CN201862780U - Aspheric lens numerical control lathe - Google Patents

Abstract

Aiming at the difficult problem of processing aspherical spectacle lenses, the utility model discloses a CNC lathe for aspheric spectacle lenses, which includes a computer control system (1), a bed (2), an X-direction slide (16), a Z-direction slide ( 3), spindle head (8), fixture (9), worktable (13), diamond turning tool (11), characterized in that the Z-direction slide (3) is installed on the bed (2), and the X-direction slide (16) is installed on the Z-direction slide (3); the workbench (13) is installed on the X-direction slide (16), and the diamond turning tool (11) is installed on the workbench (13) through the tool rest (12) ; The spindle head (8) is installed on the boss (6), the boss (6) is installed on the bed (2), the fixture (9) is installed on the front end of the spindle head (8); the workpiece (10) is installed on the fixture ( 9), driven by the spindle head (8) through the fixture (9) to realize the C-direction rotary movement; the computer control system (1) controls the movement of the tool relative to the workpiece to realize the processing of the aspherical spectacle lens surface.

Description

CNC lathe for aspherical spectacle lenses

technical field

The utility model relates to a numerical control lathe, in particular to a numerical control lathe for aspheric spectacle lenses.

Background technique

The edge of the traditional spherical lens has poor visual effect, and the lens is thick, which brings a lot of inconvenience to the wearer. Aspherical spectacle lenses can reduce the inherent aberration of spherical lenses very well. Compared with traditional spherical spectacle lenses, they have the advantages of almost constant off-axis equivalent focal power, small astigmatism, and small visual distortion, and are widely used in refraction. Correction.

The design and calculation of aspheric ophthalmic lenses is difficult, and the technical level is difficult to meet the requirements of design quality, which has been greatly restricted in application for a long time. The mold forming process lacks flexibility, the surface finish is not high, the processing materials are limited, and the aspheric mold processing is difficult; the CNC grinding process takes a long time for post-grinding and polishing, and the production cost is high.

Contents of the invention

The purpose of this utility model is to aim at the shortcomings of the existing aspheric surface processing methods, to provide a CNC lathe for single-point turning aspheric spectacle lenses with a diamond turning tool, and to use it to process the surface of aspheric spectacle lenses to obtain the required size and shape at one time Precision and surface roughness, with high efficiency and low cost advantages.

The technical scheme of the utility model is:

An aspherical CNC lathe for single-point turning with a diamond turning tool, including a computer control system 1, a bed 2, an X-direction slide 16, a Z-direction slide 3, a spindle head 8, a synchronous belt transmission device 7, and a diamond turning tool 11. Tool holder 12, workbench 13, fixture 9, characterized in that the Z-direction slide 3 is installed on the bed 2, the X-direction slide 16 is installed on the Z-direction slide 3; the workbench 13 is installed on the X-direction slide On the platform 16, the diamond turning tool 11 is installed on the workbench 13 through the tool holder 12; the spindle head 8 is installed on the boss 6, the boss 6 is installed on the bed 2, and the clamp 9 is installed on the front end of the spindle head 8; the workpiece 10 Installed on the fixture 9, it is driven by the spindle head 8 through the fixture 9 to realize the C-direction rotary motion; the computer control system 1 controls the movement of the tool relative to the workpiece to realize the processing of the aspherical spectacle lens surface.

The fixture 9 is a special fixture for turning aspherical spectacle lenses, which realizes fast clamping of the workpiece 10 .

The utility model has the following advantages:

1) Process the aspherical model data through the computer control system, control the relative spatial movement between the diamond turning tool and the workpiece, and solve the problem of aspheric lens processing.

2) Good surface quality. Using diamond as a tool material has the advantages of low friction coefficient, high thermal conductivity, and high hardness. It can achieve extremely sharp cutting edges through sharpening, and the cutting force is small during processing, so good surface quality can be obtained.

3) High processing precision. Single-point turning with diamond turning tools can process high-precision aspheric ophthalmic lenses.

4) High processing efficiency. The CNC lathe has a high degree of automation, and can obtain the size, shape accuracy, and surface roughness of the aspheric lens at one time, thereby improving processing efficiency.

Description of drawings

Figure 1 is a schematic diagram of the structure of the CNC lathe for aspherical spectacle lenses

In the figure, 1. Computer control system, 2. Lathe bed, 3. Z-direction sliding table, 4. C-direction servo motor, 5. C-direction motor support, 6. Boss, 7. Synchronous belt transmission device, 8. Spindle head, 9. Fixture, 10. Work piece, 11. Diamond turning tool, 12. Tool holder, 13. Workbench, 14. X-direction motor connection seat, 15. X-direction servo motor, 16. X-direction sliding table, 17 .Z-direction motor connection seat, 18.Z-direction servo motor.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1.

An aspherical CNC lathe for single-point turning with a diamond turning tool, including a computer control system 1, a bed 2, an X-direction slide 16, a Z-direction slide 3, a spindle head 8, a synchronous belt transmission device 7, and a diamond turning tool 11. Tool post 12, workbench 13, fixture 9, characterized in that the Z-direction slide 3 is installed on the bed 2, and the Z-direction servo motor 18 is installed on the top of the Z-direction slide 3 through the Z-direction motor connection seat 17. The Z-direction servo motor 18 drives the Z-direction slide 3 to perform Z-direction feed movement; the X-direction slide 16 is installed on the Z-direction slide 3, and the X-direction servo motor 15 is installed on the X-direction slide through the X-direction motor connection seat 14 16, the X-direction servo motor 15 drives the X-direction slide 16 to perform X-direction feed movement; the workbench 13 is installed on the X-direction slide 16, and the diamond turning tool 11 is installed on the workbench 13 through the tool holder 12; The head 8 is installed on the boss 6, the boss 6 is installed on the bed 2, the fixture 9 is installed on the front end of the spindle head 8; the C-direction servo motor 4 is installed on the side platform of the bed 2 through the C-direction motor support 5, and the The synchronous belt transmission device 7 drives the main shaft head 8 to rotate. The workpiece 10 is installed on the fixture 9, driven by the spindle head 8 through the fixture 9 to realize the C-direction rotary movement; the computer control system 1 controls the movement of the tool relative to the workpiece to realize the processing of the aspheric lens surface. The transmission parts of the X and Z two transmission shafts adopt rolling parts, and the structure of the servo motor directly connected to the ball screw makes the machine tool have high feed speed, good dynamic performance and high precision. The C direction adopts a rotary precision spindle head and a synchronous belt transmission mechanism, with no slippage in transmission, high transmission efficiency and high precision.

work process

First, clamp the workpiece 10 on the fixture 9, turn on the power, start the numerical control system, input the parameters of the aspheric spectacle lens through the computer control system 1, and the computer control system 1 performs data processing on the aspheric surface model to generate a numerical control processing program. The processing program controls the servo motors 4, 15, 18 to respectively drive the spindle head 8, the X-direction sliding table 16, and the Z-direction sliding table 3, and controls the diamond turning tool 11 to move along the X-axis of the lathe while making high-frequency reciprocating motion along the Z-direction. The displacement of the tool tip along the Z direction of the lathe changes with the change of the C-axis rotation angle to realize the relative movement of the workpiece 10 and the diamond turning tool 11 in space, thereby completing the processing of the aspheric spectacle lens by using the relative movement of the workpiece and the tool.

Claims (1)

1. A CNC lathe for aspherical spectacle lenses, comprising computer control system (1), bed (2), X-direction slide table (16), Z-direction slide table (3), spindle head (8), fixture (9 ), workbench (13), diamond turning tool (11), it is characterized in that the Z slide table (3) is installed on the bed (2), and the X slide table (16) is installed on the Z slide table (3) the workbench (13) is installed on the X-direction slide table (16), and the diamond turning tool (11) is installed on the workbench (13) through the tool holder (12); the spindle head (8) is installed on the boss (6 ), the boss (6) is installed on the bed (2), the fixture (9) is installed on the front end of the spindle head (8); the workpiece (10) is installed on the fixture (9), and the spindle head (8) passes through the fixture (9) Drive it to realize the C-direction rotary motion; the computer control system (1) controls the movement of the tool relative to the workpiece to realize the processing of the aspheric spectacle lens profile.

Images