CN103611868A - Cold forging die for forging center holes of T iron - Google Patents
Cold forging die for forging center holes of T iron Download PDFInfo
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- CN103611868A CN103611868A CN201310576241.6A CN201310576241A CN103611868A CN 103611868 A CN103611868 A CN 103611868A CN 201310576241 A CN201310576241 A CN 201310576241A CN 103611868 A CN103611868 A CN 103611868A
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Abstract
The invention relates to the technical field of dies, and discloses a cold forging die for forging center holes of T iron. The cold forging die comprises an upper die and a lower die, wherein the upper die is provided with an upper die cavity; the lower die is provided with a lower die cavity; an upper die cavity pressing block is arranged in the upper die cavity of the upper die; a lower die cavity pressing block is arranged in the lower die cavity of the lower die; an ejector pin capable of vertically moving is also arranged in the lower die cavity pressing block; a blank is arranged between the upper die cavity pressing block and the lower die cavity pressing block; accommodating space is formed in the blank; and redundant materials are accommodated in the accommodating space in a cold precision forging process when the upper die moves relative to the lower die. Because the cold forging die is provided with the accommodating space, the redundant materials of cold forging can be distributed; on the one hand, pressure stability in a cavity during cold forging is guaranteed, the dimensional accuracy is improved, and the service life of the die is prolonged; and on the other hand, consumption of materials is reduced, a work procedure of machining a magnetic core and a plate surface of the blank after cold precision forging is also omitted, the production efficiency is greatly improved, and the economic benefit is high.
Description
Technical field
The present invention relates to technical field of mold, more particularly, particularly a kind of forging mesopore cold forging die of T iron.
Background technology
T ferromagnetic core is the Hardware fitting of electroacoustic trumpet, because of core shapes similar to capitalization English letter T word, therefore claim T iron.Early stage T iron is many to be formed by rear plate and magnetic core riveted, is called split type T iron.Along with the development of cold-heading technology and the maturation of alramenting saponification technology, modern T iron mostly is the structure of true integral type.Its advantage is: feed consumption is few, and stock utilization reaches more than 90%, can realize without turning processing, and cost is low, and good manufacturability, precision is high, and tonequality is stable etc.
The post core of huge pillar core T iron is larger, and thickness of slab is thicker, and post core multi-band has mesopore to alleviate the weight of self.Most huge pillar core T iron weight are all more than 1 kilogram, adopt the mode of cold heading technique (30 ℃ of following normal temperature) to produce can to reduce loss and the minimizing machine of approximately 30% material to add surplus, and the product even having can be without complete without machined; But if adopt thermal forging technology (being heated to more than 830 ℃) because of thermal deformation and surface high-temp oxidation, the product of producing all will carry out machined, cold-forging technique has increased a large amount of machined expenses relatively, so the expense that the mode of T iron general employing cold-heading when designing and developing reduces production costs.
And because the product weight of huge pillar core T iron is larger, larger at saw material link blanking deviation of weight, the while because annealing hardness has deviation, causes the shape obtaining under same pressure environment to have deviation in annealing process.
The feature of T iron is that the required precision of post core is very high, above has back of the body convex closure, and there is groove at post root place.Post core place has mould just to form the local existing picture of envelope that closes like this, and the deviation of and hardness heavy due to material.Under same pressure environment, as material unnecessary in shape chamber, cannot shunt, can cause the bursting apart of unstable or mould of dimensional accuracy.
The production technology of existing T iron comprises: the sliding ?of saw material ?spray sand ?phosphatization saponification profit press a ?move back the sliding ?of fiery ?spray sand ?phosphatization saponification profit press flat ?move back the sliding ?one-tenth of fiery ?spray sand ?phosphatization saponification profit type ?car outward round ?bore in the perverse ?electricity of hole ?cleaning hair plating ?packing.And for above-mentioned problem, in prior art, the main method adopting is: after (moulding process) cold-heading, the method for Vehicle Processing center pillar guarantees the dimensional accuracy of product, the shortcoming of doing is like this: material deterioration inside is many, mach expense is also very high, and because material unnecessary in shape chamber cannot be shunted, build-up of pressure unstable, also to having a great impact die life.Therefore, need to seek a kind of new cold forging die and solve the problems referred to above.
Summary of the invention
The object of the present invention is to provide and a kind ofly reduce spillage of material, make Die pressure stability and can extend the forging mesopore cold forging die of the T iron of die life.
In order to achieve the above object, the technical solution used in the present invention is as follows:
A kind of forging mesopore cold forging die of T iron, comprise the patrix that is provided with upper cavity and the counterdie that is provided with lower mode cavity, upper cavity briquetting is installed in the upper cavity of described patrix, lower mode cavity briquetting is installed in the lower mode cavity of described counterdie, in described lower mode cavity briquetting, be also provided with thimble moving up and down, between described upper cavity briquetting and lower mode cavity briquetting, be provided with blank, described blank is provided with accommodation space, and this accommodation space is for accommodating unnecessary material at patrix with respect to the cold closed-die forging process of counterdie motion.
Preferably, described accommodation space is the tap hole of being located at the end of blank.
Preferably, the top of described thimble is also provided with the jacking block corresponding with the tap hole of described blank end.
Preferably, the first drive unit that drives this patrix to move up and down is also installed on described patrix, on described counterdie, is also provided with the second drive unit that drives described thimble to move up and down.
Preferably, the cross sectional shape of described tap hole is circular.
Compared with prior art, the invention has the advantages that: on the blank of the present invention between upper die and lower die, be provided with the accommodation space of accommodating material unnecessary in blank cold closed-die forging process, can make the unnecessary material of cold forging realize shunting, on the one hand, guaranteed the pressure stability in shape chamber in cold forging, improved dimensional accuracy, extended the service life of mould, on the other hand, reduced the consume of material, also omitted simultaneously and after cold closed-die forging, needed the magnetic core of blank and plate face to carry out mach operation, greatly improved production efficiency, there is very high economic benefit.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the structure chart of the forging mesopore cold forging die of T iron of the present invention.
Fig. 2 is the structure chart of the blank matrix that adopts in the forging mesopore cold forging die of T iron of the present invention.
Description of reference numerals: 1, patrix, 2, upper cavity briquetting, 3, T ironworker's part, 4, counterdie, 5, lower mode cavity briquetting, 6, tap hole, 7, thimble, 8, blank.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Consult shown in Fig. 1, the forging mesopore cold forging die of a kind of T iron provided by the invention, comprise the patrix 1 that is provided with upper cavity and the counterdie 4 that is provided with lower mode cavity, in the upper cavity of described patrix 1, upper cavity briquetting 2 is installed, in the lower mode cavity of described counterdie 4, lower mode cavity briquetting 5 is installed, in described lower mode cavity briquetting 5, be also provided with thimble 7 moving up and down, between described upper cavity briquetting 2 and lower mode cavity briquetting 5, be provided with blank 8, described blank 8 is provided with accommodation space, this accommodation space is for accommodating unnecessary material at patrix 1 with respect to the cold closed-die forging process of counterdie 4 motions.
Concrete, to consult shown in Fig. 2, described accommodation space is the tap hole 6 of being located at the end of blank 8, the cross sectional shape of described tap hole 6 is circular, or other shapes all do not affect enforcement of the present invention.
And, at the top of thimble 7, be also provided with the jacking block corresponding with the tap hole 6 of described blank 8 ends, can adopt like this jacking block of thimble 7 to squeeze out tap hole 6 in the end of blank 8.As preferably, the present invention is also also provided with the first drive unit that drives this patrix 1 to move up and down on described patrix 1, is also provided with the second drive unit that drives described thimble 7 to move up and down on described counterdie 4; The first described drive unit and the second drive unit can be fluid pressure drive device or other drive units.
Concrete, below by computer simulation, the scheme that is not provided with tap hole with prior art that is provided with tap hole in the present invention is compared, simulation steps specifically comprises: first, adopt three-dimensional graphics software (as PRO/E) draw as described in the 3D sterogram of blank 8 and mould, magnetic core end at described blank 8 is provided with tap hole 6, and saves as TSL form; Then, the 3D sterogram of the blank of above-mentioned TSL form and mould is imported after Deform3D software, generating mesh, then adopt cold forging mode to forge after geometrical model and primary condition are set.Wherein, the geometrical model of described blank is No. 10 steel, and the geometrical model of described mould is rigidity, and described blank and the coefficient of friction of mould are 0.13, and the patrix translational speed of described mould is 220 mm/second.
Do not have the grid tangent plane blank of tap hole to flow and when mould stress curve analyzes, the filling pressure line of force is poly-in its stress curve shape chamber so rises.Walk to expect that difficulty has retardance, forging process is unreasonable, and unnecessary material cannot be shunted, and particularly pressure curve is suddenly and approaches an angle of 90 degrees and rise, and easily causes the unstable and mould of size to burst apart.
And when the grid tangent plane blank that has tap hole flows and mould stress curve analyzes, the filling pressure line of force is gentle in its stress curve shape chamber rises, to walk to expect brisk, forging process is reasonable, and unnecessary material is assembled to tap hole.
After adopting mould of the present invention, its advantage is: on the blank of the present invention between upper die and lower die, be provided with the accommodation space of accommodating material unnecessary in blank cold closed-die forging process, can make the unnecessary material of cold forging realize shunting, on the one hand, guaranteed the pressure stability in shape chamber in cold forging, improved dimensional accuracy, extended the service life of mould, on the other hand, reduced the consume of material, also omitted simultaneously and after cold closed-die forging, needed the magnetic core of blank and plate face to carry out mach operation, greatly improved production efficiency, there is very high economic benefit.
Although described by reference to the accompanying drawings embodiments of the present invention; but the patent owner can make various distortion or modification within the scope of the appended claims; as long as be no more than the described protection domain of claim of the present invention, all should be within protection scope of the present invention.
Claims (5)
1. the forging mesopore cold forging die of a T iron, comprise the patrix (1) that is provided with upper cavity and the counterdie (4) that is provided with lower mode cavity, upper cavity briquetting (2) is installed in the upper cavity of described patrix (1), lower mode cavity briquetting (5) is installed in the lower mode cavity of described counterdie (4), it is characterized in that: in described lower mode cavity briquetting (5), be also provided with thimble moving up and down (7), between described upper cavity briquetting (2) and lower mode cavity briquetting (5), be provided with blank (8), described blank (8) is provided with accommodation space, this accommodation space is for accommodating unnecessary material at patrix (1) with respect to the cold closed-die forging process of counterdie (4) motion.
2. the forging mesopore cold forging die of T iron according to claim 1, is characterized in that: described accommodation space is for being located at the tap hole (6) of the end of blank (8).
3. the forging mesopore cold forging die of T iron according to claim 2, is characterized in that: the top of described thimble (7) is also provided with the jacking block corresponding with the tap hole (6) of described blank (8) end.
4. according to the forging mesopore cold forging die of the T iron described in claim 1～3 any one, it is characterized in that: the first drive unit that drives this patrix (1) to move up and down is also installed on described patrix (1), on described counterdie (4), is also provided with the second drive unit that drives described thimble (7) to move up and down.
5. the forging mesopore cold forging die of T iron according to claim 2, is characterized in that: the cross sectional shape of described tap hole (6) is for circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310576241.6A CN103611868A (en) | 2013-11-18 | 2013-11-18 | Cold forging die for forging center holes of T iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310576241.6A CN103611868A (en) | 2013-11-18 | 2013-11-18 | Cold forging die for forging center holes of T iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103611868A true CN103611868A (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310576241.6A Pending CN103611868A (en) | 2013-11-18 | 2013-11-18 | Cold forging die for forging center holes of T iron |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104139142A (en) * | 2014-06-26 | 2014-11-12 | 梧州恒声电子科技有限公司 | Diameter-expanding technique for T iron produced through cold forging |
| CN109175906A (en) * | 2018-09-30 | 2019-01-11 | 太仓西瑞金属制品有限公司 | The processing method of miniature magnetic core |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07100574A (en) * | 1992-07-31 | 1995-04-18 | Dijet Ind Co Ltd | Hot forging die device |
| CN202097223U (en) * | 2011-04-25 | 2012-01-04 | 宁波向阳坦科斯特电子有限公司 | Die for manufacturing T-shaped iron |
| CN203610587U (en) * | 2013-11-18 | 2014-05-28 | 梧州恒声电子科技有限公司 | T-iron middle-hole cold-forging mould |
-
2013
- 2013-11-18 CN CN201310576241.6A patent/CN103611868A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07100574A (en) * | 1992-07-31 | 1995-04-18 | Dijet Ind Co Ltd | Hot forging die device |
| CN202097223U (en) * | 2011-04-25 | 2012-01-04 | 宁波向阳坦科斯特电子有限公司 | Die for manufacturing T-shaped iron |
| CN203610587U (en) * | 2013-11-18 | 2014-05-28 | 梧州恒声电子科技有限公司 | T-iron middle-hole cold-forging mould |
Non-Patent Citations (1)
| Title |
|---|
| 冀东生: "中空分流锻造成形机理及应用技术研究", 《中国博士学位论文全文数据库 工程科技I辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104139142A (en) * | 2014-06-26 | 2014-11-12 | 梧州恒声电子科技有限公司 | Diameter-expanding technique for T iron produced through cold forging |
| CN109175906A (en) * | 2018-09-30 | 2019-01-11 | 太仓西瑞金属制品有限公司 | The processing method of miniature magnetic core |
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Application publication date: 20140305 |