Nitrocarburizing dehydration shaft based on nitriding technology

Abstract

The nitrocarburizing dehydration shaft based on the nitriding technology comprises a step shaft, the top of the step shaft is provided with an external thread, the outer wall of the top of the step shaft is provided with a gear ring, a step hole is formed in a cavity of the step shaft, the step shaft is integrally formed, and the outer wall of the step shaft is provided with an external thread. The outer surface of the step shaft adopts a nitrocarburizing metal surface treatment technology, so that the dehydration shaft has higher hardness, HV 0.1 is more than 600 under Vickers hardness measurement, fatigue resistance and excellent wear resistance, the salt spray test of the dehydration shaft subjected to nitrocarburizing in corrosion detection is more than 300 hours, the service life of the dehydration shaft is indirectly prolonged, and the service life of the dehydration shaft is prolonged. Meanwhile, the nitrocarburizing treatment temperature is low, deformation of the step shaft during nitriding can be reduced, the yield of the step shaft is guaranteed, the check ring groove is used for providing axial positioning and axial fixing, the two sets of oil grooves form an oil film, friction loss is avoided, environmental corrosion is reduced, the service life is prolonged, and good market benefits are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitriding technical field, concretely is a kind of dehydration shaft based on nitrogen and carbon co-permeation of nitriding technology. BACKGROUND

[0002] Dehydration shaft is the key component in washing machine and dehydrator, its main function is to support and rotate dehydration cylinder in the dehydration process, in practical application, dehydration shaft is widely used in various industrial dehydration equipment, significantly improve the operation efficiency and reliability of equipment, especially in reducing manual intervention and maintenance requirements.

[0003] At present, dehydration shaft is integrally formed to improve its service life and stability, but dehydration shaft problem comes one after another in actual use, due to the working environment leading to shaft surface wear, fracture and corrosion, the reason lies in the surface treatment technology of dehydration shaft, and the structure cannot realize lubrication effect, need regular maintenance and inspection, need to smear grease to reduce friction coefficient and prevent corrosion.

[0004] Based on this, the utility model discloses a kind of dehydration shaft based on nitrogen and carbon co-permeation of nitriding technology to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of dehydration shaft based on nitrogen and carbon co-permeation of nitriding technology to solve the problem that the surface wear, fracture and corrosion of shaft are caused by working environment in the above background technology, the reason lies in the surface treatment technology of dehydration shaft, and the structure cannot realize lubrication effect, need regular maintenance and inspection, need to smear grease to reduce friction coefficient and prevent corrosion.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of dehydration shaft based on nitrogen and carbon co-permeation of nitriding technology, including stepped shaft, the stepped shaft top is provided with outer thread, the stepped shaft top outer wall is provided with gear ring, stepped hole is arranged in the stepped shaft cavity, the stepped shaft is integrally formed, the stepped shaft outer surface uses nitrogen and carbon co-permeation metal surface treatment technology.

[0007] Preferably, the stepped hole top inner wall is provided with ring oil groove, the stepped hole bottom inner wall is provided with eight-character oil groove.

[0008] Preferably, the gear ring top is provided with retainer groove.

[0009] Compared with prior art, the utility model has the beneficial effects that:

[0010] 1. The utility model discloses a one-piece manufacturing, and the structural strength is greatly improved, the utility model discloses a nitrocarburizing process in nitrogenization technology, so that the utility model surface has higher hardness, under the measurement of Vickers hardness, HV0.1>600, fatigue resistance and excellent wear resistance, the utility model after nitrocarburizing has higher corrosion resistance, and the salt spray test in the corrosion experiment is more than 300 hours, indirectly improves the service life of the dehydration shaft, and the nitrocarburizing treatment temperature is lower, can reduce the deformation of the dehydration shaft when nitriding, and guarantees the yield of the dehydration shaft.

[0011] 2. The utility model discloses that the inside is provided with splayed oil groove and ring oil groove, is in order to store some increase grease storage capacity in the installation process, ensure sufficient lubrication and reduce the friction coefficient, also protect the shaft body and the component connected with it simultaneously, the oil groove will form oil film and avoid friction loss and reduce environmental corrosion, prolong the service life, also play the sealing and the effect of reducing noise, and the baffle groove is used to install elastic baffle, is used to provide axial positioning and axial fixation, prevents the gear ring outer wall installation part from moving or loosening in the use process, also compensate the clearance of the top of gear ring simultaneously, relative to other fixing device, simple structure, simple and convenient to install. DRAWINGS

[0012] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the embodiment description needed to use the drawing briefly introduced, obviously, the drawing in the following description only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0013] Figure 1 It is structure schematic diagram of the utility model embodiment 1;

[0014] Figure 2 It is structure schematic diagram of the utility model embodiment 2 shaft measurement perspective;

[0015] Figure 3 It is structure schematic diagram of the utility model;

[0016] Figure 4 It is structure schematic diagram of the utility model left side perspective;

[0017] Figure 5 It is structure schematic diagram of the utility model overhead perspective;

[0018] In the drawing, the component list represented by each sign is as follows:

[0019] 1, step shaft;2, external thread;3, gear ring;4, step hole;5, splayed oil groove;6, baffle groove;7, ring oil groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the 1-5 drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] Please refer to the drawings Figure 1 The utility model provides a kind of technical scheme: a nitrogen carbon co-permeation dehydration shaft based on nitriding technology, including stepped shaft 1, stepped shaft 1 top is equipped with outer thread 2, stepped shaft 1 top outer wall is equipped with gear ring 3, stepped shaft 1 chamber is equipped with stepped hole 4, the stepped shaft 1 is integrally formed, stepped shaft 1 outer surface uses nitrogen carbon co-permeation metal surface treatment technology.

[0023] One specific application of this embodiment is: the utility model is integrally formed, and the structural strength is greatly improved.The utility model is processed by nitrogen carbon co-permeation process in nitriding technology;

[0024] S1, furnace loading: the product is combined with heat treatment tooling, and there is spacing between the products, and they are not extruded, which can prevent deformation during heat treatment and ensure uniform penetration layer during heat treatment;

[0025] S2, cleaning: remove surface grease by alkaline cleaning;

[0026] S3, salt bath nitrogen carbon co-permeation, temperature greater than 500 DEG C, maintain for more than 2 hours; obtain a compound layer of ε-Fe2-3N with a thickness of about 15 μm on the surface, and the surface hardness reaches 450-650 HV, and a diffusion layer with a depth of about 0.2-0.3 mm is also obtained;

[0027] S4, cooling by water cooling: rapid cooling, nitrogen in the diffusion layer is solid-solved in α-Fe, which plays a solid-solution strengthening role and can improve the strength and fatigue resistance of the material;

[0028] S5, post-cleaning: remove residual salt marks on the surface of the product by flowing water cleaning;

[0029] S6, post-treatment by vibration grinding: remove the ash produced on the surface of the product during nitriding by vibration grinding, expose the bright, homogeneous and clean surface, and also remove the stamping burrs to improve the use performance of the product;

[0030] S7, rust prevention: product protection

[0031] This process results in the stepped shaft 1 having a high surface hardness, with HV0.1 > 600 under Vickers hardness measurement, as well as excellent fatigue resistance and wear resistance. The stepped shaft 1 after nitrocarburizing exhibits high corrosion resistance, with a salt spray test result of > 300 hours in corrosion detection, indirectly improving the service life of the stepped shaft 1. At the same time, the lower temperature of the nitrocarburizing treatment can reduce the deformation of the stepped shaft 1 during nitriding, ensuring the yield of the stepped shaft 1.

[0032] Example 2

[0033] Based on Embodiment 1, as shown in the attached figure, an annular oil groove 7 is provided on the inner wall of the top of the stepped hole 4, and an eight-shaped oil groove 5 is provided on the inner wall of the bottom of the stepped hole 4.

[0034] As shown in the attached figure, a retaining ring groove 6 is provided on the top of the gear ring 3;

[0035] In this embodiment, the figure-eight oil groove 5 and the annular oil groove 7 are opened on the inner wall of the stepped hole 4 to store some grease during the installation process, ensuring sufficient lubrication and reducing the coefficient of friction. At the same time, it also protects the shaft and the parts connected to it. The oil groove will form an oil film to avoid friction loss and reduce environmental corrosion, extend service life, and also play a role in sealing and noise reduction. The retaining ring groove 6 is used to install the elastic retaining ring, which provides axial positioning and axial fixation, preventing the parts mounted on the outer wall of the gear ring 3 from moving or loosening during use. It also compensates for the gap at the top of the gear ring 3. Compared with other fixing devices, it is easy to install and has a simple structure, and also forms secondary protection.

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A nitrocarburized dehydrated shaft based on nitriding technology, comprising a stepped shaft (1), characterized in that: The stepped shaft (1) is provided with external threads (2) on the top, the stepped shaft (1) is provided with a gear ring (3) on the outer wall of the top, the stepped shaft (1) is provided with stepped holes (4) in the cavity, the stepped shaft (1) is integrally formed, and the outer surface of the stepped shaft (1) is treated by nitrogen-carbon co-permeation metal surface treatment technology.

2. A nitrocarburized dehydrated shaft based on nitriding technology according to claim 1, characterized in that: The stepped holes (4) are provided with ring oil grooves (7) on the inner wall of the top, and the stepped holes (4) are provided with eight-shaped oil grooves (5) on the inner wall of the bottom.

3. A nitrocarburized dehydrated shaft based on nitriding technology according to claim 1, characterized in that: The gear ring (3) is provided with a retainer groove (6) on the top.

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