CN102979884A - Mine vehicle axle wheel reductor planetary gear and manufacture method thereof - Google Patents
Mine vehicle axle wheel reductor planetary gear and manufacture method thereof Download PDFInfo
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- CN102979884A CN102979884A CN2012104841967A CN201210484196A CN102979884A CN 102979884 A CN102979884 A CN 102979884A CN 2012104841967 A CN2012104841967 A CN 2012104841967A CN 201210484196 A CN201210484196 A CN 201210484196A CN 102979884 A CN102979884 A CN 102979884A
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Abstract
The invention relates to a mine vehicle axle wheel reductor planetary gear and a manufacture method thereof. The manufacture method comprises the following processing steps of: (1) forging to obtain a gear ring; (2) roughly turning; (3) carrying out preheat treatment; (4) finely turning; (5) carrying out ultrasonic flaw detection; (6) hobbing; (7) boring a plurality of oilholes in the wall of a planet wheel inner hole in the middle of the gear ring along the radial direction of the planet wheel inner hole; (8) carburizing for heat treatment; (9) performing plain grinding on two end faces of the gear ring to the required size and then grinding the planet wheel inner hole of the gear ring to the required size; (10) grinding the gear; (11) carrying out magnetic powder inspection; (12) strengthening shot peening at gear root; and (13) carrying out manganese phosphating. The planetary gear produced by adopting the manufacture method, disclosed by the invention has the advantages that the contact fatigue strength is better, the reliability is greatly enhanced and the service life is greatly prolonged; and according to the manufacture method provided by the invention, shot peening strengthening is adopted in processing the gear root, and the stress state of the gear root is changed, so that the gear root bending strength of the planetary gear is remarkably enhanced, the strength of the planetary gear is enhanced and the service life of the planetary gear is prolonged.
Description
Technical field
The present invention relates to a kind of planetary pinion, especially a kind of mine car sedan-chair wheel reductor planetary pinion and manufacture method thereof.
Background technique
The planetary reliability of mine car sedan-chair wheel side speed reducer is directly connected to the reliability of car load.Because the road environment that vehicle runs in the process of moving is ever-changing, when especially vehicle travels on the road surface of injustice, the additional dynamic load that Vehicular vibration produces and road surface projection make the stressed very complicated of ransaxle to the impact of collision that vehicle causes, and working environment is extremely abominable.Existing planetary pinion is in the requirement that is difficult to satisfy the mine car wheel side speed reducer aspect processing technology and working life and the reliability.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of mine car sedan-chair wheel reductor planetary pinion and manufacture method thereof are provided, this manufacture method can make planetary pinion have better contact fatigue strength, greatly improves planetary pinion reliability and life-span.
According to technological scheme provided by the invention, described mine car sedan-chair wheel reductor planetary pinion comprises gear ring, and the center of gear ring is provided with the planet wheel endoporus, at the outer surface of gear ring tooth section is set; It is characterized in that: the circumferencial direction along hole wall in the middle part of the hole wall of described planet wheel endoporus arranges circlip groove, two sections endoporus about circlip groove is divided into the planet wheel endoporus.
Hole wall at the planet wheel endoporus of described circlip groove both sides arranges a plurality of star-wheel internal orifice dimensions that follow to the oilhole that arranges.
Described oilhole is communicated with the tooth root of gear ring external teeth section.
Described planetary modulus is 5.08mm, and the number of teeth is 33, and the gear width is 101.5mm.
The planetary manufacture method of mine car sedan-chair wheel reductor of the present invention is characterized in that, comprises following process step:
(1) forge: employing hardenability is that the 20MnCr5 alloy material forging of H5 obtains gear ring;
(2) rough turn: gear ring is carried out rough turnly on lathe, gear ring cylindrical, end face and planet wheel endoporus keep 2 ~ 3mm machining allowance;
(3) conditioning heat treatment: with the high temperature normalizing 4.5 ~ 5.5 hours under 940 ~ 950 ℃ of conditions of the gear ring after rough turn, again 620 ~ 630 ℃ of temper 3.5 ~ 4.5 hours;
(4) finish turning: on lathe gear ring is carried out finish turning, along the circumferencial direction car bumper ring recess of hole wall, the both ends of the surface of gear ring keep the machining allowance of 0.3 ~ 0.4mm on the hole wall of the planet wheel endoporus in the middle of gear ring;
(5) ultrasonic flaw detection: with ultrasonic examination gear ring inside zero defect is arranged, non-destructive testing standard is secondary;
(6) gear hobbing: the tooth section to the gear ring outer surface on gear hobbing machine carries out roughing, and gear common normal keeps the machining allowance of 0.25 ~ 0.35mm;
(7) boring: along a plurality of oilholes of radially brill of planet wheel endoporus, oilhole is by the tooth root of tooth section on the planet wheel endoporus hole wall at gear ring middle part;
(8) carburizing heat treatment: the gear ring after will holing carries out Carburization Treatment at 920 ~ 960 ℃, and the time is 6.8 ~ 7.2 hours, and carbon potential is 0.85 ~ 0.95%; Then be cooled to 850 ~ 870 ℃, logical nitrogen is incubated 10 ~ 30 minutes in the temperature-fall period, is 1.5 ~ 2 hours from logical nitrogen to the cumulative time that insulation finishes; Quench in 850 ~ 870 ℃ after the arrangement of insulation knot;
(9) both ends of the surface of gear ring are carried out plain grinding to required size, the planet wheel endoporus with gear ring is milled to required size again;
(10) roll flute: gear ring is fixed on the gear grinding machine, and section is ground to required size to tooth;
(11) magnetic particle flaw detection: on magnetic particle flaw detector, tooth section is carried out magnetic particle testing, check whether tooth section has Grinding cracks and burn;
(12) tooth root reinforced peening: the tooth root to tooth section carries out shot blast, and the pill of employing is the alloy cast shot, and shot peening strength is 0.5 ~ 0.7 arc-height, surface coverage〉200%, surperficial residual pressure power〉60KSI;
(13) wear resistance: planetary pinion at 70 ~ 100 ℃ of lower 10 ~ 20min that process, is formed the iron Manganese Phosphate membrane on planetary surface, and the iron Manganese Phosphate membrane is heavy〉7.5g/m
2
The present invention has the following advantages: (1) manufacture method of the present invention adopts first carburizing, the method for nitriding again, not only makes planetary pinion obtain enough dark effective case depth, also makes planetary pinion surface formation nitride tissue simultaneously; This manufacture method is compared with common carburizing heat treatment process, and the planetary pinion that obtains has better contact fatigue strength, has greatly improved planetary reliability and life-span; (2) manufacture method of the present invention adopts strengthened shot peening to process to tooth root, changes the root stress state, has significantly improved planetary teeth bending strength, improves the strength of gear teeth and life-span; (3) manufacture method of the present invention is carried out surperficial wear resistance to gear, is conducive to further improve the gear surface contact condition; The coating tissue of simultaneously surface formation at Meshing Process of Spur Gear, plays well lubrication, also is conducive to the formation of contact surface oil film, improves gear pair break-in characteristic, improves gear pair wearability and antiscuffing capacity.
Description of drawings
Fig. 1 is planetary structural representation of the present invention.
Fig. 2 is the surface state figure of planetary pinion of the present invention behind wear resistance.
Embodiment
The invention will be further described below in conjunction with concrete accompanying drawing.
As shown in Figure 1: described mine car sedan-chair wheel reductor planetary pinion comprises gear ring 1, planet wheel endoporus 2, tooth section 3, circlip groove 4, oilhole 5 etc.
As shown in Figure 1, mine car sedan-chair wheel reductor planetary pinion of the present invention comprises gear ring 1, and the center of gear ring 1 is provided with planet wheel endoporus 2, at the outer surface of gear ring 1 tooth section 3 is set, the effect of tooth section 3 main starting forces transmission; Circumferencial direction along hole wall in the middle part of the hole wall of described planet wheel endoporus 2 arranges circlip groove 4, two sections endoporus about circlip groove 4 is divided into planet wheel endoporus 2, two sections endoporus are respectively applied to assemble full-complement cylinder roller bearing, gear ring 1 directly serves as the outer ring of bearing, and full-complement cylinder roller bearing rolls in planet wheel endoporus 2; Be used in the described circlip groove 4 back-up ring is set, back-up ring separates the full-complement cylinder roller bearing of both sides, and such planetary gear construction is compacter, and institute takes up space less, and the full-complement cylinder roller bearing bearing capacity is better;
Described planetary modulus is 5.08mm, and the number of teeth is 33, and the gear width is 101.5mm;
As shown in Figure 1, at the hole wall of the planet wheel endoporus 2 of described circlip groove 4 both sides a plurality of oilholes 5 that star-wheel endoporus 2 radially arranges that follow are set, oilhole 5 is communicated with the tooth root of gear ring 1 external teeth section 3; Lubricant oil can fully enter in the planet wheel endoporus 2 like this, and lubricated and cooling full-complement cylinder roller bearing and planet wheel endoporus 2 improve working environment; The planetary pinion of stating of the present invention has high reliability, long-life advantage.
Embodiment one: the planetary manufacture method of a kind of mine car sedan-chair wheel reductor comprises following process step:
(1) forge: employing hardenability is that the 20MnCr5 alloy material forging of H5 obtains gear ring 1, to guarantee high-quality tooth base, forges and adopts heating by electric cooker, strictly controls initial forging temperature and final forging temperature;
(2) rough turn: gear ring 1 is carried out rough turnly on lathe, gear ring 1 cylindrical, end face and planet wheel endoporus 2 keep the 2mm machining allowance;
(3) conditioning heat treatment: with the high temperature normalizing 5.5 hours under 940 ℃ of conditions of the gear ring 1 after rough turn, again 620 ℃ of temper 4.5 hours, to obtain the grain structure of refinement;
(4) finish turning: on lathe gear ring 1 is carried out finish turning, along the circumferencial direction car bumper ring recess 4 of hole wall, the both ends of the surface of gear ring 1 keep the machining allowance of 0.3mm on the hole wall of the planet wheel endoporus 2 in the middle of the gear ring 1;
(5) ultrasonic flaw detection: with ultrasonic examination gear ring 1 inside zero defect is arranged, non-destructive testing standard is secondary;
(6) gear hobbing: the tooth section 3 to gear ring 1 outer surface on gear hobbing machine carries out roughing, and gear common normal keeps the machining allowance of 0.25mm;
(7) boring: along a plurality of oilholes 5 of the radially brill of planet wheel endoporus 2, oilhole 5 passes through the tooth root of tooth section 3, thereby makes planet wheel endoporus 2 surfaces that better lubrication and cooling be arranged in the course of the work on planet wheel endoporus 2 hole walls at gear ring 1 middle part;
(8) carburizing heat treatment: the gear ring 1 after will holing carries out Carburization Treatment at 920 ℃, and the time is 7.2 hours, and carbon potential is 0.85%; Then be cooled to 850 ℃, logical nitrogen is incubated 30 minutes in the temperature-fall period, is 1.5 hours from logical nitrogen to the cumulative time that insulation finishes; Quench in 850 ℃ after the arrangement of insulation knot;
(9) both ends of the surface of gear ring 1 are carried out plain grinding to required size, the planet wheel endoporus 2 with gear ring 1 is milled to required size again, centering end face when mill planet wheel endoporus 2, and pitch circle is beated＜0.01mm;
(10) roll flute: gear ring 1 is fixed on the gear grinding machine, take the both ends of the surface of gear ring 1 as benchmark, tooth section 3 is ground to required size;
(11) magnetic particle flaw detection: on magnetic particle flaw detector, tooth section 3 is carried out magnetic particle testing, check whether tooth section 3 has Grinding cracks and burn;
(12) tooth root reinforced peening: the tooth root to tooth section 3 carries out shot blast, and the pill of employing is alloy cast shot S230, and shot peening strength is 0.5 arc-height, surface coverage〉200%, surperficial residual pressure power〉60KSI;
(13) wear resistance: planetary pinion at 70 ℃ of lower 20min that process, is formed the iron Manganese Phosphate membrane on planetary surface, and the iron Manganese Phosphate membrane is heavy〉7.5g/m
2Planetary surface state behind wear resistance as shown in Figure 2.
Embodiment two: the planetary manufacture method of a kind of mine car sedan-chair wheel reductor comprises following process step:
(1) forge: employing hardenability is that the 20MnCr5 alloy material forging of H5 obtains gear ring 1, to guarantee high-quality tooth base, forges and adopts heating by electric cooker, strictly controls initial forging temperature and final forging temperature;
(2) rough turn: gear ring 1 is carried out rough turnly on lathe, gear ring 1 cylindrical, end face and planet wheel endoporus 2 keep the 3mm machining allowance;
(3) conditioning heat treatment: with the high temperature normalizing 5.5 hours under 950 ℃ of conditions of the gear ring 1 after rough turn, again 630 ℃ of temper 3.5 hours, to obtain the grain structure of refinement;
(4) finish turning: on lathe gear ring 1 is carried out finish turning, along the circumferencial direction car bumper ring recess 4 of hole wall, the both ends of the surface of gear ring 1 keep the machining allowance of 0.4mm on the hole wall of the planet wheel endoporus 2 in the middle of the gear ring 1;
(5) ultrasonic flaw detection: with ultrasonic examination gear ring 1 inside zero defect is arranged, non-destructive testing standard is secondary;
(6) gear hobbing: the tooth section 3 to gear ring 1 outer surface on gear hobbing machine carries out roughing, and gear common normal keeps the machining allowance of 0.35mm;
(7) boring: along a plurality of oilholes 5 of the radially brill of planet wheel endoporus 2, oilhole 5 passes through the tooth root of tooth section 3, thereby makes planet wheel endoporus 2 surfaces that better lubrication and cooling be arranged in the course of the work on planet wheel endoporus 2 hole walls at gear ring 1 middle part;
(8) carburizing heat treatment: the gear ring 1 after will holing carries out Carburization Treatment at 960 ℃, and the time is 6.8 hours, and carbon potential is 0.95%; Then be cooled to 870 ℃, logical nitrogen is incubated 10 minutes in the temperature-fall period, is 2 hours from logical nitrogen to the cumulative time that insulation finishes; Quench in 870 ℃ after the arrangement of insulation knot;
(9) both ends of the surface of gear ring 1 are carried out plain grinding to required size, the planet wheel endoporus 2 with gear ring 1 is milled to required size again, centering end face when mill planet wheel endoporus 2, and pitch circle is beated＜0.01mm;
(10) roll flute: gear ring 1 is fixed on the gear grinding machine, take the both ends of the surface of gear ring 1 as benchmark, tooth section 3 is ground to required size;
(11) magnetic particle flaw detection: on magnetic particle flaw detector, tooth section 3 is carried out magnetic particle testing, check whether tooth section 3 has Grinding cracks and burn;
(12) tooth root reinforced peening: the tooth root to tooth section 3 carries out shot blast, and the pill of employing is alloy cast shot S230, and shot peening strength is 0.7 arc-height, surface coverage〉200%, surperficial residual pressure power〉60KSI;
(13) wear resistance: planetary pinion at 100 ℃ of lower 10min that process, is formed the iron Manganese Phosphate membrane on planetary surface, and the iron Manganese Phosphate membrane is heavy〉7.5g/m
2Planetary surface state behind wear resistance as shown in Figure 2.
Embodiment three: the planetary manufacture method of a kind of mine car sedan-chair wheel reductor comprises following process step:
(1) forge: employing hardenability is that the 20MnCr5 alloy material forging of H5 obtains gear ring 1, to guarantee high-quality tooth base, forges and adopts heating by electric cooker, strictly controls initial forging temperature and final forging temperature;
(2) rough turn: gear ring 1 is carried out rough turnly on lathe, gear ring 1 cylindrical, end face and planet wheel endoporus 2 keep the 2.5mm machining allowance;
(3) conditioning heat treatment: with the high temperature normalizing 5 hours under 945 ℃ of conditions of the gear ring 1 after rough turn, again 625 ℃ of temper 4 hours, to obtain the grain structure of refinement;
(4) finish turning: on lathe gear ring 1 is carried out finish turning, along the circumferencial direction car bumper ring recess 4 of hole wall, the both ends of the surface of gear ring 1 keep the machining allowance of 0.35mm on the hole wall of the planet wheel endoporus 2 in the middle of the gear ring 1;
(5) ultrasonic flaw detection: with ultrasonic examination gear ring 1 inside zero defect is arranged, non-destructive testing standard is secondary;
(6) gear hobbing: the tooth section 3 to gear ring 1 outer surface on gear hobbing machine carries out roughing, and gear common normal keeps the machining allowance of 0.3mm;
(7) boring: along a plurality of oilholes 5 of the radially brill of planet wheel endoporus 2, oilhole 5 passes through the tooth root of tooth section 3, thereby makes planet wheel endoporus 2 surfaces that better lubrication and cooling be arranged in the course of the work on planet wheel endoporus 2 hole walls at gear ring 1 middle part;
(8) carburizing heat treatment: the gear ring 1 after will holing carries out Carburization Treatment at 940 ℃, and the time is 7 hours, and carbon potential is 0.9%; Then be cooled to 860 ℃, logical nitrogen is incubated 20 minutes in the temperature-fall period, is 1.6 hours from logical nitrogen to the cumulative time that insulation finishes; Quench in 860 ℃ after the arrangement of insulation knot;
(9) both ends of the surface of gear ring 1 are carried out plain grinding to required size, the planet wheel endoporus 2 with gear ring 1 is milled to required size again, centering end face when mill planet wheel endoporus 2, and pitch circle is beated＜0.01mm;
(10) roll flute: gear ring 1 is fixed on the gear grinding machine, take the both ends of the surface of gear ring 1 as benchmark, tooth section 3 is ground to required size;
(11) magnetic particle flaw detection: on magnetic particle flaw detector, tooth section 3 is carried out magnetic particle testing, check whether tooth section 3 has Grinding cracks and burn;
(12) tooth root reinforced peening: the tooth root to tooth section 3 carries out shot blast, and the pill of employing is alloy cast shot S230, and shot peening strength is 0.6 arc-height, surface coverage〉200%, surperficial residual pressure power〉60KSI;
(13) wear resistance: planetary pinion at 80 ℃ of lower 15min that process, is formed the iron Manganese Phosphate membrane on planetary surface, and the iron Manganese Phosphate membrane is heavy〉7.5g/m
2Planetary surface state behind wear resistance as shown in Figure 2.
Claims (5)
1. a mine car sedan-chair wheel reductor planetary pinion comprises gear ring (1), and the center of gear ring (1) is provided with planet wheel endoporus (2), at the outer surface of gear ring (1) tooth section (3) is set; It is characterized in that: the circumferencial direction along hole wall in the middle part of the hole wall of described planet wheel endoporus (2) arranges circlip groove (4), two sections endoporus about circlip groove (4) is divided into planet wheel endoporus (2).
2. mine car sedan-chair wheel reductor planetary pinion as claimed in claim 1 is characterized in that: the hole wall at the planet wheel endoporus (2) of described circlip groove (4) both sides arranges a plurality of oilholes (5) that star-wheel endoporus (2) radially arranges that follow.
3. mine car sedan-chair wheel reductor planetary pinion as claimed in claim 2, it is characterized in that: described oilhole (5) is communicated with the tooth root of gear ring (1) external teeth section (3).
4. mine car sedan-chair wheel reductor planetary pinion as claimed in claim 2, it is characterized in that: described planetary modulus is 5.08mm, and the number of teeth is 33, and the gear width is 101.5mm.
5. the planetary manufacture method of mine car sedan-chair wheel reductor is characterized in that, comprises following process step:
(1) forge: employing hardenability is that the 20MnCr5 alloy material forging of H5 obtains gear ring (1);
(2) rough turn: gear ring (1) is carried out rough turnly on lathe, gear ring (1) cylindrical, end face and planet wheel endoporus (2) keep 2 ~ 3mm machining allowance;
(3) conditioning heat treatment: with the gear ring after rough turn (1) high temperature normalizing 4.5 ~ 5.5 hours under 940 ~ 950 ℃ of conditions, again 620 ~ 630 ℃ of temper 3.5 ~ 4.5 hours;
(4) finish turning: on lathe gear ring (1) is carried out finish turning, along the circumferencial direction car bumper ring recess (4) of hole wall, the both ends of the surface of gear ring (1) keep the machining allowance of 0.3 ~ 0.4mm on the hole wall of the planet wheel endoporus (2) in the middle of gear ring (1);
(5) ultrasonic flaw detection: with ultrasonic examination gear ring (1) inside zero defect is arranged, non-destructive testing standard is secondary;
(6) gear hobbing: on gear hobbing machine roughing is carried out in the tooth section (3) of gear ring (1) outer surface, gear common normal keeps the machining allowance of 0.25 ~ 0.35mm;
(7) boring: along a plurality of oilholes of radially brill (5) of planet wheel endoporus (2), oilhole (5) is by the tooth root of tooth section (3) on planet wheel endoporus (2) hole wall at gear ring (1) middle part;
(8) carburizing heat treatment: the gear ring after will holing (1) carries out Carburization Treatment at 920 ~ 960 ℃, and the time is 6.8 ~ 7.2 hours, and carbon potential is 0.85 ~ 0.95%; Then be cooled to 850 ~ 870 ℃, logical nitrogen is incubated 10 ~ 30 minutes in the temperature-fall period, is 1.5 ~ 2 hours from logical nitrogen to the cumulative time that insulation finishes; Quench in 850 ~ 870 ℃ after the arrangement of insulation knot;
(9) both ends of the surface of gear ring (1) are carried out plain grinding to required size, the planet wheel endoporus (2) with gear ring (1) is milled to required size again;
(10) roll flute: gear ring (1) is fixed on the gear grinding machine, tooth section (3) is ground to required size;
(11) magnetic particle flaw detection: on magnetic particle flaw detector, tooth section (3) is carried out magnetic particle testing, check whether tooth section (3) has Grinding cracks and burn;
(12) tooth root reinforced peening: the tooth root to tooth section (3) carries out shot blast, and the pill of employing is the alloy cast shot, and shot peening strength is 0.5 ~ 0.7 arc-height, surface coverage〉200%, surperficial residual pressure power〉60KSI;
(13) wear resistance: planetary pinion at 70 ~ 100 ℃ of lower 10 ~ 20min that process, is formed the iron Manganese Phosphate membrane on planetary surface, and the iron Manganese Phosphate membrane is heavy〉7.5g/m
2
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