A one-time clamping device for processing inner and outer wall surfaces of a spectacle frame

Abstract

A clamping device for processing the inner and outer walls of a mirror frame includes a sheet metal with a processing surface and a mounting surface. The clamping device includes a base, a clamping component, a vacuum pump, a piston rod, and a drive cylinder. An outer washer is provided on the base corresponding to the outline of the mirror frame. An inner washer and a vent hole are provided inside the outer washer. The mounting surface of the sheet metal is in contact with the outer and inner washers. The vacuum pump is connected to the vent hole and clamps the sheet metal. The clamping component includes a clamping end face that fits against the processing surface of the sheet metal and a processing groove corresponding to the outline of the outer washer. Both ends of the clamping component are fixedly connected to the piston rod. The drive cylinder is hinged to the base and works in conjunction with the piston rod to drive the clamping component closer to or away from the sheet metal. This device is flexible in use; the clamping component can be quickly disassembled, facilitating loading and unloading. When the inner washer holds the inner waste material, it does not obstruct the path, and the inner waste material will not fly away after processing. The inner waste material can be removed by stopping the vacuum pump.

Description

Technical Field

[0001] This invention relates to the field of eyeglass processing equipment technology, specifically to a single-clamping device for processing the inner and outer walls of eyeglass frames. Background Technology

[0002] Eyeglass frames are made from a variety of materials and using various molding processes. Acetate eyeglasses, for example, require the frame shape to be cut from a single piece of acetate. (See attached image.) Figure 1 As shown, the traditional process requires first cutting along the outer contour of the frame on the sheet material to remove the outer waste material, and then cutting the inner material along the inner contour of the frame to form the frame.

[0003] The problem lies in how to clamp the sheet metal. If it is clamped first on the outer ring, the outer ring scrap will separate from the inner ring during the first machining, and the clamping will lose its connection, requiring the sheet metal to be re-clamped. Clamping it first on the inner ring or frame does not affect the machining of the outer ring, but when it comes to machining the inner ring, it will obstruct the machining path, causing the fixture and tool to collide.

[0004] This means that after the first processing, a second clamping is required to move the fixture to a position that does not affect the processing of the inner ring, and then process the inner ring a second time to complete the frame forming.

[0005] Re-clamping causes a shift in the product's coordinate position, requiring operators to re-establish the machine tool coordinate system in order to achieve precise dimensions. This results in low processing efficiency, with a significant amount of time wasted on re-clamping and coordinate system establishment.

[0006] Moreover, because the sheet material is thin and light, and a large amount of waste needs to be removed, the frame must be completely fixed to prevent it from jumping and hitting the cutting head during processing, which would leave marks and produce waste.

[0007] Furthermore, due to the diverse shapes of eyeglass frames nowadays, which are no longer simply flat frames, traditional clips are also difficult to adapt to curved frames.

[0008] In addition, most machining is now done using CNC equipment, such as milling machines, where the cutter head travels above the sheet metal. How to integrate the clamping device with the CNC equipment is also a problem. Summary of the Invention

[0009] To address the shortcomings of the aforementioned technologies, this invention provides a primary clamping device for processing the inner and outer walls of a mirror frame. The technical solution of this invention is as follows: A primary clamping device for processing the inner and outer walls of a mirror frame includes a sheet material with a processing surface and a mounting surface. The clamping device includes a base, a clamping component, a vacuum pump, a piston rod, and a driving cylinder. An outer washer is provided on the base corresponding to the outline of the mirror frame. An inner washer and a vent hole are provided inside the outer washer. The mounting surface of the sheet material is in contact with the outer and inner washers. The vacuum pump is connected to the vent hole and clamps the sheet material. The clamping component includes a clamping end face that fits against the processing surface of the sheet material and a processing groove corresponding to the outline of the outer washer. Both ends of the clamping component are fixedly connected to the piston rod. The driving cylinder is hinged to the base and engages with the piston rod to drive the clamping component closer to or away from the sheet material.

[0010] Using the above technical solution, when using this device, the clamping parts are first rotated and moved away using the hinge structure of the drive cylinder. Then, the sheet material to be processed is placed on the outer and inner washers, and the vacuum machine is started. The vent is set at the position of the inner washer, and after the inner washer and the sheet material are attached, a closed cavity is formed. After vacuuming, the sheet material is simply sucked onto the inner and outer washers, thus completing the fixation.

[0011] The first processing then begins, removing waste material from the outer edge along the contour of the frame to form the outer wall's dimensions and shape. At this stage, the device does not require removing the sheet material or moving the coordinates.

[0012] Instead, the clamping element is connected around the hinge of the drive cylinder, which rotates the clamping element back to the end face of the outer and inner washers. Through the contraction of the drive cylinder and piston rod, the clamping end face of the clamping element is driven to move toward the machined end face of the plate until it comes into contact and clamps.

[0013] In this way, the clamping end face facilitates the outer washer to hold the pillar frame on both sides. During the second processing to remove the inner ring waste, the frame will neither move or detach, nor shift or lift. This achieves the goal of completing the processing of the inner and outer walls of the frame in a single clamping operation.

[0014] This device is flexible in use, and the clamping parts can be quickly disassembled for easy loading and unloading. The inner gasket is located inside the outer gasket, and the vent is located inside the inner gasket. This ensures that the waste material in the inner ring is not obstructed when it is being held in place, and the waste material in the inner ring will not fly away after processing. The waste material in the inner ring can be removed by stopping the vacuum pump.

[0015] The clamping slots allow the cutting tool to penetrate and move, maintaining the frame while not obstructing the machining path.

[0016] A further feature of the present invention is that the outer washer, the inner washer, and the clamping end face are arc-shaped.

[0017] By adopting the above technical solution, the outer washer, inner washer, and clamping end face can be set into an arc shape that matches the curvature of the sheet material, thus enabling the processing of curved mirror frames.

[0018] A further feature of the present invention is that the clamping device further includes a Y-axis swing mechanism, which includes a frame, a Y-axis rotating shaft, and a motor. The frame has a shaft hole, and the Y-axis is fixedly connected to the base and passes through the shaft hole, and is linked with the motor. The motor is fixedly connected to the frame and drives the base to rotate around the Y-axis.

[0019] A further feature of the present invention is that the clamping device further includes an X-axis swing mechanism, which includes a support base, an X-axis rotating shaft, and a motor. The support base has a shaft hole, and the X-axis rotating shaft is fixedly connected to the frame base and passes through the shaft hole, and is linked with the motor. The motor is fixedly connected to the frame base and drives the base to rotate around the X-axis.

[0020] Using the above technical solution, conventional planar fixtures and planar milling machines cannot process curved mirror frames, and purchasing multi-axis machining centers is expensive. This invention achieves the rotation of the sheet material being processed by setting and linking the Y-axis swing mechanism and the X-axis swing mechanism, so that it can be installed on ordinary machine tools to simulate a multi-axis machining center and complete the processing of curved mirror frames.

[0021] A further feature of the present invention is that the profile of the machining groove is larger than the inner side surface of the outer washer and smaller than the outer side surface of the outer washer, and the machining groove is provided with a draft taper.

[0022] Using the above technical solution, if the angle of the inner wall surface of the machining channel is too small when the Y-axis and X-axis rocking mechanisms rotate, it will collide with the cutting tool. However, by setting the draft angle, the opening diameter of the machining channel is increased, which does not affect the diameter of contact with the outer washer, thus avoiding this situation. The size setting can prevent the machining channel from colliding when machining the inner wall surface.

[0023] A further feature of the present invention is that the inner washer, the outer washer, and the clamping end face are provided with a pad layer.

[0024] By employing the above technical solutions and setting various padding layers, it is possible to assist in clamping sheets of different materials to meet specific requirements. For example, rubber buffer padding layers can prevent clamping scratches. Attached Figure Description

[0025] Figure 1 This is a diagram illustrating the conventional processing steps of the present invention;

[0026] Figure 2 The structure of this embodiment of the invention Figure 1 ;

[0027] Figure 3 The structure of this embodiment of the invention Figure 2 ;

[0028] Figure 4 The structure of this embodiment of the invention Figure 3 ;

[0029] Figure 5 The structure of this embodiment of the invention Figure 4 ;

[0030] Figure 6 The structure of this embodiment of the invention Figure 5 ;

[0031] Figure 7 This is a cross-sectional view of an embodiment of the present invention. Detailed Implementation

[0032] like Figure 1-7 As shown, a clamping device for processing the inner and outer walls of a mirror frame includes a plate 1, which includes a processing surface 11 and a mounting surface 12. The clamping device includes a base 2, a clamping member 3, a vacuum pump, a piston rod 41, and a driving cylinder 42. An outer washer 21 is provided on the base 2 corresponding to the outline of the mirror frame. An inner washer 22 and a vent hole 23 are provided inside the outer washer 21. The mounting surface 12 of the plate 1 is in contact with the outer washer 21 and the inner washer 22. The vacuum pump is connected to the vent hole 23 and clamps the plate 1. The clamping member 3 includes a clamping end face 31 that is in contact with the processing surface 11 of the plate 1 and a processing through groove 32 that corresponds to the outline of the outer washer 21. Both ends of the clamping member 3 are fixedly connected to the piston rod 41. The driving cylinder 42 is hinged to the base 2 and works in conjunction with the piston rod 41 to drive the clamping member 3 to move closer to or away from the plate 1.

[0033] When using this device, firstly, the clamping member 3 is rotated and moved away using the hinge structure of the drive cylinder 42. Then, the plate 1 to be processed is placed on the outer washer 21 and the inner washer 22. The vacuum machine is started, and the vent 23 is set at the position of the inner washer 22. After the inner washer 22 is attached to the plate 1, a closed cavity is formed. After vacuuming, the plate 1 is simply sucked onto the inner washer 22 and the outer washer 21, thus completing the fixation.

[0034] The first processing then begins, removing the outer waste material along the outline of the outer wall of the frame to form the outer wall's dimensions and shape. At this point, the device does not require removing plate 1 or moving the coordinate position.

[0035] Instead, the clamping member 3 is rotated back to the end faces of the outer washer 21 and the inner washer 22 by the hinge connection around the drive cylinder 42. Through the contraction of the drive cylinder 42 and the piston rod 41, the clamping end face 31 of the clamping member 3 is driven to move toward the processing end face of the plate 1 until it comes into contact and clamps.

[0036] In this way, the clamping end face 31 facilitates the outer washer 21 to hold the pillar frame on both sides. During the second processing to remove the inner ring waste, the frame will neither move or detach, nor shift or lift. This achieves the goal of completing the processing of the inner and outer walls of the frame in one clamping operation.

[0037] This device is flexible in use; the clamping element 3 can be quickly disassembled for easy loading and unloading. The inner washer 22 is located inside the outer washer 21, and the vent 23 is located inside the inner washer 22. When adsorbing the waste material in the inner ring, it will not obstruct the path, and the waste material in the inner ring will not fly away after processing. The waste material in the inner ring can be removed by stopping the vacuum pump.

[0038] The clamping part 3 has a machining groove 32, which allows the tool to penetrate and move, keeping the frame part clamped without affecting the machining path.

[0039] The outer washer 21, the inner washer 22, and the clamping end face 31 are arc-shaped.

[0040] By setting the outer washer 21, inner washer 22, and clamping end face 31 into an arc shape that matches the curvature of the plate 1, the processing of the arc-shaped mirror frame can be clamped.

[0041] The clamping device also includes a Y-axis swing mechanism 5, which includes a frame 51, a Y-axis rotating shaft 52 and a motor 53. The frame 51 is provided with a shaft hole. The Y-axis rotating shaft 52 is fixedly connected to the base 2 and passes through the shaft hole, and is linked with the motor 53. The motor 53 is fixedly connected to the frame 51 and drives the base 2 to rotate around the Y-axis rotating shaft 52.

[0042] The clamping device also includes an X-axis swing mechanism 6, which includes a support base 61, an X-axis rotating shaft 62 and a motor 53. The support base 61 is provided with a shaft hole. The X-axis rotating shaft 62 is fixedly connected to the frame base 51 and passes through the shaft hole, and is linked with the motor 53. The motor 53 is fixedly connected to the frame base 51 and drives the base 2 to rotate around the X-axis rotating shaft 62.

[0043] When machining curved mirror frames, conventional planar fixtures and planar milling machines cannot perform the machining, and purchasing multi-axis machining centers is expensive. This invention achieves the rotation of the workpiece 1 by setting and linking the Y-axis swing mechanism 5 and the X-axis swing mechanism 6, so that it can be installed on ordinary machine tools to simulate a multi-axis machining center and complete the machining of curved mirror frames.

[0044] The profile of the machining groove 32 is larger than the inner side of the outer washer 21 and smaller than the outer side of the outer washer 21. The machining groove 32 is provided with a draft taper.

[0045] When the Y-axis rocking mechanism 5 and the X-axis rocking mechanism 6 rotate, if the angle of the inner wall surface of the machining groove 32 is too small, it will collide with the cutting tool. However, by setting the draft angle, the opening diameter of the machining groove 32 is increased, which does not affect the diameter of the contact with the outer washer 21, thus avoiding this situation. The size setting can prevent the machining groove 32 from colliding when machining the inner wall surface.

[0046] The inner washer 22, the outer washer 21, and the clamping end face 31 are provided with padding layers.

[0047] Various types of padding layers can be installed to assist in clamping different types of sheets to meet specific requirements. For example, rubber buffer padding layers can prevent clamping scratches and increase the airtightness of inner gaskets.

Claims

1. A clamping device for processing the inner and outer walls of a mirror frame, comprising a plate, the plate having a processing surface and a mounting surface, characterized in that: The clamping device includes a base, a clamping component, a vacuum pump, a piston rod, and a drive cylinder. An outer washer is provided on the base corresponding to the outline of the mirror frame. An inner washer and a vent hole are provided inside the outer washer. The mounting surface of the sheet metal is in contact with the outer and inner washers. The vacuum pump is connected to the vent hole and clamps the sheet metal. The clamping component includes a clamping end face that fits against the machined surface of the sheet metal and a machined groove corresponding to the outline of the outer washer. Both ends of the clamping component are fixedly connected to the piston rod. The drive cylinder is hinged to the base and works in conjunction with the piston rod to drive the clamping component closer to or away from the sheet metal. The outer washer, inner washer, and clamping end face are arc-shaped. The inner washer is airtightly fitted to the mounting surface of the sheet metal. The outline of the machined groove is larger than the inner side of the outer washer but smaller than the outer side of the outer washer, and the machined groove has a draft taper.

2. The clamping device for processing the inner and outer walls of a mirror frame according to claim 1, characterized in that: The clamping device also includes a Y-axis swing mechanism, which includes a frame, a Y-axis, and a motor. The frame has a shaft hole, and the Y-axis is fixedly connected to the base and passes through the shaft hole, and is linked with the motor. The motor is fixedly connected to the frame and drives the base to rotate around the Y-axis.

3. The one-time clamping device for processing the inner and outer walls of a mirror frame according to claim 2, characterized in that: The clamping device also includes an X-axis swing mechanism, which includes a support base, an X-axis rotating shaft and a motor. The support base has a shaft hole, and the X-axis rotating shaft is fixedly connected to the frame base and passes through the shaft hole. It is linked with the motor, which is fixedly connected to the frame base and drives the base to rotate around the X-axis.

4. The clamping device for processing the inner and outer walls of a mirror frame according to claim 3, characterized in that: The inner washer, outer washer, and clamping end face are provided with padding.

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