Special-shaped tooth flat rake face tooth cutting cutter model and detection method

Abstract

The invention relates to the technical field of cutter contour detection, in particular to a special-shaped tooth flat rake face tooth cutting cutter model and a detection method.The detection method comprises the following steps that based on a tooth cutting cutter model result, the maximum distance point between a flank face and the axis of a tooth cutting cutter on planes of different heights is obtained; the minimum distance points between the tooth grooves on the planes with different heights and the axis of the tooth cutting cutter are obtained; the distance between the maximum distance point between the rear tool face and the axis of the tooth cutting tool and the minimum distance point between the tooth groove and the axis of the tooth cutting tool on the plane with the same height is obtained and serves as the detection distance; acquiring the number of teeth of the tooth cutting cutter, acquiring the time of passing through one tooth based on the number of teeth of the tooth cutting cutter, and taking the time as a detection period; and based on the detection distance and the detection period, contour detection after the special-shaped tooth flat rake face tooth cutting cutter modeling is carried out by means of a detection mechanism. According to the special-shaped tooth flat rake face tooth cutting cutter obtained through modeling, it can be guaranteed that the high surface quality is achieved through contour geometric parameter detection, and the machining precision is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of tool profile detection, and in particular to a shaping and detection method of a tooth-cutting cutter with a flat front cutting edge of a special-shaped tooth. Background Art

[0002] At present, the design theory and method of tooth-cutting cutters are becoming more and more mature. On the one hand, most of the tool design theories and methods are aimed at involute tooth-cutting cutters, but there is less research on tool design for special-shaped tooth-cutting cutters. On the other hand, there are few surface profile detection technologies for special-shaped tooth-cutting cutters after shaping. The current high-precision optical detection is on the one hand costly and on the other hand has low detection efficiency.

[0003] Contour detection is a necessary step in quality verification of the toothed cutter after shaping, and it is also an important means of quality inspection after the toothed cutter is used. By measuring the geometric parameters of the toothed cutter surface, the quality of the tool after shaping can be verified and the wear and damage that may occur to the tool during the production process can be obtained in a timely manner, thereby ensuring the performance and processing accuracy of the tool. Therefore, a shaping and detection method for a toothed cutter with a flat front blade face of a special-shaped tooth is provided to provide a high-precision toothed cutter with a flat front blade face, and to measure the geometric parameters of the toothed cutter surface with a low cost and high efficiency. Summary of the invention

[0004] To solve the above problems, the present invention provides a shaping and detection method for a tooth-cutting cutter with a flat front blade surface, which is used to provide a high-precision tooth-cutting cutter with a flat front blade surface, and to measure the geometric parameters of the tooth-cutting cutter surface with a low cost and high efficiency.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a shaping and detection method of a tooth-cutting cutter with a flat rake face of a special-shaped tooth, comprising: The shaping steps of the tooth cutter with flat rake face of special-shaped gear are as follows: the special-shaped gear to be processed is obtained, a number of shape value points are selected based on the conjugate surface of the tooth surface of the special-shaped gear and according to the constraint conditions, and the shape value points are fitted by the fitting curve to obtain the cutting edge of the tooth cutter with flat rake face of special-shaped gear; the free-form surface formed by a series of cutting edges obtained by intersection is the back face; the plane where the first cutting edge is located is the rake face; The steps of contour detection after the serration cutter with a flat front blade of a special-shaped tooth is shaped: based on the serration cutter shaping result, obtain the maximum distance point between the back blade and the serration cutter axis on different height planes, and obtain the minimum distance point between the tooth groove and the serration cutter axis on different height planes; obtain the distance between the maximum distance point between the back blade and the serration cutter axis and the minimum distance point between the tooth groove and the serration cutter axis on the same height plane, and use it as the detection distance; obtain the number of teeth of the serration cutter, and based on the number of teeth of the serration cutter, obtain the time it takes for one tooth to pass, and use it as the detection cycle; based on the detection distance and the detection cycle, perform contour detection after the serration cutter with a flat front blade of a special-shaped tooth is shaped with the help of a detection mechanism.

[0006] Further, the steps for selecting several type value points are as follows: Constructing a number of tangent arc segments on the conjugate surface of the tooth surface of the special-shaped gear to be processed; Discrete arc segments on the arc according to a fixed center angle to obtain shape value points.

[0007] Furthermore, the type value points are fitted by the curve fitting function of the modeling module of UG10.0, and the curve generated after fitting is the cutting edge of the tooth cutter with flat rake face of special-shaped teeth.

[0008] Furthermore, the back cutting edge is constructed through the surface modeling function of the modeling module of UG10.0.

[0009] Furthermore, the detection mechanism includes a detection table, a chuck is rotatably connected to the surface of the detection table, a driving member for driving the chuck to rotate is arranged inside the detection table, a support seat is also arranged on the surface of the detection table, a telescopic shaft is slidably connected to the support seat on a side close to the chuck, a telescopic block is slidably connected to the side of the support seat away from the chuck, the telescopic block is fixedly connected to the telescopic shaft, a constant pressure spring is also arranged on the surface of the detection table, a surface of the telescopic block close to the constant pressure spring is abutted against the constant pressure spring, and a displacement sensor for detecting the sliding distance of the telescopic shaft is also arranged inside the detection table; and a controller is also included, and the controller is connected to the driving member and the displacement sensor signal.

[0010] Furthermore, the gear cutter after grinding is fixed on the chuck, and the driving part and the displacement sensor are controlled by the controller. The displacement sensor detects the displacement length of the telescopic shaft in real time. The controller compares the displacement length of the telescopic shaft and the detection distance within the detection period, and outputs the gear cutter detection result.

[0011] Furthermore, the detection results of the gear cutter include the tooth accuracy and tooth uniformity of the gear cutter. The controller compares the similarity between the displacement length of the telescopic shaft and the detection distance to output the tooth accuracy of the gear cutter; the controller compares the uniformity of the displacement length of the telescopic shaft in each detection cycle to output the tooth uniformity of the gear cutter.

[0012] Furthermore, the support seat is slidably connected to the support platform, and a telescopic device for adjusting the height of the support seat is arranged in the support platform. The telescopic device is connected to the controller signal. The controller controls the operation of the telescopic device after each rotation of the driving member to adjust the height of the support seat, thereby detecting the teeth of the toothed cutter in different height planes.

[0013] Furthermore, a pressure sensor is provided on the surface of one side of the telescopic block that abuts against the constant pressure spring, and the pressure sensor is connected to the controller signal; When the controller controls the operation of the driving member, the controller detects the fluctuation of the pressure signal collected by the pressure sensor, and outputs the surface roughness of the tooth of the skiving cutter based on the fluctuation amplitude and fluctuation frequency of the pressure signal.

[0014] Furthermore, the surface of one end of the telescopic shaft close to the chuck is a hemispherical structure.

[0015] The above scheme has the following beneficial effects: The shaping and detection method of the tooth cutter with a flat front blade face of a special-shaped tooth proposed in the present invention can ensure that the tooth surface of the special-shaped gear has high processing accuracy and surface quality. And through the shaping and detection method of the tooth cutter with a flat front blade face of a special-shaped tooth, the contour geometric parameter measurement and detection of the tooth cutter with a flat front blade face of a special-shaped tooth that is shaped and ground can be carried out, so that the tooth processing accuracy, tooth uniformity and tooth surface roughness of the tooth cutter can be obtained at low cost and high efficiency. It can also be used for the contour geometric parameter measurement and detection of the tooth cutter after use to ensure the performance and processing accuracy of the tooth cutter. Compared with the existing optical visual detection method, the detection cost is low and it is more convenient and efficient. It can also be detected when the tooth cutter is in a dynamic state. The dynamic detection can reflect the accuracy of the tooth cutter when it is close to the use state.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a flow chart of an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of a tooth-cutting cutter with a flat front cutting surface and a special-shaped tooth according to an embodiment of the present invention; Figure 3 A schematic diagram of cutting edge type value point selection according to an embodiment of the present invention; Figure 4 A schematic diagram of forming a flank surface according to an embodiment of the present invention; Figure 5 A top view of a detection mechanism according to an embodiment of the present invention; Figure 6 It is a front view of the detection mechanism of an embodiment of the present invention.

[0018] The figure marks in the drawings of the specification include: 1, blade body; 2, blade teeth; 3, back blade surface; 4, cutting edge; 5, front blade surface; 6, first cutting edge; 101, detection table; 102, chuck; 103, telescopic shaft; 104, support table; 105, telescopic block; 106, constant pressure spring. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The following is further described in detail through specific implementation methods: Implementation example Figure 1-Figure 4 As shown: A shaping and detection method for a tooth-scraping cutter with a flat front blade surface having a special-shaped tooth, mainly includes a shaping part and a detection part, so as to ensure that the tooth-scraping cutter with a flat front blade surface having a special-shaped tooth obtained by shaping has a high quality. Meanwhile, the detection part can be used for detecting the surface profile of the tooth-scraping cutter after use, so as to ensure its processing performance and accuracy.

[0021] The modeling steps include: Obtain the special-shaped gear to be processed, based on the conjugate surface of the tooth surface of the special-shaped gear and select a number of profile points according to the constraint conditions, and obtain the cutting edge 4 of the tooth cutter on the flat front cutting edge of the special-shaped gear by fitting the profile points with a curve; the free surface composed of a series of cutting edges 4 obtained by intersection is the back cutting edge 3; the plane where the first cutting edge 6 is located is the front cutting edge 5.

[0022] The steps for selecting several shape value points are as follows: construct several tangent arc segments on the conjugate surface of the tooth surface of the special-shaped gear to be processed; discretize the arc segments on the arc according to the fixed center angle, and then obtain the shape value points.

[0023] The shape value points are fitted by the curve fitting function of the modeling module of UG10.0, and the curve generated after fitting is the cutting edge 4 of the tooth-shaped flat front face cutter. The back face 3 is constructed by the surface modeling function of the modeling module of UG10.0.

[0024] The special-shaped tooth flat front blade face cutting cutter is mainly as follows Figure 2 As shown, it includes a blade body 1, with a plurality of blade teeth 2 evenly distributed in the circumferential direction of the blade body 1, tooth grooves between the blade teeth 2, a cutting edge 4 between the front blade face 5 and the back blade face 3 formed by shaping, and a first cutting edge 6 located in the plane where the front blade face 5 is located.

[0025] Among them, the detection part is used to perform contour detection on the special-shaped tooth flat front blade face tooth cutter formed and ground by the special-shaped tooth flat front blade face tooth cutter shaping method, mainly with the help of the detection mechanism: The detection mechanism includes a detection platform 101, the surface of the detection platform 101 is rotatably connected with a chuck 102, the detection platform 101 is provided with a driving member for driving the chuck 102 to rotate, the detection platform 101 is also provided with a support seat, the support seat is slidably connected with a telescopic shaft 103 on the side close to the chuck 102, and the surface of the telescopic shaft 103 close to the chuck 102 is a hemispherical structure. The support seat is slidably connected with a telescopic block 105 on the side away from the chuck 102, and the telescopic block 105 is fixedly connected to the telescopic shaft 103. The surface of the detection platform 101 is also provided with a constant pressure spring 106, and the surface of the telescopic block 105 close to the constant pressure spring 106 is against the constant pressure spring 106. A displacement sensor for detecting the sliding distance of the telescopic shaft 103 is also provided inside the detection platform 101; preferably, the driving member adopts a servo motor, and the displacement sensor adopts a non-contact displacement sensor to avoid interference with the telescopic shaft 103. A controller is also included, and the controller is connected with the driving member and the displacement sensor signal.

[0026] In order to detect different height planes of the tooth cutter, the support seat is slidably connected to the support platform 104 in this embodiment. A telescopic device for adjusting the height of the support seat is provided in the support platform 104. Preferably, the telescopic device can be a cylinder or a lead screw structure. The telescopic device is connected to the controller signal, so that the overall height of the support seat can be adjusted by the controller, thereby adjusting the height of the telescopic shaft 103. It should be noted that before and after the height of the support seat is adjusted, it is necessary to ensure that the telescopic block 105 and the constant pressure spring 106 maintain effective contact. Therefore, when the height of the support seat is adjusted slightly, the height of the constant pressure spring 106 does not need to be adjusted, and when the height of the support seat is adjusted significantly, the height of the constant pressure spring 106 needs to be adjusted.

[0027] The detection steps include: First, based on the modeling results of the toothed cutter, the maximum distance points between the flank 3 and the axis of the toothed cutter on different height planes are obtained, and the minimum distance points between the tooth groove and the axis of the toothed cutter on different height planes are obtained. Since the teeth 2 of the toothed cutter are evenly spaced and there are tooth grooves between each tooth 2, there are several maximum distance points and minimum distance points on the flank 3 of the toothed cutter, and the flank 3 is composed of several cutting edges 4. Therefore, the detection of the flank 3 of the toothed cutter can reflect to a certain extent whether the grinding quality of the toothed cutter meets the modeling requirements.

[0028] In this embodiment, the distance between the maximum distance point between the back cutting edge 3 and the axis of the gear cutter and the minimum distance point between the tooth groove and the axis of the gear cutter on the same height plane is obtained, and it is used as the detection distance; the number of teeth 2 of the gear cutter is obtained, and the time it takes for one tooth 2 to pass is obtained based on the number of teeth 2 of the gear cutter, and it is used as the detection period.

[0029] Then, the ground tooth cutter is fixed on the chuck 102, and the driving member and the displacement sensor are controlled by the controller. The displacement sensor detects the displacement length of the telescopic shaft 103 in real time. The controller compares the displacement length of the telescopic shaft 103 and the detection distance during the detection period, and outputs the tooth cutter detection result.

[0030] Specifically, the detection results of the gear-scraping cutter include the accuracy of the gear-scraping cutter's teeth 2, the uniformity of the gear-scraping cutter's teeth 2, and the surface roughness of the gear-scraping cutter's teeth 2. The detection method is as follows: (1) Tooth 2 accuracy of the toothed cutter: The controller compares the displacement length of the telescopic shaft 103 in each detection cycle with the detection distance and outputs the tooth 2 accuracy of the toothed cutter. The closer the displacement length of the telescopic shaft 103 in the detection cycle is to the detection distance, the closer the tooth 2 accuracy of the toothed cutter is to the shaped toothed cutter, that is, it has a higher accuracy.

[0031] (2) Uniformity of the teeth 2 of the tooth-scraping cutter: The controller compares the uniformity of the displacement length of the telescopic shaft 103 in each detection cycle and outputs the uniformity of the teeth 2 of the tooth-scraping cutter. The more uniform the displacement length of the telescopic shaft 103 in each detection cycle, the smaller the difference between the teeth 2, that is, the higher the uniformity of the teeth 2.

[0032] (3) Surface roughness of the scraper: A pressure sensor needs to be installed on the surface of the side where the telescopic block 105 abuts against the constant pressure spring 106, and the pressure sensor is connected to the controller signal. When the controller controls the operation of the driving part, the controller continuously obtains the pressure signal collected by the pressure sensor, and the controller detects the fluctuation of the pressure signal collected by the pressure sensor, and outputs the surface roughness of the tooth 2 of the scraper based on the fluctuation amplitude and fluctuation frequency of the pressure signal. When the hemispherical surface of the telescopic shaft 103 slides along the tooth 2 and tooth groove of the scraper in sequence, when passing through an area with higher roughness, the smoothness of the telescopic shaft 103 decreases, which increases the fluctuation of the pressure signal collected by the pressure sensor. Thus, a preliminary judgment is made on the surface roughness of the scraper.

[0033] When testing the above items, in order to cover the different height planes of the tooth cutter, the controller controls the operation of the telescopic device after each rotation of the driving part, and adjusts the height of the support seat, so that the teeth 2 of the tooth cutter at different height planes can be tested.

[0034] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A shaping and detection method for a tooth-cutting cutter with a flat front face of a special-shaped tooth, characterized in that: include: The shaping steps of the tooth cutter with flat rake face of special-shaped gear are as follows: the special-shaped gear to be processed is obtained, a number of shape value points are selected based on the conjugate surface of the tooth surface of the special-shaped gear and according to the constraint conditions, and the shape value points are fitted by the fitting curve to obtain the cutting edge of the tooth cutter with flat rake face of special-shaped gear; the free-form surface formed by a series of cutting edges obtained by intersection is the back face; the plane where the first cutting edge is located is the rake face; The steps of contour detection after the serration cutter with a flat front blade of a special-shaped tooth is shaped: based on the serration cutter shaping result, obtain the maximum distance point between the back blade and the serration cutter axis on different height planes, and obtain the minimum distance point between the tooth groove and the serration cutter axis on different height planes; obtain the distance between the maximum distance point between the back blade and the serration cutter axis and the minimum distance point between the tooth groove and the serration cutter axis on the same height plane, and use it as the detection distance; obtain the number of teeth of the serration cutter, and based on the number of teeth of the serration cutter, obtain the time it takes for one tooth to pass, and use it as the detection cycle; based on the detection distance and the detection cycle, perform contour detection after the serration cutter with a flat front blade of a special-shaped tooth is shaped with the help of a detection mechanism.

2. The shaping and detection method of the tooth-cutting cutter with flat rake face of special-shaped teeth according to claim 1, characterized in that: The steps to select several type value points are as follows: Constructing a number of tangent arc segments on the conjugate surface of the tooth surface of the special-shaped gear to be processed; Discrete arc segments on the arc according to a fixed center angle to obtain shape value points.

3. The shaping and detection method of the tooth-cutting cutter with flat rake face of special-shaped teeth according to claim 2, characterized in that: The shape value points are fitted by the curve fitting function of the modeling module of UG10.0, and the curve generated after fitting is the cutting edge of the tooth cutter with flat rake face of special-shaped teeth.

4. The shaping and detection method of the tooth-cutting cutter with flat rake face of special-shaped teeth according to claim 3, characterized in that: The back cutting edge is constructed through the surface modeling function of the modeling module of UG10.

0.

5. The shaping and detection method of the tooth-cutting cutter with flat rake face of special-shaped teeth according to claim 1, characterized in that: The detection mechanism includes a detection table, a chuck is rotatably connected to the surface of the detection table, a driving member for driving the chuck to rotate is arranged inside the detection table, a support seat is also arranged on the surface of the detection table, a telescopic shaft is slidably connected to the support seat on the side close to the chuck, a telescopic block is slidably connected to the side of the support seat away from the chuck, the telescopic block is fixedly connected to the telescopic shaft, a constant pressure spring is also arranged on the surface of the detection table, the surface of the telescopic block on the side close to the constant pressure spring is abutted against the constant pressure spring, and a displacement sensor for detecting the sliding distance of the telescopic shaft is also arranged inside the detection table; and a controller is also included, and the controller is connected to the driving member and the displacement sensor signal.

6. The shaping and detection method of the tooth-cutting cutter with flat rake face of special-shaped teeth according to claim 5, characterized in that: The gear cutter after grinding is fixed on the chuck, and the driving part and the displacement sensor are controlled by the controller. The displacement sensor detects the displacement length of the telescopic shaft in real time. The controller compares the displacement length of the telescopic shaft and the detection distance within the detection period and outputs the gear cutter detection result.

7. The shaping and detection method of the tooth-cutting cutter with flat rake face of special-shaped teeth according to claim 6, characterized in that: The detection results of the gear cutter include the tooth accuracy and tooth uniformity of the gear cutter. The controller compares the similarity between the displacement length of the telescopic shaft and the detection distance to output the tooth accuracy of the gear cutter; the controller compares the uniformity of the displacement length of the telescopic shaft in each detection cycle to output the tooth uniformity of the gear cutter.

8. The shaping and detection method of the tooth-cutting cutter with flat rake face of special-shaped teeth according to claim 7, characterized in that: The support seat is slidably connected to the support platform. A telescopic device for adjusting the height of the support seat is arranged in the support platform. The telescopic device is connected to the controller signal. The controller controls the operation of the telescopic device after each rotation of the driving member to adjust the height of the support seat, thereby detecting the teeth of the toothed cutter in different height planes.

9. The shaping and detection method of the tooth-cutting cutter with flat rake face of special-shaped teeth according to claim 8, characterized in that: A pressure sensor is provided on the surface of the telescopic block against the constant pressure spring, and the pressure sensor is connected to the controller signal; When the controller controls the operation of the driving member, the controller detects the fluctuation of the pressure signal collected by the pressure sensor, and outputs the surface roughness of the tooth of the skiving cutter based on the fluctuation amplitude and fluctuation frequency of the pressure signal.

10. The shaping and detection method of the tooth-cutting cutter with flat rake face of special-shaped teeth according to claim 9, characterized in that: The surface of one end of the telescopic shaft close to the chuck is a hemispherical structure.

Images