Quenching device capable of guaranteeing different hardness requirements of wheels

Abstract

The utility model belongs to the field of heat treatment, and provides a quenching device capable of ensuring different hardness requirements of wheels. The quenching device comprises a quenching frame chassis for placing the wheels horizontally, the center of the quenching frame chassis is provided with a quenching frame suspender which is vertical to the quenching frame chassis; a pressing die capable of sliding up and down along the lifting rod is sleeved on the lifting rod of the quenching frame; the pressing die press fitting is placed on wheels of the quenching frame chassis; the pressing die is tightly combined with the quenching frame suspender, and the lower end face of the pressing die and the upper end face of the quenching frame chassis are tightly attached to the upper end face and the lower end face of the horizontally-placed wheel respectively, so that an effective sealing face for preventing a quenching medium from entering is formed; and the outer circular surface of the wheel is exposed to form a contact surface which is in full contact with a quenching medium. The control problem that the surface hardness requirements of different parts of the wheel are different is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat treatment, and mainly relates to a quenching device that ensures different hardness requirements of wheels. Background Art

[0002] After overall quenching, the hardness of all parts of the surface of a general workpiece remains consistent. A user of a wheel product has put forward different technical requirements for the hardness of different parts. The structural diagram and hardness technical requirements of a wheel product are shown in Figure 1 ;from Figure 1 It can be seen that the surface quenching hardness requirements of different parts of the wheel are different, that is, the outer cylindrical surface A of the wheel requires a higher quenching hardness, requiring a quenching hardness of HB300-380, and the other end surfaces such as B1, C1, D1, B2, C2, and D2 require a lower quenching hardness, requiring a quenching hardness of HB<280; the conventional overall quenching method cannot meet the design requirements; it is necessary to design a special device to ensure that the hardness of different parts of the wheel product reaches different hardness requirements after overall quenching, so as to meet the product design requirements. Utility Model Content

[0003] In order to solve the control problem of different surface hardness requirements of different parts of the wheel, the purpose of the utility model is to provide a quenching device that can meet the different hardness requirements of the wheel.

[0004] The utility model adopts the following technical solutions to achieve the above purpose:

[0005] A quenching device capable of ensuring different hardness requirements of wheels, the quenching device comprises a quenching rack chassis for placing wheels flat; a quenching rack suspension rod arranged perpendicular to the quenching rack chassis is arranged at the center of the quenching rack chassis; a die which can slide up and down along the suspension rod is sleeved on the quenching rack suspension rod; the die is press-fitted on the wheel of the quenching rack chassis; the die is tightly combined with the quenching rack suspension rod, and the upper end surface of the die and the lower end surface of the quenching rack chassis are tightly fitted with the upper and lower end surfaces of the flat wheel respectively, forming an effective sealing surface to prevent the quenching medium from entering; the outer cylindrical surface of the wheel is exposed to form a contact surface that is fully in contact with the quenching medium.

[0006] The pressing die has an inner hole for the quenching rack suspension rod to pass through.

[0007] The top of the quenching rack suspension rod is provided with a suspension hole.

[0008] The utility model proposes a quenching device capable of ensuring different hardness requirements of wheels. By adopting the above technical scheme, the die is in close contact with the B1, C1 and D1 surfaces of the wheel with low hardness requirements, and the upper surface of the quenching frame chassis is in close contact with the B2, C2 and D2 surfaces of the wheel with low hardness requirements; when the wheel is quenched as a whole, effective sealing surfaces are formed between the die, the contact surface of the quenching frame chassis and the wheel product, and the inner hole of the die and the quenching frame suspension rod, so as to prevent the entry of the quenching medium, and form a protective effect on several parts with low hardness requirements, so as to ensure that the B1, C1, D1, B2, C2 and D2 surfaces of the wheel product are not hardened during quenching, and a lower quenching hardness is obtained; and the A surface of the wheel product is fully in contact with the quenching medium, and a higher quenching hardness is obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 Schematic diagram of the wheel structure.

[0010] Figure 2 A schematic structural diagram of the utility model.

[0011] In the figure: 1. die, 2. wheel, 3. quenching rack chassis, 4. quenching rack suspension rod. DETAILED DESCRIPTION

[0012] The present invention is described in detail with reference to the accompanying drawings and specific examples:

[0013] like Figure 2 As shown, a quenching device capable of ensuring different hardness requirements of wheels, the quenching device comprises a quenching rack chassis 3 for placing a wheel 2 flat; a quenching rack suspension rod 4 arranged perpendicular to the quenching rack chassis is arranged at the center of the quenching rack chassis 3; a die 1 which can slide up and down along the suspension rod is sleeved on the quenching rack suspension rod 4; the die 1 is press-fitted and placed on the wheel 2 of the quenching rack chassis; the die 1 is tightly combined with the quenching rack suspension rod 4, and the lower end surface of the die 1 and the upper end surface of the quenching rack chassis are tightly fitted with the upper and lower end surfaces of the flat wheel respectively, forming an effective sealing surface to prevent the quenching medium from entering; the outer cylindrical surface of the wheel is exposed to form a contact surface that is fully in contact with the quenching medium.

[0014] The pressing die has an inner hole for the quenching rack suspension rod to pass through.

[0015] The top of the quenching rack suspension rod is provided with a suspension hole.

[0016] When in use, first place the wheel 2 heated to the quenching temperature on the quenching rack chassis 3, and then quickly press the die 1 onto the upper surface of the wheel 2 along the quenching rack suspension rod 4; utilize the die's own weight and surface accuracy to tightly press the wheel 2 and the quenching rack chassis 3 so that their contact surfaces can form an effective sealing surface, thereby preventing the entry of the quenching medium; finally, use the overhead crane to hang the quenching rack assembly device into the quenching oil tank for quenching.

[0017] The lower surface of the die 1 and the upper surface of the quenching rack chassis 3 are machined to obtain a high plane accuracy, so that the surface in contact with the wheel product 2 forms a tight fitting surface, and an effective sealing surface is formed between the inner hole of the die 1 and the quenching rack hanger 4. After multiple production site verifications, the device can effectively prevent the entry of quenching medium, ensure that the surfaces of the wheel product with low hardness requirements are protected, and avoid excessive quenching hardness in these parts, while the surface hardness of the non-protected parts is not affected. The device is targeted according to the technical requirements of the inconsistent hardness requirements of different positions of the wheel product, so as to achieve the purpose of the hardness of different parts on a product meeting the product design requirements when the wheel product is quenched as a whole.

Claims

1. A quenching device for ensuring different hardness requirements of wheels, characterized by: The quenching device comprises a quenching rack chassis for placing the wheel flat; a quenching rack suspension rod arranged perpendicular to the quenching rack chassis is arranged at the center of the quenching rack chassis; a die which can slide up and down along the suspension rod is sleeved on the quenching rack suspension rod; the die is press-fitted on the wheel of the quenching rack chassis; the die is tightly combined with the quenching rack suspension rod, and the lower end surface of the die and the upper end surface of the quenching rack chassis are tightly fitted with the upper and lower end surfaces of the flat wheel respectively, forming an effective sealing surface to prevent the quenching medium from entering; the outer cylindrical surface of the wheel is exposed to form a contact surface that is fully in contact with the quenching medium.

2. A quenching device for ensuring different hardness requirements of wheels as claimed in claim 1, characterized in that: The pressing die has an inner hole for the quenching rack suspension rod to pass through.

3. A quenching device for ensuring different hardness requirements of wheels as claimed in claim 1, characterized in that: The top of the quenching rack suspension rod is provided with a suspension hole.

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