A large-sized bearing product heat treatment loading assembly

Abstract

The utility model discloses a super -large bearing product heat treatment loading subassembly, including material frame base, a plurality of arc material tray and a plurality of sector material tray, bearing ring coaxial is placed on material frame base, according to the size specification of bearing ring of placement, a plurality of arc material tray is placed in bearing ring outside in turn along the circumferential direction, a plurality of sector material tray is placed in bearing ring inside in turn along the circumferential direction, or a plurality of sector material tray is placed in bearing ring outside and inside in turn along the circumferential direction. The utility model can improve the phenomenon of low production capacity and big energy consumption caused by the idle area outside the ring not being fully utilized due to the big outer diameter size after the super -large bearing ring of previous well -type carburizing furnace loading is placed in the material frame circular base, and the production cost can be reduced significantly.

Description

Technical Field

[0001] This utility model relates to the field of heat treatment tool technology, specifically a heat treatment loading assembly for extra-large bearing products. Background Technology

[0002] When extra-large bearing rings undergo carburizing heat treatment in a pit furnace, they are loaded using a circular base rack, and the loading method is by simply placing them on the rack. The larger the ring size, the more empty space there is on the circular base of the rack. This loading method results in low production capacity and high energy consumption during the heat treatment process of extra-large bearings, increasing production costs, and needs to be improved. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a heat treatment loading assembly for extra-large bearing products. This assembly can maximize the utilization of the idle area of ​​the circular material rack, provide convenience for production organization, maximize the heat treatment loading capacity of extra-large bearing products, and significantly reduce production costs. This can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a heat treatment loading assembly for extra-large bearing products, including a material rack base, multiple arc-shaped material trays and multiple fan-shaped material trays, with bearing rings coaxially placed on the material rack base. According to the size and specifications of the bearing rings, multiple arc-shaped material trays are arranged sequentially along the circumferential direction on the outer side of the bearing rings, multiple fan-shaped material trays are arranged sequentially along the circumferential direction on the inner side of the bearing rings, or multiple fan-shaped material trays are arranged sequentially along the circumferential direction on the outer and inner sides of the bearing rings.

[0005] Preferably, the arc-shaped tray is used to place the rollers, and the bottom surface of the arc-shaped tray has a number of shuttle-shaped slots. The bottom middle rib of the arc-shaped tray divides it into two symmetrical parts. There is a certain interval between the shuttle-shaped slots, and the shuttle-shaped slots are arranged in a cross-staggered and same-direction manner.

[0006] Preferably, the fan-shaped material tray is used to place the rollers. The bottom of the fan-shaped material tray has four regions. The bottom surface of each of the four regions is provided with a number of shuttle-shaped slots. There is a certain interval between the shuttle-shaped slots. The shuttle-shaped slots in each region are arranged in a staggered manner with the same orientation. The shuttle-shaped slots in two adjacent regions are arranged perpendicular to each other.

[0007] Preferably, each of the four areas of the fan-shaped material tray is provided with through holes for installing the material frame support column.

[0008] Preferably, the base of the material rack is provided with a hanging column at its center.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: When the carburizing process and the technical requirements for the depth of the carburized layer are the same for extra-large bearing rings and rollers of the same steel grade, the rings and rollers can be installed on the same furnace rack. In addition to placing the rings, all the empty areas outside the area occupied by the rings on the rack base are filled with arc-shaped or fan-shaped material trays. In the specific application during the production process, the position and number of arc-shaped or fan-shaped material trays can be flexibly controlled according to the size of the empty area after the rings are installed. This allows the empty area of ​​the circular rack to be utilized to the maximum extent, providing convenience for production organization while maximizing the heat treatment loading capacity of extra-large bearing products and significantly reducing production costs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a schematic diagram of the arc-shaped material tray structure of this utility model;

[0012] Figure 3 This is a schematic diagram of the fan-shaped tray structure of this utility model;

[0013] Figure 4 This is a schematic diagram of the shuttle-shaped slot of this utility model.

[0014] In the diagram: 1. Material rack base, 2. Arc-shaped material tray, 3. Hanging column, 4. Fan-shaped material tray, 4.1. Through hole. Detailed Implementation

[0015] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0016] Please see Figure 1-4 This utility model provides a technical solution: a heat treatment loading assembly for extra-large bearing products, including a material rack base 1, multiple arc-shaped material trays 2 and multiple fan-shaped material trays 4. A hanging column 3 is provided at the center of the material rack base 1. The bearing rings are coaxially placed on the material rack base 1. According to the size and specifications of the bearing rings, multiple arc-shaped material trays 2 are arranged in sequence along the circumferential direction on the outside of the bearing rings, and multiple fan-shaped material trays 4 are arranged in sequence along the circumferential direction on the inside of the bearing rings, or multiple fan-shaped material trays 4 are arranged in sequence along the circumferential direction on the outside and inside of the bearing rings.

[0017] Specifically, the arc-shaped material tray 2 is used to place rollers. The bottom surface of the arc-shaped material tray 2 has several shuttle-shaped slots. The bottom middle rib of the arc-shaped material tray 2 divides it into two symmetrical parts. There is a certain interval between the shuttle-shaped slots, and the shuttle-shaped slots are arranged in a crisscrossing and staggered manner with the same orientation. The fan-shaped material tray 4 is used to place rollers. The bottom of the fan-shaped material tray 4 is divided into four areas. The bottom surface of each of the four areas has several shuttle-shaped slots. There is a certain interval between the shuttle-shaped slots. The shuttle-shaped slots in each area are arranged in a crisscrossing and staggered manner with the same orientation. The shuttle-shaped slots in two adjacent areas are arranged perpendicular to each other. The arc-shaped material tray 2 and the fan-shaped material tray 4 can be stacked in multiple layers as needed. Each of the four areas of the fan-shaped material tray 4 has through holes 4.1 for installing the material frame support columns.

[0018] By using a combination of arc-shaped material tray 2 and fan-shaped material tray 4, when the carburizing process and the technical requirements for the depth of the carburized layer are the same for extra-large bearing rings and rollers of the same steel grade, the rings and rollers can be loaded into the same furnace. In addition to placing the rings, the rollers are placed in the empty area outside the space occupied by the rings on the material rack base 1. This can maximize the utilization of the empty area of ​​the circular material rack, thereby maximizing the heat treatment loading capacity of extra-large bearing products.

[0019] It should be noted that both the arc-shaped material tray 2 and the fan-shaped material tray 4 are precision castings with smooth, flat surfaces and no defects. The castings undergo artificial aging treatment followed by shot blasting.

[0020] Example 1: A certain type of carburized steel bearing race is made of G20Cr2Ni4A material, with an inner diameter of Ф950mm, requiring a carburized layer depth ≥4.5mm; the carburized steel bearing roller is also made of G20Cr2Ni4A material, requiring a carburized layer depth ≥4.5mm. The carburizing process for the race and roller is the same. The existing carburizing material holder has a circular base with an outer diameter of Ф2900mm. When loading the above product for heat treatment carburizing:

[0021] 1. First, arrange the rings according to the process requirements;

[0022] 2. In the empty area formed between the outer diameter surface of the ring and the edge of the material rack base, a fan-shaped material tray 4 is preferred. The rollers are arranged in a circle along the circumference. The number of stacked layers is determined according to the process requirements. The rollers are placed in the fan-shaped material tray 4 according to the process requirements.

[0023] 3. In the empty area formed by the inner surface of the ring and the hanging column hole of the material rack, the fan-shaped material tray 4 is preferred. The rollers are arranged in a circle along the circumference. The number of stacked layers is determined according to the process requirements. The rollers are placed in the fan-shaped material tray 4 according to the process requirements.

[0024] Example 2: A certain type of carburized steel bearing race is made of G20Cr2Ni4A material, with an outer diameter of Ф2300mm and a required carburized layer depth ≥4.5mm; the carburized steel bearing roller is also made of G20Cr2Ni4A material, with a required carburized layer depth ≥4.5mm. The carburizing process for the race and roller is the same. The existing carburizing material holder has a circular base with an outer diameter of Ф2900mm. When loading the above product for heat treatment carburizing:

[0025] 1. First, arrange the rings according to the process requirements. If the rings are too large, they can only be placed through the hanging rod.

[0026] 2. In the empty area formed by the inner surface of the ring and the hanging column hole of the material rack, the fan-shaped material tray 4 is preferred. The rollers are arranged in a circle along the circumference. The number of stacked layers is determined according to the process requirements. The rollers are placed in the fan-shaped material tray 4 according to the process requirements.

[0027] 3. In the narrow open area between the outer diameter surface of the ring and the edge of the material rack base, if there is no material placement frame, the arc-shaped material tray 2 should be selected first. Arrange the rollers in a circle along the circumference and place them in the arc-shaped material tray 2 according to the process requirements.

[0028] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents in the content of this utility model.

Claims

1. A heat treatment loading assembly for an extra-large bearing product, characterized in that: Includes a material rack base (1), multiple arc-shaped material trays (2) and multiple fan-shaped material trays (4). The bearing rings are placed coaxially on the material rack base (1). According to the size and specifications of the bearing rings, multiple arc-shaped material trays (2) are arranged in sequence along the circumferential direction on the outside of the bearing rings, and multiple fan-shaped material trays (4) are arranged in sequence along the circumferential direction on the inside of the bearing rings, or multiple fan-shaped material trays (4) are arranged in sequence along the circumferential direction on the outside and inside of the bearing rings.

2. The heat treatment loading assembly for an extra-large bearing product according to claim 1, characterized in that: The arc-shaped tray (2) is used to place the rollers. The bottom surface of the arc-shaped tray (2) is provided with several shuttle-shaped slots. The bottom middle rib of the arc-shaped tray (2) divides it into two symmetrical parts. There is a certain interval between the shuttle-shaped slots. The shuttle-shaped slots are arranged in a cross-staggered and opposite direction.

3. The heat treatment loading assembly for an extra-large bearing product according to claim 1, characterized in that: The fan-shaped tray (4) is used to place the roller. The bottom of the fan-shaped tray (4) is divided into four areas. The bottom surface of each of the four areas is provided with several shuttle-shaped slots. There is a certain interval between the shuttle-shaped slots. The shuttle-shaped slots in each area are arranged in a cross-staggered and opposite direction. The shuttle-shaped slots in two adjacent areas are arranged perpendicular to each other.

4. The heat treatment loading assembly for an extra-large bearing product according to claim 3, characterized in that: The four areas of the fan-shaped tray (4) are provided with through holes (4.1) for installing the material frame support column.

5. The heat treatment loading assembly for an extra-large bearing product according to claim 1, characterized in that: The center of the material rack base (1) is provided with a hanging column (3).

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