Distortion detection device for powder sintered gear and detection mounting method thereof

Abstract

The application discloses a distortion detection device for powder sintered gear and a detection mounting method thereof. The device comprises a clamping mechanism for clamping a gear, a marking mechanism with a marking cavity, the gear is coaxially arranged with the marking cavity, a driving mechanism for driving the clamping mechanism and the gear to move along the axial direction of the gear until the gear enters the marking cavity and contacts with the inner wall of the marking cavity, and the marking mechanism is used for marking the edge of the contacted gear. The distortion detection device is convenient to use and detect, and the gear can be engaged with another gear through the growth of the gear and the reduction of the other gear, so that the sintering deformation influence can be reduced by 80% at most, and thus the availability of the sintered gear can be greatly improved.

Description

Technical Field

[0001] This invention relates to the technical field of gears, and more particularly to a distortion detection device for powder sintered gears and its detection and installation method. Background Technology

[0002] In the manufacturing process of powder metallurgy gears, dimensional control and prediction are crucial considerations. One of the goals of sintering is to ensure that the gear dimensions match the dimensions of the forming mold cavity. However, dimensional variations in powder metallurgy products are also influenced by process parameters such as the characteristics of the raw powder, the distribution of forming stress, sintering temperature, and sintering time. These parameters further affect the dimensional accuracy, microstructure, and mechanical properties of the finished product. In particular, an uneven temperature field distribution during sintering will lead to non-uniform distortion of the gear's geometry, manifested in the distortion of the pitch circle and the outer diameter of the gear.

[0003] Actual measurements of the pitch circle and outer circle of gears show that the diameters can increase or decrease. With conventional design precision, the pass rate and usability of sintered gears are very low. Therefore, it is essential to design a distortion detection device for powder sintered gears and its detection and installation method. Summary of the Invention

[0004] In view of the aforementioned problems in existing gear distortion detection methods, this paper aims to provide a distortion detection device for powder sintered gears and its installation method.

[0005] The specific technical solution is as follows:

[0006] A distortion detection device for powder sintered gears, comprising:

[0007] A clamping mechanism for clamping gears;

[0008] A marking mechanism, wherein the marking mechanism has a marking cavity, and the gear is coaxially arranged with the marking cavity;

[0009] A driving mechanism drives the clamping mechanism and the gear to move along the axial direction of the gear until the gear enters the marking cavity and contacts the inner wall of the marking cavity. The marking mechanism is used to mark the edge of the contacting gear.

[0010] In the aforementioned distortion detection device for powder sintered gears, the inner wall of the marking cavity is conical.

[0011] The above-mentioned distortion detection device for powder sintered gears includes a marking mechanism comprising a measuring tool and a marking element. The measuring tool has a receiving cavity, and the marking element is disposed on the inner wall of the receiving cavity. The marking element forms the marking cavity. The driving mechanism drives the gear to contact the inner wall of the marking cavity, and the marking element marks the edge of the contacting gear.

[0012] In the aforementioned distortion detection device for powder sintered gears, the marking element is ink paper.

[0013] In the aforementioned distortion detection device for powder sintered gears, the marking cavity is a frustum-shaped cavity;

[0014] The minimum diameter of the frustum-shaped cavity is d1 and the maximum diameter is d2, and the outer diameter of the gear is d3, where d1 < d3 < d2.

[0015] In the above-mentioned distortion detection device for powder sintered gears, the total depth of the frustum-shaped cavity is L0;

[0016] When the gear extends into the frustum-shaped cavity and the edge of the gear is in contact with the inner wall of the marked cavity, the distance the gear extends is L1, where L1 < L0.

[0017] A method for installing a distortion detection device for powder sintered gears, wherein the distortion detection device for powder sintered gears described in any one of the above-mentioned methods is used, and the installation method includes:

[0018] Step S1: The driving mechanism drives the gear to extend into the marking cavity along the axial direction of the gear until the edge of the gear contacts the inner wall of the marking element;

[0019] Step S2: Determine the quality of the gear;

[0020] If one side of the edge of the gear is marked, it is a defective gear;

[0021] If both sides of the edge of the gear are marked, then it is a usable gear;

[0022] If the circumference of the edge of the gear is marked evenly, it is a high-quality gear;

[0023] Step S3: The marked part of the edge of the available gear is the growth part of the available gear, and the unmarked part of the edge of the available gear is the shrinkage part of the available gear. Select two available gears and mesh the growth part of one available gear with the shrinkage part of the other available gear.

[0024] Step S4: The maximum radius value r of the available gearmax ,

[0025] The positive effects of the above technical solution compared with the existing technology are:

[0026] The distortion detection device of the present invention is easy to use and convenient for detection. By meshing the extended part of one available gear with the reduced part of another available gear, the influence of sintering deformation can be reduced by up to 80%, thus greatly improving the availability of sintered gears. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the marking mechanism of a distortion detection device for powder sintered gears according to the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of a distortion detection device for powder sintered gears according to the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of two meshing gears in the detection and installation method of the distortion detection device for powder sintered gears according to the present invention;

[0030] In the attached drawings: 1. Gear; 2. Marking mechanism; 3. Marking cavity; 4. Clamping mechanism; 21. Measuring tool; 22. Marking element. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0032] like Figures 1 to 3 As shown, a preferred embodiment of a distortion detection device for powder sintered gears is illustrated, comprising: a clamping mechanism 4, a marking mechanism, and a driving mechanism. The clamping mechanism is used to clamp a gear 1. The marking mechanism 2 has a marking cavity 3. The gear 1 and the marking cavity 3 are coaxially arranged. The driving mechanism drives the clamping mechanism and the gear 1 to move along the axial direction of the gear 1 until the gear 1 enters the marking cavity 3 and contacts the inner wall of the marking cavity 3. The marking mechanism 2 is used to mark the edge of the contacting gear 1.

[0033] Preferably, the driving mechanism is a cylinder, electric cylinder, or other driving component.

[0034] Preferably, the clamping mechanism is a V-shaped clamp.

[0035] Furthermore, as a preferred embodiment, the inner wall of the marking cavity 3 is conical.

[0036] Furthermore, as a preferred embodiment, the marking mechanism 2 includes: a measuring tool 21 and a marking element 22. The measuring tool 21 has a receiving cavity, and the marking element 22 is disposed on the inner wall of the receiving cavity. A marking cavity 3 is formed inside the marking element 22. The driving mechanism drives the gear 1 to contact the inner wall of the marking cavity 3, and the marking element 22 marks the edge of the contacting gear 1.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.

[0038] In addition to the above, the present invention also has the following embodiments:

[0039] In further embodiments of the present invention, please continue to refer to Figures 1 to 3 As shown, marker 22 is ink paper.

[0040] In a further embodiment of the present invention, the marking cavity 3 is a frustum-shaped cavity.

[0041] In a further embodiment of the present invention, the minimum diameter of the frustum-shaped cavity is d1 and the maximum diameter is d2, and the outer diameter of the gear is d3, where d1 < d3 < d2.

[0042] In a further embodiment of the present invention, the total depth of the frustum-shaped cavity is L0.

[0043] In a further embodiment of the present invention, when the gear 1 extends into the frustum-shaped cavity and the edge of the gear 1 is in contact with the inner wall of the marking cavity 3, the distance the gear 1 extends is L1, where L1 < L0.

[0044] Preferably, the distance between the plane where the contact point on gear 1 is located and the entrance plane of the frustum-shaped cavity is L1.

[0045] The detection and installation method of the present invention includes:

[0046] Step S1: The drive mechanism drives the gear 1 to extend into the marking cavity 3 along the axial direction of the gear 1 until the edge of the gear 1 contacts the inner wall of the marking piece 22.

[0047] Step S2: Determine the quality of gear 1;

[0048] If one side of the edge of gear 1 is marked, it is a defective gear;

[0049] If both sides of the edge of gear 1 are marked, then it is a usable gear;

[0050] If the circumference of the edge of gear 1 is marked evenly, it is a high-quality gear;

[0051] Step S3: The marked part of the edge of the available gear 1 is the extension part of the available gear 1, and the unmarked part of the edge of the available gear 1 is the reduction part of the available gear 1. Select two available gears and mesh the extension part of one available gear with the reduction part of the other available gear.

[0052] Step S4: Maximum radius value r of the available gear max ,

[0053] Preferably, after the marking element marks the edge of the gear in step S1, it can be removed from the marking cavity by the drive mechanism.

[0054] Because the deformation of sintered gears is greater than the allowable deviation of the gear set centerline, the direct usability of sintered gears has always been relatively low. By adopting the technical measures described in this invention, the reduced portion of one usable gear meshes with the extended portion of another usable gear, and the extended portion of one usable gear meshes with the reduced portion of another usable gear. This can reduce the impact of sintering deformation by up to 80%, thus greatly improving the usability of sintered gears.

[0055] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A detection and installation method for a distortion detection device for powder sintered gears, characterized in that, A distortion detection device for powder-sintered gears is used, the distortion detection device for powder-sintered gears comprising: A clamping mechanism for clamping gears; A marking mechanism, wherein the marking mechanism has a marking cavity, and the gear is coaxially arranged with the marking cavity; A driving mechanism drives the clamping mechanism and the gear to move along the axial direction of the gear until the gear enters the marking cavity and contacts the inner wall of the marking cavity. The marking mechanism is used to mark the edge of the contacting gear. The inner wall of the marking cavity is conical; The marking mechanism includes: a measuring tool and a marking element. The measuring tool has a receiving cavity, and the marking element is disposed on the inner wall of the receiving cavity. The marking element forms the marking cavity. The driving mechanism drives the gear to contact the inner wall of the marking cavity, and the marking element marks the edge of the contacting gear. The marking cavity is a frustum-shaped cavity; The minimum diameter of the frustum-shaped cavity is d1 and the maximum diameter is d2, and the outer diameter of the gear is d3, where d1 < d3 < d2; The total depth of the frustum-shaped cavity is L0; When the gear extends into the frustum-shaped cavity and the edge of the gear is in contact with the inner wall of the marking cavity, the distance the gear extends is L1, where L1 < L0. The distance between the plane where the contact point on the gear is located and the entrance plane of the frustum-shaped cavity is L1; The detection and installation method includes: Step S1: The driving mechanism drives the gear to extend into the marking cavity along the axial direction of the gear until the edge of the gear contacts the inner wall of the marking element; Step S2: Determine the quality of the gear; If one side of the edge of the gear is marked, it is a defective gear; If both sides of the edge of the gear are marked, then it is a usable gear; If the circumference of the edge of the gear is marked evenly, it is a high-quality gear; Step S3: The marked part of the edge of the available gear is the growth part of the available gear, and the unmarked part of the edge of the available gear is the shrinkage part of the available gear. Select two available gears and mesh the growth part of one available gear with the shrinkage part of the other available gear. Step S4: The maximum radius value of the available gear , .

2. The detection and installation method of the distortion detection device for powder sintered gears according to claim 1, characterized in that, The marking material is ink-coated paper.

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