CN113146154A - Processing technology of connecting rod of high-pressure plunger pump - Google Patents
Processing technology of connecting rod of high-pressure plunger pump Download PDFInfo
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- CN113146154A CN113146154A CN202110389767.8A CN202110389767A CN113146154A CN 113146154 A CN113146154 A CN 113146154A CN 202110389767 A CN202110389767 A CN 202110389767A CN 113146154 A CN113146154 A CN 113146154A
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Abstract
The invention discloses a processing technology of a high-pressure plunger pump connecting rod, which specifically comprises the following processing steps: s1: obtaining a connecting rod blank: the method comprises the steps of formulating a blank according to requirements, wherein the size and the material of the blank meet the processing requirements, inspecting the blank, and avoiding obvious defects of the blank to obtain a primary inspection blank; s2: measuring and roughly machining a blank; s3: detecting the dynamic balance of the roughly processed object; s4: performing reinforcement processing on the detected object; s5: performing finish machining on the reinforced object; s6: quenching the finished object; s7: and (3) packaging and processing of finished products: and (4) obtaining the qualified product quenched in the step S6. Compared with the existing high-pressure plunger pump connecting rod processing technology, the processing method is simple, the processed connecting rod is high in external strength and good in flexibility inside the hole, the service life is prolonged, the processing precision of the connecting rod is guaranteed, the connecting rod is accurately installed in the using process, and abrasion is reduced.
Description
Technical Field
The invention relates to a processing technology of a connecting rod of a high-pressure plunger pump, belonging to the technical field of material processing.
Background
The use pressure of the high-pressure plunger pump is generally between 10MPa and 100 MPa. The pump belongs to a positive displacement pump, and achieves the purpose of conveying liquid by means of the periodic change of the volume in a working cavity; the mechanical energy of the prime motor is directly converted into pressure energy for conveying liquid through the pump; the capacity of the pump depends only on the value of the change in the volume of the working chamber and its number of changes per unit of time, theoretically independently of the discharge pressure. Reciprocating pumps produce a periodic variation in working chamber volume by means of the reciprocating motion of a piston within a hydraulic cylinder working chamber (or by periodic elastic deformation of a flexible element such as a diaphragm, bellows, etc. within the working chamber). Structurally, the working chamber of the reciprocating pump is isolated from the outside by a sealing device and is communicated or closed with a pipeline through pump valves (a suction valve and a discharge valve).
The connecting rod of the high-pressure plunger pump plays a connecting role in the high-pressure plunger pump at present, and needs to bear larger acting force, the requirement on the physical property of the connecting rod of the high-pressure plunger pump is higher, and the problem of large error exists after the existing processing mode is used for processing. For this reason, a corresponding technical scheme needs to be designed for solution.
Disclosure of Invention
The invention provides a high-pressure plunger pump connecting rod processing technology aiming at the defects in the prior art, the high-pressure plunger pump connecting rod processing technology has higher processing precision and longer service life, and solves the problems that in the prior art, a high-pressure plunger pump connecting rod plays a connecting role in a high-pressure plunger pump, needs to bear larger acting force, has higher requirement on the physical performance of the high-pressure plunger pump connecting rod, has large error after being processed by the existing processing mode and the like.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a processing technology of a high-pressure plunger pump connecting rod specifically comprises the following processing steps:
s1: obtaining a connecting rod blank: the method comprises the steps of formulating a blank according to requirements, wherein the size and the material of the blank meet the processing requirements, inspecting the blank, and avoiding obvious defects of the blank to obtain a primary inspection blank;
s2: measuring and roughly machining a blank: acquiring a primary detection blank, measuring the size of the primary detection blank, wherein the size of each position of the primary detection blank is not less than 4-10mm of the connecting rod standard part, taking the blank as a qualified blank, clamping one end of the measured qualified blank, performing machining operation on other non-clamped positions of the qualified blank, clamping one end of the machining operation of the qualified blank, and performing machining operation on the other end of the machining operation of the qualified blank to obtain a rough machining connecting rod part;
s3: and (3) detecting the dynamic balance of the roughly processed object: acquiring the rough machining connecting rod piece in the step S2, coaxially clamping one end of the rough machining connecting rod piece on a turntable, driving the turntable to rotate, measuring the dynamic balance condition of the rough machining connecting rod piece, acquiring dynamic balance data and providing machining amount data for the finish machining of the rough machining connecting rod piece;
s4: and (3) strengthening the detected object: acquiring the rough machining connecting rod piece after the dynamic balance detection in the step S3, and carrying out shot blasting on the inner side wall of the rough machining connecting rod piece, wherein the diameter of a steel shot adopted in the shot blasting is 50-60 meshes, and the pressure of the shot blasting is 0.5-0.7 MPa, so as to obtain a reinforced connecting rod piece;
s5: and (3) finishing the reinforced object: taking out the reinforced connecting rod piece in the step S4, fixedly clamping one end of the reinforced connecting rod piece, carrying out finish machining on the non-clamping position of the reinforced connecting rod piece, clamping the other end of the reinforced connecting rod piece, carrying out finish machining on the exposed part to obtain a finish machining connecting rod piece, detecting the finish machining connecting rod piece through a detection tool, and judging the size of the finish machining connecting rod piece to be a qualified product within an error range, otherwise, judging the size of the finish machining connecting rod piece to be a non-qualified product;
s6: quenching the finished article: acquiring the qualified products obtained in the step S5 after finish machining, and quenching the qualified products to ensure that the quenched qualified products are suitable for the use environment of the high-pressure plunger pump;
s7: and (3) packaging and processing of finished products: and (4) obtaining the qualified product quenched in the step S6.
As an improvement of the above scheme: the connecting rod standard part consists of a connecting rod big end, a connecting rod small end and a connecting piece connected between the connecting rod big end and the connecting rod small end.
As an improvement of the above scheme: in the step S2, the machining operations for the other non-clamped positions of the acceptable blank include cutting, chamfering, and drilling, and when the acceptable blank is drilled, the acceptable blank needs to be machined in place at one time without a machining allowance, and the hole formed after drilling is shot-blasted by shot-blasting.
As an improvement of the above scheme: in the step S2, when the other end of the qualified blank is processed, the processed end of the qualified blank is covered with a protective layer, and then clamped, wherein the protective layer is made of rubber.
As an improvement of the above scheme: the connecting rod standard component is of a symmetrical structure, and the machining amount of the rough machining connecting rod component is obtained through dynamic balance detection.
As an improvement of the above scheme: the non-qualified product in the step S5 includes the following two cases:
the first method comprises the following steps: the size of the non-qualified product is smaller than the size of the corresponding position of the connecting rod standard component, and the size difference exceeds the error range, and at the moment, the non-qualified product is discarded;
and the second method comprises the following steps: and the size of the non-qualified product is larger than that of the corresponding position of the connecting rod standard part, and at the moment, the non-qualified product is subjected to finish machining again, and the position with the improper size is cut until the non-qualified product becomes a qualified product or is discarded.
Compared with the prior art, the invention has the following implementation effects:
compared with the existing high-pressure plunger pump connecting rod processing technology, the method is simple to operate, high in external strength of the processed connecting rod and good in flexibility of the inner portion of the hole, the service life is prolonged, the processing precision of the connecting rod is guaranteed, the connecting rod is accurate to install in the using process, and abrasion is reduced.
Drawings
Fig. 1 is a flow chart of a processing technology of a high-pressure plunger pump connecting rod of the invention.
Detailed Description
The present invention will be described with reference to specific examples.
Example 1:
as shown in fig. 1: a processing technology of a high-pressure plunger pump connecting rod specifically comprises the following processing steps:
s1: obtaining a connecting rod blank: the method comprises the steps of formulating a blank according to requirements, wherein the size and the material of the blank meet the processing requirements, inspecting the blank, and avoiding obvious defects of the blank to obtain a primary inspection blank;
s2: measuring and roughly machining a blank: the method comprises the following steps of obtaining a primary detection blank, measuring the size of the primary detection blank, wherein the size of each position of the primary detection blank is not less than 4mm of a connecting rod standard part, the connecting rod standard part is composed of a connecting rod big end, a connecting rod small end and a connecting piece connected between the connecting rod big end and the connecting rod small end, clamping one end of the measured qualified blank, carrying out machining operation on other non-clamped positions of the qualified blank, clamping one end of the machining operation of the qualified blank, and carrying out machining operation on the other end of the machining operation of the qualified blank to obtain a rough machining connecting rod part;
the connecting rod standard component is of a symmetrical structure, and the machining amount of the rough machining connecting rod component is obtained through dynamic balance detection;
the machining operation of other non-clamping positions of the qualified blank comprises cutting, chamfering and drilling, when the qualified blank is drilled, the qualified blank needs to be machined in place at one time without machining allowance, and the hole formed after drilling is subjected to shot blasting;
shot peening, also known as shot peening, is one of the effective methods for improving the fatigue life of parts, and is to spray high-speed shot flow onto the surface of a metal workpiece to plastically deform the surface layer of the metal workpiece to form a strengthening layer with a certain thickness, and to form a high residual compressive stress in the strengthening layer.
For low strength materials, shot peening can produce a good surface strengthening layer, but for high strength materials, shot peening can hardly form a distinct strengthening layer, but can introduce strong compressive residual stresses.
When the other end of the qualified blank is processed, the processed end of the qualified blank is clamped after being coated with a protective layer, and the protective layer is made of rubber;
s3: and (3) detecting the dynamic balance of the roughly processed object: acquiring the rough machining connecting rod piece in the step S2, coaxially clamping one end of the rough machining connecting rod piece on a turntable, driving the turntable to rotate, measuring the dynamic balance condition of the rough machining connecting rod piece, acquiring dynamic balance data and providing machining amount data for the finish machining of the rough machining connecting rod piece;
s4: and (3) strengthening the detected object: acquiring the rough machining connecting rod piece after the dynamic balance detection in the step S3, and carrying out shot blasting on the inner side wall of the rough machining connecting rod piece, wherein the diameter of a steel shot adopted in the shot blasting is 50-60 meshes, and the pressure of the shot blasting is 0.5MPa, so as to obtain a reinforced connecting rod piece;
s5: and (3) finishing the reinforced object: taking out the reinforced connecting rod piece in the step S4, fixedly clamping one end of the reinforced connecting rod piece, carrying out finish machining on the non-clamping position of the reinforced connecting rod piece, clamping the other end of the reinforced connecting rod piece, carrying out finish machining on the exposed part to obtain a finish machining connecting rod piece, detecting the finish machining connecting rod piece through a detection tool, and judging the size of the finish machining connecting rod piece to be a qualified product within an error range, otherwise, judging the size of the finish machining connecting rod piece to be a non-qualified product;
non-qualified products include the following two cases:
the first method comprises the following steps: the size of the non-qualified product is smaller than the size of the corresponding position of the connecting rod standard component, and the size difference exceeds the error range, and at the moment, the non-qualified product is discarded;
and the second method comprises the following steps: the size of the non-qualified product is larger than that of the corresponding position of the connecting rod standard part, at the moment, the non-qualified product is subjected to finish machining again, and the position with the improper size is cut until the non-qualified product becomes a qualified product or is discarded;
s6: quenching the finished article: acquiring the qualified products obtained in the step S5 after finish machining, and quenching the qualified products to ensure that the quenched qualified products are suitable for the use environment of the high-pressure plunger pump;
s7: and (3) packaging and processing of finished products: and (4) obtaining the qualified product quenched in the step S6.
Example 2:
as shown in fig. 1: a processing technology of a high-pressure plunger pump connecting rod specifically comprises the following processing steps:
s1: obtaining a connecting rod blank: the method comprises the steps of formulating a blank according to requirements, wherein the size and the material of the blank meet the processing requirements, inspecting the blank, and avoiding obvious defects of the blank to obtain a primary inspection blank;
s2: measuring and roughly machining a blank: the method comprises the following steps of obtaining a primary detection blank, measuring the size of the primary detection blank, wherein the size of each position of the primary detection blank is not smaller than 7mm of a connecting rod standard part, the connecting rod standard part is composed of a connecting rod big end, a connecting rod small end and a connecting piece connected between the connecting rod big end and the connecting rod small end, clamping one end of the measured qualified blank, carrying out machining operation on other non-clamped positions of the qualified blank, clamping one end of the machining operation of the qualified blank, and carrying out machining operation on the other end of the machining operation of the qualified blank to obtain a rough machining connecting rod part;
the connecting rod standard component is of a symmetrical structure, and the machining amount of the rough machining connecting rod component is obtained through dynamic balance detection;
the machining operation of other non-clamping positions of the qualified blank comprises cutting, chamfering and drilling, when the qualified blank is drilled, the qualified blank needs to be machined in place at one time without machining allowance, and the hole formed after drilling is subjected to shot blasting;
shot peening, also known as shot peening, is one of the effective methods for improving the fatigue life of parts, and is to spray high-speed shot flow onto the surface of a metal workpiece to plastically deform the surface layer of the metal workpiece to form a strengthening layer with a certain thickness, and to form a high residual compressive stress in the strengthening layer.
For low strength materials, shot peening can produce a good surface strengthening layer, but for high strength materials, shot peening can hardly form a distinct strengthening layer, but can introduce strong compressive residual stresses.
When the other end of the qualified blank is processed, the processed end of the qualified blank is clamped after being coated with a protective layer, and the protective layer is made of rubber;
s3: and (3) detecting the dynamic balance of the roughly processed object: acquiring the rough machining connecting rod piece in the step S2, coaxially clamping one end of the rough machining connecting rod piece on a turntable, driving the turntable to rotate, measuring the dynamic balance condition of the rough machining connecting rod piece, acquiring dynamic balance data and providing machining amount data for the finish machining of the rough machining connecting rod piece;
s4: and (3) strengthening the detected object: acquiring the rough machining connecting rod piece after the dynamic balance detection in the step S3, and carrying out shot blasting on the inner side wall of the rough machining connecting rod piece, wherein the diameter of a steel shot adopted in the shot blasting is 50-60 meshes, and the pressure of the shot blasting is 0.6MPa, so as to obtain a reinforced connecting rod piece;
s5: and (3) finishing the reinforced object: taking out the reinforced connecting rod piece in the step S4, fixedly clamping one end of the reinforced connecting rod piece, carrying out finish machining on the non-clamping position of the reinforced connecting rod piece, clamping the other end of the reinforced connecting rod piece, carrying out finish machining on the exposed part to obtain a finish machining connecting rod piece, detecting the finish machining connecting rod piece through a detection tool, and judging the size of the finish machining connecting rod piece to be a qualified product within an error range, otherwise, judging the size of the finish machining connecting rod piece to be a non-qualified product;
non-qualified products include the following two cases:
the first method comprises the following steps: the size of the non-qualified product is smaller than the size of the corresponding position of the connecting rod standard component, and the size difference exceeds the error range, and at the moment, the non-qualified product is discarded;
and the second method comprises the following steps: the size of the non-qualified product is larger than that of the corresponding position of the connecting rod standard part, at the moment, the non-qualified product is subjected to finish machining again, and the position with the improper size is cut until the non-qualified product becomes a qualified product or is discarded;
s6: quenching the finished article: acquiring the qualified products obtained in the step S5 after finish machining, and quenching the qualified products to ensure that the quenched qualified products are suitable for the use environment of the high-pressure plunger pump;
s7: and (3) packaging and processing of finished products: and (4) obtaining the qualified product quenched in the step S6.
Example 3:
as shown in fig. 1: a processing technology of a high-pressure plunger pump connecting rod specifically comprises the following processing steps:
s1: obtaining a connecting rod blank: the method comprises the steps of formulating a blank according to requirements, wherein the size and the material of the blank meet the processing requirements, inspecting the blank, and avoiding obvious defects of the blank to obtain a primary inspection blank;
s2: measuring and roughly machining a blank: the method comprises the following steps of obtaining a primary detection blank, measuring the size of the primary detection blank, wherein the size of each position of the primary detection blank is not less than 10mm of a connecting rod standard part, the connecting rod standard part is composed of a connecting rod big end, a connecting rod small end and a connecting piece connected between the connecting rod big end and the connecting rod small end, clamping one end of the measured qualified blank, carrying out machining operation on other non-clamped positions of the qualified blank, clamping one end of the machining operation of the qualified blank, and carrying out machining operation on the other end of the machining operation of the qualified blank to obtain a rough machining connecting rod part;
the connecting rod standard component is of a symmetrical structure, and the machining amount of the rough machining connecting rod component is obtained through dynamic balance detection;
the machining operation of other non-clamping positions of the qualified blank comprises cutting, chamfering and drilling, when the qualified blank is drilled, the qualified blank needs to be machined in place at one time without machining allowance, and the hole formed after drilling is subjected to shot blasting;
shot peening, also known as shot peening, is one of the effective methods for improving the fatigue life of parts, and is to spray high-speed shot flow onto the surface of a metal workpiece to plastically deform the surface layer of the metal workpiece to form a strengthening layer with a certain thickness, and to form a high residual compressive stress in the strengthening layer.
For low strength materials, shot peening can produce a good surface strengthening layer, but for high strength materials, shot peening can hardly form a distinct strengthening layer, but can introduce strong compressive residual stresses.
When the other end of the qualified blank is processed, the processed end of the qualified blank is clamped after being coated with a protective layer, and the protective layer is made of rubber;
s3: and (3) detecting the dynamic balance of the roughly processed object: acquiring the rough machining connecting rod piece in the step S2, coaxially clamping one end of the rough machining connecting rod piece on a turntable, driving the turntable to rotate, measuring the dynamic balance condition of the rough machining connecting rod piece, acquiring dynamic balance data and providing machining amount data for the finish machining of the rough machining connecting rod piece;
s4: and (3) strengthening the detected object: acquiring the rough machining connecting rod piece after the dynamic balance detection in the step S3, and carrying out shot blasting on the inner side wall of the rough machining connecting rod piece, wherein the diameter of a steel shot adopted in the shot blasting is 50-60 meshes, and the pressure of the shot blasting is 0.7MPa, so as to obtain a reinforced connecting rod piece;
s5: and (3) finishing the reinforced object: taking out the reinforced connecting rod piece in the step S4, fixedly clamping one end of the reinforced connecting rod piece, carrying out finish machining on the non-clamping position of the reinforced connecting rod piece, clamping the other end of the reinforced connecting rod piece, carrying out finish machining on the exposed part to obtain a finish machining connecting rod piece, detecting the finish machining connecting rod piece through a detection tool, and judging the size of the finish machining connecting rod piece to be a qualified product within an error range, otherwise, judging the size of the finish machining connecting rod piece to be a non-qualified product;
non-qualified products include the following two cases:
the first method comprises the following steps: the size of the non-qualified product is smaller than the size of the corresponding position of the connecting rod standard component, and the size difference exceeds the error range, and at the moment, the non-qualified product is discarded;
and the second method comprises the following steps: the size of the non-qualified product is larger than that of the corresponding position of the connecting rod standard part, at the moment, the non-qualified product is subjected to finish machining again, and the position with the improper size is cut until the non-qualified product becomes a qualified product or is discarded;
s6: quenching the finished article: acquiring the qualified product after finish machining obtained in the step S5, and quenching the qualified product to ensure that the quenched qualified product is suitable for the use environment of the high-pressure plunger pump;
s7: and (3) packaging and processing of finished products: and (4) obtaining the qualified product quenched in the step S6.
According to the three embodiments, the service life of the obtained final qualified product is increased 1/10 compared with the service life of the connecting rod processed by the common process. The specific parameters are as follows:
the foregoing is a detailed description of the invention with reference to specific embodiments, and the practice of the invention is not to be construed as limited thereto. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (6)
1. A high-pressure plunger pump connecting rod processing technology is characterized in that: the processing technology of the high-pressure plunger pump connecting rod specifically comprises the following processing steps:
s1: obtaining a connecting rod blank: the method comprises the steps of formulating a blank according to requirements, wherein the size and the material of the blank meet the processing requirements, inspecting the blank, and avoiding obvious defects of the blank to obtain a primary inspection blank;
s2: measuring and roughly machining a blank: acquiring a primary detection blank, measuring the size of the primary detection blank, wherein the size of each position of the primary detection blank is not less than 4-10mm of the connecting rod standard part, taking the blank as a qualified blank, clamping one end of the measured qualified blank, performing machining operation on other non-clamped positions of the qualified blank, clamping one end of the machining operation of the qualified blank, and performing machining operation on the other end of the machining operation of the qualified blank to obtain a rough machining connecting rod part;
s3: and (3) detecting the dynamic balance of the roughly processed object: acquiring the rough machining connecting rod piece in the step S2, coaxially clamping one end of the rough machining connecting rod piece on a turntable, driving the turntable to rotate, measuring the dynamic balance condition of the rough machining connecting rod piece, acquiring dynamic balance data and providing machining amount data for the finish machining of the rough machining connecting rod piece;
s4: and (3) strengthening the detected object: acquiring the rough machining connecting rod piece after the dynamic balance detection in the step S3, and carrying out shot blasting on the inner side wall of the rough machining connecting rod piece, wherein the diameter of a steel shot adopted in the shot blasting is 50-60 meshes, and the pressure of the shot blasting is 0.5-0.7 MPa, so as to obtain a reinforced connecting rod piece;
s5: and (3) finishing the reinforced object: taking out the reinforced connecting rod piece in the step S4, fixedly clamping one end of the reinforced connecting rod piece, carrying out finish machining on the non-clamping position of the reinforced connecting rod piece, clamping the other end of the reinforced connecting rod piece, carrying out finish machining on the exposed part to obtain a finish machining connecting rod piece, detecting the finish machining connecting rod piece through a detection tool, and judging the size of the finish machining connecting rod piece to be a qualified product within an error range, otherwise, judging the size of the finish machining connecting rod piece to be a non-qualified product;
s6: quenching the finished article: acquiring the qualified product after finish machining obtained in the step S5, and quenching the qualified product to ensure that the quenched qualified product is suitable for the use environment of the high-pressure plunger pump;
s7: and (3) packaging and processing of finished products: and (4) obtaining the qualified product quenched in the step S6.
2. The high-pressure plunger pump connecting rod processing technology of claim 1, wherein: the connecting rod standard part consists of a connecting rod big end, a connecting rod small end and a connecting piece connected between the connecting rod big end and the connecting rod small end.
3. The high-pressure plunger pump connecting rod processing technology of claim 1, wherein: in the step S2, the machining operations for the other non-clamped positions of the acceptable blank include cutting, chamfering, and drilling, and when the acceptable blank is drilled, the acceptable blank needs to be machined in place at one time without a machining allowance, and the hole formed after drilling is shot-blasted by shot-blasting.
4. The high-pressure plunger pump connecting rod processing technology of claim 1, wherein: in the step S2, when the other end of the qualified blank is processed, the processed end of the qualified blank is covered with a protective layer, and then clamped, wherein the protective layer is made of rubber.
5. The high-pressure plunger pump connecting rod processing technology of claim 1, wherein: the connecting rod standard component is of a symmetrical structure, and the machining amount of the rough machining connecting rod component is obtained through dynamic balance detection.
6. The high-pressure plunger pump connecting rod processing technology of claim 1, wherein: the non-qualified product in the step S5 includes the following two cases:
the first method comprises the following steps: the size of the non-qualified product is smaller than the size of the corresponding position of the connecting rod standard component, and the size difference exceeds the error range, and at the moment, the non-qualified product is discarded;
and the second method comprises the following steps: and the size of the non-qualified product is larger than that of the corresponding position of the connecting rod standard part, and at the moment, the non-qualified product is subjected to finish machining again, and the position with the improper size is cut until the non-qualified product becomes a qualified product or is discarded.
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| CN111421304A (en) * | 2020-04-08 | 2020-07-17 | 湖北中油科昊机械制造有限公司 | High-pressure plunger pump connecting rod processing technology device |
| CN111515639A (en) * | 2020-04-23 | 2020-08-11 | 宝鸡石油机械有限责任公司 | Processing method of plunger pump connecting rod assembly |
| CN111745360A (en) * | 2020-07-09 | 2020-10-09 | 湖南南方通用航空发动机有限公司 | Machining method for casting impeller of blade blower |
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