CN110586756A - Hot stamping forming process for preparing vehicle driving pulley execution cylinder - Google Patents
Hot stamping forming process for preparing vehicle driving pulley execution cylinder Download PDFInfo
- Publication number
- CN110586756A CN110586756A CN201910835950.9A CN201910835950A CN110586756A CN 110586756 A CN110586756 A CN 110586756A CN 201910835950 A CN201910835950 A CN 201910835950A CN 110586756 A CN110586756 A CN 110586756A
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- Prior art keywords
- die
- plate
- forming
- preforming
- punching
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Classifications
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
-
- 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
-
- 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
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- 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
-
- 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
- B21D37/16—Heating or cooling
Abstract
The invention discloses a hot stamping forming process for preparing an actuating cylinder of a driving belt wheel for a vehicle, which comprises the following steps: blanking: and (3) blanking the plate on a blanking die, and cleaning oil stains or dust on the blanked blank. Heating: and (4) placing the cleaned plate in a heating furnace, heating to an austenite state and preserving heat. Preforming: after being heated, the plate is quickly transferred to a female die of a thermal forming die, and the blank pressing slide block drives the conical blank pressing ring to tightly press the plate for preforming. Forming; and (3) after preforming, the drawing slide block drives the male die to press downwards for forming, and the edge of the plate or the semi-finished product is formed into a vertical edge along a certain curve according to a certain curvature, so that the forming is completed. Punching: and putting the material into a flanging and punching die to perform flanging and punching. And (3) heat treatment: the thermoformed piece is heat treated. Trimming and shaping: and (4) placing the material on a trimming die for trimming, and placing the material in a shaping die for shaping. The method has the advantages of simple process steps, easy realization of mechanization and automation and suitability for batch production.
Description
Technical Field
The invention relates to the technical field of hot stamping forming, in particular to a hot stamping forming process for preparing an actuating cylinder of a driving belt wheel for a vehicle.
Background
The hot stamping technology is a kind of part processing mode, using the principle of metal thermoplastic forming, firstly heating the blank to a certain temperature, then using a punching machine to punch in a corresponding die and maintaining pressure and quenching, so as to obtain the required shape and simultaneously realize the phase change of the metal material. The hot forming process can improve the internal organization structure of the metal after the sheet material is subjected to plastic deformation on the premise of low material consumption, the strength of a stamping part is improved, and the part has light weight and good rigidity; the forming at high temperature almost has no springback, obtains higher dimensional accuracy, has uniform and consistent size with a module and has better interchangeability. The general assembly and use requirements can be met without further machining; in the stamping process, the surface of the material is not damaged, the material has better surface quality, is smooth and beautiful, and provides convenient conditions for subsequent surface treatment procedures such as surface painting, electroplating, phosphating and the like.
The method is characterized in that a casting process is adopted for parts such as an execution cylinder of the driving pulley in the automobile, the casting process causes poor mechanical property, thick material structure, unstable performance and more defects of the parts, and the casting process has complex influencing factors and more working procedures and is more labor-intensive for workers, so the method is only suitable for single-piece or small-batch production in industry.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a hot stamping forming process for a plate, which is mainly used for hot forming production of an actuating cylinder of a driving pulley in an automobile and solves the problems in the background art.
The invention is realized by adopting the following technical scheme:
a hot forming process for preparing an actuating cylinder of a vehicle driving belt wheel comprises the following steps;
(1) preparing a male die, a conical blank holder and a female die according to the size of an actuating cylinder of the driving belt wheel for the vehicle;
(2) mounting a male die on an upper fixing plate of a drawing slide block by adopting a double-action press, mounting a conical blank holder on a blank holder slide block, and mounting a female die on a lower fixing plate;
(3) and blanking: putting the plate on a blanking die for blanking, and cleaning the blanked blank with oil stain or dust;
(4) and heating: placing the cleaned plate in a heating furnace, heating to an austenite state and preserving heat;
(5) preforming: after being heated, the plate is quickly transferred to a female die of a thermal forming die, and a blank holder sliding block drives a conical blank holder to tightly press the plate for preforming;
(6) forming; after preforming, the drawing slide block drives a male die to press downwards for forming, and the edge of the plate or the semi-finished product is formed into a vertical edge along a curve;
(7) and punching: putting the material into a flanging and punching die for flanging and punching;
(8) and (3) heat treatment: heat treating the thermoformed piece;
(9) and trimming and shaping: and (4) placing the material on a trimming die for trimming, and placing the material in a shaping die for shaping.
The process adopts a secondary hot forming mode to produce the driving pulley execution cylinder of the traditional casting processing. The hot-forming plate is made of 16MnCr5, 40CrH and other materials.
Compared with the traditional casting technology, the invention has the following advantages:
1. the stamping forming can improve the internal organization structure of the metal and the strength of the stamping part after the sheet material is plastically deformed on the premise of low material consumption, and the part has light weight and good rigidity.
2. The forming at high temperature almost has no springback, obtains higher dimensional accuracy, has uniform and consistent size with a module and has better interchangeability.
3. The general assembly and use requirements can be met without further machining.
4. In the stamping process, the surface of the material is not damaged, the material has better surface quality, is smooth and beautiful, and provides convenient conditions for subsequent surface treatment procedures such as surface painting, electroplating, phosphating and the like.
5. Compared with one-step forming, the method increases a preforming process, relieves uneven metal flow caused by severe deformation of the plate, reduces the ultimate drawing coefficient, can increase the total deformation of a formed part to a certain extent, and reduces the load requirement on the press.
The invention has reasonable design, simple process steps, easy realization of mechanization and automation, suitability for mass production and good practical application and popularization value.
Drawings
Fig. 1 shows a three-dimensional schematic view of secondary forming.
Fig. 2 shows a schematic view of the secondary forming process.
Figure 3 shows a front view of a part prepared according to the invention.
Figure 4 shows a front view of the apparatus according to the invention.
Fig. 5 shows a left side view of the apparatus of the present invention.
In the figure: 1-male die, 2-conical blank holder, 3-part, 4-female die, 5-guide post, 6-guide sleeve, 7-upper fixing plate, 8-upper backing plate, 9-upper die holder, 10-deep drawing slide block, 11-blank holder slide block, 12-lower fixing plate, 13-lower backing plate, 14-lower die holder, and 15-movable workbench.
Detailed Description
In order to make the basic principles, main features and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below.
A stamping process for preparing an actuating cylinder of a driving pulley for a vehicle comprises the following steps:
(a) and preparing a male die 1, a conical blank holder 2 and a female die 4 according to the size of the actuating cylinder of the driving belt wheel for the vehicle.
(b) The male die 1 is arranged on an upper fixing plate 7 of a drawing slide block 10, the conical blank holder 2 is arranged on a blank holder slide block 11, and the female die 4 is arranged on a lower fixing plate 12 by adopting a double-action press.
(c) And blanking: and (3) blanking the plate on a blanking die, and cleaning oil stains or dust on the blanked blank.
(d) And heating: and (4) placing the cleaned plate in a heating furnace, heating to an austenite state and preserving heat.
(e) Preforming: after being heated, the plate is quickly transferred to a female die of a thermal forming die, and the blank pressing slide block drives the conical blank pressing ring to tightly press the plate for preforming.
(f) Forming; and after preforming, the drawing slide block drives the male die to press downwards for forming, and the edge of the plate or the semi-finished product is formed into a vertical edge along a certain curve according to a certain curvature.
(g) And punching: and (3) placing the material into a flanging and punching die for flanging and punching.
(h) And (3) heat treatment: and (3) carrying out heat treatment on the hot-formed piece to improve the structure and mechanical property of the hot-formed piece.
(i) And trimming and shaping: and placing the material on a trimming die for trimming, and placing the material on a shaping die for shaping, so that the dimensional accuracy of the formed part is improved.
The process adopts a secondary thermal forming mode to produce the vehicle driving pulley execution cylinder, when in implementation, a hot stamping die is arranged on a double-acting press, a male die 1 is arranged on a deep drawing slide block 10, and a conical blank holder 2 is arranged on a blank holder slide block 11, so that the blank holder slide block and the deep drawing slide block can move simultaneously; specifically, the hot stamping die in the preforming process comprises a guide pillar 5, a guide sleeve 6, an upper fixing plate 7, a male die 1, an upper padding plate 8, an upper die base 9, a deep drawing slider 10, a blank pressing slider 11, a conical blank pressing ring 2, a female die 4, a lower fixing plate 12, a lower padding plate 13, a lower die base 14 and a movable workbench 15, wherein the lower die base 14 is arranged above the movable workbench 15; the guide sleeve 6 is arranged below the upper die holder 9; the guide post 5 is arranged above the lower die base 14; the guide post 5 is nested into a round hole of the guide sleeve 6, and the guide sleeve 6 can travel for a certain distance along the guide post 5 to ensure the involution of the male die 1 and the female die 4; the lower backing plate 13 is fixed on the lower die holder 14, and the lower fixing plate 12 and the female die 4 are sequentially fixed on the lower backing plate 13; the tapered blank holder 2 is arranged on the blank holder sliding block 11, two round holes are formed in the blank holder sliding block 11, the guide pillar 5 penetrates through the round holes to ensure that the tapered blank holder 2 and the female die 4 are closed, and the blank holder sliding block 11 drives the tapered blank holder 2 to fixedly press the plate on the female die 4 and enable the plate to be preliminarily formed. The deformation of the blank caused by the conical blank holder 2 is equivalent to finishing a drawing process to a certain extent, and the ultimate drawing coefficient can be reduced to a very small value, even 0.35. The upper die holder 9 is arranged below the drawing slide block 10; the upper backing plate 8 is arranged below the upper die holder 9; the upper fixing plate 7 is arranged on the upper backing plate 8, and the upper fixing plate 7 is provided with a circular threaded hole; the male die 1 is installed below the upper fixing plate 7 through threads, and the drawing slide block 10 drives the male die 1 to descend on the basis of preforming and continuously cooperate with the female die 4 to perform hot stamping forming on a plate. After the drawing is finished, the drawing slide block 10 rises, the movable workbench 15 descends, and the workpiece is ejected out of the female die 4 by the ejecting device and is convenient to take out.
The driving pulley actuator cylinder shown in fig. 3 is prepared below using a 40CrH material as an example, as follows:
i, selecting a 40CrH plate with the thickness of 6mm as a material, wherein the thickness of a formed piece is 5.5mm, the machining allowance is 0.5mm, and blanking by a blanking die to obtain a circular plate with the diameter of 240 mm.
And II, cleaning the surface of the round plate by using an acetone solution, then placing the round plate in a heating furnace, heating the round plate to an austenite state, and preserving heat.
III, rapidly transferring the plate material between the conical blank holder 2 and the female die 4 of the double-acting press, pressing the plate material on the female die 4 by the conical blank holder 2 for preforming, and enabling the male die 1 to downwards cooperate with the female die 4 to complete secondary forming.
And IV, respectively transferring the formed parts to a punching die for punching.
V, quenching and tempering heat treatment of the formed piece: firstly, quenching: oil quenching after 860 ℃ to warm, and then tempering: keeping the temperature at 560 ℃ for 60 minutes and then cooling in air.
And VI, shaping the trimming and shaping die to improve the dimensional accuracy of the formed part.
The hot stamping forming process is used for processing the actuating cylinder of the driving belt wheel, so that the internal organization structure of the metal can be improved, and the strength is improved. Because the forming at high temperature almost has no springback, the high dimensional accuracy can be obtained, and the interchangeability is good. Meanwhile, the secondary forming relieves the uneven metal flow caused by the severe deformation of the plate formed in the primary forming, reduces the ultimate drawing coefficient, can increase the total deformation of the formed piece to a certain extent, and reduces the load requirement on the press.
The process provided by the invention adopts various measures aiming at the defects, so that the problems of thick material structure, unstable part performance, more defects and the like caused by the traditional casting method for manufacturing the actuating cylinder of the driving pulley are avoided, and the part with smooth surface and stable dimensional precision can be obtained.
The above description is only for the specific embodiments 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 of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (3)
1. A hot stamping forming process for preparing an actuating cylinder of a driving pulley for a vehicle is characterized by comprising the following steps of: the method comprises the following steps:
(1) preparing a male die, a conical blank holder and a female die according to the size of an actuating cylinder of the driving belt wheel for the vehicle;
(2) mounting a male die on an upper fixing plate of a drawing slide block by adopting a double-action press, mounting a conical blank holder on a blank holder slide block, and mounting a female die on a lower fixing plate;
(3) and blanking: putting the plate on a blanking die for blanking, and cleaning the blanked blank with oil stain or dust;
(4) and heating: placing the cleaned plate in a heating furnace, heating to an austenite state and preserving heat;
(5) preforming: after being heated, the plate is quickly transferred to a female die of a thermal forming die, and a blank holder sliding block drives a conical blank holder to tightly press the plate for preforming;
(6) forming; after preforming, the drawing slide block drives a male die to press downwards for forming, and the edge of the plate or the semi-finished product is formed into a vertical edge along a curve;
(7) and punching: putting the material into a flanging and punching die for flanging and punching;
(8) and (3) heat treatment: heat treating the thermoformed piece;
(9) and trimming and shaping: and (4) placing the material on a trimming die for trimming, and placing the material in a shaping die for shaping.
2. The hot press forming process of claim 1, wherein: the material of the plate for hot forming is 16MnCr5 or 40 CrH.
3. The hot press forming process of claim 1, wherein: in the step (8), the formed piece is subjected to heat treatment: firstly, quenching: oil quenching after 860 ℃ to warm, and then tempering: keeping the temperature at 560 ℃ for 60 minutes and then cooling in air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910835950.9A CN110586756B (en) | 2019-09-05 | 2019-09-05 | Hot stamping forming process for preparing vehicle driving pulley execution cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910835950.9A CN110586756B (en) | 2019-09-05 | 2019-09-05 | Hot stamping forming process for preparing vehicle driving pulley execution cylinder |
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| CN110586756A true CN110586756A (en) | 2019-12-20 |
| CN110586756B CN110586756B (en) | 2021-03-30 |
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| CN201910835950.9A Active CN110586756B (en) | 2019-09-05 | 2019-09-05 | Hot stamping forming process for preparing vehicle driving pulley execution cylinder |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111147985A (en) * | 2020-01-16 | 2020-05-12 | 广州市迈致电子科技有限公司 | Horn base and stamping process thereof |
| CN111672955A (en) * | 2020-06-09 | 2020-09-18 | 首钢集团有限公司 | Hot stamping process for improving strength of hot stamping axle housing steel finished product |
| CN112756464A (en) * | 2020-12-18 | 2021-05-07 | 太原理工大学 | Plate thermal drawing/bulging performance testing device based on universal testing machine |
| CN113319534A (en) * | 2021-06-09 | 2021-08-31 | 四川航天长征装备制造有限公司 | Technological method for top cover convex hole |
| CN114535486A (en) * | 2022-03-18 | 2022-05-27 | 湘潭大学 | Forging forming method and die for shell part plates with different thicknesses |
| CN115041593A (en) * | 2022-08-16 | 2022-09-13 | 保定众意达机械制造有限公司 | Forming die and forming process for lower supporting plate of middle channel of automobile |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007319912A (en) * | 2006-06-02 | 2007-12-13 | Mazda Motor Corp | Device for punching hole and method for punching hole using the same device |
| CN103357734A (en) * | 2013-07-16 | 2013-10-23 | 上海梅山钢铁股份有限公司 | Taper blank-holding and deep-drawing stamping method |
| CN104084479A (en) * | 2014-06-24 | 2014-10-08 | 梧州恒声电子科技有限公司 | Process for stretching press forming of basin frame |
| CN105107939A (en) * | 2015-09-18 | 2015-12-02 | 武汉理工大学 | Continuous hot stamping device and technology |
| CN205289444U (en) * | 2015-11-25 | 2016-06-08 | 张家港市新亨通机械制造有限公司 | Hydraulic tank inferior valve deep -drawing mould |
| JP5982560B2 (en) * | 2013-04-02 | 2016-08-31 | 株式会社キーレックス | Press machine |
| CN107150092A (en) * | 2017-07-21 | 2017-09-12 | 无锡市中捷减震器有限公司 | A kind of processing technology of belt pulley |
-
2019
- 2019-09-05 CN CN201910835950.9A patent/CN110586756B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007319912A (en) * | 2006-06-02 | 2007-12-13 | Mazda Motor Corp | Device for punching hole and method for punching hole using the same device |
| JP5982560B2 (en) * | 2013-04-02 | 2016-08-31 | 株式会社キーレックス | Press machine |
| CN103357734A (en) * | 2013-07-16 | 2013-10-23 | 上海梅山钢铁股份有限公司 | Taper blank-holding and deep-drawing stamping method |
| CN104084479A (en) * | 2014-06-24 | 2014-10-08 | 梧州恒声电子科技有限公司 | Process for stretching press forming of basin frame |
| CN105107939A (en) * | 2015-09-18 | 2015-12-02 | 武汉理工大学 | Continuous hot stamping device and technology |
| CN205289444U (en) * | 2015-11-25 | 2016-06-08 | 张家港市新亨通机械制造有限公司 | Hydraulic tank inferior valve deep -drawing mould |
| CN107150092A (en) * | 2017-07-21 | 2017-09-12 | 无锡市中捷减震器有限公司 | A kind of processing technology of belt pulley |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111147985A (en) * | 2020-01-16 | 2020-05-12 | 广州市迈致电子科技有限公司 | Horn base and stamping process thereof |
| CN111672955A (en) * | 2020-06-09 | 2020-09-18 | 首钢集团有限公司 | Hot stamping process for improving strength of hot stamping axle housing steel finished product |
| CN111672955B (en) * | 2020-06-09 | 2022-05-17 | 首钢集团有限公司 | Hot stamping process for improving strength of hot stamping axle housing steel finished product |
| CN112756464A (en) * | 2020-12-18 | 2021-05-07 | 太原理工大学 | Plate thermal drawing/bulging performance testing device based on universal testing machine |
| CN113319534A (en) * | 2021-06-09 | 2021-08-31 | 四川航天长征装备制造有限公司 | Technological method for top cover convex hole |
| CN114535486A (en) * | 2022-03-18 | 2022-05-27 | 湘潭大学 | Forging forming method and die for shell part plates with different thicknesses |
| CN114535486B (en) * | 2022-03-18 | 2024-03-05 | 湘潭大学 | Forging forming method and die for unequal-thickness shell piece plate |
| CN115041593A (en) * | 2022-08-16 | 2022-09-13 | 保定众意达机械制造有限公司 | Forming die and forming process for lower supporting plate of middle channel of automobile |
| CN115041593B (en) * | 2022-08-16 | 2022-10-28 | 保定众意达机械制造有限公司 | Forming die and forming process for lower supporting plate of middle channel of automobile |
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