CN102672441B - Light rail intermediate shaft machining process - Google Patents
Light rail intermediate shaft machining process Download PDFInfo
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- CN102672441B CN102672441B CN201210132930.3A CN201210132930A CN102672441B CN 102672441 B CN102672441 B CN 102672441B CN 201210132930 A CN201210132930 A CN 201210132930A CN 102672441 B CN102672441 B CN 102672441B
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Abstract
The invention discloses a light rail intermediate shaft machining process which comprises blank making, normalizing, semifinishing, quenching, finish machining and final inspection. The blank making comprises blank manufacturing and shaft blank rough machining. The semifinishing comprises semi-finish turning, milling a middle section key groove and tooth molding. The finish machining comprises finish turning, milling a flat square, drilling a screw hole, turning threads, grinding a center hole, grinding an external circle, grinding teeth, rough milling an electric spark shaft end key groove. By means of the light rail intermediate shaft machining process, a machining key groove is roughly milled after gear grinding, end products are manufactured through the electric spark shaft end key groove, the key groove size and shape and position accuracy can meet requirements, and requirements for light rail high power output are met.
Description
Technical field
The present invention relates to a kind of gear shaft processing technology, relate in particular to a kind of light rail jackshaft processing technology.
Background technology
Light rail jackshaft is the vitals of light rail power train, for the transmission of dynamical system outputting power, axle is provided with the keyway for positioning transmission tooth, but light rail is different from common rail train, conventionally design speed per hour is higher, dynamical system output torque is larger, so jackshaft institute torque suspension is also larger, higher to jackshaft quality requirement, especially the keyway for positioning transmission tooth of jackshaft, General Requirements width of keyway reaches 18mm, tolerance 0.027, symmetry 0.2 and roughness and reaches Ra3.2, and traditional Milling Process does not reach requirement.
Therefore, need a kind of light rail jackshaft processing technology, to manufacture the light rail jackshaft conforming to quality requirements, meet the needs of the high power output of light rail.
Summary of the invention
In view of this, the object of this invention is to provide a kind of light rail jackshaft processing technology, in order to manufacture the light rail jackshaft conforming to quality requirements, meet the needs of the high power output of light rail.
Light rail jackshaft processing technology of the present invention, comprises base, normalizing, semifinishing, quenching, fine finishining and inspection eventually, it is characterized in that: described base comprises blank making and shaft blank roughing; Described semifinishing comprises half finish turning, milling stage casing keyway and profile of tooth moulding; Described fine finishining comprises finish turning, the flat side of milling, bore and attack screw, cutting thread, grinding center hole, cylindrical grinding, roll flute, rough mill and electric spark axle head keyway;
Specifically comprise the following steps:
A. base:
A1. blank is made, and adopts the mode of forging or cast to make blank;
A2. shaft blank roughing, turning machining shaft end face, axle cylindrical, pillow block terrace, outside circle and increment face, axial end is reserved 8～12mm allowance, all the other reserved 3～5mm allowance, integral surface roughness reaches Ra6.3;
B. normalizing: be between 920～950 ℃, to keep 2～3 hours by tooth base heating-up temperature, then cooling rapidly;
C. semifinishing:
C1. half finish turning, turning axial end, axle cylindrical, tooth cylindrical and pillow block terrace, each step surface place processing escape, axial end is reserved 5～8mm allowance, axle cylindrical is reserved 0.5～0.8mm allowance, all the other reserved 0.3～0.5mm allowance, and integral surface roughness reaches Ra3.2;
C2. milling stage casing keyway, is positioned at tuno-miller processing stage casing, axle middle part keyway;
C3. profile of tooth moulding, upper rolling tooth machine gear hobbing processing tooth portion, tooth-face roughness reaches Ra3.2;
D. quench: integral quenching is temper again;
E. fine finishining:
E1. finish turning, axial end allowance centering are removed in first turning, and then each step surface place allowance is removed in turning, the then reserved 0.2～0.4mm allowance of turning machining shaft cylindrical, the reface axle first end conical surface;
E2. the flat side of milling, is positioned at the flat side of axle first end step surface place's milling, and flat side's milling is to step surface place but must not injure step surface;
E3. bore and attack screw, be positioned at axle the second end face boring tapping;
E4. cutting thread, is positioned at the cutted thread of axle first end;
E5. grinding center hole, grinding shaft both ends of the surface centre bore to roughness reaches Ra0.4;
E6. cylindrical grinding, grinding is removed axle Excircle machining surplus to surface roughness and is reached Ra0.8, grinding is removed outside circle allowance and is reached Ra1.6 to surface roughness, and the grinding axle first end conical surface reaches Ra0.4 to surface roughness, and grinding pillow block terrace to surface roughness reaches Ra1.6;
E7. roll flute, the grinding flank of tooth to surface roughness reaches Ra0.8;
E8. rough mill, be positioned at axle first end conical surface Milling Process axle head keyway, 0.3～0.5mm allowance is reserved in axle head keyway both sides, and surface roughness reaches Ra6.3;
E9. electric spark axle head keyway, upper EDM shaping machine processing axle head keyway is removed its both sides allowance, and surface roughness reaches Ra3.2;
F. inspection eventually, detects overall dimension and fills in size detection report, has detected rear product warehousing.
Further, in described step a, blank making adopts the mode of forging to make blank; After shaft blank roughing, shaft blank is carried out to ultrasonic examination detection, detection method is to be coated with machine oil on shaft blank surface, then with supersonic reflectoscope, shaft blank is carried out to scanning, and Scanning speed is less than 150mm/s.
Further, in described step c, after profile of tooth moulding, flank is carried out to chamfer machining.
Further, in described step e, after roll flute, carry out stress shot blasting and magnetic powder inspection and detect, when stress shot blasting, tooth portion is carried out to strong stress shot blasting, other position conservation treatments; Magnetic powder inspection detects dry, the video picture, observation and the reinspection post processing that comprise prerinse, apply bleeding agent, remove unnecessary bleeding agent, part.
The invention has the beneficial effects as follows: light rail jackshaft processing technology of the present invention, after roll flute, first rough milling axle head keyway, is then machined to finished product with electric discharge machine, and axle head keyway size and the accuracy of form and position can reach requirement, meet the needs of the high power output of light rail.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is light rail intermediate shaft structure schematic diagram.
The specific embodiment
Fig. 1 is light rail intermediate shaft structure schematic diagram, and the light rail jackshaft processing technology of the present embodiment comprises base, normalizing, semifinishing, quenching, fine finishining and inspection eventually, it is characterized in that: described base comprises blank making and shaft blank roughing; Described semifinishing comprises half finish turning, milling stage casing keyway and profile of tooth moulding; Described fine finishining comprises finish turning, the flat side of milling, bore and attack screw, cutting thread, grinding center hole, cylindrical grinding, roll flute, rough mill and electric spark axle head keyway;
Specifically comprise the following steps:
A. base:
A1. blank is made, and adopts the mode of forging or cast to make blank;
A2. shaft blank roughing, turning machining shaft end face, axle cylindrical, pillow block terrace, outside circle and increment face, axial end is reserved 8～12mm allowance, all the other reserved 3～5mm allowance, integral surface roughness reaches Ra6.3;
B. normalizing: be between 920～950 ℃, to keep 2～3 hours by tooth base heating-up temperature, then cooling rapidly;
C. semifinishing:
C1. half finish turning, turning axial end, axle cylindrical, tooth cylindrical and pillow block terrace, each step surface place processing escape, axial end is reserved 5～8mm allowance, axle cylindrical is reserved 0.5～0.8mm allowance, all the other reserved 0.3～0.5mm allowance, and integral surface roughness reaches Ra3.2;
C2. milling stage casing keyway 3, is positioned at tuno-miller processing stage casing, axle middle part keyway 3;
C3. profile of tooth moulding, upper rolling tooth machine gear hobbing processing tooth portion 5, tooth-face roughness reaches Ra3.2;
D. quench: integral quenching is temper again;
E. fine finishining:
E1. finish turning, axial end allowance centering are removed in first turning, and then each step surface place allowance is removed in turning, the then reserved 0.2～0.4mm allowance of turning machining shaft cylindrical, the reface axle first end conical surface 6;
E2. the flat side of milling, is positioned at the flat side 7 of axle first end 1 step surface place milling, and flat side's 7 millings are to step surface place but must not injure step surface;
E3. bore and attack screw, be positioned at 2 borings of axle the second end tapping;
E4. cutting thread, is positioned at 1 cutted thread of axle first end;
E5. grinding center hole, grinding shaft both ends of the surface centre bore to roughness reaches Ra0.4;
E6. cylindrical grinding, grinding is removed axle Excircle machining surplus to surface roughness and is reached Ra0.8, grinding is removed outside circle allowance and is reached Ra1.6 to surface roughness, and the grinding axle first end conical surface 6 reaches Ra0.4 to surface roughness, and grinding pillow block terrace to surface roughness reaches Ra1.6;
E7. roll flute, the grinding flank of tooth to surface roughness reaches Ra0.8;
E8. rough mill, be positioned at the axle first end conical surface 6 Milling Process axle head keyways 4,0.3～0.5mm allowance is reserved in axle head keyway 4 both sides, and surface roughness reaches Ra6.3;
E9. electric spark axle head keyway 4, upper EDM shaping machine processing axle head keyway 4 is removed its both sides allowance, and surface roughness reaches Ra3.2;
F. inspection eventually, detects overall dimension and fills in size detection report, has detected rear product warehousing;
In the present embodiment, in described step a, blank is made and is adopted the mode of forging to make blank compared with casting, and forge piece has better mechanical performance; After shaft blank roughing, shaft blank is carried out to ultrasonic examination detection, detection method is to be coated with machine oil on shaft blank surface, then with supersonic reflectoscope, shaft blank is carried out to scanning, and Scanning speed is less than 150mm/s, can guarantee blank quality, avoids internal structural flaw.
In the present embodiment, in described step c, after profile of tooth moulding, flank is carried out to chamfer machining, the burr producing to remove gear hobbing machining, guarantees tooth-shape structure.
In the present embodiment, in described step e, after roll flute, carry out stress shot blasting and magnetic powder inspection and detect, when stress shot blasting, tooth portion 5 is carried out to strong stress shot blasting, other position conservation treatments; Magnetic powder inspection detects dry, the video picture, observation and the reinspection post processing that comprise prerinse, apply bleeding agent, remove unnecessary bleeding agent, part.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (4)
1. a light rail jackshaft processing technology, is characterized in that: comprise base, normalizing, semifinishing, quenching, fine finishining and inspection eventually, described base comprises blank making and shaft blank roughing; Described semifinishing comprises half finish turning, milling stage casing keyway and profile of tooth moulding; Described fine finishining comprises finish turning, the flat side of milling, bore and attack screw, cutting thread, grinding center hole, cylindrical grinding, roll flute, rough mill and electric spark axle head keyway;
Specifically comprise the following steps:
A. base:
A1. blank is made, and adopts the mode of forging or cast to make blank;
A2. shaft blank roughing, turning machining shaft end face, axle cylindrical, pillow block terrace, outside circle and increment face, axial end is reserved 8～12mm allowance, all the other reserved 3～5mm allowance, integral surface roughness reaches Ra6.3;
B. normalizing: be between 920～950 ℃, to keep 2～3 hours by tooth base heating-up temperature, then cooling rapidly;
C. semifinishing:
C1. half finish turning, turning axial end, axle cylindrical, tooth cylindrical and pillow block terrace, each step surface place processing escape, axial end is reserved 5～8mm allowance, axle cylindrical is reserved 0.5～0.8mm allowance, all the other reserved 0.3～0.5mm allowance, and integral surface roughness reaches Ra3.2;
C2. milling stage casing keyway, is positioned at tuno-miller processing stage casing, axle middle part keyway;
C3. profile of tooth moulding, upper rolling tooth machine gear hobbing processing tooth portion, tooth-face roughness reaches Ra3.2;
D. quench: integral quenching is temper again;
E. fine finishining:
E1. finish turning, axial end allowance centering are removed in first turning, and then each step surface place allowance is removed in turning, the then reserved 0.2～0.4mm allowance of turning machining shaft cylindrical, the reface axle first end conical surface;
E2. the flat side of milling, is positioned at the flat side of axle first end step surface place's milling, and flat side's milling is to step surface place but must not injure step surface;
E3. bore and attack screw, be positioned at axle the second end face boring tapping;
E4. cutting thread, is positioned at the cutted thread of axle first end;
E5. grinding center hole, grinding shaft both ends of the surface centre bore to roughness reaches Ra0.4;
E6. cylindrical grinding, grinding is removed axle Excircle machining surplus to surface roughness and is reached Ra0.8, grinding is removed outside circle allowance and is reached Ra1.6 to surface roughness, and the grinding axle first end conical surface reaches Ra0.4 to surface roughness, and grinding pillow block terrace to surface roughness reaches Ra1.6;
E7. roll flute, the grinding flank of tooth to surface roughness reaches Ra0.8;
E8. rough mill, be positioned at axle first end conical surface Milling Process axle head keyway, 0.3～0.5mm allowance is reserved in axle head keyway both sides, and surface roughness reaches Ra6.3;
E9. electric spark axle head keyway, upper EDM shaping machine processing axle head keyway is removed its both sides allowance, and surface roughness reaches Ra3.2;
F. inspection eventually, detects overall dimension and fills in size detection report, has detected rear product warehousing.
2. light rail jackshaft processing technology according to claim 1, is characterized in that: in described step a, blank is made and adopted the mode of forging to make blank; After shaft blank roughing, shaft blank is carried out to ultrasonic examination detection, detection method is to be coated with machine oil on shaft blank surface, then with supersonic reflectoscope, shaft blank is carried out to scanning, and Scanning speed is less than 150mm/s.
3. light rail jackshaft processing technology according to claim 1, is characterized in that: in described step c, after profile of tooth moulding, flank is carried out to chamfer machining.
4. light rail jackshaft processing technology according to claim 1, is characterized in that: in described step e, carry out stress shot blasting and magnetic powder inspection and detect after roll flute, when stress shot blasting, tooth portion is carried out to strong stress shot blasting, other position conservation treatments; Magnetic powder inspection detects dry, the video picture, observation and the reinspection post processing that comprise prerinse, apply bleeding agent, remove unnecessary bleeding agent, part.
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| CN201210132930.3A CN102672441B (en) | 2012-04-28 | 2012-04-28 | Light rail intermediate shaft machining process |
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