Supporting tool for heat treatment charging of spiral bevel gear and heat treatment system

Abstract

A supporting tool for heat treatment charging of a spiral bevel gear and a heat treatment system relate to the technical field of gear processing, and comprise a supporting piece, and the supporting piece is provided with a positioning hole and a plurality of lightening holes. The supporting piece is provided with a first supporting end face and a second supporting end face which are oppositely arranged in the axial direction of the positioning hole. The two ends of the lightening hole are located in the first supporting end face and the second supporting end face respectively. The positioning holes are used for inserting the steps; one of the first supporting end face and the second supporting end face is selected to be in contact with the back conical face so as to support the spiral bevel gear body. According to the structural design, the contact area with the spiral bevel gear body can be increased, high-temperature creep deformation of the end face of the bevel gear after heat treatment is reduced, and quenching stress is reduced, so that jumping of the end face of the bevel gear meets technical requirements, and product quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear machining technical field, specifically, relate to a kind of spiral bevel gear heat treatment is loaded into furnace with supporting tool and heat treatment system. BACKGROUND

[0002] In prior art, in order to realize better transmission, some gearboxes are provided with spiral bevel gears, the spiral bevel gear has bevel gear end face and back taper surface opposite to bevel gear end face, and the bevel gear end face is machined with conical tooth body. During spiral bevel gear machining process, heat treatment is needed, and during heat treatment process, spiral bevel gear needs to be supported by supporting tool and placed in heating furnace.

[0003] The inventor found in research that the supporting tool for supporting spiral bevel gear for heat treatment in prior art has at least the following disadvantages:

[0004] The top of the supporting tool is provided with three supporting columns, and the three supporting columns cooperate to support the back taper surface of the spiral bevel gear, so that three-point support positioning is realized. Due to the multi-point support, the supporting area is small, and after heat treatment, carburizing quenching and tempering of the spiral bevel gear, the runout of the bevel gear end face is large, exceeding the finish machining allowance, which does not meet the technical requirements of the product. UTILITY MODEL CONTENTS

[0005] The utility model aims to, for example, provide a kind of spiral bevel gear heat treatment is loaded into furnace with supporting tool and heat treatment system, which can increase the contact area with spiral bevel gear body, reduce the high temperature creep of bevel gear end face after heat treatment, reduce quenching stress, so that the runout of bevel gear end face meets the technical requirements, and improve product quality.

[0006] Embodiments of the utility model can be implemented as follows:

[0007] In a first aspect, the utility model provides a kind of spiral bevel gear heat treatment is loaded into furnace with supporting tool, for positioning spiral bevel gear body, the spiral bevel gear body has opposite bevel gear end face and back taper surface, and the back taper surface is provided with step, comprising:

[0008] Supporting piece, the supporting piece is provided with positioning hole and multiple lightening holes;The supporting piece has first support end face and second support end face oppositely arranged in the axial direction of the positioning hole, and the two ends of the lightening hole are located on the first support end face and the second support end face respectively;

[0009] The positioning hole is used for inserting the step;The first support end face and the second support end face are alternatively used to contact with the back taper surface to support the spiral bevel gear body.

[0010] In an optional embodiment, the positioning hole comprises a first hole section and a second hole section connected to each other, a hole diameter of the first hole section is smaller than a hole diameter of the second hole section, an end surface of the first hole section away from the second hole section is located on the first support end surface, and an end surface of the second hole section away from the first hole section is located on the second support end surface.

[0011] In an optional embodiment, the first hole section, the second hole section and the positioning hole are coaxially arranged, a hole wall of the first hole section and a hole wall of the second hole section are connected by an annular surface, and ports of some of the plurality of lightening holes extend to the annular surface.

[0012] In an optional embodiment, the support tool for loading bevel gear into a heat treatment furnace further comprises a first reinforcing ring plate, a second reinforcing ring plate and a third reinforcing ring plate, the first reinforcing ring plate is sleeved on the outer side of the support member, the second reinforcing ring plate is embedded in the first hole section, and the third reinforcing ring plate is embedded in the second hole section.

[0013] In an optional embodiment, the support member, the first reinforcing ring plate, the second reinforcing ring plate and the third reinforcing ring plate are arranged in an integrated structure.

[0014] In an optional embodiment, at least one of the first reinforcing ring plate, the second reinforcing ring plate and the third reinforcing ring plate is provided with a concave-convex part concave or convex in the radial direction of the positioning hole.

[0015] In an optional embodiment, the first hole section has a first port communicating with the second hole section and a second port located on the first support end surface, and a hole diameter of the first hole section gradually decreases in a direction from the first port to the second port.

[0016] In an optional embodiment, the lightening hole is arranged in at least one of a polygonal hole, a circular hole and an elliptical hole.

[0017] In a second aspect, the utility model provides a heat treatment system, the heat treatment system comprises:

[0018] The support tool for loading bevel gear into a heat treatment furnace.

[0019] In an optional embodiment, the heat treatment system further comprises a heating furnace and a spacer frame, and a plurality of the support members are arranged in a stack and are all supported by the spacer frame.

[0020] The beneficial effects of the embodiments of the utility model include, for example:

[0021] In summary, the supporting tool for heat treatment furnace loading of bevel gear provided by the embodiment supports the bevel gear body by the supporting member, and the first supporting end face is supported on the workbench or other support, and the second supporting end face faces upward, then the step of the bevel gear body faces downward, and the bevel gear body is hoisted on the supporting member, and the step is inserted into the positioning hole, so that the interference between the supporting member and the step is avoided, the back cone surface of the bevel gear body can contact the second supporting end face, the bevel gear body and the second contact end face are in surface contact, the contact area is large, the support is stable and reliable, the creep of the part under high temperature and the quenching stress during quenching are reduced, the end jump of the bevel gear body meets the technical requirements, and the product quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiments, it should be understood, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0023] Figure 1 It is a sectional view of the bevel gear body.

[0024] Figure 2 It is a schematic view of the supporting tool for heat treatment furnace loading of bevel gear of the embodiment of the application.

[0025] Figure 3 It is a sectional schematic view of the supporting tool for heat treatment furnace loading of bevel gear of the embodiment of the application.

[0026] Figure 4 It is a schematic view of the isolation frame of the embodiment of the application.

[0027] Icon:

[0028] 001-bevel gear body;011-bevel gear end face;012-back cone surface;013-step;100-supporting member;110-positioning hole;111-first hole section;112-second hole section;120-weight reduction hole;130-first supporting end face;140-second supporting end face;200-first reinforcing ring plate;210-first groove;300-second reinforcing ring plate;400-third reinforcing ring plate;410-second groove;500-isolation frame;510-center column;520-I-shaped framework. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the utility model protection.

[0031] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the utility model, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product is usually placed, which is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0033] In addition, if the terms "first", "second" and the like appear, they are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0034] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0035] In the prior art, when heat treating bevel gears, a support frame is used to support on the back cone surface 012 of the bevel gear in a three-point support form. Since the contact area is small, the stability of the support is not high, and the gravity of the bevel gear is concentrated on the support point, the stress is uneven, after heat treatment, carburizing quenching and tempering, the bevel gear end face 011 jumps greatly, exceeding the finish machining allowance, which does not meet the technical requirements of the product.

[0036] In view of this, the designer provides a bevel gear heat treatment furnace loading support tool, which can increase the support surface, improve the support stability, reduce the end face jump and improve the product machining quality.

[0037] Please refer to Figure 1It should be noted that the support tool for furnace loading of the spiral bevel gear heat treatment is mainly used for positioning the spiral bevel gear body 001, so that the spiral bevel gear body 001 can smoothly perform quenching and tempering heat treatment, and the deformation after heat treatment is small, which meets the technical requirements, is beneficial to subsequent finishing, and ensures product quality. The spiral bevel gear body 001 has opposite bevel gear end faces 011 and back tapered surfaces 012, the back tapered surfaces 012 are provided with steps 013, the steps 013 are generally cylindrical, and the steps 013 are coaxially arranged with the bevel gear end faces 011 and the back tapered surfaces 012. In addition, the middle position of the spiral bevel gear body 001 is provided with a hole, so that the spiral bevel gear body 001 is a hollow structure.

[0038] In the embodiment, the support tool for furnace loading of the spiral bevel gear heat treatment includes a support piece 100, and the support piece 100 is provided with a positioning hole 110 and a plurality of lightening holes 120. The support piece 100 has a first support end face 130 and a second support end face 140 arranged opposite in the axial direction of the positioning hole 110, and the two ends of the lightening hole 120 are located on the first support end face 130 and the second support end face 140 respectively; the positioning hole 110 is used for inserting the step 013; and the first support end face 130 and the second support end face 140 are alternatively used for contacting the back tapered surface 012 to support the spiral bevel gear body 001.

[0039] As described above, the use mode of the support tool for furnace loading of the spiral bevel gear heat treatment provided in the embodiment is as follows:

[0040] In use, the first support end face 130 can be used to contact the ground or other positions to position the support piece 100 in the heating furnace, and at the same time, the second support end face 140 faces upward. Then, the spiral bevel gear body 001 is lifted by hoisting equipment, so that the step 013 of the spiral bevel gear body 001 faces downward and is placed toward the support piece 100. In this process, the step 013 is inserted into the positioning hole 110 on the support piece 100, so that the support piece 100 does not interfere with the step 013. With the increase of the insertion depth of the step 013, the back tapered surface 012 of the spiral bevel gear body 001 can contact the second support end face 140. The spiral bevel gear body 001 and the second contact end face are in surface contact, the contact area is large, the support is stable and reliable, the creep of the part at high temperature and the quenching stress during quenching can be reduced, the end jump of the spiral bevel gear body 001 meets the technical requirements, and the product quality is ensured.

[0041] At the same time, since the support piece 100 is provided with a plurality of lightening holes 120, the weight of the support piece 100 is reduced, the material is saved, and the support piece 100 is prevented from changing into a spherical shape when heated, so as to affect the stability and reliability of the support.

[0042] The following embodiments illustrate the details of the support tool for furnace loading of the spiral bevel gear heat treatment of the present application by way of example.

[0043] Please refer to Figure 2 and Figure 3 In this embodiment, optionally, the support tool for bevel gear heat treatment furnace loading comprises a support piece 100, a first reinforcing ring plate 200, a second reinforcing ring plate 300, and a third reinforcing ring plate 400, which are integrally formed. The first reinforcing ring plate 200, the second reinforcing ring plate 300, and the third reinforcing ring plate 400 cooperate with the support piece 100 to reinforce the support piece 100, improve the stability and reliability of the structure of the support piece 100, and avoid deformation during use, which affects the stability of the bevel gear body 001.

[0044] Because the support piece 100, the first reinforcing ring plate 200, the second reinforcing ring plate 300, and the third reinforcing ring plate 400 are integrally formed, the structural strength is higher, which is beneficial to batch processing and manufacturing. For example, in this embodiment, the support piece 100, the first reinforcing ring plate 200, the second reinforcing ring plate 300, and the third reinforcing ring plate 400 can be integrally formed by casting process.

[0045] In this embodiment, optionally, the support piece 100 is provided with a positioning hole 110 and a plurality of weight reduction holes 120. The support piece 100 has a first support end face 130 and a second support end face 140 arranged opposite in the axial direction of the positioning hole 110, and the two ends of the weight reduction hole 120 are located on the first support end face 130 and the second support end face 140, respectively.

[0046] The positioning hole 110 can be a circular hole, a stepped hole, or other shaped hole, which is convenient for inserting the step 013 on the bevel gear body 001. The weight reduction hole 120 can be at least one of a polygonal hole, a circular hole, and an elliptical hole. For example, in this embodiment, the weight reduction hole 120 is provided as a regular hexagonal hole, and a plurality of weight reduction holes 120 form a honeycomb arrangement, which is stable in structure and good in support effect.

[0047] Optionally, in this embodiment, the positioning hole 110 is provided as a stepped hole, and the positioning hole 110 comprises a first hole section 111 and a second hole section 112 which are communicated and coaxially arranged. The hole diameter of the first hole section 111 is smaller than that of the second hole section 112, and the hole wall of the first hole section 111 and the hole wall of the second hole section 112 are connected by an annular surface. The ports of some of the plurality of weight reduction holes 120 extend to the annular surface. The end face of the first hole section 111 away from the second hole section 112 is located on the first support end face 130, and the end face of the second hole section 112 away from the first hole section 111 is located on the second support end face 140. That is, the first hole section 111 is designed close to the first support end face 130, and the second hole section 112 is designed close to the second support end face 140.

[0048] By setting the positioning hole 110 as a stepped hole, the support positioning of bevel gear bodies 001 of different sizes can be adapted. For example, when the step 013 of the bevel gear body 001 has a larger outer diameter, it cannot be inserted into the first hole section 111. At this time, the first support end surface 130 is used as the bottom surface, the second support end surface 140 is used as the top surface, the step 013 is inserted into the second hole section 112, and the second support end surface 140 is used to contact the back cone surface 012 of the bevel gear body 001. When the step 013 of the bevel gear body 001 has an outer diameter that is suitable for the diameter of the second hole section 112, the second support end surface 140 can be used as the bottom surface, the first support end surface 130 can be used as the top surface, the step 013 can be inserted into the first hole section 111, and obviously the step 013 can also extend into the second hole section 112, and the first support end surface 130 can be used to contact the back cone surface 012 of the bevel gear body 001.

[0049] Alternatively, in some embodiments, the step 013 can also be inserted into the first hole section 111 from the second hole section 112 to support and position the bevel gear body 001.

[0050] To avoid interference between the step 013 and the annular surface when the step 013 is inserted into the first hole section 111 from the second hole section 112, the first hole section 111 can be set as a tapered hole section. For example, the first hole section 111 has a first port connected to the second hole section 112 and a second port located on the first support end surface 130, and the hole diameter of the first hole section 111 gradually decreases in the direction from the first port to the second port. In this way, the port diameter of the first hole section 111 connected to the second hole section 112 is larger, which can guide the step 013 into the first hole section 111 and reduce the assembly difficulty.

[0051] In this embodiment, optionally, the first reinforcing ring plate 200 is sleeved on the outer side of the support 100, the second reinforcing ring plate 300 is embedded in the first hole section 111, the second reinforcing ring plate 300 contacts the hole wall of the first hole section 111, and the third reinforcing ring plate 400 is embedded in the second hole section 112, and the third reinforcing ring plate 400 contacts the hole wall of the second hole section 112.

[0052] By setting the first reinforcing ring plate 200, the second reinforcing ring plate 300, and the third reinforcing ring plate 400 on the periphery and the inner ring of the support 100, and by designing them as an integral type, the overall structural strength is high, deformation is not easy, and the service life is long.

[0053] Optionally, to further improve the strength of the overall structure, a concave-convex part recessed or protruded in the radial direction of the positioning hole 110 is formed on at least one of the first reinforcing ring plate 200, the second reinforcing ring plate 300 and the third reinforcing ring plate 400. For example, in the embodiment, the outer circumferential surface of the first reinforcing ring plate 200 is formed with a first groove 210 recessed inward in the radial direction of the positioning hole 110, and the inner circumferential surface of the third reinforcing ring plate 400 is formed with a second groove 410 recessed outward in the radial direction of the positioning hole 110.

[0054] The support tool for loading bevel gear into furnace for heat treatment and the heat treatment system provided by the embodiment can support the bevel gear body 001 by inserting the step 013 into the first hole segment 111 or the second hole segment 112 as needed, adapt to the support and positioning of bevel gear bodies 001 of different sizes, and have a wide range of use. Moreover, the first support end surface 130 or the second support end surface 140 is in contact with the back cone surface 012 of the bevel gear body 001, the contact area is increased, and the support stability is improved.

[0055] Please refer to Figure 4 The embodiment further provides a heat treatment system. The heat treatment system comprises a heating furnace, a separation frame 500 and a plurality of support tools for loading bevel gear into furnace for heat treatment.

[0056] The separation frame 500 comprises a center column 510 and a plurality of support units. Each support unit comprises a plurality of I-shaped skeletons 520. The center column 510 can be a cylinder. The outer circumferential surface of the center column 510 is provided with a plurality of insertion slots. Some of the insertion slots are located at the same height to form an insertion unit. The plurality of insertion units are arranged at intervals in the axial direction of the center column 510. The plurality of I-shaped skeletons 520 of each support unit are inserted into the insertion slots at the corresponding height. The I-shaped skeletons 520 are positioned by the center column 510. The support member 100 and the bevel gear body 001 are hoisted from above the center column 510 by hoisting equipment. The support member 100 and the bevel gear body 001 are both passed through the center column 510 and then fall on the corresponding I-shaped skeleton 520. The support member 100 is supported by the plurality of I-shaped skeletons 520 at the same height. In actual operation, when a plurality of bevel gear bodies 001 need to be heat treated, the I-shaped skeletons 520 can be installed from bottom to top in sequence. After the hoisting of the support member 100 on the I-shaped skeleton 520 at the lower layer is completed, the I-shaped skeleton 520 at the adjacent upper layer is installed, and then the hoisting of the support member 100 is performed. The operation is repeated in this way.

[0057] Obviously, after the heat treatment is completed, the support member 100 and the bevel gear body 001 are hoisted and removed from top to bottom in sequence.

[0058] It should be understood that the plurality of bevel gear bodies 001 are heat treated together, which improves efficiency and saves cost.

[0059] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A supporting tool for bevel gear heat treatment loading, used for positioning a bevel gear body (001), the bevel gear body (001) having opposite bevel gear end faces (011) and back cone faces (012), the back cone faces (012) being convexly provided with steps (013), characterized in that, The support tool (100) comprises a positioning hole (110) and a plurality of lightening holes (120); the support tool (100) has a first support end surface (130) and a second support end surface (140) arranged oppositely in the axial direction of the positioning hole (110), and two ends of the lightening holes (120) are located on the first support end surface (130) and the second support end surface (140) respectively. The positioning hole (110) is used for inserting the step (013); and the first support end surface (130) and the second support end surface (140) are alternatively used for contacting the back cone surface (012) to support the spiral bevel gear body (001).

2. The spiral bevel gear heat treatment loading support tool according to claim 1, wherein: the positioning hole (110) comprises a first hole section (111) and a second hole section (112) connected to each other, the first hole section (111) has a smaller hole diameter than the second hole section (112), an end surface of the first hole section (111) away from the second hole section (112) is located on the first support end surface (130), and an end surface of the second hole section (112) away from the first hole section (111) is located on the second support end surface (140).

3. The spiral bevel gear heat treatment loading support tool according to claim 2, wherein: the first hole section (111), the second hole section (112) and the positioning hole (110) are coaxially arranged; the hole wall of the first hole section (111) and the hole wall of the second hole section (112) are connected through an annular surface, and the ports of some of the plurality of lightening holes (120) extend to the annular surface.

4. The spiral bevel gear heat treatment loading support tool according to claim 2, wherein: the spiral bevel gear heat treatment loading support tool further comprises a first reinforcing ring plate (200), a second reinforcing ring plate (300) and a third reinforcing ring plate (400), the first reinforcing ring plate (200) is sleeved on the outer side of the support tool (100), the second reinforcing ring plate (300) is embedded in the first hole section (111), and the third reinforcing ring plate (400) is embedded in the second hole section (112).

5. The spiral bevel gear heat treatment loading support tool according to claim 4, wherein: the support tool (100), the first reinforcing ring plate (200), the second reinforcing ring plate (300) and the third reinforcing ring plate (400) are arranged in an integrated structure.

6. The spiral bevel gear heat treatment loading support tool according to claim 4, wherein: at least one of the first reinforcing ring plate (200), the second reinforcing ring plate (300) and the third reinforcing ring plate (400) has a concave-convex part recessed or protruding in the radial direction of the positioning hole (110).

7. The spiral bevel gear heat treatment loading support tool according to claim 4, wherein: ​ ​ ​ ​ ​ ​ The first hole section (111) has a first port communicating with the second hole section (112) and a second port located on the first support end face (130), and a hole diameter of the first hole section (111) gradually decreases in a direction from the first port to the second port.

8. The support tool for heat treatment of bevel gears according to any one of claims 1-7, characterized in that: The weight-reducing hole (120) is provided as at least one of a polygonal hole, a circular hole and an elliptical hole.

9. A thermal processing system, characterized by, The heat treatment system comprises: The support tool for heat treatment of bevel gears according to any one of claims 1-8.

10. The heat treatment system according to claim 9, characterized in that: The heat treatment system further comprises a heating furnace and a spacer frame (500), and a plurality of the support tools (100) are arranged in a stack and are supported by the spacer frame (500).

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