Surface treatment nitridizing furnace

Abstract

The invention belongs to the technical field of part treatment and specifically provides a surface treatment nitridizing furnace. The surface treatment nitridizing furnace comprises a cylindrical furnace body. A set of flame spray pipes are uniformly distributed on the circumference of the bottom of the furnace body. The bottom center of the interior of the furnace body is provided with a nitridizing tank. The nitridizing tank contains a nitridizing agent solution. The bottom of the nitridizing tank is provided with a gas supply pipe communicating with an external nitrogen tank. The middle portion of the furnace body is rotatably connected with a round tube. The round tube is driven to rotate by a motor fixed to the outer wall of the furnace body. The motor is connected with a power supplythrough a controller. The end, close to the middle portion of the furnace body, of the round tube is fixedly connected with a gear. The gear is engaged with a gear ring to be treated. The bottom of the gear ring is soaked in the nitridizing agent solution. According to the surface treatment nitridizing furnace, the gear drives the gear ring to rotate, so that the gear ring is rapidly heated in the furnace body, and the portion, located above the nitridizing agent solution, of the gear ring is rapidly heated and then rotated into the nitridizing agent solution. The temperature rising rate of the gear ring is further increased, and the nitridizing quality and efficiency of the gear ring are improved.

Description

technical field [0001] The invention belongs to the technical field of parts treatment, in particular to a nitriding furnace for surface treatment. Background technique [0002] The functions of the car's gearbox include changing the transmission ratio; driving the car in reverse when the engine's rotation direction remains unchanged; using neutral gear to interrupt power transmission so that the engine can be aerodynamic, idle, and neutral with the transmission or perform power transmission. The gearbox mainly includes gears, shafts and pins. There is a ring gear on the outer peripheral surface of the gear. The ring gear is divided into a front ring gear and a rear ring gear. The gears mesh to rotate the crankshaft and start the engine. [0003] The existing treatment process of ring gear includes forging blank, rough and semi-finish turning, gas nitriding, polishing, end face grinding, final inspection and seven-step process of finished product. After treatment, the ring...

AI Technical Summary

Problems solved by technology

[0006] In order to make up for the deficiencies of the existing technology, the transmission ring gear of the gas nitriding treatment not only needs a long nitriding production cycle, low efficiency, and high brittleness of the nitriding layer, but also often causes ring gear ends and gears due to uneven gas nitriding. Surface wear and meshing are not good, causing abnormal noise in the operation of the transmission. The invention proposes a nitriding furnace for surface treatment.

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