CN114102543B - Method for scribing machining reference of connecting rod of fracturing pump - Google Patents
Method for scribing machining reference of connecting rod of fracturing pump Download PDFInfo
- Publication number
- CN114102543B CN114102543B CN202111432212.3A CN202111432212A CN114102543B CN 114102543 B CN114102543 B CN 114102543B CN 202111432212 A CN202111432212 A CN 202111432212A CN 114102543 B CN114102543 B CN 114102543B
- Authority
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- China
- Prior art keywords
- connecting rod
- rod body
- plane
- flatness
- top surface
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Links
- 238000003754 machining Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 13
- 230000007704 transition Effects 0.000 claims abstract description 9
- 238000013461 design Methods 0.000 claims abstract description 7
- 238000005266 casting Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H7/00—Marking-out or setting-out work
- B25H7/04—Devices, e.g. scribers, for marking
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a method for marking out a machining reference of a connecting rod of a fracturing pump, which comprises the following steps: s1, placing a connecting rod body on a plane, measuring a first flatness of the plane where a rod body is located, and machining the surface of the rod body to ensure that the first flatness is 1mm or less; s2, aligning the plane of the rod body, measuring a second plane degree of a coating removing area on the top surface of the large end of the connecting rod, and enlarging the coating removing area on the top surface of the end by a machine to ensure that the second plane degree is 2mm or less; s3, a position, which is 10mm close to the rod body, of a transition fillet connected with the small end of the connecting rod and is used as a starting position, a center line is drawn in the vertical direction according to the design requirement of the connecting rod body, a plane where the rod body is located and a coating removing area on the top surface of the large end of the connecting rod are used as subsequent alignment references, and the center line is used as a subsequent processing reference. The connecting rod of the fracturing pump can be ensured to be manufactured smoothly, the rejection rate is reduced, and the manufacturing cost is saved.
Description
Technical Field
The invention relates to the technical field of machining of connecting rods, in particular to a method for marking a machining reference line of a connecting rod of a fracturing pump.
Background
The fracturing pump is an important device for carrying out fracturing and acidizing operations and improving oil and gas yield in oil fields, is in complex mechanical environments such as heavy load and variable load, the motion and rationality of the loaded load directly influence the working performance of the fracturing pump, and the connecting rod is a motion piece for transmitting power at the force end of the fracturing pump and is subjected to alternating loads such as stretching, compression and bending and the like and the pulsation effect of fluid in the pump during working, so that the strength of the connecting rod during processing must meet the requirements.
In the actual machining process, the contour tolerance requirement of the non-machined surface of the connecting rod is extremely high, so that the design requirement is single, and in the early development stage, a large amount of products are scrapped, and great cost is paid. The method is characterized in that the joint of the large end of the connecting rod and the connecting rod body is seriously bent, the whole connecting rod is distorted, and in order to solve the contradiction that the casting is greatly deformed and the contour tolerance requirement of the non-processed surface is extremely high, the method for marking out the connecting rod processing reference of the fracturing pump is invented.
Disclosure of Invention
The invention aims to provide a method for marking out a machining reference of a connecting rod of a fracturing pump, which can ensure smooth manufacture of the connecting rod of the fracturing pump, reduce the rejection rate and save the manufacturing cost.
The invention relates to a method for marking off a machining reference line of a connecting rod of a fracturing pump, which comprises the following steps:
s1, placing a connecting rod body on a plane, measuring a first flatness of the plane where the rod body is located, if the first flatness is 1mm or less, performing the next step, and if the first flatness is more than 1mm, ensuring that the first flatness is 1mm or less by machining the surface of the rod body;
s2, aligning the plane of the shaft, measuring a second plane degree of a coating removing area on the top surface of the large end of the connecting rod, if the second plane degree is 2mm or less, carrying out the next step, and if the second plane degree is more than 2mm, enlarging the coating removing area on the top surface of the end by a machine to ensure that the second plane degree is 2mm or less;
s3, a position, which is 10mm close to the rod body, of a transition fillet connected with the small end of the connecting rod and is used as a starting position, a center line is drawn in the vertical direction according to the design requirement of the connecting rod body, a plane where the rod body is located and a coating removing area on the top surface of the large end of the connecting rod are used as subsequent alignment references, and the center line is used as a subsequent processing reference.
Further, the connecting rod body is a steel casting.
Further, the second flatness includes flatness of a region of the connecting rod large end top surface with the coating removed in the length direction and the width direction, and when the flatness in the length direction and the width direction is 2mm or less, the next step is performed.
The invention firstly determines that the first flatness of the plane of the rod body meets the requirement, namely that the first flatness is 1mm and below, then the plane of the rod body is corrected, and then determines that the second flatness of the area of the coating removed from the top surface of the large end of the connecting rod meets the requirement, namely that the second flatness is 2mm and below, then the position of the transition fillet of the connection of the rod body and the small end of the connecting rod, which is close to the 10mm position of the rod body, is used as the initial position, the center line is marked in the vertical direction according to the design requirement of the connecting rod body, the plane of the rod body and the area of the coating removed from the top surface of the large end of the connecting rod are used as the subsequent alignment reference, and the center line is used as the subsequent processing reference, and the processing allowance of the surface of the connecting rod body of the cast steel piece is removed in a mechanical processing mode, so that the smooth manufacture of the connecting rod body is ensured, the torsion problem of the connecting rod body is avoided, the manufacturing rejection rate is reduced, and the manufacturing cost is saved. If the first flatness or the second flatness is out of tolerance, the flatness of the plane where the rod body is located and the area where the coating is removed from the top surface of the large end of the connecting rod is adjusted in a machining mode, and the method is convenient and quick to operate and easy to realize.
Drawings
FIG. 1 is a front view of a connecting rod body according to the present invention;
fig. 2 is a top view of the connecting rod body of the present invention.
In the figure, a connecting rod body, a connecting rod large end, a connecting rod small end and a transition fillet are respectively arranged at the positions of 1, 2, 3, 4;
l-length direction, W-width direction, H-vertical direction, M-starting position, N-center line.
Detailed Description
The present application is described in detail below with reference to the accompanying drawings.
The method for scribing the machining reference of the connecting rod of the fracturing pump comprises the following steps:
s1, placing the connecting rod body 1 on a plane, wherein the connecting rod body 1 is an integrally formed steel casting, see fig. 1 and 2, the connecting rod body 1 comprises a rod body 2, a connecting rod large end 3 and a connecting rod small end 4, wherein the connecting rod large end 3 and the connecting rod small end 4 are connected with the two ends of the rod body, and a transition section of the connecting rod small end 4, which is connected with the rod body 2, is provided with a convex transition fillet 5. And measuring the first flatness of the plane of the shaft 2, if the first flatness is 1mm or less, performing the next step, and if the first flatness is more than 1mm, ensuring that the first flatness is 1mm or less by machining the surface of the shaft.
S2, aligning the plane of the rod body 2, and measuring the second flatness of the coating removing area on the top surface of the large end 3 of the connecting rod, wherein the coating removing area on the top surface of the large end 3 of the connecting rod is the large end 3 of the connecting rod in the figure 2, if the second flatness is 2mm or less, the next step is carried out, and if the second flatness is more than 2mm, the coating removing area on the top surface of the large end is enlarged by a machine, so that the second flatness is 2mm or less. The second flatness comprises the flatness of the area of the connecting rod large end top surface with the coating removed in the length direction L and the width direction W, when the flatness of the length direction L and the width direction W is 2mm or less, the next step is carried out, otherwise, the area of the connecting rod large end top surface with the coating removed by the machine is used for ensuring that the second flatness meets the set value requirement.
And S3, aligning the plane of the rod body, taking the position, which is 10mm close to the rod body, of a transition fillet connected with the small end of the connecting rod body as a starting position, scribing a central line N in the vertical direction H according to the design requirement of the connecting rod body, namely scribing the central line N on the outer peripheral wall of the connecting rod body, taking the plane of the rod body and the area of the top surface of the large end of the connecting rod, which is separated from the coating, as a subsequent alignment reference, and taking the central line N as a subsequent processing reference.
The invention firstly determines that the first flatness of the plane of the rod body meets the requirement, namely that the first flatness is 1mm and below, then the plane of the rod body is corrected, and then determines that the second flatness of the area of the coating removed from the top surface of the large end of the connecting rod meets the requirement, namely that the second flatness is 2mm and below, then the position of the transition fillet of the connection of the rod body and the small end of the connecting rod, which is close to the 10mm position of the rod body, is used as the initial position, the center line is marked in the vertical direction according to the design requirement of the connecting rod body, the plane of the rod body and the area of the coating removed from the top surface of the large end of the connecting rod are used as the subsequent alignment reference, and the center line is used as the subsequent processing reference, and the processing allowance of the surface of the connecting rod body of the cast steel piece is removed in a mechanical processing mode, so that the smooth manufacture of the connecting rod body is ensured, the torsion problem of the connecting rod body is avoided, the manufacturing rejection rate is reduced, and the manufacturing cost is saved.
If the first flatness or the second flatness is out of tolerance, the flatness of the plane where the rod body is located and the area where the coating is removed from the top surface of the large end of the connecting rod is adjusted in a machining mode, and the method is convenient and quick to operate and easy to realize.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (2)
1. The method for machining the datum scribing of the connecting rod of the fracturing pump is characterized by comprising the following steps of:
s1, placing a connecting rod body on a plane, measuring a first flatness of the plane where the rod body is located, if the first flatness is 1mm or less, performing the next step, and if the first flatness is more than 1mm, ensuring that the first flatness is 1mm or less by machining the surface of the rod body;
s2, aligning the plane of the shaft, measuring a second plane degree of a coating removing area on the top surface of the large end of the connecting rod, if the second plane degree is 2mm or less, carrying out the next step, and if the second plane degree is more than 2mm, enlarging the coating removing area on the top surface of the end by a machine to ensure that the second plane degree is 2mm or less;
s3, a position, which is 10mm close to the rod body, of a transition fillet connected with the small end of the connecting rod and is used as a starting position, a center line is drawn in the vertical direction according to the design requirement of the connecting rod body, a plane where the rod body is located and a coating removing area on the top surface of the large end of the connecting rod are used as subsequent alignment references, and the center line is used as a subsequent processing reference.
2. The fracturing pump connecting rod processing reference scribing method of claim 1, wherein the method comprises the following steps: the connecting rod body is a steel casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111432212.3A CN114102543B (en) | 2021-11-29 | 2021-11-29 | Method for scribing machining reference of connecting rod of fracturing pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111432212.3A CN114102543B (en) | 2021-11-29 | 2021-11-29 | Method for scribing machining reference of connecting rod of fracturing pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114102543A CN114102543A (en) | 2022-03-01 |
| CN114102543B true CN114102543B (en) | 2024-04-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111432212.3A Active CN114102543B (en) | 2021-11-29 | 2021-11-29 | Method for scribing machining reference of connecting rod of fracturing pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114102543B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1155041A (en) * | 1995-11-08 | 1997-07-23 | 丰田自动车株式会社 | Method for processing linklever |
| CN201208747Y (en) * | 2008-06-24 | 2009-03-18 | 中国北车集团大同电力机车有限责任公司 | Marking device for car body traction base |
| CN101498335A (en) * | 2009-01-21 | 2009-08-05 | 重庆江增机械有限公司 | Method for manufacturing diesel engine connecting bar |
| JP2014098423A (en) * | 2012-11-14 | 2014-05-29 | Fuji Heavy Ind Ltd | Method for manufacturing connecting rod and semifinished product of connecting rod |
| CN107350739A (en) * | 2017-05-31 | 2017-11-17 | 安庆中船动力配套有限公司 | A kind of processing method of engine connecting rod |
| CN206811934U (en) * | 2017-05-24 | 2017-12-29 | 吉林省利源智能机械制造有限公司 | A kind of connecting rod opening scribing tooling |
| CN111822762A (en) * | 2020-06-28 | 2020-10-27 | 上海中船三井造船柴油机有限公司 | Method for processing connecting rod of large marine diesel engine |
| KR102327684B1 (en) * | 2021-06-15 | 2021-11-17 | 동림산업 주식회사 | Engine connecting rod and method for manufacturing the same |
-
2021
- 2021-11-29 CN CN202111432212.3A patent/CN114102543B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1155041A (en) * | 1995-11-08 | 1997-07-23 | 丰田自动车株式会社 | Method for processing linklever |
| CN201208747Y (en) * | 2008-06-24 | 2009-03-18 | 中国北车集团大同电力机车有限责任公司 | Marking device for car body traction base |
| CN101498335A (en) * | 2009-01-21 | 2009-08-05 | 重庆江增机械有限公司 | Method for manufacturing diesel engine connecting bar |
| JP2014098423A (en) * | 2012-11-14 | 2014-05-29 | Fuji Heavy Ind Ltd | Method for manufacturing connecting rod and semifinished product of connecting rod |
| CN206811934U (en) * | 2017-05-24 | 2017-12-29 | 吉林省利源智能机械制造有限公司 | A kind of connecting rod opening scribing tooling |
| CN107350739A (en) * | 2017-05-31 | 2017-11-17 | 安庆中船动力配套有限公司 | A kind of processing method of engine connecting rod |
| CN111822762A (en) * | 2020-06-28 | 2020-10-27 | 上海中船三井造船柴油机有限公司 | Method for processing connecting rod of large marine diesel engine |
| KR102327684B1 (en) * | 2021-06-15 | 2021-11-17 | 동림산업 주식회사 | Engine connecting rod and method for manufacturing the same |
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| Publication number | Publication date |
|---|---|
| CN114102543A (en) | 2022-03-01 |
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