CN114227176A - Bearing pad machining method - Google Patents
Bearing pad machining method Download PDFInfo
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- CN114227176A CN114227176A CN202111669814.0A CN202111669814A CN114227176A CN 114227176 A CN114227176 A CN 114227176A CN 202111669814 A CN202111669814 A CN 202111669814A CN 114227176 A CN114227176 A CN 114227176A
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- inner hole
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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
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Abstract
The invention relates to a bearing pad processing method, which aims to solve the problems that in the prior art, the processing difficulty is increased and the size precision of a pad is difficult to ensure because the wall thickness of the pad meets the tolerance requirement of 0.01mm within the length range of 150mm of a bearing pad, and the technical problem is solved by the following scheme: the method comprises the following steps: preparing a blank; step two: turning; step three: pouring bearing alloy; step four: semi-finish turning; step five: aging treatment; step six: finely turning the end face; step seven: scribing; step eight: performing linear cutting machining; step nine: turning an inner hole; step ten: processing the inclined plane and the radiation plane of the arc-shaped body according to the contour line in the step seven by using linear cutting equipment; step eleven: processing a back arc and a positioning hole; step twelve: the invention discloses grinding treatment, and belongs to the field of machining.
Description
Technical Field
The invention relates to a bearing block machining method, in particular to a bearing block machining method, and belongs to the field of machining.
Background
Four bearing pads of a certain steam turbine set are installed in a bearing shell, each bearing pad is hung on oil retaining rings on two sides through two cylindrical pins, and the back arcs of the pads and the inner holes are eccentric, so that the back arcs of the pads are in line contact with the shell, and the pads can freely swing in the shell. The single size of the inner hole of the tile is as follows
The size of an inner hole in the middle of two tile blocks in the 45-degree direction after assembly is required to be equal to
According to the design principle, the assembly dimensional tolerance is only 0.02mm, and the wall thickness precision of a tile single piece is required to be controlled within 0.01 mm. And because the back arc and the inner hole are of eccentric structures, the wall thickness of the tile within the length range of 150mm is ensured to meet the tolerance requirement of 0.01mm, the processing difficulty is greatly increased, and the size precision of the tile is difficult to ensure.
Disclosure of Invention
The invention aims to solve the problems that in the length range of 150mm of a bearing pad block in the prior art, the wall thickness of the pad block meets the tolerance requirement of 0.01mm, the processing difficulty is increased, and the size precision of the pad block is difficult to ensure, and further provides a bearing pad block processing method.
The technical problem is solved by the following scheme:
the method comprises the following steps: preparing a blank, wherein the outer circular surface of the blank is a circular forging;
step two: turning: turning the inner hole of the forge piece, and roughly machining the excircle and the end face of the forge piece;
step three: pouring bearing alloy at the inner hole of the forging;
step four: semi-finish turning: semi-finish turning an inner hole, an outer circle and an end face, wherein machining allowance is reserved on each face;
step five: aging treatment: placing the workpiece subjected to semi-finish turning in the fourth step for 72 hours at the temperature of 15-30 ℃;
step six: finish turning the end face, and half finish turning the inner hole and the outer circle: machining an outer circular surface by taking the inner hole as a reference, reserving milling allowance, and accurately turning an end surface; finely turning an inner hole, and reserving machining allowance to ensure that the perpendicularity of the inner hole and the end face is less than or equal to 0.01 mm; the speed of a rotating shaft of the lathe is 200r/min, and the feeding amount of the lathe is 0.2-0.5 mm;
step seven: scribing: marking a central cross line on the end face of one side of the workpiece, and marking the contour line of the tile and the central line of a positioning pin hole at the position of 45 degrees at two ends of the tile;
step eight: wire cutting machining: processing a workpiece by using linear cutting equipment, and equally dividing the annular cylinder into four arc-shaped bodies;
step nine: turning an inner hole: clamping the arc-shaped body subjected to linear cutting on a lathe by using a clamp, and finely turning the inner hole of the arc-shaped body to be accurate by taking the end face and the inner hole as references; the speed of a rotating shaft of the lathe is 200r/min, and the feeding amount of the lathe is 0.2-0.5 mm;
step ten: processing the inclined plane and the radiation plane of the arc-shaped body according to the contour line in the step seven by using linear cutting equipment;
step eleven: processing a back arc and a positioning hole: calculating the thickness of the tile according to the size of an inner hole of a bearing shell, milling the back arc of an arc workpiece by taking the inner hole as a positioning reference, so that the processed arc meets the requirements of the bearing tile, the rotating shaft speed of a milling machine is 4000r/min, the feeding amount of the milling machine is 0.1-0.2 mm, the clamping position of the tile is unchanged, and drilling and reaming positioning pin holes on two sides of the tile;
step twelve: and (5) grinding, namely polishing the bearing pad block processed in the step eleven by using a bench worker.
Compared with the prior art, the invention has the following beneficial effects:
1. the key step of the tile is processed by utilizing the advantage that the parts processed by the wire cut electric discharge machine tool have no organic stress and the high precision of a numerical control processing center. Is convenient to popularize and use
2. The utility model provides a single size precision can guarantee the uniformity of four bearing pads of same group's pad under the condition that satisfies the designing requirement after the bearing pad processing for can satisfy the requirement of designing size equally after the assembly, and can realize freely swinging in the bearing housing after the bearing pad is packed into the bearing housing. Finally, the technical scheme of the bearing pad block is completed so as to achieve the purpose of automatically processing the bearing pad block.
Drawings
FIG. 1 is a schematic view of the location of four bearing pads mounted in the bearing housing bore.
FIG. 2 is a side schematic view of a bearing pad.
Fig. 3 is a schematic view of four arc-shaped bodies a mounted on a special fixture after wire cutting.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 3, and the bearing pad machining method is realized according to the following steps:
the method comprises the following steps: preparing a blank, wherein the outer circular surface of the blank is a circular forging;
step two: turning: turning the inner hole of the forge piece, and roughly machining the excircle and the end face of the forge piece;
step three: pouring bearing alloy at the inner hole of the forging;
step four: semi-finish turning: semi-finish turning an inner hole, an outer circle and an end face, wherein machining allowance is reserved on each face;
step five: aging treatment: placing the workpiece subjected to semi-finish turning in the fourth step for 72 hours at the temperature of 15-30 ℃;
step six: finish turning the end face, and half finish turning the inner hole and the outer circle: machining an outer circular surface by taking the inner hole as a reference, reserving milling allowance, and accurately turning an end surface; finely turning an inner hole, and reserving machining allowance to ensure that the perpendicularity of the inner hole and the end face is less than or equal to 0.01 mm; the speed of a rotating shaft of the lathe is 200r/min, and the feeding amount of the lathe is 0.2-0.5 mm;
step seven: scribing: marking a central cross line on the end face of one side of the workpiece, and marking the contour line of the tile and the central line of a positioning pin hole at the position of 45 degrees at two ends of the tile;
step eight: wire cutting machining: processing a workpiece by using linear cutting equipment, and equally dividing the annular cylinder into four arc-shaped bodies;
step nine: turning an inner hole: clamping the arc-shaped body subjected to linear cutting on a lathe by using a clamp, and finely turning the inner hole of the arc-shaped body to be accurate by taking the end face and the inner hole as references; the speed of a rotating shaft of the lathe is 200r/min, and the feeding amount of the lathe is 0.2-0.5 mm; and 4 arc-shaped bodies are clamped by using a special clamp simultaneously, so that the consistency of the size of the inner hole is ensured.
Step ten: processing the inclined plane and the radiation plane of the arc-shaped body according to the contour line in the step seven by using linear cutting equipment;
step eleven: processing a back arc and a positioning hole: calculating the thickness of the tile according to the size of an inner hole of a bearing shell, milling the back arc of an arc workpiece by taking the inner hole as a positioning reference, so that the processed arc meets the requirements of the bearing tile, the rotating shaft speed of a milling machine is 4000r/min, the feeding amount of the milling machine is 0.1-0.2 mm, the clamping position of the tile is unchanged, and drilling and reaming positioning pin holes on two sides of the tile;
step twelve: and (5) grinding, namely polishing the bearing pad block processed in the step eleven by using a bench worker.
The second embodiment is as follows: the embodiment is described with reference to fig. 1-2, and the bearing pad machining method according to the embodiment includes the steps of semi-finish turning an inner hole of a forged piece in the fourth step, wherein a machining allowance of 2mm is reserved on the radius of the inner hole, a machining allowance of 1mm is reserved on the radius of an outer circle, and the machining allowance of each end face is 0.5 mm. Other components and connection modes are the same as those of the first embodiment.
The third concrete implementation mode: in the bearing pad processing method according to the embodiment, the machining allowance of the radius of the outer circle of the finish-turned forged piece is 0.5mm in the sixth step, and the machining allowance of the radius of the inner hole is 1.5mm in the sixth step. Other components and connection modes are the same as those of the first embodiment.
The fourth concrete implementation mode: in the bearing pad machining method according to the present embodiment, the lathe is turned by a normal lathe in the second step, which is described with reference to fig. 1 to 2. Other components and connection modes are the same as those of the first embodiment.
The fifth concrete implementation mode: the embodiment is described with reference to fig. 1-2, and the bearing pad machining method in the embodiment includes that the fourth step, the sixth step and the ninth step are common numerically controlled lathes, the model is CK6163, and the radial run-out of the central line of the spindle taper hole is less than or equal to 0.02 mm; finely turning the geometric precision of the excircle, wherein the ovality is less than or equal to 0.02 mm; the taper is less than or equal to 0.02mm/300, and the axial movement of the main shaft is less than or equal to 0.02 mm. Other components and connection modes are the same as those of the first embodiment.
The sixth specific implementation mode: in the bearing pad machining method according to the present embodiment, the wire cutting device used in step eight and step ten is a wire electric discharge machine, and the wire electric discharge machine is used for reducing the mechanical stress by using the wire electric discharge machine for a plurality of times. Other components and connection modes are the same as those of the first embodiment.
The seventh embodiment: in the bearing pad machining method according to the present embodiment, the apparatus used in the eleventh step is a five-axis linkage machining center, and this embodiment is described with reference to fig. 1 to 2. The model is DMU210, the wall thickness of the tile is obtained by actually measuring the size of an inner hole of the bearing shell through a formula calculation, and a back arc is processed according to the calculated size to meet the design requirement. And processing the positioning pin hole in the same clamping mode, so that the position degree of the tile positioning pin hole and the back arc meets the assembly requirement. Other components and connection modes are the same as those of the first embodiment.
Claims (7)
1. A bearing pad processing method is characterized in that: the method is realized according to the following steps:
the method comprises the following steps: preparing a blank, wherein the outer circular surface of the blank is a circular forging;
step two: turning: turning the inner hole of the forge piece, and roughly machining the excircle and the end face of the forge piece;
step three: pouring bearing alloy at the inner hole of the forging;
step four: semi-finish turning: semi-finish turning an inner hole, an outer circle and an end face, wherein machining allowance is reserved on each face;
step five: aging treatment: placing the workpiece subjected to semi-finish turning in the fourth step for 72 hours at the temperature of 15-30 ℃;
step six: finish turning the end face, and half finish turning the inner hole and the outer circle: machining an outer circular surface by taking the inner hole as a reference, reserving milling allowance, and accurately turning an end surface; finely turning an inner hole, and reserving machining allowance to ensure that the perpendicularity of the inner hole and the end face is less than or equal to 0.01 mm; the speed of a rotating shaft of the lathe is 200r/min, and the feeding amount of the lathe is 0.2-0.5 mm;
step seven: scribing: marking a central cross line on the end face of one side of the workpiece, and marking the contour line of the tile and the central line of a positioning pin hole at the position of 45 degrees at two ends of the tile;
step eight: wire cutting machining: processing a workpiece by using linear cutting equipment, and equally dividing the annular cylinder into four arc-shaped bodies;
step nine: turning an inner hole: clamping the arc-shaped body subjected to linear cutting on a lathe by using a clamp, and finely turning the inner hole of the arc-shaped body to be accurate by taking the end face and the inner hole as references; the speed of a rotating shaft of the lathe is 200r/min, and the feeding amount of the lathe is 0.2-0.5 mm;
step ten: processing the inclined plane and the radiation plane of the arc-shaped body according to the contour line in the step seven by using linear cutting equipment;
step eleven: processing a back arc and a positioning hole: calculating the thickness of the tile according to the size of an inner hole of a bearing shell, milling the back arc of an arc workpiece by taking the inner hole as a positioning reference, so that the processed arc meets the requirements of the bearing tile, the rotating shaft speed of a milling machine is 4000r/min, the feeding amount of the milling machine is 0.1-0.2 mm, the clamping position of the tile is unchanged, and drilling and reaming positioning pin holes on two sides of the tile;
step twelve: and (5) grinding, namely polishing the bearing pad block processed in the step eleven by using a bench worker.
2. The bearing block machining method according to claim 1, characterized in that: and in the fourth step, the inner hole of the forged piece is machined by semi-finish turning, the radius of the inner hole is reserved with machining allowance of 2mm, the radius of the excircle is reserved with machining allowance of 1mm, and the machining allowance of each end face is 0.5 mm.
3. The bearing block machining method according to claim 1, characterized in that: and in the sixth step, the radius of the excircle of the forged piece is finely turned, and the machining allowance is kept at 0.5mm, and the radius of the inner hole is kept at 1.5 mm.
4. The bearing pad machining method according to claim 1, characterized in that: and in the second step, the lathe is processed by a common lathe.
5. The bearing block machining method according to claim 1, characterized in that: step four, step six and step nine lathes are ordinary numerical control lathes, the radial run-out of the central line of the taper hole of the main shaft is less than or equal to 0.02 mm; finely turning the geometric precision of the excircle, wherein the ovality is less than or equal to 0.02 mm; the taper is less than or equal to 0.02mm/300, and the axial movement of the main shaft is less than or equal to 0.02 mm.
6. The bearing block machining method according to claim 1, characterized in that: and the wire cutting equipment used in the step eight and the step ten is an electric spark wire cutting machine, and the wire cutting machine is used for multiple times to reduce the stress of the machine.
7. The bearing block machining method according to claim 1, characterized in that: and the equipment used in the eleventh step is a five-axis linkage machining center.
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| CN202111669814.0A CN114227176B (en) | 2021-12-30 | 2021-12-30 | Bearing pad processing method |
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| CN202111669814.0A CN114227176B (en) | 2021-12-30 | 2021-12-30 | Bearing pad processing method |
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| CN114227176B CN114227176B (en) | 2023-09-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114669787A (en) * | 2022-04-15 | 2022-06-28 | 中国葛洲坝集团机械船舶有限公司 | Large-scale cambered surface machining method |
| CN116038260A (en) * | 2023-02-16 | 2023-05-02 | 浙江彰贵轴承科技有限公司 | Machining process for high-speed radial tilting pad supporting bearing guide pad |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003013959A (en) * | 2001-06-28 | 2003-01-15 | Koyo Seiko Co Ltd | Steel balls used for rolling bearing and its manufacturing method |
| CN102072250A (en) * | 2011-01-14 | 2011-05-25 | 南京航空航天大学 | Homopolar type radial magnetic suspension bearing and manufacturing method thereof |
| CN102259255A (en) * | 2011-03-23 | 2011-11-30 | 黄浩杨 | Method for machining tilting type bearing bush |
| CN106312469A (en) * | 2016-11-16 | 2017-01-11 | 陕西启源科技发展有限责任公司 | Machining method for eccentric bushing of sliding bearing |
| CN106346206A (en) * | 2016-11-15 | 2017-01-25 | 陕西高华知本化工科技有限公司 | Processing method of eccentric bushing of sliding bearing |
| CN107775281A (en) * | 2016-08-29 | 2018-03-09 | 方芳 | A kind of bearing washer processing technology |
| CN108067836A (en) * | 2016-11-18 | 2018-05-25 | 贵州弘润实业发展有限公司 | A kind of processing technology of bearing |
| CN110270800A (en) * | 2019-07-04 | 2019-09-24 | 哈尔滨汽轮机厂有限责任公司 | The processing method that a kind of whirlpool increases bearing |
| CN113245794A (en) * | 2021-05-30 | 2021-08-13 | 东风汽车车轮随州有限公司 | Gapless elastic bearing bush of rolling die and machining method thereof |
-
2021
- 2021-12-30 CN CN202111669814.0A patent/CN114227176B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003013959A (en) * | 2001-06-28 | 2003-01-15 | Koyo Seiko Co Ltd | Steel balls used for rolling bearing and its manufacturing method |
| CN102072250A (en) * | 2011-01-14 | 2011-05-25 | 南京航空航天大学 | Homopolar type radial magnetic suspension bearing and manufacturing method thereof |
| CN102259255A (en) * | 2011-03-23 | 2011-11-30 | 黄浩杨 | Method for machining tilting type bearing bush |
| CN107775281A (en) * | 2016-08-29 | 2018-03-09 | 方芳 | A kind of bearing washer processing technology |
| CN106346206A (en) * | 2016-11-15 | 2017-01-25 | 陕西高华知本化工科技有限公司 | Processing method of eccentric bushing of sliding bearing |
| CN106312469A (en) * | 2016-11-16 | 2017-01-11 | 陕西启源科技发展有限责任公司 | Machining method for eccentric bushing of sliding bearing |
| CN108067836A (en) * | 2016-11-18 | 2018-05-25 | 贵州弘润实业发展有限公司 | A kind of processing technology of bearing |
| CN110270800A (en) * | 2019-07-04 | 2019-09-24 | 哈尔滨汽轮机厂有限责任公司 | The processing method that a kind of whirlpool increases bearing |
| CN113245794A (en) * | 2021-05-30 | 2021-08-13 | 东风汽车车轮随州有限公司 | Gapless elastic bearing bush of rolling die and machining method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 徐纪高;李艳;: "可倾瓦轴承体加工工艺分析与改进", 风机技术, no. 06, pages 61 - 64 * |
| 程萍;张远海;: "可倾轴瓦块的加工和测量技术研究", 制造技术与机床, no. 03, pages 118 - 121 * |
| 陈建学: "薄壁弹性双金属轴瓦的浇铸及加工工艺", 航空制造技术, no. 01, pages 43 - 45 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114669787A (en) * | 2022-04-15 | 2022-06-28 | 中国葛洲坝集团机械船舶有限公司 | Large-scale cambered surface machining method |
| CN114669787B (en) * | 2022-04-15 | 2024-03-12 | 中国葛洲坝集团机械船舶有限公司 | Machining method for large cambered surface |
| CN116038260A (en) * | 2023-02-16 | 2023-05-02 | 浙江彰贵轴承科技有限公司 | Machining process for high-speed radial tilting pad supporting bearing guide pad |
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| CN114227176B (en) | 2023-09-29 |
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