Carburizing anti-ellipse tool for large-diameter gear
By setting weight reduction holes on large-diameter gears and adopting multi-point penetration method, combined with the rectangular limit structure of support rods and limit plates, the problem of elliptical deformation of large-diameter gears during carburization is solved, and the stability and flatness of the gears are improved.
Patent Information
- Application Number
- CN202422034209.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-20
AI Technical Summary
Large-diameter gears are prone to deformation due to high temperature during carburization, resulting in an increase in ellipticity, affecting later processing and use.
A carburizing anti-elliptical tooling for large-diameter gears is designed. By setting weight reduction holes on the gears as piercing holes, and using a multi-point piercing method, combining multiple support rods and limiting plates to form a rectangular limiting structure to ensure that the tooling remains stable during carburizing.
It effectively prevents the elliptical deformation of large-diameter gears during carburization, reduces the weight bearing on each hole surface, and ensures the flatness and stability of the gears.
Smart Images
Figure CN222948441U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heat treatment equipment and relates to a carburizing anti-ovality tooling for large-diameter gears. Background Art
[0002] The carburizing of gear parts generally adopts the method of center hole hanging. For large diameter gears, due to the influence of high temperature during the high temperature stage of carburizing, large diameter gears are prone to deformation. Therefore, when the center hole hanging method is adopted, the ovality of the gear will increase, which will affect the later processing and use of the gear. However, in order to ensure the flatness of the gear, the carburizing of large diameter gear parts still needs to adopt the hanging method. In view of this, it is very necessary to develop a new hanging tool to prevent large diameter gears from elliptical deformation during carburizing. Utility Model Content
[0003] The utility model aims at the deficiencies of the prior art and provides a carburizing anti-oval tool for a large-diameter gear, which can prevent the large-diameter gear from being ovally deformed during carburizing.
[0004] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:
[0005] A carburizing anti-ovalization tooling for large-diameter gears, wherein the gears are provided with external teeth and a center hole, wherein one or more groups of weight-reducing holes distributed along the circumferential direction are provided between the external teeth and the center hole, and more than two weight-reducing holes are selected as hanging holes, and the selected weight-reducing holes are located on the same diameter of the gears, and support rods are respectively passed through the hanging holes, and a common limiting plate is respectively sleeved on both ends of the multiple support rods, the support rods are arranged in parallel, and the limiting plates are arranged perpendicular to the support rods, and the two ends of the support rods are placed on a tooling frame and the limiting plates are located on the inner side of the tooling frame.
[0006] In the above-mentioned carburizing anti-ovality tooling for large-diameter gears, the radial dimension of the support rod is smaller than the radial dimension of the hanging hole, and the limiting plate is provided with a limiting hole matched with the support rod.
[0007] In the above-mentioned carburizing anti-ovality tooling for large-diameter gears, when the selected weight-reducing holes have different radial dimensions, the hanging plane on the same horizontal plane can be obtained by reducing the end dimension of the support rod corresponding to the larger hole, and the hanging plane is the contact surface with the tooling frame.
[0008] In the above-mentioned carburizing anti-ovality tooling for large-diameter gears, a plurality of gears of the same specification are intermittently provided on the support rod, the support rod, the limit plate and the gear form a carburizing tooling unit, and a plurality of carburizing tooling units are intermittently placed on the tooling frame.
[0009] In the above-mentioned carburizing anti-ovality tooling for large-diameter gears, a plurality of notched grooves are arranged on the outer circumferential surface of the support rod, and the notched grooves are arranged axially through the support rod; preferably, the cross section of the support rod is formed by connecting four circular arc segments.
[0010] In the above-mentioned carburizing anti-ovality tooling for large-diameter gears, an outer limit plate and an inner limit plate are provided at the end of the support rod, and the inner side of the outer limit plate is abutted and connected with the outer side of the tooling frame, and the outer side of the inner limit plate is abutted and connected with the inner side of the tooling frame; preferably, the outer limit plate and the inner limit plate are coaxially arranged with the support rod, and preferably, the outer limit plate and the inner limit plate are integrally formed with the support rod.
[0011] In the above-mentioned carburizing anti-ovality tooling for large-diameter gears, a plurality of friction grooves are arranged on the tooling frame, and the friction grooves are arranged axially through the upper surface of the tooling frame, and the bottom of the support rod is in contact with the friction grooves.
[0012] In the above-mentioned carburizing anti-ovality tooling for large-diameter gears, the outer side of the limit plate is in contact and connected with the inner side of the inner limit plate or the tooling frame.
[0013] In the above-mentioned carburizing anti-ovality tooling for large-diameter gears, two weight-reducing holes are selected as the hanging holes, and the two selected weight-reducing holes have the same specifications and are symmetrically distributed relative to the center hole.
[0014] In the above-mentioned carburizing anti-ovality tooling for large-diameter gears, the tooling frames are provided in plurality and distributed up and down, the tooling frames are connected as a whole through a plurality of columns, and spacers are provided on the columns between adjacent tooling frames, and the bottoms of the columns are fixed on the base; further, the tooling frames are all rectangular frames, and sleeves cooperating with the columns are provided at the four corners thereof, and there are four columns.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] The utility model provides a carburizing anti-elliptical tooling for large-diameter gears, which uses the weight-reducing holes of the large-diameter gears as hanging holes, and adopts a multi-point hanging method to form multiple force points, which can greatly reduce the weight borne by each hole surface, so that almost no elliptical deformation will occur during the high-temperature stage of carburizing. At the same time, the utility model uses multiple support rods and a pair of limiting plates to form a rectangular limiting structure, which can keep the tooling stable during the carburizing of the gear. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a three-dimensional diagram of the utility model;
[0018] Figure 2 yes Figure 1 A partial enlarged view of
[0019] Figure 3 It is a planar structural diagram of a large diameter gear;
[0020] Figure numerals: 1. gear; 2. external teeth; 3. center hole; 4. weight-reducing hole; 5. hanging hole; 6. support rod; 7. limit plate; 8. tooling frame; 9. notch groove; 10. external limit plate; 11. internal limit plate; 12. friction groove; 13. column; 14. spacer; 15. base. DETAILED DESCRIPTION
[0021] The present invention will be further described below with reference to the accompanying drawings. Figure 1-3 :
[0022] A carburizing anti-ovality tooling for large-diameter gears, wherein the gear 1 is provided with an outer tooth 2 and a center hole 3, wherein one or more groups of weight-reducing holes 4 distributed in the circumferential direction are provided between the outer tooth 2 and the center hole 3, and more than two weight-reducing holes 4 are selected as hanging holes 5, and the selected weight-reducing holes 4 are located on the same diameter of the gear 1, and support rods 6 are respectively passed through the hanging holes 5, and a common limiting plate 7 is respectively sleeved on both ends of the plurality of support rods 6, the support rods 6 are arranged in parallel with each other, and the limiting plates 7 are arranged perpendicular to the support rods 6, and the two ends of the support rods 6 are placed on a tooling frame 8 and the limiting plates 7 are located on the inner side of the tooling frame 8; in order to carburize multiple gears 1 at the same time, multiple gears 1 of the same specification are passed through the support rod 6 at intervals, and the support rod 6, the limiting plates 7 and the gear 1 form a carburizing tooling unit, and multiple carburizing tooling units are placed on the tooling frame 8 at intervals.
[0023] The method of using this embodiment is: align the selected hanging hole 5 with the corresponding support rod 6, and insert the gears 1 in sequence. After all the gears 1 are inserted, the two limit plates 7 are respectively inserted into the two ends of the support rod 6, so that the multiple support rods 6 and a pair of limit plates 7 form a rectangular stable tooling structure, and the gear 1 is stably hung in the tooling structure. After that, the assembled carburizing tooling units are placed on the tooling frame 8 in sequence.
[0024] The radial dimension of the above-mentioned support rod 6 is slightly smaller than the radial dimension of the hanging hole 5, so that the gear 1 can be easily inserted without shaking. The limiting plate 7 is provided with a limiting hole matched with the support rod 6. Through the limiting hole, the limiting plate 7 is inserted into the support rod 6 to form a limiting structure to prevent the support rod 6 from moving relative to each other.
[0025] Compare with Figure 2A plurality of notched grooves 9 are provided on the outer peripheral surface of the support rod 6, and the notched grooves 9 are provided axially through the support rod 6; preferably, the cross section of the support rod 6 is formed by connecting four arc segments; by providing the notched grooves 9, the contact area between the support rod 6 and the hanging hole 5 can be reduced to facilitate the insertion and removal of the gear 1.
[0026] This embodiment further provides a variety of limiting structures to ensure that the tooling remains stable during carburizing:
[0027] The ends of the support rod 6 are provided with an outer limiting piece 10 and an inner limiting piece 11, the inner side of the outer limiting piece 10 is in contact with the outer side of the tooling frame 8, and the outer side of the inner limiting piece 11 is in contact with the inner side of the tooling frame 8; preferably, the outer limiting piece 10 and the inner limiting piece 11 are coaxially arranged with the support rod 6, and preferably, the outer limiting piece 10 and the inner limiting piece 11 are integrally formed with the support rod 6. The outer limiting piece 10 and the inner limiting piece and the tooling frame 8 form a limiting structure, which can prevent the support rod 6 from moving along the axial direction.
[0028] The tooling frame 8 is provided with a plurality of friction grooves 12, which are axially penetrated through the upper surface of the tooling frame 8, and the bottom of the support rod 6 is in contact with the friction groove 12; a limiting structure is formed between the support rod 6 and the friction groove 12 to prevent the support rod 6 from sliding.
[0029] The outer side of the above-mentioned limiting plate 7 is in contact with and connected to the inner side of the inner limiting piece 11 or the tooling frame 8 , and the limiting plate 7 and the inner side of the inner limiting piece 11 or the tooling frame 8 form a limiting structure.
[0030] In this example, the Figure 3 The hanging holes 5 select two weight-reducing holes 4 , and the two weight-reducing holes 4 selected have the same specifications and are symmetrically distributed relative to the center hole 3 .
[0031] Compare with Figure 1 The tooling racks 8 are provided with multiple and distributed up and down, and the tooling racks 8 are connected together by multiple columns 13. The columns 13 between adjacent tooling racks 8 are sleeved with spacers 14, and the bottoms of the columns 13 are fixed on the base 15; further, the tooling racks 8 are all rectangular frames, and the four corners thereof are respectively provided with sleeves that cooperate with the columns 13, and the columns 13 are provided with four. By providing multiple tooling racks 8, more gears 1 can be carburized at the same time.
[0032] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A carburizing anti-ovality tool for a large-diameter gear, wherein the gear (1) is provided with an outer tooth (2) and a center hole (3), and one or more groups of weight-reducing holes (4) distributed along the circumferential direction are provided between the outer tooth (2) and the center hole (3), characterized in that: More than two weight-reducing holes (4) are selected as hanging holes (5), the selected weight-reducing holes (4) are located on the same diameter of the gear (1), support rods (6) are respectively inserted into the hanging holes (5), and a common limiting plate (7) is respectively sleeved on both ends of the plurality of support rods (6), the support rods (6) are arranged in parallel with each other, and the limiting plate (7) is arranged perpendicular to the support rods (6), and the two ends of the support rods (6) are placed on a tooling frame (8) and the limiting plate (7) is located on the inner side of the tooling frame (8).
2. The carburizing anti-ovality tooling for large diameter gears according to claim 1, characterized in that: A plurality of gears (1) of the same specification are arranged at intervals on the support rod (6); the support rod (6), the limit plate (7) and the gear (1) form a carburizing fixture unit; and a plurality of carburizing fixture units are arranged at intervals on the fixture frame (8).
3. The carburizing anti-ovality tooling for large diameter gears according to claim 1, characterized in that: A plurality of notched grooves (9) are arranged on the outer peripheral surface of the support rod (6), and the notched grooves (9) are arranged to penetrate the support rod (6) along the axial direction.
4. The carburizing anti-ovality tooling for large diameter gears according to claim 1, characterized in that: An outer limiting piece (10) and an inner limiting piece (11) are provided at the end of the support rod (6); the inner side of the outer limiting piece (10) is in contact with the outer side of the tooling frame (8), and the outer side of the inner limiting piece (11) is in contact with the inner side of the tooling frame (8).
5. The carburizing anti-ovality tooling for large diameter gears according to claim 1, characterized in that: The tooling frame (8) is provided with a plurality of friction grooves (12), the friction grooves (12) being arranged to penetrate the upper surface of the tooling frame (8) along the axial direction, and the bottom of the support rod (6) is in contact with and connected to the friction grooves (12).
6. The carburizing anti-ovality tooling for large diameter gears according to claim 1, characterized in that: The hanging holes (5) are selected as two weight-reducing holes (4), and the two weight-reducing holes (4) are of the same specification and are symmetrically distributed relative to the central hole (3).
7. The carburizing anti-ovality tooling for large diameter gears according to claim 1, characterized in that: The tooling frames (8) are provided in plurality and distributed vertically. The tooling frames (8) are connected as a whole through a plurality of columns (13). Spacers (14) are sleeved on the columns (13) between adjacent tooling frames (8), and the bottoms of the columns (13) are fixed on the base (15).