CN114029756A - Mounting reference plane for precision machining and measurement of reciprocating pump frame - Google Patents
Mounting reference plane for precision machining and measurement of reciprocating pump frame Download PDFInfo
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- CN114029756A CN114029756A CN202111609159.XA CN202111609159A CN114029756A CN 114029756 A CN114029756 A CN 114029756A CN 202111609159 A CN202111609159 A CN 202111609159A CN 114029756 A CN114029756 A CN 114029756A
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- 238000005259 measurement Methods 0.000 title claims abstract description 74
- 238000003754 machining Methods 0.000 title claims abstract description 32
- 229910052802 copper Inorganic materials 0.000 claims abstract description 81
- 239000010949 copper Substances 0.000 claims abstract description 81
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 77
- 238000009434 installation Methods 0.000 claims abstract description 22
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000003208 petroleum Substances 0.000 abstract description 3
- 238000012545 processing Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 18
- 238000001514 detection method Methods 0.000 description 7
- 239000000725 suspension Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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Abstract
The invention discloses an installation reference plane for precision machining and measurement of a reciprocating pump frame, which relates to the field of petroleum engineering equipment and specifically comprises a lower supporting plate, an M12 inner hexagonal screw washer group, a copper sheet combination, an upper supporting plate, an M8 inner hexagonal screw, a clamp body supporting table, a T-shaped workbench, a T-shaped nut and a frame The mutual coaxiality, parallelism and verticality form and position tolerance of the longitudinal hole of the frame and the bottom plane of the frame can reach 4-level precision, and necessary conditions are created.
Description
Technical Field
The invention relates to the field of petroleum engineering equipment, in particular to an installation reference plane for precision machining and measurement of a reciprocating pump frame.
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. At present, high-precision reciprocating pump design and manufacturing enterprises make a commitment to users, and provide a quality target of free 10-year envelope repair (the current reciprocating pump is free 1-year envelope repair), and the quality target is firstly required to be high in precision by providing such target guarantee measures that the frame of the reciprocating pump is large in size and the distance of various holes is large, the form and position tolerance between each hole and each plane of the frame is between 4 and 6, the frame can only be processed by large numerical control equipment and a special large clamp, and the large three-coordinate measuring machine is used for detection, at present, the qualified frame product is processed on the large numerical control equipment, but the detection on the large three-coordinate measuring machine is unqualified, the form and position tolerance precision of the frame is forced to be reduced, the analysis reason is that the bottom surface of the frame is mounted on a large T-shaped workbench or a special clamp supporting table regardless of the processing of the frame on the large numerical control equipment or the detection of the frame on the large three-coordinate measuring machine, the large-scale T-shaped workbench or a special fixture supporting platform is used as a reference plane for positioning, the flatness accuracy of the large-scale T-shaped workbench or a special fixture supporting platform is low through detection, and can only reach 7-8 levels, the 7-8 level positioning reference plane can not meet the form and position tolerance of each hole and each plane of the frame with 4-6 levels of accuracy, so that the 4-6 level accuracy of the form and position tolerance of each hole and each plane of the frame is required to be met, the necessary condition is that the accuracy of the positioning reference plane is higher than the 4-level accuracy, and the problem to be solved urgently is solved by researching an installation reference plane for precision machining and measurement of the reciprocating pump frame, wherein the 4-6 level accuracy of the form and position tolerance of each hole and each plane of the frame can be achieved.
Disclosure of Invention
The invention aims to provide a mounting reference plane for precision machining and measurement of a reciprocating pump frame.
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 utility model provides an installation reference plane of reciprocating pump frame precision finishing and measurement comprises 8 reference plane units, and every reference plane unit comprises 4 copper sheet combinations, 1 lower supporting plate, 1 upper support plate, 4M 12 hexagon socket head cap screw, 4M 8 hexagon socket head cap screw packing ring group.
4 copper sheet combination installations are between bottom suspension fagging and last backup pad, and the position of putting is in four right angles departments of bottom suspension fagging and last backup pad, and the M8 countersunk head through-hole that passes last backup pad is passed with M8 hexagon socket head cap screw respectively, passes the concave groove of copper sheet combination, and the M8 internal thread of screw in bottom suspension fagging links together bottom suspension fagging and last backup pad. The gradient of the upper surface of going up the backup pad and the lower surface of bottom suspension fagging can be adjusted through the different thickness of 2 copper sheet combinations, and the thickness of 4 copper sheet combinations is confirmed as required, and the thickness of combination can be: 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10mm.
Each datum plane unit is provided with 4 measuring points, the positions of the measuring points are above the corresponding copper sheet combinations, and the measuring values of the measuring points can well reflect the thickness changes of the combined copper sheets at the positions 3mm away from the edges of the M8 countersunk through holes.
Referring to fig. 4 and 5, the datum plane unit is mounted on the upper surface of the supporting platform of the fixture body, and 2M 12 socket head cap screw washers are screwed into M12 internal threads of the supporting platform of the fixture body through the M12 countersunk through hole of the lower supporting plate, so that the lower supporting plate is connected with the supporting platform of the fixture body.
The datum plane unit is installed on the upper surface of the T-shaped workbench, 2M 12 hexagon socket head cap screw washer sets penetrate through M12 countersunk head through holes of the lower supporting plate, are screwed into T-shaped nuts of a T-shaped groove of the T-shaped workbench and are screwed, and the lower supporting plate is connected with the T-shaped workbench.
The positions of the countersunk blind hole of the upper supporting plate, the internal thread of M27 and the countersunk through hole of M12 of the lower supporting plate of the reference plane unit can be changed, namely the upper supporting plate and the lower supporting plate are manufactured to change the two sizes, the other parts are not changed, the change only meets the requirement that the positions of the T-shaped grooves are different, and the function of the reference plane unit is not influenced.
The method for establishing, adjusting and using the mounting reference plane for the precision machining and measurement of the reciprocating pump frame is divided into the following conditions:
the method for establishing the measuring and mounting reference plane on the T-shaped workbench of the three-coordinate measuring machine comprises the following steps:
the measuring and mounting reference plane on the T-shaped worktable of the three-coordinate measuring machine consists of 8 reference plane units which are placed on the surface of the T-shaped worktable, and the method for adjusting the flatness of the 8 reference plane units in a large plane to be within 0.015mm comprises the following steps:
firstly, respectively enabling 2M 12 socket head cap screw washer groups of each datum plane unit to penetrate through M12 countersunk through holes of a lower supporting plate, screwing the washer groups into T-shaped nuts of T-shaped grooves of a T-shaped workbench, screwing the washer groups, and connecting the lower supporting plate and the T-shaped workbench together;
the lower supporting plate and the upper supporting plate are connected together by 4M 8 socket head cap screws, and it is noted that when the lower supporting plate and the upper supporting plate are connected for the first time, 4 copper sheet combinations are not required to be added between the lower supporting plate and the upper supporting plate;
measuring X, Y, Z coordinate values of 32 measurement points in total by three coordinates, analyzing the coordinate values of the 32 points, assuming that the Z coordinate value represents a value in the height direction, finding out the highest value of the Z coordinate value, calculating the difference value between the Z coordinate value and the highest Z coordinate value of each measurement point, detaching 4M 8 socket head cap screws for connecting the lower support plate and the upper support plate together, adding a copper sheet combination between the lower support plate and the upper support plate, wherein the thickness value of the copper sheet combination is the difference value between the measured Z coordinate value and the highest Z coordinate value of the measurement point, and connecting the lower support plate and the upper support plate together by 4M 8 socket head cap screws again;
fourthly, the Z coordinate values of the 32 measuring points are measured again, if the Z coordinate difference of the 32 measuring points is within 0.015mm, the Z coordinate values are qualified, and if the Z coordinate difference of the 32 measuring points is not reached, the Z coordinate difference of the 32 measuring points can meet the standard that the Z coordinate difference of the 32 measuring points is within 0.015mm by performing the measurement again according to the third method.
Secondly, a method for establishing a processing and mounting reference plane of the rack on the upper surface of the support platform of the fixture body comprises the following steps:
after the fixture body supporting table is placed on a measuring reference plane established by three coordinates, an installation reference plane for establishing machining of the rack on the upper surface of the fixture body supporting table also consists of a first reference plane unit, a second reference plane unit, a third reference plane unit, a fourth reference plane unit, a fifth reference plane unit, a sixth reference plane unit, a seventh reference plane unit and an eighth reference plane unit, and the flatness requirement of the 8 reference plane units in a large plane is regulated to be within 0.015 mm:
firstly, respectively enabling 2M 12 socket head cap screw washers of each datum plane unit to penetrate through M12 countersunk through holes of a lower supporting plate, screwing the washer into M12 internal threads of a fixture body supporting platform, screwing the washer and the lower supporting plate together with the fixture body supporting platform;
the adjusting method of the second, third and fourth steps is the same as the adjusting method of the second, third and fourth steps for establishing a measuring and mounting reference plane on the T-shaped workbench of the three-coordinate measuring machine, and the final adjusting data is recorded.
After a frame processing and mounting reference plane established on the upper surface of a clamp body supporting table is adjusted to be qualified by a three-coordinate measuring machine, the clamp body supporting table is mounted on an adjustable sizing block of a workshop cement foundation, a frame processing and mounting reference plane established on the upper surface of the clamp body supporting table is leveled by a horizontal ruler, a frame transverse hole or a frame longitudinal hole is processed by using the processing and mounting reference plane for the first time, a frame after processing is detected and detected in advance in a three-coordinate detection mode, if the parallelism between the axis of the frame transverse hole or the frame longitudinal hole and the bottom plane of the frame is detected to be different from the ideal mounting reference plane, the thickness of 4 copper sheet combinations corresponding to a reference plane unit can be adjusted according to the value of the difference to correct the difference, and the adjustment error of the frame processing and mounting reference plane established on the upper surface of the clamp body supporting table by the horizontal ruler is compensated, so that the requirement for the adjustment error of the frame processing and mounting reference plane established on the upper surface of the high-precision frame can be met, The parallelism between the axis of the longitudinal hole of the frame and the plane of the bottom of the frame is required.
Thirdly, establishing a frame machining and mounting reference plane on a T-shaped workbench of a large numerical control machine tool:
the method for establishing the frame machining and mounting reference plane on the T-shaped workbench of the large numerical control machine tool is basically the same as the method for establishing the measuring and mounting reference plane on the T-shaped workbench of the three-coordinate measuring machine, and only one difference exists, namely X, Y, Z coordinate values of 32 measuring points are measured when the frame machining and mounting reference plane is established on the T-shaped workbench of the large numerical control machine tool, and the data are measured by the numerical control machine tool.
After a rack machining and mounting reference plane is established on a T-shaped workbench of a large numerical control machine tool and adjusted to be qualified, a rack is mounted on the mounting reference plane, a rack longitudinal plane or a rack transverse plane is machined for the first time, three-coordinate measurement and detection are carried out on the machined rack, the perpendicularity between the rack longitudinal plane or the rack transverse plane and a rack bottom plane is detected, if the perpendicularity between the rack longitudinal plane or the rack transverse plane and the rack bottom plane is detected to be different from an ideal mounting reference plane, the thickness of a copper sheet combination corresponding to a reference plane unit can be adjusted according to the difference value to correct, the error between a machining horizontal plane and a machining vertical plane of the numerical control machine tool can be compensated, and the perpendicularity requirement between a high-precision rack longitudinal plane or a rack transverse plane and the rack bottom plane can be met.
The M27 internal thread and the M27 bolt of going up the backup pad function have: firstly, when the copper sheet combination thickness of the reference plane unit is adjusted, the upper supporting plate is detached and installed for use; and secondly, when the rack is arranged on the reference plane, the rack is tightly pressed for use.
The installation reference plane for precisely machining and measuring the reciprocating pump frame is adopted, the height difference of the reference plane is controlled within 0.015mm, the plane size is 2500 mm-4000 mm according to the national standard GB/T1184, the height difference can be controlled within 0.015mm, the precision belongs to 3-level high precision, the machining reference plane and the measuring reference plane with high precision are the same, the data detected by a machine tool and the data error measured by a three-coordinate measuring machine can be reduced, and necessary conditions are created for ensuring that the coaxiality, the parallelism and the verticality form and position tolerance among the vertical plane of the frame, the horizontal plane of the frame, the transverse hole of the frame, the longitudinal hole of the frame and the bottom plane of the frame reach 4-level precision.
Drawings
Figure 1-base plane unit exploded view;
FIG. 2 is a top view of the reference plane unit and a sectional view A-A and a sectional view B-B of the top view;
FIG. 3-a top view of the reference plane unit changing the connection position and a sectional view A-A and a sectional view B-B of the top view;
FIG. 4-top view of the datum plane unit after the fixture support table assembly;
FIG. 5-section A-A of FIG. 4 and enlarged detail B of section A-A;
FIG. 6-top view of the datum plane unit after assembly of the T-shaped worktop;
FIG. 7-section A-A of FIG. 6 and enlarged detail B of section A-A;
FIG. 8 is a perspective view of the frame in a position for placement on the T-table combined reference plane unit;
FIG. 9 is a perspective view showing the position of the frame on the jig support table unit;
FIG. 10-a cross-sectional view of the fixture support table mounted on the adjustable back iron for machining the tooling holes.
The reference numerals are as follows
1-lower support plate, 2-M12 socket head cap screw, 3-copper sheet combination, 4-copper sheet combination, 5-copper sheet combination, 6-copper sheet combination, 7-upper support plate, 8-M8 socket head cap screw washer group, 9-clamp body support table, 10-T type worktable, 11-T type nut, 12-frame, 13-M27 bolt, 14-adjustable sizing block, 1.1-M8 internal thread, 1.2-M12 countersunk head through hole, 1.3-lower surface, 7.1-M8 countersunk head through hole, 7.2-countersunk head blind hole, 7.3-measuring point, 7.4-measuring point, 7.5-measuring point, 7-6-measuring point, 7.7-M27 internal thread, 7.8-upper surface, 9.1-M12 internal thread, 9.2-upper surface of clamp body support table 9, 10.1-T-shaped groove, 10.2-T-shaped worktable upper surface, 12.1-rack longitudinal plane, 12.2-rack transverse plane, 12.3-rack transverse hole, 12.4-rack longitudinal hole, 12.5-rack bottom plane, one-datum plane unit, two-datum plane unit, three-datum plane unit, four-datum plane unit, five-datum plane unit, six-datum plane unit, seven-datum plane unit, eight-datum plane unit, a 1-measuring point, a 2-measuring point, a 3-measuring point, a 4-measuring point, b 1-measuring point, b 2-measuring point, b 3-measuring point, b 4-measuring point, c 1-measuring point, c 2-measuring point, c 3-measuring point, c 4-measuring point, d 1-measuring point, d 2-measurement point, d 3-measurement point, d 4-measurement point, e 1-measurement point, e 2-measurement point, e 3-measurement point, e 4-measurement point, f 1-measurement point, f 2-measurement point, f 3-measurement point, f 4-measurement point, g 1-measurement point, g 2-measurement point, g 3-measurement point, g 4-measurement point, h 1-measurement point, h 2-measurement point, h 3-measurement point, h 4-measurement point.
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 9, the installation reference plane for precision machining and measurement of the reciprocating pump frame of the present embodiment includes a lower support plate 1, an M12 socket head cap screw washer set 2, a copper sheet set 3, a copper sheet set 4, a copper sheet set 5, a copper sheet set 6, an upper support plate 7, an M8 socket head cap screw 8, a fixture support table 9, a T-shaped table 10, a T-shaped nut 11, a frame 12, an M27 bolt 13, an adjustable pad iron 14, an M8 internal thread 1.1, an M12 countersunk head through hole 1.2, a lower surface 1.3, an M8 countersunk head through hole 7.1, a countersunk blind hole 7.2, a measurement point 7.3, a measurement point 7.4, a measurement point 7.5, a measurement point 7-6, an M27 internal thread 7.7, an upper surface 7.8, an M12 internal thread 9.1, an upper surface 9.2, a T10.1, an upper surface of the fixture support table, a T-shaped table 10.2, a vertical plane 12.1, a frame plane 12.12, a frame plane 12.2, a horizontal plane 12.12.5, a frame plane 12.2, a frame bottom hole 12.5, a frame plane 12.2, a bottom plane 12.2, a frame plane, a frame hole, a frame plane, a T-shaped hole, reference plane unit i, reference plane unit ii, reference plane unit iii, reference plane unit iv, reference plane unit five, reference plane unit six, reference plane unit seven, reference plane unit eight, measurement point a1, measurement point a2, measurement point a3, measurement point a4, measurement point b4, measurement point c4, measurement point d4, measurement point e4, measurement point f4, measurement point g4, measurement point h4, and measurement point b 4.
The utility model provides an installation reference plane of reciprocating pump frame precision finishing and measurement comprises 8 reference plane units, and every reference plane unit comprises bottom suspension fagging 1, M12 hexagon socket head cap screw packing ring group 2, copper sheet combination 3, copper sheet combination 4, copper sheet combination 5, copper sheet combination 6, goes up backup pad 7, M8 hexagon socket head cap screw 8.
Referring to fig. 1 and 2, the copper sheet combination 3, the copper sheet combination 4, the copper sheet combination 5 and the copper sheet combination 6 of each datum plane unit are installed between the lower support plate 1 and the upper support plate 7, and placed at four right angles of the lower support plate 1 and the upper support plate 7, and are respectively screwed into the M8 internal thread 1.1 of the lower support plate 1 by M8 hexagon socket head cap screws 8 penetrating through the M8 countersunk head through holes 7.1 of the upper support plate 7 and penetrating through the concave grooves of the copper sheet combination 3, the copper sheet combination 4, the copper sheet combination 5 and the copper sheet combination 6, so as to connect the lower support plate 1 and the upper support plate 7 together. Go up the gradient of the upper surface 7.8 of backup pad 7 and the lower surface 1.3 of bottom suspension fagging 1 and can adjust through the different thickness of copper sheet combination 3, copper sheet combination 4, copper sheet combination 5, copper sheet combination 6, the thickness of copper sheet combination 3, copper sheet combination 4, copper sheet combination 5, copper sheet combination 6, 4 combinations is confirmed as required, and the thickness of combination can be: 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10mm.
Referring to fig. 2, the reference plane unit has 4 measuring points, which are respectively measuring point 7.3, measuring point 7.4, measuring point 7.5, and measuring point 7-6, the measuring points are located above the corresponding copper sheet combination, and the measuring value of the measuring point can well reflect the thickness variation of the combined copper sheet at the position 3mm from the edge of the M8 countersunk head through hole 7.
Referring to fig. 4 and 5, the datum plane unit is mounted on the upper surface 9.2 of the fixture body support platform, and 2M 12 socket head cap screw washer sets 2 are threaded through M12 countersunk through holes 1.2 of the lower support plate 1 and screwed into M12 internal threads 9.1 of the fixture body support platform 9, so that the lower support plate 1 is connected with the fixture body support platform 9.
Referring to fig. 6 and 7, the datum plane unit is mounted on the upper surface 10.2 of the T-shaped worktable, 2M 12 socket head cap screw washer sets 2 pass through the M12 countersunk head through hole 1.2 of the lower support plate 1, are screwed into the T-shaped nut 11 of the T-shaped groove 10.1 of the T-shaped worktable 10, and are screwed, so that the lower support plate 1 is connected with the T-shaped worktable 1.
Referring to fig. 5 and 7, the positions of the blind countersunk holes 7.2 of the upper support plate 7, the internal threads 7.7 of M27, and the through countersunk hole 1.2 of M12 of the lower support plate 1 of the reference plane unit can be changed, that is, the two dimensions of the upper support plate 7 and the lower support plate 1 are changed, and the other parts are not changed, and the change only satisfies the position difference of the T-shaped groove, and does not affect the function of the reference plane unit.
The method for establishing, adjusting and using the mounting reference plane for the precision machining and measurement of the reciprocating pump frame is divided into the following conditions:
secondly, a method for establishing a measuring and mounting reference plane on a T-shaped workbench 10 of a three-coordinate measuring machine comprises the following steps:
referring to fig. 6 and 7, a measuring and mounting reference plane on a T-shaped worktable 10 of a three-coordinate measuring machine is composed of a first reference plane unit, a second reference plane unit, a third reference plane unit, a fourth reference plane unit, a fifth reference plane unit, a sixth reference plane unit, a seventh reference plane unit and an eighth reference plane unit which are placed on an upper surface 10.2 of the T-shaped worktable, and a method for adjusting the flatness of the 8 reference plane units in a large plane to be within 0.015mm includes:
firstly, respectively enabling 2M 12 socket head cap screw gasket groups 2 of each datum plane unit to penetrate through M12 countersunk head through holes 1.2 of a lower support plate 1, screwing the washer groups into T-shaped nuts 11 of T-shaped grooves 10.1 of a T-shaped workbench 10, and screwing the washer groups tightly, so that the lower support plate 1 is connected with the T-shaped workbench 1;
the lower supporting plate 1 and the upper supporting plate 7 are connected together by 4M 8 socket head cap screws 8, and it is noted that when the lower supporting plate 1 and the upper supporting plate 7 are connected for the first time, the copper sheet combination 3, the copper sheet combination 4, the copper sheet combination 5 and the copper sheet combination 6 are not added between the lower supporting plate 1 and the upper supporting plate 7;
measuring three coordinate values of 32 measurement points in total by three coordinates, wherein the 32 measurement points are a measurement point a, a measurement point b, a measurement point c, a measurement point d, a measurement point e, a measurement point f, a measurement point g, a measurement point h, analyzing the coordinate values of the 32 points, assuming that the Z coordinate value represents a value in the height direction, finding out the Z coordinate value, calculating the difference value between the Z coordinate value of each measurement point and the highest Z coordinate value, and detaching the hexagon screw 8 in 4M connecting the lower support plate 1 and the upper support plate 7 together, adding a copper sheet combination between the lower supporting plate 1 and the upper supporting plate 7, wherein the thickness value of the copper sheet combination is the difference value between the measured Z coordinate value and the highest Z coordinate value of the measuring point, and connecting the lower supporting plate 1 and the upper supporting plate 7 together again by using 4M 8 hexagon socket head cap screws 8;
fourthly, the Z coordinate values of the 32 measuring points are measured again, if the Z coordinate difference of the 32 measuring points is within 0.015mm, the Z coordinate values are qualified, and if the Z coordinate difference of the 32 measuring points is not reached, the Z coordinate difference of the 32 measuring points can meet the standard that the Z coordinate difference of the 32 measuring points is within 0.015mm by performing the measurement again according to the third method.
Secondly, establishing a processing and mounting reference plane of the frame on the upper surface 9.2 of the support platform of the fixture body:
referring to fig. 4 and 5, after the fixture supporting table 9 is placed on the measurement reference plane established by three coordinates, the installation reference plane established on the upper surface 9.2 of the fixture supporting table for machining the rack also consists of a first reference plane unit, a second reference plane unit, a third reference plane unit, a fourth reference plane unit, a fifth reference plane unit, a sixth reference plane unit, a seventh reference plane unit and an eighth reference plane unit, and the flatness requirement of the 8 reference plane units in one large plane is adjusted to be within 0.015mm according to the following method:
firstly, respectively enabling 2M 12 socket head cap screw gasket groups 2 of each datum plane unit to penetrate through M12 countersunk through holes 1.2 of a lower support plate 1, screwing the washer groups into M12 internal threads 9.1 of a fixture body support platform 9, screwing the washer groups, and connecting the lower support plate 1 with the fixture body support platform 9;
the second, third and fourth step adjusting methods are completely the same as the second, third and fourth step adjusting methods for establishing a measuring and mounting reference plane on the T-shaped workbench 10 of the three-coordinate measuring machine, and the final adjusting data are recorded.
Referring to fig. 10, after the frame processing and mounting reference plane established on the upper surface 9.2 of the support platform of the fixture body is adjusted to be qualified by the three-coordinate measuring machine, the support platform 9 of the fixture body is mounted on the adjustable sizing block 14 of the cement foundation of the workshop, the frame processing and mounting reference plane established on the upper surface 9.2 of the support platform of the fixture body is leveled by the leveling ruler, the processing and mounting reference plane is used for the first time, the transverse hole 12.3 of the frame or the longitudinal hole 12.4 of the frame is processed, the frame after processing is detected in advance by three-coordinate detection, if the parallelism between the axis of the transverse hole 12.3 of the frame or the longitudinal hole 12.4 of the frame and the bottom plane 12.5 of the frame is detected to have a difference value with the ideal mounting reference plane, the thicknesses of the copper sheet combination 3, the copper sheet combination 4, the copper sheet combination 5 and the copper sheet combination 6 corresponding to the reference plane unit can be adjusted according to the difference value to make up the adjustment error of the frame processing and mounting reference plane established on the upper surface 9.2 of the support platform of the leveling fixture body by the leveling ruler, the requirements of parallelism between the axes of the transverse hole 12.3 and the longitudinal hole 12.4 of the high-precision frame and the bottom plane 12.5 of the frame can be met.
Thirdly, establishing a frame processing and mounting reference plane on the T-shaped worktable 10 of the large-scale numerical control machine tool:
the method of establishing the frame processing installation reference plane on the T-shaped table 10 of the large numerical control machine is substantially the same as the method of establishing the measurement installation reference plane on the T-shaped table 10 of the three-coordinate measuring machine, and there is only one difference that X, Y, Z three coordinate values of 32 measurement points measured when the frame processing installation reference plane is established on the T-shaped table 10 of the large numerical control machine are data measured by the numerical control machine itself.
After a frame machining and mounting reference plane is established on a T-shaped worktable 10 of the large-scale numerical control machine tool and is adjusted to be qualified, the frame is arranged on an installation reference plane, the longitudinal plane 12.1 of the frame or the transverse plane 12.2 of the frame is processed for the first time, the processed frame is measured and detected by three coordinates, the verticality of the longitudinal plane 12.1 or the transverse plane 12.2 of the frame and the bottom plane 12.5 of the frame is detected, if the perpendicularity between the detected rack longitudinal plane 12.1 or rack transverse plane 12.2 and the rack bottom plane 12.5 has a difference value with an ideal installation reference plane, the thicknesses of the copper sheet combination 3, the copper sheet combination 4, the copper sheet combination 5 and the copper sheet combination 6 corresponding to the reference plane unit can be adjusted according to the numerical value of the difference value for correction, the error between the processing horizontal plane and the processing vertical plane of the numerical control machine tool is made up, and the perpendicularity requirement between the high-precision rack longitudinal plane 12.1 or rack transverse plane 12.2 and the rack bottom plane 12.5 can be met.
Referring to fig. 2, the M27 internal thread 7.7 and the M27 bolt 13 of the upper support plate 7 function as: firstly, when the copper sheet combination thickness of the reference plane unit is adjusted, the upper supporting plate 7 is detached and installed for use; and secondly, when the rack is arranged on the reference plane, the rack is tightly pressed for use.
Please refer to fig. 9, which is a perspective view of the frame to be mounted on the upper surface 9.2 of the supporting platform of the fixture body for precision machining.
Please refer to fig. 8, which is a perspective view of a frame that needs to be directly mounted on the upper surface 10.2 of the T-shaped worktable of the machine tool for precision machining.
The installation reference plane for precision machining and measurement of the reciprocating pump frame is adopted, the height difference of the reference plane is controlled within 0.015mm, according to the national standard GB/T1184, the plane size is within 2500 mm-4000 mm, the height difference can be controlled within 0.015mm, the precision belongs to 3-level high precision, the machining reference plane and the measurement reference plane with high precision are the same, the errors of data detected by a machine tool and data measured by a three-coordinate measuring machine can be reduced, and necessary conditions are created for ensuring that the form and position tolerances of the vertical plane 12.1 of the frame, the horizontal plane 12.2 of the frame, the horizontal hole 12.3 of the frame, the longitudinal hole 12.4 of the frame, the bottom plane 12.5 of the frame, the coaxiality, the parallelism and the verticality among the vertical plane and the vertical plane reach 4-level precision.
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. An installation reference plane for precision machining and measurement of a reciprocating pump frame is characterized by comprising a lower supporting plate (1), an M12 inner hexagon screw washer group (2), a copper sheet combination (3), a copper sheet combination (4), a copper sheet combination (5), a copper sheet combination (6), an upper supporting plate (7), an M8 inner hexagon screw (8), a clamp body supporting table (9), a T-shaped worktable (10), a T-shaped nut (11), a frame (12), an M27 bolt (13), an M8 internal thread (1.1), an M12 countersunk head through hole (1.2), a lower surface (1.3), an M8 countersunk head through hole (7.1), a countersunk blind hole (7.2), a measuring point (7.3), a measuring point (7.4), a measuring point (7.5), a measuring point (7-6), an M27 internal thread (7.7), an upper surface (7.8), an M12 internal thread (9.1), an upper surface (9.2) of the clamp body, a T-shaped groove (10.1), the device comprises a T-shaped workbench upper surface (10.2), a rack longitudinal plane (12.1), a rack transverse plane (12.2), a rack transverse hole (12.3), a rack longitudinal hole (12.4) and a rack bottom plane (12.5);
the copper sheet combination (3), the copper sheet combination (4), the copper sheet combination (5) and the copper sheet combination (6) are arranged between the lower supporting plate (1) and the upper supporting plate (7), and placed at four right angles of the lower supporting plate (1) and the upper supporting plate (7), M8 hexagon socket head screws (8) are respectively used for penetrating through M8 countersunk head through holes (7.1) of the upper supporting plate (7), penetrating through concave grooves of the copper sheet combination (3), the copper sheet combination (4), the copper sheet combination (5) and the copper sheet combination (6), screwing in M8 internal threads (1.1) of the lower supporting plate (1), and connecting the lower supporting plate (1) and the upper supporting plate (7) together;
the inclination of the upper surface (7.8) of the upper supporting plate (7) and the inclination of the lower surface (1.3) of the lower supporting plate (1) can be adjusted through different thicknesses of the copper sheet combination (3), the copper sheet combination (4), the copper sheet combination (5) and the copper sheet combination (6).
2. An installation reference plane for precision machining and measurement of reciprocating pump frames according to claim 1, characterized by that, the thickness of the copper sheet combination (3), copper sheet combination (4), copper sheet combination (5) and copper sheet combination (6) is determined according to the need, the thickness of the combination can be: 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10mm.
3. An installation reference plane for precision machining and measurement of a reciprocating pump frame as claimed in claim 1, wherein the reference plane unit has 4 measuring points, namely a measuring point (7.3), a measuring point (7.4), a measuring point (7.5) and a measuring point (7-6), the measuring points are positioned above the corresponding copper sheet combination, and the measuring value of the measuring points can well reflect the thickness change of the combined copper sheet at the position 3mm away from the edge of the M8 countersunk through hole (7).
4. An installation reference plane for precision machining and measurement of reciprocating pump machine frame according to claim 1, characterized in that 2M 12 socket head cap screw washer sets (2) are passed through M12 countersunk through hole (1.2) of lower support plate (1), screwed into M12 internal thread (9.1) of clamp body support table (9) or T-shaped nut (11), and screwed, and lower support plate (1) is connected with clamp body support table (9) or T-shaped worktable (10).
5. A reciprocating pump machine frame precision machining and measuring installation reference plane according to claim 1, characterized in that when the T-table (10) of the three-coordinate measuring machine establishes the measuring installation reference plane, X, Y, Z coordinate values for each measuring point are measured by the three-coordinate measuring machine itself.
6. A mounting reference plane for precision machining and measurement of a reciprocating pump machine frame according to claim 1, wherein X, Y, Z coordinate values for each measurement point are measured by the numerical control machine itself when the machine frame machining mounting reference plane is established on the T-table (10) of the large numerical control machine.
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| CN202111609159.XA CN114029756A (en) | 2021-12-27 | 2021-12-27 | Mounting reference plane for precision machining and measurement of reciprocating pump frame |
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| CN202111609159.XA CN114029756A (en) | 2021-12-27 | 2021-12-27 | Mounting reference plane for precision machining and measurement of reciprocating pump frame |
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