CN114087957A - Measurement structure for processing high-precision frame hole of reciprocating pump - Google Patents
Measurement structure for processing high-precision frame hole of reciprocating pump Download PDFInfo
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- CN114087957A CN114087957A CN202111608876.0A CN202111608876A CN114087957A CN 114087957 A CN114087957 A CN 114087957A CN 202111608876 A CN202111608876 A CN 202111608876A CN 114087957 A CN114087957 A CN 114087957A
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- 238000012545 processing Methods 0.000 title claims abstract description 9
- 238000005259 measurement Methods 0.000 title claims description 52
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000003754 machining Methods 0.000 claims description 18
- 238000009434 installation Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims 1
- 238000004088 simulation Methods 0.000 claims 1
- 239000003208 petroleum Substances 0.000 abstract description 3
- 230000006870 function Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
- G01B5/12—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters internal diameters
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Abstract
The invention discloses a measuring structure for processing a reciprocating pump high-precision frame hole, which relates to the field of petroleum engineering equipment and particularly comprises various hole measuring and comparing dies of a frame, an inner diameter micrometer, a fastening screw, a measuring clamp, an adjusting screw, a locking clamp, the frame, a boring rod, a frame high-precision hole, a positioning groove, a process hole, a lock catch and the like. The influence of ambient temperature on the measuring orifice is also avoided.
Description
Technical Field
The invention relates to the field of petroleum engineering equipment, in particular to a measuring structure for machining a high-precision frame hole of a reciprocating pump.
Background
Two reciprocating pumps with very similar structures, namely a drilling pump and a fracturing pump, appear in the field of petroleum engineering equipment. The two reciprocating pumps have a large frame, large volume and heavy weight, for example, the frame of the drilling pump has the length of 2700mm-2800mm, the width of 2000 mm-2200 mm, the height of 1790mm-2000mm and the weight of 6500kg-8000 kg. The main motors for driving the reciprocating pumps are arranged on the frames of the two reciprocating pumps, a crankshaft component, a connecting rod component, a cross head component, a valve box component, a lubricating system component and a spraying system component are arranged, almost all key components of the reciprocating pumps are connected together through the frames, the relative position relation among all the components is ensured by the frames, the service life of a friction pair of the reciprocating pump (including a sliding bearing friction pair of the connecting rod component, a rolling bearing friction pair of the crankshaft, a rolling bearing friction pair of the motor, a gear friction pair, a cross head and a slide way friction pair of a power end, a pull rod and a sealing friction pair, a cylinder sleeve and a piston friction pair of a hydraulic end and the like) is long, the precision of the frames of the reciprocating pumps needs to be improved, and the precision of the frames of the reciprocating pumps is a comprehensive level representing the design and the manufacture of the reciprocating pumps. The design and manufacture enterprises of the prior high-precision reciprocating pump provide promise for users, and provide a quality target of free 10-year packet repair (the prior reciprocating pump is free 1-year packet repair), the proposed target guarantee measures firstly require that the precision of a reciprocating pump frame is high, but because the frame is large in size and the distance of various holes is very large, the quality target can only be met by a boring processing method, and because the dimensional tolerance of each hole of the frame is 6 grades, the form and position tolerance between axes is between 4 grades and 6 grades, or because the external dimension of the frame is large, the hole distance inside the frame is large, and the form and position tolerance of the axes is also large, the processing precision can not be guaranteed by expensive large numerical control equipment under the common environmental temperature, the cost is high, in order to completely meet the high-precision requirement of the reciprocating pump frame, a processing method of a special equipment structure matched with a boring bar is adopted, and because the boring bar is adopted, the internal diameter micrometer is difficult to measure the size of the inner hole of the frame, even if no boring bar is provided, the technical requirements of an operator for measuring the inner hole by using the inside micrometer are very high, namely before the hole is measured by using the inside micrometer, the zero position of the micrometer head is firstly corrected by using a correction clamping plate, the large-size correction clamping plate is a non-standard part and is expensive to customize, when the inside micrometer is used to measure the aperture formally, the measuring surface of the contact of the inside micrometer is supported on the measured surface, the micro-cylinder is adjusted to make the measuring surface on one side of the micro-cylinder swing in the radial section of the aperture to find out the maximum dimension, swinging in the axial section of the hole to find out the minimum size, repeating the adjustment for several times, finally screwing the screw, taking out the inside micrometer and reading, therefore, the high precision of the frame can be ensured, and the problems to be solved are solved by the measurement structure for processing the high-precision frame hole of the reciprocating pump, which can overcome the expensive calibration clamp plate and the overhigh technical requirement for operators.
Disclosure of Invention
The invention aims to provide a measuring structure for machining a high-precision frame hole of a reciprocating pump.
The technical scheme of the invention is as follows:
the invention is implemented by taking a five-cylinder drilling pump with the height of 2200hp as an example.
The method is characterized in that the size of an inner hole of a rack is difficult to measure by an inner diameter micrometer, the technical requirement of an operator for measuring the inner hole by the inner diameter micrometer is very high, namely before the hole is measured by the inner diameter micrometer, a calibrating clamping plate is firstly used for calibrating the zero position of a micrometer head, when the hole is measured by the inner diameter micrometer formally, a contact measuring surface of the inner diameter micrometer is required to be supported on a measured surface, a micro-cylinder is adjusted, the measuring surface on one side of the micro-cylinder swings in the radial section of the hole to find out the maximum size, then swings in the axial section of the hole to find out the minimum size, the adjustment is required to be repeated for several times, and finally a screw is screwed to take out the inner diameter micrometer and read. In addition, the boring rod is adopted to bore the inner hole of the rack, the inside micrometer cannot measure, and in order to meet the design requirement of the rack and overcome the difficulty, the specific measures are adopted as follows (taking the measurement of the crankshaft hole of the rack as an example).
When a crankshaft hole is measured by a rack, a rack crankshaft hole measurement comparison die is designed, the nominal size of a comparison hole of the rack crankshaft hole measurement comparison die is the same as the nominal size of the rack crankshaft hole, the size of the comparison hole is a determined value after the rack crankshaft hole measurement comparison die is subjected to precision machining and precision measurement, the material of the rack crankshaft hole measurement comparison die is consistent with that of the rack, the thermal expansion coefficient is the same, the rack crankshaft hole measurement comparison die and the rack are placed in the same temperature environment, machining allowance is very small due to the process of rack finish machining of the hole, cutting heat can be ignored, the difference between the comparison hole and the rack crankshaft hole is compared by using the same inside micrometer, the size of the rack crankshaft hole is measured, the large-size inside micrometer is not required to be provided with a large-size expensive calibration clamping plate, and the influence of environment temperature on the measurement of the crankshaft hole can be avoided.
The step of measuring the comparison hole by using a comparison method comprises (1) placing an inner micrometer into a mounting inner micrometer hole of a measuring clamp, contacting the inner micrometer with an adjusting screw, screwing a fastening screw into a fastening screw internal thread to fix the inner micrometer, and mounting another inner micrometer at the other end of the measuring clamp by using the same method, wherein the adjusting screw has the function of adjusting the distance between a measuring contact of the inner micrometer and measuring contacts of the two inner micrometers to be smaller than but close to the size of the comparison hole; (2) the inner circle of the measuring clamp (the same as the nominal size of the excircle of the boring bar) is placed on the excircle (the same as the nominal size of the excircle of the boring bar) of a simulated boring bar of a frame crankshaft hole measuring and comparing die, the inner circle of the clamping clamp is also placed on the excircle of the simulated boring bar, after the two lock catch lower parts and the lock catch upper part are combined, the outer circles of the measuring clamp, the locking clamp and the simulated boring bar are fixed together, and the excircle of the simulated boring bar is contacted with the inner circle of the clamping clamp; (3) and similarly, the micro-cylinder of the other side of the inner micrometer is adjusted to enable the measuring contact to gradually approach the comparing hole, the 'clamping' sound is heard, the measuring contact is gradually approached to the comparing hole, the 'clamping' sound is heard, the measuring contact is indicated to contact the comparing hole, and the reading is recorded. The method replaces the method for measuring the inner hole of the common inside micrometer, namely, the method that the contact measuring surface of the inside micrometer needs to be supported on the measured surface, the micro-cylinder is adjusted, the measuring surface on one side of the micro-cylinder swings in the radial section of the hole, the maximum size is found out, then the micro-cylinder swings in the axial section of the hole, the minimum size is found out, the adjustment needs to be repeated for several times, finally, the screw is screwed, and the inside micrometer is taken out and read can accurately read data only by one operation. After the number of the comparison holes is read, a micro-cylinder of the internal micrometer is adjusted to separate the measuring contact from the comparison holes, a micro-cylinder of the other internal micrometer is adjusted to separate the measuring contact from the comparison holes, the separation distance meets the requirement that the separation distance is smaller than the size of the crankshaft hole to be measured, the two lock catch lower parts and the two lock catch upper parts are loosened, and the measuring clamp and the locking clamp can be taken down from the excircle of the simulated boring rod to measure the size of the crankshaft hole.
The method comprises the steps that (1) a measuring clamp, a locking clamp and a boring bar are contacted near a crankshaft hole, two lock catch lower parts and two lock catch upper parts are locked, and the measuring clamp, the locking clamp and the boring bar are combined together; (2) and (4) reading two readings of the two inside micrometer by using a method of measuring and comparing the same reading of the hole, and comparing the two readings with the reading of the hole to be measured and compared to obtain the inside diameter size of the crankshaft hole.
The frame crankshaft hole measurement comparison die is designed with a positioning groove, the symmetrical surface of the positioning groove is on the diameter of the comparison hole, when the comparison hole of the frame crankshaft hole measurement comparison die is processed and detected, the value of the comparison hole can be conveniently measured by an inner micrometer, and the width of the positioning groove is the same as the outer diameter of the inner micrometer. The frame crankshaft hole measurement comparison die is further designed with a fabrication hole, the position of the fabrication hole is close to the comparison hole, and the micro-cylinder is convenient to rotate when the inner hole is measured.
The sizes of holes of the machine frame needing finish machining are different, only one corresponding hole measurement comparison die needs to be changed, the length of the corresponding measurement clamp for installing the inside micrometer is equal to the size of other parts, and the measurement principle is completely the same.
By adopting the structure of the invention, the boring bar which is a factor which is not beneficial to measuring the size of the inner hole is changed into a condition which is beneficial to measuring the size of the inner hole, because the axes of two installed inner micrometer holes of the measuring clamp are arranged on the diameter of the inner hole of the clamp, when the measuring clamp, the locking clamp and the boring bar are combined together, the connecting line of two measuring contacts is the diameter of the inner hole, the function of ' needing to support the measuring surface of the inner micrometer contact on the measured surface and adjust the micro-cylinder to enable the measuring surface at one side of the micro-cylinder to swing in the radial cross section of the hole and find out the maximum size ' is replaced, because the inner hole of the clamp is combined with the boring bar, the swinging of the measuring clamp in the axial cross section of the measuring inner hole is limited, the function of ' needing to swing in the axial cross section of the hole and find out the minimum size, the adjustment needs to be repeated for a plurality of times and finally the screw is screwed, and taking out the inside micrometer and reading.
Drawings
FIG. 1-an exploded view of a measurement configuration for reciprocating pump high precision frame hole machining;
FIG. 2-a front view of a measuring structure for reciprocating pump high precision frame hole machining;
FIG. 3-section A-A of FIG. 2;
FIG. 4-a perspective view of an actual measurement of the crankshaft hole machining of a reciprocating pump high precision frame;
FIG. 5-a front view of a measuring structure of a reciprocating pump high precision frame mud guard mounting hole;
fig. 6-a cross-sectional view of fig. 5.
The reference numerals are as follows
1-a frame crankshaft hole measuring comparison die, 2-an inner diameter micrometer, 3-a fastening screw, 4-a measuring clamp, 5-an adjusting screw, 6-an inner diameter micrometer, 7-a locking clamp, 8-a frame, 9-a boring bar, 10-a crankshaft hole, 1.1-a comparison hole, 1.2-a positioning groove, 1.3-an inner end surface, 1.4-an excircle of a simulated boring bar, 1.5-a process hole, 2.1-a micro cylinder, 2.2-a measuring contact, 4.1-an inner diameter micrometer mounting hole, 4.2-a locking upper part, 4.3-an adjusting screw inner thread, 4.4-a fastening screw inner thread, 6.1-a micro cylinder, 6.2-a measuring contact, 7.1-a locking lower part, 7.2-a clamp inner hole and 7.3-a clamp end surface.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The embodiments of the present invention are not limited to the following examples, and various changes made without departing from the spirit of the present invention are within the scope of the present invention.
The invention is implemented by taking a five-cylinder reciprocating pump with the height of above 2200hp as an example.
Referring to fig. 1 to 6, the measurement structure for high-precision machining of a frame hole of a reciprocating pump according to the present embodiment includes a frame crankshaft hole measurement comparison die 1, an inside micrometer 2, a fastening screw 3, a measurement clamp 4, an adjusting screw 5, an inside micrometer 6, a locking clamp 7, a frame 8, a boring bar 9, a crankshaft hole 10, a comparison hole 1.1, a positioning slot 1.2, an inner end surface 1.3, a simulated boring bar outer circle 1.4, a process hole 1.5, a micro-cylinder 2.1, a measurement contact 2.2, an installation inside micrometer hole 4.1, a lock catch upper part 4.2, an installation adjusting screw inner thread 4.3, an installation fastening screw inner thread 4.4, a micro-cylinder 6.1, a measurement contact 6.2, a lock catch lower part 7.1, a clamp inner hole 7.2, and a clamp end surface 7.3.
Referring to fig. 4, in order to satisfy the functional requirement of long service life of the reciprocating pump friction pair, the hole size precision of the frame 8 for installing the rolling bearing, the sliding bearing, the sealing ring and the cylinder sleeve needs to be designed to be 6-grade precision, because the frame 8 has large volume and the distance of various holes is very large, the hole size precision can only be satisfied by a boring processing method, and because the functional requirement of long service life of the reciprocating pump friction pair is satisfied, the form and position tolerance between the axes of the holes of the frame must be between 4 and 6 grades, and because the frame has large external dimension, the hole distance inside the frame is large and the form and position tolerance of the axes is large, the processing by expensive large-scale numerical control equipment at normal environmental temperature can not only ensure the processing precision, but also has high cost, in order to completely satisfy the high precision requirement of the reciprocating pump frame, the processing method of matching the special equipment structure with the boring bar is adopted, because the boring bar is adopted, the measuring of the inner diameter of the inner hole of the frame by a micrometer is difficult, even if no boring bar is provided, the technical requirements of an operator for measuring the inner hole by using the inside micrometer are very high, namely before the hole is measured by using the inside micrometer, firstly, a calibration clamp plate is used for calibrating the zero position of a micrometer head, when the hole diameter is measured by using the inside micrometer formally, a contact measuring surface of the inside micrometer needs to be supported on a measured surface, a micro-cylinder is adjusted, the measuring surface on one side of the micro-cylinder swings in the radial section of the hole to find out the maximum dimension, then, the measuring surface swings in the axial section of the hole to find out the minimum dimension, the adjustment needs to be repeated for several times, and finally, a screw is screwed, and the inside micrometer is taken out and read. The specific measures adopted are as follows (taking the measurement of a crankshaft hole of the rack as an example).
Referring to fig. 1 and 4, when a crankshaft hole 10 is to be measured in a frame 8, a crankshaft hole measurement comparison die 1 is designed, the nominal size of a comparison hole 1.1 of the crankshaft hole measurement comparison die 1 is the same as the nominal size of the crankshaft hole 10, after the frame crankshaft hole measurement comparison die 1 is precisely machined and precisely measured, the size of the comparison aperture 1.1 is a determined value, the material of the frame crankshaft aperture measurement comparison die 1 is identical to the material of the frame 8, the thermal expansion coefficients are the same, the hole is placed in the environment with the same temperature as the frame, the machining allowance is very small due to the process of fine machining the hole by the frame, the cutting heat can be ignored, the difference between the comparative hole 1.1 and the crankshaft hole 10 is compared by using the same inside micrometer 2 and the same inside micrometer 6, therefore, the size of the crankshaft hole 10 is measured, a large-size internal micrometer is not required to be provided with a large-size calibration clamping plate with high price, and the influence of the environmental temperature on the measurement of the crankshaft hole 10 can be avoided.
Referring to fig. 1, 2 and 3, the step of measuring the comparison hole 1.1 by a comparison method is that (1) an internal micrometer 2 is placed into an installation internal micrometer hole 4.1 of a measurement clamp 4, the internal micrometer 2 is contacted with an adjusting screw 5, a fastening screw 3 is screwed into an installation fastening screw internal thread 4.4, the internal micrometer 2 is fixed, an internal micrometer 6 is installed at the other end of the measurement clamp 4 by the same method, and the adjusting screw 5 has the function of adjusting the distance between a measurement contact 2.2 of the internal micrometer 2 and the measurement contact 6.2 of the internal micrometer 6 to be smaller than but close to the size of the comparison hole 1.1; (2) a clamp inner hole 7.2 (the same as the nominal size of the excircle of the boring bar) of the measuring clamp 4 is placed on a simulated boring bar excircle 1.4 (the same as the nominal size of the excircle of the boring bar) of the frame crankshaft hole measuring comparison die 1, a clamp inner hole 7.2 of the locking clamp 7 is also placed on the simulated boring bar excircle 1.4, after the two lock catch lower parts 7.1 and the lock catch upper part 4.2 are combined, the measuring clamp 4, the locking clamp 7 and the simulated boring bar excircle 1.4 are fixed together, and the simulated boring bar excircle 1.4 is contacted with the clamp inner hole 7.2; (3) adjusting the micro-cylinder 2.1 of the inside micrometer 2 to enable the measuring contact 2.2 to gradually approach the comparison hole 1.1, hearing the sound of 'stuck' to indicate that the measuring contact 2.2 is contacted with the comparison hole 1.1, and then reading, and similarly, adjusting the micro-cylinder 6.1 of the inside micrometer 6 to enable the measuring contact 6.2 to gradually approach the comparison hole 1.1, hearing the sound of 'stuck' to indicate that the measuring contact 6.2 is contacted with the comparison hole 1.1, and then recording the reading. The method replaces the method for measuring the inner hole of the common inside micrometer, namely, the method that the contact measuring surface of the inside micrometer needs to be supported on the measured surface, the micro-cylinder is adjusted, the measuring surface on one side of the micro-cylinder swings in the radial section of the hole, the maximum size is found out, then the micro-cylinder swings in the axial section of the hole, the minimum size is found out, the adjustment needs to be repeated for several times, finally, the screw is screwed, and the inside micrometer is taken out and read can accurately read data only by one operation. After the number of the comparison holes 1.1 is read, the micro-cylinder 2.1 of the inner micrometer 2 is adjusted to separate the measuring contact 2.2 from the comparison holes 1.1, the micro-cylinder 6.1 of the inner micrometer 6 is adjusted to separate the measuring contact 6.2 from the comparison holes 1.1, the separation distance meets the requirement that the separation distance is smaller than the size of the crankshaft hole 10 to be measured, the two lock catch lower parts 7.1 and the lock catch upper parts 4.2 are loosened, and the measuring clamp 4 and the locking clamp 7 can be taken down from the excircle 1.4 of the simulated boring bar to measure the size of the crankshaft hole 10.
Referring to fig. 4, the step of measuring the crankshaft hole 10 of the frame 8 is that (1) near the crankshaft hole 10, the measuring clamp 4, the locking clamp 7 and the boring bar 9 are contacted, two lock catch lower parts 7.1 and two lock catch upper parts 4.2 are locked, and the measuring clamp 4, the locking clamp 7 and the boring bar 9 are combined together; (2) the two readings of the inside micrometer 2 and the inside micrometer 6 are read by a method of measuring the same reading of the comparison hole 1.1, and compared with the reading of the measurement comparison hole 1.1, the inside diameter size of the crankshaft hole 10 is obtained.
Referring to fig. 1, the frame crankshaft hole measuring and comparing die 1 is designed with a positioning groove 1.2, the symmetrical surface of the positioning groove 1.2 is on the diameter of the comparing hole 1.1, when the diameter of the comparing hole 1.1 of the frame crankshaft hole measuring and comparing die 1 is processed and detected, the value of the comparing hole 1.1 can be conveniently measured by an inside micrometer, and the width of the positioning groove 1.2 is the same as the outside diameter of the inside micrometer. The frame crankshaft hole measurement comparison die 1 is further designed with a process hole 1.5, the position of the process hole 1.5 is close to the comparison hole 1.1, and the micro-cylinder 2.1 and the micro-cylinder 6.1 can be rotated conveniently when an inner hole is measured.
The sizes of holes of the frame 8 needing finish machining are different, only one corresponding hole measurement comparison die needs to be changed, the length of the inner micrometer installed on the corresponding measurement clamp is the same as that of other parts, and the measurement principle is completely the same, for example, fig. 5 is a front view of a measurement structure of a reciprocating pump high-precision frame mud guard installation hole, and fig. 6 is a cross-sectional view of a-a of fig. 5.
By adopting the structure of the invention, the boring bar which is a factor which is not beneficial to measuring the size of the inner hole is changed into a condition which is beneficial to measuring the size of the inner hole, because the axes of two installed inside micrometer holes 4.1 of the measuring clamp 4 are on the diameter of the inner hole 7.2 of the clamp, when the measuring clamp 4, the locking clamp 7 and the boring bar 9 are combined together, the connecting line of the measuring contact 2.2 and the measuring contact 6.2 is just the diameter of the inner hole, the function of 'needing to support the measuring surface of the inside micrometer contact on the measured surface, adjusting a micro-cylinder to enable the measuring surface on one side of the micro-cylinder to swing in the radial cross section of the hole and finding out the maximum size' is replaced, because the inner hole 7.2 of the clamp is combined with the boring bar, the swing of the measuring clamp 4 in the axial cross section of the measuring inner hole is limited, the function of replacing the need of swinging in the axial cross section of the hole of the inside micrometer to measure the inner hole to find out the minimum size, the adjustment needs to be repeated for a plurality of times, and finally, screwing the screw, and taking out the inside micrometer and reading.
The above detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art, and these changes are within the protection of the present invention and also within the protection scope of the present invention.
Claims (6)
1. The utility model provides a measuring structure of reciprocating pump high accuracy frame spot facing work, a serial communication port, frame bent axle hole measurement comparison module (1), inside micrometer (2), fastening screw (3), measure clamp (4), adjusting screw (5), inside micrometer (6), locking clamp (7), frame (8), boring bar (9), bent axle hole (10), compare hole (1.1), constant head tank (1.2), interior terminal surface (1.3), simulation boring bar excircle (1.4), fabrication hole (1.5), micro-section cylinder (2.1), measure contact (2.2), installation inside micrometer hole (4.1), hasp top part (4.2), installation adjusting screw internal thread (4.3), installation fastening screw internal thread (4.4), micro-section cylinder (6.1), measure contact (6.2), lower part (7.1), hasp hole (7.2), clamp terminal surface (7.3).
2. A reciprocating pump high precision frame hole machining measuring structure as claimed in claim 1, when the frame (8) is to measure the crankshaft hole (10), a frame crankshaft hole measurement comparison die (1) is designed, the nominal size of a comparison hole (1.1) of the frame crankshaft hole measurement comparison die (1) is the same as the nominal size of a frame crankshaft hole (10), after the frame crankshaft hole measurement comparison die (1) is subjected to precision machining and precision measurement, the size of the comparison hole (1.1) is a definite value, the material of the frame crankshaft hole measurement comparison die (1) is consistent with the material of the frame (8) and the thermal expansion coefficient is the same, and the frame is placed in the environment with the same temperature, the difference between the hole (1.1) and the frame crankshaft hole (10) is compared by using the same inside micrometer (2) and the same inside micrometer (6), and the size of the frame crankshaft hole (10) is measured by using a comparison method.
3. The measurement structure for processing the high-precision frame hole of the reciprocating pump according to claim 1, wherein the requirement for measuring the comparison hole (1.1) by using a comparison method is that (A) the internal micrometer (2) is placed in the installation internal micrometer hole (4.1) of the measurement clamp (4), the internal micrometer (2) is contacted with the adjusting screw (5), the fastening screw (3) is screwed into the internal thread (4.4) of the fastening screw to fix the internal micrometer (2), the internal micrometer (6) is installed at the other end of the measurement clamp (4) by using the same method, and the adjusting screw (5) has the function of adjusting the distance between the measurement contact (2.2) of the internal micrometer (2) and the measurement contact (6.2) of the internal micrometer (6) to be smaller than but close to the size of the comparison hole (1.1); (B) the inner circle (7.2) (the same as the nominal size of the excircle of the boring bar) of the measuring clamp (4) is placed on the simulated boring bar excircle (1.4) (the same as the nominal size of the excircle of the boring bar) of the frame crankshaft hole measuring comparison die (1), the inner circle (7.2) of the locking clamp (7) is also placed on the simulated boring bar excircle 1.4, after the two lock catch lower parts (7.1) and the lock catch upper parts (4.2) are combined, the measuring clamp (4), the locking clamp (7) and the simulated boring bar excircle (1.4) are fixed together, and the simulated boring bar excircle (1.4) is contacted with the inner circle (7.2) of the clamp.
4. The measuring structure for the high-precision frame hole processing of the reciprocating pump according to claim 1, wherein a crankshaft hole (10) of the measuring frame (8) is required to be (A) in the vicinity of the crankshaft hole (10), the measuring clamp (4), the locking clamp (7) and the boring bar (9) are contacted, two lock catch lower parts (7.1) and two lock catch upper parts (4.2) are locked, and the measuring clamp (4), the locking clamp (7) and the boring bar (9) are combined together; (B) and (3) reading two readings of the inside micrometer (2) and the inside micrometer (6) by using a method of measuring the same reading of the comparison hole (1.1), and comparing the two readings with the reading of the measurement comparison hole (1.1) to obtain the inside diameter size of the crankshaft hole (10).
5. The measuring structure for the high-precision frame hole machining of the reciprocating pump according to claim 1, wherein a frame crankshaft hole measuring and comparing die (1) is designed with a positioning groove (1.2), a symmetrical surface of the positioning groove (1.2) is arranged on the diameter of the comparing hole (1.1), the width of the positioning groove (1.2) is the same as the outer diameter of an inner micrometer, the frame crankshaft hole measuring and comparing die (1) is further designed with a fabrication hole (1.5), and the fabrication hole (1.5) is close to the comparing hole (1.1).
6. The measuring structure for the hole machining of the reciprocating pump high-precision machine frame according to claim 1, wherein the sizes of holes of the machine frame (8) needing to be subjected to finish machining are different, only one corresponding hole measuring comparison die needs to be changed, the length of an inner micrometer installed on a corresponding measuring clamp is the same as that of other parts, and the measuring principles are completely the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111608876.0A CN114087957A (en) | 2021-12-27 | 2021-12-27 | Measurement structure for processing high-precision frame hole of reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111608876.0A CN114087957A (en) | 2021-12-27 | 2021-12-27 | Measurement structure for processing high-precision frame hole of reciprocating pump |
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| Publication Number | Publication Date |
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| CN114087957A true CN114087957A (en) | 2022-02-25 |
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| CN202111608876.0A Pending CN114087957A (en) | 2021-12-27 | 2021-12-27 | Measurement structure for processing high-precision frame hole of reciprocating pump |
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| CN (1) | CN114087957A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2867279Y (en) * | 2006-02-17 | 2007-02-07 | 沪东重机股份有限公司 | Bow inside micrometer |
| CN201964863U (en) * | 2011-02-21 | 2011-09-07 | 浙江轻机实业有限公司 | Inside micrometer with specially-shaped structure |
| CN111102895A (en) * | 2018-10-28 | 2020-05-05 | 国营四达机械制造公司 | Measuring tool and measuring method for wear loss of involute internal spline |
| CN113550895A (en) * | 2021-08-26 | 2021-10-26 | 黄秀芳 | Connecting structure for intermediate rod and piston rod (plunger) of reciprocating pump |
-
2021
- 2021-12-27 CN CN202111608876.0A patent/CN114087957A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2867279Y (en) * | 2006-02-17 | 2007-02-07 | 沪东重机股份有限公司 | Bow inside micrometer |
| CN201964863U (en) * | 2011-02-21 | 2011-09-07 | 浙江轻机实业有限公司 | Inside micrometer with specially-shaped structure |
| CN111102895A (en) * | 2018-10-28 | 2020-05-05 | 国营四达机械制造公司 | Measuring tool and measuring method for wear loss of involute internal spline |
| CN113550895A (en) * | 2021-08-26 | 2021-10-26 | 黄秀芳 | Connecting structure for intermediate rod and piston rod (plunger) of reciprocating pump |
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