CN113351821A - Forging method of high-precision bearing ring forge piece - Google Patents
Forging method of high-precision bearing ring forge piece Download PDFInfo
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- CN113351821A CN113351821A CN202110519650.7A CN202110519650A CN113351821A CN 113351821 A CN113351821 A CN 113351821A CN 202110519650 A CN202110519650 A CN 202110519650A CN 113351821 A CN113351821 A CN 113351821A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/04—Making machine elements ball-races or sliding bearing races
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
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Abstract
A forging method of a high-precision bearing ring forge piece comprises the following steps: heating, namely gradually heating the long round rod to enable the temperature of the long round rod to rise to 1100-1170 ℃; secondly, blanking, namely cutting the heated long round bar 1 into a section of bar stock, wherein the diameter of the bar stock is 34-36 mm, and the length of the bar stock is 34-36 mm; performing, namely stamping and forging a bar into a circular preformed piece, wherein an upper concave platform which is concave downwards and is in a circular truncated cone shape is formed on the upper end surface of the preformed piece, and a lower convex platform which is opposite to the upper concave platform and is in a circular truncated cone shape is formed on the lower end surface of the preformed piece; and fourthly, reshaping, performing stamping forging on the preformed piece again, forging the formed piece into a circular shape, expanding the outer diameter of the formed piece, and forging the shapes of the upper concave platform and the lower convex platform from a circular platform shape into a cylindrical shape. In the forging process, a preforming process is added, a bar stock is forged into a preforming piece with a special shape and structure, and then the forging piece with a required structure can be forged by gradually forging and stamping.
Description
The technical field is as follows:
the invention relates to the technical field of bearing ring forging methods, in particular to a forging method of a high-precision bearing ring forging.
Background art:
at present, an inner ring and an outer ring of a bearing are collectively called as a ferrule, the ferrule is formed into a circular forging piece by forging a bar stock, the forging piece is a blank of the ferrule, and the blank can be changed into the bearing ferrule by machining. At present, a forging of a bearing ring with a structure shown in fig. 1 is provided, the forging of the bearing ring comprises an upper annular sleeve body and a lower annular sleeve body, wherein the length of the upper end sleeve body is almost equal to that of the lower end sleeve body, and the length of the upper end sleeve body and the length of the lower end sleeve body are respectively 7mm and 6.5 mm.
The invention content is as follows:
the invention aims to provide a forging method of a high-precision bearing ring forge piece, aiming at the defects of the prior art, wherein a preforming procedure is added in the forging process, a bar is firstly forged into a preformed piece with a special shape structure, and then the preformed piece is gradually forged and stamped to forge the forge piece with a required structure.
A forging method of a high-precision bearing ring forge piece comprises the following steps:
heating, namely gradually heating the long round rod to enable the temperature of the long round rod to rise to 1100-1170 ℃;
secondly, blanking, namely cutting the heated long round bar 1 into a section of bar stock, wherein the diameter of the bar stock is 34-36 mm, and the length of the bar stock is 34-36 mm;
performing, namely stamping and forging a bar into a circular preformed piece, wherein an upper concave platform which is concave downwards and is in a circular truncated cone shape is formed on the upper end surface of the preformed piece, and a lower convex platform which is opposite to the upper concave platform and is in a circular truncated cone shape is formed on the lower end surface of the preformed piece;
the distance H4 between the upper end face of the preform and the lower end face of the preform is 10-10.4 mm, the distance H3 between the upper end face of the preform and the lower end face of the lower boss is 15.5-16 mm, and the diameter D4 of the outer ring of the preform is 70.6-71.2 mm; the taper angle alpha of the inner wall of the upper concave table of the preformed piece is 59.5-60.5 degrees, the taper angle beta of the outer wall of the lower convex table of the preformed piece is 55-55.4 degrees, the diameter D6 of the lower end of the outer wall of the lower convex table is 33.1-33.5 mm, the diameter D5 of the upper end of the inner wall of the upper concave table is 62.8-63.2 mm, and the depth h of the upper concave table is 6.8-7.1 mm;
fourthly, reshaping, stamping and forging the preformed piece again, forging the formed piece into a circular shape, expanding the outer diameter of the formed piece 4, forging the shapes of the upper concave platform and the lower convex platform into a cylindrical shape from a circular platform shape, reducing the diameter of the inner wall of the upper concave platform, and expanding the diameter of the outer wall of the lower convex platform;
the diameter D7 of the outer wall of the formed part is 72.2-72.6 mm, the diameter D9 of the inner wall of the upper concave table of the formed part is 39-39.5 mm, and the diameter D8 of the outer wall of the lower concave table of the formed part is 52.5-53 mm;
bottom cutting, namely stamping and cutting the formed part, and punching along the inner wall of an upper concave table of the formed part to obtain a semi-finished product part and a waste material part;
performing ring rolling, namely performing ring rolling on the semi-finished product to obtain a finished product;
the diameter D1 of finished product spare upper end outer wall is 71.5mm, and the diameter D2 of finished product spare lower extreme outer wall is 52mm, and the diameter D3 of finished product spare inner wall is 38mm, and the overall height H1 of finished product spare is 13.5mm, and the height H2 of finished product spare upper end outer wall is 7 mm.
Preferably, an outer transition fillet is formed between the lower boss of the preform and the lower end face of the preform.
Preferably, the outer ring of the bottom surface of the upper concave table of the preformed piece is formed with an inner transition fillet.
Preferably, the finished product part consists of two circular rings at the upper end and the lower end, and the diameter of the inner wall of the ring at the upper end of the finished product part is equal to that of the inner wall of the ring at the lower end of the finished product part.
Preferably, the inner wall of the upper end collar of the finished part is formed with a conical guide hole.
The invention has the beneficial effects that:
1. in the forging process, a preforming process is added, a bar stock is forged into a preforming piece with a special shape and structure, and then the forging piece with a required structure can be forged by gradually forging and stamping.
2. It adopts preforming process to replace the cake process of upsetting, compares the cake material, makes things convenient for the centre gripping of manipulator more, can not take place the collision between manipulator and the forging mould.
Description of the drawings:
FIG. 1 is a schematic structural diagram of a finished forged part to be forged according to the invention;
FIG. 2 is a schematic structural diagram of a upset cake in a conventional forging process;
FIG. 3 is a schematic view of a preform during forging of the invention;
FIG. 4 is a flow chart of the inventive forging method;
FIG. 5 is a schematic representation of the product resulting from the various steps in the forging method of the invention;
FIG. 6 is a schematic view of the structure of a preform during inventive forging;
FIG. 7 is a schematic structural view of a forming member during forging of the invention;
FIG. 8 is a first schematic view of simulation analysis preform forging shaping;
FIG. 9 is a second schematic view of simulation analysis preform forging shaping;
FIG. 10 is a third schematic view of simulation analysis preform forging shaping;
fig. 11 is a fourth schematic view of simulation analysis preform forging shaping.
In the figure: 1. a long round bar; 2. a bar stock; 3. a preform; 3', cake material; 4. a forming member; 5. a semi-finished piece; 6. a waste piece; 7. finished products; 10. forging a die; 20. a manipulator; 30. a KO column.
The specific implementation mode is as follows:
example (b): referring to fig. 4 to 7, a forging method of a high-precision bearing ring forging is as follows:
heating, namely gradually heating the long round rod 1 to raise the temperature of the long round rod 1 to 1100-1170 ℃;
secondly, blanking, namely cutting the heated long round bar 1 into a section of bar 2, wherein the diameter of the bar 2 is 34-36 mm, and the length of the bar 2 is 34-36 mm;
performing, namely stamping and forging the bar 2 into a circular preformed piece 3, wherein an upper concave platform which is concave downwards and is in a circular truncated cone shape is formed on the upper end surface of the preformed piece 3, and a lower convex platform which is opposite to the upper concave platform and is in a circular truncated cone shape is formed on the lower end surface of the preformed piece 3;
the distance H4 between the upper end face of the preform 3 and the lower end face of the preform 3 is 10-10.4 mm, the distance H3 between the upper end face of the preform 3 and the lower end face of the lower boss is 15.5-16 mm, and the diameter D4 of the outer ring of the preform 3 is 70.6-71.2 mm; the taper angle alpha of the inner wall of the upper concave table of the preformed piece 3 is 59.5-60.5 degrees, the taper angle beta of the outer wall of the lower convex table of the preformed piece 3 is 55-55.4 degrees, the diameter D6 of the lower end of the outer wall of the lower convex table is 33.1-33.5 mm, the diameter D5 of the upper end of the inner wall of the upper concave table is 62.8-63.2 mm, and the depth h of the upper concave table is 6.8-7.1 mm;
fourthly, reshaping, stamping and forging the preformed piece 3 again, forging the round formed piece 4, expanding the outer diameter of the formed piece 4, forging the shapes of the upper concave platform and the lower convex platform from a circular platform shape into a cylinder shape, reducing the diameter of the inner wall of the upper concave platform, and expanding the diameter of the outer wall of the lower convex platform;
the diameter D7 of the outer wall of the formed part 4 is 72.2-72.6 mm, the diameter D9 of the inner wall of the upper concave table of the formed part 4 is 39-39.5 mm, and the diameter D8 of the outer wall of the lower concave table of the formed part 4 is 52.5-53 mm;
bottom cutting, namely stamping and cutting the formed part 4, and punching along the inner wall of an upper concave table of the formed part 4 to obtain a semi-finished product part 5 and a waste material part 6;
performing ring rolling on the semi-finished product 5 to obtain a finished product 7;
the diameter D1 of the outer wall of the upper end of the finished piece 7 is 71.5mm, the diameter D2 of the outer wall of the lower end of the finished piece 7 is 52mm, the diameter D3 of the inner wall of the finished piece 7 is 38mm, the total height H1 of the finished piece 7 is 13.5mm, and the height H2 of the outer wall of the upper end of the finished piece 7 is 7 mm.
Preferably, an outer transition fillet is formed between the lower boss of the preform 3 and the lower end face of the preform 3.
Preferably, the outer circle of the bottom surface of the upper concave platform of the preform 3 is formed with an inner transition fillet.
Preferably, the finished part 7 consists of two circular rings at the upper end and the lower end, and the diameter of the inner wall of the ring at the upper end of the finished part 7 is equal to that of the ring at the lower end of the finished part 7.
Preferably, the inner wall of the upper end collar of the finished part 7 is formed with a conical guide hole.
The working principle is as follows: the invention relates to a forging method of a high-precision bearing ring forge piece, the traditional forging method of a bearing comprises heating, blanking, cake upsetting, forming, bottom cutting and rolling, and the traditional forging method can not forge a finished product piece 7 shown in figure 1;
the forging method of the invention comprises heating, blanking, preforming, reshaping, bottom cutting and rolling, the preforming process replaces the cake upsetting process, the bar 2 is processed into the formed part 3 shown in figure 3 instead of the cake 3 'shown in figure 2, compared with figures 2 and 3, the height of the cake 3' is smaller than the thickness of the formed part 3, and the manipulator 20 is conveniently lengthened after the formed part 3 is ejected out of the forging die 10 through the KO column 30;
meanwhile, the structure of the formed part 3 is simulated and analyzed by analysis simulation software, the simulation process is respectively shown in figures 8, 9, 10 and 11, and the finished part 7 shown in figure 1 can be obtained by forging.
The examples are intended to illustrate the invention, but not to limit it. The described embodiments may be modified by those skilled in the art without departing from the spirit and scope of the present invention, and therefore, the scope of the appended claims should be accorded the full scope of the invention as set forth in the appended claims.
Claims (5)
1. A forging method of a high-precision bearing ring forge piece comprises the following steps:
heating, namely gradually heating the long round rod (1) to realize that the temperature of the long round rod (1) is raised to 1100-1170 ℃;
secondly, blanking, namely cutting the heated long round bar (1) into a section of bar (2), wherein the diameter of the bar (2) is 34-36 mm, and the length of the bar (2) is 34-36 mm;
thirdly, performing, namely stamping and forging the bar (2) into a circular preformed piece (3), wherein an upper concave platform which is concave downwards and is in a circular truncated cone shape is formed on the upper end surface of the preformed piece (3), and a lower convex platform which is opposite to the upper concave platform and is in a circular truncated cone shape is formed on the lower end surface of the preformed piece (3);
the distance H4 between the upper end face of the preform (3) and the lower end face of the preform (3) is 10-10.4 mm, the distance H3 between the upper end face of the preform (3) and the lower end face of the lower boss is 15.5-16 mm, and the diameter D4 of the outer ring of the preform (3) is 70.6-71.2 mm; the taper angle alpha of the inner wall of the upper concave table of the preformed piece (3) is 59.5-60.5 degrees, the taper angle beta of the outer wall of the lower concave table of the preformed piece (3) is 55-55.4 degrees, the diameter D6 of the lower end of the outer wall of the lower convex table is 33.1-33.5 mm, the diameter D5 of the upper end of the inner wall of the upper concave table is 62.8-63.2 mm, and the depth h of the upper concave table is 6.8-7.1 mm;
fourthly, reshaping, stamping and forging the preformed piece (3) again, forging the formed piece (4) which is circular, expanding the outer diameter of the formed piece (4), forging the shapes of the upper concave platform and the lower convex platform from a circular platform shape into a cylinder shape, reducing the diameter of the inner wall of the upper concave platform, and expanding the diameter of the outer wall of the lower convex platform;
the diameter D7 of the outer wall of the formed part (4) is 72.2-72.6 mm, the diameter D9 of the inner wall of the upper concave table of the formed part (4) is 39-39.5 mm, and the diameter D8 of the outer wall of the lower concave table of the formed part (4) is 52.5-53 mm;
bottom cutting, namely stamping and cutting the formed part (4), and punching along the inner wall of an upper concave table of the formed part (4) to obtain a semi-finished product part (5) and a waste material part (6);
performing ring rolling on the semi-finished product (5) to obtain a finished product (7);
the diameter D1 of the outer wall of the upper end of the finished piece (7) is 71.5mm, the diameter D2 of the outer wall of the lower end of the finished piece (7) is 52mm, the diameter D3 of the inner wall of the finished piece (7) is 38mm, the total height H1 of the finished piece (7) is 13.5mm, and the height H2 of the outer wall of the upper end of the finished piece (7) is 7 mm.
2. The forging method of the high-precision bearing ring forging piece according to claim 1, wherein the forging method comprises the following steps: an outer transition fillet is formed between the lower boss of the preformed piece (3) and the lower end face of the preformed piece (3).
3. The forging method of the high-precision bearing ring forging piece as recited in claim 2, wherein: an inner transition fillet is formed on the outer ring of the bottom surface of the upper concave table of the preformed piece (3).
4. The forging method of the high-precision bearing ring forging piece according to claim 1, wherein the forging method comprises the following steps: the finished product (7) consists of two circular rings at the upper end and the lower end, and the diameter of the inner wall of the ring at the upper end of the finished product (7) is equal to that of the ring at the lower end of the finished product (7).
5. The forging method of the high-precision bearing ring forging piece as recited in claim 4, wherein the forging method comprises the following steps: the inner wall of the upper end ferrule of the finished product part (7) is formed with a conical guide hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110519650.7A CN113351821B (en) | 2021-05-13 | 2021-05-13 | Forging method of high-precision bearing ring forge piece |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110519650.7A CN113351821B (en) | 2021-05-13 | 2021-05-13 | Forging method of high-precision bearing ring forge piece |
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| CN113351821A true CN113351821A (en) | 2021-09-07 |
| CN113351821B CN113351821B (en) | 2022-10-21 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005211929A (en) * | 2004-01-29 | 2005-08-11 | Sanyo Special Steel Co Ltd | Method for producing unit bearing having good material yield with horizontal type forging machine |
| CN102581204A (en) * | 2012-02-15 | 2012-07-18 | 黄石哈特贝尔精密锻造有限公司 | Turriform forming process of internal and external rings of first-generation hub bearing |
| CN103341577A (en) * | 2013-07-19 | 2013-10-09 | 黄石哈特贝尔精密锻造有限公司 | Cold ring rolling forming process for asymmetric shape of hub bearing outer ring and closed cold rolling forming die |
| CN105057556A (en) * | 2015-08-14 | 2015-11-18 | 浙江五洲新春集团股份有限公司 | Forging molding process of bearing ring |
| CN108465770A (en) * | 2018-04-20 | 2018-08-31 | 洛阳Lyc轴承有限公司 | A kind of rational EMU bearing internal external circle forging forming method of streamline distribution |
| CN110180987A (en) * | 2019-06-27 | 2019-08-30 | 洛阳Lyc轴承有限公司 | The forging molding process of complex thin-wall annular forging piece |
| CN112404914A (en) * | 2020-10-29 | 2021-02-26 | 四川众友机械有限责任公司 | Forging processing technology of parking gear |
-
2021
- 2021-05-13 CN CN202110519650.7A patent/CN113351821B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005211929A (en) * | 2004-01-29 | 2005-08-11 | Sanyo Special Steel Co Ltd | Method for producing unit bearing having good material yield with horizontal type forging machine |
| CN102581204A (en) * | 2012-02-15 | 2012-07-18 | 黄石哈特贝尔精密锻造有限公司 | Turriform forming process of internal and external rings of first-generation hub bearing |
| CN103341577A (en) * | 2013-07-19 | 2013-10-09 | 黄石哈特贝尔精密锻造有限公司 | Cold ring rolling forming process for asymmetric shape of hub bearing outer ring and closed cold rolling forming die |
| CN105057556A (en) * | 2015-08-14 | 2015-11-18 | 浙江五洲新春集团股份有限公司 | Forging molding process of bearing ring |
| CN108465770A (en) * | 2018-04-20 | 2018-08-31 | 洛阳Lyc轴承有限公司 | A kind of rational EMU bearing internal external circle forging forming method of streamline distribution |
| CN110180987A (en) * | 2019-06-27 | 2019-08-30 | 洛阳Lyc轴承有限公司 | The forging molding process of complex thin-wall annular forging piece |
| CN112404914A (en) * | 2020-10-29 | 2021-02-26 | 四川众友机械有限责任公司 | Forging processing technology of parking gear |
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