A remanufacturing design method of double toothing standard wheel

Abstract

The application belongs to the field of gear design, and relates to a remanufacturing design method of a double mesh standard gear. Specifically, the single sharpening thickness is determined. The heat treatment carburized layer thickness of the double mesh standard gear is obtained, and the sharpening times are determined in combination with the carburized layer thickness and the single sharpening thickness. The method comprehensively considers factors such as design parameter limitations and conventional heat treatment carburized layer thickness, and finally obtains reasonable single sharpening thickness and sharpening times. The design parameters of the remanufactured double mesh standard gear are confirmed in combination with the single sharpening thickness and the sharpening times. The sharpening parameter table is obtained according to the single sharpening thickness and the sharpening times, and the double mesh standard gear is remanufactured according to the table. When the remanufactured double mesh standard gear is used, only fine adjustment according to the new center distance is needed. The method provides a reasonable design scheme for the remanufacturing of the double mesh standard gear, improves the utilization rate of the standard gear, reduces waste, and effectively reduces the use cost of the standard gear.

Description

Technical Field

[0001] This invention belongs to the field of gear design and relates to a remanufacturing design method for a double-meshing standard wheel. Background Technology

[0002] As global manufacturing becomes increasingly sophisticated, gear precision is gradually increasing. Corresponding to this precision is the accuracy of gear measurement, which determines the smoothness of gear transmission and the accuracy of motion transmission. Double-sided meshing inspection, as one of the main inspection methods for gear measurement, is based on the error kinematics theory of gear precision theory and can reflect the comprehensive result of deviations in various gear elements. The standard gear used for double-sided meshing inspection (hereinafter referred to as the double-meshing standard gear) is mainly used for double-sided meshing inspection of gears, checking only for burrs, dents, etc. Therefore, full contact within the effective tooth surface is sufficient, and tooth thickness is not strictly required.

[0003] The accuracy of a double-meshing standard wheel is generally three grades higher than that of the gear being tested. According to the accuracy grades specified in GB / T10095.2, if the gear being tested has an accuracy of grade 5 or higher, the accuracy of the measuring gear must be 1-2 grades higher; otherwise, measurement is impossible. Currently, commonly used gear accuracy grades are 5, 6, and 7, corresponding to double-meshing standard wheels of grades 4 and 5. During gear meshing testing, collisions, friction, and compression of the standard gear occur during entry, exit, and meshing transmission, directly causing the standard gear tooth profile to exceed tolerances and rendering it unusable. However, the manufacturing cost of grade 4 and 5 standard wheels is generally high, and scrapping them after a single instance of tooth profile exceeding tolerances would be a huge waste. Therefore, a remanufacturing design method for double-meshing standard wheels is urgently needed. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention aims to provide a remanufacturing design method for a double-meshing standard wheel. When remanufacturing a double-meshing standard wheel using this method, only minor adjustments are needed based on the new center distance. This provides a reasonable design scheme for the remanufacturing of double-meshing standard wheels, improves the utilization rate of standard wheels, and reduces waste.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] This invention discloses a remanufacturing design method for a double-meshing standard wheel, comprising the following steps:

[0007] Determine the thickness for a single grinding operation;

[0008] Obtain the heat-treated carburized layer thickness of the double-meshing standard wheel, and determine the number of grinding cycles by combining the carburized layer thickness and the thickness of a single grinding cycle.

[0009] The design parameters of the remanufactured double-meshing standard wheel are confirmed by combining the thickness of a single grinding and the number of grinding cycles.

[0010] The specific thickness for a single grinding cycle is determined as follows:

[0011] The thickness of a single grinding pass is determined based on the grinding accuracy of the machine tool and the tolerance range of standard gears (grades 4-6). The thickness of a single grinding pass shall not be less than the grinding accuracy of the machine tool.

[0012] The number of sharpening cycles is determined by combining the thickness of the carburized layer and the thickness of a single sharpening pass, as follows:

[0013] Obtain the heat-treated carburized layer thickness of the double-meshing standard wheel, ensuring that the product of the single-grind thickness and the number of grinding cycles is less than the carburized layer thickness.

[0014] The design parameters of the remanufactured double-meshing standard wheel include the thickness of the normal arc tooth of the piecing circle, the meshing angle, the center distance, the diameter of the involute starting circle of the double-meshing standard wheel, and the diameter of the involute ending circle of the double-meshing standard wheel.

[0015] The process for determining the thickness of the circular arc teeth is as follows:

[0016] S n0N =S n0 -2*N*ΔS

[0017] Among them, S n0N S represents the thickness of the piecing arc teeth after the Nth sharpening of a double-meshing standard wheel. n0 The normal arc tooth thickness of the new double-meshing standard wheel is N, which is the number of grinding cycles, and ΔS is the thickness of a single grinding cycle.

[0018] The specific process for determining the meshing angle is as follows:

[0019]

[0020]

[0021]

[0022] Where, α 01N S is the meshing angle after the Nth sharpening. n0N The thickness of the piecing arc teeth of the double-meshing standard wheel after the Nth sharpening is t. N S represents the intermediate parameters after the Nth sharpening. n1 For the gear's pitch circle normal arc tooth thickness, α t1 Z0 is the pressure angle of the gear end face, Z1 is the number of teeth of the double-meshing standard gear, and Z0 is the number of teeth of the gear.

[0023] The process for determining the center distance is as follows:

[0024]

[0025] Among them, A N d is the center distance after the Nth sharpening.b0 d is the base circle diameter of the double-meshing standard wheel. b1 Let α be the base circle diameter of the gear. 01N The meshing angle is the angle after the Nth sharpening.

[0026] The specific process for determining the involute starting circle diameter of a double-meshing standard wheel is as follows:

[0027] ρ 0minN =A N *sinα 01N -ρ 1max

[0028]

[0029] Where, ρ 0minN Let A be the radius of curvature of the involute starting circle of the double-meshing standard wheel after the Nth sharpening. N α is the center distance after the Nth sharpening. 01N ρ is the meshing angle after the Nth sharpening. 1max For the maximum radius of curvature of the gear, SAP N d is the diameter of the involute starting circle of the double-meshing standard wheel after the Nth sharpening. b0 The base circle diameter of the double-meshing standard wheel.

[0030] The process for determining the diameter of the involute termination circle of a double-meshing standard wheel is as follows:

[0031] ρ 0maxN =ρ 0minN +(ρ 1max -ρ 1min )+Δl

[0032]

[0033] Where, ρ 0maxN Let ρ be the radius of curvature of the involute termination circle of the double-meshing standard wheel after the Nth sharpening. 0minN Let ρ be the radius of curvature of the involute starting circle of the double-meshing standard wheel after the Nth sharpening. 1max ρ is the maximum radius of curvature of the gear. 1min Let Δl be the minimum radius of curvature of the gear, and EAP be the excess of the minimum radius of curvature of the gear. N The diameter of the involute termination circle of the double-meshing standard wheel after the Nth sharpening is denoted as .

[0034] After the design parameters of the standard wheel are determined, they need to be checked, as follows:

[0035] If the tooth tip and tooth root do not come into contact, the clearance of the double-meshing standard wheel after the Nth sharpening must meet the following condition:

[0036]

[0037] The following conditions must be met for edge engagement to occur:

[0038] ρ 0minN >0

[0039] A N *sinα 01N -ρ 0maxN >0

[0040] The following conditions must be met for negative engagement to occur:

[0041] invα 01N >0

[0042] Among them, c 10N D represents the top clearance of the double-meshing standard wheel after the Nth sharpening. aN D is the tip circle diameter of the double-meshing standard wheel after the Nth sharpening. f1 ρ is the diameter of the root circle of the gear teeth. 0minN Let ρ be the radius of curvature of the involute starting circle of the double-meshing standard wheel after the Nth sharpening. 0maxN Let α be the radius of curvature of the involute termination circle of the double-meshing standard wheel after the Nth sharpening. 01N The meshing angle is the angle after the Nth sharpening.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] This invention discloses a remanufacturing design method for a double-meshing standard wheel, specifically as follows: Determining the single-grinding thickness. Obtaining the heat-treated carburized layer thickness of the double-meshing standard wheel, and determining the number of grinding passes based on the carburized layer thickness and the single-grinding thickness. This method comprehensively considers factors such as design parameter limitations and the thickness of the carburized layer from conventional heat treatment, ultimately obtaining a reasonable single-grinding thickness and number of grinding passes. Confirming the design parameters of the remanufactured double-meshing standard wheel based on the single-grinding thickness and the number of grinding passes. Obtaining a grinding parameter table based on the single-grinding thickness and the number of grinding passes, and remanufacturing the double-meshing standard wheel accordingly. When using the remanufactured double-meshing standard wheel, only minor adjustments are needed based on the new center distance. This method provides a reasonable design scheme for the remanufacturing of double-meshing standard wheels, improving the utilization rate of standard wheels, reducing waste, and effectively reducing the usage cost of double-meshing standard wheels. Attached Figure Description

[0045] Figure 1 This is a flowchart illustrating the remanufacturing process of the dual-meshing standard wheel of the present invention.

[0046] Figure 2 This is a schematic diagram illustrating the design principle of the remanufacturing of the dual-meshing standard wheel of the present invention;

[0047] Figure 3 This is a front view of the double-meshing standard gear of the present invention;

[0048] Figure 4 This is a side view of the double-meshing standard gear of the present invention.

[0049] Among them, 1. Double-meshing standard wheel; 2. First remanufactured standard wheel; 3. Second remanufactured standard wheel. Detailed Implementation

[0050] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0051] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0052] The present invention will now be described in further detail with reference to the accompanying drawings:

[0053] See Figure 1 This invention discloses a remanufacturing design method for a double-meshing standard wheel, comprising the following steps:

[0054] Determine the thickness for a single grinding operation;

[0055] Specifically as follows:

[0056] The thickness of a single grinding pass is determined based on the grinding accuracy of the machine tool and the tolerance range of standard gears (grades 4-6). The thickness of a single grinding pass shall not be less than the grinding accuracy of the machine tool.

[0057] Obtain the heat-treated carburized layer thickness of the double-meshing standard wheel, and determine the number of grinding cycles by combining the carburized layer thickness and the thickness of a single grinding cycle.

[0058] The number of sharpening cycles is determined by combining the thickness of the carburized layer and the thickness of a single sharpening pass, as follows:

[0059] Obtain the heat-treated carburized layer thickness of the double-meshing standard wheel, ensuring that the product of the single-grind thickness and the number of grinding cycles is less than the carburized layer thickness.

[0060] The design parameters of the remanufactured double-meshing standard wheel are confirmed by combining the thickness of a single grinding and the number of grinding cycles.

[0061] The design parameters of the remanufactured double-meshing standard wheel include the thickness of the normal arc tooth of the piecing circle, the meshing angle, the center distance, the diameter of the involute starting circle of the double-meshing standard wheel, and the diameter of the involute ending circle of the double-meshing standard wheel.

[0062] The process for determining the thickness of the circular arc teeth is as follows:

[0063] S n0N =S n0 -2*N*ΔS

[0064] Among them, S n0N S represents the thickness of the piecing arc teeth after the Nth sharpening of a double-meshing standard wheel. n0 The normal arc tooth thickness of the new double-meshing standard wheel is N, which is the number of grinding cycles, and ΔS is the thickness of a single grinding cycle.

[0065] The process for determining the meshing angle is as follows:

[0066]

[0067]

[0068]

[0069] Where, α 01N S is the meshing angle after the Nth sharpening. n0N The thickness of the piecing arc teeth of the double-meshing standard wheel after the Nth sharpening is t. N S represents the intermediate parameters after the Nth sharpening. n1 For the gear's pitch circle normal arc tooth thickness, α t1 Z0 is the pressure angle of the gear end face, Z1 is the number of teeth of the double-meshing standard gear, and Z0 is the number of teeth of the gear.

[0070] The process for determining the center distance is as follows:

[0071]

[0072] Among them, A N The center distance after the Nth sharpening is d. b0 d is the base circle diameter of the double-meshing standard wheel. b1 Let α be the base circle diameter of the gear. 01N The meshing angle is the angle after the Nth sharpening.

[0073] The specific process for determining the involute starting circle diameter of a double-meshing standard wheel is as follows:

[0074] ρ 0minN =A N *sinα 01N -ρ 1max

[0075]

[0076] Where, ρ 0minN Let A be the radius of curvature of the involute starting circle of the double-meshing standard wheel after the Nth sharpening. N α is the center distance after the Nth sharpening. 01N ρ is the meshing angle after the Nth sharpening. 1max For the maximum radius of curvature of the gear, SAP N d is the diameter of the involute starting circle of the double-meshing standard wheel after the Nth sharpening. b0 The base circle diameter of the double-meshing standard wheel.

[0077] The process for determining the diameter of the involute termination circle of a double-meshing standard wheel is as follows:

[0078] ρ 0maxN =ρ 0minN +(ρ 1max -ρ 1min )+Δl

[0079]

[0080] Where, ρ 0maxN Let ρ be the radius of curvature of the involute termination circle of the double-meshing standard wheel after the Nth sharpening. 0minN Let ρ be the radius of curvature of the involute starting circle of the double-meshing standard wheel after the Nth sharpening. 1max ρ is the maximum radius of curvature of the gear. 1min Let Δl be the minimum radius of curvature of the gear, and EAP be the excess of the minimum radius of curvature of the gear. N The diameter of the involute termination circle of the double-meshing standard wheel after the Nth sharpening is denoted as .

[0081] After the design parameters of the standard wheel are determined, they need to be checked, as follows:

[0082] If the tooth tip and tooth root do not come into contact, the clearance of the double-meshing standard wheel after the Nth sharpening must meet the following condition:

[0083]

[0084] The following conditions must be met for edge engagement to occur:

[0085] ρ 0minN >0

[0086] A N*sinα 01N -ρ 0maxN >0

[0087] The following conditions must be met for negative engagement to occur:

[0088] invα 01N >0

[0089] Among them, c 10N D represents the top clearance of the double-meshing standard wheel after the Nth sharpening. aN D is the tip circle diameter of the double-meshing standard wheel after the Nth sharpening. f1 ρ is the diameter of the root circle of the gear teeth. 0minN Let ρ be the radius of curvature of the involute starting circle of the double-meshing standard wheel after the Nth sharpening. 0maxN Let α be the radius of curvature of the involute termination circle of the double-meshing standard wheel after the Nth sharpening. 01N The meshing angle is the angle after the Nth sharpening.

[0090] Preferred embodiment 1:

[0091] See Figure 1 This invention discloses a remanufacturing design method for a double-meshing standard wheel, comprising the following steps:

[0092] Determine the thickness for a single grinding operation;

[0093] Obtain the heat-treated carburized layer thickness of the double-meshing standard wheel, and determine the number of grinding cycles by combining the carburized layer thickness and the thickness of a single grinding cycle.

[0094] The design parameters of the remanufactured double-meshing standard wheel are confirmed by combining the thickness of a single grinding and the number of grinding cycles.

[0095] This method comprehensively considers factors such as design parameter limitations and the thickness of the carburized layer during conventional heat treatment, ultimately yielding a reasonable single-brush grinding thickness and number of grinding cycles. A grinding parameter table is generated based on the single-brush grinding thickness and number of grinding cycles, and the double-meshing standard wheel is remanufactured accordingly. (See [link to table]). Figure 2 This is a schematic diagram illustrating the design principle of the remanufacturing of the dual-meshing standard wheel of the present invention. Figure 3 and Figure 4 This is a structural diagram of the double-meshing standard wheel of the present invention. The worn double-meshing standard wheel 1 can be sequentially remanufactured to obtain a first remanufactured standard wheel 2 and a second remanufactured standard wheel 3, meaning that the worn double-meshing standard wheel 1 can be remanufactured multiple times according to this method. When using the remanufactured double-meshing standard wheel, only minor adjustments are needed based on the new center distance. This method provides a reasonable design scheme for the remanufacturing of double-meshing standard wheels, improves the utilization rate of standard wheels, reduces waste, and effectively lowers the usage cost of double-meshing standard wheels.

[0096] Preferred embodiment two:

[0097] S1. Determine the thickness for a single grinding pass;

[0098] Specifically as follows:

[0099] The thickness of a single grinding pass is determined based on the grinding accuracy of the machine tool and the tolerance range of standard gears (grades 4-6). The thickness of a single grinding pass shall not be less than the grinding accuracy of the machine tool.

[0100] The determination of the thickness ΔS of a single grinding operation mainly considers the following two points:

[0101] The required grinding thickness to eliminate conventional wear and tooth profile deviations: According to national standards, the tolerance range for standard gears of grades 4-6 is generally around tens of micrometers. For standard gears with out-of-tolerance tooth profiles after use, the grinding thickness in a single operation must be at least on the order of this order to ensure the grinding effect.

[0102] Machine tool sharpening accuracy: The thickness of a single sharpening operation on a machine tool is approximately 0.05-0.15mm on one side. If the designed single sharpening thickness is too small, the machine tool cannot guarantee it. This depends on the actual accuracy of the machine tool.

[0103] S2. Obtain the thickness of the heat-treated carburized layer of the double-meshing standard wheel, and determine the number of grinding cycles by combining the thickness of the carburized layer and the thickness of a single grinding cycle;

[0104] The number of grinding passes is determined by combining the thickness of the carburized layer and the thickness of a single grinding pass, as follows:

[0105] Obtain the heat-treated carburized layer thickness of the double-meshing standard wheel, ensuring that the product of the single-grind thickness and the number of grinding cycles is less than the carburized layer thickness.

[0106] The determination of the number of sharpening cycles mainly considers the following factors:

[0107] Design parameter limitations: As can be seen from the grinding principle, grinding reduces the tooth thickness of the standard gear, decreases the meshing center distance, and reduces the standard gear displacement coefficient. Therefore, the design parameters of the standard gear after grinding need to be verified. See the design process for details.

[0108] Carburized layer thickness after heat treatment: To ensure the surface performance of standard wheels, they generally undergo heat treatment. The typical carburized layer thickness ranges from 0.8 to 1.2 mm, and the product of the grinding thickness and the number of grinding passes should be less than the carburized layer thickness.

[0109] Given the parameters of the new double-meshing standard gear, including the number of teeth Z0 and the normal module m. n Center distance A, tooth thickness S in the normal arc of the piecing circle n0 After confirming the single-sharpening thickness ΔS (single side) and the number of sharpening cycles N, the thickness of the piecing arc teeth after each sharpening cycle is calculated. The remaining parameters of the remanufactured double-meshing standard wheel are then calculated, resulting in a sharpening parameter table for the double-meshing standard wheel.

[0110] S3. Combine the single-grind thickness and the number of grinding cycles to confirm the design parameters of the remanufactured double-meshing standard wheel.

[0111] The design parameters of the remanufactured double-meshing standard wheel include the thickness of the normal arc tooth at the plucking circle, the meshing angle, the center distance, the diameter of the involute starting circle, and the diameter of the involute ending circle. See also... Figure 2 This is a schematic diagram illustrating the design principle of the remanufacturing of the dual-meshing standard wheel of the present invention. Figure 3 and Figure 4 This is a structural diagram of the double-meshing standard gear of the present invention. The worn double-meshing standard gear 1 can be remanufactured sequentially to obtain a first remanufactured standard gear 2 and a second remanufactured standard gear 3. That is, according to this method, the worn double-meshing standard gear 1 can be remanufactured multiple times, improving the utilization rate of the standard gear, reducing waste, and effectively reducing the use cost of the double-meshing standard gear.

[0112] The process for determining the thickness of the circular arc teeth is as follows:

[0113] S n0N =S n0 -2*N*ΔS

[0114] Among them, S n0N S represents the thickness of the piecing arc teeth after the Nth sharpening of a double-meshing standard wheel. n0 The normal arc tooth thickness of the new double-meshing standard wheel is N, which is the number of grinding cycles, and ΔS is the thickness of a single grinding cycle.

[0115] The specific process for determining the meshing angle is as follows:

[0116]

[0117]

[0118]

[0119] Where, α 01N S is the meshing angle after the Nth sharpening. n0N The thickness of the piecing arc teeth of the double-meshing standard wheel after the Nth sharpening is t. N S represents the intermediate parameters after the Nth sharpening. n1 For the gear's pitch circle normal arc tooth thickness, α t1 Z0 is the pressure angle of the gear end face, Z1 is the number of teeth of the double-meshing standard gear, and Z0 is the number of teeth of the gear.

[0120] The process for determining the center distance is as follows:

[0121]

[0122] Among them, A N d is the center distance after the Nth sharpening. b0d is the base circle diameter of the double-meshing standard wheel. b1 Let α be the base circle diameter of the gear. 01N The meshing angle is the angle after the Nth sharpening.

[0123] The specific process for determining the involute starting circle diameter of a double-meshing standard wheel is as follows:

[0124] ρ 0minN =A N *sinα 01N -ρ 1max

[0125]

[0126] Where, ρ 0minN Let A be the radius of curvature of the involute starting circle of the double-meshing standard wheel after the Nth sharpening. N α is the center distance after the Nth sharpening. 01N ρ is the meshing angle after the Nth sharpening. 1max For the maximum radius of curvature of the gear, SAP N d is the diameter of the involute starting circle of the double-meshing standard wheel after the Nth sharpening. b0 The base circle diameter of the double-meshing standard wheel.

[0127] The process for determining the diameter of the involute termination circle of a double-meshing standard wheel is as follows:

[0128] ρ 0maxN =ρ 0minN +(ρ 1max -ρ 1min )+Δl

[0129]

[0130] Where, ρ 0maxN Let ρ be the radius of curvature of the involute termination circle of the double-meshing standard wheel after the Nth sharpening. 0minN Let ρ be the radius of curvature of the involute starting circle of the double-meshing standard wheel after the Nth sharpening. 1max ρ is the maximum radius of curvature of the gear. 1min Let Δl be the minimum radius of curvature of the gear, and EAP be the excess of the minimum radius of curvature of the gear. N The diameter of the involute termination circle of the double-meshing standard wheel after the Nth sharpening is denoted as .

[0131] After the design parameters of the standard wheel are determined, they need to be checked, as follows:

[0132] If the tooth tip and tooth root do not come into contact, the clearance of the double-meshing standard wheel after the Nth sharpening must meet the following condition:

[0133]

[0134] The following conditions must be met for edge engagement to occur:

[0135] ρ 0minN >0

[0136] A N *sinα 01N ―ρ 0maxN >0

[0137] The following conditions must be met for negative engagement to occur:

[0138] invα 01N >0

[0139] Among them, c 10N D represents the top clearance of the double-meshing standard wheel after the Nth sharpening. aN D is the tip circle diameter of the double-meshing standard wheel after the Nth sharpening. f1 ρ is the diameter of the root circle of the gear teeth. 0minN Let ρ be the radius of curvature of the involute starting circle of the double-meshing standard wheel after the Nth sharpening. 0maxN Let α be the radius of curvature of the involute termination circle of the double-meshing standard wheel after the Nth sharpening. 01N The meshing angle is the angle after the Nth sharpening.

[0140] This invention proposes a remanufacturing design method for double-meshing standard gears by analyzing the basic design principles of standard gears and combining them with actual manufacturing conditions. Taking into account factors such as design parameter limitations, machine tool grinding accuracy, and the thickness of the carburized layer after conventional heat treatment, a reasonable single-grinding thickness and number of grinding cycles are obtained. Based on the single-grinding thickness, the pitch circle tooth thickness of the double-meshing standard gear under different grinding cycles is calculated. Based on the standard gear design principles, other parameters such as the center distance are calculated to obtain a grinding parameter table, which is then used to remanufacture the double-meshing standard gear. When using the remanufactured double-meshing standard gear, only minor adjustments are needed based on the new center distance. This method provides a reasonable design scheme for the remanufacturing of double-meshing standard gears, improves the utilization rate of standard gears, and effectively reduces the usage cost of double-meshing standard gears.

[0141] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A remanufacturing design method for a double-meshing standard wheel, characterized in that, Includes the following steps: The thickness of a single grinding pass is determined as follows: the thickness of a single grinding pass is determined based on the grinding accuracy of the machine tool and the tolerance range of standard gears grade 4-6. The thickness of a single grinding pass shall not be less than the grinding accuracy of the machine tool. To obtain the heat-treated carburized layer thickness of the double-meshing standard wheel, the number of grinding cycles is determined by combining the carburized layer thickness and the single grinding thickness. Specifically, the heat-treated carburized layer thickness of the double-meshing standard wheel is obtained such that the product of the single grinding thickness and the number of grinding cycles is less than the carburized layer thickness. The design parameters of the remanufactured double-meshing standard wheel were confirmed by combining the thickness of a single grinding cycle and the number of grinding cycles. The design parameters of the remanufactured double-meshing standard wheel include the thickness of the normal arc tooth of the piecing circle, the meshing angle, the center distance, the diameter of the involute starting circle of the double-meshing standard wheel, and the diameter of the involute ending circle of the double-meshing standard wheel.

2. The remanufacturing design method for a double-meshing standard wheel as described in claim 1, characterized in that, The process for determining the normal arc tooth thickness of the double-meshing standard wheel is as follows: in, For the double-meshing standard wheel The thickness of the normal arc tooth of the double-meshing standard wheel after secondary grinding. For the new double-meshing standard gear, the normal arc tooth thickness of the piecing circle is... The number of sharpening cycles. The thickness is the thickness after a single grinding operation.

3. The remanufacturing design method for a double-meshing standard wheel as described in claim 1, characterized in that, The process for determining the meshing angle is as follows: in, For the first The meshing angle after secondary grinding For the double-meshing standard wheel The thickness of the normal arc tooth of the double-meshing standard wheel after secondary grinding. intermediate parameters For the gear's pitch circle normal arc tooth thickness, The pressure angle of the gear end face. The number of teeth for a double-meshing standard gear. This represents the number of teeth on the gear.

4. The remanufacturing design method for a double-meshing standard wheel as described in claim 1, characterized in that, The process for determining the center distance is as follows: in, For the first Center distance after secondary grinding The base circle diameter of the double-meshing standard wheel. The base circle diameter of the gear. For the first The meshing angle after secondary grinding.

5. The remanufacturing design method for a double-meshing standard wheel as described in claim 1, characterized in that, The process for determining the involute starting circle diameter of the double-meshing standard wheel is as follows: in, For the first The radius of curvature of the involute starting circle of the double-meshing standard wheel after secondary sharpening. For the first Center distance after secondary grinding For the first The meshing angle after secondary grinding The maximum radius of curvature of the gear. For the first The involute starting circle diameter of the double-meshing standard wheel after secondary sharpening. The base circle diameter of the double-meshing standard wheel.

6. The remanufacturing design method for a double-meshing standard wheel as described in claim 1, characterized in that, The process for determining the involute termination circle diameter of the double-meshing standard wheel is as follows: in, For the first The radius of curvature of the involute termination circle of the double-meshing standard wheel after secondary sharpening. For the first The radius of curvature of the involute starting circle of the double-meshing standard wheel after secondary sharpening. The maximum radius of curvature of the gear. The minimum radius of curvature of the gear. This is the excess of the minimum radius of curvature of the gear. For the first The involute termination circle diameter of the double-meshing standard wheel after secondary grinding.

7. The remanufacturing design method for a double-meshing standard wheel as described in claim 1, characterized in that, After the design parameters of the standard wheel are determined, the design parameters need to be checked, as follows: If the tooth crest and tooth root do not come into contact, then the first... The top clearance of the double-meshing standard wheel after secondary grinding needs to meet the following conditions: The following conditions must be met for edge engagement to occur: The following conditions must be met for negative engagement to occur: in, For the first The top clearance of the double-meshing standard wheel after secondary sharpening For the first The tip circle diameter of the double-meshing standard wheel after secondary grinding. The root circle diameter of the gear teeth. For the first The radius of curvature of the involute starting circle of the double-meshing standard wheel after secondary sharpening. For the first The radius of curvature of the involute termination circle of the double-meshing standard wheel after secondary sharpening. For the first The meshing angle after secondary grinding It is the normal modulus.

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