CN106624664B - A kind of finish forge formula heavy caliber Venturi tube processing technology - Google Patents
A kind of finish forge formula heavy caliber Venturi tube processing technology Download PDFInfo
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- CN106624664B CN106624664B CN201710098590.XA CN201710098590A CN106624664B CN 106624664 B CN106624664 B CN 106624664B CN 201710098590 A CN201710098590 A CN 201710098590A CN 106624664 B CN106624664 B CN 106624664B
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- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
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Abstract
The invention discloses a kind of finish forge formula heavy caliber Venturi tube processing technologys, which is characterized in that the processing of venturi socket section main body includes the following steps：The assembling positioning endoporus semifinishing finishing of internal diameter inner bore honing outer circle finishing both ends end face of flange processing finishing both ends machining flange hole detection pressure hole machined detection of hole machined window flange is pried through in main body forging detection outer circle roughing end face processing endoporus roughing；Wherein, in end face processing and finishing of internal diameter, there are surplus, surplus 0.5mm.It takes whole forging to finish, takes new process, new technology, new equipment and new material, forging uses ESR ingot, enhances the density of material, improve machining accuracy；The roughness of Venturi tube endoporus is enable to reach Ra0.2 or so, overall uncertainty can reach ± 0.118%-± 0.125%.Good processing accuracy, process operation are convenient, and production efficiency is high.
Description
Technical field
The present invention relates to technical field of nuclear power, and in particular to a kind of finish forge formula heavy caliber Venturi tube processing technology.
Background technology
DN500mm nuclear power factory owner's water supply Venturi tube components, belong to non-core grade equipment, 4 groups of pressures are arranged in its main body
Mouthful, every group of pressure tappings are shared by a bottom range and a high range differential pressure transmitter, to obtain the survey of accurate feedwater flow
Amount, the component are made of upstream straight pipe, venturi pipeline section and downstream straight pipe.
The machining accuracy of existing Venturi tube is overall uncertainty 7%, and the pressure that can be born is little, service life
It is short；And process operation bothers, process is more, low production efficiency.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide a kind of good processing accuracy, process operation side
Just, the high finish forge formula heavy caliber Venturi tube processing technology of production efficiency.
To achieve the above object, the present invention provides following technical solutions：A kind of finish forge formula heavy caliber Venturi tube processing
Technique, the processing of venturi socket section main body include the following steps：
(1) the outer circle center of correction main body blank, with centre drill feather plucking base both ends end-face central hole；
(2) centre bore of main body both ends end face is withstood with Specialized tail stock, rough turn forging blank entirety outer circle to φ 980mm,
Roughness Ra 6.3；
(3) straight pipe flange excircle is pressed from both sides, centre frame in branch, disc outside school, flat diffuser end face of flange, roughness Ra 3.2,
Boring endoporus is to φ 200mm；
(4) u-turn folder diffuser flange excircle, centre frame in branch, disc, flat segments end face of flange, overall length are outside school
1840mm；
(5) centre bore of main body both ends end face is withstood with Specialized tail stock, each periphery φ 855mm of half smart car workpiece main body,
φ 508mm, φ 960mm, φ 580mm, φ 508mm, φ 855mm, wherein φ 508mm outside diameters and both ends flange excircle at two
Diameter must made allowance 2mm, roughness Ra 3.2；
(6) press from both sides straight pipe outer circle, the upper centre frame of branch outer circle φ 508mm at, calibration outer circle, flat diffuser end face of flange and
Platform grade respectively stays 2mm surpluses at the outer round platform grade thickness 7mm of flange thickness 115mm and φ 584.2mm；U-turn folder diffuser outer circle,
The upper centre frame of branch, calibrates outer circle, flat segments end face of flange and platform grade, flange thickness at outer circle φ 508mm at straight pipe
The outer round platform grade thickness 7mm of 115mm and φ 584.2mm respectively stay 2mm surpluses, main body overall length 1833mm；
(7) by Workpiece placing tool, 65 ° of peep-hole flange faces, the milling peep-hole flange on outer circle φ 960mm are corrected
Face；φ 153mm peep-holes are bored, it is cut with scissors with reamer, ensures its dimensional tolerance and roughness Ra 1.6；
(8) scribing line bores, attacks 12 × M30-6H screw holes on peep-hole flange face, hole depth 60mm, screw thread effective depth 50mm；
(9) by peep-hole blind flange and φ 153mm clearance fit therewith, there are the surpluses of 0.05mm to be coordinated for the two,
Assembly is integrated, and manufactures 2 φ 16mm taper pins, with 12 M30 × 120mm hexagon-headed bolts by peep-hole blind flange and venturi
Main body connects；
(10) straight pipe flange excircle is pressed from both sides, is propped up at diffuser outer circle φ 508mm and goes up centre frame, outside corrected for dispersion section flange
Circle and end face, rough turn diffuser and throat so that throat dimension φ 280mm, diffuser big end size are φ 423.6mm and the two
Between arc section connection, coarse Ra1.6；
(11) u-turn folder diffuser flange excircle corrects straight tube in the upper centre frame of branch at straight pipe outer circle φ 508mm
Section flange excircle, rough turn straight pipe and contraction section so that straight pipe inner hole outer circularity is φ 423.6mm, contraction section and therebetween
Circular sliding slopes section, roughness Ra 1.6；
(12) lathe is thoroughly cleaned, mixed liquor is prepared；
(13) diffuser flange excircle is pressed from both sides, the upper centre frame of branch, corrects outside straight pipe flange at straight pipe outer circle φ 508mm
Circle, flat segments end face of flange change and squeeze knife processing, straight pipe and contraction section and the two circular sliding slopes are repeatedly extruded with extruding knife
At the circular sliding slopes of place and throat；
(14) oilstone tooling is changed, special oilstone is installed, adjusts the contact surface of oilstone and diffuser endoporus, repeatedly honing
At straight pipe and contraction section and the two circular sliding slopes and at the circular sliding slopes of throat, its roughness is detected with roughmeter, makes it
Roughness is parity with or superiority over Ra0.4；
(15) u-turn folder straight pipe flange excircle, in the upper centre frame of branch, corrected for dispersion at diffuser outer circle φ 508mm
Section flange excircle, flat diffuser end face of flange change and squeeze knife processing, and repeatedly extruding diffuser, throat and the two with extruding knife justifies
Arc junction；
(16) oilstone tooling is changed, special oilstone is installed, adjusts the contact surface of oilstone and diffuser endoporus, repeatedly honing
At diffuser and throat and the two circular sliding slopes, its roughness is detected with roughmeter, its roughness is made to be parity with or superiority over
Ra0.4；
(17) lathe is thoroughly cleaned, coolant liquid is changed,
(18) diffuser flange excircle is pressed from both sides, in the upper centre frame of branch at straight pipe outer circle φ 508mm, corrects straight pipe method
Blue outer circle, and smart car straight pipe, contraction section and R593.725 and R1046.5 circular arcs, flat segments flange and platform grade end face, until straight
Pipeline section inlet size φ 431.8 (0-0.10) mm ensures that R593.725 and R1046.5 circular arcs are justified respectively at straight pipe and contraction section
It slips over and crosses, contraction section and throat's rounding off, roughness Ra 1.6,
(19) straight pipe flange excircle is pressed from both sides, is propped up at diffuser outer circle φ 508mm and goes up centre frame, outside corrected for dispersion section flange
It is round, at smart car diffuser and throat and the two circular sliding slopes, flat diffuser flange and platform grade end face, until diffuser inlet size φ
431.8 (0-0.10) mm, throat dimension are φ 288.7 (0-0.1) mm, ensure R1443.5 circular arcs in the round and smooth mistake of throat's straightway
It crosses, roughness Ra 1.6；
(20) lathe is thoroughly cleaned, mixed liquor is prepared；
(21) straight pipe flange excircle is pressed from both sides, is propped up at diffuser outer circle φ 508mm and goes up centre frame, outside corrected for dispersion section flange
Circle, flat diffuser end face of flange change and squeeze knife processing, diffuser and throat and the two circular sliding slopes are repeatedly extruded with extruding knife
Place；
(22) oilstone tooling is changed, oilstone is installed, adjusts the contact surface of oilstone and diffuser endoporus, honing repeatedly is spread
At section and throat and the two circular sliding slopes, its roughness is detected with roughmeter, its roughness is made to be parity with or superiority over Ra0.4；
(23) u-turn folder diffuser flange excircle corrects straight tube in the upper centre frame of branch at straight pipe outer circle φ 508mm
Section flange excircle, flat segments end face of flange change and squeeze knife processing, and straight pipe, contraction section, the two circle are repeatedly extruded with extruding knife
At arc junction and the short circular sliding slopes with throat of contraction；
(24) oilstone tooling is changed, oilstone is installed, adjusts the contact surface of oilstone and straight pipe endoporus, anti-honing straight pipe
With at contraction section and the two circular sliding slopes and at contraction section and the circular sliding slopes of throat, it is coarse to detect its with roughmeter
Degree, makes its roughness be parity with or superiority over Ra0.4；
(25) in φ 960mm and φ 580mm outer circles pressure port is bored with φ 9.8mm drill bits；
(26) φ 23mm drill bits are used to expand 4 × φ 23mm, depth 120mm, roughness Ra 3.2；
(27) φ 10mm reamer articulation 4 × φ 10mm pressure ports, roughness Ra 0.8 are used；
(28) endoporus of two end flange face of main body, each periphery φ 855mm of smart car workpiece main body, φ are withstood with special tooling
508mm, φ 960mm, φ 580mm, φ 508mm, φ 855mm, roughness Ra 3.2.
Preferably, entire procedure of processing is：Main body forging-detection-outer circle roughing-end face processing-endoporus slightly adds
Work-pries through hole machined-peep-hole flange assembling positioning-endoporus semifinishing-finishing of internal diameter-inner bore honing-outer circle finishing-
Both ends end face of flange processes finishing-both ends machining flange hole-detection-pressure hole machined-detection；
Wherein, in end face processing and finishing of internal diameter, there are surplus, surplus 0.5mm.
Upstream straight pipe：Material is ASTM A-335GR P-11,18 times of the length of venturi socket section internal diameter, on
Trip straight pipe procedure of processing be：Blanking-steel pipe both ends finished edge-flange and steel-pipe welding-endoporus overall processing-endoporus top gem of a girdle-pendant
Mill-both ends flange excircle and end face process finishing-both ends machining flange hole-detection；Wherein endoporus overall processing made allowance
0.5mm。
Downstream straight pipe：Material is ASTM A-335GR P-11,3.5 times of the length of venturi socket section internal diameter, under
Trip straight pipe procedure of processing be：Blanking-steel pipe both ends finished edge-flange and steel-pipe welding-endoporus overall processing-endoporus top gem of a girdle-pendant
Mill-end flange outer circle and end face process finishing-end flange hole machined-by crossover flange and downstream straight pipe welding-inspection
It surveys；Wherein endoporus overall processing made allowance 0.5mm.
It is an advantage of the invention that：Compared with prior art, the present invention takes whole forging to finish, take new process,
New technology, new equipment and new material, forging use ESR ingot, enhance the density of material, improve machining accuracy；So that literary mound
In the roughness of pipe orifice can reach Ra0.2 or so, overall uncertainty can reach ± 0.118%-± 0.125%.Add
Work precision is good, process operation is convenient, and production efficiency is high.
The invention will be further described with specific embodiment with reference to the accompanying drawings of the specification.
Description of the drawings
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of venturi socket section main body of the embodiment of the present invention.
Specific implementation mode
Referring to Fig. 1 and Fig. 2, a kind of finish forge formula heavy caliber Venturi tube processing technology disclosed by the invention, venturi socket
Section main body processing includes the following steps：
(1) the outer circle center of correction main body blank, with centre drill feather plucking base both ends end-face central hole；
(2) centre bore of main body both ends end face is withstood with Specialized tail stock, rough turn forging blank entirety outer circle to φ 980mm,
Roughness Ra 6.3；
(3) straight pipe flange excircle is pressed from both sides, centre frame in branch, disc outside school, flat diffuser end face of flange, roughness Ra 3.2,
Boring endoporus is to φ 200mm；
(4) u-turn folder diffuser flange excircle, centre frame in branch, disc, flat segments end face of flange, overall length are outside school
1840mm；
(5) centre bore of main body both ends end face is withstood with Specialized tail stock, each periphery φ 855mm of half smart car workpiece main body,
φ 508mm, φ 960mm, φ 580mm, φ 508mm, φ 855mm, wherein φ 508mm outside diameters and both ends flange excircle at two
Diameter must made allowance 2mm, roughness Ra 3.2；
(6) press from both sides straight pipe outer circle, the upper centre frame of branch outer circle φ 508mm at, calibration outer circle, flat diffuser end face of flange and
Platform grade respectively stays 2mm surpluses at the outer round platform grade thickness 7mm of flange thickness 115mm and φ 584.2mm；U-turn folder diffuser outer circle,
The upper centre frame of branch, calibrates outer circle, flat segments end face of flange and platform grade, flange thickness at outer circle φ 508mm at straight pipe
The outer round platform grade thickness 7mm of 115mm and φ 584.2mm respectively stay 2mm surpluses, main body overall length 1833mm；
(7) by Workpiece placing tool, 65 ° of peep-hole flange faces, the milling peep-hole flange on outer circle φ 960mm are corrected
Face；φ 153mm peep-holes are bored, it is cut with scissors with reamer, ensures its dimensional tolerance and roughness Ra 1.6；
(8) scribing line bores, attacks 12 × M30-6H screw holes on peep-hole flange face, hole depth 60mm, screw thread effective depth 50mm；
(9) by peep-hole blind flange and φ 153mm clearance fit therewith, there are the surpluses of 0.05mm to be coordinated for the two,
Assembly is integrated, and manufactures 2 φ 16mm taper pins, with 12 M30 × 120mm hexagon-headed bolts by peep-hole blind flange and venturi
Main body connects；
(10) straight pipe flange excircle is pressed from both sides, is propped up at diffuser outer circle φ 508mm and goes up centre frame, outside corrected for dispersion section flange
Circle and end face, rough turn diffuser and throat so that throat dimension φ 280mm, diffuser big end size are φ 423.6mm and the two
Between arc section connection, coarse Ra1.6；
(11) u-turn folder diffuser flange excircle corrects straight tube in the upper centre frame of branch at straight pipe outer circle φ 508mm
Section flange excircle, rough turn straight pipe and contraction section so that straight pipe inner hole outer circularity is φ 423.6mm, contraction section and therebetween
Circular sliding slopes section, roughness Ra 1.6；
(12) lathe is thoroughly cleaned, mixed liquor is prepared；
(13) diffuser flange excircle is pressed from both sides, the upper centre frame of branch, corrects outside straight pipe flange at straight pipe outer circle φ 508mm
Circle, flat segments end face of flange change and squeeze knife processing, straight pipe and contraction section and the two circular sliding slopes are repeatedly extruded with extruding knife
At the circular sliding slopes of place and throat；
(14) oilstone tooling is changed, special oilstone is installed, adjusts the contact surface of oilstone and diffuser endoporus, repeatedly honing
At straight pipe and contraction section and the two circular sliding slopes and at the circular sliding slopes of throat, its roughness is detected with roughmeter, makes it
Roughness is parity with or superiority over Ra0.4；
(15) u-turn folder straight pipe flange excircle, in the upper centre frame of branch, corrected for dispersion at diffuser outer circle φ 508mm
Section flange excircle, flat diffuser end face of flange change and squeeze knife processing, and repeatedly extruding diffuser, throat and the two with extruding knife justifies
Arc junction；
(16) oilstone tooling is changed, special oilstone is installed, adjusts the contact surface of oilstone and diffuser endoporus, repeatedly honing
At diffuser and throat and the two circular sliding slopes, its roughness is detected with roughmeter, its roughness is made to be parity with or superiority over
Ra0.4；
(17) lathe is thoroughly cleaned, coolant liquid is changed,
(18) diffuser flange excircle is pressed from both sides, in the upper centre frame of branch at straight pipe outer circle φ 508mm, corrects straight pipe method
Blue outer circle, and smart car straight pipe, contraction section and R593.725 and R1046.5 circular arcs, flat segments flange and platform grade end face, until straight
Pipeline section inlet size φ 431.8 (0-0.10) mm ensures that R593.725 and R1046.5 circular arcs are justified respectively at straight pipe and contraction section
It slips over and crosses, contraction section and throat's rounding off, roughness Ra, 1.6,
(19) straight pipe flange excircle is pressed from both sides, is propped up at diffuser outer circle φ 508mm and goes up centre frame, outside corrected for dispersion section flange
It is round, at smart car diffuser and throat and the two circular sliding slopes, flat diffuser flange and platform grade end face, until diffuser inlet size φ
431.8 (0-0.10) mm, throat dimension are φ 288.7 (0-0.1) mm, ensure R1443.5 circular arcs in the round and smooth mistake of throat's straightway
It crosses, roughness Ra 1.6；
(20) lathe is thoroughly cleaned, mixed liquor is prepared；
(21) straight pipe flange excircle is pressed from both sides, is propped up at diffuser outer circle φ 508mm and goes up centre frame, outside corrected for dispersion section flange
Circle, flat diffuser end face of flange change and squeeze knife processing, diffuser and throat and the two circular sliding slopes are repeatedly extruded with extruding knife
Place；
(22) oilstone tooling is changed, oilstone is installed, adjusts the contact surface of oilstone and diffuser endoporus, honing repeatedly is spread
At section and throat and the two circular sliding slopes, its roughness is detected with roughmeter, its roughness is made to be parity with or superiority over Ra0.4；
(23) u-turn folder diffuser flange excircle corrects straight tube in the upper centre frame of branch at straight pipe outer circle φ 508mm
Section flange excircle, flat segments end face of flange change and squeeze knife processing, and straight pipe, contraction section, the two circle are repeatedly extruded with extruding knife
At arc junction and the short circular sliding slopes with throat of contraction；
(24) oilstone tooling is changed, oilstone is installed, adjusts the contact surface of oilstone and straight pipe endoporus, anti-honing straight pipe
With at contraction section and the two circular sliding slopes and at contraction section and the circular sliding slopes of throat, it is coarse to detect its with roughmeter
Degree, makes its roughness be parity with or superiority over Ra0.4；
(25) in φ 960mm and φ 580mm outer circles pressure port is bored with φ 9.8mm drill bits；
(26) φ 23mm drill bits are used to expand 4 × φ 23mm, depth 120mm, roughness Ra 3.2；
(27) φ 10mm reamer articulation 4 × φ 10mm pressure ports, roughness Ra 0.8 are used；
(28) endoporus of two end flange face of main body, each periphery φ 855mm of smart car workpiece main body, φ are withstood with special tooling
508mm, φ 960mm, φ 580mm, φ 508mm, φ 855mm, roughness Ra 3.2.
Preferably, entire procedure of processing is：Main body forging-detection-outer circle roughing-end face processing-endoporus slightly adds
Work-pries through hole machined-peep-hole flange assembling positioning-endoporus semifinishing-finishing of internal diameter-inner bore honing-outer circle finishing-
Both ends end face of flange processes finishing-both ends machining flange hole-detection-pressure hole machined-detection；
Wherein, in end face processing and finishing of internal diameter, there are surplus, surplus 0.5mm.
Upstream straight pipe：Material is ASTM A-335GR P-11,18 times of the length of venturi socket section internal diameter, on
Trip straight pipe procedure of processing be：Blanking-steel pipe both ends finished edge-flange and steel-pipe welding-endoporus overall processing-endoporus top gem of a girdle-pendant
Mill-both ends flange excircle and end face process finishing-both ends machining flange hole-detection；Wherein endoporus overall processing made allowance
0.5mm。
Downstream straight pipe：Material is ASTM A-335GR P-11,3.5 times of the length of venturi socket section internal diameter, under
Trip straight pipe procedure of processing be：Blanking-steel pipe both ends finished edge-flange and steel-pipe welding-endoporus overall processing-endoporus top gem of a girdle-pendant
Mill-end flange outer circle and end face process finishing-end flange hole machined-by crossover flange and downstream straight pipe welding-inspection
It surveys；Wherein endoporus overall processing made allowance 0.5mm.
Flow conditioner plate：316 stainless steel forgings of material；
Procedure of processing：Forging blank → both ends of the surface and Excircle machining → processing endoporus (made allowance) → linear cutter 32
32 holes of endoporus → honing → handle welding → detection.
The present invention takes whole forging to finish, and takes new process, new technology, new equipment and new material, and forging uses
ESR ingot enhances the density of material, improves machining accuracy；The roughness of Venturi tube endoporus is enable to reach Ra0.2
Left and right, overall uncertainty can reach ± 0.118%-± 0.125%.Good processing accuracy, process operation are convenient, production effect
Rate is high.
Above-described embodiment is served only for that invention is further explained to the specific descriptions of the present invention, should not be understood as
Limiting the scope of the present invention, it is non-that the technician of this field according to the content of foregoing invention makes some to the present invention
The modifications and adaptations of essence are each fallen within protection scope of the present invention.
Claims (3)
1. a kind of finish forge formula heavy caliber Venturi tube processing technology, which is characterized in that venturi socket section main body processing include with
Lower step：
(1) the outer circle center of correction main body blank, with centre drill feather plucking base both ends end-face central hole；
(2) centre bore of main body both ends end face is withstood with Specialized tail stock, rough turn forging blank entirety outer circle is coarse to φ 980mm
Spend Ra6.3；
(3) straight pipe flange excircle is pressed from both sides, centre frame in branch, disc outside school, flat diffuser end face of flange, roughness Ra 3.2, in boring
Hole is to φ 200mm；
(4) u-turn folder diffuser flange excircle, centre frame in branch, disc, flat segments end face of flange, overall length are outside school
1840mm；
(5) centre bore of main body both ends end face, each periphery φ 855mm of half smart car workpiece main body, φ are withstood with Specialized tail stock
508mm, φ 960mm, φ 580mm, φ 508mm, φ 855mm, wherein φ 508mm outside diameters and both ends flange excircle are straight at two
Diameter must made allowance 2mm, roughness Ra 3.2；
(6) straight pipe outer circle is pressed from both sides, the upper centre frame of branch, calibrates outer circle, flat diffuser end face of flange and platform at outer circle φ 508mm
Grade, respectively stay 2mm surpluses at the outer round platform grade thickness 7mm of flange thickness 115mm and φ 584.2mm；U-turn folder diffuser outer circle, straight
The upper centre frame of branch, calibrates outer circle, flat segments end face of flange and platform grade, flange thickness 115mm at outer circle φ 508mm at pipeline section
And the outer round platform grade thickness 7mm of φ 584.2mm respectively stay 2mm surpluses, main body overall length 1833mm；
(7) by Workpiece placing tool, 65 ° of peep-hole flange faces, the milling peep-hole flange face on outer circle φ 960mm are corrected；
φ 153mm peep-holes are bored, it is cut with scissors with reamer, ensures its dimensional tolerance and roughness Ra 1.6；
(8) scribing line bores, attacks 12 × M30-6H screw holes on peep-hole flange face, hole depth 60mm, screw thread effective depth 50mm；
(9) by peep-hole blind flange and φ 153mm clearance fit therewith, there are the surpluses of 0.05mm to be coordinated for the two, assembly
It is integrated, manufactures 2 φ 16mm taper pins, with 12 M30 × 120mm hexagon-headed bolts by peep-hole blind flange and venturi main body
Connection；
(10) press from both sides straight pipe flange excircle, diffuser outer circle φ 508mm at branch go up centre frame, corrected for dispersion section flange excircle and
End face, rough turn diffuser and throat so that throat dimension φ 280mm, diffuser big end size are for φ 423.6mm and therebetween
Arc section connection, coarse Ra1.6；
(11) u-turn folder diffuser flange excircle corrects straight pipe method in the upper centre frame of branch at straight pipe outer circle φ 508mm
Blue outer circle, rough turn straight pipe and contraction section so that straight pipe inner hole outer circularity is φ 423.6mm, contraction section and circle between the two
Arc linkage section, roughness Ra 1.6；
(12) lathe is thoroughly cleaned, mixed liquor is prepared；
(13) diffuser flange excircle is pressed from both sides, the upper centre frame of branch, corrects straight pipe flange excircle at straight pipe outer circle φ 508mm,
Flat segments end face of flange changes and squeezes knife processing, repeatedly extruded at straight pipe and contraction section and the two circular sliding slopes with extruding knife
At the circular sliding slopes of throat；
(14) oilstone tooling is changed, special oilstone is installed, adjusts the contact surface of oilstone and diffuser endoporus, repeatedly honing straight tube
At section and contraction section and the two circular sliding slopes and at the circular sliding slopes of throat, its roughness is detected with roughmeter, keeps its coarse
Degree is parity with or superiority over Ra0.4；
(15) u-turn folder straight pipe flange excircle, in the upper centre frame of branch, corrected for dispersion section method at diffuser outer circle φ 508mm
Blue outer circle, flat diffuser end face of flange change and squeeze knife processing, and repeatedly extruding diffuser, throat and the two circular arc with extruding knife connects
Meet place；
(16) oilstone tooling is changed, special oilstone is installed, adjusts the contact surface of oilstone and diffuser endoporus, honing repeatedly is spread
At section and throat and the two circular sliding slopes, its roughness is detected with roughmeter, its roughness is made to be parity with or superiority over Ra0.4；
(17) lathe is thoroughly cleaned, coolant liquid is changed,
(18) diffuser flange excircle is pressed from both sides, in the upper centre frame of branch at straight pipe outer circle φ 508mm, is corrected outside straight pipe flange
Circle, and smart car straight pipe, contraction section and R593.725 and R1046.5 circular arcs, flat segments flange and platform grade end face, until straight pipe
Inlet size φ 431.8 (0-0.10) mm ensures R593.725 and R1046.5 circular arcs respectively at straight pipe and the round and smooth mistake of contraction section
It crosses, contraction section and throat's rounding off, roughness Ra 1.6,
(19) straight pipe flange excircle is pressed from both sides, the upper centre frame of branch at diffuser outer circle φ 508mm, corrected for dispersion section flange excircle,
At smart car diffuser and throat and the two circular sliding slopes, flat diffuser flange and platform grade end face, until diffuser inlet size φ
431.8 (0-0.10) mm, throat dimension are φ 288.7 (0-0.1) mm, ensure R1443.5 circular arcs in the round and smooth mistake of throat's straightway
It crosses, roughness Ra 1.6；
(20) lathe is thoroughly cleaned, mixed liquor is prepared；
(21) straight pipe flange excircle is pressed from both sides, the upper centre frame of branch at diffuser outer circle φ 508mm, corrected for dispersion section flange excircle,
Flat diffuser end face of flange changes and squeezes knife processing, repeatedly extruded at diffuser and throat and the two circular sliding slopes with extruding knife；
(22) change oilstone tooling, install oilstone, adjust the contact surface of oilstone and diffuser endoporus, repeatedly honing diffuser and
At throat and the two circular sliding slopes, its roughness is detected with roughmeter, its roughness is made to be parity with or superiority over Ra0.4；
(23) u-turn folder diffuser flange excircle corrects straight pipe method in the upper centre frame of branch at straight pipe outer circle φ 508mm
Blue outer circle, flat segments end face of flange change and squeeze knife processing, and repeatedly extruding straight pipe, contraction section, the two circular arc with extruding knife connects
It meets place and shrinks at the short circular sliding slopes with throat；
(24) oilstone tooling is changed, oilstone is installed, adjusts the contact surface of oilstone and straight pipe endoporus, anti-honing straight pipe and receipts
At contracting section and the two circular sliding slopes and at contraction section and the circular sliding slopes of throat, its roughness is detected with roughmeter, is made
Its roughness is parity with or superiority over Ra0.4；
(25) in φ 960mm and φ 580mm outer circles pressure port is bored with φ 9.8mm drill bits；
(26) φ 23mm drill bits are used to expand 4 × φ 23mm, depth 120mm, roughness Ra 3.2；
(27) φ 10mm reamer articulation 4 × φ 10mm pressure ports, roughness Ra 0.8 are used；
(28) endoporus of two end flange face of main body, each periphery φ 855mm of smart car workpiece main body, φ are withstood with special tooling
508mm, φ 960mm, φ 580mm, φ 508mm, φ 855mm, roughness Ra 3.2.
2. a kind of finish forge formula heavy caliber Venturi tube processing technology according to claim 1, it is characterised in that：Upstream straight tube
Section：Material is ASTM A-335 GR P-11, and 18 times of the length of venturi socket section internal diameter, the processing of upstream straight pipe walks
Suddenly it is：Blanking-steel pipe both ends finished edge-flange and steel-pipe welding-endoporus overall processing-inner bore honing-both ends flange excircle
And end face processes finishing-both ends machining flange hole-detection；Wherein endoporus overall processing made allowance 0.5mm.
3. a kind of finish forge formula heavy caliber Venturi tube processing technology according to claim 2, it is characterised in that：Downstream straight tube
Section：Material is ASTM A-335 GR P-11,3.5 times of the length of venturi socket section internal diameter, the processing of downstream straight pipe
Step is：Outside blanking-steel pipe both ends finished edge-flange and steel-pipe welding-endoporus overall processing-inner bore honing-end flange
Circle and end face process finishing-end flange hole machined-by crossover flange and downstream straight pipe welding-detection；Wherein endoporus is whole
Body processes made allowance 0.5mm.
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