CN102489592B - Single working step extruding method for machining full-bright region inner hole - Google Patents
Single working step extruding method for machining full-bright region inner hole Download PDFInfo
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- CN102489592B CN102489592B CN201110391706.1A CN201110391706A CN102489592B CN 102489592 B CN102489592 B CN 102489592B CN 201110391706 A CN201110391706 A CN 201110391706A CN 102489592 B CN102489592 B CN 102489592B
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Abstract
The invention relates to a single working step extruding method for machining a full-bright region inner hole, belonging to the technical field of metal finishing. The single working step extruding method comprises the following steps of: respectively placing a plate to be machined and an auxiliary base plate at a convex mold side and a concave mold side on a double-acting pressure machine, firstly locating the plate to be machined through a blank holder arranged at the convex mold side, then using the double-acting pressure machine for driving a convex mold to sequentially press the plate to be machined into the auxiliary base plate and a concave mold hole arranged in a concave mold, leading the plate to be machined to be always in a three-dimensional pressure stress state under the pressure action of the auxiliary base plate, and finally realizing the single working step extrusion when the pressing volume of the convex mold exceeds the thickness of the plate to be machined, extruded materials completely break away from the plate to be machined. The process can be finished by using only one double-acting pressure machine through single working-step, and therefore, the production efficiency is improved, and the limitation of high centering degree of a mold is improved, the machining and manufacturing of the full-bright region inner hole of a medium plate or thick metal plate material is realized while the cost of the mold is reduced, and the quality of the product is ensured.
Description
Technical field
What the present invention relates to is the method in a kind of metalworking technology field, specifically a kind of under double action press by subbolster, single work step is realized the pressing method of the full euphotic belt endoporus processing of centering thick sheet metal or thick sheet metal material.
Background technology
In modern manufacturing industry, especially automobile and other industries, exist in a large number by the part of thick sheet metal and thick sheet metal figuration manufacture, these parts are mainly used in the higher parts of security requirement such as transmission system, brakes, and the cross section quality of part is had to very high requirement.It is full euphotic belt that many parts require section, in order to avoid in use there is local corrosion and fatigue fracture.For this type of part, generally adopt two kinds of processing methods, a kind of is fine-edge blanking method, another kind is the refine method of section.
Fine-edge blanking method refers to by adopting 3 motor presses outside blanking pressure and pressure-pad-force, increase again a buffer brake, make deformed region in three-dimensional compressive stress state, thereby realize the processing of full euphotic belt, the advantage of the method is that production efficiency is high, dimensional accuracy is high, except deburring, product can come into operation without follow-up machined.According to < < high-strength steel slab stamping-out research > > (Huang Shaodong, Zhao Zhixiang, Fu Yun, forging technology, 2010,35 (3): 34-37), this technology has certain limitation, that is: workpiece material generally need to carry out specially treated, to have higher ductility; Forcing press must possess three moving functions, and principal pressure, pressure-pad-force and anti-top power can be provided respectively; Die cost is high, and punch and matrix gap is little, and when load over centre appears in mould, punch, die are subject to side force damage.
The another kind method refine method of section also can be carried out full euphotic belt processing, the method is first size to be put to a micro-processing capacity, carry out common stamping, and then carry out refine operation one, surplus is wiped off, and because the amount of refine is very little, separated two parts volume differs huge, a less part departs from parent, survivable cross section quality with the form flexural deformation of cutting.According to < <, improve fine-edge blanking cross section quality pre-test > > (Zhou Yousong, Xiong Ying, machine tender's (cold working), 2007,9:53-54.), the advantage of the method is that equipment needed thereby is simple, easy to operate, but still there is following limitation: needing increases production process, and production efficiency is not high; It is high that punch and matrix centering requires, otherwise refine operation can not complete, and causes die cost to improve; Common stamping operation is difficult to accomplish that allowance is consistent everywhere, brings difficulty to refine operation, sometimes needs multistep refine, and procedure of processing is loaded down with trivial details.
In view of there is each side limitation in existing manufacturing procedure, especially there is punch, die centering requires high common limitation, in actual production, there is certain difficulty in the endoporus processing of full euphotic belt.
Summary of the invention
The present invention is directed to prior art above shortcomings, a kind of single work step pressing method of full euphotic belt endoporus processing is provided, this technique only needs double action press, single work step just can complete, and has improved production efficiency; Meanwhile, improve the high limitation of alignment degree of mould, when reducing die cost, realized the full euphotic belt endoporus processing and manufacturing of centering thick sheet metal or thick sheet metal material, products quality guarantee.
The present invention is achieved by the following technical solutions, the method of the invention is placed on respectively punch side and the die side on double action press by plate to be processed and subbolster, and after first locating by the blank holder of punch side, by double action press, drive punch that plate to be processed is pressed into subbolster and the die hole that is positioned at die successively, under the pressure-acting of subbolster, realize plate to be processed all the time in three-dimensional compressive stress state, finally when punch drafts surpasses the thickness of plate to be processed, extruded material departs from plate to be processed completely, realize single work step extruding.
The diameter nominal size of described punch is consistent with interior hole characteristic nominal size.
The diameter of described die is 0.5～0.8 times of diameter of punch, and blank holder and punch are slidably matched.
The material of described subbolster is identical with plate to be processed and thickness is plate to be processed 0.3～0.5 times, the effective diameter of this subbolster is more than or equal to 2 times of convex mould diameter simultaneously.
With respect to prior art, the present invention can effectively carry out endoporus processing under lower cost, and the equipment of use is comparatively simple and easy, installs simple and conveniently, and the bore profile of producing part presents full euphotic belt, and product quality is high; Only need single work step just can complete, production efficiency is high; Can also solve in existing method and require high this to be difficult to the requirement realizing to punch, die centering, die cost should have reduction by a relatively large margin mutually.
Accompanying drawing explanation
Fig. 1 is the structural representation after each parts of the present invention install.
Fig. 2 is work flow of the present invention and principle schematic.
Fig. 3 is the three-dimensional compressive stress district schematic diagram in process.
Fig. 4 is the part photo after processing.
Fig. 5 is that the part after processing carries out line cutting and 1/4th section euphotic belt photos.
Fig. 6 is part section under 200 power microscopes and the comparison diagram of common stamping part section.
The specific embodiment
Below embodiments of the invention are elaborated, the present embodiment is implemented take technical solution of the present invention under prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
As shown in Figure 1, the die device adopting in the present embodiment comprises: punch 1, blank holder 2, die 3, plate to be processed 4 and subbolster 5, wherein: diel consists of punch 1, blank holder 2 and die 3 and the mould bases not marking in Fig. 1 and other supplementary structure.
The present embodiment convex mould 1 and blank holder 2 are arranged on upside, and die 3 is arranged on downside.Plate 4 to be processed is placed on to mold center, and subbolster 5 is placed on die one side, is placed on the downside of plate 4 to be processed, and it is basically identical that the center of the center of subbolster 5 and die hole 6 keeps.Installment work before processing is complete.
Add man-hour, the fit system of diel and forcing press as shown in Figure 2.Secondary cylinder coordinates with blank holder 2, first depresses, and blank holder 2 and plate 4 to be processed and plate to be processed 4 are fully compressed with subbolster 5.Master cylinder coordinates with punch 1, depresses subsequently, and punch 1 is pressed into plate 4 to be processed.The material of plate 4 to be processed is forced to be pressed into backing plate 5, forces the material of backing plate 5 to move down.Because die 3 coordinates load with support platform, cannot move down, the material of backing plate 5 is just pressed into die hole 6.
As shown in Figure 3, in punch 1 is subject to process that master cylinder pressure continues to depress, because the diameter of die hole 6 is less than convex mould diameter, the resistance that the material of backing plate 5 flows into die hole 6 is very large.In addition blank holder 2 is subject to secondary cylinder pressure by paracentral region, to apply very large pressure to plate 4 to be processed and backing plate 5, makes in material flow process, and the strong three-dimensional compressive stress of plate to be processed district 7 has appearred in part.After processing, material shear surface 8 to be processed is just among the strong three-dimensional compressive stress of plate to be processed district 7, and near the ductility of material material shear surface 8 to be processed is good, is difficult for occurring crackle.This has just created adequate condition to the generation of euphotic belt.When punch 1, continue to depress until be pressed into after backing plate 5, process is complete, material 4 to be processed the is processed endoporus of a full euphotic belt, has completed the backing plate extrusion process of the full euphotic belt processing of single work step endoporus of carrying out middle thick sheet metal or thick sheet metal on double action press.
As shown in Figure 5, adopt the present invention can improve the harsh working condition of former technique, thereby significantly reduce costs.Part after processing, through line cutting process, can clearly find out that tangent plane 8 is that bore area presents full euphotic belt.Tangent plane euphotic belt amplifies the configuration of surface of 200 times under the microscope as shown in Fig. 6 (left side), presents some regular parallel lines stripeds.And the surface of common stamping part section is rough and uneven in surface, amplify equally 200 times of rear surface forms as shown in Fig. 6 (right side).Both compare, and this euphotic belt fineness is apparently higher than the section of common stamping as seen.Thereby verified the feasibility of the method.
Claims (3)
1. single work step pressing method of a full euphotic belt endoporus processing, it is characterized in that, plate to be processed and subbolster are placed on respectively to punch side and the die side on double action press, and after first locating by the blank holder of punch side, by double action press, drive punch that plate to be processed is pressed into subbolster and the die hole that is positioned at die successively, under the pressure-acting of subbolster, realize plate to be processed all the time in three-dimensional compressive stress state, finally when punch drafts surpasses the thickness of plate to be processed, extruded material departs from plate to be processed completely, realize single work step extruding,
The material of described subbolster is identical with plate to be processed and thickness is plate to be processed 0.3
~0.5 times;
The effective diameter of described subbolster is more than or equal to 2 times of convex mould diameter.
2. method according to claim 1, is characterized in that, the diameter nominal size of described punch is consistent with interior hole characteristic nominal size.
3. method according to claim 1, is characterized in that, 0.5 of the diameter that the diameter of described die hole is punch
~0.8 times, blank holder and punch are slidably matched.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110391706.1A CN102489592B (en) | 2011-11-30 | 2011-11-30 | Single working step extruding method for machining full-bright region inner hole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110391706.1A CN102489592B (en) | 2011-11-30 | 2011-11-30 | Single working step extruding method for machining full-bright region inner hole |
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| Publication Number | Publication Date |
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| CN102489592A CN102489592A (en) | 2012-06-13 |
| CN102489592B true CN102489592B (en) | 2014-04-16 |
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| CN201110391706.1A Active CN102489592B (en) | 2011-11-30 | 2011-11-30 | Single working step extruding method for machining full-bright region inner hole |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114473387A (en) * | 2022-02-25 | 2022-05-13 | 蔚来汽车科技(安徽)有限公司 | Method for machining section of plate for automobile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2721273Y (en) * | 2004-05-25 | 2005-08-31 | 河南新飞电器有限公司 | Double-directional blanking mould |
| CN101138777A (en) * | 2007-09-24 | 2008-03-12 | 青岛征和工业有限公司 | Accurate part finish blanking method and blanking mold thereof |
| CN101332482A (en) * | 2007-06-25 | 2008-12-31 | 精工爱普生株式会社 | Pressing method, punching plate, and liquid ejecting head |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009142837A (en) * | 2007-12-12 | 2009-07-02 | Nippon Steel Corp | Punching apparatus and punching method excellent in fatigue strength of metal plate punched part |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2721273Y (en) * | 2004-05-25 | 2005-08-31 | 河南新飞电器有限公司 | Double-directional blanking mould |
| CN101332482A (en) * | 2007-06-25 | 2008-12-31 | 精工爱普生株式会社 | Pressing method, punching plate, and liquid ejecting head |
| CN101138777A (en) * | 2007-09-24 | 2008-03-12 | 青岛征和工业有限公司 | Accurate part finish blanking method and blanking mold thereof |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2009-142837A 2009.07.02 |
| 增设附加凹模的简易精冲工艺与模具研究;段维峰等;《锻压装备与制造技术》;20040630(第3期);第2节至第3节，图2 * |
| 段维峰等.增设附加凹模的简易精冲工艺与模具研究.《锻压装备与制造技术》.2004,(第3期),第2节至第3节，图2. |
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