal to that of the third punch, the fourth punch is provided with an annular chamfer part matched with an orifice arc-shaped chamfer surface at one end, far away from the outward-flanging bulge, of the hole flanging, a fourth lower stamping die is provided with a fourth material accommodating groove for accommodating the workpiece plane part, a fourth lower stamping die is provided with a fourth lower forming hole matched with the bottom of the fourth material accommodating groove, the side wall of the fourth lower forming hole is cylindrical, the diameter and the height of the side wall of the fourth lower forming hole are consistent with those of the finished product flanging part, the bottom of the fourth lower forming hole is provided with a circular truncated cone-shaped forming lug which is provided with the same diameter of the top surface of the bulge as the bottom of the fourth punch and is used for forming the chamfered part of the hole flanging, and the fourth punch is matched with the fourth lower forming hole to form the third prepressing hole on the workpiece into a fourth prepressing hole with a fourth transverse partition part in the middle part;
and step five, adopting a cylindrical fifth punch with the diameter being the final aperture of the finished hole flanging on the fifth stamping upper die, arranging a fifth material placing groove for accommodating the plane part of the workpiece on the fifth stamping lower die, arranging a fifth lower forming hole matched with the fifth material placing groove at the bottom of the fifth material placing groove on the fifth stamping lower die, and matching the fifth punch with the fifth lower forming hole to punch off the transverse partition part in the fourth prepressing hole and carry out final shaping so as to complete hole flanging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011400470.9A CN112719061B (en) | 2020-12-03 | 2020-12-03 | Forming process of small hole with chamfered surface in inward-flanged orifice on shell of electric control booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011400470.9A CN112719061B (en) | 2020-12-03 | 2020-12-03 | Forming process of small hole with chamfered surface in inward-flanged orifice on shell of electric control booster |
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| Publication Number | Publication Date |
|---|---|
| CN112719061A CN112719061A (en) | 2021-04-30 |
| CN112719061B true CN112719061B (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011400470.9A Active CN112719061B (en) | 2020-12-03 | 2020-12-03 | Forming process of small hole with chamfered surface in inward-flanged orifice on shell of electric control booster |
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| IT202100020507A1 (en) * | 2021-07-30 | 2023-01-30 | Biemmea Light Engineering & Tech S R L | EQUIPMENT AND METHOD FOR STAMPING METALLIC MATERIAL IN THIN SHEET |
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| CN209986082U (en) * | 2019-03-05 | 2020-01-24 | 上海裕钦精密模具有限公司 | Hole flanging natural chamfering device |
| CN111438276A (en) * | 2020-04-16 | 2020-07-24 | 苏州利来汽车配件有限公司 | High-strength steel plate forming hole flanging die for automobile and hole flanging process thereof |
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| CN101598344A (en) * | 2008-06-06 | 2009-12-09 | 金岐伟 | The manufacture method of air outlet valve base of lighter |
| CN102430642A (en) * | 2011-09-19 | 2012-05-02 | 天津市津兆机电开发有限公司 | Molding process of progressive die of high temperature alloy sheet metal component with high flanging hole |
| CN106238614A (en) * | 2016-02-02 | 2016-12-21 | 苏州宝成汽车冲压有限公司 | The method of molding convex closure and automobile absorber connecting rod on high-strength plate |
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| KR20180080804A (en) * | 2017-01-05 | 2018-07-13 | 김성갑 | Flange hybrid manufacturing apparatus |
| CN206464443U (en) * | 2017-02-24 | 2017-09-05 | 东莞市金铸金属制品有限公司 | A kind of modified cold stamping hole flanging structure |
| CN110340245A (en) * | 2018-04-04 | 2019-10-18 | 浙江盾安热工科技有限公司 | A kind of processing method of heat exchange fin, heat exchange fin and finned heat exchanger |
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| CN111438276A (en) * | 2020-04-16 | 2020-07-24 | 苏州利来汽车配件有限公司 | High-strength steel plate forming hole flanging die for automobile and hole flanging process thereof |
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| Publication number | Publication date |
|---|---|
| CN112719061A (en) | 2021-04-30 |
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