Carburizing mould

Abstract

The utility model relates to the technical field of secondary quenching treatment of metal workpieces, in particular to a carburizing mould which comprises a mould body, the mould body is of a hollow columnar structure, the mould body is provided with an inner diameter surface and an outer diameter surface which are opposite to each other, the outer diameter surface is provided with a plurality of grooves parallel to the axial direction of the mould body, and the grooves are communicated with the inner diameter surface and the outer diameter surface. The outer diameter surface is used for supporting the inner wall of the ferrule, the width height of the clamping fixture body is larger than or equal to that of the ferrule, the clamping fixture is of the hollow columnar structure, the width height of the clamping fixture body is large, any height position of the inner diameter of the ferrule can be effectively supported by the clamping fixture body, and then the phenomenon that the center of the ferrule is concave after carburization can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal workpiece secondary quenching treatment technical field, concretely is a carburizing fixture. BACKGROUND

[0002] At present, the secondary quenching cooling in the heat treatment process of carburizing steel bearing ring is completed in quenching oil, and the inner surface of the ring needs to be supported by a fixture during cooling to control the size expansion and deformation. Specifically, a carburizing fixture is installed inside the carburizing steel bearing ring to support the inner diameter of the ring, and then the ring with the installed carburizing fixture is placed inside a device filled with cooling quenching oil medium. The existing carburizing fixture has a low height, which cannot support the entire inner diameter of the ring, and the phenomenon of concave center in the middle of the ring after carburizing may occur. SUMMARY

[0003] In view of the defects of the prior art, the utility model provides a carburizing fixture, which is a hollow columnar structure, the height of the fixture body is greater than or equal to the height of the ring, and the inner diameter of the ring at any height position can be effectively supported by the fixture body, thereby reducing the phenomenon of concave center in the middle after carburizing.

[0004] To achieve the above purpose, the utility model provides a technical scheme of a carburizing fixture, which comprises a fixture body, the fixture body is a hollow columnar structure, the fixture body has opposite inner diameter surfaces and outer diameter surfaces, the outer diameter surfaces are provided with a plurality of grooves parallel to the axial direction of the fixture body, the outer diameter surfaces are used for supporting the inner wall of the ring, and the height of the fixture body is greater than or equal to the height of the ring.

[0005] Further, the outer diameter surface is provided with at least one annular groove along the circumferential direction.

[0006] Further, the annular groove is provided with two.

[0007] Further, the carburizing fixture comprises an auxiliary gasket, the inner diameter of the auxiliary gasket is greater than the outer diameter of the fixture body and smaller than the outer diameter of the end surface of the ring.

[0008] Further, the groove has an arc surface recessed towards the axis of the fixture body.

[0009] Further, the carburizing fixture comprises a gasket, when the gasket is coaxially arranged on one side of the fixture body, at least part of the end surface of the gasket is in contact with the end surface of the fixture body.

[0010] Further, the inner diameter of the gasket is equal to the inner diameter of the fixture body, and the outer diameter of the gasket is smaller than or equal to the outer diameter of the fixture body.

[0011] The utility model discloses a hollow cylindrical structure, the width height of the mould body is greater than or equal to the width height of the ring, the inner diameter of the ring can be effectively supported at any height position, and the phenomenon of the middle concave core after carburizing can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structure schematic diagram of a carburizing mould in an embodiment of the utility model;

[0013] Figure 2 It is a sectional view of a carburizing mould in an embodiment of the utility model;

[0014] Figure 3 It is a use state diagram (when unloading the carburizing mould) of a carburizing mould in an embodiment of the utility model;

[0015] Figure 4 It is a use state diagram (when secondary quenching) of a carburizing mould in another embodiment of the utility model;

[0016] In the drawings:

[0017] 100, the mould body, 110, the inner diameter surface, 120, the outer diameter surface, 121, the groove, 1211, the arc surface, 122, the annular groove,

[0018] 200, the auxiliary gasket,

[0019] 300, the gasket,

[0020] 10, the ring. DETAILED DESCRIPTION

[0021] In order to make the above purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is explained in detail below. In the following description, a lot of specific details are set forth in order to fully understand the utility model. But the utility model can be implemented in many other ways different from the description, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the following disclosed specific embodiments.

[0022] Referring to Figure 1 And Figure 2 An embodiment of the utility model provides a carburizing mould, which comprises a mould body 100, the mould body 100 is hollow cylindrical structure, the mould body 100 has opposite inner diameter surface 110 and outer diameter surface 120, the outer diameter surface 120 is provided with a plurality of grooves 121 parallel to the axial direction of the mould body 100, and the outer diameter surface 120 is used to support the inner wall of the ring 10, and the width height of the mould body 100 is greater than or equal to the width height of the ring 10.

[0023] The above-mentioned carburizing jig is a hollow columnar structure, and the width is greater than or equal to the width of the ring 10. In addition to the position where the groove 12 is arranged, the entire inner diameter surface can be supported, and the phenomenon of the middle concave core of the ring after carburizing due to insufficient width can be effectively avoided. In addition, during the secondary quenching cooling process of the carburizing steel bearing ring heat treatment process, if the carburizing jig mounted on the ring has a jig claw, the ring can only be placed in the cooling quenching oil medium statically, and the ring cannot fully contact the cooling quenching oil medium, and the effect of secondary quenching cooling is not good. On the contrary, when the above-mentioned carburizing jig is used to support the inner surface of the ring, the size expansion and deformation in the process can be controlled, the entire ring can be supported, and because no jig claw is arranged around the jig, the ring with the carburizing jig can be placed on the upper part of the rotating roller, the ring is driven to rotate, so that the ring can fully contact the cooling quenching oil medium, and the effect of secondary quenching cooling is optimized.

[0024] In an embodiment, at least one annular groove 122 is arranged on the outer diameter surface 120 along the circumferential direction. The annular groove 122 is an oil groove, which enables oil to flow in the carburizing jig, and can accelerate the cooling speed.

[0025] In an embodiment, two annular grooves 122 are arranged.

[0026] Referring to Figure 3 In an embodiment, the carburizing jig comprises an auxiliary gasket 200, the inner diameter of the auxiliary gasket 200 is greater than the outer diameter of the jig body 100, and is less than the outer diameter of the end surface of the ring 10.

[0027] It should be noted that in order to facilitate the carburizing jig to be taken out from the inside of the ring 10 after the secondary quenching is completed, a base and a connecting ear / jig claw are arranged on one side of the columnar carburizing jig. In order to facilitate force application, the connecting ear / jig claw will protrude beyond the outer diameter of the ring 10 after the carburizing jig is installed. Due to the existence of the connecting ear / jig claw, the ring 10 can only be placed in the cooling quenching oil medium statically, and the ring 10 itself cannot roll. If the ring 10 rolls, the connecting ear / jig claw will interfere with and collide with the internal structure of the secondary quenching device, and therefore the cooling quenching oil medium is usually agitated to make the cooling quenching oil medium contact the ring 10. Due to the fact that the ring 10 is static, the medium can not fully contact the ring 10. The material of the auxiliary gasket 200 is bearing low-carbon steel.

[0028] Referring to Figure 3 and Figure 4In the embodiment, the auxiliary gasket 200 is arranged to assist in the dismounting of the sleeve ring 10 from the carburizing fixture, and when the sleeve ring 10 is used, the end surface of the sleeve ring 10 with the carburizing fixture is placed on the auxiliary gasket 200, and the press machine exerts downward pressure on the intermediate carburizing fixture to dismount the carburizing fixture from the inside of the sleeve ring 10, so that the press machine is involved, time and labor are saved, and efficiency is improved. In the process of secondary quenching, the carburizing fixture is mounted inside the sleeve ring 10, the auxiliary gasket 200 is removed and does not participate in the secondary quenching, there is no part of the carburizing fixture that protrudes outside and exceeds the outer diameter of the sleeve ring 10, and the inside rotating roller of the secondary quenching device is used to drive the sleeve ring 10 to rotate, the secondary quenching is performed in the rotating process, the contact between the sleeve ring 10 and the cooling quenching oil medium is more sufficient, and the secondary quenching effect and the secondary quenching efficiency are improved.

[0029] In an embodiment, the groove 121 has a concave arc surface 1211 recessed to the axis of the fixture body 100. The groove 121 can provide a channel for the cooling quenching oil medium to flow, and the concave arc surface 1211 can expand the cross-sectional area of the channel, which is beneficial to the sufficient contact between the cooling quenching oil medium and the sleeve ring and optimizes the secondary quenching effect.

[0030] In an embodiment, the carburizing fixture comprises a gasket 300, and when the gasket 300 is coaxially arranged on one side of the fixture body 100, at least part of the end surface of the gasket 300 is in contact with the end surface of the fixture body 100.

[0031] In an embodiment, the inner diameter of the gasket 300 is equal to the inner diameter of the fixture body 100, and the outer diameter of the gasket 300 is less than or equal to the outer diameter of the fixture body 100.

[0032] The carburizing fixture provided with the gasket 300 can play a certain buffering role between the carburizing fixture and the head of the press machine when the head of the press machine is pressed down, so as to protect the carburizing fixture and prolong the service life of the carburizing fixture.

[0033] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0035] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly contacted through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature. It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this paper are only for illustrative purposes, and are not the only embodiment.

Claims

1. A carburizing fixture, characterized by: The mold body is a hollow columnar structure, and has opposite inner and outer diameter surfaces. The outer diameter surface is provided with a plurality of grooves parallel to the axial direction of the mold body, and is used to support the inner wall of the ring. The width of the mold body is greater than or equal to the width of the ring.

2. A carburizing fixture according to claim 1, wherein: The outer diameter surface is provided with at least one annular groove along the circumferential direction.

3. A carburizing fixture according to claim 2, wherein: The annular groove is provided with two.

4. A carburizing fixture according to any one of claims 1-3, characterized in that: The carburizing mold is provided with an auxiliary gasket, and the inner diameter of the auxiliary gasket is greater than the outer diameter of the mold body and smaller than the outer diameter of the end surface of the ring.

5. A carburizing fixture according to any one of claims 1-3, characterized in that: The grooves have arc surfaces recessed towards the axis of the mold body.

6. A carburizing fixture according to any one of claims 1-3, characterized in that: The carburizing mold is provided with a gasket, and at least part of the end surface of the gasket is in contact with the end surface of the mold body when the gasket is coaxially arranged on one side of the mold body.

7. A carburizing fixture according to claim 6, wherein: The inner diameter of the gasket is equal to the inner diameter of the mold body, and the outer diameter of the gasket is smaller than or equal to the outer diameter of the mold body.

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