Secondary quenching device and method

Abstract

The invention relates to the technical field of secondary quenching, in particular to a secondary quenching device and method.The secondary quenching device is characterized in that a mold body is of a hollow columnar structure and is provided with an inner diameter surface and an outer diameter surface which are opposite, and the outer diameter surface is provided with a plurality of grooves parallel to the axial direction of the mold body and used for supporting the inner wall of a ferrule; the width height of the mould body is greater than or equal to that of the ferrule; the inner diameter of the auxiliary gasket is larger than the outer diameter of the clamping fixture body and smaller than the outer diameter of the end face of the ferrule. The secondary quenching equipment comprises a machine body with a cavity, a driving device installed on the machine body, a transmission assembly connected with the driving device and a plurality of rollers connected with the transmission assembly. The cavity is used for containing a cooling quenching oil medium, and the rollers are arranged at the bottom of the cavity in parallel. According to the secondary quenching device, the ferrule can rotate in the cooling quenching oil medium and is subjected to secondary quenching, so that the ferrule and the cooling quenching oil medium are more fully contacted, and the secondary quenching effect and the secondary quenching efficiency are favorably improved.

Description

Technical Field

[0001] The invention relates to the technical field of secondary quenching, and in particular to a secondary quenching device and method. Background Art

[0002] At present, the secondary quenching cooling in the heat treatment process of carburized steel bearing rings is completed in quenching oil. During cooling, a jig is required to support the inner surface of the ring to control dimensional expansion and contraction and deformation during the process. Specifically, a carburizing jig is installed inside the carburized steel bearing ring to support the inner diameter of the ring. The ring with the carburizing jig is then placed inside a device containing a cooling quenching oil medium. Usually, stirring blades are provided inside the device to make the cooling quenching oil medium flow and contact the surface of the metal ring. During this process, since the carburizing jig installed on the ring has claws, the ring can only be stationary in the cooling quenching oil medium, and the ring and the cooling quenching oil medium cannot fully contact, resulting in poor secondary quenching cooling. Summary of the invention

[0003] In view of the defects of the prior art, the present invention provides a secondary quenching device and method, which includes a special carburizing mold and secondary quenching equipment, so that the ring equipped with the carburizing mold can be placed in a cooling quenching oil medium for self-rotation. After the secondary quenching, the carburizing mold without claws can be removed from the ring with the help of an auxiliary gasket, thereby improving the secondary quenching effect and facilitating operation.

[0004] In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is a secondary quenching device, which includes a mold body, an auxiliary gasket and a secondary quenching device; the mold body is a hollow cylindrical structure, the mold body has an inner diameter surface and an outer diameter surface opposite to each other, the outer diameter surface is provided with a plurality of grooves parallel to the axial direction of the mold body, the outer diameter surface is used to support the inner wall of the ring, and the width of the mold body is greater than or equal to the width of the ring; the inner diameter of the auxiliary gasket is greater than the outer diameter of the mold body and smaller than the end face outer diameter of the ring; the secondary quenching device includes a body with a cavity, a driving device installed on the body, a transmission assembly connected to the driving device, and a plurality of rollers connected to the transmission assembly; the cavity is used to accommodate a cooling quenching oil medium, and the plurality of rollers are arranged parallel to each other at the bottom of the cavity.

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

[0006] Furthermore, two annular grooves are provided.

[0007] Furthermore, the groove of the tire body has an arc surface that is concave toward the axis of the tire body.

[0008] Furthermore, the secondary quenching device comprises a washer, and when the washer is coaxially arranged on one side of the mold body, at least a portion of the end surface of the washer contacts with the end surface of the mold body.

[0009] Furthermore, the inner diameter of the gasket is equal to the inner diameter of the tire body, and the outer diameter of the gasket is less than or equal to the outer diameter of the tire body.

[0010] Furthermore, the transmission assembly includes a row of upper gears and a row of lower gears that are offset from each other, the driving device is connected to the lower gears, the lower gears are meshed with the upper gears, and the upper gears are connected to the rollers.

[0011] The secondary quenching method using the secondary quenching device comprises the following steps: S100, installing a tire body on the inner side of the ferrule so that the outer diameter surface of the tire body supports the inner wall of the ferrule; S200, placing the ferrule with the tire body installed between two adjacent rollers rotating in the same direction, so that the axis of the ferrule is parallel to the rollers; S300, the cavity is filled with cooling quenching oil medium, the ferrule with the mold body installed is immersed in the cooling quenching oil medium, the driving device is turned on, and the roller is driven to rotate through the transmission component, so that the ferrule rotates and cools in the cooling quenching oil medium.

[0012] Furthermore, the steps also include S400, taking out the ferrule after secondary quenching; S500, placing the auxiliary gasket on the lower part of one end surface of the ferrule, and aligning the head of the press machine with the mold body; S600, the head of the press presses down the tire body to separate the tire body from the inner side of the ring.

[0013] Furthermore, step S500 also includes placing a gasket on the upper part of the mold body.

[0014] The beneficial effects of the present invention are as follows: the ferrule can be rotated and cooled in the cooling quenching oil medium, thereby promoting more complete contact between the ferrule and the oil medium, which is beneficial to improving the cooling effect and ensuring the hardness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a tire body in one embodiment of the present invention; Figure 2 is a cross-sectional view of a tire body in one embodiment of the present invention; Figure 3 A diagram showing the use state of the mold body in one embodiment of the present invention (when the carburizing mold is removed); Figure 4 A diagram showing the use state of the mold body in another embodiment of the present invention (during secondary quenching); Figure 5 It is a structural schematic diagram of a secondary quenching device in one embodiment of the present invention; Figure 6 A top view of a secondary quenching device in one embodiment of the present invention; Figure 7 It is a structural schematic diagram of a transmission assembly in one embodiment of the present invention; Figure 8 A cross-sectional view of a secondary quenching device in one embodiment of the present invention; Fig. 9 A top view of a secondary quenching device in use in one embodiment of the present invention; Fig.10 A diagram showing the use status of the secondary quenching equipment in one embodiment of the present invention (during secondary quenching); In the figure: 100, tire body, 110, inner diameter surface, 120, outer diameter surface, 121, groove, 1211, cambered surface, 122, annular groove, 200, auxiliary gasket, 300, secondary quenching equipment, 310, fuselage, 311, cavity, 320, driving device, 321, driving pulley, 330, transmission assembly, 331, upper gear, 332, lower gear, 333, driven pulley, 334, belt, 340, roller, 400, washer, 10. Ring. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0017] See also Figure 1-Figure 8 , shows a secondary quenching device in an embodiment of the present invention, which includes a mold body 100, an auxiliary gasket 200 and a secondary quenching device 300; the mold body 100 is used to support the inner wall of the ring 10, the secondary quenching device 300 is used to perform secondary quenching on the ring 10 installed with the mold body 100, and the auxiliary gasket 200 is used to cooperate with a press to remove the mold body 100 installed on the ring 10.

[0018] See also Figure 1, Figure 2 and Figure 3 The mold body 100 is a hollow cylindrical structure. The mold body 100 has an inner diameter surface 110 and an outer diameter surface 120 that are opposite to each other. The outer diameter surface 120 is provided with a plurality of grooves 121 parallel to the axial direction of the mold body 100. The outer diameter surface 120 is used to support the inner wall of the ring 10. The width of the mold body 100 is greater than or equal to the width of the ring 10. In this embodiment, the width of the mold body 100 is equal to the width of the ring 10, so that the mold body 100 can fully support the inner wall of the ring 10 except for the position where the grooves 121 are set.

[0019] See also Figure 4 The inner diameter of the auxiliary washer 200 is larger than the outer diameter of the mold body 100 and smaller than the outer diameter of the end face of the ferrule 10. With this arrangement, when the die head of the press presses the mold body 100, the mold body 100 and the auxiliary washer 200 do not interfere with each other, and the mold body 100 can be separated from the inner side of the ferrule 10.

[0020] See also Figure 5-Figure 8 The secondary quenching equipment 300 includes a body 310 having a cavity 311, a driving device 320 installed on the body 310, a transmission assembly 330 connected to the driving device 320, and a plurality of rollers 340 connected to the transmission assembly 330; the cavity 311 is used to accommodate a cooling quenching oil medium, and the plurality of rollers 340 are arranged parallel to each other at the bottom of the cavity 311.

[0021] like Fig. 9 and Fig.10 As shown, when in use, the ring 10 is placed between adjacent parallel rollers 340, the driving device 320 is started, the driving device 320 drives the transmission assembly 330, and drives multiple rollers 340 to rotate, and then the ring 10 rotates under the action of friction. During the rotation process, it continuously contacts the cooling quenching oil medium for secondary quenching.

[0022] It should be noted that in order to facilitate the removal of the jig from the inside of the ferrule 10 after the secondary quenching is completed, the jig in the prior art will be provided with a base and at least two connecting ears / claws on one side end face of the columnar carburizing jig. In order to facilitate the application of force, after the carburizing jig is installed, the connecting ears / claws will exceed the outer diameter of the ferrule 10. Due to the existence of the connecting ears / claws, the ferrule 10 can only be placed in the oil medium at a stationary state, and the ferrule 10 itself cannot roll. If rolling occurs, the connecting ears / claws will interfere with and collide with the internal structure of the secondary quenching machine. Therefore, the cooling quenching oil medium is usually stirred to make the cooling quenching oil medium contact with the ferrule 10. Since the ferrule 10 is stationary during this process, the medium may not be able to fully contact the ferrule 10. Figure 4As shown, in this embodiment, an auxiliary gasket 200 is provided in the disassembly link, which plays an auxiliary role when the ferrule 10 is removed from the carburizing mold. When in use, the end face of the ferrule 10 equipped with the mold body 100 is placed on the auxiliary gasket 200, and the press applies downward pressure to the middle mold body 100 to remove the carburizing mold from the inner side of the ferrule 10. Due to the participation of the press, it is more time-saving and labor-saving, and the efficiency is improved. In addition, during the secondary quenching process, the mold body 100 is completely installed in the inner side of the ferrule 10, without protruding connecting ears / feed claws, and there is no protruding part outside the mold body 100 and the part beyond the outer diameter of the ferrule 10, which is convenient for using the roller 340 rotating inside the quenching machine to drive the ferrule 10 to rotate. Secondary quenching is performed during the rotation process, which can make the contact between the ferrule 10 and the cooling quenching oil medium more sufficient, which is conducive to improving the cooling effect and efficiency. In the specific setting, the roller 340 is made of round steel. In addition, in order to prevent the ring 10 from tilting, a hook can be used to auxiliaryly hang the ring 10 from above. The hook and the ring 10 can slide relatively, and only play a certain limiting role.

[0023] See also Figure 2 In one embodiment, at least one annular groove 122 is formed along the circumferential direction on the outer diameter surface of the mold body 100. The annular groove 122 is an oil groove, which allows oil to flow in the carburizing mold to accelerate the cooling speed.

[0024] Preferably, in one embodiment, two annular grooves 122 are provided.

[0025] See also Figure 1 In one embodiment, the groove 121 of the mold body 100 has an arc surface 1211 that is recessed toward the axis of the mold body 100. The groove 121 can provide a channel for the cooling quenching oil medium to flow, and the recessed arc surface 1211 can expand to the cross-sectional area of ​​the channel, which is conducive to the full contact between the cooling quenching oil medium and the ferrule, and optimizes the secondary quenching effect.

[0026] In one embodiment, the secondary quenching device includes a washer 400 . When the washer 400 is coaxially disposed on one side of the mold body 100 , at least a portion of the end surface of the washer 400 contacts the end surface of the mold body 100 .

[0027] In one embodiment, the inner diameter of the washer 400 is equal to the inner diameter of the mold body 100, and the outer diameter of the washer 400 is less than or equal to the outer diameter of the mold body 100. The auxiliary washer 200 and the washer 400 are both made of low-carbon bearing steel. A press is used to press on the protruding washer 400, so that the carburized mold 100 that has been shrunk and imprisoned on the bearing inner ring 10 can be detached and enter the auxiliary washer 200.

[0028] See also Figure 5 and Figure 7In one embodiment, the transmission assembly 330 includes a row of upper gears 331 and a row of lower gears 332 that are staggered from each other. The driving device 320 is connected to the lower gears 332. The lower gears 332 and the upper gears 331 are meshed with each other. The upper gears 331 are connected to the rollers 340. In the specific configuration, a driving pulley 321 is provided on the main shaft of the driving device 320. The driving pulley 321 is connected to a passive pulley 333 through a belt 334. The passive pulley 333 is coaxially connected to one of the lower gears 332. The lower gears 332 are meshed with the upper gears 331. The rotation of the main shaft drives the driving pulley 321 and the passive pulley 333 to rotate, and then the rotation of the lower gear 332 drives the upper gear 331 to rotate, and the rollers 340 drive the ring 10 to rotate.

[0029] See also Figure 1-Figure 10 The secondary quenching method using the secondary quenching device comprises the following steps: Step S100: Figure 3 As shown, the tire body 100 is installed on the inner side of the ferrule 10 so that the outer diameter surface of the tire body 100 supports the inner wall of the ferrule 10; Step S200, see Fig. 9 and Fig.10 , placing the ferrule 10 with the tire body 100 installed between two adjacent rollers 340 rotating in the same direction, so that the axis of the ferrule 10 is parallel to the roller 340; In step S300, the cavity 311 is filled with cooling quenching oil medium, the ring 10 with the mold body 100 installed is immersed in the cooling quenching oil medium, the driving device 320 is turned on, and the roller 340 is driven to rotate through the transmission assembly 330, so that the ring 10 rotates in the cooling quenching oil medium and is quenched again.

[0030] Furthermore, in one embodiment, the steps further include Step S400, taking out the cooled ferrule 10; Step S500: Figure 4 As shown, the auxiliary gasket 200 is placed on the lower part of one end surface of the ring 10, and the head of the press machine is aligned with the tire body 100; Step S600 : The head of the press presses down the mold body 100 to separate the mold body 100 from the inner side of the ferrule 10 .

[0031] Furthermore, in one embodiment, step S500 also includes placing a gasket 400 on the upper portion of the ferrule 10 .

[0032] The secondary quenching method adopts a unique secondary quenching device to enable the ring 10 to rotate and be secondary quenched in the cooling quenching oil medium, thereby promoting more complete contact between the ring 10 and the cooling quenching oil medium, which is beneficial to improving the secondary quenching effect and secondary quenching efficiency.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

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

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

Claims

1. Secondary quenching device, characterized in that: include The tire body is a hollow cylindrical structure, the tire body has an inner diameter surface and an outer diameter surface opposite to each other, the outer diameter surface is provided with a plurality of grooves parallel to the axial direction of the tire body, the outer diameter surface is used to support the inner wall of the ring, and the width of the tire body is greater than or equal to the width of the ring; An auxiliary washer, the inner diameter of which is larger than the outer diameter of the tire body and smaller than the outer diameter of the end face of the ferrule; A secondary quenching device comprises a body having a cavity, a driving device mounted on the body, a transmission assembly connected to the driving device, and a plurality of rollers connected to the transmission assembly; The cavity is used to contain cooling quenching oil medium, and the plurality of rollers are arranged parallel to each other at the bottom of the cavity.

2. The secondary quenching device according to claim 1, characterized in that: The outer diameter surface of the mold body is provided with at least one annular groove along the circumferential direction.

3. The secondary quenching device according to claim 2, characterized in that: The annular grooves are provided with two.

4. The secondary quenching device according to claim 1, characterized in that: The groove of the tire body has an arc surface that is concave toward the axis of the tire body.

5. The secondary quenching device according to claim 1, characterized in that: The secondary quenching device comprises a washer. When the washer is coaxially arranged on one side of the mold body, at least a portion of the end surface of the washer contacts the end surface of the mold body.

6. The secondary quenching device according to claim 5, characterized in that: The inner diameter of the gasket is equal to the inner diameter of the tire body, and the outer diameter of the gasket is less than or equal to the outer diameter of the tire body.

7. The secondary quenching device according to claim 1, characterized in that: The transmission assembly comprises a row of upper gears and a row of lower gears which are offset from each other, the driving device is connected to the lower gears, the lower gears are meshed with the upper gears, and the upper gears are connected to the rollers.

8. A secondary quenching method using the secondary quenching device according to claims 1 to 7, characterized in that: Steps include S100, installing a tire body on the inner side of the ferrule so that the outer diameter surface of the tire body supports the inner wall of the ferrule; S200, placing the ferrule with the tire body installed between two adjacent rollers rotating in the same direction, so that the axis of the ferrule is parallel to the rollers; S300, the cavity is filled with cooling quenching oil medium, the ferrule with the mold body installed is immersed in the cooling quenching oil medium, the driving device is turned on, and the roller is driven to rotate through the transmission component, so that the ferrule rotates in the cooling quenching oil medium and is quenched twice.

9. The secondary quenching method according to claim 8, characterized in that: The steps also include S400, taking out the ferrule after secondary quenching; S500, placing the auxiliary gasket on the lower part of one end surface of the ferrule, and aligning the head of the press machine with the mold body; S600, the head of the press presses down the tire body to separate the tire body from the inner side of the ring.

10. The secondary quenching method according to claim 9, characterized in that: Step S500 also includes placing a gasket on the upper portion of the mold body.

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