Wear-Resistant And Deformation-Resistant Rotary Kiln Gear Ring Supports Customization
Manufacturing process of large gear ring
2.1 Blank
The blank of steel casting is provided by the factory and is implemented according to the provisions of GB11352-89 standard. The casting is molded, smelted, poured, boxed, cleaned and trimmed according to the casting process requirements; the blank of steel casting is inspected according to the drawings and technical requirements during inspection and acceptance, and the next process is released after acceptance according to the provisions of JB/T6402-92 standard.
2.2 Rough processing
Marking and leaving machining allowance, alignment, connection, machining inner and outer circles, milling joint surfaces, drilling and other processes according to the requirements of the drawings.
2.3 Flaw detection
The whole is inspected by ultrasonic flaw detection, and the internal quality should meet the secondary requirements specified in GB7233-87 standard.
2.4 Normalizing pretreatment
The half gear ring is normalized and tempered in pairs to provide a good organization for subsequent surface quenching; and the deformation of the half gear ring after heat treatment is checked according to the requirements of the drawings.
2.5 Machining
First, connect the two half gear rings with high-strength bolts to form an integral gear ring. Process the inner and outer circles and upper and lower end faces of the integral gear ring according to the requirements of the drawings, and then mill the teeth according to the requirements of the drawings and machining process.
2.6 Eliminate machining stress
Anneal the integral gear ring to eliminate stress.
2.7 Surface quenching of the integral gear ring
The surface of the gear is induction quenched along the tooth groove by medium frequency induction quenching, with a hardness of HRC50~55 and an effective hardened layer depth of 3~5mm.
2.8 Final inspection
First, check whether the hardness of each tooth groove of the gear ring after medium frequency quenching and tempering meets the requirements of the drawings; secondly, check whether the maximum outer diameter D6944 size has increased. If the deformation is 3mm, mechanical correction is required until it is qualified; thirdly, magnetic particle flaw detection is performed on the gear teeth and transition fillets. The quality should meet the secondary requirements specified in the GB/T9444-88 standard; finally, final inspection is performed according to the drawings and technical requirements.
Product Parameters
| (1) GS42CrMo4 alloy cast steel (Enterprise Proprietary standard) HB 220-240 |
(1) Ladle refining of molten steel (argon blowing and R-H vacuum treatment) |
⑴ Mechanical properties and chemical composition of casting blanks (internal control standards) |
| ⑵ Half-length structure, Y-shaped sheet |
⑵Use the exclusive cold mold sand hanging technology to ensure the density of castings and teeth |
⑵ Ultrasonic flaw detection after rough machining |
| (3)helical tooth |
⑶ Normalizing treatment (proprietary technology) ensures the hardness of the tooth surface |
⑶ Ultrasonic flaw detection and magnetic particle flaw detection after semi-finishing and finishing |
| ⑷ Reasonable sealing and alignment structure |
⑷ After rough hobbing, loosen the gear, repair the joint surface, and then fine hobbing |
⑷ Magnetic particle flaw detection and hardness inspection of tooth surface |
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(5) Specialized self-made hob precision gear hobbing |
⑸ Tooth profile tolerance inspection |
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⑹ No-load test run before delivery to check the meshing accuracy of large and small gears |
Product Display
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