Scimitar angle detection method, detection device and equipment

Abstract

The present invention relates to a method for detecting the angle of a curved blade, which comprises the following steps: setting a switch circuit, when the detection probe touches the blade, the switch circuit is closed and a signal is sent; before the blade is bent, the servo motor is rotated, the detection probe is in contact with the blade, the switch circuit sends a signal, the contact point of the detection probe and the blade is position 1, and the rotation angle W1 relative to the zero position of the servo motor is recorded; when the blade is bent, the servo motor is rotated, the detection probe is in contact with the bending section of the blade, the contact point of the detection probe and the bending section of the blade is position 2, and the rotation angle W2 relative to the zero position of the servo motor is recorded; the actual bending angle of the blade is calculated by a formula to determine whether it meets the requirements, if it is too small or too large, the difference is fed back to the device for secondary bending until the bending angle meets the requirements. The present invention also discloses a device and equipment for detecting the angle of a curved blade.

Description

Technical Field

[0001] The present application relates to the field of blade processing, and in particular to a method, a detection device and equipment for detecting the bending angle of a blade after bending. Background Art

[0002] Installing a blade in the slit of the die plate and punching the material with the blade is a very common processing method in the industry. The size of the slit on the die plate needs to be compatible with the blade, so that the blade will not fall off or shake after being installed in the slit, avoiding affecting the punching quality of the product.

[0003] Due to the different materials and shapes of products, the slits and blades may be curved and angled, and no longer straight and long. In the industry, installing the blade on the slit requires a special knife installer with rich experience, which is difficult for ordinary technicians to do. The bending angle of the blade formed by bending with the commonly used bending machine on the market often deviates from the design angle. When installing the blade, the knife installer needs to manually adjust the bending angle of the blade again and again based on experience, and bend the bending angle of the blade to match the bending angle of the slit before the blade can be installed in the slit. This process is often time-consuming and labor-intensive, delaying the normal production.

[0004] It has become a demand in the industry to develop a scimitar angle detection method, a scimitar angle detection device, and apply the scimitar angle detection device to a scimitar machine to form a scimitar equipment with scimitar angle detection. Summary of the invention

[0005] In view of at least one of the above technical problems, the present application provides a scimitar angle detection method, a scimitar angle detection device and a scimitar equipment.

[0006] The embodiment of the first aspect of the present application provides a method for detecting a scimitar angle, which comprises the following steps:

[0007] Fix the detection probe on the rotating shaft of the servo motor through the detection swing arm;

[0008] A gauge positioning block for positioning the blade is arranged above or below the servo motor;

[0009] Set a switch circuit, when the detection probe touches the blade, the switch circuit is closed and a signal is sent;

[0010] Before the blade is bent, the blade is placed on the positioning block of the inspection fixture, the servo motor is rotated, the detection probe contacts the blade, the switch circuit sends a signal, the contact point between the detection probe and the blade is position 1, and the rotation angle W1 relative to the zero position of the servo motor is recorded;

[0011] After the blade is bent, the blade is placed on the positioning block of the inspection fixture, and the bending part of the blade is located on the central axis of the servo motor rotating shaft. The servo motor is rotated, and the detection probe contacts the bending section of the blade. The switch circuit sends a signal, and the contact point between the detection probe and the bending section of the blade is position 2. The rotation angle W2 relative to the zero position of the servo motor is recorded;

[0012] The formulas of bending angle A=W2-W1 and bending supplementary angle B=180-(W2-W1) can be used to calculate whether the actual bending angle of the blade meets the requirements. If it is too small or too large, the difference will be fed back to the equipment for secondary bending until the bending angle meets the requirements.

[0013] As a further improvement of the present invention, the detection probe and the blade are switches, and when the detection probe and the blade are in contact, the switch circuit is closed and a signal is sent out;

[0014] Or the detection probe is a switch, which is provided with a probe. When the probe touches the blade, the switch circuit is closed and a signal is sent out.

[0015] As a further improvement of the present invention, the bent blade is transported toward the shearing device, and the lifting power assembly drives the lifting base to rise, avoiding the bent section and allowing the straight section to enter the positioning groove for positioning; after the measurement of the curved blade angle is completed, the lifting power assembly drives the lifting base to descend, and the blade leaves the positioning groove and continues to be transported toward the shearing device.

[0016] A scimitar angle detection device, comprising:

[0017] The gauge positioning block is used to position the straight section of the blade, so as to facilitate the measurement of the angle between the straight section and the bent section of the blade;

[0018] A detection component, which is arranged above or below the positioning block of the inspection tool, and can touch the wall surface of the bending section after the detection component is rotated;

[0019] And a detection lifting device, the inspection fixture positioning block 1 and the detection component are arranged on the lifting base of the detection lifting device, and are driven to rise or fall by the detection lifting device.

[0020] As a further improvement of the present invention, the detection component comprises:

[0021] A servo motor, the rotation of which drives the detection assembly to rotate, and the blade bending angle is calculated according to the rotation angle of the servo motor;

[0022] A detection swing arm, the head end of which is fixed on the rotating shaft of the servo motor;

[0023] The detection probe is arranged on the detection swing arm. After the detection swing arm swings, the detection probe can touch the wall surface of the bending section.

[0024] As a further improvement of the present invention, the inspection fixture positioning block comprises:

[0025] A positioning block body, the first end of which is fixed on the detection lifting device, and the two side surfaces of the other end of which are inclined toward the center position;

[0026] A positioning groove is arranged at the top of the positioning block body and passes through the left and right end faces, and the width of the positioning groove is adapted to the thickness of the blade.

[0027] As a further improvement of the present invention, the detection lifting device comprises:

[0028] Lifting bracket;

[0029] A lifting power assembly, the lifting power assembly is fixed to one end of the lifting bracket;

[0030] The lifting base is movably arranged on the lifting bracket, and the output end of the lifting power component is fixedly connected to the lifting base.

[0031] As a further improvement of the present invention, the lifting base is provided with an avoidance position, the servo motor is fixed below the lifting base, the rotating shaft is located in the avoidance position, the inspection fixture positioning block is fixed above the lifting base, and when the bending part of the blade is close to the right end face of the positioning groove, the bending part of the blade is located on the central axis of the rotating shaft.

[0032] As a further improvement of the present invention, a column is provided at the top of the end of the detection swing arm, and the detection probe is provided on the column.

[0033] A machete device, comprising:

[0034] A bending device, used to bend the long straight blade at a set angle;

[0035] A shearing device, used for cutting the bent blade from the long blade strip;

[0036] and the aforementioned scimitar angle detection device;

[0037] The curved blade angle detection device is arranged between the bending device and the shearing device in a liftable manner.

[0038] As a further improvement of the present invention, the bending mold of the bending device is provided with a bending groove for passing the blade, and the shearing device is provided with a fixing groove for fixing the blade. When the bending mold is not rotated for bending, the bending groove, positioning groove and fixing groove are located on the same plane.

[0039] The embodiments of the present application have the following technical effects: the structure of the present invention is reasonable and ingenious, and a switch circuit is set. When the detection probe touches the blade, the switch circuit is turned on and a signal is sent. The encoder integrated with the servo motor feeds back the rotation angle of the servo motor and other parameters to the host computer in real time. It is sensitive, fast and highly accurate. The bending knife device can derive the bending angle of the blade according to the fedback rotation angle. If the bending angle does not match the set bending angle, is too large or too small, the difference is compensated to the bending angle of the bending knife device, and the bending device is controlled to bend according to the adjusted parameters, so that the bending angle of the blade meets the set requirements, reducing the requirements for adjusting the blade bending angle in the subsequent knife installation process, thereby reducing the dependence on the knife installation master, so that ordinary workers can meet the knife installation requirements, reducing labor costs, shortening the knife installation time, and reducing production costs.

[0040] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a schematic diagram of the three-dimensional structure of the scimitar angle detection device in the present invention;

[0043] Figure 2 It is a structural schematic diagram of the machete device in the present invention;

[0044] Figure 3 is a top view of the present invention when detecting a straight state of the blade;

[0045] Figure 4 is a top view of the present invention when detecting the bending state of the blade;

[0046] Figure 5 It is a schematic diagram of the detection of the present invention;

[0047] Figure 6 It is a structural schematic diagram of the positioning block of the inspection tool in the present invention;

[0048] Figure 7 It is a schematic diagram of the structure of the detection component in the present invention;

[0049] Figure 8 It is a structural schematic diagram of the detection lifting device in the present invention;

[0050] Fig. 9 It is a schematic diagram of an implementation mode of the switch circuit in the present invention;

[0051] Fig.10 It is a schematic diagram of another embodiment of the switch circuit in the present invention;

[0052] Fig.11 yes Fig.10 A schematic diagram of the structure of a probe in an implementation manner. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0054] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0057] like Figures 1 to 8 As shown, the embodiment of the first aspect of the present application provides a method for detecting a scimitar angle, which comprises the following steps:

[0058] The detection probe 23 is fixed to the rotating shaft of the servo motor 21 through the detection swing arm 22;

[0059] The gauge positioning block 1 for positioning the blade is arranged above or below the servo motor 21;

[0060] A switch circuit is set, and when the detection probe 23 touches the blade, the switch circuit is closed and a signal is sent;

[0061] Before the blade is bent, the blade is placed on the inspection fixture positioning block 1, the servo motor 21 is rotated, the detection probe 23 contacts the blade, the switch circuit sends a signal, the contact point of the detection probe 23 and the blade is position 1, and the rotation angle W1 relative to the zero position of the servo motor 21 is recorded;

[0062] After the blade is bent, the blade is placed on the inspection fixture positioning block 1, and the bending part of the blade is located on the central axis of the rotating shaft 211 of the servo motor 21. The servo motor 21 is rotated, and the detection probe 23 contacts the bending section of the blade. The switch circuit sends a signal, and the contact point of the detection probe 23 and the bending section of the blade is position 2. The rotation angle W2 relative to the zero position of the servo motor 21 is recorded;

[0063] The formulas of bending angle A=W2-W1 and bending supplementary angle B=180-(W2-W1) can be used to calculate whether the actual bending angle of the blade meets the requirements. If it is too small or too large, the difference will be fed back to the equipment for secondary bending until the bending angle meets the requirements.

[0064] like Fig. 9 As shown, the detection probe 23 and the blade 5 are switches. When the detection probe 23 and the blade 5 are in contact, the switch circuit is closed and a signal is sent. In this embodiment, the detection probe 23 and the blade 5 are conductors. The detection probe 23, the blade 5 and the host computer form a loop. The detection probe 23 and the blade 5 act as switches. When the detection probe 23 contacts the blade 5, the circuit is turned on and an electrical signal is output to the host computer. The host computer obtains the electrical signal to record the rotation angle of the servo motor 21. The electrical signal can be a positive voltage or a negative voltage, and the voltage value can also be different. The servo motor 21 enables the position mode and sets a suitable speed to control the movement of the motor. The detection probe 23 and the blade are connected in series to a switch circuit as a switch (contact means the switch is closed; separation means the switch is disconnected). When the detection probe 23 just touches the blade during the movement, the circuit is closed and a signal is obtained. The host computer obtains the electrical signal to record the rotation angle of the servo motor 21.

[0065] like Fig.10 , Fig.11As shown, the detection probe 23 is a switch, and the detection probe 23 is provided with a probe 231. When the probe 231 touches the blade 5, the switch circuit is closed and a signal is sent. In this embodiment, the detection probe 23 and the host computer are connected in series to form a loop. The detection probe 23 is provided with a probe 231, and the detection probe 23 is similar to a Renishaw probe. When the probe 231 contacts the blade 5, the circuit is turned on and a signal is output to the host computer. The host computer obtains the signal and records the rotation angle of the servo motor 21. The electrical signal can be a positive voltage or a negative voltage, and the voltage values ​​can also be different.

[0066] As a further improvement of the present invention, the bent blade is transported toward the shearing device 7, and the lifting power assembly 32 drives the lifting base 35 to rise, avoiding the bent section and allowing the straight section 51 to fall into the positioning groove 13 for positioning; after the measurement of the curved blade angle is completed, the lifting power assembly 32 drives the lifting base 35 to descend, and the blade leaves the positioning groove 13 and continues to be transported toward the shearing device 7.

[0067] like Figure 5 As shown, before the blade is bent (in a straight state), the detection probe 23 is contacted to stop it, and the actual position of the servo motor 21 is recorded as position 1 (the angle value relative to the motor zero position), and the rotation angle of the servo motor 21 is W1; after the blade is bent (in a bent state), the detection probe 23 is contacted to stop it, and the actual position of the motor is recorded as position 2 (the angle value relative to the motor zero position), and the rotation angle of the servo motor 21 is W2; the bending angle of the blade can be obtained later through position 1 and position 2. That is, the actual bending angle of the blade can be calculated by the formula of bending angle A = W2-W1, bending supplementary angle B = 180-(W2-W1).

[0068] In this detection method, the torque of the servo motor 21 is easy to control and adjust, and the control range is large and the accuracy is high;

[0069] The motor and encoder are integrated, and the feedback accuracy is high; this detection method does not have the problem of motor response speed.

[0070] A scimitar angle detection device, comprising:

[0071] The gauge positioning block 1 is used to position the straight section of the blade, so as to facilitate the measurement of the angle between the straight section 51 and the bent section 52 of the blade 5;

[0072] The detection component 2 is arranged above or below the gauge positioning block 1 , and the detection component 2 can touch the wall surface of the bending section after rotating; in this embodiment, the detection component 2 is located below the gauge positioning block 1 .

[0073] And a detection lifting device 3, the inspection fixture positioning block 1 and the detection component 2 are arranged on a lifting base 35 of the detection lifting device 3, and are driven to rise or fall by the detection lifting device 3.

[0074] As a further improvement of the present invention, the detection component 2 includes:

[0075] A servo motor 21, wherein the servo motor 21 rotates to drive the detection assembly 2 to rotate, and the blade bending angle is calculated according to the rotation angle of the servo motor 21;

[0076] The servo motor 21 and the encoder are integrated, or a separate structure can be adopted. The encoder collects parameters such as the rotation angle of the servo motor 21 in the bending angle detection and feeds them back to the host computer, so as to determine whether the bending angle of the blade meets the requirements. If not, the difference is obtained, and the bending angle is controlled according to the difference, so that the blade angle can be bent more accurately.

[0077] The host computer can be a separate control chip such as a single-chip microcomputer, or a control system built into the machete machine. Therefore, the machete angle detection device in this application can be used as a separate device to detect the bending angle of the blade, or it can be integrated into the machete machine to form a machete device for use.

[0078] In some other embodiments, the motor may be a coreless motor, so that the friction of the internal structure of the motor is smaller and the movement speed is faster.

[0079] A detection swing arm 22, the head end of which is fixed on the rotating shaft 211 of the servo motor 21;

[0080] The detection probe 23 is disposed on the detection swing arm 22. After the detection swing arm 22 swings, the detection probe 23 can touch the wall surface of the bending section.

[0081] When the blade is placed in the positioning groove, the blade can be located above or below the detection swing arm 22. When the detection swing arm 22 swings, the blade will not touch the detection swing arm 22. In this embodiment, the blade is located above the detection swing arm 22. The detection probe 23 can be fixed to the top, side wall or end of the detection swing arm 22. As long as a part of the detection probe 23 is at the same level as the blade, when the detection swing arm 22 rotates, the blade will touch the detection probe 23.

[0082] In this embodiment, the detection probe 23 may be a cylinder or a sphere.

[0083] As a further improvement of the present invention, the inspection fixture positioning block 1 comprises:

[0084] The positioning block body 11, the head end of the positioning block body 11 is fixed on the detection lifting device 3, and the two side surfaces of the other end of the positioning block body 11 are set as inclined surfaces 12 toward the center position; by setting the two side surfaces of the other end of the positioning block body 11 as inclined surfaces 12, a tip is formed, so that the positioning block body 11 is smaller in size, which is convenient for the application to be installed in the limited space of the bending machine, and realizes the automated assembly line operation of blade bending, online angle detection and cutting, thereby improving production efficiency.

[0085] The positioning groove 13 is arranged at the top of the positioning block body 11 and passes through the left and right end faces. The width of the positioning groove 13 is adapted to the thickness of the blade. The width of the positioning groove 13 is adapted to the thickness of the blade. The blade is placed in the positioning groove 13 without shaking, thereby improving the accuracy of angle detection.

[0086] When the angle of the scimitar is detected, the straight section 51 of the blade is placed in the positioning groove 13, and the bent section 52 of the blade is located at the right end of the positioning groove 13. At this time, the bent part of the blade overlaps with the central axis of the rotating shaft 211 of the servo motor 21. In some embodiments, one end of the straight section 51 of the blade can extend out of the left end of the positioning groove 13 and extend all the way to the bending mold of the bending device; in some other embodiments, one end of the straight section 51 of the blade can be located in the positioning groove 13.

[0087] As a further improvement of the present invention, the detection lifting device 3 includes:

[0088] Lifting bracket 31;

[0089] The lifting power assembly 32 is fixed to one end of the lifting bracket 31; the lifting power assembly 32 can be a motor transmission structure, a cylinder transmission structure, etc. In the present application, the lifting power assembly 32 includes a lifting motor 321, a screw rod 322 connected to the rotating shaft 211 of the lifting motor 321, and a rotating block threadedly matched with the screw rod 322 is provided on the screw rod 322, and the rotating block is fixedly connected to the lifting base 35 through a mounting plate 324. The lifting motor 321 is fixed to the lifting bracket 31. The lifting bracket 31 is also provided with a guide rail 325, and the mounting plate 324 is provided with a slider 326 matched with the guide rail 325.

[0090] The lifting base 35 is movably arranged on the lifting bracket 31, and the output end of the lifting power assembly 32 is fixedly connected to the lifting base 35. As a further improvement of the present invention, the lifting base 35 is provided with an avoidance position, the servo motor 21 is fixed below the lifting base 35, the rotating shaft 211 is located in the avoidance position, and the inspection fixture positioning block 1 is fixed above the lifting base 35. When the bending part of the blade is close to the right end surface of the positioning groove 13, the bending part of the blade is located on the central axis of the rotating shaft 211.

[0091] The lifting base 35 is a square block, and the lower surface of the lifting base 35 is provided with a plurality of holes for fixing the servo motor 21. The avoidance position 311 is a circular through hole, and the two ends of the circular through hole are respectively set as countersunk holes. In this embodiment, the entirety or the lower part of the detection swing arm 22 is placed in the avoidance position 311, further reducing the space occupied by the scimitar angle detection device.

[0092] As a further improvement of the present invention, a column 24 is provided at the top of the end of the detection swing arm 22, and the detection probe 23 is provided on the column 24. The detection probe 23 can be fixedly connected to the column 24; or it can be movably arranged on it, and the detection probe 23 overlaps with the central axis of the column 24, and the detection probe 23 can rotate.

[0093] A machete device, comprising:

[0094] A bending device 8, used to bend the long straight blade at a set angle;

[0095] A shearing device 7, used to cut the bent blade from the long blade;

[0096] and the aforementioned scimitar angle detection device 6;

[0097] The curved blade angle detection device 6 is arranged between the bending device 8 and the shearing device 7 in a liftable manner.

[0098] The bending device 8 and the shearing device 7 are prior art in the art, and the blade is bent at a set angle by a bending die of the bending device 8;

[0099] The curved blade angle detection device 6 detects the angle formed after bending. If the detected angle does not match the preset angle, the parameters are fed back to the host computer to adjust the bending angle of the bending device 8 so that a qualified blade can be bent. If the detected angle is consistent with the preset angle, the shearing device 7 shears the bent blade to the preset length.

[0100] As a further improvement of the present invention, the bending mold of the bending device 8 is provided with a bending groove for passing the blade, and the shearing device 7 is provided with a fixing groove for fixing the blade. When the bending mold is not rotated for bending, the bending groove, the positioning groove 13 and the fixing groove are located on the same plane.

[0101] The structure of the present invention is reasonable and ingenious. Setting the torque limit value of the servo motor 21 can avoid applying excessive external force to the blade, causing deformation of the blade and affecting the accuracy of the monitoring data. When the detection probe 23 contacts the blade and reaches the torque limit value, the servo motor 21 stops rotating, and the encoder integrated with the servo motor 21 feeds back the rotation angle and other parameters of the servo motor 21 to the host computer in real time. It is sensitive, fast and highly accurate. The bending knife device can derive the bending angle of the blade according to the fedback rotation angle. If the bending angle does not match the set bending angle, is too large or too small, the difference is compensated to the bending angle of the bending knife device, and the bending device 8 is controlled to bend according to the adjusted parameters, so that the bending angle of the blade meets the set requirements, reducing the requirements for adjusting the blade bending angle in the subsequent knife installation process, thereby reducing the dependence on the knife installation master, so that ordinary workers can meet the knife installation requirements, reducing labor costs, shortening the knife installation time, and reducing production costs.

[0102] The above is only a preferred embodiment of the present application and does not constitute any formal limitation to the present application. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present application by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the present application, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present application without departing from the content of the technical solution of the present application should be included in the protection scope of the present application.

Claims

1. A method for detecting a scimitar angle, characterized in that: A scimitar device is included, the scimitar device comprising: A bending device, used to bend the long straight blade at a set angle; A shearing device, used for cutting the bent blade from the long blade strip; and a scimitar angle detection device; the scimitar angle detection device is escalably disposed between the bending device and the shearing device; The scimitar angle detection device comprises: The gauge positioning block is used to position the straight section of the blade, so as to facilitate the measurement of the angle between the straight section and the bent section of the blade; A detection component, which is arranged above or below the positioning block of the inspection tool, and can touch the wall surface of the bending section after the detection component is rotated; and a detection lifting device, wherein the inspection fixture positioning block and the detection assembly are arranged on a lifting base of the detection lifting device and are driven to rise or fall by the detection lifting device; The detection component comprises: A servo motor, the rotation of which drives the detection assembly to rotate, and the blade bending angle is calculated according to the rotation angle of the servo motor; A detection swing arm, the head end of which is fixed on the rotating shaft of the servo motor; A detection probe, which is arranged on the detection swing arm, and after the detection swing arm swings, the detection probe can touch the wall surface of the bending section; The inspection fixture positioning block comprises: A positioning block body, the first end of which is fixed on the detection lifting device, and the two side surfaces of the other end of which are inclined toward the center position; A positioning groove, which is arranged at the top of the positioning block body and runs through the left and right end surfaces, and the width of the positioning groove is adapted to the thickness of the blade; It includes the following steps: Fix the detection probe on the rotating shaft of the servo motor through the detection swing arm; A gauge positioning block for positioning the blade is arranged above or below the servo motor; Set a switch circuit, when the detection probe touches the blade, the switch circuit is closed and a signal is sent; Before the blade is bent, the blade is placed on the positioning block of the inspection fixture, the servo motor is rotated, the detection probe contacts the blade, the switch circuit sends a signal, the contact point between the detection probe and the blade is position 1, and the rotation angle W1 relative to the zero position of the servo motor is recorded; After the blade is bent, the blade is placed on the positioning block of the inspection fixture, and the bending part of the blade is located on the central axis of the servo motor rotating shaft. The servo motor is rotated, and the detection probe contacts the bending section of the blade. The switch circuit sends a signal, and the contact point between the detection probe and the bending section of the blade is position 2. The rotation angle W2 relative to the zero position of the servo motor is recorded; The formula of bending angle A=W2-W1, bending supplementary angle B=180-(W2-W1) can be used to calculate whether the actual bending angle of the blade meets the requirements. If it is too small or too large, the difference will be fed back to the equipment for secondary bending until the bending angle meets the requirements. The bent blade is transported toward the shearing device, and the lifting power assembly drives the lifting base to rise, avoiding the bent section and positioning the straight section in the positioning groove; after the curved blade angle measurement is completed, the lifting power assembly drives the lifting base to descend, and the blade leaves the positioning groove and continues to be transported toward the shearing device.

2. The method for detecting the angle of a scimitar according to claim 1, characterized in that: The detection probe and the blade are switches. When the detection probe and the blade are in contact, the switch circuit is closed and a signal is sent out. Or the detection probe is a switch, which is provided with a probe. When the probe touches the blade, the switch circuit is closed and a signal is sent out.

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