Carburizing basket for heat treatment of cross shaft

Abstract

The carburizing basket comprises a basket body, a first air hole is formed in the basket body, a vertically-arranged ventilation column is arranged on the inner wall of the bottom of the basket body, a through hole is formed in the ventilation column in the axis direction of the ventilation column, and a second air hole is formed in the side wall of the ventilation column. A containing cavity used for storing the cross shaft during carburizing is formed between the ventilation column and the basket body. The ventilation columns are arranged in the basket body, a carburizing agent can enter the containing cavity through the first air holes, the second air holes and the upper opening of the basket body in the carburizing process, the contact area of the carburizing agent and the cross shaft can be increased, the stability of product quality and the qualified rate can be improved, and meanwhile the structure is simple, manufacturing is easy, and cost is low.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment technology for cross shafts, and specifically to a carburizing basket for heat treatment of cross shafts. Background Technology

[0002] The cross shaft is a joint component of the universal joint transmission device in the automotive drive system. During the production process, it needs to undergo carburizing and quenching heat treatment in a carburizing furnace to control its surface hardness, effective hardened layer, core hardness and metallographic structure, so that it has high wear resistance and fatigue resistance under service conditions.

[0003] During carburizing heat treatment, the cross shaft needs to be placed in a carburizing box, which is then pushed into the carburizing furnace. Inside the furnace, the box is moved by intermittent pushers, and the carburizing agent is adsorbed onto the surface of the cross shaft and gradually diffuses inward. However, in existing carburizing boxes, the cross shafts tend to accumulate, affecting the carburizing effect. Utility Model Content

[0004] To address the above problems, this utility model proposes a carburizing basket for cross-shaped heat treatment, the specific technical solution of which is as follows:

[0005] A carburizing basket for heat treatment of cross shafts includes a basket body with a first vent hole on the basket body, a vertically arranged vent column on the bottom inner wall of the basket body, a through hole in the vent column along its axis, and a second vent hole on the side wall of the vent column. A placement cavity for storing cross shafts during carburizing is formed between the vent column and the basket body.

[0006] Furthermore, the cross-section of the vent column is annular, and the second air pores are evenly distributed along the axial direction and the circumferential direction on the vent column.

[0007] Furthermore, the basket has an open top structure, and each wall of the basket is provided with a first vent. The first vents are evenly distributed along the length and width directions on the wall of the basket where they are located. During carburizing, the carburizing agent can enter the placement cavity through the first vent, the second vent, and the top opening of the basket.

[0008] Furthermore, a boss is provided at the center of the bottom inner wall of the basket, and the ventilation column is fitted onto the boss.

[0009] Furthermore, all the pores are waist-shaped.

[0010] The beneficial effects of this utility model are as follows:

[0011] This invention, by setting a breathable column inside the basket, allows the carburizing agent to enter the placement cavity through the first vent, the second vent, and the upper opening of the basket during the carburizing process. This increases the contact area between the carburizing agent and the cross shaft, which is beneficial to improving the stability and pass rate of product quality. At the same time, the structure is simple, easy to manufacture, and has a low cost. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the carburizing basket for heat treatment of the cross shaft according to this utility model;

[0014] Figure 2 This is a cross-sectional view of the carburizing basket for heat treatment of the cross shaft described in this utility model.

[0015] In the diagram: 1. Basket body; 1.1. First air hole; 2. Ventilation column; 2.1. Second air hole; 3. Boss. Detailed Implementation

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0017] The present invention provides the following specific implementation scheme:

[0018] like Figure 1-2 As shown, this utility model provides a carburizing basket for heat treatment of a cross shaft, including a basket body 1. The basket body 1 is provided with a first vent 1.1. A vent column 2 is provided on the bottom inner wall of the basket body 1. The vent column 2 is arranged vertically and has a through hole along its axial direction. A second vent 2.1 is provided on the side wall of the vent column 2. A placement cavity for placing the cross shaft during carburizing is formed between the vent column 2 and the basket body 1. During carburizing, the carburizing agent can enter the placement cavity through the first vent 1.1 and the second vent 2.1.

[0019] Furthermore, the cross-section of the vent column 2 is annular, and the second air holes 2.1 are evenly distributed along the axial direction and circumferential direction on the vent column 2. The outer surface of the vent column 2 is cylindrical to avoid scratching the cross shaft.

[0020] Furthermore, the basket 1 is a cube structure with an open top, which facilitates the insertion of the cross shaft into the basket 1. The lower wall and four side walls of the basket 1 are provided with first vents 1.1. The first vents 1.1 are evenly distributed along the length and width directions on their respective wall surfaces. During carburizing, the carburizing agent can enter the placement cavity through the first vents 1.1, the second vents 2.1 and the upper opening of the basket 1, and further diffuse in the gaps between the cross shafts.

[0021] Furthermore, a boss 3 is provided at the center of the bottom inner wall of the basket 1, and the ventilation column 2 is fitted on the boss 3. The boss 3 is used to initially fix the position of the ventilation column 2. After the cross shaft is stacked, the position of the ventilation column 2 is further fixed.

[0022] Furthermore, all the air holes are waist-shaped, which facilitates processing and makes it easier to stably place the hook into the first air hole when transferring the basket.

[0023] Before carburizing, the vent column 2 is fitted onto the boss 3, the cross shaft is placed in the placement cavity, and then the basket 1 is placed in the carburizing furnace. During carburizing, the gaseous carburizing agent can enter the placement cavity through the first vent 1.1, the second vent 2.1 and the upper opening of the basket 1, and diffuse between the cross shafts through the gaps between the cross shafts. The carburizing agent is adsorbed on the surface of the cross shaft and further diffuses into the interior of the cross shaft.

[0024] This invention, by setting a breathable column 2 inside the basket 1, allows the carburizing agent to enter the placement cavity through the first vent 1.1, the second vent 2.1, and the upper opening of the basket 1 during the carburizing process. This increases the contact area between the carburizing agent and the cross shaft, which is beneficial to improving the stability and pass rate of product quality. At the same time, the structure is simple, easy to manufacture, and has a low cost.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A carburizing basket for heat treatment of a cross axle, comprising a basket body (1), wherein a first air hole (1.1) is arranged on the basket body (1), characterized in that: The bottom inner wall of the basket (1) is provided with vertically arranged ventilation columns (2), and the ventilation columns (2) are provided with through holes along their axial direction. The side wall of the ventilation columns (2) is also provided with a second air hole (2.1). A placement cavity for storing the cross shaft during carburizing is formed between the ventilation columns (2) and the basket (1).

2. The carburating basket for heat treatment of a cross axle according to claim 1, wherein: The cross-section of the ventilated column (2) is circular, and the second air hole (2.1) is evenly distributed on the ventilated column (2) along the axial direction and the circumferential direction.

3. The carburating basket for heat treatment of a cross axle according to claim 1, wherein: The basket (1) has an open top structure. Each wall of the basket (1) is provided with a first vent (1.1). During carburizing, the carburizing agent can enter the placement cavity through the first vent (1.1), the second vent (2.1) and the open top of the basket (1).

4. The carburating basket for heat treatment of a cross axle according to claim 1, wherein: The bottom inner wall of the basket (1) is also provided with a boss (3), and the ventilation column (2) is fitted on the boss (3).

5. The carburating basket for heat treatment of a cross axle according to claim 1, wherein: All pores are oblong.

Images