Mirror frame feeding equipment

Abstract

The application relates to a mirror frame feeding equipment. A combined space motion track combined by translation and rotation is executed by controlling an expansion clamp, gradual adjustment from inclination to parallelism is realized, flexible guiding type feeding of a mirror frame blank is realized, hard collision, jamming and damage caused by workpiece size deviation are avoided, and the success rate and stability of feeding are effectively improved.

Description

Technical Field

[0001] This application relates to the field of CNC machining technology, and in particular to a picture frame feeding device. Background Technology

[0002] In existing technologies, eyeglass frames, as a product that combines functionality and aesthetics, typically require high precision, complex contour machining, and excellent surface quality in their manufacturing. To achieve mass production, the industry generally uses CNC machining centers to automate multiple processes on the frame blanks, such as grooving, drilling, and contour milling.

[0003] In existing automated solutions for mirror frame manufacturing, a loading mechanism (such as a robotic arm or pneumatic device) typically picks up the mirror frame blank and places it into a fixture at the machining station. Then, a CNC system controls the machining spindle (tool) to move and cut relative to the fixed mirror frame blank at high speed. However, traditional loading methods are mostly rigid connections, that is, the mirror frame blank is "pushed" or "sleeved" into the fixture along a fixed linear trajectory using actuators such as cylinders. This "rigid loading" method has extremely stringent requirements on the dimensional tolerances of the incoming mirror frame blank. Even a slight deformation or deviation can easily lead to loading failure, jamming, or even damage and scratches to the delicate structure or surface of the mirror frame blank. Utility Model Content

[0004] To address the aforementioned issues, this application provides a method and apparatus for loading eyeglass frames that minimizes damage to the frames and ensures accurate loading positions.

[0005] To achieve the above objectives, in a first aspect, embodiments of this application provide a method for feeding picture frames, comprising the following steps: Provide a frame blank that is held stationary at a preset loading position by a fixing clamp; Control a clamping clamp to perform at least one continuous translational and rotational motion from a preset starting posture, so that the clamping clamp is tilted at a preset angle relative to the frame blank, and the top side of the clamping clamp enters the inner frame of the frame blank first; Continue to control the movement of the expansion clamp, gradually adjusting its posture from an inclined state to a state parallel to the frame blank, while the expansion clamp fully enters the inner frame of the frame blank; After the expansion clamp expands the inner contour of the inner frame of the frame blank, the fixing clamp releases the frame blank.

[0006] Preferably, the preset feeding position is configured such that the frame blank is held in a horizontal plane by the fixing clamp.

[0007] Preferably, the preset starting posture of the tensioning clamp is an inclined posture.

[0008] Preferably, before the expansion clamp performs continuous translational and rotational movements, a chip removal step is further included: applying airflow to the outer surface of the expansion clamp.

[0009] Secondly, embodiments of this application provide a picture frame feeding device, applied to the feeding method described in any embodiment of the first aspect, the device comprising: A fixing fixture is configured to clamp and hold a frame blank stationary at a preset loading position; An expansion clamp is configured to support and expand the frame blank; A multi-axis motion mechanism, connected to the expansion clamp, is configured to drive the expansion clamp to perform a continuous translational and rotational motion; The controller is electrically connected to the fixed clamp, the tightening clamp, and the multi-axis motion mechanism; The controller is configured to control the multi-axis motion mechanism to drive the tensioning clamp to move in a continuous arc trajectory for feeding.

[0010] Preferably, the expansion clamp includes at least two retractable clamping blocks, which extend to abut against the inner contour of the inner frame of the frame blank and apply a preset clamping force to achieve expansion clamping of the frame blank.

[0011] Preferably, the fixing clamp includes a jaw and a base configured to translate and rotate, the jaw being disposed on the base for clamping the frame blank from the outer edge of the frame blank.

[0012] Preferably, the expansion clamp is mounted on the free end of a multi-axis manipulator.

[0013] Preferably, the tightening clamp is mounted on a multi-axis motion mechanism, which includes: The X-axis translation mechanism is used to drive the expansion clamp to move along the first horizontal direction; The Y-axis translation mechanism is used to drive the expansion clamp to move along the second horizontal direction; Z-axis translation mechanism, used to drive the expansion clamp to move vertically; and At least one rotating mechanism is provided for driving the expansion clamp to rotate about at least one horizontal axis.

[0014] The frame loading method and equipment designed in this application achieve flexible guided loading of the frame blank by controlling the expansion clamp to execute a composite spatial motion trajectory that combines translation and rotation, and gradually adjusts from tilt to parallel. This avoids hard collisions, jamming and damage caused by workpiece size deviations, and effectively improves the success rate and stability of loading. Attached Figure Description

[0015] Figure 1 This is a flowchart of the frame loading method provided in the embodiments of this application.

[0016] Figure 2 This is a schematic diagram of the frame feeding device provided in the embodiments of this application.

[0017] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0018] Figure 4 This is a schematic diagram of the tensioning clamp provided in the embodiment of this application in a preset initial tilt posture.

[0019] Figure 5 This is a schematic diagram of the planar structure of the frame feeding device provided in the embodiments of this application.

[0020] Figure 6 This is a schematic diagram showing the disassembled operation of the frame loading process provided in the embodiments of this application.

[0021] The components include: a feeding device 100, a processing device 200, a spindle unit 201, a fixing fixture 10, a base 11, a gripper 12, a frame blank 20, an inner frame 21, a tensioning fixture 30, a clamping block 31, and a multi-axis motion mechanism 40. Detailed Implementation

[0022] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0023] See Figures 1 to 6 As shown, this application provides a method for feeding picture frames, and a picture frame feeding device 100 using this method. Figure 1 , Figure 2 As shown, the frame loading method and frame loading equipment 100 provided in this application embodiment achieve flexible guided loading of the frame blank 20 by controlling the expansion clamp 30 to execute a composite spatial motion trajectory that combines translation and rotation and gradually adjusts from tilt to parallel. This avoids hard collisions, jamming and damage caused by deviations in the size of the frame blank workpiece, and effectively improves the success rate and stability of loading.

[0024] Specifically, such as Figure 2 , Figure 5As shown, the frame loading device 100 can be integrated into a frame processing device 200. The processing device 200 also includes a fixed spindle unit 201, which is used to perform cutting processing on the frame blank 20. In this embodiment, the loading device 100 is used to accurately and stably load the frame blank 20 from the upstream process to the processing station, and then cooperate with the spindle unit to complete the processing of the inner frame, outer frame outline, and other parts of the frame blank 20.

[0025] Next, the specific structural features of the frame feeding device 100 in the embodiments of this application will be described in detail.

[0026] like Figure 2 , Figure 3 As shown, the frame loading device provided in this embodiment mainly includes a fixing clamp 10, a tightening clamp 30, a multi-axis motion mechanism 40, and a controller (not shown). In this embodiment, the controller can be an industrial PLC or an embedded system, which is electrically connected to the fixing clamp 10, the tightening clamp 30, and the multi-axis motion mechanism 40, and internally stores a control program for executing the frame loading method of this application, and coordinates the actions of each component. That is, the controller is configured to control the multi-axis motion mechanism 40 to drive the tightening clamp 30 to move in a continuous arc trajectory for loading. In this embodiment, preferably, the multi-axis motion mechanism 40 can be a multi-axis robot.

[0027] Specifically, such as Figure 3 As shown, the fixing clamp 10 is configured to clamp and hold a frame blank 20 stationary at a preset loading position. In a preferred embodiment, the fixing clamp 10 includes a jaw 12 and a base 11 configured to translate and rotate. The jaw 12 is disposed on the base 11 and is used to clamp the frame blank 20 from its outer edge. In specific implementations, the inner side of the jaw 12 may be provided with an elastic pad made of rubber or polyurethane, so as to ensure clamping force while avoiding scratches on the surface of the frame blank 20 when clamping its outer edge. The jaw 12 is driven by a cylinder or motor and controlled by a controller to realize the opening and closing actions.

[0028] like Figure 3 As shown, the expansion clamp 30 is configured to support and expand the frame blank 20. In a preferred embodiment, the expansion clamp 30 includes at least two retractable clamping blocks 31, which extend to abut against the inner contour of the inner frame 21 of the frame blank 20 and apply a preset clamping force, thereby expanding the frame blank 20. In specific implementations, the clamping blocks 31 can be driven by an internal pneumatic or hydraulic actuator. After receiving the frame blank 20, they extend outward to abut against and uniformly apply a clamping force to the inner contour of the frame blank 20 from the inside, thereby achieving secure positioning.

[0029] like Figure 2 , Figure 3 As shown, the multi-axis motion mechanism 40 is connected to the expansion clamp 30 and is configured to drive the expansion clamp 30 to perform a continuous translational and rotational motion. In a specific implementation, the multi-axis motion mechanism 40 and the expansion clamp 30 it carries can be used as a complete workpiece motion unit, suspended as a whole below the spindle unit 201 of the processing equipment 200. Its multi-axis motion capability is utilized in conjunction with the cutter head of the spindle unit 201 to complete the machining of the inner frame, outer frame contour lines, and other parts of the mirror frame blank 20.

[0030] In this embodiment, the controller is configured to perform the frame loading method described below.

[0031] like Figure 1 As shown, the method for loading the picture frame specifically includes the following steps: First, a frame blank 20 is provided and held stationary at a preset loading position by a fixing clamp 10. In a preferred embodiment, as... Figure 3 , Figure 5 As shown, the preset feeding position is configured such that the frame blank 20 is held in a horizontal plane by the fixing clamp 10.

[0032] Next, a tensioning clamp 30 is controlled to perform at least one continuous translational and rotational motion, starting from a preset initial posture. In one specific embodiment, such as Figure 4 As shown, the preset starting posture of the expansion clamp 30 is an inclined posture, for example, the supporting plane forms an angle of 5 degrees to 30 degrees with the horizontal plane. In this way, the machining chips attached to the expansion clamp 30 can automatically fall off under the action of gravity.

[0033] Specifically, see Figure 6 As shown, the specific continuous feeding motion includes: Approaching phase: The controller controls multiple motion axes of the multi-axis motion mechanism 40 to adjust the tension clamp 30 to a position with a preset tilt angle relative to the frame blank 20, and the top side of the tension clamp 30, that is, the part with a higher vertical position when the tension clamp 30 is tilted, enters the inner frame 21 of the frame blank 20 first.

[0034] Positioning stage: The controller continues to control the multi-axis motion mechanism 40, so that the translation and rotation of the tensioning clamp 30 are carried out continuously and smoothly, and its posture is gradually adjusted from the tilted state to the state parallel to the frame blank 20, until the tensioning clamp 30 is completely inserted into the inner frame 21 of the frame blank 20.

[0035] Finally, please refer to [the relevant section]. Figure 6After the expansion clamp 30 expands the inner contour of the inner frame 21 of the frame blank 20, the fixing clamp 10 releases the frame blank 20, thereby completing the entire loading and handover process. After loading is completed, the controller can continue to control the expansion clamp 30 to rotate to a preset processing start angle and drive the frame blank 20 to move within the working range of the spindle unit to start executing the processing program.

[0036] In some embodiments, before the expansion clamp 30 performs continuous translational and rotational movements, a chip removal step is included: airflow is applied to the outer surface of the expansion clamp 30. This airflow actively removes any small chips and dust residue that may have adhered to the expansion clamp 30 from the previous machining cycle, preventing secondary contamination or scratches on the surface of the frame blank 20, and ensuring that the positioning reference surface of the expansion clamp 30 remains clean at all times, thus providing a reliable guarantee for continuous, stable, and high-precision clamping and machining. Specifically, an additional air nozzle (not shown) can be provided on or near the multi-axis motion mechanism 40. The nozzle's nozzle is designed to face the working surface of the expansion clamp 30, such as its support surface or the retractable clamping block 31 portion.

[0037] In some embodiments, the multi-axis motion mechanism 40 includes an X-axis translation mechanism, a Y-axis translation mechanism, a Z-axis translation mechanism, and at least one rotation mechanism. The X-axis translation mechanism drives the clamping fixture 30 to move along a first horizontal direction; the Y-axis translation mechanism drives the clamping fixture 30 to move along a second horizontal direction; the Z-axis translation mechanism drives the clamping fixture 30 to move along a vertical direction; and the rotation mechanism drives the clamping fixture 30 to rotate about at least one horizontal axis. These mechanisms cooperate with each other and are coordinated by a controller to drive the clamping fixture 30 to achieve high-precision positioning and attitude adjustment. In this embodiment, the translational and rotational speeds of the clamping fixture 30 are variable.

[0038] The frame loading method and equipment provided in this application embodiment control the expansion clamp to execute a composite spatial motion trajectory that combines translation and rotation, gradually adjusting from tilt to parallel. This achieves flexible guided loading of the frame blank, avoiding hard collisions, jamming and damage caused by workpiece size deviations, and effectively improving the success rate and stability of loading.

[0039] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A frame feeding device, characterized in that, The device includes: A fixing fixture is configured to clamp and hold a frame blank stationary at a preset loading position; An expansion clamp is configured to support and expand the frame blank; A multi-axis motion mechanism, connected to the expansion clamp, is configured to drive the expansion clamp to perform a continuous translational and rotational motion; The controller is electrically connected to the fixed clamp, the tightening clamp, and the multi-axis motion mechanism; The controller is configured to control the multi-axis motion mechanism to drive the tensioning clamp to move in a continuous arc trajectory for feeding.

2. The frame feeding device according to claim 1, characterized in that, The expansion clamp includes at least two retractable clamping blocks that extend to abut against the inner contour of the inner frame of the frame blank and apply a preset clamping force, thereby expanding the frame blank with the expansion clamp.

3. The frame feeding device according to claim 1, characterized in that, The fixing clamp includes a jaw and a base configured to translate and rotate, the jaw being disposed on the base for clamping the frame blank from the outer edge of the frame blank.

4. The frame feeding device according to claim 1, characterized in that, The expansion clamp is mounted on the free end of a multi-axis manipulator.

5. The frame feeding device according to claim 1, characterized in that, The tightening clamp is mounted on a multi-axis motion mechanism, which includes: The X-axis translation mechanism is used to drive the expansion clamp to move along the first horizontal direction; The Y-axis translation mechanism is used to drive the expansion clamp to move along the second horizontal direction; Z-axis translation mechanism, used to drive the expansion clamp to move vertically; and At least one rotating mechanism is provided for driving the expansion clamp to rotate about at least one horizontal axis.

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