Strength detection device for PCB cutter

Abstract

The application relates to the technical field of PCB cutter detection, in particular to a strength detection equipment for a PCB cutter, which comprises a workbench, a supporting table is fixedly connected to the upper end of the workbench, a clamping assembly is arranged on the supporting table, a vertical stand is arranged on the upper end of the workbench, a threaded rod is rotationally arranged in the vertical stand, a threaded plate is threadedly connected to the outer wall of the threaded rod, the threaded plate is slidably arranged in the vertical stand, and a connecting frame is fixedly connected to one end of the threaded plate. The strength detection equipment for the PCB cutter can recycle the impact kinetic energy released in the breaking moment, convert the impact kinetic energy into double cleaning power of negative pressure dust collection and magnetic dust removal, does not need any external power source, has a compact structure and small space occupation, can simultaneously capture non-magnetic residual dust and ferromagnetic dust through the gas-magnetic cooperation, has more comprehensive cleaning effect, highly integrates various functional components, can complete internal self-cleaning through reciprocating movement of the extrusion block, and is simple to maintain and operate.

Description

Technical Field

[0001] This invention relates to the field of PCB tool testing technology, specifically to a strength testing device for PCB tools. Background Technology

[0002] PCB cutting tools have small diameters and large length-to-diameter ratios. They are subjected to large bending loads when drilling and milling, and tool breakage is their main failure mode. Therefore, each tool must be tested for bending strength before leaving the factory. Existing equipment clamps the tool holder and arranges it in a cantilever. A loading head slowly applies a load to the cantilever end and records the peak load at the moment of fracture as a strength indicator. After testing, the next tool is installed, and automatic feeding is achieved by a vibrating hopper, slide, and push rod to form continuous batch testing.

[0003] The existing technology has obvious shortcomings. When the tool breaks, the residual dust is scattered on the table, which affects the subsequent clamping accuracy and repeatability of the test. Cleaning requires additional motors, cylinders or air blowing devices, which are complex in structure and have high energy consumption. In addition, the return section after the loading head is tested is completely idle, resulting in wasted cycle time. Feeding, cleaning and testing are independent of each other, which limits efficiency. Furthermore, it cannot be automatically cleaned in time when it breaks, and the subsequent spread of debris increases the cost and cleaning time. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a strength testing device for PCB cutting tools.

[0005] This invention adopts the following technical solution: a strength testing device for PCB cutting tools, including a worktable, a support platform fixedly connected to the upper end of the worktable, a clamping assembly provided on the support platform, a stand provided at the upper end of the worktable, a threaded rod rotatably disposed within the stand, a threaded plate threadedly connected to the outer wall of the threaded rod, the threaded plate slidingly disposed within the stand, a connecting frame fixedly connected to one end of the threaded plate, and further comprising:

[0006] A power recovery mechanism for recovering kinetic energy upon fracture, the power recovery mechanism including a connecting frame;

[0007] And an auxiliary mechanism, which can enhance the chip removal effect at the fracture point, is set inside the power recovery mechanism.

[0008] As a further description of the above technical solution: an extrusion block is provided on the lower side of the connecting frame, a guide rod is fixedly connected to the bottom end of the connecting frame, the guide rod is movably inserted into the extrusion block, a rotating shaft is rotatably provided inside the connecting frame, a torsion spring is fixedly connected between the outer wall of the rotating shaft and the connecting frame, an extension rod is fixedly connected to the bottom end of the extrusion block, a venting groove is provided on both the bottom end and the outer wall of the extension rod, the venting groove is connected to the inner cavity of the upper end of the extension rod, an extrusion rod is fixedly connected to the bottom end of the rotating shaft, a first inclined ring is fixedly connected inside the extrusion block, and the bottom end of the extrusion rod abuts against the first inclined ring.

[0009] As a further description of the above technical solution: the auxiliary mechanism includes a trigger block, which is fixedly connected to the connecting frame. A central shaft is fixedly connected inside the rotating shaft. A rotating block is movably sleeved on the outside of the central shaft. One end of the rotating block extends to the outside of the rotating shaft. A connecting block is fixedly connected to the end of the rotating block away from the rotating shaft. A magnetic strip is fixedly connected to the end of the connecting block away from the rotating shaft. An abutting rod is fixedly connected to the end of the rotating block located inside the rotating shaft. The bottom end of the abutting rod abuts against a second inclined ring, which is fixedly connected inside the rotating shaft.

[0010] As a further description of the above technical solution: the installation position of the support frame on the workbench can be changed.

[0011] As a further description of the above technical solution: the ventilation slots are arranged in a ring with equal spacing.

[0012] As a further description of the above technical solution: before the extrusion tool is extruded at the bottom of the extrusion block, there is a gap between the bottom of the rotating shaft and the extrusion block.

[0013] As a further description of the above technical solution: the magnetic strip is magnetic, and several magnetic strips are arranged in a ring at equal intervals.

[0014] As a further description of the above technical solution: both the second and first inclined rings have inclined sliding surfaces at their upper ends, and the top of the rotating block can generate magnetic attraction with the rotating shaft, so that the rotating block is located in the middle of the rotating cavity.

[0015] This invention provides an improved strength testing device for PCB cutting tools, which has the following improvements and advantages compared with the prior art:

[0016] Firstly, the energy stored in the torsion spring is released at the moment of blade breakage, driving the extrusion block to move rapidly downward along the guide rod, causing its internal volume to increase sharply. The negative pressure is formed through the ventilation groove on the extension rod, actively sucking in the debris at the breakage point. During the loading process, the threaded rod drives the threaded plate to press down, and the connecting frame moves accordingly. The extrusion rod and the inclined surface of the inclined ring one force the rotating shaft to rotate and compress the torsion spring to store energy. When the blade breaks, the torsion spring is released, the rotating shaft reverses, and the extrusion rod pushes the extrusion block downward again, directly converting the impact kinetic energy into clean airflow.

[0017] Secondly, the rotating shaft is equipped with a radially extendable magnetic strip, which is fixed to the rotating block through a connecting block. The rotating block is sleeved on the central shaft. When the torsion spring is released and the rotating shaft rotates, the rotating block is pushed out by the trigger block, exposing the magnetic strip. It attracts magnetic dust. During recycling, the contact rod and the inclined ring cooperate to deflect the magnetic strip, preventing the adsorbed debris from being scraped off the inner wall of the rotating shaft. In conjunction with the negative pressure suction, it forms a dual air and magnetic dust removal mechanism, which enhances the ability to capture fine particles and improves the thoroughness of cleaning.

[0018] Thirdly, the energy storage loading, fracture detection, negative pressure dust collection and magnetic chip removal are integrated into the same mechanism consisting of the connecting frame, extrusion block, rotating shaft and auxiliary mechanism. No independent drive source is required, the space is compact, and after the test, the extrusion block only needs to be moved back and forth to use the airflow in its internal cavity to clean the residual debris inside and on the magnetic strip. Maintenance is convenient. The whole system realizes loading, cleaning and chip removal in one, effectively reducing auxiliary time, avoiding the impact of debris on the subsequent clamping accuracy, improving the repeatability of the test and the long-term stability of the equipment.

[0019] In summary, this invention recovers the impact kinetic energy released at the moment of fracture and converts it into dual cleaning power of negative pressure suction and magnetic dust removal. It requires no external power source, has a simple structure, occupies little space, and the combined effect of air and magnetism can simultaneously capture non-magnetic debris and ferromagnetic dust, resulting in a more comprehensive cleaning effect. The functional components are highly integrated, and the internal self-cleaning can be completed by the reciprocating motion of the extrusion block. Maintenance and operation are simple. Overall, this solution effectively shortens auxiliary time, reduces manual intervention, lowers equipment manufacturing costs and operating energy consumption, and helps improve the stability and economy of batch testing. Attached Figure Description

[0020] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 A perspective sectional view of the connecting frame provided in an embodiment of the present invention;

[0023] Figure 3 A perspective sectional view of the rotating shaft provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the trigger block provided in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the transfer block provided in an embodiment of the present invention;

[0026] Figure 6 for Figure 2 Enlarged view of point A in the middle;

[0027] Figure 7 for Figure 3 Enlarged view of point B in the middle;

[0028] Figure 8 for Figure 5 Enlarged view of point C in the middle.

[0029] In the diagram: 1. Workbench; 2. Support platform; 3. Stand; 4. Threaded rod; 5. Clamping assembly; 6. Power recovery mechanism; 61. Connecting frame; 62. Extrusion block; 63. Guide rod; 64. Torsion spring; 65. Extension rod; 66. Ventilation slot; 67. Rotating shaft; 68. Extrusion rod; 69. Inclined ring one; 7. Threaded plate; 8. Auxiliary mechanism; 81. Trigger block; 82. Magnetic strip; 83. Rotating block; 84. Connecting block; 85. Central shaft; 86. Abutment rod; 87. Inclined ring two. Detailed Implementation

[0030] To make the technical means, creative features, objectives, and effects of this invention readily understandable, the invention is further described below with reference to specific illustrations. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] Please see Figure 1 - Figure 8 This invention provides a technical solution: a strength testing device for PCB cutting tools, including a worktable 1, a support platform 2 fixedly connected to the upper end of the worktable 1, a clamping assembly 5 provided on the support platform 2, a stand 3 provided at the upper end of the worktable 1, a threaded rod 4 rotatably disposed inside the stand 3, a threaded plate 7 threadedly connected to the outer wall of the threaded rod 4, the threaded plate 7 slidingly disposed within the stand 3, and a connecting frame 61 fixedly connected to one end of the threaded plate 7, and further including:

[0032] The energy recovery mechanism 6 is used to recover kinetic energy upon breakage, and the energy recovery mechanism 6 includes a connecting frame 61;

[0033] And auxiliary mechanism 8, which can enhance the chip removal effect at the fracture point, is installed inside the power recovery mechanism 6.

[0034] The installation position of the support frame 3 on the workbench 1 can be changed.

[0035] Specifically, the energy stored in the torsion spring 64 is released at the moment of the tool breakage, driving the extrusion block 62 to move rapidly downward along the guide rod 63, causing its internal volume to increase sharply. The negative pressure is formed by the ventilation groove 66 on the extension rod 65, which actively sucks in the debris at the breakage point. During the loading process, the threaded rod 4 drives the threaded plate 7 to press down, and the connecting frame 61 moves accordingly. The extrusion rod 68 and the inclined surface of the inclined ring 69 force the rotating shaft 67 to rotate and compress the torsion spring 64 to store energy. When the tool breaks, the torsion spring 64 is released, the rotating shaft 67 reverses, and the extrusion rod 68 pushes the extrusion block 62 downward again, directly converting the impact kinetic energy into clean airflow.

[0036] The rotating shaft 67 is equipped with a radially extendable magnetic strip 82, which is fixed to the rotating block 83 via a connecting block 84. The rotating block 83 is sleeved on the central shaft 85. When the torsion spring 64 is released and the rotating shaft 67 rotates, the rotating block 83 is pushed out by the trigger block 81, exposing the magnetic strip 82. It attracts ferromagnetic dust. During recycling, the contact rod 86 and the inclined ring 87 cooperate to deflect the magnetic strip 82, preventing the adsorbed debris from being scraped off the inner wall of the rotating shaft 67. In conjunction with the negative pressure suction, a dual air-magnetic dust removal mechanism is formed, which enhances the ability to capture fine particles and improves the thoroughness of cleaning.

[0037] Energy storage loading, fracture detection, negative pressure dust collection, and magnetic chip removal are integrated into a single mechanism consisting of a connecting frame 61, an extrusion block 62, a rotating shaft 67, and an auxiliary mechanism 8. No independent drive source is required, and the space is compact. After the test, simply moving the extrusion block 62 back and forth will allow the airflow in its internal cavity to clean the residual debris inside and on the magnetic strip 82. Maintenance is convenient. The entire system integrates loading, cleaning, and chip removal, effectively reducing auxiliary time, preventing debris from affecting subsequent clamping accuracy, and improving test repeatability and long-term equipment stability.

[0038] In another embodiment of the present invention, a pressing block 62 is provided on the lower side of the connecting frame 61, a guide rod 63 is fixedly connected to the bottom end of the connecting frame 61, the guide rod 63 is movably inserted into the pressing block 62, a rotating shaft 67 is rotatably arranged inside the connecting frame 61, a torsion spring 64 is fixedly connected between the outer wall of the rotating shaft 67 and the connecting frame 61, an extension rod 65 is fixedly connected to the bottom end of the pressing block 62, a venting groove 66 is provided on the bottom end and the outer wall of the extension rod 65, the venting groove 66 is connected to the inner cavity of the upper end of the extension rod 65, a squeezing rod 68 is fixedly connected to the bottom end of the rotating shaft 67, a slanted ring 69 is fixedly connected inside the pressing block 62, and the bottom end of the squeezing rod 68 abuts against the slanted ring 69.

[0039] The ventilation slots 66 are arranged in a ring with equal spacing.

[0040] Before the extrusion tool is extruded at the bottom of the extrusion block 62, there is a gap between the bottom of the rotating shaft 67 and the extrusion block 62.

[0041] Specifically, the energy stored in the torsion spring 64 is released at the moment of the tool breakage, driving the extrusion block 62 to move rapidly downward along the guide rod 63, causing its internal volume to increase sharply. The negative pressure is formed by the ventilation groove 66 on the extension rod 65, which actively sucks in the debris at the breakage point. During the loading process, the threaded rod 4 drives the threaded plate 7 to press down, and the connecting frame 61 moves accordingly. The extrusion rod 68 and the inclined surface of the inclined ring 69 force the rotating shaft 67 to rotate and compress the torsion spring 64 to store energy. When the tool breaks, the torsion spring 64 is released, the rotating shaft 67 reverses, and the extrusion rod 68 pushes the extrusion block 62 downward again, directly converting the impact kinetic energy into clean airflow.

[0042] In another embodiment of the present invention, the auxiliary mechanism 8 includes a trigger block 81, which is fixedly connected to the connecting frame 61. A central shaft 85 is fixedly connected to the rotating shaft 67. A rotating block 83 is movably sleeved on the outside of the central shaft 85. One end of the rotating block 83 extends to the outside of the rotating shaft 67. A connecting block 84 is fixedly connected to the end of the rotating block 83 away from the rotating shaft 67. A magnetic strip 82 is fixedly connected to the end of the connecting block 84 away from the rotating shaft 67. An abutting rod 86 is fixedly connected to the end of the rotating block 83 located inside the rotating shaft 67. The bottom end of the abutting rod 86 abuts against a second inclined ring 87, which is fixedly connected inside the rotating shaft 67.

[0043] The magnetic strip 82 is magnetic, and there are several magnetic strips 82 arranged in a ring at equal intervals.

[0044] Both the second inclined ring 87 and the first inclined ring 69 have inclined sliding surfaces at their upper ends. The top of the rotating block 83 and the rotating shaft 67 can generate magnetic attraction, so that the rotating block 83 is located in the middle of the rotating cavity.

[0045] Specifically, the rotating shaft 67 is equipped with a radially extendable magnetic strip 82, which is fixed to the rotating block 83 via a connecting block 84. The rotating block 83 is sleeved on the central shaft 85. When the torsion spring 64 is released and the rotating shaft 67 rotates, the rotating block 83 is pushed out by the trigger block 81, exposing the magnetic strip 82. It attracts ferromagnetic dust. During recycling, the contact rod 86 and the inclined ring 87 cooperate to deflect the magnetic strip 82, preventing the adsorbed debris from being scraped off the inner wall of the rotating shaft 67. In conjunction with the negative pressure suction, a dual air-magnetic dust removal mechanism is formed, which enhances the ability to capture fine particles and improves the thoroughness of cleaning.

[0046] Energy storage loading, fracture detection, negative pressure dust collection, and magnetic chip removal are integrated into a single mechanism consisting of a connecting frame 61, an extrusion block 62, a rotating shaft 67, and an auxiliary mechanism 8. No independent drive source is required, and the space is compact. After the test, simply moving the extrusion block 62 back and forth will allow the airflow in its internal cavity to clean the residual debris inside and on the magnetic strip 82. Maintenance is convenient. The entire system integrates loading, cleaning, and chip removal, effectively reducing auxiliary time, preventing debris from affecting subsequent clamping accuracy, and improving test repeatability and long-term equipment stability.

[0047] Working principle: When using this device, the tool to be tested is first clamped in the clamping assembly 5. Then, by starting the power source, the threaded rod 4 is rotated, causing the threaded plate 7 to move downward. The threaded plate 7 drives the connecting frame 61 to move downward together. When the connecting frame 61 moves downward, the bottom end of the extrusion block 62 gradually presses against the tool, causing the extrusion block 62 to be pressed upward. When the extrusion block 62 moves upward, the bottom end of the extrusion rod 68 presses against the inclined ring 69, causing the rotating shaft 67 to rotate. Then, the extrusion block 62 continues to press downward until the tool breaks. At the moment the tool is crushed, the torsion spring 64 is compressed, causing the rotating shaft 67 to rotate and reset quickly. When the rotating shaft 67 rotates and resets, due to the cooperation of the extrusion rod 68 and the inclined ring 69, the extrusion block 62 moves downward quickly, making the cavity inside the extrusion block 62 larger. This allows external air to be quickly drawn into the extrusion block 62, thus making full use of the accumulated kinetic energy for timely cleaning when it breaks, preventing the debris from spreading further, and thus reducing the cleaning time and range of the debris.

[0048] When a fracture occurs, the applied force is recorded by a sensor installed inside the threaded plate 7 to complete the detection.

[0049] Furthermore, when the previously accumulated kinetic energy is released, the rotating shaft 67 rotates, causing the rotating block 83 to rotate. The rotating block 83 then causes the connecting block 84 and the magnetic strip 82 to rotate. When the magnetic strip 82, which extends beyond the rotating shaft 67, rotates to the break point, the magnetism of the magnetic strip 82 will attract debris from the break point and the surrounding air, resulting in a better cleaning effect and saving the cost of subsequent manual cleaning.

[0050] When the magnetic strip 82 moves outside the rotating shaft 67, the bottom end of the rotating block 83 is pressed upward by the trigger block 81, causing the rotating block 83 to move upward. When the top of the rotating block 83 is close to the rotating shaft 67, due to the magnetic attraction, the rotating block 83 is located in the middle. At this time, the magnetic strip 82 extends outward the longest, which is convenient for adsorbing debris over a wider area. When the magnetic strip 82 rotates into the rotating shaft 67, the bottom end of the rotating block 83 moves away from the trigger block 81. Due to its own weight, the rotating block 83 falls. Then, due to the pressure of the inclined ring 87 on the contact rod 86, the contact rod 86 rotates, and the other end of the rotating block 83 also rotates, causing the magnetic strip 82 to automatically tilt. This prevents the magnetic strip 82 from rubbing against the inner wall of the rotating shaft 67 when it is retracted into the rotating shaft 67, which would cause debris to fall off. It also saves space for placing the magnetic strip 82.

[0051] When cleaning the debris inside the extrusion block 62, simply move the extrusion block 62 up and down repeatedly. When cleaning the debris on the magnetic strip 82, also move the extrusion block 62 up and down, and place the magnet on the upper end of the rotating shaft 67 so that the upper end of the rotating block 83 can be attracted upwards. This allows the magnetic strip 82 to collide with the rotating shaft 67 when it rotates, thereby further improving the chip removal effect.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A strength testing device for PCB cutting tools, comprising a workbench (1), a support platform (2) fixedly connected to the upper end of the workbench (1), a clamping assembly (5) provided on the support platform (2), a stand (3) provided at the upper end of the workbench (1), a threaded rod (4) rotatably disposed inside the stand (3), a threaded plate (7) threadedly connected to the outer wall of the threaded rod (4), the threaded plate (7) slidingly disposed inside the stand (3), and a connecting frame (61) fixedly connected to one end of the threaded plate (7), characterized in that, Also includes: A power recovery mechanism (6) is used to recover kinetic energy upon breakage, the power recovery mechanism (6) including a connecting frame (61). And an auxiliary mechanism (8) that can enhance the chip removal effect at the fracture point, the auxiliary mechanism (8) being disposed within the power recovery mechanism (6).

2. The strength testing device for PCB cutting tools according to claim 1, characterized in that: The connecting frame (61) is provided with an extrusion block (62) on its lower side. A guide rod (63) is fixedly connected to the bottom end of the connecting frame (61). The guide rod (63) is movably inserted into the extrusion block (62). A rotating shaft (67) is rotatably provided inside the connecting frame (61). A torsion spring (64) is fixedly connected between the outer wall of the rotating shaft (67) and the connecting frame (61). An extension rod (65) is fixedly connected to the bottom end of the extrusion block (62). A ventilation groove (66) is provided at the bottom end and on the outer wall of the extension rod (65). The ventilation groove (66) is connected to the inner cavity at the upper end of the extension rod (65). An extrusion rod (68) is fixedly connected to the bottom end of the rotating shaft (67). A first inclined ring (69) is fixedly connected inside the extrusion block (62). The bottom end of the extrusion rod (68) abuts against the first inclined ring (69).

3. The strength testing device for PCB cutting tools according to claim 2, characterized in that: The auxiliary mechanism (8) includes a trigger block (81), which is fixedly connected to the connecting frame (61). A central shaft (85) is fixedly connected inside the rotating shaft (67). A rotating block (83) is movably sleeved on the outside of the central shaft (85). One end of the rotating block (83) extends to the outside of the rotating shaft (67). A connecting block (84) is fixedly connected to the end of the rotating block (83) away from the rotating shaft (67). A magnetic strip (82) is fixedly connected to the end of the connecting block (84) away from the rotating shaft (67). An abutting rod (86) is fixedly connected to the end of the rotating block (83) inside the rotating shaft (67). The bottom end of the abutting rod (86) abuts against a second inclined ring (87). The second inclined ring (87) is fixedly connected inside the rotating shaft (67).

4. The strength testing device for PCB cutting tools according to claim 1, characterized in that: The mounting position of the stand (3) on the workbench (1) can be changed.

5. The strength testing device for PCB cutting tools according to claim 2, characterized in that: The ventilation slots (66) are arranged in a ring with equal spacing.

6. The strength testing device for PCB cutting tools according to claim 2, characterized in that: Before the extrusion tool is extruded at the bottom of the extrusion block (62), there is a gap between the bottom of the rotating shaft (67) and the extrusion block (62).

7. The strength testing device for PCB cutting tools according to claim 3, characterized in that: The magnetic strip (82) is magnetic, and there are several magnetic strips (82) arranged in a ring at equal intervals.

8. The strength testing device for PCB cutting tools according to claim 3, characterized in that: Both the second oblique ring (87) and the first oblique ring (69) have oblique sliding surfaces at their upper ends. The top of the rotating block (83) and the rotating shaft (67) can generate magnetic attraction, so that the rotating block (83) is located in the middle of the rotating cavity.

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