Anti-deviation positioning auxiliary structure for numerical control punching of aluminum plate

Abstract

This utility model relates to the field of CNC punching technology. The anti-offset positioning auxiliary structure for CNC punching of aluminum plates includes a mounting unit fixed to the CNC punching machine, a detection unit that contacts the aluminum plate, and a sensing unit that detects the movement data of the aluminum plate. The mounting unit is used to fix the mounting rod to the CNC punching machine. The detection unit contacts the aluminum plate after the CNC punching machine completes the aluminum plate positioning. The sensing unit acquires the movement data of the aluminum plate by detecting the movement of the detection unit. This structure can monitor the displacement of the aluminum plate in real time and compare it with the expected displacement of the CNC punching machine to determine whether the punching position has deviated. This effectively solves the technical problem of aluminum plate slippage causing punching position deviation in the prior art, improving punching accuracy and product qualification rate. The electric push rod and slide allow the ball to easily contact or separate from the aluminum plate, improving operational convenience.

Description

Technical Field

[0001] This utility model relates to the field of CNC punching technology, and in particular to an anti-offset positioning auxiliary structure for CNC punching of aluminum plates. Background Technology

[0002] Perforated aluminum panels, as an important building decoration material, are widely used in building curtain walls, interior decoration, and other fields. Their production process typically employs CNC punching machines to create various regular or irregular holes in the aluminum sheet. However, in existing CNC punching processes, due to the generally smooth surface of the aluminum sheet and the small clamping area of ​​the CNC punching machine's fixtures, the clamping pressure is often limited to avoid damaging the aluminum sheet surface. This smooth surface characteristic and limited clamping force make it easy for the aluminum sheet to slip at the fixture when the CNC punching machine moves to perform the punching operation. Once the aluminum sheet slips, its actual movement position will deviate from the preset movement position of the CNC punching machine, causing subsequent punching position offsets. This offset in punching position directly affects the pattern accuracy and overall aesthetics of the perforated aluminum panel, and in severe cases, can even lead to the scrapping of the entire aluminum panel, increasing production costs and material waste. Therefore, effectively monitoring and preventing positional deviation of aluminum plates during CNC punching, and improving punching accuracy and product yield, is a pressing technical problem in the current production of perforated aluminum panels. Existing technologies urgently need improvement to address these issues. Utility Model Content

[0003] This utility model discloses an anti-offset positioning auxiliary structure for CNC punching of aluminum plates, which aims to solve the technical problem that aluminum plates are prone to positional offset during CNC punching.

[0004] The anti-deviation positioning auxiliary structure includes a mounting unit fixed to a CNC punch press, a detection unit that contacts the aluminum plate, and a sensing unit that detects the movement data of the aluminum plate. The mounting unit is used to fix the mounting rod to the CNC punch press. The detection unit contacts the aluminum plate after the CNC punch press completes the positioning of the aluminum plate. The sensing unit obtains the movement data of the aluminum plate by detecting the movement of the detection unit.

[0005] Furthermore, the mounting unit includes a clamping plate, a clamping plate, and an adjusting bolt. The clamping plate is clamped to the edge of the CNC punching machine, the adjusting bolt is movably inserted through the bottom of the clamping plate and is spirally connected to the clamping plate, the clamping plate is slidably installed inside the clamping plate, and the top of the adjusting bolt abuts against the bottom of the clamping plate.

[0006] More specifically, the detection unit includes a contact, a drive, and a transmission. The drive is mounted on a mounting rod and is used to drive the contact closer to the aluminum plate via the transmission.

[0007] Preferably, the driving component is an electric push rod, with the driving end of the electric push rod abutting against the transmission component and the other end connected to the mounting rod. When the electric push rod retracts, the transmission component drives the contact component to contact the surface of the aluminum plate.

[0008] Furthermore, the transmission component includes a frame-shaped carriage.

[0009] More specifically, the contact element includes a mounting housing installed at the bottom of the carriage and a rolling ball disposed at the bottom of the mounting housing.

[0010] Preferably, the mounting shell is hollow, and a first rotating rod and a second rotating rod are installed on the bottom side inside the mounting shell. When the ball is subjected to gravity and abuts against the bottom of the mounting shell, there is a gap between the ball and the first rotating rod and the second rotating rod.

[0011] Furthermore, a bracket assembly for rotatably mounting the first and second rotating rods is installed on the bottom side inside the mounting housing, and the first and second rotating rods form a right angle.

[0012] More specifically, grating wheels are installed on the outer ends of both the first and second rotating rods, and a light-shielding shell with an open top is installed on the bracket assembly. The lower part of the grating wheel is movably disposed inside the light-shielding shell, and a photosensitive receiver and an infrared laser emitter are respectively disposed on both sides inside the light-shielding shell, with the photosensitive receiver and the infrared laser emitter facing each other.

[0013] Preferably, the grating wheel has a plurality of grid slots arranged in a circular array on the grating wheel.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention provides an anti-deviation positioning auxiliary structure for CNC punching of aluminum plates. It features a ball bearing that contacts the aluminum plate surface and rotates with the plate's movement. A first and second rotating rod, acting as abutments against the ball bearing, convert the ball's rotation into the rod's rotation. A sensing unit, consisting of a grating wheel on the first rotating rod and a cooperating infrared laser emitter and photosensitive receiver, accurately measures the actual movement distance of the aluminum plate during punching. This structure can monitor the aluminum plate's displacement in real time and compare it with the expected displacement of the CNC punching machine to determine if the punching position has deviated. This effectively solves the technical problem of aluminum plate slippage causing punching position deviation in existing technologies, improving punching accuracy and product yield. The electric push rod and carriage allow the ball bearing to easily contact or separate from the aluminum plate, improving operational convenience. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of the anti-offset positioning auxiliary structure for CNC punching of aluminum plates.

[0016] Figure 2 A schematic diagram of the mounting shell structure for the anti-offset positioning auxiliary structure of CNC punching of aluminum plates.

[0017] Figure 3 A schematic diagram of a carriage structure for anti-offset positioning auxiliary structure of CNC punching of aluminum plate.

[0018] Figure 4 A schematic diagram of the internal structure of the mounting housing for the anti-offset positioning auxiliary structure of CNC punching of aluminum plates.

[0019] Figure 5 A partial structural diagram of the anti-offset positioning auxiliary structure for CNC punching of aluminum plates.

[0020] In the diagram: 1. Clamping plate; 2. Adjusting bolt; 3. Clamping plate; 4. Mounting rod; 5. Mounting shell; 6. Ball bearing; 7. Electric push rod; 8. Slide carriage; 9. First rotating rod; 10. Second rotating rod; 11. Grating wheel; 12. Photosensitive receiver; 13. Infrared laser emitter; 14. Light-shielding shell; 15. Support assembly. Detailed Implementation

[0021] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] With the development of the building decoration industry, perforated aluminum panels are widely used due to their unique visual effects and functionality. Their production typically relies on CNC punching machines for precise punching. However, in actual production, due to factors such as the smooth surface of the aluminum plate and the limited clamping force of the CNC punching machine fixtures, the aluminum plate is prone to slippage during movement, leading to displacement of the punching position and ultimately scrapping the aluminum plate. This seriously affects production efficiency and product quality. To solve this technical problem, this utility model proposes an anti-displacement positioning auxiliary structure for CNC punching of aluminum plates. This structure measures the displacement of the aluminum plate in real time during movement to determine whether displacement has occurred, effectively improving punching accuracy.

[0024] This utility model's anti-offset positioning auxiliary structure is mainly used in conjunction with a CNC punch press for punching aluminum plates. The structure includes a mounting unit for fixing itself to the CNC punch press, a detection unit for contacting and moving with the aluminum plate surface, and a sensing unit for converting the movement of the detection unit into an electrical signal to obtain aluminum plate movement data. The mounting unit ensures the entire auxiliary structure remains stable during the punching process, providing a reference for accurate measurement. The detection unit directly contacts the aluminum plate surface, and its movement faithfully reflects the actual displacement of the aluminum plate. The sensing unit converts this actual displacement into a processable electrical signal for comparison with the expected displacement of the CNC punch press.

[0025] Specifically, see Figure 1 The anti-offset positioning auxiliary structure includes a clamping plate 1, an adjusting bolt 2, and a clamping plate 3. The clamping plate 1 and the clamping plate 3 cooperate to clamp the edge of the CNC punch press table. The adjusting bolt 2 is used to adjust the position of the clamping plate 3 relative to the clamping plate 1, thereby achieving reliable clamping of the CNC punch press table. The structure also includes a mounting rod 4, which is fixedly connected to the clamping plate 1 and the clamping plate 3, serving as a support beam for the entire auxiliary structure. Furthermore, a bracket assembly 15 is fixedly connected to the mounting rod 4, which provides mounting and guidance for subsequent moving parts.

[0026] See Figure 1 and Figure 3 A slide 8 is slidably connected to the support assembly 15, and the slide 8 can move up and down along the support assembly 15. An electric push rod 7 is also fixedly connected to the support assembly 15, and the push rod end of the electric push rod 7 abuts against the slide 8. By controlling the extension and retraction of the electric push rod 7, the slide 8 can be driven to slide up and down along the support assembly 15.

[0027] See Figure 1 , Figure 2 and Figure 4The mounting housing 5 is fixedly connected to the slide 8, thus allowing it to move up and down with the slide 8. A ball bearing 6 is located at the bottom of the mounting housing 5, partially protruding to abut against the upper surface of the aluminum plate placed on the CNC punching machine table. A first rotating rod 9 and a second rotating rod 10 are rotatably connected inside the mounting housing 5, their ends abutting against the outer surface of the ball bearing 6. As the ball bearing 6 rotates with the aluminum plate, friction drives the first rotating rod 9 and the second rotating rod 10 to rotate.

[0028] See Figure 4 and Figure 5 A grating wheel 11 is fixedly connected to the first rotating rod 9. An infrared laser emitter 13 and a photosensitive receiver 12 are also fixedly connected inside the mounting housing 5, with the infrared laser emitter 13 and the photosensitive receiver 12 arranged opposite to each other. A light-shielding shell 14 is disposed between the two, and the light-shielding shell 14 is also fixedly connected inside the mounting housing 5, with the grating wheel 11 disposed inside the light-shielding shell 14. When the grating wheel 11 rotates with the first rotating rod 9, its grating slits and opaque portions alternately block or allow the light emitted by the infrared laser emitter 13 to pass through, causing the photosensitive receiver 12 to receive alternating light signals of varying intensity, thereby generating a series of electrical pulse signals.

[0029] Unlike existing technologies that rely solely on the CNC punch press's own fixtures and positioning system, this invention's anti-deviation positioning auxiliary structure adds an independent system that directly measures the actual displacement of the aluminum plate. In existing technologies, fixture slippage is the root cause of deviation, and the CNC punch press's positioning system can only control the movement of the fixture, unable to detect whether the aluminum plate is slipping within it. This invention uses a ball bearing 6 that directly contacts the aluminum plate surface and measures the rotation of the ball bearing 6 using optical sensing principles to accurately calculate the actual movement distance of the aluminum plate. This direct measurement method is unaffected by fixture slippage and can accurately reflect the displacement of the aluminum plate, thus effectively detecting positional deviation during the punching process—an advantage not found in existing technologies.

[0030] When using the anti-offset positioning auxiliary structure of this utility model for CNC punching of aluminum plates, the entire structure is first securely fixed to the edge of the CNC punching machine table using the clamping plate 1, adjusting bolts 2, and clamping plate 3. Then, the aluminum plate to be punched is placed on the CNC punching machine table. After the CNC punching machine completes the initial positioning of the aluminum plate, the electric push rod 7 is retracted, thereby driving the slide 8 downwards, and the mounting shell 5 descends accordingly until the ball 6 at the bottom of the mounting shell 5 abuts against the upper surface of the aluminum plate. At this time, the weight of the mounting shell 5 ensures sufficient friction between the ball 6 and the aluminum plate. When the CNC punching machine moves the aluminum plate for punching, the friction between the aluminum plate and the ball 6 drives the ball 6 to roll and rotate with the movement of the aluminum plate. The rotation of the ball 6, through contact with the first rotating rod 9 and the second rotating rod 10, drives these two rotating rods to rotate. The rotation of the first rotating rod 9 drives the grating wheel 11 fixed on it to rotate synchronously. As the grating wheel 11 rotates within the light-shielding housing 14, it periodically blocks or allows the light emitted by the infrared laser emitter 13 to reach the photosensitive receiver 12, thereby generating a series of electrical pulse signals corresponding to the rotation angle of the grating wheel 11. These electrical pulse signals, after processing (e.g., by connecting to a CNC punching machine or a separate processor), accurately calculate the rotation angle, rotation speed, and rotation direction of the grating wheel 11. Then, based on the diameter of the ball 6 and the transmission relationship between the rotating rod and the ball, the actual moving distance of the aluminum plate during the punching process can be accurately calculated. By comparing this actual moving distance with the preset moving distance of the CNC punching machine, it is possible to determine in real time whether the aluminum plate is slipping and the amount of offset caused by slippage. Once offset is detected, timely measures can be taken, such as stopping punching, triggering an alarm, or making compensatory adjustments, thereby effectively avoiding the generation of defective products due to offset. In this process, the clamping plate 1, adjusting bolt 2, clamping plate 3, and mounting rod 4 provide a stable mounting base; the bracket assembly 15 provides guidance and support for the carriage 8 and the electric push rod 7; the electric push rod 7 and carriage 8 achieve reliable contact and separation between the ball 6 and the aluminum plate; the mounting shell 5 houses and protects the ball 6 and the sensing element; the ball 6, as a contact element, converts the linear movement of the aluminum plate into its own rotation; the first rotating rod 9 and the second rotating rod 10 transmit the rotation of the ball 6 to the sensing element; the grating wheel 11, the infrared laser emitter 13, the photosensitive receiver 12, and the light-shielding shell 14 together constitute a high-precision optical displacement sensing system, realizing accurate measurement of the actual moving distance of the aluminum plate.

[0031] Furthermore, this application also proposes that the installation unit includes a clamping plate 1, a clamping plate 3, and an adjusting bolt 2. The clamping plate 1 is clamped to the edge of the CNC punching machine, the adjusting bolt 2 is movably inserted through the bottom of the clamping plate 1 and is spirally connected to the clamping plate 1, the clamping plate 3 is slidably installed inside the clamping plate 1, and the top of the adjusting bolt 2 abuts against the bottom of the clamping plate 3.

[0032] See Figure 1This mounting unit securely fixes the entire anti-offset positioning auxiliary structure to the edge of the CNC punch press table. Specifically, the clamping plate 1 is designed with an L-shaped cross-section, one side of which can be clamped onto the upper surface edge of the CNC punch press table. The clamping plate 3 is designed as a flat plate structure and is slidably installed within the clamping plate 1. The adjusting bolt 2 movably passes through the bottom of the clamping plate 1 and is threadedly connected to the clamping plate 3. By rotating the adjusting bolt 2, the clamping plate 3 can be driven to move up or down within the clamping plate 1. When the clamping plate 3 moves upward, its lower surface abuts against the lower surface of the CNC punch press table, thereby cooperating with the clamping plate 1 clamped onto the upper surface of the table, forming a reliable clamping and fixing of the edge of the CNC punch press table.

[0033] The L-shaped structure of the clamping plate 1 and the flat plate structure of the clamping plate 3 constitute a simple and effective clamping method. By adjusting the screw drive of the adjusting bolt 2, the position of the clamping plate 3 can be easily adjusted to adapt to the edges of CNC punching machine table surfaces of different thicknesses, achieving tight and reliable clamping. This clamping method has a compact structure, is easy to operate, and can provide sufficient fixing force to ensure the stability of the entire anti-offset positioning auxiliary structure during CNC punching machine operation.

[0034] The mounting unit employs a clamping structure consisting of a clamping plate 1, adjusting bolts 2, and a clamping plate 3, which allows for convenient and quick secure fixing of the anti-offset positioning auxiliary structure to the edge of the CNC punching machine's table. This stable mounting method provides a reliable benchmark for subsequent aluminum plate displacement measurement, preventing the auxiliary structure's own wobbling from affecting measurement accuracy. Compared to other possible fixing methods, this clamping structure offers excellent adaptability and stability, effectively improving the practicality and measurement accuracy of the entire anti-offset positioning auxiliary structure.

[0035] Furthermore, this application also proposes that the detection unit includes a contact, a drive, and a transmission, wherein the drive is mounted on a mounting rod and is used to drive the contact closer to the aluminum plate via the transmission.

[0036] See Figure 1 and Figure 3 This detection unit is the part of the anti-offset positioning auxiliary structure responsible for making physical contact with the surface of the aluminum plate and sensing its movement. The detection unit mainly consists of a contact element, a driving element, and a transmission element. The driving element is mounted on the mounting rod 4 and its function is to provide power or displacement, which, through the transmission element, drives the contact element to move towards the aluminum plate, so that the contact element can reliably contact the surface of the aluminum plate placed on the CNC punching machine table.

[0037] The contact element is the component that directly contacts the surface of the aluminum plate and moves with the plate. The drive element is the component that generates motion or force; it can be an electric actuator, cylinder, motor with lead screw, etc., used to control the contact element's movement towards or away from the aluminum plate. The transmission element is the component that transmits motion and force between the drive element and the contact element, and may also act as a guide to ensure that the contact element accurately contacts the aluminum plate along a predetermined path. Through the cooperation of the drive element, transmission element, and contact element, the contact state between the contact element and the aluminum plate is controlled, allowing the measurement process to be initiated when needed.

[0038] The design of this detection unit, particularly the control of the contact element's contact with the aluminum plate via the drive and transmission components, enables the anti-offset positioning auxiliary structure to actively establish contact with the aluminum plate. This allows the structure to accurately place the contact element onto the aluminum plate surface after positioning, ensuring the measuring mechanism functions correctly. Compared to designs relying solely on gravity or other passive methods for contact, this approach offers more flexible and reliable contact control, improving the system's adaptability and ease of operation.

[0039] Furthermore, this application also proposes that the driving component is an electric push rod 7, the driving end of which abuts against the transmission component, and the other end is connected to the mounting rod 4. When the electric push rod 7 retracts, the transmission component drives the contact component to contact the surface of the aluminum plate.

[0040] See Figure 1 and Figure 3 In this detection unit, the driving component is specifically implemented using an electric push rod 7. One end of the electric push rod 7 is fixedly connected to the mounting rod 4, and its driving end (i.e., the extension end of the push rod) abuts against the transmission component. The electric push rod 7 is an actuator that can convert electrical energy into linear reciprocating motion. By controlling the forward and reverse rotation of its internal motor, the extension and retraction of the push rod can be achieved.

[0041] In a preferred embodiment, the electric actuator 7 is mounted on the mounting rod 4 and arranged vertically downwards. Its drive end abuts against the top of the transmission member. When the electric actuator 7 receives a control signal and performs a retraction action, its push rod retracts upwards. Since the push rod end abuts against the transmission member, the retraction force acts on the transmission member, thereby driving the contact member connected to the transmission member to move downwards. When the electric actuator 7 is fully retracted, the transmission member and the contact member also move to a preset position, allowing the contact member to reliably contact the surface of the aluminum plate placed below. Conversely, when the electric actuator 7 extends, it drives the transmission member and the contact member to move upwards, separating them from the surface of the aluminum plate.

[0042] Using an electric actuator 7 as the driving component enables precise control of the contact process between the contact element and the aluminum plate. By controlling the on / off state or the stroke of the electric actuator 7, the descent and ascent of the contact element can be easily controlled, ensuring that the contact element accurately positions itself and contacts the aluminum plate when measurement is required, and promptly lifts itself when measurement is not needed or the aluminum plate needs to be replaced, avoiding interference. This active control method improves the system's automation level and ease of operation, and allows for adjustment of the contact pressure (by controlling the thrust or stroke of the electric actuator) according to actual needs, thereby ensuring appropriate friction between the ball 6 and the aluminum plate and ensuring measurement accuracy. The introduction of the electric actuator 7 makes the contact action of the detection unit more reliable and controllable, and is one of the key elements in achieving accurate displacement measurement.

[0043] Furthermore, this application also proposes that the transmission component includes a frame-shaped carriage 8.

[0044] See Figure 1 and Figure 3 In this detection unit, the transmission component is specifically implemented using a frame-shaped carriage 8. The carriage 8 is slidably mounted on the support assembly 15 and abuts against the drive end of the electric push rod 7. The frame structure of the carriage 8 provides it with good structural strength and stability, while its internal space can be used to install other components.

[0045] In a preferred embodiment, the carriage 8 is designed as a rectangular frame, with its sides engaging with guide rails or guide posts on the support assembly 15, thereby enabling smooth vertical sliding on the support assembly 15. The drive end of the electric push rod 7 abuts against the top crossbeam of the carriage 8. When the electric push rod 7 retracts, it transmits an upward force to the carriage 8 through the abutment action, causing the carriage 8 to move downward. When the electric push rod 7 extends, it transmits a downward force to the carriage 8, causing the carriage 8 to move upward. The bottom of the carriage 8 is used to mount a contact element, such as a mounting housing 5.

[0046] The carriage 8, acting as a transmission component, not only transmits the linear motion of the electric push rod 7 to the contact element but also serves as a guide, ensuring that the contact element can smoothly rise and fall along a predetermined vertical path. Its frame structure provides a stable mounting platform, reliably supporting the mounting housing 5 and the internal measuring components. Using the carriage 8 as a transmission component is simple and reliable, effectively converting the motion of the drive component into precise lifting and lowering motion of the contact element, thus guaranteeing reliable contact and separation between the ball 6 and the aluminum plate.

[0047] Furthermore, this application also proposes that the contact element includes a mounting housing 5 installed at the bottom of the carriage and a rolling ball 6 rolled at the bottom of the mounting housing 5.

[0048] See Figure 1 , Figure 2 and Figure 4 In this detection unit, the contact element specifically consists of a mounting housing 5 and a ball bearing 6. The mounting housing 5 is fixedly connected to the bottom of the slide 8, and therefore can rise and fall together with the slide 8. The ball bearing 6 is rotatably disposed at the bottom of the mounting housing 5.

[0049] In a preferred embodiment, the mounting shell 5 is designed as a shell with a certain weight, and its bottom has a hole. The ball 6 is housed inside the mounting shell 5 and is allowed to roll freely at the bottom of the mounting shell 5 by a certain structure (such as a retaining ring, bearing seat, etc.), while part of the ball can be exposed through the bottom hole. When the mounting shell 5 descends with the slide 8, the exposed part of the ball 6 will contact the surface of the aluminum plate below. Since the mounting shell 5 has a certain weight, gravity will act on the ball 6, so that the ball 6 and the surface of the aluminum plate will generate sufficient positive pressure, thereby forming a reliable frictional contact. When the aluminum plate moves under the drive of the CNC punch press, the ball 6 will roll on the surface of the aluminum plate due to friction, and its rotation faithfully reflects the planar displacement of the aluminum plate.

[0050] The mounting housing 5 not only serves as the mounting carrier for the rolling ball 6, but its own weight also provides the necessary pressure for the frictional contact between the rolling ball 6 and the aluminum plate, ensuring that the rolling ball 6 can reliably rotate with the movement of the aluminum plate. As the component in direct contact with the aluminum plate, the rolling ball 6's rolling characteristics convert the linear displacement of the aluminum plate into its own rotation, providing a basis for subsequent displacement measurement. Using the rolling ball 6 as the contact element has advantages such as small contact area, low frictional resistance, and the ability to adapt to uneven aluminum plate surfaces, which is beneficial for achieving accurate displacement measurement. The cooperation between the mounting housing 5 and the rolling ball 6 is a key structure for realizing aluminum plate displacement sensing.

[0051] Furthermore, this application also proposes that the mounting shell 5 is provided with a cavity, and a first rotating rod 9 and a second rotating rod 10 are installed on the bottom side inside the mounting shell 5. When the ball 6 is subjected to gravity and abuts against the bottom of the mounting shell 5, there is a gap between it and the first rotating rod 9 and the second rotating rod 10.

[0052] See Figure 4 The mounting housing 5 is designed with an internal cavity to accommodate the ball 6 and subsequent sensing and transmission elements. A first rotating rod 9 and a second rotating rod 10 are mounted on the bottom side inside the mounting housing 5. The ball 6 is located at the bottom of the mounting housing 5 and is capable of rolling within the cavity.

[0053] In a preferred embodiment, the cavity shape of the mounting housing 5 matches the arrangement of the internal components. The first rotating rod 9 and the second rotating rod 10 are mounted on the bottom side inside the mounting housing 5 via a rotatable connection structure (e.g., a bearing). The ball 6 is placed below the first rotating rod 9 and the second rotating rod 10. When the mounting housing 5 descends and the ball 6 contacts the aluminum plate, the ball 6 experiences an upward reaction force and, under its own weight, abuts against the bottom structure of the mounting housing 5. At this time, the ends of the first rotating rod 9 and the second rotating rod 10 abut against the outer surface of the ball 6. However, according to the definition of this claim, when the ball 6 abuts against the bottom of the mounting housing 5 under its own weight, there is a gap between the ball 6 and the first rotating rod 9 and the second rotating rod 10. This means that when the ball 6 is not in contact with the aluminum plate or is only under its own weight, there is no contact or very little contact force between the ball 6 and the rotating rods. Only when the ball 6 contacts the aluminum plate and receives an upward supporting force will the ball 6 move upward, reliably contacting the first rotating rod 9 and the second rotating rod 10, and driving the rotating rods to rotate through friction.

[0054] The cavity design of the mounting housing 5 provides space for the arrangement of internal components. The installation position and method of the first rotating rod 9 and the second rotating rod 10, as well as the clearance setting between the ball 6 and them, are key to enabling the ball to rotate and drive the rotating rod. The existence of this clearance ensures that there is no unnecessary contact and wear between the ball and the rotating rod in the non-operating state, extending the service life of the components. At the same time, when the ball contacts the aluminum plate and is supported, it can reliably establish contact with the rotating rod and transmit rotation, ensuring the effectiveness of displacement measurement. This structural design enables the rotation of the ball to effectively drive the subsequent sensing elements, which is the foundation for realizing displacement measurement.

[0055] Furthermore, this application also proposes that a bracket assembly 15 for rotatably mounting the first rotating rod 9 and the second rotating rod 10 is installed on the bottom side inside the mounting housing 5, and the first rotating rod 9 and the second rotating rod 10 form a right angle.

[0056] See Figure 4 Inside the mounting housing 5, on its bottom side, is a bracket assembly 15 for rotatably mounting the first rotating rod 9 and the second rotating rod 10. This bracket assembly 15 provides rotatable support for the first rotating rod 9 and the second rotating rod 10. Furthermore, the first rotating rod 9 and the second rotating rod 10 are arranged perpendicular to each other, forming a right angle.

[0057] In a preferred embodiment, the support assembly 15 may include a bearing seat or bearing hole for supporting the shafts of the first rotating rod 9 and the second rotating rod 10, allowing them to rotate freely. The first rotating rod 9 and the second rotating rod 10 are mounted on the support assembly 15 such that their shafts are perpendicular to each other, and their ends are located below or to the side of the ball 6 so as to abut against the outer surface of the ball 6. For example, the shaft of the first rotating rod 9 may be parallel to the X-axis of the CNC punch press, while the shaft of the second rotating rod 10 may be parallel to the Y-axis of the CNC punch press. When the ball 6 contacts the aluminum plate and moves with the aluminum plate, the movement of the aluminum plate in the X-direction drives the ball 6 to rotate about an axis parallel to the Y-axis. This rotation is transmitted to the first rotating rod 9 through friction, causing it to rotate. Similarly, the movement of the aluminum plate in the Y-direction drives the ball 6 to rotate about an axis parallel to the X-axis. This rotation is transmitted to the second rotating rod 10 through friction, causing it to rotate.

[0058] The support assembly 15 provides stable rotational support for the first rotating rod 9 and the second rotating rod 10, ensuring smooth rotation. The right-angle design between the first rotating rod 9 and the second rotating rod 10 allows them to sense and measure the rotation of the ball 6 in two mutually perpendicular directions, corresponding to the displacement of the aluminum plate in the X and Y axes of the CNC punch press. This dual-rotor, right-angled design allows for the measurement of the aluminum plate's two-dimensional displacement in a single ball, resulting in a compact and functional structure. This structure is a key component in realizing the two-dimensional displacement measurement of the aluminum plate.

[0059] Furthermore, this application also proposes that grating wheels 11 are installed on the outer ends of the first rotating rod 9 and the second rotating rod 10, and a light-shielding shell 14 with an open top is installed on the bracket assembly 15. The lower part of the grating wheel 11 is movably disposed inside the light-shielding shell 14. A photosensitive receiver 12 and an infrared laser emitter 13 are respectively disposed on both sides inside the light-shielding shell 14, and the photosensitive receiver 12 and the infrared laser emitter 13 are arranged facing each other.

[0060] See Figure 4 and Figure 5 In this sensing unit, grating wheels 11 are installed on the outer ends (i.e., the ends away from the rolling ball 6) of both the first rotating rod 9 and the second rotating rod 10. The grating wheel 11 is a disc with periodically transparent and opaque grating slits. A light-shielding shell 14 with an open top is installed on the support assembly 15. The lower part of the grating wheel 11 is arranged inside the light-shielding shell 14. An infrared laser emitter 13 and a photosensitive receiver 12 are fixedly installed on both sides inside the light-shielding shell 14, respectively, facing each other, so that the light emitted by the infrared laser emitter 13 can pass through the grating wheel 11 and reach the photosensitive receiver 12.

[0061] In a preferred embodiment, the grating wheel 11 is fixedly connected to the shaft ends of the first rotating rod 9 and the second rotating rod 10 by means of keys, pins, or threads, ensuring synchronous rotation with the rotating rods. The light-shielding shell 14 is designed with a U-shaped or groove-shaped structure, with an open top for easy installation and maintenance of the grating wheel 11, while its sidewalls provide mounting positions for the infrared laser emitter 13 and the photosensitive receiver 12, and can block external stray light from interfering with the measurement. The infrared laser emitter 13 can be an infrared light-emitting diode, and the photosensitive receiver 12 can be a photodiode or a phototransistor. The two are arranged opposite each other, so that the light path passes through the grating slit of the grating wheel 11. When the grating wheel 11 rotates, the grating slit and the opaque part alternately pass through the light path, causing the light intensity received by the photosensitive receiver 12 to change periodically, thereby outputting a series of electrical pulse signals. By counting and processing these electrical pulse signals, the rotation angle and speed of the grating wheel 11 can be accurately measured.

[0062] The grating wheel 11, infrared laser emitter 13, photosensitive receiver 12, and light-shielding shell 14 together constitute a photoelectric encoder-type displacement sensing system. The grating wheel 11 is mounted on the first rotating rod 9 and the second rotating rod 10, so that the rotation of the rotating rod is converted into the rotation of the grating wheel, which in turn generates an electrical signal through photoelectric conversion. This non-contact optical measurement method has advantages such as high accuracy, fast response speed, and strong anti-interference ability. By measuring the rotation of the first rotating rod 9 and the second rotating rod 10, the rotation of the ball 6 can be indirectly measured, and the displacement of the aluminum plate in the X and Y directions can be calculated. This sensing unit is the core component for accurately measuring the displacement of the aluminum plate, providing a reliable data source for determining whether the punching position has shifted.

[0063] Furthermore, this application also proposes that the grating wheel 11 has a plurality of grating slots, which are arranged in a ring array on the grating wheel 11.

[0064] See Figure 4 and Figure 5 In this sensing unit, the grating wheel 11 is a key component for realizing photoelectric encoding measurement. The grating wheel 11 has several light-transmitting grating slots on its circumference, which are arranged in a circular array, either uniformly or non-uniformly, along the circumferential direction. The portions between the grating slots are typically opaque.

[0065] In a preferred embodiment, the grid grooves of the grating wheel 11 can be formed by etching, laser processing, or precision machining. The number and distribution density of the grid grooves determine the resolution of the grating wheel, i.e., how many pulse signals it can generate per revolution. The grid grooves are arranged in a circular array, so that when the grating wheel rotates, the grating slits and opaque parts on its circumference can periodically pass through the optical path between the infrared laser emitter 13 and the photosensitive receiver 12. When light passes through the grating slits, the photosensitive receiver 12 receives the light signal; when the light is blocked by the opaque parts, the photosensitive receiver 12 does not receive the light signal. Thus, the photosensitive receiver 12 outputs a series of electrical pulse signals corresponding to the rotation of the grating wheel. By counting and processing these pulse signals, the rotation angle and speed of the grating wheel can be accurately measured.

[0066] The grating wheel 11 has a ring-shaped array of grid slots, which is the foundation for realizing the function of the photoelectric encoder. This structure allows the rotation of the grating wheel to be accurately converted into a recognizable electrical signal sequence, thereby realizing the digital measurement of rotational displacement. This feature further refines the structure of key components of the sensing unit, ensuring high accuracy and reliability of displacement measurement, and is one of the technical guarantees for the effective operation of the entire anti-offset positioning auxiliary structure.

[0067] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. An anti-offset positioning auxiliary structure for CNC punching of aluminum plates, characterized in that: include: It includes a mounting unit fixed to a CNC punching machine, a mounting rod (4), a detection unit that contacts the aluminum plate, and a sensing unit that detects the movement data of the aluminum plate; The mounting unit is used to fix the mounting rod (4) on the CNC punching machine. The detection unit contacts the aluminum plate after the CNC punching machine completes the aluminum plate positioning. The sensing unit obtains the aluminum plate movement data by detecting the movement of the detection unit.

2. The anti-offset positioning auxiliary structure for CNC punching of aluminum plates according to claim 1, characterized in that: The installation unit includes a clamping plate (1), a clamping plate (3), and an adjusting bolt (2). The clamping plate (1) is clamped on the edge of the CNC punching machine. The adjusting bolt (2) is movably inserted through the bottom of the clamping plate (1) and is spirally connected to the clamping plate (1). The clamping plate (3) is slidably installed inside the clamping plate (1). The top of the adjusting bolt (2) abuts against the bottom of the clamping plate (3).

3. The anti-offset positioning auxiliary structure for CNC punching of aluminum plates according to claim 2, characterized in that: The detection unit includes a contact, a drive and a transmission. The drive is mounted on the mounting rod (4) and is used to drive the contact closer to the aluminum plate through the transmission.

4. The anti-offset positioning auxiliary structure for CNC punching of aluminum plates according to claim 3, characterized in that: The driving component is an electric push rod (7). The driving end of the electric push rod (7) abuts against the transmission component, and the other end is connected to the mounting rod (4). When the electric push rod (7) retracts, the transmission component drives the contact component to contact the surface of the aluminum plate.

5. The anti-offset positioning auxiliary structure for CNC punching of aluminum plates according to claim 4, characterized in that: The transmission component includes a frame-shaped carriage (8).

6. The anti-offset positioning auxiliary structure for CNC punching of aluminum plates according to claim 5, characterized in that: The contact element includes a mounting housing (5) installed at the bottom of the carriage (8) and a rolling ball (6) rolled at the bottom of the mounting housing (5).

7. The anti-offset positioning auxiliary structure for CNC punching of aluminum plates according to claim 6, characterized in that: The mounting shell (5) is hollow. A first rotating rod (9) and a second rotating rod (10) are installed on the bottom side inside the mounting shell (5). When the ball (6) is subjected to gravity and abuts against the bottom of the mounting shell (5), there is a gap between it and the first rotating rod (9) and the second rotating rod (10).

8. The anti-offset positioning auxiliary structure for CNC punching of aluminum plates according to claim 7, characterized in that: The mounting housing (5) has a bracket assembly (15) for rotating the first rotating rod (9) and the second rotating rod (10) on its bottom side, and the first rotating rod (9) and the second rotating rod (10) form a right angle.

9. The anti-offset positioning auxiliary structure for CNC punching of aluminum plates according to claim 8, characterized in that: The outer ends of the first rotating rod (9) and the second rotating rod (10) are both equipped with grating wheels (11). The bracket assembly (15) is equipped with a light-shielding shell (14) with an open top. The lower part of the grating wheel (11) is movably disposed inside the light-shielding shell (14). A photosensitive receiver (12) and an infrared laser emitter (13) are respectively disposed on both sides inside the light-shielding shell (14). The photosensitive receiver (12) and the infrared laser emitter (13) are arranged opposite to each other.

10. The anti-offset positioning auxiliary structure for CNC punching of aluminum plates according to claim 9, characterized in that: The grating wheel (11) has a plurality of grid slots, which are arranged in a ring array on the grating wheel (11).

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