A device and method for detecting broken blade of special-shaped knife

Abstract

The present invention relates to a device for detecting broken blades of special-shaped knives. The detection device comprises a workbench, a numerical control frame and a tool, wherein the numerical control frame is connected to the surface of the workbench, the tool is installed on the numerical control frame, a contact mechanism is provided on one side of the tool, the contact mechanism comprises a mounting block, an elastic telescopic member, a sliding member and a detection roller, a groove is provided inside the mounting block, one end of the elastic telescopic member is connected to the surface of the groove, and the other end is connected to one end of the sliding member, one end of the sliding member extends outside the groove and is fixedly connected to a transverse frame, and the detection roller is rotatably connected to the inner wall of the transverse frame; the detection device is provided with a detection roller, and the detection roller is attached to the peak line of the blade, and the detection roller is pushed to move along the peak line so as to fully contact the blade, and then the elastic telescopic member, the sliding member and the displacement detection mechanism cooperate to detect whether there is a notch on the blade, the whole device has a simple structure and accurate detection, and is convenient to use.

Description

Technical Field

[0001] The invention belongs to the technical field of blade detection, and in particular relates to a device and method for detecting broken blades of special-shaped knives. Background Art

[0002] Milling machines mainly refer to machine tools that use milling cutters to process various surfaces of workpieces. Usually, the main motion is the rotation of the milling cutter, and the movement of the workpiece and the milling cutter is the feed motion. It can process planes, grooves, various curved surfaces, gears, etc. Before the milling cutter performs milling on the workpiece, it is usually necessary to align the cutter to ensure the processing accuracy and surface flatness of the machined parts.

[0003] The basic principle of the existing contact tool setting instrument is based on mechanical contact measurement. It uses a probe made of hard material to contact the tool through a certain force, so as to measure the tool's position, length, deviation and other parameters. This kind of detection is performed on the entire tool, and it cannot detect whether there is a notch (i.e. broken edge) on each cutting edge of the tool. Therefore, a device is designed to solve this problem. Summary of the invention

[0004] The purpose of the present invention is to provide a detection device with simple structure and reasonable design in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] The first aspect of the present invention discloses a device for detecting broken edges of special-shaped knives, comprising a workbench, a CNC frame and a tool, wherein the CNC frame is connected to the surface of the workbench, the tool is installed on the CNC frame, a contact mechanism is provided on one side of the tool, the contact mechanism comprises a mounting block, an elastic telescopic member, a sliding member and a detection roller, a groove is provided inside the mounting block, one end of the elastic telescopic member is connected to the surface of the groove, and the other end is connected to one end of the sliding member, one end of the sliding member extends out of the groove and is fixedly connected to a transverse frame, the detection roller is rotatably connected to the inner wall of the transverse frame, a displacement detection mechanism is provided inside the mounting block, the detection roller is pressed on the blade of the tool and rolls along the peak line of the blade, and the displacement detection mechanism is used to detect the movement of the sliding member to detect the broken edge of the blade.

[0007] As a further optimization scheme of the present invention, the sliding part includes a columnar portion, an abutment portion and a connecting portion, the connecting portion is connected to one end of the columnar portion located in the groove, the abutment portion is located outside the groove and is sleeved on the surface of the columnar portion, and one end of the columnar portion away from the elastic telescopic part is connected to the surface of the cross frame.

[0008] As a further optimization solution of the present invention, the elastic telescopic member is a spring.

[0009] As a further optimization scheme of the present invention, the displacement detection mechanism includes a warning light, piston 1 and piston 2, an empty slot 1 is provided inside the mounting block, the end of the empty slot 1 close to the groove is slidably connected to piston 1, and the other end is slidably connected to piston 2, a solution is filled between piston 1 and piston 2, an empty slot 2 connected to the empty slot 1 is provided in the mounting block, the warning light is installed on the surface of the mounting block, two groups of conductive blocks 1 are connected to the surface of the empty slot 2 away from the empty slot 1, a moving block is slidably connected to the inner wall of the empty slot 2, the moving block is connected to the end of the piston 2 away from the solution, and conductive blocks 2 corresponding to the two groups of conductive blocks 1 are embedded on the moving block.

[0010] As a further optimization solution of the present invention, the cross-sectional area of ​​the end of the hollow groove 1 close to the piston 2 is smaller than the cross-sectional area of ​​the end close to the piston 1.

[0011] As a further optimization scheme of the present invention, a driving mechanism is provided on the surface of the workbench for driving the contact mechanism to move, the driving mechanism includes a mounting frame, a longitudinal driving assembly, an oblique driving assembly and a flipping assembly, the mounting frame slides along the surface of the workbench, the longitudinal driving assembly includes a driving member 1, a moving seat and a rotating seat, the rotating seat is rotatably connected to the moving seat via a rotating shaft, the rotating shaft passes through the moving seat, the end of the rotating shaft away from the rotating seat is connected to the driving end of the flipping assembly, the driving member 1 drives the moving seat to slide along the surface of the mounting frame, and at the same time, the flipping assembly drives the rotating seat to rotate, and the oblique driving assembly is connected to the rotating seat to drive the detection roller to move along the peak line of the blade.

[0012] As a further optimization scheme of the present invention, the oblique driving assembly includes a driving member 2 and a base, the driving member 2 is connected to the rotating seat, the base is connected to the driving end of the driving member 2, and the mounting block is connected to the surface of the base.

[0013] As a further optimization solution of the present invention, the flip assembly includes a gear and a rack, the rack is connected to the surface of the mounting frame, the gear is fixedly connected to the end of the shaft away from the rotating seat, and the gear is meshed with the rack.

[0014] As a further optimization solution of the present invention, the contact mechanism is provided in multiple groups, and the multiple groups of contact mechanisms are arranged in one-to-one correspondence with the multiple groups of adjacent blades of the tool.

[0015] The second aspect of the present invention discloses a method for using a device for detecting broken edges of special-shaped knives. The device for detecting broken edges of special-shaped knives as described above is used to detect broken edges, and the method comprises the following steps:

[0016] S1, installing the tool on the CNC frame, and the CNC frame controls the tool to move to the detection end of the detection device;

[0017] S2, move the mounting frame to move the detection roller of the contact mechanism to the peak line of the tool blade until the abutment portion of the sliding member is attached to the surface of the mounting block. At this time, the conductive block 2 contacts the two sets of conductive blocks 1 to light up the warning light;

[0018] S3, start the second driving member to drive the detection roller to move along the peak line of the upper blade. During the movement, if there is a notch on the blade, the elastic telescopic member drives the second conductive block away from the two groups of first conductive blocks. At this time, the prompt light goes out. If there is no notch on the blade, the prompt light stays on until the detection roller is away from the blade.

[0019] S4, the CNC frame controls the tool to rotate so that the detection roller detects all the upper blades of the tool;

[0020] S5. After inspecting the upper blade of the tool, restore the second driving member and the mounting frame;

[0021] S6, start the driving member 1 to drive the moving seat to move upward, and at the same time, the rack cooperates with the gear to drive the rotating seat to rotate, so that the contact mechanism is turned over as a whole, and then repeat steps S2 to S5 to complete the detection of the lower side blade of the tool.

[0022] The beneficial effects of the present invention are as follows: the present invention is provided with a detection roller, and the detection roller is attached to the peak line of the blade. By pushing the detection roller to move along the peak line so that it fully contacts the blade, and then through the cooperation of the elastic telescopic part, the sliding part and the displacement detection mechanism, it is detected whether there is a notch on the blade. The whole device has a simple structure and accurate detection, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a partial enlarged view of the contact structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the internal structure of the mounting block of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the second driving member of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the turnover mechanism of the present invention.

[0028] In the figure: 1. workbench; 2. CNC frame; 3. tool; 4. contact mechanism; 41. mounting block; 42. elastic telescopic member; 43. sliding member; 431. columnar portion; 432. abutting portion; 433. connecting portion; 44. detection roller; 45. horizontal frame; 46. groove; 5. displacement detection mechanism; 51. warning light; 52. piston one; 53. piston two; 54. empty slot one; 55. empty slot two; 56. conductive block one; 57. conductive block two; 58. moving block; 6. mounting frame; 7. longitudinal drive assembly; 71. drive member one; 72. moving seat; 73. rotating seat; 8. oblique drive assembly; 81. drive member two; 82. base; 9. flip assembly; 91. gear; 92. rack. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0030] Embodiment 1

[0031] refer to Figures 1 to 3 A device and method for detecting broken blades of special-shaped knives include a workbench 1, a numerical control frame 2 and a tool 3. The numerical control frame 2 is connected to the surface of the workbench 1, and the tool 3 is installed on the numerical control frame 2. A contact mechanism 4 is provided on one side of the tool 3. The contact mechanism 4 includes a mounting block 41, an elastic telescopic member 42, a sliding member 43 and a detection roller 44. A groove 46 is provided inside the mounting block 41. One end of the elastic telescopic member 42 is connected to the surface of the groove 46, and the other end is connected to one end of the sliding member 43. One end of the sliding member 43 extends outside the groove 46 and is fixedly connected to a horizontal frame 45. The detection roller 44 is rotatably connected to the inner wall of the horizontal frame 45. A displacement detection mechanism 5 is provided in the mounting block 41. The detection roller 44 presses on the blade of the tool 3 and rolls along the peak line of the blade. The displacement detection mechanism 5 is used to detect the movement of the sliding member 43 to detect the broken blade of the blade.

[0032] The invention of this embodiment is suitable for detecting double-angle milling cutters and single-angle milling cutters, and can be used together with a tool setting instrument to detect the tool 3.

[0033] It should be noted that the axis of the detection roller 44 is perpendicular to the peak line of the blade.

[0034] Furthermore, the sliding member 43 includes a columnar portion 431, an abutment portion 432 and a connecting portion 433. The connecting portion 433 is connected to one end of the columnar portion 431 located in the groove 46, the abutment portion 432 is located outside the groove 46 and is sleeved on the surface of the columnar portion 431, and one end of the columnar portion 431 away from the elastic telescopic member 42 is connected to the surface of the horizontal frame 45.

[0035] It should be noted that the axis of the columnar portion 431 is perpendicular to the peak line of the blade.

[0036] Furthermore, the elastic telescopic member 42 is a spring.

[0037] In actual use, a spring with less elasticity needs to be used.

[0038] Furthermore, the displacement detection mechanism 5 includes a warning light 51, a piston 1 52 and a piston 2 53. An empty slot 1 54 is provided inside the mounting block 41. The end of the empty slot 1 54 close to the groove 46 is slidably connected to the piston 1 52, and the other end is slidably connected to the piston 2 53. A solution is filled between the piston 1 52 and the piston 2 53. An empty slot 2 55 connected to the empty slot 1 54 is provided in the mounting block 41. The warning light 51 is installed on the surface of the mounting block 41. The surface of the empty slot 2 55 away from the empty slot 1 54 is connected to two groups of conductive blocks 1 56. The inner wall of the empty slot 2 55 is slidably connected to a moving block 58. The moving block 58 is connected to the end of the piston 2 53 away from the solution. The moving block 58 is embedded with a conductive block 2 57 corresponding to the two groups of conductive blocks 1 56.

[0039] It should be noted that the solution can be water, lubricating oil, etc.

[0040] It should be further explained that for the filling of the solution, the specific operation is that two groups of through holes connected to the empty groove 54 can be opened on the surface of the mounting block 41, and a valve (either an electronic valve or a one-way valve) can be installed at one group of through holes, and the through holes therein are used to inject the solution, and a one-way valve needs to be installed at the other group of through holes to discharge the gas. Before filling, the piston 52 should be at the farthest position away from the groove 46, and the surface of the abutment portion 432 of the sliding member 43 should be attached to the surface of the mounting block 41. For details, please refer to Figure 3 The position status of the two.

[0041] In actual use, the contact mechanism 4 is moved so that the detection roller 44 is located at one end of the blade front line, and the contact mechanism 4 is pressed to compress the spring (in this state, the surface of the abutment portion 432 of the sliding member 43 should be attached to the surface of the mounting block 41). At this time, the piston 1 52 drives the conductive block 2 57 to contact the two groups of conductive blocks 1 56, so that the prompt light 51 lights up, and then the detection roller 44 is moved along the blade front line. During the movement, if there is a notch on the blade, the compressed spring will move the conductive block 2 57 away from the two groups of conductive blocks 1 56. At this time, the prompt light 51 goes out, and the detection result is that the tool 3 has a broken blade. If the prompt light 51 is always on, it means that the tool 3 does not have a broken blade.

[0042] It should be noted that the warning light 51 is connected to the power supply through the neutral wire, and the power supply and the warning light 51 are respectively connected to the two groups of conductive blocks 1 56 through the live wire, so when the conductive block 2 57 contacts the two groups of conductive blocks 1 56, the warning light 51 lights up.

[0043] It should be further explained that the conductive block 1 56 and the conductive block 2 57 are both made of materials with good conductivity, specifically, silver, copper, aluminum and the like.

[0044] Furthermore, the cross-sectional area of ​​the slot 1 54 at the end close to the piston 2 53 is smaller than the cross-sectional area at the end close to the piston 1 52 .

[0045] It should be noted that, since the cross-sectional area of ​​the slot 1 54 near the end of the piston 2 53 is smaller than the cross-sectional area near the end of the piston 1 52 , when the piston 2 53 moves, the distance moved by the piston 1 52 is much greater than the distance moved by the piston 2 53 .

[0046] refer to Figure 2 , Figure 4 and Figure 5 A driving mechanism is provided on the surface of the workbench 1 for driving the contact mechanism 4 to move. The driving mechanism includes a mounting frame 6, a longitudinal driving assembly 7, an oblique driving assembly 8 and a flipping assembly 9. The mounting frame 6 slides along the surface of the workbench 1. The longitudinal driving assembly 7 includes a driving member 71, a moving seat 72 and a rotating seat 73. The rotating seat 73 is rotatably connected to the moving seat 72 through a rotating shaft. The rotating shaft passes through the moving seat 72. The end of the rotating shaft away from the rotating seat 73 is connected to the driving end of the flipping assembly 9. The driving member 71 drives the moving seat 72 to slide along the surface of the mounting frame 6. At the same time, the flipping assembly 9 drives the rotating seat 73 to rotate. The oblique driving assembly 8 is connected to the rotating seat 73 to drive the detection roller 44 to move along the peak line of the blade.

[0047] It should be noted that a slide rail is provided on the surface of the workbench 1 , and a driving component 3 is connected to the workbench 1 for driving the mounting frame 6 to move along the surface of the slide rail.

[0048] Furthermore, the oblique driving assembly 8 includes a second driving member 81 and a base 82 , the second driving member 81 is connected to the rotating seat 73 , the base 82 is connected to the driving end of the second driving member 81 , and the mounting block 41 is connected to the surface of the base 82 .

[0049] Furthermore, the flip assembly 9 includes a gear 91 and a rack 92 . The rack 92 is connected to the surface of the mounting frame 6 . The gear 91 is fixedly connected to one end of the rotating shaft away from the rotating seat 73 . The gear 91 is meshed with the rack 92 .

[0050] It should be noted that when the longitudinal drive assembly 7 drives the movable seat 72 to move upward, the rack 92 cooperates with the gear 91 to drive the rotating seat 73 to rotate, thereby driving the contact mechanism 4 to rotate (the rotation angle is 180°). After rotation, the contact mechanism 4 can detect the blade on the other side of the double-angle milling cutter.

[0051] Furthermore, a plurality of contact mechanisms 4 are provided, and the plurality of contact mechanisms 4 are arranged in one-to-one correspondence with the plurality of adjacent blades of the tool 3 .

[0052] In this embodiment, the number of the contact mechanisms 4 cannot exceed one quarter of the number of the cutting edges of the tool 3 .

[0053] In another embodiment, the number of contact mechanisms 4 may also be one group. One group of contact mechanisms 4 can detect the blades of a multi-blade tool 3 in sequence, and can also detect a tool 3 with only one blade, which has a wider scope of application.

[0054] It should be further explained that when the contact mechanism 4 is provided with multiple groups, when the connection between the multiple groups of warning lights 51 in the displacement detection mechanism 5 connected to the contact mechanism 4 is a parallel connection, it can be specifically detected which blade of the tool 3 has a broken edge. When the connection between the multiple groups of warning lights 51 is a series connection, it can only be detected whether the tool 3 as a whole has a broken edge. The connection method between the multiple groups of warning lights 51 can be selected according to the actual situation.

[0055] Embodiment 2

[0056] refer to Figures 1 to 5 A method for using a device for detecting broken blades of special-shaped knives is disclosed. The device for detecting broken blades of special-shaped knives disclosed in the first embodiment is used to detect broken blades, and the method comprises the following steps:

[0057] S1, installing the tool on the CNC frame, and the CNC frame controls the tool to move to the detection end of the detection device;

[0058] S2, move the mounting frame to move the detection roller of the contact mechanism to the peak line of the tool blade until the abutment portion of the sliding member is attached to the surface of the mounting block. At this time, the conductive block 2 contacts the two sets of conductive blocks 1 to light up the warning light;

[0059] S3, start the second driving member to drive the detection roller to move along the peak line of the upper blade. During the movement, if there is a notch on the blade, the elastic telescopic member drives the second conductive block away from the two groups of first conductive blocks. At this time, the prompt light goes out. If there is no notch on the blade, the prompt light stays on until the detection roller is away from the blade.

[0060] S4, the CNC frame controls the tool to rotate so that the detection roller detects all the upper blades of the tool;

[0061] S5. After inspecting the upper blade of the tool, restore the second driving member and the mounting frame;

[0062] S6, start the driving member 1 to drive the moving seat to move upward, and at the same time, the rack cooperates with the gear to drive the rotating seat to rotate, so that the contact mechanism is turned over as a whole. At this time, repeat steps S2 to S5 to complete the detection of the lower blade of the tool.

[0063] In this embodiment, the driving member 1 71 , the driving member 2 81 and the driving member 3 are any mechanical structure capable of linear motion, and specifically, may be an electric push rod, a hydraulic cylinder, a pneumatic cylinder, and the like.

[0064] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A device for detecting broken blades of special-shaped knives, characterized in that: The invention comprises a workbench (1), a numerical control frame (2) and a tool (3), wherein the numerical control frame (2) is connected to the surface of the workbench (1), the tool (3) is mounted on the numerical control frame (2), a contact mechanism (4) is provided on one side of the tool (3), the contact mechanism (4) comprises a mounting block (41), an elastic telescopic member (42), a sliding member (43) and a detection roller (44), a groove (46) is provided inside the mounting block (41), one end of the elastic telescopic member (42) is connected to the groove (46), and a contact mechanism (44) is provided on one side of the tool (3). ) on the surface of the tool (3), the other end of which is connected to one end of a sliding member (43); one end of the sliding member (43) extends outside the groove (46) and is fixedly connected to a transverse frame (45); the detection roller (44) is rotatably connected to the inner wall of the transverse frame (45); a displacement detection mechanism (5) is provided in the mounting block (41); the detection roller (44) is pressed against the blade of the tool (3) and rolls along the peak line of the blade; the displacement detection mechanism (5) is used to detect the movement of the sliding member (43) to detect the broken blade of the blade.

2. The device for detecting broken edges of special-shaped knives according to claim 1, characterized in that: The sliding member (43) comprises a columnar portion (431), an abutting portion (432) and a connecting portion (433); the connecting portion (433) is connected to one end of the columnar portion (431) located in the groove (46); the abutting portion (432) is located outside the groove (46) and sleeved on the surface of the columnar portion (431); and one end of the columnar portion (431) away from the elastic telescopic member (42) is connected to the surface of the transverse frame (45).

3. A device for detecting broken edges of special-shaped knives according to claim 1 or 2, characterized in that: The elastic telescopic member (42) is a spring.

4. The device for detecting broken edges of special-shaped knives according to claim 2, characterized in that: The displacement detection mechanism (5) comprises a warning light (51), a piston 1 (52) and a piston 2 (53). An empty slot 1 (54) is provided inside the mounting block (41). The end of the empty slot 1 (54) close to the groove (46) is slidably connected to the piston 1 (52), and the other end is slidably connected to the piston 2 (53). A solution is filled between the piston 1 (52) and the piston 2 (53). An empty slot 2 (55) connected to the empty slot 1 (54) is provided inside the mounting block (41). The warning light (51) is mounted on the surface of the mounting block (41). The surface of the empty slot 2 (55) away from the empty slot 1 (54) is connected to two groups of conductive blocks 1 (56). The inner wall of the empty slot 2 (55) is slidably connected to a moving block (58). The moving block (58) is connected to the end of the piston 2 (53) away from the solution. The moving block (58) is embedded with conductive blocks 2 (57) corresponding to the two groups of conductive blocks 1 (56).

5. The device for detecting broken edges of special-shaped knives according to claim 4, characterized in that: The cross-sectional area of ​​the end of the hollow groove 1 (54) close to the piston 2 (53) is smaller than the cross-sectional area of ​​the end close to the piston 1 (52).

6. The device for detecting broken edges of special-shaped knives according to claim 4, characterized in that: The surface of the workbench (1) is provided with a driving mechanism for driving the contact mechanism (4) to move, the driving mechanism comprising a mounting frame (6), a longitudinal driving assembly (7), an oblique driving assembly (8) and a flipping assembly (9), the mounting frame (6) slides along the surface of the workbench (1), the longitudinal driving assembly (7) comprises a driving member 1 (71), a moving seat (72) and a rotating seat (73), the rotating seat (73) is rotatably connected to the moving seat (72) via a rotating shaft, the rotating shaft passes through the moving seat (72), one end of the rotating shaft away from the rotating seat (73) is connected to the driving end of the flipping assembly (9), the driving member 1 (71) drives the moving seat (72) to slide along the surface of the mounting frame (6), and at the same time, the flipping assembly (9) drives the rotating seat (73) to rotate, the oblique driving assembly (8) is connected to the rotating seat (73) and is used to drive the detection roller (44) to move along the peak line of the blade; The oblique driving assembly (8) comprises a second driving member (81) and a base (82), wherein the second driving member (81) is connected to the rotating base (73), the base (82) is connected to the driving end of the second driving member (81), and the mounting block (41) is connected to the surface of the base (82); The flip assembly (9) comprises a gear (91) and a rack (92); the rack (92) is connected to the surface of the mounting frame (6); the gear (91) is fixedly connected to an end of the rotating shaft away from the rotating seat (73); the gear (91) is meshed with the rack (92).

7. The device for detecting broken edges of special-shaped knives according to claim 6, characterized in that: The contact mechanisms (4) are provided in multiple groups, and the multiple groups of contact mechanisms (4) are arranged in one-to-one correspondence with the multiple groups of adjacent blades of the tool (3).

8. A method for using a device for detecting broken edges of special-shaped knives, characterized in that: The broken edge detection device for a special-shaped knife according to any one of claims 6 to 7 is used to detect the broken edge, which comprises the following steps: S1, installing the tool on the CNC frame, and the CNC frame controls the tool to move to the detection end of the detection device; S2, move the mounting frame to move the detection roller of the contact mechanism to the peak line of the tool blade until the abutment portion of the sliding member is attached to the surface of the mounting block. At this time, the conductive block 2 contacts the two sets of conductive blocks 1 to light up the warning light; S3, start the second driving member to drive the detection roller to move along the peak line of the upper blade. During the movement, if there is a notch on the blade, the elastic telescopic member drives the second conductive block away from the two groups of first conductive blocks. At this time, the prompt light goes out. If there is no notch on the blade, the prompt light stays on until the detection roller is away from the blade. S4, the CNC frame controls the tool to rotate so that the detection roller detects all the upper blades of the tool; S5. After inspecting the upper blade of the tool, restore the second driving member and the mounting frame; S6, start the driving member 1 to drive the moving seat to move upward, and at the same time, the rack cooperates with the gear to drive the rotating seat to rotate, so that the contact mechanism is turned over as a whole, and then repeat steps S2 to S5 to complete the detection of the lower side blade of the tool.

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