A machining device with automatic detection

By combining a guiding device and a detection component, and utilizing light detection and cylinder push rod drive, the problems of sheet material conveying deviation and fixed-length cutting are solved, achieving high-precision sheet material cutting and wide applicability.

CN224526672UActive Publication Date: 2026-07-21HANDAN ERNINGHE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HANDAN ERNINGHE TECH CO LTD
Filing Date
2025-08-19
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing cutting devices lack the function of detecting the conveying direction of the sheet material, which leads to the offset of the sheet material, making it difficult to achieve fixed-length cutting and resulting in low processing accuracy. In addition, the device structure is fixed, limiting its application range.

Method used

The system employs a combination of guiding devices, detection components, and cutting devices. It utilizes a light emitter and receiver to detect the position of the sheet material and perform fixed-length cutting. The conveying direction of the sheet material and fixed-length cutting are achieved through the drive of cylinders and push rods.

Benefits of technology

It achieves precise control of the sheet material conveying direction, ensuring smooth cutting process and improving cutting accuracy and the applicability of the device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of automatic detection's mechanical processing device, including bottom plate, the bottom plate upper end is respectively fixedly installed with installation platform and support, the support upper end is respectively fixedly installed with guiding device, detection piece and cutting device, the installation platform upper end middle part is fixedly installed with No. 1 receiving piece, the installation platform upper end right part is fixedly installed with auxiliary part, the support right end front side is fixedly installed with fixed length piece, the support right end upper part is fixedly installed with numerical control console, the numerical control console right end is respectively fixedly installed with display screen and several adjusting button. The utility model said a kind of automatic detection's mechanical processing device, avoid the deviation of plate in conveying process while realizing the processing plate conveying direction detection function, ensure the smooth progress of subsequent processing;And fixed length detection is carried out to processing plate, improve cutting processing precision;In addition, the length of plate can be adjusted, improve the mechanical processing use range, it is beneficial to large-area popularization and use.
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Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a machining device with automatic detection. Background Technology

[0002] Machining refers to the process of changing the shape, size, or properties of a workpiece using mechanical equipment. Based on the processing method, it can be divided into cutting and pressure processing. Cutting often involves cutting shaped sheet metal, but the following problems often arise during this process: 1. Existing cutting equipment lacks the function of detecting the conveying direction of the sheet metal, making it prone to deviation during transport and affecting subsequent processing; 2. Existing equipment cannot easily cut sheet metal to a fixed length, resulting in unevenly cut pieces and low processing accuracy; 3. Existing equipment is mostly fixed in structure, making it inconvenient to adjust the length, thus limiting the scope of application and hindering widespread adoption. Utility Model Content

[0003] The main objective of this invention is to provide a machining device with automatic detection, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A machining device with automatic detection includes a base plate. A mounting platform and a support are fixedly mounted on the upper end of the base plate. A guide device, a detection component, and a cutting device are fixedly mounted on the upper end of the support, with the guide device located to the left of the detection component and the detection component to the left of the cutting device. A processing plate passes through the left end of the support. Three sets of support frames are fixedly mounted on the upper end of the mounting platform. Each of the three sets of support frames has a movably connected bearing roller in its middle, and the outer surface of the bearing roller contacts the lower end of the processing plate. A receiving component is fixedly mounted in the middle of the upper end of the mounting platform, located below the detection component. An auxiliary component is fixedly mounted on the right side of the upper end of the mounting platform, located to the lower left of the cutting device. A length-fixed component is fixedly mounted on the front right side of the support, and the length-fixed component is at the same horizontal line as the processing plate. A CNC table is fixedly mounted on the upper right side of the support. A display screen and several adjustment buttons are fixedly mounted on the right end of the CNC table, and the display screen and several adjustment buttons are electrically connected to the CNC table. The right end of the processing plate passes through the middle of the guide device, and the lower end of the guide device is slidably connected to the left side of the mounting platform.

[0006] Preferably, the guiding device includes a support platform, on the upper end of which a first cylinder is fixedly installed. A first push rod is fixedly connected to the output end of the first cylinder. A second upright is fixedly connected to the rear end of the first push rod. A connecting plate is fixedly connected to the lower side of the rear end of the second upright. A first upright is fixedly connected to the rear end of the connecting plate. A first sliding seat is slidably connected to the upper ends of the first and second uprights. Sliding blocks are fixedly connected to the front and rear lower ends of the connecting plate.

[0007] Preferably, the upper end of the first sliding seat is fixedly connected to the upper end of the bracket, the lower end of the support platform is fixedly connected to the upper end of the mounting platform, and the first cylinder is electrically connected to the CNC table.

[0008] Preferably, the detection component includes a second sliding seat, with a first light emitter and a second light emitter slidably connected to the lower end of the second sliding seat, and the first light emitter is located in front of the second light emitter. Several first fastening knobs are threadedly installed at equal intervals on the right end of the second sliding seat, and the upper end of the second sliding seat is fixedly connected to the upper end of the bracket.

[0009] Preferably, the first receiving component includes a third sliding base, in which a first light receiver and a second light receiver are slidably connected, with the first light receiver located in front of the second light receiver. Indicator lights are fixedly installed on the upper ends of both the first and second light receivers. Several second-order fastening knobs are threaded onto the right end of the third sliding base. The lower end of the third sliding base is fixedly connected to the upper end of the mounting platform. Both the first and second light receivers are electrically connected to the CNC table.

[0010] Preferably, the cutting device includes a hydraulic cylinder, a second push rod is fixedly connected to the output end of the hydraulic cylinder, a cutting blade is fixedly connected to the lower end of the second push rod, the upper end of the second push rod passes through the upper end of the bracket, the auxiliary component includes a cutting table, an auxiliary tool is fixedly installed on the right side of the cutting table, the auxiliary tool is located to the lower left of the cutting blade, and the hydraulic cylinder is electrically connected to the CNC table.

[0011] Preferably, the fixed-length component includes a second cylinder, the output end of which is fixedly connected to a third push rod, and a third light emitter is fixedly installed on the left side of the rear end of the third push rod. The second cylinder is electrically connected to the CNC table.

[0012] Preferably, the upper end of the mounting platform is provided with a chute and a receiving hopper, the chute is located to the left of the receiving hopper, and the sliding blocks are matched with and slidably connected to the chute.

[0013] Preferably, the bracket includes a frame, an opening at the left end of the frame, a second receiver fixedly installed at the rear end of the frame, the second receiver including a fourth sliding seat, a third light receiver slidably installed inside the fourth sliding seat, and an indicator light fixedly installed at the front end of the third light receiver, a number of fastening screws threaded onto the upper end of the fourth sliding seat, and the third light receiver electrically connected to the CNC table.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In this utility model, by setting up a detection component, a first receiving component and a guiding device, the first receiving component receives the detection light emitted by the detection component to detect the position of the processed board, and drives the guiding device to adjust the position of the processed board in the conveying direction. This realizes the function of detecting the conveying direction of the processed board while avoiding the board from shifting during the conveying process, thus ensuring the smooth progress of subsequent processing.

[0016] 2. In this utility model, by setting up a fixed-length component, a second receiving component, and a cutting device, the second receiving component receives the detection light emitted by the fixed-length component to perform fixed-length detection on the processed plate, and then drives the cutting device to perform fixed-length cutting on the processed plate, thereby improving the cutting accuracy.

[0017] 3. In this utility model, the positions of multiple light emitters and multiple light receivers are adjusted by the second cylinder on the fixed length component, the fourth sliding seat on the second receiving component, the second sliding seat on the detection component, and the third sliding seat on the first receiving component, respectively, so as to finally achieve the adjustment of the fixed length of the cutting plate, improve the application range of the machining, and facilitate its widespread use. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of a machining device with automatic detection according to the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a guide device for a machining apparatus with automatic detection according to the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of a test piece for a machining device with automatic detection according to the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the first receiving component of a machining device with automatic detection according to this utility model;

[0022] Figure 5 This is a schematic diagram showing the distribution structure of the cutting device and auxiliary components of a machining device with automatic detection according to this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of a fixed-length component of a machining device with automatic detection according to this utility model;

[0024] Figure 7 This is a schematic diagram showing the connection between the support and the mounting platform of a machining device with automatic detection according to this utility model.

[0025] In the diagram: 1. Base plate; 2. Bracket; 3. Guide device; 4. Inspection piece; 5. First receiving piece; 6. Cutting device; 7. Auxiliary parts; 8. Length fixing piece; 9. Mounting platform; 10. Support frame; 11. Bearing roller; 12. Processing plate; 13. CNC table; 14. Adjustment button; 15. Display screen; 21. Opening; 22. Second receiving piece; 23. Frame; 31. Support platform; 32. First cylinder; 33. First push rod; 34. Connecting plate; 35. Sliding block; 36. First upright; 37. Second upright; 38. First sliding seat; 41. Second... 42. Sliding seat; 43. No. 1 fastening knob; 44. No. 1 light emitter; 55. No. 2 light emitter; 56. No. 2 fastening knob; 57. No. 1 light receiver; 58. No. 2 light receiver; 59. Indicator light; 50. No. 3 sliding seat; 61. Hydraulic cylinder; 62. No. 2 push rod; 63. Cutting blade; 71. Cutting table; 72. Auxiliary tool; 81. No. 2 cylinder; 82. No. 3 push rod; 83. No. 3 light emitter; 91. Slide groove; 92. Receiving hopper; 221. No. 3 light receiver; 222. Fastening screw; 223. No. 4 sliding seat. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] like Figure 1-7 As shown, a machining device with automatic detection includes a base plate 1. A mounting platform 9 and a support 2 are fixedly mounted on the upper end of the base plate 1. A guide device 3, a detection piece 4, and a cutting device 6 are fixedly mounted on the upper end of the support 2, with the guide device 3 located to the left of the detection piece 4 and the detection piece 4 located to the left of the cutting device 6. A processing plate 12 passes through the left end of the support 2. Three sets of support frames 10 are fixedly mounted on the upper end of the mounting platform 9. Each of the three sets of support frames 10 has a movably connected bearing roller 11 in its middle, and the outer surface of the bearing roller 11 contacts the lower end of the processing plate 12. A receiving piece 5 is fixedly mounted in the middle of the upper end of the mounting platform 9. Furthermore, the receiving component 5 is located below the testing component 4. An auxiliary component 7 is fixedly installed on the upper right side of the mounting platform 9, and the auxiliary component 7 is located on the lower left side of the cutting device 6. A length-fixed component 8 is fixedly installed on the front right side of the bracket 2, and the length-fixed component 8 is on the same horizontal line as the processing plate 12. A CNC table 13 is fixedly installed on the upper right side of the bracket 2. A display screen 15 and several adjustment buttons 14 are fixedly installed on the right side of the CNC table 13, and the display screen 15 and several adjustment buttons 14 are electrically connected to the CNC table 13. The right end of the processing plate 12 passes through the middle of the guide device 3, and the lower end of the guide device 3 is slidably connected to the left side of the mounting platform 9.

[0030] To control the conveying direction of the processed sheet metal 12, the guide device 3 includes a support platform 31. A first cylinder 32 is fixedly installed on the upper end of the support platform 31. A first push rod 33 is fixedly connected to the output end of the first cylinder 32. A second upright rod 37 is fixedly connected to the rear end of the first push rod 33. A connecting plate 34 is fixedly connected to the lower side of the rear end of the second upright rod 37. A first upright rod 36 is fixedly connected to the rear end of the connecting plate 34. A first sliding seat 38 is slidably connected to the upper ends of the first upright rod 36 and the second upright rod 37. Sliding blocks 35 are fixedly connected to the front and rear lower ends of the connecting plate 34. The first cylinder 32 drives and moves the second upright rod 37 on the first push rod 33 forward and backward. The processing plate 12 moves back and forth to prevent it from shifting during transport. To install and connect the guide device 3, the upper end of the first sliding seat 38 is fixedly connected to the upper end of the bracket 2, the lower end of the support platform 31 is fixedly connected to the upper end of the mounting platform 9, and the first cylinder 32 is electrically connected to the CNC table 13. To detect the transport direction of the processing plate 12, the detection component 4 includes a second sliding seat 41. The lower end of the second sliding seat 41 is slidably connected to a first light emitter 43 and a second light emitter 44, with the first light emitter 43 located in front of the second light emitter 44. Several equally spaced first clamps are threaded onto the right end of the second sliding seat 41. The upper end of the second sliding seat 41 is fixedly connected to the upper end of the bracket 2. The first receiving component 5 includes a third sliding seat 55, in which a first light receiver 52 and a second light receiver 53 are slidably connected, with the first light receiver 52 located in front of the second light receiver 53. Indicator lights 54 are fixedly installed on the upper ends of both the first light receiver 52 and the second light receiver 53. Several second-order fastening knobs 51 are threaded onto the right end of the third sliding seat 55. The lower end of the third sliding seat 55 is fixedly connected to the upper end of the mounting platform 9. Both the first light receiver 52 and the second light receiver 53 are electrically connected to the CNC console 13. 2 and the second light receiver 53 are used to receive the detection light emitted by the first light emitter 43 and the second light emitter 44; in order to perform the cutting operation on the processed plate 12, the cutting device 6 includes a hydraulic cylinder 61, the output end of the hydraulic cylinder 61 is fixedly connected to the second push rod 62, the lower end of the second push rod 62 is fixedly connected to the cutting blade 63, the upper end of the second push rod 62 passes through the upper end of the bracket 2, the auxiliary component 7 includes a cutting table 71, the right side of the cutting table 71 is fixedly installed with an auxiliary tool 72, the auxiliary tool 72 is located to the lower left of the cutting blade 63, the hydraulic cylinder 61 is electrically connected to the CNC table 13, and the coordinated movement between the auxiliary tool 72 and the cutting blade 63 realizes the cutting operation on the processed plate 12;To achieve the cutting operation of the processing sheet 12 of the same length, the fixed-length component 8 includes a second cylinder 81. The output end of the second cylinder 81 is fixedly connected to a third push rod 82. A third light emitter 83 is fixedly installed on the left side of the rear end of the third push rod 82. The second cylinder 81 is electrically connected to the CNC table 13, which is equipped with a microcontroller, specifically an STM8L microcontroller. The mounting platform 9 has a slide groove 91 and a receiving hopper 92 on its upper end. The slide groove 91 is located to the left of the receiving hopper 92, and the sliding blocks 35 are matched and slidably connected to the slide groove 91. The receiving hopper 92 can collect the cut processing sheet 12. The slide 91 facilitates the forward and backward movement of the guide device 3. To receive the light emitted by the third light emitter 83, the bracket 2 includes a frame 23 with an opening 21 at its left end. A second receiver 22 is fixedly installed at the rear end of the frame 23. The second receiver 22 includes a fourth sliding seat 223, inside which a third light receiver 221 is slidably installed. An indicator light is fixedly installed at the front end of the third light receiver 221. Several fastening screws 222 are threaded onto the upper end of the fourth sliding seat 223. The third light receiver 221 is electrically connected to the CNC console 13.

[0031] It should be noted that this utility model is a machining device with automatic detection. When it is necessary to cut the processing plate 12, one end of the processing plate 12 is first inserted through the opening 21 on the bracket 2. Then, under the action of the external pushing device, the processing plate 12 is driven to feed. At this time, the processing plate 12 is gradually conveyed to the right. During the conveying process, when the third light receiver 221 in the fourth sliding seat 223 cannot receive the light emitted by the third light emitter 83, the indicator light on the third light receiver 221 lights up, and the third light receiver 221 is electrically connected to the CNC table 13. The CNC table 13 controls the hydraulic cylinder 61 to start working. At this time, the hydraulic cylinder 61... The second push rod 62 is lowered, and the lowered push rod 62 drives the cutting blade 63 to lower and cut the processing plate 12. During the cutting process, the cutting blade 63 cooperates with the auxiliary blade 72 on the cutting table 71 to cut, thereby realizing the fixed-length cutting operation of the processing plate 12. When it is necessary to cut plates of different lengths, the second cylinder 81 can be controlled by adjusting the button 14. The second cylinder 81 drives the third light emitter 83 on the third push rod 82 to move left and right. At the same time, the position of the third light receiver 221 in the fourth sliding seat 223 can be adjusted, and the third light receiver 221 is fixed by the fastening screw 222. 221 is located directly behind the third light emitter 83, enabling adjustment of the horizontal distance between the third light receiver 221 and the cutting device 6, thereby facilitating the cutting of plates of different lengths and improving its applicability. Under normal conveying conditions of the processed plate 12, both the first light receiver 52 and the second light receiver 53 can receive the detection light emitted by the first light emitter 43 and the second light emitter 44. When the first light receiver 52 does not receive the light emitted by the first light emitter 43, but the second light receiver 53 receives the light emitted by the second light emitter 44, the CNC console 13 receives the signal that the first light receiver 52 has not received the light and controls the first cylinder 3. 2. Drive the stretching: Cylinder 32 drives the second upright rod 37 on the first push rod 33 to move backward, causing the processing plate 12 to move backward. When the first light receiver 52 receives the light emitted by the first light emitter 43 and the second light receiver 53 does not receive the light emitted by the second light emitter 44, the CNC table 13 receives the signal that the second light receiver 53 has not received the light and controls the first cylinder 32 to drive the retraction. Cylinder 32 drives the second upright rod 37 on the first push rod 33 to move forward, causing the processing plate 12 to move forward, thereby preventing the processing plate 12 from deviating during the conveying process, realizing the detection of the conveying direction, and ensuring the smooth progress of subsequent cutting operations.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A machining apparatus with automatic detection, comprising a base plate (1), characterized in that: The base plate (1) is fixedly mounted with an installation platform (9) and a bracket (2) respectively. The bracket (2) is fixedly mounted with a guide device (3), a detection piece (4) and a cutting device (6) respectively. The guide device (3) is located to the left of the detection piece (4), and the detection piece (4) is located to the left of the cutting device (6). The left end of the bracket (2) has a processing plate (12) passing through it. The installation platform (9) is fixedly mounted with three sets of support frames (10). Each of the three sets of support frames (10) is movably connected to a bearing roller (11) in the middle. The outer surface of the bearing roller (11) is in contact with the lower end of the processing plate (12). The installation platform (9) is fixedly mounted with a receiving piece (5) in the middle of its upper end. The receiving piece (5) is located at... Below the test piece (4), an auxiliary part (7) is fixedly installed on the upper right side of the mounting platform (9), and the auxiliary part (7) is located on the lower left of the cutting device (6). A length-fixed part (8) is fixedly installed on the front right side of the bracket (2), and the length-fixed part (8) and the processing plate (12) are on the same horizontal line. A CNC table (13) is fixedly installed on the upper right side of the bracket (2). A display screen (15) and several adjustment buttons (14) are fixedly installed on the right side of the CNC table (13), and the display screen (15) and several adjustment buttons (14) are electrically connected to the CNC table (13). The right end of the processing plate (12) passes through the middle of the guide device (3), and the lower end of the guide device (3) is slidably connected to the left side of the mounting platform (9).

2. The machining apparatus with automatic detection according to claim 1, characterized in that: The guiding device (3) includes a support platform (31), on which a first cylinder (32) is fixedly installed. A first push rod (33) is fixedly connected to the output end of the first cylinder (32). A second upright rod (37) is fixedly connected to the rear end of the first push rod (33). A connecting plate (34) is fixedly connected to the lower side of the rear end of the second upright rod (37). A first upright rod (36) is fixedly connected to the rear end of the connecting plate (34). A first sliding seat (38) is slidably connected to the upper end of the first upright rod (36) and the upper end of the second upright rod (37). Sliding blocks (35) are fixedly connected to the front and rear parts of the lower end of the connecting plate (34).

3. The machining apparatus with automatic detection according to claim 2, characterized in that: The upper end of the first sliding seat (38) is fixedly connected to the upper end of the bracket (2), the lower end of the support platform (31) is fixedly connected to the upper end of the mounting platform (9), and the first cylinder (32) is electrically connected to the CNC table (13).

4. The machining apparatus with automatic detection according to claim 1, characterized in that: The detection component (4) includes a second sliding seat (41). The lower end of the second sliding seat (41) is slidably connected to a first light emitter (43) and a second light emitter (44), and the first light emitter (43) is located in front of the second light emitter (44). The right end of the second sliding seat (41) is threaded with several first fastening knobs (42) distributed at equal intervals. The upper end of the second sliding seat (41) is fixedly connected to the upper end of the bracket (2).

5. A machining apparatus with automatic detection according to claim 1, characterized in that: The first receiving component (5) includes a third sliding base (55), inside which a first light receiver (52) and a second light receiver (53) are slidably connected, and the first light receiver (52) is located in front of the second light receiver (53). Indicator lights (54) are fixedly installed on the upper ends of the first light receiver (52) and the second light receiver (53). Several second fastening knobs (51) are threaded on the right end of the third sliding base (55). The lower end of the third sliding base (55) is fixedly connected to the upper end of the mounting platform (9). The first light receiver (52) and the second light receiver (53) are both electrically connected to the CNC table (13).

6. A machining apparatus with automatic detection according to claim 1, characterized in that: The cutting device (6) includes a hydraulic cylinder (61), the output end of which is fixedly connected to a second push rod (62), the lower end of which is fixedly connected to a cutting blade (63), the upper end of which passes through the upper end of the bracket (2), the auxiliary component (7) includes a cutting table (71), the right side of which is fixedly installed with an auxiliary tool (72), the auxiliary tool (72) being located to the lower left of the cutting blade (63), and the hydraulic cylinder (61) being electrically connected to the CNC table (13).

7. A machining apparatus with automatic detection according to claim 1, characterized in that: The fixed-length component (8) includes a second cylinder (81), the output end of which is fixedly connected to a third push rod (82), and a third light emitter (83) is fixedly installed on the left side of the rear end of the third push rod (82). The second cylinder (81) is electrically connected to the CNC table (13).

8. A machining apparatus with automatic detection according to claim 1, characterized in that: The upper end of the mounting platform (9) is provided with a sliding groove (91) and a receiving hopper (92). The sliding groove (91) is located to the left of the receiving hopper (92), and the sliding blocks (35) are matched with the sliding groove (91) and slidably connected.

9. A machining apparatus with automatic detection according to claim 1, characterized in that: The bracket (2) includes a frame (23), with an opening (21) at the left end of the frame (23). A second receiver (22) is fixedly installed at the rear end of the frame (23). The second receiver (22) includes a fourth sliding seat (223). A third light receiver (221) is slidably installed inside the fourth sliding seat (223). An indicator light is fixedly installed at the front end of the third light receiver (221). Several fastening screws (222) are threaded onto the upper end of the fourth sliding seat (223). The third light receiver (221) is electrically connected to the CNC table (13).