Automatic mechanism for controlling the length of a hem

Abstract

The utility model provides a kind of upper swing automatic machine control size mechanism belongs to lens processing technical field.The upper swing automatic machine control size mechanism, including fixed disc and fixed disc top end bolt fixed with bearing frame, it is characterized by: bearing frame side wall bolt fixed with sensing component, and outer end surface is equipped with pneumatic cylinder, inner end surface is equipped with linear movement matrix, linear movement matrix is equipped with guiding mechanism between bearing frame, and tail end and pneumatic cylinder telescopic end fixed connection, linear movement matrix inside is equipped with control size component, control size component bottom end is equipped with grinding fixture assembly, grinding fixture assembly is installed in linear movement matrix inner bottom, wherein, through the synergic cooperation of pneumatic cylinder and linear movement matrix and guiding mechanism, so that control size component micrometer and the sensor of sensing component form "sharp point fixed-point contact" cooperation, can effectively solve the problem that traditional upper swing automatic machine lacks special control size mechanism.

Description

Technical Field

[0001] This application relates to the field of lens processing technology, and more specifically, to an automatic upper swing machine dimensional control mechanism. Background Technology

[0002] In the optical manufacturing industry, lenses, as core optical components, directly determine the imaging quality and performance of optical instruments through their processing precision. They are widely used in numerous fields such as camera lenses, microscopes, eyeglass lenses, and automotive cameras. With the rapid development of industries such as consumer electronics, automotive electronics, and optical instruments, the market's requirements for lens precision are becoming increasingly stringent. Not only are extremely high surface finishes required, but also micron- or even nanometer-level control standards are being imposed on key dimensional parameters such as the radius of curvature, thickness tolerance, and edge dimensions. This makes lens finishing a core step in the optical manufacturing process.

[0003] Automatic top-mounted mirror machines, with their stable automated operation, adjustable processing stroke, and strong adaptability, are increasingly being used in the field of lens finishing, primarily for key processes such as edge grinding, surface polishing, and thickness adjustment. Compared to traditional manual processing or semi-automated equipment, automatic top-mounted mirror machines reduce errors caused by manual operation, improve processing efficiency, and meet the needs of mass production of lenses, making them an important equipment choice for automation upgrades in the current lens finishing field. However, current automatic top-mounted mirror machines used in lens finishing generally lack dedicated dimensional control mechanisms. This technical deficiency creates a significant contradiction with the stringent dimensional accuracy requirements of lens finishing, directly hindering the improvement of lens processing quality and production efficiency. Utility Model Content

[0004] To overcome the above deficiencies, this application provides an automatic swing control mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is as follows: An automatic swing-up control mechanism includes a fixed plate and a support frame bolted to the top of the fixed plate. The support frame is characterized by: a sensing component bolted to its side wall; a pneumatic cylinder mounted on its outer surface; a linear moving base on its inner surface; a guide mechanism between the linear moving base and the support frame; and a fixed connection between the tail end of the guide mechanism and the telescopic end of the pneumatic cylinder. A control component is installed inside the linear moving base, and a grinding fixture assembly is mounted at the bottom of the control component. The grinding fixture assembly is installed at the bottom of the linear moving base.

[0006] Furthermore, the sensing component consists of a side frame and a sensor. One end of the side frame is bolted to the side wall of the support frame, and the other end is equipped with the sensor. The sensing end of the sensor faces upward and makes fixed contact with the tip of the dimensional control component.

[0007] Furthermore, the linear moving base is composed of a base frame, a top block, a clamping block, and two side plates. The outer end of the base frame matches the inner end of the bearing frame and is equipped with the guide mechanism. The top block is bolted to the top of the base frame and its tail end is fixedly connected to the telescopic end of the pneumatic cylinder. The clamping block is bolted to the inner end of the base frame. The two side plates are respectively fixedly installed on both sides of the top block and the clamping block.

[0008] Furthermore, the guiding mechanism consists of a slide rod and a slider. The slide rod is vertically fixed inside the base frame, and the slider is bolted to the groove on the inner end face of the support frame and slidably connected to the outer wall of the slide rod.

[0009] Furthermore, the dimensional control component comprises a drive cylinder, a mounting bracket, a clamping hole, a dial indicator, and an adapter assembly. The fixed end of the drive cylinder is bolted to the bottom of the top block, and the drive end is fixedly connected to the mounting bracket. The top of the mounting bracket has the clamping hole, and the inner bottom end is equipped with the grinding fixture assembly. The adapter assembly is installed inside the clamping hole, and the dial indicator is equipped inside the adapter assembly. The tip of the dial indicator is in fixed contact with the sensing end of the sensor.

[0010] Furthermore, the adapter assembly consists of an adapter cylinder, three nut holes, three threaded rods, and three fixing heads. The adapter cylinder is installed inside the clamping hole, and the outer wall has three nut holes at equal intervals. The outer walls of the three threaded rods are respectively threaded to the inner rings of the three nut holes, and their opposite ends are respectively axially connected to the three fixing heads. The opposite ends of the three fixing heads are fastened to the outer wall of the dial indicator.

[0011] Furthermore, the grinding fixture assembly consists of a ejector pin, a clamping cylinder, and a threaded hole. The top end of the ejector pin is fixedly connected to the mounting bracket, and its tip extends into the interior of the clamping cylinder. The clamping cylinder is installed inside the clamping block, and the threaded hole is provided on its side wall. The threaded hole is threadedly connected to an external air pipe.

[0012] This utility model has the following beneficial effects: In this invention, the dial indicator and the sensor in the dimensional control component form a "point-to-point contact" connection. The dial indicator can capture the displacement changes of the grinding fixture assembly in real time, while the sensor converts the displacement data into electrical signals for feedback, enabling micron-level monitoring of lens processing dimensions (such as thickness and curvature adaptation displacement). Compared to traditional dimensional control devices, this structure can control dimensional errors within ±0.001mm, fully meeting the precision requirements of high-end lenses (such as AR / VR lenses and automotive lens lenses), and significantly reducing product scrap rates due to dimensional deviations. Furthermore, the drive cylinder can drive the mounting frame to fine-tune the grinding fixture assembly in real time based on the feedback data from the dial indicator and sensor, promptly compensating for dimensional deviations caused by mechanical wear (such as wear on grinding components) and temperature fluctuations. For example, in the lens thickness trimming process, if the thickness exceeds the tolerance range, the drive cylinder can immediately adjust the pressing depth of the grinding fixture assembly to avoid batch dimensional deviation problems.

[0013] This utility model's adapter component, through the cooperation of three threaded rods and a fixing head, can quickly clamp different models of dial indicators, adapting to monitoring scenarios with different accuracy requirements without changing the mounting bracket.

[0014] Traditional automatic grinding machines require a "processing-offline inspection-rework" process to ensure accuracy. This new mechanism, however, ensures dimensional compliance during processing through real-time dimensional control and dynamic adjustment. It eliminates the need for manual inspection of lenses using external precision instruments (such as laser thickness gauges), significantly shortening the processing cycle for a single lens and increasing production efficiency by over 30%. Furthermore, a pneumatic cylinder drives the linearly moving base to achieve overall displacement, while the cylinder controls fine-tuning of the dimensional control components. The entire process requires no manual intervention, reducing human error and lowering the workload for workers. Additionally, the grinding fixture assembly connects to an external air pipe via a clamping cylinder, enabling rapid pneumatic clamping and release of lenses. The single lens clamping time is reduced to less than 10 seconds, further improving batch processing efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the upper swing automatic control mechanism provided in the embodiments of this application; Figure 2 A schematic diagram of the back structure of the upper swing automatic machine inch control mechanism provided in the embodiments of this application; Figure 3A schematic diagram of the connection structure between the sensing component and the support frame provided in an embodiment of this application; Figure 4 A schematic diagram of the guiding mechanism structure provided for the embodiments of this application; Figure 5 A schematic diagram of a linearly moving base structure provided for an embodiment of this application; Figure 6 A schematic diagram of the connection structure between the dimensional control component and the grinding fixture assembly provided in the embodiments of this application; Figure 7 A schematic diagram of the adapter component structure provided for an embodiment of this application; Figure 8 A top view of the threaded rod and fixed head provided for an embodiment of this application.

[0017] In the diagram: 1-Fixed plate; 2-Bearing frame; 3-Sensing component; 4-Pneumatic cylinder; 5-Linear movement base; 6-Guiding mechanism; 7-Dimensioning component; 8-Grinding fixture assembly; 31-Side frame; 32-Sensor; 51-Base frame; 52-Top block; 53-Clamping block; 54-Side plate; 61-Slide rod; 62-Slider; 71-Drive cylinder; 72-Mounting frame; 73-Clamping hole; 74-Dial indicator; 75-Adapter component; 751-Adapter cylinder; 752-Nut hole; 753-Threaded rod; 754-Fixed head; 81-Ejector pin; 82-Clamping cylinder; 83-Threaded hole. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model. Example

[0019] Please see Figure 1 , Figure 2 , Figure 3 An automatic swing control mechanism includes a fixed plate 1 and a support frame 2 bolted to the top of the fixed plate 1.

[0020] The fixed plate 1 serves as the installation reference and connection hub for the entire mechanism, used to securely fix the mechanism to external machinery. It not only provides solid support for the support frame 2, but also acts as the final foundation platform, ensuring that all functional components, such as the sensing component 3, pneumatic cylinder 4, linear motion base 5, guiding mechanism 6, dimensional control component 7, and grinding fixture assembly 8, can achieve precise assembly and stable operation.

[0021] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 An automatic swing-up control mechanism includes a support frame 2 with a sensing component 3 bolted to its side wall, a pneumatic cylinder 4 mounted on its outer end surface, a linear motion base 5 mounted on its inner end surface, a guide mechanism 6 assembled between the linear motion base 5 and the support frame 2, and a tail end fixedly connected to the telescopic end of the pneumatic cylinder 4. A control component 7 is installed inside the linear motion base 5, and a grinding fixture assembly 8 is mounted at the bottom of the control component 7, which is installed at the bottom of the linear motion base 5. The sensing component 3 consists of a side frame 31 and... The sensor 32 is composed of a linear motion base 5 consisting of a base frame 51, a top block 52, a clamping block 53, and two side plates 54; the guide mechanism 6 consists of a slide rod 61 and a slider 62; the dimensional control component 7 consists of a drive cylinder 71, a mounting bracket 72, a clamping hole 73, a dial indicator 74, and an adapter component 75; the adapter component 75 consists of an adapter cylinder 751, three nut holes 752, three threaded rods 753, and three fixing heads 754; the grinding fixture assembly 8 consists of a top pin 81, a clamping cylinder 82, and a threaded hole 83.

[0022] The sensing component 3 is responsible for converting electrical signals. The side bracket 31 is fixed to the support frame 2, facilitating the installation of the sensor 32 and ensuring its perpendicularity to the dial indicator 74. The sensor 32 has an extremely fast response speed, enabling millisecond-level real-time monitoring, ensuring the control system can stop processing at the most appropriate moment, effectively avoiding overcutting or undercutting. Furthermore, the combination of the sensor 32 and the dial indicator 74 achieves the conversion of high-precision mechanical displacement into easily processed electrical signals, and the non-contact measurement avoids the influence of mechanical wear and measurement force on the results.

[0023] Among them, the pneumatic cylinder 4 serves as the core power source, directly driving the linear moving base 5 to reciprocate along the vertical direction.

[0024] The linear motion base 5 is responsible for the installation and movement of the dimensional control component 7 and the grinding fixture assembly 8. The base frame 51 serves as the main skeleton and cooperates with the support frame 2 to facilitate the support of the drive cylinder 71 and the clamping cylinder 82. The top block 52 is fixed to the top of the base frame 51 and can drive the vertical movement of the entire linear motion base 5 through the pneumatic cylinder 4 at the tail end. The clamping block 53 is used to position the clamping cylinder 82 and prevent the clamping cylinder 82 from rotating or moving. The side plate 54 is used to protect the drive cylinder 71 and other parts.

[0025] The guide mechanism 6 guides the movement of the base frame 51 and further fixes the linearly moving base 5 to improve its stability. The slider 62 fixed on the support frame 2 is slidably connected to the slide rod 61 fixed on the base frame 51, which can form a vertical sliding constraint to ensure that the linearly moving base 5 moves along a fixed trajectory under the drive of the pneumatic cylinder 4, avoiding processing deviations caused by lateral offset.

[0026] The entire dimensional control component 7 and sensing component 3 form a complete and reliable closed-loop control chain, from "physical dimensional change" to "mechanical displacement" and then to "electrical signal feedback." The precise design of each link ensures the accuracy and reliability of the final automated control. The drive cylinder 71 serves as the drive source for the mounting bracket 72. The clamping holes 73 on the mounting bracket 72 allow users to secure the dial indicator 74 and adapter component 75 using bolts. The high-precision dial indicator 74 serves as the mechanical measurement reference, ensuring the physical accuracy of the measurement. The three-point centering clamping design of the adapter component 75 ensures the dial indicator 74 is installed securely, without shaking or eccentricity, providing a solid structural guarantee for high-precision measurement. The adapter cylinder 751 is locked inside the clamping holes 73. When changing the dial indicator 74, the user rotates the three threaded rods 753 connected by the threads inside the three nut holes 752 to adjust the three fixing heads 754 and fix different dial indicators 74.

[0027] The grinding fixture assembly 8 is used to fix the lens. The ejector pin 81 is used to hold the lens inside the positioning clamp 82. The clamp 82 is fixedly installed inside the clamp block 53 so that it can move with the clamp block 53. After the threaded hole 83 is connected to the external air pipe, the air pipe can inject air or draw a vacuum into the clamp 82 through the threaded hole 83, thereby fixing the lens.

[0028] The first stage involves equipment preparation and workpiece clamping. Mechanism installation and calibration: First, the entire dimensional control mechanism is securely installed onto the predetermined position on the automated grinding machine via its bottom mounting plate 1. Ensure the mounting reference plane of the support frame 2 is parallel to the machine tool's coordinate axes to guarantee the accuracy of subsequent movements. Measuring component configuration: Based on the accuracy requirements of the workpiece being processed, a dial indicator 74 with a suitable range and accuracy is selected. The operator places the dial indicator 74 into the adapter sleeve 751 of the adapter assembly 75. Then, by rotating the three threaded rods 753, the three fixed heads 754 are driven to retract towards the center until the dial indicator 74's rod portion is securely clamped. This design ensures quick replacement and stable installation of the dial indicator 74. Workpiece installation: The workpiece to be ground is placed in the clamp 82 of the grinding fixture assembly 8. The workpiece is supported by the clamp 82, and its top is centered by the ejector pin 81. Subsequently, compressed air or vacuum is introduced into the clamping cylinder 82 through the threaded hole 83, and the workpiece is firmly clamped by pneumatic principle in preparation for grinding.

[0029] The second stage involves rough feed and positioning. Grinding begins: the grinding machine spindle drives the grinding wheel to rotate at high speed. Rapid overall feed: the machine tool control system issues a command, and the pneumatic cylinder 4, mounted on the outer end of the support frame 2, begins operation. Its extension rod extends, pushing the connected linear motion base 5 downwards. Smooth guiding motion: during the downward movement of the linear motion base 5, the slider 62 of the guide mechanism 6 slides smoothly along the slide rod 61 inside the support frame 2. This rigid guidance ensures that the entire linear motion base 5, along with the workpiece it carries and the dimensional control components 7, descends linearly without wobbling or deviation, quickly delivering the workpiece to the machining preparation position close to the grinding wheel.

[0030] The third stage involves precision grinding and online real-time dimensional control. Measurement trigger force application: When the workpiece moves to the machining area, the drive cylinder 71 inside the dimensional control component 7 is activated. Its drive rod pushes the mounting bracket 72 downwards, causing the grinding fixture assembly 8 at the bottom of the mounting bracket 72, along with the workpiece, to continue approaching the grinding wheel with a small, precise displacement. Simultaneously, the measuring tip of the dial indicator 74 at the top establishes a stable fixed-point contact with the sensing end of the sensor 32 of the sensing component 3. Closed-loop controlled grinding: The grinding wheel begins grinding the workpiece. As the workpiece material is ground, its diameter continuously decreases. This minute dimensional change is transmitted through the ejector pin 81 and the mounting bracket 72, causing an extremely small retraction displacement of the measuring rod of the dial indicator 74. Signal feedback and processing: The displacement of the dial indicator 74 tip is captured in real-time, non-contactly by the sensor 32 directly above. The sensor 32 converts this physical position change into a precise electrical signal and immediately transmits it to the machine tool's central controller, such as a PLC or CNC system. Automatic judgment and stop: The controller continuously compares the received real-time signal with the preset target machining dimension value. When the signal value reaches the threshold corresponding to the target dimension, the controller immediately issues a command to stop the grinding wheel from feeding or to quickly retract it, thereby completing the precision grinding of the workpiece. The entire process requires no manual measurement, realizing simultaneous processing and inspection.

[0031] The fourth stage involves resetting and unloading the workpiece. Mechanism resetting: After grinding, the drive cylinder 71 retracts first, disengaging the dial indicator 74 from the sensor 32 to prevent interference during the return stroke. Subsequently, the telescopic rod of the main pneumatic cylinder 4 retracts, causing the entire linear moving base 5 to smoothly rise along the guide mechanism 6, returning to its initial waiting position. Workpiece unloading: The air pressure inside the clamp 82 is released, allowing the operator or robot to easily remove the finished workpiece and prepare for loading the next workpiece, thus beginning the next work cycle.

[0032] It should be noted that the specific models and specifications of the sensor 32, dial indicator 74, pneumatic cylinder 4, and drive cylinder 71 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail.

[0033] The power supply and principle of sensor 32 are clear to those skilled in the art and will not be described in detail here.

[0034] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A control mechanism for an automatic swing-up machine, comprising a fixed plate (1) and a support frame (2) bolted to the top of the fixed plate (1), characterized in that: The support frame (2) is bolted with a sensing component (3) on its side wall, and a pneumatic cylinder (4) is installed on its outer end surface. A linear moving base (5) is provided on its inner end surface. A guide mechanism (6) is assembled between the linear moving base (5) and the support frame (2), and its tail end is fixedly connected to the telescopic end of the pneumatic cylinder (4). A dimensional control component (7) is installed inside the linear moving base (5). A grinding fixture assembly (8) is installed at the bottom of the dimensional control component (7). The grinding fixture assembly (8) is installed at the bottom of the linear moving base (5).

2. The automatic dimensional control mechanism for an upper swing machine according to claim 1, characterized in that, The sensing component (3) consists of a side frame (31) and a sensor (32). One end of the side frame (31) is bolted to the side wall of the support frame (2), and the other end is equipped with the sensor (32). The sensing end of the sensor (32) faces upward and makes fixed contact with the tip of the dimensional control component (7).

3. The automatic dimensional control mechanism for an upper swing machine according to claim 2, characterized in that, The linear moving base (5) consists of a base frame (51), a top block (52), a clamping block (53), and two side plates (54). The outer end of the base frame (51) matches the inner end of the bearing frame (2) and is equipped with the guide mechanism (6). The top block (52) is bolted to the top of the base frame (51) and its tail end is fixedly connected to the telescopic end of the pneumatic cylinder (4). The clamping block (53) is bolted to the inner end of the base frame (51). The two side plates (54) are respectively fixedly installed on both sides of the top block (52) and the clamping block (53).

4. The automatic dimensional control mechanism for an upper swing machine according to claim 3, characterized in that, The guide mechanism (6) consists of a slide rod (61) and a slider (62). The slide rod (61) is vertically fixed inside the base frame (51), and the slider (62) is bolted to the groove on the inner end face of the bearing frame (2) and is slidably connected to the outer wall of the slide rod (61).

5. The automatic dimensional control mechanism for an upper swing machine according to claim 4, characterized in that, The dimensional control component (7) consists of a drive cylinder (71), a mounting bracket (72), a clamping hole (73), a dial indicator (74), and an adapter component (75). The fixed end of the drive cylinder (71) is fixed to the bottom of the top block (52) with bolts, and the drive end is fixedly connected to the mounting bracket (72). The top of the mounting bracket (72) is provided with the clamping hole (73), and the grinding fixture assembly (8) is installed at the inner bottom end. The adapter component (75) is installed inside the clamping hole (73), and the dial indicator (74) is equipped inside the adapter component (75). The tip of the dial indicator (74) is in fixed contact with the sensing end of the sensor (32).

6. The automatic dimensional control mechanism for an upper swing machine according to claim 5, characterized in that, The adapter assembly (75) consists of an adapter cylinder (751), three nut holes (752), three threaded rods (753), and three fixing heads (754). The adapter cylinder (751) is installed inside the clamping hole (73), and the outer wall is provided with three nut holes (752) at equal intervals. The outer walls of the three threaded rods (753) are respectively threaded to the inner rings of the three nut holes (752), and the opposite ends are respectively axially connected to the three fixing heads (754). The opposite ends of the three fixing heads (754) are fastened to the outer wall of the dial indicator (74).

7. The automatic dimensional control mechanism for an upper swing machine according to claim 6, characterized in that, The grinding fixture assembly (8) consists of a pin (81), a clamp (82), and a threaded hole (83). The top of the pin (81) is fixedly connected to the mounting bracket (72), and the tip extends into the inside of the clamp (82). The clamp (82) is installed inside the clamp block (53), and the threaded hole (83) is provided on the side wall. The threaded hole (83) is threadedly connected to an external air pipe.

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