Centrifugal clamping mechanism of automatic optical edge grinding machine

Abstract

The utility model discloses a centrifugal clamping mechanism of an automatic optical edge grinding machine, which comprises a lathe head, a left workpiece shaft, a right workpiece shaft, a left chuck and a right chuck, the left workpiece shaft and the right workpiece shaft are symmetrically arranged, the left chuck and the right chuck are respectively arranged at two shaft ends, and the left workpiece shaft is fixed at the left end of the lathe head and can only rotate. The right workpiece shaft is installed at the right end of the lathe head in a rotatable and axial sliding mode, the tail end of the right workpiece shaft is connected with a clamping driving device through an elastic jacking assembly, and the clamping driving device comprises a clamping air cylinder and a light pressing air cylinder which are arranged in a linkage mode. The grading clamping action of the right chuck is achieved through the cooperation of the ejector rod shaft and the compression spring. Through linkage of the clamping air cylinder and the light pressing air cylinder, the graded clamping action of the right clamping head is achieved, and proper clamping force can be provided through graded clamping according to different machining stages and characteristics of optical lenses.

Description

Technical Field

[0001] This utility model relates to the field of automatic optical edge grinding machine technology and equipment, specifically a centrifugal clamping mechanism for an automatic optical edge grinding machine. Background Technology

[0002] In the field of optical lens processing, automatic optical edging machines, also known as automatic core pickers, are key equipment used to grind the outer circle of optical lenses and ensure that the outer circle axis is concentric with the optical axis. In actual production, the picking and placing of products usually relies on a robot. However, when the optical lens is clamped onto the chuck at the left end of the workpiece shaft, positional deviations are inevitable due to various factors such as the robot's operating accuracy and the clearance between the chuck and the lens.

[0003] This positional deviation has a serious impact on the quality of subsequent edge grinding. If it cannot be effectively eliminated, it will cause the outer circular axis of the optical lens to fail to achieve the ideal concentricity with the optical axis, thereby reducing the optical performance of the lens and even causing the product to be scrapped.

[0004] Currently, existing clamping mechanisms have certain limitations in solving the problem of optical lens clamping position deviation. For some optical lens products with small clamping coefficients and poor mechanical centering effect, conventional clamping methods are difficult to meet the requirements of high-precision axis alignment. Utility Model Content

[0005] The purpose of this utility model is to solve the above-mentioned technical problems, thereby providing a centrifugal clamping mechanism for an automatic optical edge grinding machine;

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] This invention provides a centrifugal clamping mechanism for an automatic optical edge grinding machine.

[0008] The device includes a headstock, a symmetrically arranged left and right workpiece shafts, and left and right chucks respectively mounted on the ends of the two shafts. The left workpiece shaft is fixed to the left end of the headstock and can only rotate. The right workpiece shaft is rotatable and axially slidingly mounted on the right end of the headstock. The tail end of the right workpiece shaft is connected to a clamping drive device through an elastic top-pressing assembly. The clamping drive device includes a clamping cylinder and a light-pressure cylinder that are linked together. The step-by-step clamping action of the right chuck is realized through the cooperation of the top rod shaft and the compression spring.

[0009] Optionally, the elastic pressing assembly includes a compression spring sleeved outside the push rod shaft, and the front end of the push rod shaft is connected to the bearing seat at the tail end of the right workpiece shaft through a plane bearing, so that the push rod shaft can move axially with the right workpiece shaft but remain stationary and rotating.

[0010] Optionally, a spring sleeve is connected to the end of the piston rod of the clamping cylinder. The spring sleeve is coaxially sleeved on the outside of the compression spring, and the tail end of the push rod shaft passes through the spring sleeve to form a floating connection with the piston rod of the clamping cylinder.

[0011] Optionally, the clamping drive device includes a clamping cylinder and a light pressure cylinder arranged in series. The clamping cylinder and the light pressure cylinder are connected by a buffer baffle. The light pressure cylinder is fixed to the right side of the cab by a mounting bracket, and a hydraulic buffer cylinder is configured on the mounting bracket.

[0012] Optionally, a vacuum connector is provided at the tail end of the left workpiece shaft, and the vacuum connector is connected to the adsorption structure at the left chuck through the internal channel of the left workpiece shaft.

[0013] Optionally, the planar bearing is a double-direction thrust ball bearing, with its outer ring interference fit with the bearing housing and its inner ring circumferentially positioned with the front end of the push rod shaft through a keyway structure.

[0014] In summary, this utility model has the following beneficial effects:

[0015] This application achieves graded clamping of the right chuck by linking a clamping cylinder and a light-pressure cylinder. The graded clamping can provide appropriate clamping force according to different processing stages and characteristics of the optical lens. For example, light pressure is used when initially contacting the workpiece to avoid workpiece deformation or positional displacement due to excessive clamping force. The clamping force is gradually increased during subsequent processing to ensure workpiece stability. Precise clamping force control can effectively reduce processing errors caused by improper clamping, improve the concentricity of the outer circular axis of the optical lens with the optical axis, and thus improve processing accuracy. Attached Figure Description

[0016] Figure 1 This is the main view of the structure of this utility model.

[0017] Figure 2 This is a partial structural cross-sectional view of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1-Headstock box, 2-Left workpiece shaft, 3-Right workpiece shaft, 4-Left chuck, 5-Right chuck, 6-Clamping cylinder, 7-Light pressure cylinder, 8-Push rod shaft, 9-Compression spring, 10-Side bearing, 11-Bearing seat, 12-Spring sleeve, 13-Buffer baffle, 14-Hydraulic buffer cylinder, 15-Vacuum connector, 16-Mounting bracket. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Example:

[0021] like Figures 1-2 As shown, this utility model provides a centrifugal clamping mechanism for an automatic optical edge grinding machine.

[0022] The machine includes a headstock 1, a symmetrically arranged left workpiece shaft 2 and right workpiece shaft 3, and a left chuck 4 and a right chuck 5 respectively mounted on the two ends of the shafts. The left workpiece shaft 2 is fixed to the left end of the headstock 1 and can only rotate. The right workpiece shaft 3 is rotatable and axially slidingly mounted on the right end of the headstock 1. The tail end of the right workpiece shaft 3 is connected to a clamping drive device through an elastic top pressing assembly. The clamping drive device includes a clamping cylinder 6 and a light pressure cylinder 7 that are linked together. The right chuck 5 performs a graded clamping action through the cooperation of a top rod shaft 8 and a compression spring 9.

[0023] The left workpiece shaft 2 is fixed to the left end of the headstock 1 and can only rotate, providing a stable base for the workpiece to rotate. The right workpiece shaft 3 is rotatable and axially slidingly mounted on the right end of the headstock 1, allowing the right workpiece shaft 3 to move axially while rotating, providing flexibility for subsequent clamping actions. The tail end of the right workpiece shaft 3 is connected to the clamping drive device through an elastic top pressing assembly. The clamping drive device includes a clamping cylinder 6 and a light pressure cylinder 7 that are linked together. The right chuck 5 achieves graded clamping action through the cooperation of the top rod shaft 8 and the compression spring 9. Graded clamping can provide appropriate clamping force according to different processing stages and workpiece characteristics, avoiding damage to the workpiece due to excessive clamping force or loosening of the workpiece due to insufficient clamping force, thereby ensuring the stability and processing accuracy of the workpiece during processing.

[0024] Optionally, the elastic pressing assembly includes the compression spring 9 sleeved outside the push rod shaft 8, and the front end of the push rod shaft 8 is connected to the bearing seat at the tail end of the right workpiece shaft 3 through a plane bearing 10, so that the push rod shaft 8 can move axially with the right workpiece shaft 3 but remain stationary and rotating.

[0025] The compression spring 9, sleeved outside the push rod shaft 8 in the elastic pressing assembly, serves to buffer and provide elastic force. The front end of the push rod shaft 8 is connected to the bearing seat 11 at the tail end of the right workpiece shaft 3 via a plane bearing 10, allowing the push rod shaft 8 to move axially with the right workpiece shaft 3 while maintaining a stationary rotational state. When the right workpiece shaft 3 moves axially to achieve the clamping action, the plane bearing 10 can reduce frictional resistance, ensuring smooth movement between the push rod shaft 8 and the right workpiece shaft 3, while ensuring that the push rod shaft 8 does not rotate with the right workpiece shaft 3, avoiding the influence of additional force and torque generated by rotation on the clamping mechanism, and improving the reliability and stability of the clamping mechanism.

[0026] Optionally, a spring sleeve 12 is connected to the end of the piston rod of the clamping cylinder 6. The spring sleeve 12 is coaxially sleeved on the outside of the compression spring 9. The tail end of the push rod shaft 8 passes through the spring sleeve 12 and forms a floating connection with the piston rod of the clamping cylinder 6.

[0027] The spring sleeve 12, connected to the end of the piston rod of the clamping cylinder 6, is coaxially sleeved on the outside of the compression spring 9, which protects and guides the compression spring 9, preventing it from shifting or bending during the force process and ensuring its normal operation. The tail end of the push rod shaft 8 passes through the spring sleeve 12 and forms a floating connection with the piston rod of the clamping cylinder 6. The floating connection allows the push rod shaft 8 to have a certain amount of movement in the axial direction and within a certain angle range, which can adapt to the slight deviations that may occur during the rotation and axial movement of the right workpiece shaft 3, further improving the adaptability and stability of the clamping mechanism and ensuring the accuracy and reliability of the clamping action.

[0028] Optionally, the clamping drive device includes the clamping cylinder 6 and the light pressure cylinder 7 arranged in series. The clamping cylinder 6 and the light pressure cylinder 7 are connected by a buffer baffle 13. The light pressure cylinder 7 is fixed to the right side of the front box 1 by a mounting bracket 16, and a hydraulic buffer cylinder is arranged on the side of the mounting bracket 16.

[0029] The clamping cylinder 6 and the light pressure cylinder 7, which are connected in series in the clamping drive device, are connected by a buffer baffle 13. The series structure can realize graded control of the clamping force. The light pressure cylinder 7 is fixed to the right side of the head box 1 by the mounting bracket 16. The hydraulic buffer cylinder configured on the side of the mounting bracket 16 can play a buffering role during the clamping process, reduce the impact of the clamping action on the workpiece and the mechanism, avoid damage to the workpiece or vibration of the mechanism due to excessive impact force, improve the processing quality and service life of the mechanism. At the same time, the graded control of the clamping force can be adjusted according to different processing requirements to meet the processing requirements of different types of optical lenses.

[0030] Optionally, a vacuum connector 15 is provided at the tail end of the left workpiece shaft 2, and the vacuum connector 15 is connected to the adsorption structure at the left chuck 4 through the internal channel of the left workpiece shaft 2.

[0031] The vacuum connector 15 at the tail end of the left workpiece shaft 2 is connected to the adsorption structure at the left chuck 4 through the internal channel of the left workpiece shaft 2. This allows the lens to be fixed on the left chuck 4 by vacuum adsorption when clamping the optical lens. Vacuum adsorption has the advantages of uniform adsorption force and minimal damage to the workpiece surface. It can improve the stability and accuracy of workpiece clamping, reduce processing errors caused by loose clamping, and is applicable to optical lenses of various shapes and sizes, thus improving the versatility of the mechanism.

[0032] Optionally, the planar bearing 10 is a double-direction thrust ball bearing, with its outer ring interference fit with the bearing housing 11 and its inner ring circumferentially positioned with the front end of the push rod shaft 8 through a keyway structure.

[0033] The planar bearing 10 is a double-direction thrust ball bearing. Its outer ring is interference-fitted with the bearing housing 11, which can ensure a tight connection between the bearing and the bearing housing 11 and avoid loosening or relative movement. The inner ring and the front end of the push rod shaft 8 are circumferentially positioned through a keyway structure, which can ensure the relative position stability between the push rod shaft 8 and the planar bearing 10, prevent the push rod shaft 8 from circumferentially moving during rotation, ensure the normal operation of the clamping mechanism and the accuracy of the clamping action, and improve the reliability and stability of the entire centrifugal clamping mechanism.

[0034] This application utilizes the principle of centrifugal force and the cooperation of mechanical structure to achieve the clamping and axis alignment of optical lenses. When the optical lens is placed on the left chuck 4 and fixed by vacuum adsorption, the clamping drive device starts to work. The clamping cylinder 6 and the light pressure cylinder 7 are linked together. Through the cooperation of the push rod shaft 8 and the compression spring 9, the right chuck 5 moves to the left to apply clamping force to the optical lens. During the rotation of the right workpiece shaft 3, due to the positional deviation of the optical lens during clamping, the optical lens will gradually adjust its position under the action of centrifugal force, so that its outer circle axis and the rotation axis gradually become concentric. At the same time, the plane bearing 10, spring sleeve 12 and other components in the mechanical structure ensure the stability and flexibility of the right workpiece shaft 3 during rotation and axial movement, so that the clamping action can be carried out smoothly. The staged clamping can provide appropriate clamping force according to different processing stages and workpiece characteristics, ensuring the stability and processing accuracy of the optical lens during the processing.

[0035] In the process of using this application, the robot first places the optical lens on the left chuck 4. The vacuum connector 15 at the tail end of the left workpiece shaft 2 is connected to the adsorption structure at the left chuck 4 through the internal channel of the left workpiece shaft 2. The vacuum adsorption device is activated, so that the optical lens is firmly adsorbed on the left chuck 4. The light pressure cylinder 7 in the clamping drive device starts to move, pushing the push rod shaft 8 to move to the left. The compression spring 9 is compressed, and the right chuck 5 moves to the left under the action of the push rod shaft 8, applying a small initial clamping force to the optical lens, so that the optical lens is initially fixed. The motor is started, so that the left workpiece shaft 2 and the right workpiece shaft 3 drive the optical lens to rotate at high speed. Due to the positional deviation of the optical lens during clamping, the optical lens will gradually adjust its position under the action of centrifugal force. The outer circle axis of the optical lens is gradually aligned with the rotation axis. After the optical lens is initially aligned, the clamping cylinder 6 starts to move, further pushing the push rod shaft 8 to the left to increase the clamping force on the optical lens, thus achieving graded clamping. Graded clamping can provide appropriate clamping force according to the characteristics and processing requirements of the optical lens, ensuring the stability and processing accuracy of the optical lens during processing. After the optical lens is stably clamped, the automatic optical edging machine begins to grind the outer circle of the optical lens. After the edging is completed, the clamping cylinder 6 and the light pressure cylinder 7 are reset in sequence, and the push rod shaft 8 moves to the right under the action of the compression spring 9. The right chuck 5 releases the optical lens, and the robot arm removes the processed optical lens, completing one processing cycle.

[0036] This application achieves graded clamping action of the right chuck 5 by linking the clamping cylinder 6 and the light-pressure cylinder 7. The graded clamping can provide appropriate clamping force according to different processing stages and characteristics of the optical lens. For example, light pressure is used when initially contacting the workpiece to avoid workpiece deformation or positional displacement due to excessive clamping force. The clamping force is gradually increased in subsequent processing to ensure workpiece stability. Precise clamping force control can effectively reduce processing errors caused by improper clamping, improve the concentricity of the outer circular axis of the optical lens with the optical axis, and thus improve processing accuracy.

[0037] By utilizing the centrifugal force generated by the high-speed rotation of the right workpiece shaft 3, combined with the mechanical structure, the optical lens with positional deviation during clamping is automatically adjusted to achieve axis alignment. For optical lens products with small clamping coefficient and poor mechanical centering, the centrifugal alignment function of this application can automatically adjust the optical lens to a suitable position during rotation, ensuring machining accuracy.

[0038] The push rod shaft 8 at the tail end of the right workpiece shaft 3 is connected to the bearing seat 11 through the plane bearing 10, so that the push rod shaft 8 can move axially with the right workpiece shaft 3 but remain stationary and rotated, which reduces frictional resistance and avoids the influence of additional force and torque generated by rotation on the clamping mechanism. The plane bearing 10 of this application improves the stability and reliability of the clamping mechanism and extends the service life of the mechanism.

[0039] The end of the push rod shaft 8 passes through the spring sleeve 12 and forms a floating connection with the piston rod of the clamping cylinder 6. This allows the push rod shaft 8 to have a certain amount of movement within the axial and certain angle range. The floating connection method can adapt to the small deviations that may occur during the rotation and axial movement of the right workpiece shaft 3, further improving the adaptability and stability of the clamping mechanism and ensuring the accuracy and reliability of the clamping action.

[0040] This application enables automated operation. From workpiece clamping, clamping, and alignment to clamp release after processing, the entire process requires minimal human intervention. Automated operation not only improves production efficiency but also reduces the impact of human factors on processing quality.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A centrifugal clamping mechanism for an automatic optical edge grinding machine, characterized in that, The device includes a headstock, a symmetrically arranged left and right workpiece shafts, and left and right chucks respectively mounted on the ends of the two shafts. The left workpiece shaft is fixed to the left end of the headstock and can only rotate. The right workpiece shaft is rotatable and axially slidingly mounted on the right end of the headstock. The tail end of the right workpiece shaft is connected to a clamping drive device through an elastic top-pressing assembly. The clamping drive device includes a clamping cylinder and a light-pressure cylinder that are linked together. The step-by-step clamping action of the right chuck is realized through the cooperation of the top rod shaft and the compression spring.

2. The centrifugal clamping mechanism of an automatic optical edge grinding machine according to claim 1, characterized in that, The elastic pressing assembly includes a compression spring sleeved outside the push rod shaft. The front end of the push rod shaft is connected to the bearing seat at the tail end of the right workpiece shaft through a plane bearing, so that the push rod shaft can move axially with the right workpiece shaft but remain stationary and rotating.

3. The centrifugal clamping mechanism of an automatic optical edge grinding machine according to claim 2, characterized in that, A spring sleeve is connected to the end of the piston rod of the clamping cylinder. The spring sleeve is coaxially sleeved on the outside of the compression spring. The tail end of the push rod shaft passes through the spring sleeve and forms a floating connection with the piston rod of the clamping cylinder.

4. The centrifugal clamping mechanism of an automatic optical edge grinding machine according to claim 1, characterized in that, The clamping drive device includes a clamping cylinder and a light pressure cylinder arranged in series. The clamping cylinder and the light pressure cylinder are connected by a buffer baffle. The light pressure cylinder is fixed to the right side of the cab by a mounting bracket, and a hydraulic buffer cylinder is configured on the mounting bracket.

5. The centrifugal clamping mechanism of an automatic optical edge grinding machine according to claim 1, characterized in that, A vacuum connector is provided at the tail end of the left workpiece shaft, and the vacuum connector is connected to the adsorption structure at the left chuck through the internal channel of the left workpiece shaft.

6. The centrifugal clamping mechanism of an automatic optical edge grinding machine according to claim 2, characterized in that, The planar bearing is a double-direction thrust ball bearing, with its outer ring interference fit with the bearing housing and its inner ring circumferentially positioned with the front end of the push rod shaft through a keyway structure.

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