CN111974882B - Insert type hard alloy rolling die for rim - Google Patents
Insert type hard alloy rolling die for rim Download PDFInfo
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- CN111974882B CN111974882B CN202010678758.6A CN202010678758A CN111974882B CN 111974882 B CN111974882 B CN 111974882B CN 202010678758 A CN202010678758 A CN 202010678758A CN 111974882 B CN111974882 B CN 111974882B
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- insert
- rim
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- annular
- inclined plane
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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
-
- 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
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/16—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
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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
- B21D37/01—Selection of materials
Abstract
The invention provides an insert type hard alloy rolling die for a rim, which effectively improves the hardness, the wear resistance and the smoothness of key parts of the die so as to improve the product quality and reduce the production cost, and the rim comprises a middle groove bottom section, wherein one side of the middle groove bottom section is connected with a 5-degree inclined plane section, the other side of the middle groove bottom section is connected with a flat peak section, the flat peak section is connected with the other 5-degree inclined plane section, and the outer sides of the two 5-degree inclined plane sections are respectively connected with a rim section; the insert type hard alloy rolling die comprises an upper roller, a lower roller, an upper roller insert and a lower roller insert, wherein two sides of the outer circular surface of the upper roller and the outer circular surface of the lower roller are respectively provided with an annular step, the upper roller insert and the lower roller insert are both annular pieces, the two upper roller inserts are respectively matched with the annular steps of the outer circular surface of the upper roller, the two lower roller inserts are respectively matched with the annular steps of the outer circular surface of the lower roller, and the upper roller insert and the lower roller insert are both made of hard alloy materials.
Description
Technical Field
The invention relates to the field of wheel rim manufacturing dies, in particular to an insert type hard alloy rolling die for a rim.
Background
With the promotion of light weight of automobiles, the overall weight of the steel wheel is continuously reduced, and meanwhile, the performance requirements are continuously increased, improved and improved. In order to meet the requirements, the steel wheel needs to optimize the product structure and improve the strength grade of the material in design. The structure of the product is optimized, the manufacturing process is complicated, and the difficulty is high; the strength grade of the material is improved, and the traditional mould material shows different degrees of inapplicability or can not be used. Therefore, new technologies are required to be continuously explored and tried to meet the technological requirements of products.
The steel wheel for the passenger car is formed by welding a spoke and a rim, wherein the rim is formed by processing a strip material through a series of procedures of rolling, butt welding, rolling, expanding and the like. The rim is matched with a tire to form a closed space to form an inflation cavity, so that the requirement of no inner tube is met. The smaller the deviation between the rolling shape of the rim and the theory is, the more stable the comprehensive performances are, and the key of the matching sealing performance of the rim and the tire is at the 5-degree inclined position of the bead seat. When the tire pressure is low, the flat and round peaks can effectively prevent the tire from deviating from the bead seat and entering the groove bottom, and the safety risk is reduced. The traditional mould is limited in wear resistance and adhesion, so that the upper and lower rolling moulds cannot be rolled sufficiently.
The steel wheel is used as a large function key and a safety part of the vehicle, and in the rolling process, the material flows and is formed, the thickness of the material is thinned, and the rigidity and the strength of the wheel are influenced. In the aspects of product design and manufacturing process design, the design is optimized, and the material thinning is reduced. In the use of the traditional die material, the smooth finish is easy to reduce, the friction is increased, and the forming fluidity of the material is not favorable, so that the thinning of the material is influenced.
The wheel is always impacted during running, the wheel rim is stressed maximally, and the defects of deformation, cracking and the like occur. In manufacturing and designing, unbalance exists in products, the unbalance of wheels directly influences the comfortable appearance and the service life of a vehicle, and a balance block needs to be added to reduce the unbalance value. The balance weight is arranged on the rim of the steel wheel. During tire installation and vehicle assembly, the wheel rim contacts the hand. The edge of the wheel rim is equivalent to a cutter rotating at a high speed in the rolling process, the working condition is severe, and the problems of wheel rim burrs, flash, grinding, large wheel rim shape difference and the like are easy to occur.
Disclosure of Invention
The invention provides an insert type hard alloy rolling die for a rim, which effectively improves the hardness, the wear resistance and the smoothness of key parts of the die so as to improve the product quality and reduce the production cost.
The rim comprises a middle groove bottom section, wherein one side of the middle groove bottom section is connected with a 5-degree inclined plane section, the other side of the middle groove bottom section is connected with a flat peak section, the flat peak section is connected with another 5-degree inclined plane section, and the outer sides of the two 5-degree inclined plane sections are respectively connected with a rim section;
the insert type hard alloy rolling die comprises an upper roller, a lower roller, an upper roller insert and a lower roller insert, wherein two sides of the outer circular surface of the upper roller and the outer circular surface of the lower roller are respectively provided with an annular step, the upper roller insert and the lower roller insert are both annular pieces, the two upper roller inserts are respectively matched with the annular steps of the outer circular surface of the upper roller, the two lower roller inserts are respectively matched with the annular steps of the outer circular surface of the lower roller, and the upper roller insert and the lower roller insert are both made of hard alloy materials.
Preferably, the outer circular surface of the upper roll is provided with an annular protruding part which is matched with the middle groove bottom section of the outer circular surface of the rim, the two annular steps of the upper roll are respectively arranged at two sides of the annular protruding part, the inner circular surfaces of the two annular upper roll insert blocks are respectively matched with the two annular steps, the outer circular surface can be matched with the 5-degree inclined plane section and the rim section of the rim, the outer circular surface of the upper roll insert block at one side is also provided with a flat peak section which is connected with one side, far away from the rim section, of the 5-degree inclined plane section, and the flat peak section on the upper roll insert block corresponds to the flat peak section on the rim.
Preferably, the outer circular surface of the lower roll is provided with an annular concave part, the annular concave part is matched with the middle groove bottom of the outer circular surface of the rim, two sides of the annular concave part are respectively provided with a 5-degree inclined plane section, the annular concave part on one side corresponding to the flat peak section of the rim is connected with the 5-degree inclined plane section through an arc surface convex part, the annular step of the outer circular surface of the lower roll is arranged on the outer sides of the two 5-degree inclined plane sections, the two lower roll insert blocks are respectively arranged on the two annular steps, one side of the lower roll insert block, which is close to the 5-degree inclined plane section, is provided with an arc surface, and the arc surface can be matched with the rim section on the rim.
Preferably, the end surfaces of the upper rolling insert and the lower rolling insert, which are far away from the upper rolling annular protrusion, are respectively provided with an annular pressing block, and the pressing blocks are respectively and fixedly connected with the corresponding upper rolling insert and the corresponding lower rolling insert through screws and cylindrical pins.
The beneficial effect of above-mentioned scheme lies in:
1. the key size items of the 5-degree inclined plane, the flat plane and the round peak of the rim and the bead seat are severe in working conditions and large in stress in roll forming, and need to be fully stressed and rolled to form so as to ensure that the deviation of the size and the theoretical shape is small. The traditional die material is adopted, the process can be trial-manufactured, but in the batch production, due to the characteristics of the die material, if the die material is fully stressed and rolled, the surface of the die is easy to stick to workpiece materials, so that the defects of workpiece galling, flash, burr, double-edged eyelid and the like are caused, and therefore proper concession is needed, the critical dimension needs to be within the tolerance range, and a certain deviation exists from the theory. According to the invention, the hard alloy insert is designed at the key size part, so that the rolling forming can be fully performed in the rolling forming process, and the rim deviation value is small.
2. The rim is similar to a high-speed rotating cutter due to the edge of the material, the damage to the die is large, the defects of flash, burrs and the like easily occur on the rim of a product made of the traditional die material, and the defects of rough surfaces and the like of other parts due to the abrasion of the die. According to the invention, the hard alloy material insert with high hardness and high wear resistance is designed at the most stressed part, so that the problems of the defects of burrs and the like of a workpiece are effectively avoided, and the appearance quality of the product is improved.
3. The traditional die material is easy to wear due to large force, the surface smoothness is poor, the friction coefficient is increased, the flowability of the material in the forming process is hindered, the stress is large, the deformation is large, the material thinning amount is correspondingly increased, and the like. The invention adopts the high-wear-resistance hard alloy material, and mainly uses a grinding process in the processing, the grinding and finish machining are carried out, the surface smoothness meets the requirement of a mirror surface, the friction coefficient is small, and the fluidity of the material in the re-forming process is good.
4. The roll-forming die of the traditional material has low unit price and correspondingly low service life, and the manufacturing CPU amortized to each product is 0.16. The invention uses the hard alloy insert, but only uses the hard alloy material at the key part of the die, the usage amount of the hard alloy is lower, thereby reducing the manufacturing cost, the unit price of the die is more expensive than that of the die made of the traditional material, but the CPU distributed on each product is 0.053, the economy is good, and the invention is suitable for mass products.
5. The traditional mould is locally stressed due to material properties and is easy to wear in a rolling mould, and the mould needs to be ground, polished and maintained in production; in order to ensure the appearance quality and the size of the product, the balance adjustment is needed, and the adjustment time is long. According to the invention, the key parts of the die are made of the hard alloy material with high hardness and high wear resistance, the assembly adopts a cold shrinkage interference method, the matching surfaces are fully contacted, the stress unevenness of the hard alloy is small, the fracture risk is correspondingly reduced, the stop polishing is not needed in long-time production and use, the failure rate is low, the appearance problem of the die production can be not considered, the size item is mainly adjusted, the adjustment time is short, and the comprehensive production benefit is improved.
Drawings
Fig. 1 is a cross-sectional view of the present invention.
Fig. 2 is an enlarged view of a portion of the structure of fig. 1.
Fig. 3 is an enlarged view of a portion of a structure at a in fig. 1.
Detailed Description
Embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the object to be processed by the mold according to this embodiment is a rim, the rim includes a middle groove bottom section 12, one side of the middle groove bottom section 12 is connected with a 5 ° inclined plane section 10, the other side is connected with a flat peak section 14, the flat peak section 14 is connected with another 5 ° inclined plane section 10, and the outer sides of the two 5 ° inclined plane sections 10 are respectively connected with a rim section 9;
the insert type hard alloy rolling die comprises an upper roller 3, a lower roller 6, an upper roller insert 4 and a lower roller insert 5, wherein two sides of the outer circular surfaces of the upper roller 3 and the lower roller 6 are respectively provided with an annular step, the upper roller insert 4 and the lower roller insert 5 are both annular pieces, the two upper roller inserts 4 are respectively matched with the annular step of the outer circular surface of the upper roller 3, the two lower roller inserts 5 are respectively matched with the annular step of the outer circular surface of the lower roller 6, and the upper roller insert 4 and the lower roller insert 5 are both made of hard alloy materials.
In this embodiment, the outer circumferential surface of the upper roller 3 is provided with an annular protruding portion 7, the annular protruding portion 7 is fitted with a middle groove bottom section 12 of the outer circumferential surface of the rim, two annular steps of the upper roller 3 are respectively arranged on two sides of the annular protruding portion 7, inner circumferential surfaces of the two annular upper roller inserts 4 are respectively fitted with the two annular steps, the outer circumferential surfaces can be fitted with a 5 ° inclined plane section 10 and a rim section 9 of the rim, the outer circumferential surface of the upper roller insert 4 on one side is further provided with a flat peak section 11, the flat peak section 11 is connected with a side, away from the rim section 9, of a 5 ° inclined plane section 16 of the upper roller insert, and the flat peak section 11 on the upper roller insert 4 corresponds to the flat peak section 14 on the rim.
In this embodiment, the outer circumferential surface of the lower roll 6 is provided with an annular concave portion 8, the annular concave portion 8 is fitted with a middle groove bottom section 12 of the outer circumferential surface of the rim, two sides of the annular concave portion 8 are respectively provided with a 5 ° inclined plane section 15, wherein the annular concave portion 8 at one side corresponding to the rim flat peak section 14 is connected with the 5 ° inclined plane section 15 through an arc surface convex portion 13, the annular step of the outer circumferential surface of the lower roll 6 is arranged at the outer sides of the two 5 ° inclined plane sections 15, the two lower roll insert blocks 5 are respectively arranged on the two annular steps, one side of the lower roll insert block 5, which is close to the 5 ° inclined plane section 15, is provided with an arc surface 17, and the arc surface 17 can be fitted with a rim section 9 on the rim.
In the embodiment, the end surfaces of the upper rolling insert 4 and the lower rolling insert 5, which are far away from the annular protrusion 7 of the upper roller 3, are respectively provided with an annular pressing block 1(2), and the pressing blocks 1(2) are respectively fixedly connected with the corresponding upper rolling insert 4 and the corresponding lower rolling insert 5 through screws and cylindrical pins.
The key size items of the 5-degree inclined plane, the flat plane and the round peak of the rim and the bead seat are severe in working conditions and large in stress in roll forming, and need to be fully stressed and rolled to form so as to ensure that the deviation of the size and the theoretical shape is small. The traditional die material is adopted, the process can be trial-manufactured, but in the batch production, due to the characteristics of the die material, if the die material is fully stressed and rolled, the surface of the die is easy to stick to workpiece materials, so that the defects of workpiece galling, flash, burr, double-edged eyelid and the like are caused, and therefore proper concession is needed, the critical dimension needs to be within the tolerance range, and a certain deviation exists from the theory. According to the invention, the hard alloy insert is designed at the key size part, so that the rolling forming can be fully performed in the rolling forming process, and the rim deviation value is small.
The rim is similar to a high-speed rotating cutter due to the edge of the material, the damage to the die is large, the defects of flash, burrs and the like easily occur on the rim of a product made of the traditional die material, and the defects of rough surfaces and the like of other parts due to the abrasion of the die. According to the invention, the hard alloy material insert with high hardness and high wear resistance is designed at the most stressed part, so that the problems of the defects of burrs and the like of a workpiece are effectively avoided, and the appearance quality of the product is improved.
The traditional die material is easy to wear due to large force, the surface smoothness is poor, the friction coefficient is increased, the flowability of the material in the forming process is hindered, the stress is large, the deformation is large, the material thinning amount is correspondingly increased, and the like. The invention adopts the high-wear-resistance hard alloy material, and mainly uses a grinding process in the processing, the grinding and finish machining are carried out, the surface smoothness meets the requirement of a mirror surface, the friction coefficient is small, and the fluidity of the material in the re-forming process is good.
The roll-forming die of the traditional material has low unit price and correspondingly low service life, and the manufacturing CPU amortized to each product is 0.16. The invention uses the hard alloy insert, but only uses the hard alloy material at the key part of the die, the usage amount of the hard alloy is lower, thereby reducing the manufacturing cost, the unit price of the die is more expensive than that of the die made of the traditional material, but the CPU distributed on each product is 0.053, the economy is good, and the invention is suitable for mass products.
The traditional mould is locally stressed due to material properties and is easy to wear in a rolling mould, and the mould needs to be ground, polished and maintained in production; in order to ensure the appearance quality and the size of the product, the balance adjustment is needed, and the adjustment time is long. According to the invention, the key parts of the die are made of the hard alloy material with high hardness and high wear resistance, the assembly adopts a cold shrinkage interference method, the matching surfaces are fully contacted, the stress unevenness of the hard alloy is small, the fracture risk is correspondingly reduced, the stop polishing is not needed in long-time production and use, the failure rate is low, the appearance problem of the die production can be not considered, the size item is mainly adjusted, the adjustment time is short, and the comprehensive production benefit is improved.
In this embodiment, when the pressing block is attached to the end face of the cemented carbide insert, a gap (as shown in fig. 3) of 0.2-0.3mm is formed between the pressing block and the end face of the upper roller, so that the bolt generates pre-pressure to be effectively loosened, and meanwhile, the pressure of the cemented carbide insert is increased, and the assembling friction force of the cemented carbide insert and the upper roller is correspondingly increased, so that the cemented carbide insert and the upper roller can be prevented from rotating relatively in future use; and a cylindrical pin is additionally arranged to prevent the bolt from being broken.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a formula of inserting carbide rolls type mould for rim, the rim includes middle part groove bottom segment, and middle part groove bottom segment one side is connected with 5 inclined plane sections, and a peak section is connected to the opposite side, another 5 inclined plane sections are connected to the peak section, and the rim section is connected respectively in two 5 inclined plane section outsides, its characterized in that: the insert type hard alloy rolling die comprises an upper roller, a lower roller, an upper roller insert and a lower roller insert, wherein two sides of the outer circular surface of the upper roller and the outer circular surface of the lower roller are respectively provided with an annular step, the upper roller insert and the lower roller insert are both annular pieces, the two upper roller inserts are respectively matched with the annular steps of the outer circular surface of the upper roller, the two lower roller inserts are respectively matched with the annular steps of the outer circular surface of the lower roller, and the upper roller insert and the lower roller insert are both made of hard alloy materials.
2. The insert-type cemented carbide roll-type die of claim 1, wherein: the outer circle surface of the upper roll is provided with an annular protruding part which is matched with the middle groove bottom section of the outer circle surface of the rim, two annular steps of the upper roll are respectively arranged at two sides of the annular protruding part, the inner circle surfaces of the two annular upper roll insert blocks are respectively matched with the two annular steps, the outer circle surface can be matched with a 5-degree inclined plane section and a rim section of the rim, the outer circle surface of the upper roll insert block at one side is also provided with a flat peak section, the flat peak section is connected with one side, far away from the rim section, of the 5-degree inclined plane section, and the flat peak section on the upper roll insert block corresponds to the flat peak section on the rim.
3. The insert-type cemented carbide roll-type die of claim 2, wherein: the outer circle of rolling down is equipped with annular depressed part, annular depressed part agrees with the middle part groove bottom of the outer circle of rim, and annular depressed part both sides respectively are equipped with a 5 inclined plane sections, wherein correspond through the arc surface bellying with the annular depressed part of the flat peak section of rim one side and are connected between 5 inclined plane sections, the annular step of the outer circle of rolling down is located two sections 5 inclined plane section outsides, and two are rolled down and are inserted the branch and locate two annular steps, roll down and be equipped with an arc surface on inserting one side of being close to 5 inclined plane sections, this arc surface can agree with the rim section on the rim.
4. The insert-type cemented carbide roll-type die of claim 3, wherein: the end surfaces, far away from the upper rolling annular protruding part, of the upper rolling insert and the lower rolling insert are respectively provided with an annular pressing block, and the pressing blocks are respectively and fixedly connected with the corresponding upper rolling insert and the corresponding lower rolling insert through screws and cylindrical pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010678758.6A CN111974882B (en) | 2020-07-15 | 2020-07-15 | Insert type hard alloy rolling die for rim |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010678758.6A CN111974882B (en) | 2020-07-15 | 2020-07-15 | Insert type hard alloy rolling die for rim |
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| Publication Number | Publication Date |
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| CN111974882A CN111974882A (en) | 2020-11-24 |
| CN111974882B true CN111974882B (en) | 2022-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010678758.6A Active CN111974882B (en) | 2020-07-15 | 2020-07-15 | Insert type hard alloy rolling die for rim |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2262248B (en) * | 1989-05-15 | 1993-09-15 | Honda Motor Co Ltd | Method for producing wheel rim |
| WO2011157646A1 (en) * | 2010-06-16 | 2011-12-22 | Mahle International Gmbh | Method for producing a closed profiled ring, in particular a rim ring for a two-wheeled vehicle |
| CN202138152U (en) * | 2011-05-30 | 2012-02-08 | 许昌恒丰实业有限公司 | Special-shaped steel profile for rims |
| CN206392703U (en) * | 2016-12-19 | 2017-08-11 | 厦门日上集团股份有限公司 | A kind of 15 ° of DC inner tube-free wheel rim flaring dies |
| CN110405092A (en) * | 2019-07-27 | 2019-11-05 | 安徽科技学院 | A kind of rim for automobile wheel angle flaring die |
| CN209680926U (en) * | 2019-03-08 | 2019-11-26 | 厦门日上集团股份有限公司 | A kind of contour roll forming mold that inner tube-free wheel rim three rolls |
-
2020
- 2020-07-15 CN CN202010678758.6A patent/CN111974882B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2262248B (en) * | 1989-05-15 | 1993-09-15 | Honda Motor Co Ltd | Method for producing wheel rim |
| WO2011157646A1 (en) * | 2010-06-16 | 2011-12-22 | Mahle International Gmbh | Method for producing a closed profiled ring, in particular a rim ring for a two-wheeled vehicle |
| CN202138152U (en) * | 2011-05-30 | 2012-02-08 | 许昌恒丰实业有限公司 | Special-shaped steel profile for rims |
| CN206392703U (en) * | 2016-12-19 | 2017-08-11 | 厦门日上集团股份有限公司 | A kind of 15 ° of DC inner tube-free wheel rim flaring dies |
| CN209680926U (en) * | 2019-03-08 | 2019-11-26 | 厦门日上集团股份有限公司 | A kind of contour roll forming mold that inner tube-free wheel rim three rolls |
| CN110405092A (en) * | 2019-07-27 | 2019-11-05 | 安徽科技学院 | A kind of rim for automobile wheel angle flaring die |
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| Publication number | Publication date |
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| CN111974882A (en) | 2020-11-24 |
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