CN102029511A - Method for manufacturing novel wear-resistance brake hubs for oil drilling and workover rigs - Google Patents
Method for manufacturing novel wear-resistance brake hubs for oil drilling and workover rigs Download PDFInfo
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- CN102029511A CN102029511A CN 201010582579 CN201010582579A CN102029511A CN 102029511 A CN102029511 A CN 102029511A CN 201010582579 CN201010582579 CN 201010582579 CN 201010582579 A CN201010582579 A CN 201010582579A CN 102029511 A CN102029511 A CN 102029511A
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Abstract
The invention relates to a method for manufacturing novel wear-resistance brake hubs for oil drilling and workover rigs, which comprises the following steps: (1) manufacturing blanks of hub bodies of brake hubs by a ring-rolling and forging method, namely, selecting low-carbon Cr-Mo low-alloy steel round bars or steel ingots according to the size of the hub bodies of the brake hubs, feeding blank-forming materials, heating the blank materials to 800 to 1,220 DEG C in a conventional heating furnace, forging the blank materials into hollow blanks by free forging or die forging, heating the hollow blanks to 800 to 1,220 DEG C in the conventional heating furnace, and rolling the hollow blanks to the blanks of the hub bodies of the brake hubs on a ring rolling machine; (2) turning, namely, turning the blanks of the hub bodies of the brake hubs to a required size; (3) assembling and welding connecting plates and baffle plates on the hub bodies of the brake hubs, and after welding, annealing to eliminate welding stress; and (4) welding water cavity sealing plates and connectors on the hub body components of the brake hubs, and after welding, carrying out a hydrostatic test. The brake hubs manufactured by the method have the advantages of high wear resistance, high thermal fatigue performance and high weldability with other parts such as the connecting plates and the baffle plates.
Description
Technical field
The present invention relates to a kind of oil-well rig, workover rig winch master rotor rotation brake brake hubs manufacture method.
Background technology
At present, oil-well rig, carbon alloy cast steel during the brake hubs hub body that the braking of workover rig winch master rotor is used mostly is, structure is an inner chamber water-cooled pattern, main material has ZG35SiMn, ZG35CrMo, ZG25Mn2V etc., adopt normalizing to add the service life that modifier treatment improves the brake hubs surface, in use there are the following problems for the brake hubs that these materials and manufacture method are made: first, when brake hubs and brake shoes cooperate brake, the brake hubs surface temperature can be up to 900 ℃, moment, the scintillation temperature reached 1280 ℃, after unclamping the steel brake strap, the surface temperature of brake hubs is very fast reduction in 3～5 seconds.Brake hubs is because of periodic heating and cooling in the work, and thermal stress, transformation stress and the frictional force of bearing alternation cause be full of cracks of brake hubs hub body and wear out failure.The second, brake hubs is the connecting plate of steel-casting hub body and low-alloy steel, the Welding Structure of water cavity shrouding, because of in carbon alloy cast steel carbon equivalent higher, as the average carbon equivalent of ZG25Mn2V be: C
Equivalent=0.25+1.8/6+0.11/5=0.57, welding performance is poor, needs preheating and postweld heat preservation, easily stays weld defect.Brake hubs service load, the shock loading used on the oil drilling and workover machines are bigger, and periodic alternating thermal stress, transformation stress comprehensive function cause the cast steel class brake hubs life-span short, and reliability is low, has potential safety hazard.
Summary of the invention
The purpose of this invention is to provide a kind of oil drilling and workover machines novel wear resistant brake hubs manufacture method, the heat-resistant anti-fatigue performance of solution brake hubs is poor, the problem of solderability difference.
Technical solution of the present invention adopts following steps:
(1) adopt rolling ring rolling making method to make brake hubs hub chaeta base:
1. according to the size of brake hubs hub body, select for use under low-carbon (LC) Cr-Mo series low-alloy steel round steel or the steel ingot to become blank;
2. normal reheating furnace is with above-mentioned blank heating to 800 ℃～1220 ℃;
3. open die forging or die forging are swaged into hollow blank with blank;
4. normal reheating furnace heating hollow blank to 800 ℃～1220 ℃;
5. on the Ring Rolling Machine bed, hollow blank is rolled into brake hubs hub chaeta base;
(2) machined into is worked into the technological requirement size with brake hubs hub chaeta base;
(3) assembly welding connecting plate, baffle plate on brake hubs hub body, post-weld annealed are handled and are eliminated welding stress;
(4) welding water cavity shrouding, joint on brake hubs hub body assembly, the postwelding water pressure test.
Beneficial effect of the present invention is:
1, wearability is good: structural alloy steel is made back dense structure through grinding ring rolling, and wearability is good;
2, thermal fatigue property is good: thermal fatigue property belongs to low-cycle fatigue, with the plastic deformation ability of material very big relation is arranged, and plastic deformation ability is strong, and thermal fatigue resistance is good.Obviously, 20CrMo steel ingot material is better than the plasticity of casting medium carbon alloy steel, and its reason one is that carbon content is low, and the 2nd, grind and forge dense structure, the 3rd, crystal grain is tiny, and the 4th, internal flaw is few;
3, the weldability with other part such as connecting plate, baffle plate is good: connecting plate, barrier material are low-alloy steel, and they weld without preheating with the hub body, and also without postweld heat preservation, traditional casting brake hubs then needs preheating and postweld heat preservation, easily stays weld defect.
Description of drawings
Fig. 1 is the brake hubs structure diagram, among the figure: 1-brake hubs hub body; The 2-connecting plate; 3-water cavity shrouding; The 4-baffle plate; The 5-joint.
The specific embodiment
Figure 1 shows that oil drilling and workover machines brake hubs structure diagram, the hub body 1 of brake hubs is cylindric, and the recirculated water water cavity that is used to cool off brake hubs hub body that is made of with hub body 1 inner headed face connecting plate 2, water cavity shrouding 3, baffle plate 4, joint 5 is arranged at brake hubs hub body 1 inner headed face assembly welding.
Be example with the JC21D brake hubs below, its maximum outside diameter 1085mm, minimum diameter 1011mm, the wide 316mm of hub body is further described the present invention.
(1) adopt rolling ring rolling making method to make brake hubs hub chaeta base:
1. according to the size of brake hubs hub body, select the 20CrMo alloyed steel ingot for use, blanking heavily is the blank of 530kg;
2. common heating furnace is with above-mentioned blank heating to 800 ℃～1220 ℃;
3. open die forging is swaged into blank the hollow blank of external diameter 556mm, endoporus 250mm, wide 250mm:
4. common heating furnace heating hollow blank to 800 ℃～1220 ℃;
5. on the Ring Rolling Machine bed, hollow blank is rolled into brake hubs hub chaeta base, forging appearance and size: external diameter 1100mm, endoporus 985mm, width 335mm;
(2) machined into is worked into the technological requirement size with brake hubs hub chaeta base, and brake hubs hub body survives;
(3) assembly welding connecting plate, baffle plate on brake hubs hub body, post-weld annealed is handled, and is used to eliminate welding stress;
(4) welding water cavity shrouding, joint on brake hubs hub body assembly, postwelding carries out the water pressure test.
Welding procedure is in above-mentioned (3), (4) step:
Adopt CO
2The gas shielded arc welding welding;
Select the ER50-G gas shield welding wire for use, welding wire chemical component weight percentage is: C≤0.10%, Mn≤1.26%, Si≤0.57%, S≤0.011%, P≤0.014%, Cu≤0.18%, Ti≤0.12;
Welding condition: gage of wire (mm): φ 1.2; Electric current (A): 200～220; Arc voltage (V): 24～26; Speed of welding (mm/min): 180～200;
Polarity: dc reverse connection.
Claims (1)
1. oil drilling and workover machines novel wear resistant brake hubs manufacture method is characterized in that: adopt following steps:
(1) adopt rolling ring rolling making method to make brake hubs hub chaeta base:
1. according to the size of brake hubs hub body, select for use under low-carbon (LC) Cr-Mo series low-alloy steel round steel or the steel ingot to become blank;
2. normal reheating furnace is with above-mentioned blank heating to 800 ℃～1220 ℃;
3. open die forging or die forging are swaged into hollow blank with blank;
4. normal reheating furnace heating hollow blank to 800 ℃～1220 ℃;
5. on the Ring Rolling Machine bed, hollow blank is rolled into brake hubs hub chaeta base;
(2) machined into is worked into the technological requirement size with brake hubs hub chaeta base;
(3) assembly welding connecting plate, baffle plate on brake hubs hub body, post-weld annealed are handled and are eliminated welding stress;
(4) welding water cavity shrouding, joint on brake hubs hub body assembly, the postwelding water pressure test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105825799A CN102029511B (en) | 2010-12-10 | 2010-12-10 | Method for manufacturing novel wear-resistance brake hubs for oil drilling and workover rigs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105825799A CN102029511B (en) | 2010-12-10 | 2010-12-10 | Method for manufacturing novel wear-resistance brake hubs for oil drilling and workover rigs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102029511A true CN102029511A (en) | 2011-04-27 |
| CN102029511B CN102029511B (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105825799A Expired - Fee Related CN102029511B (en) | 2010-12-10 | 2010-12-10 | Method for manufacturing novel wear-resistance brake hubs for oil drilling and workover rigs |
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| CN (1) | CN102029511B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240375A (en) * | 2013-05-08 | 2013-08-14 | 长沙市望城区誉诚机械有限公司 | Forging processing method of brake wheel |
| CN104942535A (en) * | 2015-04-30 | 2015-09-30 | 南阳二机石油装备(集团)有限公司 | Manufacture technique of tap shells for polar drill rigs |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20212744U1 (en) * | 2002-08-20 | 2004-01-08 | Lothar Laflör GmbH & Co KG | Hub for light spoked wheels has hub body made of plastic and discs at end of body made of metal and connected to hub body and torsionally fixed, while brake drum is component separate from adjacent disc and torsionally fixed to it |
| CN101078087A (en) * | 2007-02-01 | 2007-11-28 | 南阳二机石油装备(集团)有限公司 | Petroleum drilling machine winch brake hub novel material and preparation method thereof |
| CN101082357A (en) * | 2007-05-08 | 2007-12-05 | 南阳二机石油装备(集团)有限公司 | Wear resistant brake disc and manufacturing method therefor |
| CN201228740Y (en) * | 2008-05-15 | 2009-04-29 | 任丘市博科机电新技术有限公司 | Brake disc of hydraulic disc type brake device |
| CN201326667Y (en) * | 2008-12-05 | 2009-10-14 | 孙阳阳 | Brake disc for driller |
-
2010
- 2010-12-10 CN CN2010105825799A patent/CN102029511B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20212744U1 (en) * | 2002-08-20 | 2004-01-08 | Lothar Laflör GmbH & Co KG | Hub for light spoked wheels has hub body made of plastic and discs at end of body made of metal and connected to hub body and torsionally fixed, while brake drum is component separate from adjacent disc and torsionally fixed to it |
| CN101078087A (en) * | 2007-02-01 | 2007-11-28 | 南阳二机石油装备(集团)有限公司 | Petroleum drilling machine winch brake hub novel material and preparation method thereof |
| CN101082357A (en) * | 2007-05-08 | 2007-12-05 | 南阳二机石油装备(集团)有限公司 | Wear resistant brake disc and manufacturing method therefor |
| CN201228740Y (en) * | 2008-05-15 | 2009-04-29 | 任丘市博科机电新技术有限公司 | Brake disc of hydraulic disc type brake device |
| CN201326667Y (en) * | 2008-12-05 | 2009-10-14 | 孙阳阳 | Brake disc for driller |
Non-Patent Citations (1)
| Title |
|---|
| 《金属热处理》 20051231 张子中等 刹车毂裂纹产生原因分析及工艺改进 83-85 第30卷, 第11期 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240375A (en) * | 2013-05-08 | 2013-08-14 | 长沙市望城区誉诚机械有限公司 | Forging processing method of brake wheel |
| CN104942535A (en) * | 2015-04-30 | 2015-09-30 | 南阳二机石油装备(集团)有限公司 | Manufacture technique of tap shells for polar drill rigs |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102029511B (en) | 2012-06-27 |
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Address after: 473065 No. 869 West Zhongzhou Road, Henan, Nanyang Patentee after: RG PETRO-MACHINERY GROUP Co.,Ltd. Address before: 473065 No. 869 West Zhongzhou Road, Henan, Nanyang Patentee before: RG PETRO-MACHINERY (Group) Co.,Ltd. |
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Granted publication date: 20120627 Termination date: 20211210 |