CN210676794U - Forging and pressing die for high-precision wear-resistant alloy mobile phone frame - Google Patents
Forging and pressing die for high-precision wear-resistant alloy mobile phone frame Download PDFInfo
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- CN210676794U CN210676794U CN201921071246.2U CN201921071246U CN210676794U CN 210676794 U CN210676794 U CN 210676794U CN 201921071246 U CN201921071246 U CN 201921071246U CN 210676794 U CN210676794 U CN 210676794U
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Abstract
The utility model discloses a forging mould of high accuracy wear-resisting alloy cell-phone frame, including the preforging die of being connected with the forging head, the forging head fixed connection is on its forging head of forging machine, sets up the preforging terrace die under the preforging die, and the fixed surface sets up at least three spacer pin and a plurality of spring under the preforging terrace die, and the preforging terrace die passes through spacer pin and spring swing joint on the lower bolster plate, and the lower bolster plate sets up the screw in the corresponding position department of spacer pin, is equipped with the screw rod with the screw adaptation; a pre-forging stroke limiting block is arranged on the pre-forging female die or the pre-forging male die; a central hole through which the mandril passes is arranged on the lower base plate; the depth of a cell phone frame edge cavity formed by the pre-forging female die is 1-3 mm higher than the height of the edge of the pre-forged cell phone frame; the forging and pressing die further comprises a finish forging female die, and the depth of a die cavity at the edge of the mobile phone frame formed by the finish forging female die is matched with the height of the edge of the mobile phone frame of the finish forging. The utility model discloses a flow control forming technology control material flow process and forging and pressing streamline.
Description
Technical Field
The utility model relates to a forging and pressing mould of high accuracy wear-resisting alloy cell-phone frame.
Background
As the functions of the mobile phone become more and more powerful, the heat productivity of the mobile phone is obviously increased, so that the heat dissipation of the mobile phone is difficult, and even the normal use of the mobile phone is affected in severe cases; meanwhile, the mobile phone is frequently used, and the requirements on wear resistance and falling resistance are higher and higher. Therefore, the importance of the mobile phone frame is remarkably improved, the mobile phone frame is required to protect the mobile phone, the wear resistance and the falling resistance are good, and the appearance is further required to be attractive; moreover, the heat dissipation performance of the mobile phone frame is good, and the normal use of the mobile phone is ensured.
At present, the frame material of the mobile phone mainly comprises plastic, stainless steel, aluminum and other materials. The mobile phone frame made of the plastic material has low cost, but has lower tensile strength and bending strength, and is easy to deform when being collided or subjected to other external forces, so that the service life of the mobile phone is shortened, and the appearance texture is not popular with the public. The mobile phone frame made of the stainless steel material has good metal texture, good chemical corrosion resistance and electrochemical corrosion resistance, heavy weight, light weight and high cost. The mobile phone frame made of aluminum materials has good metal texture, light weight, good strength, difficult deformation and easy processing, but has poor heat insulation performance, poor surface treatment, easy color change, poor air tightness and poor wear resistance.
Due to the change of the ideas of people, the requirements on the touch and the texture of the mobile phone shell are continuously improved, most enterprises begin to research and develop the alloy mobile phone frame, and the mobile phone frame is diversified in materials, such as an aluminum alloy frame, a stainless steel frame and a titanium alloy frame.
At present, the mobile phone industry in China is rapidly developed, a large number of enterprises such as apples and samsung have processing plants in China, market shares of China such as Huashi, millet, hammers and charm are gradually increased, and mobile phones of customer groups are gradually saturated, so that the occupation of market shares by producing a mobile phone frame with better hand feeling is an important task at present. The mobile phone frame made of magnesium-aluminum alloy is soft and easy to deform at present, and the development of a high-precision wear-resistant alloy mobile phone frame is required, so that high requirements are provided for metal flow during forging forming;
in recent years, as the die forging forming technology has the remarkable advantages of material compaction, welding defects, flow line continuity maintenance and performance improvement, the direct die forging forming of the mobile phone frame becomes an important development trend.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects in the prior art, providing a forging and pressing die for a high-precision wear-resistant alloy mobile phone frame, fully utilizing the flow control forming technology, accurately controlling the non-uniform plastic flow of metal materials, improving the forming performance, avoiding the defects of folding, underfill and the like, ensuring that the metal flow line is continuous and compact, and improving the mechanical performance of a forging product; the surface of the forged piece is smoother, the dimensional accuracy is higher, and the tolerance is small; the alloy mobile phone frame has the advantages of high precision, wear resistance, long service life and good hand feeling.
In order to achieve the purpose, the technical scheme of the utility model is to design a forging die of high accuracy wear-resisting alloy cell-phone frame, including the preforging die of detachable connection with the forging head, the upper surface fixed connection of forging head is on the lower surface of its forging head of forging machine, set up the preforging terrace die under the preforging die, the lower surface fixed of preforging terrace die sets up at least three spacer pin and a plurality of spring, the preforging terrace die is through spacer pin and spring swing joint on the lower bolster plate, the lower bolster plate sets up the screw in the corresponding position department of spacer pin, be equipped with the screw rod with the screw adaptation, the up end of screw rod flushes with the upper surface of lower bolster plate; a pre-forging stroke limiting block is arranged on the pre-forging female die or the pre-forging male die; a central hole through which the mandril passes is arranged on the lower base plate; the depth of a cell phone frame edge cavity formed by the pre-forging female die is 1-3 mm higher than the height of the edge of the pre-forged cell phone frame; the forging and pressing die further comprises a finish forging female die, and the depth of a die cavity at the edge of the mobile phone frame formed by the finish forging female die is matched with the height of the edge of the mobile phone frame of the finish forging. The screw rod is screwed in the screw hole during preforging, the preforging male die (subsequently used as the final forging male die) is still during preforging due to the action of the limiting pin, the preforging female die and the preforging male die are matched to finish the preforging of the blank along with the descending of a forging head of a forging press, and the preforging female die moves downwards, so that the metal flowing speed of the edge part of the blank is lower, the depth of a cell phone frame edge cavity formed by the preforging female die is 1-3 mm higher than the height of the edge of the cell phone frame of a preforging piece upwards so as to adjust the metal flowing speed, and the defect that the metal flowing speed of the edge part of the blank is lower is overcome. And the arrangement of the spring and the screw rod prolongs the finish forging time, ensures more time for metal flowing and ensures that the thickness of the formed final product is uniform at all positions.
The action process is as follows:
firstly, a pre-forging female die is fixedly installed on a forging head of a forging press, then the forging press is started, the pre-forging female die and a pre-forging male die are assembled, a blank is pressed and pre-forged to form, the blank is taken down after the die is opened, the pre-forging female die is taken down and replaced by a finish-forging female die, a screw is unscrewed and taken out at the same time, a limiting pin descends, the pre-forging male die (which is used as a finish-forging male die at this time) becomes supported by a spring, then the pre-forging piece is placed on the male die, then the forging press is started to carry out finish forging, the finish-forging female die and the finish-forging male die descend together until the finish-forging male die abuts against a lower.
The further technical proposal is that the ejector rod is in a shape of a circular tube, and a central hole on the lower backing plate is an annular hole; the top end of the limiting pin is integrally provided with a cylindrical limiting head with the diameter larger than the diameter of the pin body of the limiting pin. The ejector rod is used for assisting in jacking the forge piece and demoulding after forging; the limiting head prevents the limiting pin from directly falling off from the screw hole.
The further technical scheme is that the limiting pin comprises a round pipe arranged on the upper end face of the screw rod and a cylindrical pin body arranged in the round pipe in a sliding mode, the upper end and the middle of the side face of the round pipe are respectively provided with a through hole, and a clamping pin is matched with the through holes. Therefore, the height of the limiting pin can be adjusted to meet the requirements of different finish forging and stamping time, the bayonet lock is inserted into the through hole at the upper end when the finish forging time is short, and the bayonet lock is inserted into the through hole at the middle part when the finish forging time is long (so that the distance between the male die and the female die is longer, and more spring compression distance is provided, namely more finish forging time is provided).
The main sequence of the mobile phone frame is as follows:
1. selecting a production material according to a drawing, selecting SUS 304 steel, and designing a product deformation drawing and a process size according to a computer.
2. And (3) stamping and stretching to form, namely stretching the plate to a required box-shaped shell by using a punch press and a stamping and stretching die, and then performing subsequent processes such as blanking, rotary cutting and the like to form the mobile phone outer frame. However, the mobile phone outer frame product is formed by stretching, so that the thickness difference and the internal structural characteristic abnormity of the product cannot be realized, the material utilization rate is low, and the product requirements cannot be met
3. And (5) metal cutting. The metal cutting method is the most traditional and the most direct method, namely, the sheet material can be cut into strip-shaped bending, and then CNC cutting processing is carried out; secondly, the blank is made by extruding the section bar and then is formed by CNC cutting processing. However, the plate or section metal cutting process has the following problems for the mobile phone outer frame product: low material utilization rate, low metal cutting efficiency, difficult hardness of HV310 and the like.
In order to meet the requirement of product hardness and reduce the cutting allowance as much as possible, the scheme adopts a thinner plate, the product characteristics are processed and formed in a precise cold forging and upsetting mode, the material hardness is improved, and a cutting blank is manufactured. And (3) precisely cooling and roughly forming a blank, and precisely machining by combining CNC cutting to prepare the required product. The process has the following characteristics
① material utilization rate is high, can select the panel coil stock of thickness 2.0mm, designs the tablet according to product characteristic distribution, and the at utmost reduces the waste material.
② has high production efficiency and good mass production, and is suitable for mass production.
③ the cold forging and upsetting adopts a die, and the precision and the quality of the product are stable and reliable.
④ the blank allowance of cold forging can be designed according to local characteristics of the product, CNC machining allowance is small and uniform, single-side allowance can reach 0.3mm, special cutting and machining equipment is greatly saved, and the service life of the machining tool can be prolonged.
⑤ the product hardness can be increased to HV310 by forging cold work hardening, which can meet the product strength design requirement.
⑥ A Flow control forming technology (FCF) is used to apply extra resistance to the part where the material is easy to Flow in the metal shaping forming process to control the Flow speed and distribution of the material, so as to obtain the required forge piece, which is characterized by that IT can precisely control the non-uniform plastic Flow of the metal material, improve the forming performance, realize the precision forming of more complex parts, effectively avoid the defects of folding and underfilling, make the metal Flow line continuously compact, improve the mechanical performance of the forge piece product, make the forge piece surface more smooth, have higher dimensional accuracy, and ITs tolerance can reach IT 8-9 level.
(2) By adopting the environment-friendly cutting fluid SF11A, the prior Mobrand EP260 semisynthesis cutting fluid (containing nitrite) is used for processing, and the problems that the cutting fluid is easy to smell and deteriorate, the soap precipitation, the emulsion particles are thickened, the cleaning performance is reduced and the like are caused after long-term use; after using Anmei SF11A, the cutting fluid is not easy to deteriorate, long in service cycle, good in cleaning performance, stable in working fluid, and improved in workpiece surface smoothness, and after the workpiece is processed, the workpiece is free from rinsing with clear water (the fully synthetic cutting fluid is a water-soluble cutting fluid only selected from chemically synthetic base oil (i.e. not containing mineral oil), the heat transfer performance and cooling effect of water are good, but the simple water easily causes metal to rust, and the lubricating performance is poor Surfactant, preservative, etc. The diameter of oil drops of the diluent is less than 1 mu m, and the diluent is transparent or semitransparent. Has good cooling, lubricating and anti-rust properties. The cutting fluid has the advantages of emulsion and synthetic cutting fluid, makes up for the defects of the emulsion and the synthetic cutting fluid, and is a trend of the cutting fluid. Thus semisynthetic cutting fluids are used in processing); the main technical indexes of the prepared product are as follows:
1. the material is as follows: the hardness of SUS 304 is more than or equal to 310 HV;
2. the precision is 0.05 mm;
3. the glossiness is 5.8-8.3;
4. the color difference is required to be 0.53-1.13;
5. the tensile strength is more than 500 mpa; the yield strength is more than 200 mpa; the elongation is more than 35 percent; the elastic modulus is more than 200 Gpa;
the utility model has the advantages and the beneficial effects that: the flow control forming technology is fully utilized, the non-uniform plastic flow of the metal material is accurately controlled, the forming performance of the metal material is improved, the defects of folding, underfill and the like are avoided, the metal flow line is continuous and compact, and the mechanical performance of a forged piece product is improved; the surface of the forged piece is smoother, the dimensional accuracy is higher, and the tolerance is small; the alloy mobile phone frame has the advantages of high precision, wear resistance, long service life and good hand feeling. The screw rod is screwed in the screw hole during preforging, the preforging male die (subsequently used as the final forging male die) is still during preforging due to the action of the limiting pin, the preforging female die and the preforging male die are matched to finish the preforging of the blank along with the descending of a forging head of a forging press, and the preforging female die moves downwards, so that the metal flowing speed of the edge part of the blank is lower, the depth of a cell phone frame edge cavity formed by the preforging female die is 1-3 mm higher than the height of the edge of the cell phone frame of a preforging piece upwards so as to adjust the metal flowing speed, and the defect that the metal flowing speed of the edge part of the blank is lower is overcome. And the arrangement of the spring and the screw rod prolongs the finish forging time, ensures more time for metal flowing and ensures that the thickness of the formed final product is uniform at all positions. The height of the limiting pin can be adjusted to meet the requirements of different finish forging and stamping time; the alloy mobile phone frame with high precision, wear resistance, long service life and good hand feeling can be formed; the high-precision wear-resistant alloy mobile phone frame has high precision and strong wear resistance, does not contain harmful substances, and accords with the national standard GB2828-1987YD/T1214-2002 and the 'mobile phone production test standard' of ETSI GSM 05.01.
Drawings
Fig. 1 is a schematic diagram of a forging and pressing die for a high-precision wear-resistant alloy mobile phone frame of the present invention before pre-forging;
FIG. 2 is a schematic view of FIG. 1 after the closing and pre-forging operations have been completed;
FIG. 3 is a schematic view before the start of finish forging;
FIG. 4 is a schematic view of FIG. 3 after finish forging;
FIG. 5 is an enlarged schematic view of the spacing pin of FIG. 1;
FIG. 6 is a schematic view of another state of FIG. 5;
FIG. 7 is a schematic view of yet another state of FIG. 5;
FIG. 8 is a schematic view of the product after finish forging;
fig. 9 is a schematic view of forging after finish forging.
In the figure: 1. forging and pressing head; 2. pre-forging a female die; 3. pre-forging a male die; 4. a spacing pin; 5. a spring; 6. a lower base plate; 7. a screw; 8. a limiting block; 9. a top rod; 10. finish forging the female die; 11. a limiting head; 12. a circular tube; 13. a pin body; 14. a through hole; 15. a bayonet lock.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 9, the utility model relates to a forging and pressing mould of high accuracy wear-resisting alloy cell-phone frame, include the preforging die 2 of being connected with forging head 1 is detachable, the upper surface fixed connection of forging head 1 is on the lower surface of its forging head 1 of forging machine, set up preforging terrace die 3 under the preforging die 2, the lower surface fixed of preforging terrace die 3 sets up at least three spacer pin 4 and a plurality of spring 5, preforging terrace die 3 is through spacer pin 4 and spring 5 swing joint on lower bolster 6, lower bolster 6 sets up the screw at the corresponding position of spacer pin 4, be equipped with screw rod 7 with the screw adaptation, the up end of screw rod 7 flushes with the upper surface of lower bolster 6; a pre-forging stroke limiting block 8 is arranged on the pre-forging female die 2 or the pre-forging male die 3; a central hole through which the mandril 9 passes is arranged on the lower cushion plate 6; the depth of a cell phone frame edge cavity formed by the pre-forging female die 2 is 1-3 mm higher than the height of the edge of the pre-forged cell phone frame; the forging and pressing die further comprises a finish forging female die 10, and the depth of a cavity at the edge of the mobile phone frame formed by the finish forging female die 10 is matched with the height of the edge of the mobile phone frame of the finish forging. The ejector rod 9 is in a circular tube shape, and a central hole on the lower backing plate 6 is an annular hole; the top end of the limit pin 4 is integrally provided with a cylindrical limit head 11 with the diameter larger than that of a pin body 13 of the limit pin 4. The limiting pin 4 comprises a round tube 12 arranged on the upper end face of the screw 7 and a cylindrical pin body 13 arranged in the round tube 12 in a sliding manner, the upper end and the middle part of the side face of the round tube 12 are respectively provided with a through hole 14, and a bayonet 15 is matched with the through hole 14.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. The forging and pressing die for the high-precision wear-resistant alloy mobile phone frame is characterized by comprising a pre-forging female die detachably connected with a forging and pressing head, wherein the upper surface of the forging and pressing head is fixedly connected to the lower surface of the forging and pressing head of a forging and pressing machine; a pre-forging stroke limiting block is arranged on the pre-forging female die or the pre-forging male die; a central hole through which the mandril passes is arranged on the lower base plate; the depth of a cell phone frame edge cavity formed by the pre-forging female die is 1-3 mm higher than the height of the edge of the pre-forged cell phone frame; the forging and pressing die further comprises a finish forging female die, and the depth of a die cavity at the edge of the mobile phone frame formed by the finish forging female die is matched with the height of the edge of the mobile phone frame of the finish forging.
2. The forging and pressing die for the high-precision wear-resistant alloy mobile phone frame as claimed in claim 1, wherein the ejector rod is in a shape of a circular tube, and the central hole in the lower backing plate is an annular hole; the top end of the limiting pin is integrally provided with a cylindrical limiting head with the diameter larger than the diameter of the pin body of the limiting pin.
3. The die for forging and pressing the high-precision wear-resistant alloy mobile phone frame as claimed in claim 2, wherein the limiting pin comprises a circular tube arranged on the upper end face of the screw rod and a cylindrical pin body arranged in the circular tube in a sliding manner, the upper end and the middle part of the side face of the circular tube are respectively provided with a through hole, and a clamping pin is arranged in a manner of being matched with the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921071246.2U CN210676794U (en) | 2019-07-10 | 2019-07-10 | Forging and pressing die for high-precision wear-resistant alloy mobile phone frame |
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| CN201921071246.2U CN210676794U (en) | 2019-07-10 | 2019-07-10 | Forging and pressing die for high-precision wear-resistant alloy mobile phone frame |
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| CN210676794U true CN210676794U (en) | 2020-06-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404325A (en) * | 2020-11-25 | 2021-02-26 | 江苏宏宝锻造股份有限公司 | Upsetting device of spline mandrel |
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2019
- 2019-07-10 CN CN201921071246.2U patent/CN210676794U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404325A (en) * | 2020-11-25 | 2021-02-26 | 江苏宏宝锻造股份有限公司 | Upsetting device of spline mandrel |
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Address after: 214400 No.11 Yunting Naxiang Road, Jiangyin City, Wuxi City, Jiangsu Province Patentee after: Jiangsu Kangrui New Material Technology Co.,Ltd. Address before: 214400 No.11 Yunting Naxiang Road, Jiangyin City, Wuxi City, Jiangsu Province Patentee before: JIANGYIN KANGRUI MOLDING TECHNOLOGY Co.,Ltd. |