CN210648070U - High-temperature carburizing steel thin-wall bearing ring shaping device - Google Patents
High-temperature carburizing steel thin-wall bearing ring shaping device Download PDFInfo
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- CN210648070U CN210648070U CN201921110455.3U CN201921110455U CN210648070U CN 210648070 U CN210648070 U CN 210648070U CN 201921110455 U CN201921110455 U CN 201921110455U CN 210648070 U CN210648070 U CN 210648070U
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- 238000007493 shaping process Methods 0.000 title claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 22
- 239000010959 steel Substances 0.000 title claims abstract description 22
- 238000005255 carburizing Methods 0.000 title description 3
- 238000003825 pressing Methods 0.000 claims abstract description 128
- 238000005520 cutting process Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 18
- 238000005496 tempering Methods 0.000 description 10
- 238000010791 quenching Methods 0.000 description 6
- 230000000171 quenching effect Effects 0.000 description 6
- 238000004513 sizing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
A shaping device of a high-temperature carburized steel thin-wall bearing ring relates to the technical field of bearing heat treatment and comprises a positioning bottom ring, an upper pressing die and a cylindrical lower pressing die, wherein the outer diameter of the cylindrical lower pressing die is matched with the inner diameter of a bearing ring; the positioning bottom ring is sleeved at the bottom end of the lower pressing die, and the gap between the positioning bottom ring and the lower pressing die is smaller than the thickness of the bearing ring; the lower pressing die is equally divided into a plurality of lower pressing modules along the radial direction of the lower pressing die, a cutting seam is arranged between every two adjacent lower pressing modules, and the center of the upper surface of the lower pressing die is provided with a tapered hole with a large upper part and a small lower part; the upper pressing die comprises a disc which is directly larger than the outer diameter of the bearing ring, the center of the lower surface of the disc is provided with a conical structure matched with the conical hole, the shaping device solves the problem of deformation and warpage of the high-temperature carburized bearing part after heat treatment, improves the precision machining precision and the size stability of the product, ensures the quality of the product, also improves the production efficiency and the yield, and reduces the waste of product materials.
Description
Technical Field
The utility model belongs to the technical field of the bearing heat treatment technique and specifically relates to a high temperature carburization steel thin-walled bearing ring shaping device is related to.
Background
As is known, the basic process flow of manufacturing a bearing ring is to obtain raw materials, forge, anneal, turn, heat treat, inspect and grind, wherein the heat treat is a key processing procedure for improving the inherent quality of the bearing ring; the G13Cr4Mo4Ni4V steel belongs to common high-temperature carburized bearing steel, after carburization heat treatment, the surface hardness of a part is high, the core hardness is relatively low, so that the part has high impact toughness and simultaneously has the characteristics of high hardness, high temperature resistance, high dimensional stability and high contact fatigue life, the part is generally used for a main shaft of an aeroengine at present, along with the rapid development of the aeroindustry, the bearing structure is more complex than before, and a large number of thin-wall high-temperature carburized bearing steel bearing rings appear;
the bearing ring inevitably generates heat treatment deformation due to factors such as thermal stress, structure transformation and the like in the heat treatment process, the deformation rate reaches 100 percent through carburizing primary quenching and secondary quenching, and the deformation exceeding amount can reach 200 to 300 percent; in the prior art, a high-temperature carburized bearing steel bearing ring is manually reshaped after being quenched, the requirement on the technical level of personnel is high, the processing qualified rate of products cannot be guaranteed, the processing qualified rate of manual reshaping is less than 60%, the processing of the products is severely restricted, and an effective reshaping device is not available in the prior art.
Disclosure of Invention
In order to overcome the not enough among the background art, the utility model discloses a high temperature carburization steel thin wall bearing ring shaping device can effectively solve the deformation problem after the bearing ring thermal treatment, guarantees that product quality reaches the qualification standard.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a shaping device for a high-temperature carburized steel thin-wall bearing ring comprises a positioning bottom ring, an upper pressing die and a cylindrical lower pressing die, wherein the outer diameter of the cylindrical lower pressing die is matched with the inner diameter of the bearing ring; the positioning bottom ring is sleeved at the bottom end of the lower pressing die, and the gap between the positioning bottom ring and the lower pressing die is smaller than the thickness of the bearing ring; the lower pressing die is equally divided into a plurality of lower pressing modules along the radial direction of the lower pressing die, a cutting seam is arranged between every two adjacent lower pressing modules, and the center of the upper surface of the lower pressing die is provided with a tapered hole with a large upper part and a small lower part; the upper pressing die comprises a disc which is directly larger than the outer diameter of the bearing ring, a conical structure matched with the conical hole is arranged in the center of the lower surface of the disc, and when the conical structure is matched with the conical hole, the distance between the lower surface of the disc of the upper pressing die and the upper surface of the positioning bottom ring is equal to the sum of the heights of the bearing rings.
Furthermore, the center of the upper surface of the disc of the upper pressing die is provided with a threaded connecting hole.
Further, the outer wall of the lower pressing die is uniformly provided with a plurality of axial oil guide grooves.
Further, the lower pressing die is equally divided into three lower pressing die blocks.
Furthermore, the taper angle of the taper hole of the lower pressing die is 20-40 degrees.
Furthermore, the ratio of the width of the cutting seam between two adjacent pressing modules to the diameter of the pressing module is 1: 40-70.
Further, the lower surface of the positioning bottom ring is flush with the lower surface of the lower pressing die, and the height of the lower pressing die is the sum of the height of the positioning bottom ring and the height of the two bearing rings.
Further, the tapered hole of the lower die is set to be a tapered through hole.
Furthermore, the inner diameter of the positioning bottom ring is 0.8-1.2 mm larger than the outer diameter of the lower pressing die.
Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:
the utility model discloses a shaping device, the shaping device disclosed by the invention, when the upper pressing die is pressed down and is completely matched with the lower pressing die, a plurality of pressing modules of the lower pressing die are synchronously pushed outwards to a certain degree, so that the outer wall of the pressing module is butted with the inner wall of the bearing ring and is supported to the designed inner diameter size, and meanwhile, the distance between the lower surface of the upper pressing die disc and the upper surface of the positioning bottom ring just presses a plurality of bearing rings to the designed height size; by utilizing the shaping device, the problem of deformation and warpage of the high-temperature carburized bearing part after heat treatment is solved, the precision and size stability of the finished product are improved, the quality of the product is ensured, the production efficiency and yield are also improved, and the waste of product materials is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic top view of the lower die of fig. 1.
In the figure: 1. pressing the die; 2. pressing a die; 3. a bearing ring; 4. and positioning the bottom ring.
Detailed Description
The present invention will be explained in detail by the following embodiments, and the purpose of the disclosed invention is to protect all technical improvements within the scope of the present invention, and the present invention is not limited to the following embodiments; in the description of the present invention, it should be understood that, if there is an orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., it is only corresponding to the drawings of the present application, and for the convenience of describing the present invention, it is not intended to indicate or imply that the indicated device or element must have a particular orientation:
the shaping device of the high-temperature carburized steel thin-wall bearing ring combined with the attached drawings 1-2 comprises a positioning bottom ring 4, an upper pressing die 1 and a cylindrical lower pressing die 2 with the outer diameter matched with the inner diameter of a bearing ring 3, and preferably, a plurality of axial oil guide grooves are uniformly formed in the outer wall of the lower pressing die 2, so that lubrication is facilitated;
the positioning bottom ring 4 is sleeved at the bottom end of the lower pressing die 2, and the gap between the positioning bottom ring and the lower pressing die 2 is smaller than the thickness of the bearing ring 3, so that the lower pressing die 2 can be ensured to be in sufficient end face contact with the bearing ring 3, and the bearing ring 3 can be prevented from warping; according to the requirement, the inner diameter of the positioning bottom ring 4 is 0.8-1.2 mm larger than the outer diameter of the lower pressing die 2, and the inner diameter of the shaped bearing ring 3 is determined by the opening degree of the lower pressing die 2 when the upper pressing die 1 and the lower pressing die 2 are completely matched, so that the inner diameter of the positioning bottom ring 4 is slightly larger than the lower pressing die 2 at the moment, and the positioning and correcting effects are achieved;
the lower pressing die 2 is equally divided into a plurality of lower pressing modules along the radial direction, a cutting seam is arranged between every two adjacent lower pressing modules, the outer diameter of the lower pressing die 2 is generally larger than the inner diameter of the bearing ring before shaping, and the cutting seam has the function of gathering the plurality of lower pressing modules towards the center so as to be convenient for sleeving the bearing ring; in addition, the lower pressing die 2 is equally divided into three lower pressing modules, so that the number of cutting seams is reduced and the shaping precision is improved while the lower pressing modules are enabled to move and expand to achieve the shaping effect, preferably, the ratio of the width of the cutting seam between every two adjacent lower pressing modules to the diameter of the lower pressing die 2 is 1: 40-70, the bearing ring is convenient to sleeve, the width of the cutting seam is not too wide, and the dimensional precision after shaping is influenced; the center of the upper surface of the lower pressing die 2 is provided with a tapered hole with a large upper part and a small lower part, the tapered hole is convenient for the downward pressing module to synchronously and smoothly move outwards when the upper pressing die 1 is pressed down, in addition, the tapered hole can be set as a slotted hole or a tapered through hole, the tapered through hole is more convenient to process, and the matching precision of the upper pressing die 1 and the lower pressing die 2 is convenient to control; according to the requirement, the taper angle of the tapered hole of the lower pressing die 2 is 20-40 degrees, the gradual degree of the shaping deformation of the bearing ring is related to the pressing speed of the upper pressing die 1 and the taper angle of the tapered hole of the lower pressing die 2, and the shaping effect can be influenced by adjusting the proper taper angle;
the upper pressing die 1 comprises a disc which is directly larger than the outer diameter of the bearing ring 3, the center of the lower surface of the disc is provided with a conical structure matched with the conical hole, and the conical structure can enable a plurality of pressing modules of the pressing die to be synchronously pushed outwards to a certain extent, so that the outer wall of each pressing module is abutted against the inner wall of the bearing ring and the pressing modules are supported to the designed inner diameter size; the upper pressing die 1 is matched with a manual press machine or a hydraulic press machine for use, a threaded connecting hole is formed in the center of the upper surface of a disc of the upper pressing die 1, the upper pressing die is conveniently connected with the press machine for positioning, and preferably, the upper pressing die 1 is always coaxial with the positioning bottom ring 4 in the pressing process; when the conical structure is matched with the conical hole, the distance between the lower surface of the disc of the upper pressing die 1 and the upper surface of the positioning bottom ring 4 is equal to the sum of the heights of the plurality of bearing rings 3, so that the diameter and the height of the bearing rings are shaped in one step, and the phenomenon of deformation and warping can be prevented; further, when the lower surface of the positioning bottom ring 4 is flush with the lower surface of the lower die 2, that is, the height of the lower die 2 can be defined as the sum of the height of the positioning bottom ring 4 and the height of the plurality of bearing rings 3, the number of the bearing rings 3 can be set to one, two, or three.
The first embodiment of the specific shaping method:
thin-walled bearing ring, material: g13Cr4Mo4Ni4V, the outer diameter phi 215mm (phi 215.9mm before carburization), the inner diameter phi 206mm (phi 205.2mm before carburization), the height 24mm (height 25.4 before carburization), and the wall thickness 4.5 mm; the method comprises the following steps: the deformation is less than or equal to 0.25mm, and the warpage is less than or equal to 0.35 mm;
s1, preparation shaping: the step needs to prepare a high-temperature carburized steel thin-wall bearing ring shaping device, fix the positioning bottom ring 4 on a plane, correspondingly place the lower pressing die 2 into the inner ring of the positioning bottom ring 4, and draw down a plurality of lower pressing modules of the lower pressing die 2 towards the center to eliminate the joint cutting gap for standby;
the sizing device for sizing two bearing rings at a time and having a total height of 50.8mm is as follows:
and (3) pressing die 1: the cone is matched with the lower pressing die 2 for use, and the cone angle of the cone structure is 15 degrees;
a lower die 2: the height is 64.8mm, the outer diameter phi is 205.2mm, the taper angle of the conical hole is 15 degrees, and the conical hole is matched with the upper pressing die;
positioning the bottom ring 4: the height is 14mm, and the inner diameter is 206.2 mm;
s2, quenching: respectively keeping the temperature of the bearing ring in a vacuum furnace at 650 ℃ and 850 ℃ for 30min, heating to the process temperature of 1070 ℃ after heat preservation, keeping the temperature for 45min, and cooling with oil, wherein the tapping temperature is about 120 ℃;
s3, shaping: after quenching, sleeving the bearing ring from the top end of the lower pressing die 2, pressing the upper pressing die 1 by using a press machine, tightly matching with the lower pressing die 2, and shaping the bearing ring by using the internal supporting force of the bearing ring by outwards synchronously moving a plurality of pressing modules of the lower pressing die 2 and the pressure of a disc of the upper pressing die 1 and a positioning bottom ring 4 on the end surface of the bearing ring;
s4, tempering and cold treatment: taking out the shaped bearing ring from the shaping device, and sequentially carrying out primary tempering, primary cold treatment, secondary tempering, secondary cold treatment and tertiary tempering; the temperature of each cold treatment process is-75 ℃, and the time is 2.5 h; the temperature of each tempering process is 540 ℃, and the time is 2.5 hours;
s5, detection: and (3) detecting the bearing ring, wherein the deformation of the product is within 0.20mm, the warpage is within 0.25mm, the qualified rate can reach 100%, and transferring the qualified product to the next process.
Embodiment two of the specific shaping method:
thin-walled bearing ring, material: g13Cr4Mo4Ni4V, the outer diameter phi is 250mm (phi 251.2mm before carburization), the inner diameter phi is 240.1mm (phi 239.2mm before carburization), the height is 24mm (height 25.2 before carburization), and the wall thickness is 5.0 mm; the method comprises the following steps: the deformation is less than or equal to 0.30mm, and the warpage is less than or equal to 0.35 mm;
s1, preparation shaping: the step needs to prepare a high-temperature carburized steel thin-wall bearing ring shaping device, fix the positioning bottom ring 4 on a plane, correspondingly place the lower pressing die 2 into the inner ring of the positioning bottom ring 4, and draw down a plurality of lower pressing modules of the lower pressing die 2 towards the center to eliminate the joint cutting gap for standby;
the sizing device for sizing two bearing rings at a time and having a total height of 50.4mm is as follows:
and (3) pressing die 1: the cone is matched with the lower pressing die 2 for use, and the cone angle of the cone structure is 15 degrees;
a lower die 2: the height is 64.4mm, the outer diameter phi is 239.2mm, the taper angle of the tapered hole is 15 degrees, and the tapered hole is matched with the upper die;
positioning the bottom ring 4: the height is 14mm, and the inner diameter is 240.2 mm;
s2, quenching: respectively keeping the temperature of the bearing ring in a vacuum furnace at 650 ℃ and 850 ℃ for 30min, heating to the process temperature of 1070 ℃ after heat preservation, keeping the temperature for 45min, and cooling with oil, wherein the tapping temperature is about 125 ℃;
s3, shaping: after quenching, sleeving the bearing ring from the top end of the lower pressing die 2, pressing the upper pressing die 1 by using a press machine, tightly matching with the lower pressing die 2, and shaping the bearing ring by using the internal supporting force of the bearing ring by outwards synchronously moving a plurality of pressing modules of the lower pressing die 2 and the pressure of a disc of the upper pressing die 1 and a positioning bottom ring 4 on the end surface of the bearing ring;
s4, tempering and cold treatment: taking out the shaped bearing ring from the shaping device, and sequentially carrying out primary tempering, primary cold treatment, secondary tempering, secondary cold treatment and tertiary tempering; the temperature of each cold treatment process is-75 ℃, and the time is 2.5 h; the temperature of each tempering process is 540 ℃, and the time is 2.5 hours;
s5, detection: and (3) detecting the bearing ring, wherein the deformation of the product is within 0.20mm, the warpage is within 0.28mm, the qualified rate can reach 100%, and the qualified product is handed over to the next procedure.
The part of the utility model not detailed is prior art.
Claims (9)
1. The utility model provides a high temperature carburization steel thin wall bearing ring shaping device which characterized in that: comprises a positioning bottom ring (4), an upper pressing die (1) and a cylindrical lower pressing die (2) with the outer diameter matched with the inner diameter of a bearing ring (3); the positioning bottom ring (4) is sleeved at the bottom end of the lower pressing die (2), and the gap between the positioning bottom ring and the lower pressing die (2) is smaller than the thickness of the bearing ring (3); the lower pressing die (2) is equally divided into a plurality of lower pressing modules along the radial direction, a cutting seam is arranged between every two adjacent lower pressing modules, and the center of the upper surface of the lower pressing die (2) is provided with a tapered hole with a large upper part and a small lower part; the upper pressing die (1) comprises a disc which is directly larger than the outer diameter of the bearing ring (3), a conical structure matched with the conical hole is arranged in the center of the lower surface of the disc, and when the conical structure is matched with the conical hole, the distance between the lower surface of the disc of the upper pressing die (1) and the upper surface of the positioning bottom ring (4) is equal to the sum of the heights of the bearing rings (3).
2. The device for shaping a high-temperature carburized steel thin-walled bearing ring according to claim 1, characterized in that: and a threaded connecting hole is formed in the center of the upper surface of the disc of the upper pressing die (1).
3. The device for shaping a high-temperature carburized steel thin-walled bearing ring according to claim 1, characterized in that: the outer wall of the lower pressing die (2) is uniformly provided with a plurality of axial oil guide grooves.
4. The device for shaping a high-temperature carburized steel thin-walled bearing ring according to claim 1, characterized in that: the lower pressing die (2) is equally divided into three lower pressing modules.
5. The device for shaping a high-temperature carburized steel thin-walled bearing ring according to claim 1, characterized in that: the taper angle of the taper hole of the lower pressing die (2) is 20-40 degrees.
6. The device for shaping a high-temperature carburized steel thin-walled bearing ring according to claim 1, characterized in that: the ratio of the width of the cutting seam between two adjacent pressing modules to the diameter of the pressing die (2) is 1: 40-70.
7. The device for shaping a high-temperature carburized steel thin-walled bearing ring according to claim 1, characterized in that: the lower surface of the positioning bottom ring (4) is flush with the lower surface of the lower pressing die (2), and the height of the lower pressing die (2) is the sum of the height of the positioning bottom ring (4) and the heights of the two bearing rings (3).
8. The device for shaping a high-temperature carburized steel thin-walled bearing ring according to claim 1, characterized in that: the conical hole of the lower pressing die (2) is set as a conical through hole.
9. The device for shaping a high-temperature carburized steel thin-walled bearing ring according to claim 1, characterized in that: the inner diameter of the positioning bottom ring (4) is 0.8-1.2 mm larger than the outer diameter of the lower pressing die (2).
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| CN201921110455.3U CN210648070U (en) | 2019-07-16 | 2019-07-16 | High-temperature carburizing steel thin-wall bearing ring shaping device |
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| CN201921110455.3U CN210648070U (en) | 2019-07-16 | 2019-07-16 | High-temperature carburizing steel thin-wall bearing ring shaping device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202060A (en) * | 2019-07-16 | 2019-09-06 | 洛阳Lyc轴承有限公司 | A kind of H10Cr4Mo4Ni4V thin-wall bearing ferrule apparatus for shaping and its shaping methods |
| CN113351811A (en) * | 2021-05-12 | 2021-09-07 | 苏州市东盛锻造有限公司 | Annular forging processing method based on numerical control automatic hydraulic ring rolling mill |
-
2019
- 2019-07-16 CN CN201921110455.3U patent/CN210648070U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202060A (en) * | 2019-07-16 | 2019-09-06 | 洛阳Lyc轴承有限公司 | A kind of H10Cr4Mo4Ni4V thin-wall bearing ferrule apparatus for shaping and its shaping methods |
| CN113351811A (en) * | 2021-05-12 | 2021-09-07 | 苏州市东盛锻造有限公司 | Annular forging processing method based on numerical control automatic hydraulic ring rolling mill |
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Address after: 471039 No. 96, Jianxi, Luoyang District, Henan, Jianshe Road Patentee after: Luoyang Bearing Group Co.,Ltd. Country or region after: China Address before: 471039 No. 96, Jianxi, Luoyang District, Henan, Jianshe Road Patentee before: LUOYANG LYC BEARING Co.,Ltd. Country or region before: China |
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