CN114102543A - Method for marking processing reference of fracturing pump connecting rod - Google Patents
Method for marking processing reference of fracturing pump connecting rod Download PDFInfo
- Publication number
- CN114102543A CN114102543A CN202111432212.3A CN202111432212A CN114102543A CN 114102543 A CN114102543 A CN 114102543A CN 202111432212 A CN202111432212 A CN 202111432212A CN 114102543 A CN114102543 A CN 114102543A
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- connecting rod
- flatness
- rod body
- plane
- top surface
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012545 processing Methods 0.000 title claims abstract description 12
- 238000003754 machining Methods 0.000 claims abstract description 19
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 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 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 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
- 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
Images
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
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- 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 scribing a machining reference of a connecting rod of a fracturing pump, which comprises the following steps of: s1, placing the connecting rod body on a plane, measuring the first flatness of the plane where the rod body is located, and ensuring that the first flatness is 1mm or below by machining the surface of the rod body; s2, aligning the plane of the rod body, measuring the second flatness of the coating-removed area of the top surface of the big end of the connecting rod, and ensuring that the second flatness is 2mm or less through machining the coating-removed area of the top surface of the big end; and S3, taking the position of a transition fillet connected with the small end of the connecting rod and close to the 10mm position of the rod body as an initial position, drawing a center line in the vertical direction according to the design requirement 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 except the coating as subsequent alignment reference, and taking the center line as subsequent processing reference. The method can ensure that the fracturing pump connecting rod is 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 of a fracturing pump connecting rod.
Background
The fracturing pump is an important device for fracturing and acidizing operations and improving oil and gas yield in an oil field, is in a complex mechanical environment such as heavy load and variable load, the reasonability of the motion and the load directly influences the working performance of the fracturing pump, and the connecting rod is a motion part 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 pulsation of fluid in the pump during working, so that the strength of the connecting rod must meet the requirement during processing.
In the actual machining process, the contour tolerance of the non-machined surface of the connecting rod is extremely high, and therefore the design requirement is met, and in the initial development stage, a large number of products are scrapped, so that great cost is paid. The method mainly solves the problems that the junction of the large end of the connecting rod and the connecting rod body is seriously bent, the connecting rod is integrally twisted, and in order to solve the contradiction between large deformation of a casting and extremely high tolerance requirement on the contour of a non-machined surface, the method for scribing the machining reference of the connecting rod of the fracturing pump is invented.
Disclosure of Invention
The invention aims to provide a method for processing reference marking of a connecting rod of a fracturing pump, which can ensure that the connecting rod of the fracturing pump is manufactured smoothly, reduce the rejection rate and save the manufacturing cost.
The invention relates to a method for marking a fracturing pump connecting rod processing reference, which comprises the following steps:
s1, placing the connecting rod body on a plane, measuring the first flatness of the plane where the rod body is located, if the first flatness is 1mm or less, carrying out the next step, and if the first flatness is more than 1mm, 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 flatness of the coating-removed area of the top surface of the big end of the connecting rod, if the second flatness is 2mm or less, carrying out the next step, if the second flatness is more than 2mm, and ensuring that the second flatness is 2mm or less by mechanically enlarging the coating-removed area of the top surface of the big end;
and S3, taking the position of a transition fillet connected with the small end of the connecting rod and close to the 10mm position of the rod body as an initial position, drawing a center line in the vertical direction according to the design requirement 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 except the coating as subsequent alignment reference, and taking the center line as subsequent processing reference.
Further, the connecting rod body is a steel casting.
Further, the second flatness comprises flatness of a region of the top surface of the big end of the connecting rod except the coating in the length direction and the width direction, and the flatness in the length direction and the width direction is 2mm or less, and then the next step is carried out.
The invention firstly determines that the first flatness of the plane where the shaft is positioned meets the requirement, namely the first flatness is 1mm or less, then the plane of the rod body is aligned, the second flatness of the area of the top surface of the big end of the connecting rod except the coating is determined to meet the requirement, namely the second flatness is 2mm or less, the position of a transition fillet connected with the small end of the connecting rod and the rod body part which is 10mm close to the rod body part is taken as the initial position, the center line is drawn in the vertical direction according to the design requirement of the connecting rod body, taking the plane of the rod body and the area of the top surface of the big end of the connecting rod except the coating as a subsequent alignment reference, taking the central line as a subsequent processing reference, the machining allowance of the surface of the steel casting connecting rod body is removed in a machining mode, smooth manufacturing of the connecting rod body is guaranteed, the problem that the connecting rod body is distorted 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 region of the top surface of the large end of the connecting rod, except the coating, is adjusted in a machining mode, operation is convenient and fast, and implementation is easy.
Drawings
FIG. 1 is a front view of the connecting rod body of the present invention;
FIG. 2 is a top view of the connecting rod body of the present invention.
In the figure, 1 is a connecting rod body, 2 is a rod body, 3 is a connecting rod big end, 4 is a connecting rod small end and 5 is a transition round angle;
l-length direction, W-width direction, H-vertical direction, M-start position, N-center line.
Detailed Description
The present application will be described in detail below with reference to the accompanying drawings.
The method for marking the machining reference of the connecting rod of the fracturing pump comprises the following steps:
and S1, placing the connecting rod body 1 on a plane, wherein the connecting rod body 1 is an integrally formed steel casting, referring to 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, the connecting rod large end and the connecting rod small end are connected with two ends of the rod body, and a transition section of the connecting rod small end 4 connected with the rod body 2 is provided with a raised transition round angle 5. And measuring the first flatness of the plane of the rod body 2, if the first flatness is 1mm or less, carrying out the next step, and if the first flatness is more than 1mm, 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 2, measuring a second flatness of the area of the top surface of the big end 3 of the connecting rod, which is the area of the top surface of the big end 3 of the connecting rod in the figure 2, except the coating, if the second flatness is 2mm or less, proceeding to the next step, if the second flatness is more than 2mm, ensuring that the second flatness is 2mm or less through the area of the top surface of the enlarged end, which is the area of the top surface of the big end, which is removed the coating. And the second flatness comprises the flatness of the coating-removed area of the top surface of the big end of the connecting rod in the length direction L and the width direction W, and the flatness of the length direction L and the width direction W is 2mm or less, and the next step is carried out, otherwise, the second flatness is ensured to meet the requirement of a set value through the coating-removed area of the top surface of the machined big end.
And S3, aligning the plane of the rod body, marking a central line N in the vertical direction H according to the design requirement of the connecting rod body by taking the position of a transition fillet connected with the small end of the connecting rod body, which is 10mm close to the rod body part, as an initial position, namely marking the central line N on the 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 except 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 where the shaft is positioned meets the requirement, namely the first flatness is 1mm or less, then the plane of the rod body is aligned, the second flatness of the area of the top surface of the big end of the connecting rod except the coating is determined to meet the requirement, namely the second flatness is 2mm or less, the position of a transition fillet connected with the small end of the connecting rod and the rod body part which is 10mm close to the rod body part is taken as the initial position, the center line is drawn in the vertical direction according to the design requirement of the connecting rod body, taking the plane of the rod body and the area of the top surface of the big end of the connecting rod except the coating as a subsequent alignment reference, taking the central line as a subsequent processing reference, the machining allowance of the surface of the steel casting connecting rod body is removed in a machining mode, smooth manufacturing of the connecting rod body is guaranteed, the problem that the connecting rod body is distorted 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 region of the top surface of the large end of the connecting rod, except the coating, is adjusted in a machining mode, operation is convenient and fast, and implementation is easy.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A method for marking a machining reference of a connecting rod of a fracturing pump is characterized by comprising the following steps:
s1, placing the connecting rod body on a plane, measuring the first flatness of the plane where the rod body is located, if the first flatness is 1mm or less, carrying out the next step, and if the first flatness is more than 1mm, 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 flatness of the coating-removed area of the top surface of the big end of the connecting rod, if the second flatness is 2mm or less, carrying out the next step, if the second flatness is more than 2mm, and ensuring that the second flatness is 2mm or less by mechanically enlarging the coating-removed area of the top surface of the big end;
and S3, taking the position of a transition fillet connected with the small end of the connecting rod and close to the 10mm position of the rod body as an initial position, drawing a center line in the vertical direction according to the design requirement 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 except the coating as subsequent alignment reference, and taking the center line as subsequent processing reference.
2. The fracturing pump connecting rod machining reference scribing method according to claim 1, wherein: the connecting rod body is a steel casting.
3. The fracturing pump connecting rod processing reference scribing method according to claim 1 or 2, wherein: and the second flatness comprises the flatness of the area of the top surface of the big end of the connecting rod except the coating in the length direction and the width direction, and the flatness in the length direction and the width direction is 2mm or less, and the next step is carried out.
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 true CN114102543A (en) | 2022-03-01 |
| CN114102543B CN114102543B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111432212.3A Active CN114102543B (en) | 2021-11-29 | 2021-11-29 | Method for scribing machining reference of connecting rod of fracturing pump |
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| Country | Link |
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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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| CN114102543B (en) | 2024-04-12 |
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