Optical glass pressing plate multi-cutter cutting process

Abstract

The invention relates to the technical field of optical glass, in particular to an optical glass pressing plate multi-cutter cutting process which is characterized by at least comprising the following steps: S1, selecting optical glass raw materials with different thicknesses larger than the product size requirement; s2, cutting the optical glass raw material into the weight required by the hot-pressed square plate optical glass, and taking the cut optical glass raw material as a prepared material; s3, designing a proper square plate mold; s4, performing hot pressing on the prepared material to form square plate optical glass with specified thickness; and S5, performing multi-cutter cutting on the square plate optical glass to obtain a product with a required size. Through combination of optical glass material preparation, square plate mold design, square plate optical glass hot pressing and multi-cutter cutting, the use amount of raw materials can be strictly controlled, excessive material abrasion is avoided, the cutting rate and production efficiency of the optical glass are improved, optical material products with accurate sizes and excellent molding are prepared, large-scale production is formed, and the production cost is reduced. The market requirements are met.

Description

Technical Field

[0001] The present invention relates to the field of optical glass technology, in particular to the field of IPC C03, and more specifically to a multi-knife cutting process for an optical glass pressing plate. Background Art

[0002] Optical glass is the foundation and an important part of the optoelectronic technology industry, and is the main material for manufacturing optical lenses and optical instruments. Optical glass is made by adding light-sensitive substances, such as silver chloride, silver bromide, etc., to ordinary glass raw materials, and then adding sensitizers to make the produced glass more sensitive to light. The cutting process of optical glass in the manufacture and use of optical glass is an important process in the production of optical glass. The traditional optical glass cutting process relies on workers' manual operation, which makes it difficult to ensure the size specifications, cutting quality and efficiency of optical glass. The workers' operation is highly dangerous. Moreover, manual operation makes it difficult to ensure the accuracy of the cutting size, resulting in a large amount of material loss during the cutting process and increased production costs.

[0003] Laser cutting can only be performed on transparent surfaces. Optical glass raw material strips only have one transparent surface on the top, which cannot solve the problem of re-cutting in the thickness direction. The melting thickness of optical glass raw materials is limited, and the tolerance is large. For materials with inappropriate thickness, the loss will be greater. The edges of raw material strips have a large curvature that affects material utilization. The bottom has a chain mark that affects the thickness and the bottom's demand for a flat surface. Additional abrasion processing is required to eliminate the chain mark.

[0004] CN 104891496 A discloses a method for non-destructive cutting of optical glass from large to small. First, an ultrasonic instrument is used to clean the glass surface to achieve a clean effect; secondly, the glass surface is scribed by adjusting the focused CO2 laser power and the running speed twice, and then a non-focal CO2 laser is used to scan to separate the glass under the action of thermal stress; finally, the grinding liquid is used to stir so that the glass hits each other, thereby achieving the effect of cleaning and smoothness, improving work efficiency, and reducing the material loss rate. The invention is designed to adopt a CO2 laser cutting processing method to solve the problem of effective cutting of optical glass, reduce material loss in the production process, improve work efficiency, achieve efficient large-scale production, and promote the formation and expansion of the industrial chain. It is of great significance to my country's economic development and industrial structure adjustment. However, CO2 laser cutting machines are expensive, and the maintenance costs of accessories and consumables are extremely high. The gas consumption is large during cutting, the operation is complicated, and the actual use cost is very high. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a multi-knife cutting process for an optical glass platen, which at least comprises the following steps:

[0006] S1: Select optical glass raw materials of different thicknesses that are larger than the product size requirements;

[0007] S2: Cutting the optical glass raw materials into the required weight of hot-pressed square optical glass as the preparation material;

[0008] S3: Design the mold required for hot pressing square plates;

[0009] S4: hot pressing the prepared material into a square plate optical glass of a specified thickness;

[0010] S5: Cut the square optical glass into products of required size by multiple cuts.

[0011] Preferably, the specific operation of step S2 is: according to the size requirements of the product and the loss of multi-knife cutting, the required weight of the square plate optical glass is calculated, and the optical glass raw material is cut into the required weight.

[0012] Preferably, the loss calculation formula of the multi-blade cutting is blade thickness*number of uses*cutting length*cutting thickness.

[0013] Preferably, the specific operation of step S3 is: the size calculation formula of the square plate mold is: required product size*(cutting blade+1)+loss due to multi-blade cutting.

[0014] Preferably, the specific operation of step S4 is: placing the cut stock into a square plate mold, and hot pressing it into a square plate optical glass of a specified thickness.

[0015] Preferably, the hot pressing conditions are set according to the material TG temperature. The heating furnace is electrically heated at 700-900°C for 8-10 stages to soften the material. The square plate mold is used to die-cast the square plate. The pressure is 3-6 kg / cm 2 , 700 ~ 400 ℃ slow cooling furnace to cool naturally.

[0016] Preferably, the specific operation of step S6 is: multiple cutting blades are loaded on a cutting machine, and the cutting machine cuts the square plate optical glass into strips, and then turns to cut it into particles, so as to obtain products of required sizes.

[0017] Preferably, the length and width of the medium having the required size between the cutting blades are controlled.

[0018] Preferably, the medium is at least one of a marble sheet and a diamond sheet.

[0019] Preferably, the medium is a diamond disc with a thickness of 0.2 mm and a diameter of 110 mm.

[0020] Preferably, the density of the optical glass raw material is 2.4-2.6 g / cm 3, the thermal expansion coefficient is (7.4-7.6)×10 -6 / K.

[0021] Preferably, the density of the optical glass raw material is 2.5 g / cm 3 , the thermal expansion coefficient is 7.5×10 -6 / K.

[0022] Preferably, the platen multi-knife cutting process is applied in the cutting process of optical glass.

[0023] In the present application, by adopting square plate mold design, hot pressing of square plate optical glass and multi-knife cutting, before optical glass cutting, the mold size required for hot pressing of optical glass is designed one-to-one according to the required size of different products and the different degrees of loss generated in the cutting process, and the weight of optical glass raw materials required for the square plate mold is calculated, so that the amount of raw materials used can be strictly controlled, avoiding the need for cutting workers to roughly estimate the amount of raw materials used based on work experience during subsequent cutting of workpieces, resulting in a large amount of material loss, leading to serious waste of optical glass materials and increased production costs. Optical glass secondary molding technology is further used to perform high-temperature hot pressing on the above-mentioned calculated and cut optical glass raw materials, so that the thickness of the optical glass material can be accurately controlled according to the size of the required product, which can further reduce the loss of optical glass materials and avoid the need to adjust the cutting position and angle of the optical glass material for a long time before subsequent multi-knife cutting, so that the cutting machine is idle for a long time waiting for feeding, increasing processing costs, and reducing the cutting rate and production efficiency of optical glass. Temporary adjustment of the cutting angle of the optical glass material will cause excess thickness wear, and the greater the thickness difference, the greater the loss generated. Finally, by setting the number of blades required for multi-knife cutting according to the size of the required product, setting the blades equally, and cutting the square glass with precise dimensions according to the cutting positions, an optical material product with precise dimensions and excellent molding can be obtained.

[0024] Beneficial effects:

[0025] 1. This application designs a suitable optical glass square plate mold, calculates the mold design dimensions according to the required product size and the loss generated by the blade cutting process, and accurately controls the shape and size of the mold, thereby effectively improving the molding effect of the optical glass product and reducing the loss of optical glass raw materials.

[0026] 2. The present application cuts the weight of the optical glass raw materials required for the hot-pressed square plate in advance according to the size of the required product and the weight required by the square plate optical glass mold, thereby avoiding a large amount of excess material due to excessive weight during cutting, resulting in waste of optical glass materials, and avoiding insufficient weight resulting in unformed cutting, thereby reducing production efficiency.

[0027] 3. The present application can control the thickness of the hot-pressed square optical glass according to the required size of the product by hot-pressing the cut optical glass stock, thereby avoiding abrasion caused by excess thickness of the square optical glass, reducing thickness difference, and reducing optical glass material loss.

[0028] 4. This application can quickly cut the optical glass into products of desired size and shape by accurately calculating the size of the optical glass product in advance, using the required number of blades for simultaneous cutting, and arranging the medium of the required size between the cutting blades to control the length and width.

[0029] 5. The present application combines the preparation of optical glass materials, the design of square plate molds, the hot pressing of square plate optical glass and multi-knife cutting. Before cutting the optical glass, the mold size required for hot pressing of the optical glass is designed one-to-one according to the required sizes of different products and the different degrees of loss generated during the cutting process. The weight of the optical glass raw materials required for the square plate mold is calculated, and the material thickness is controlled. The amount of raw materials used can be strictly controlled to avoid excess material wear, maximize the utilization of optical glass materials, improve the cutting rate and production efficiency of optical glass, and produce optical material products with precise size and excellent molding, forming large-scale production. It can be applicable to the preparation of cube optical glass or the production of cube optical glass products to meet market demand. DETAILED DESCRIPTION

[0030] Example

[0031] Embodiment 1 provides a multi-knife cutting process for an optical glass platen, comprising the following steps:

[0032] The dimensions of optical glass raw materials are: length 360*width 120~160*10 (15, 20, 25 thickness specification tolerance is +2mm);

[0033] S1: According to the product size requirements (8mm*8mm*8mm, tolerance ±0.1) * specific gravity 2.52g / cm 3 Each piece weighs 1.29g, and the optical glass raw material with the size of 360mm*160mm*10mm (tolerance +2, taking the smallest value) is selected;

[0034] (Note: When using laser cutting technology, it must first be cut into 8*8*10 shapes* specific gravity 2.52g / cm 3 The weight of a single bead is 1.61g, and the thickness of 10mm needs to be worn down to 8mm by other processing methods to obtain the size of 8*8*8. The weight of a single bead is 1.29g, and the loss ratio is 24.8%. )

[0035] S2: According to the product size requirements (8mm*8mm*8mm) and the loss of multi-knife cutting, the loss is 0.2mm of blade thickness, calculate the required weight of square plate optical glass, and cut the optical glass raw materials into the required square plate stock weight;

[0036] S3: The calculation formula based on the size of the square plate mold is: one square plate produces 100 products, the required product size * equal fraction (cutting blade + 1) + multi-blade cutting loss, the required square plate mold size is set to 8mm*(9+1)+0.2mm*9=81.8mm; the weight of 100 square plate materials = 81.8mm*81.8mm*8mm*2.52g / cm 3 =134.9g, loss 4.6%.

[0037] S4: putting the cut stock into a square plate mold and hot pressing it into a square plate optical glass with a thickness of 81.8 mm*81.8 mm*8 mm;

[0038] S5: Load multiple cutting blades on the cutting machine, and the cutting machine cuts the square optical glass into 10 strips, and then turns to cut it into 100 particles, so that 100 products with a size of 8mm*8mm*8mm are obtained.

[0039] A diamond disc with a thickness of 0.2 mm and a diameter of 110 mm is provided between the cutting blades as a medium for controlling the length and width.

[0040] The original optical glass material was purchased from Chengdu Guangming Optoelectronics Co., Ltd. The model is H-K9L. The density of the optical glass raw material is 2.52g / cm 3 , the thermal expansion coefficient is 7.6×10 -6 / K. TG temperature 560℃

[0041] The platen multi-knife cutting process is applied in the cutting process of optical glass.

[0042] Example 2

[0043] The specific implementation of this embodiment is the same as that of Embodiment 1, except that: in step S1, an optical glass raw material with a size of 360 mm*160 mm*12 mm (when the tolerance is the largest) is selected.

[0044] (Note: Laser cutting technology must first be cut into 8*8*12 shapes * specific gravity 2.52g / cm 3 The weight of a single bead is 1.94g, and the thickness of 12mm needs to be worn down to 8mm by other processing methods to obtain the size of 8*8*8. The weight of a single bead is 1.29g, and the loss ratio is 50%. )

[0045] Example 3

[0046] The specific implementation of this embodiment is the same as that of embodiment 1, except that in step S1: according to the product size requirements (10mm*10mm*10mm, tolerance ±0.1)* specific gravity 2.52g / cm 3 Each piece weighs 2.52g, and the optical glass raw material is selected with a size of 360mm*160mm*12mm (tolerance +2, taking the smallest value).

[0047] (Note: When using laser cutting technology, it must first be cut into a 10*10*12 shape with a specific gravity of 2.52g / cm 3 The weight of a single bead is 3.02g, and the thickness of 12mm needs to be worn down to 10mm by other processing methods to obtain the size of 10*10*10. The weight of a single bead is 2.52g, and the loss is 20%. )

[0048] S2: According to the product size requirements (10mm*10mm*10mm) and the loss of multi-knife cutting, the loss is 0.2mm of blade thickness, calculate the required weight of square plate optical glass, and cut the optical glass raw materials into the required square plate stock weight;

[0049] S3: The calculation formula based on the size of the square plate mold is: one square plate produces 100 products, the required product size * equal fraction (cutting blade + 1) + multi-blade cutting loss, the required square plate mold size is set to 10mm*(9+1)+0.2mm*9=101.8mm; the weight of 100 square plate materials = 101.8mm*101.8mm*10mm*2.52g / cm 3 =261.2g, loss 3.63%.

[0050] S4: placing the cut stock into a square plate mold and hot pressing it into a square plate optical glass with a thickness of 101.8 mm*101.8 mm*10 mm;

[0051] S5: Load multiple cutting blades on the cutting machine, and the cutting machine cuts the square optical glass into 10 strips, and then turns to cut it into 100 particles, so that 100 products with a size of 10mm*10mm*10mm are obtained.

[0052] Example 4

[0053] The specific implementation of this embodiment is the same as that of embodiment 3, except that in step S1: according to the product size requirements (10mm*10mm*10mm, tolerance ±0.1)*specific gravity 2.52g / cm 3 Each piece weighs 2.52g, and the optical glass raw material with a size of 360mm*160mm*14mm (when the tolerance is maximum) is selected.

[0054] (Note: Laser cutting technology must first be cut into 10*10*14 shape * specific gravity 2.52g / cm 3 The weight of a single bead is 3.53g, and the thickness of 14mm needs to be worn down to 10mm by other processing methods to obtain the size of 10*10*10. The weight of a single bead is 2.52g, and the loss is 40%. )

[0055] Performance Testing Methods

[0056] 1. Loss test: Calculate the loss ratio of the optical glass material during the processing of Examples 1-4. Loss ratio = (optical glass raw material weight - product weight) / product weight. The calculation results are recorded in Table 1.

[0057] Table 1

[0058]

Claims

1. An optical glass platen multi-knife cutting process, characterized in that: At least the following steps are included: S1: Select optical glass raw materials of different thicknesses that are larger than the product size requirements; S2: Cutting the optical glass raw materials into the required weight of hot-pressed square optical glass as the preparation material; S3: Design the mold required for hot pressing square plates; S4: hot pressing the prepared material into a square plate optical glass of a specified thickness; S5: Cut the square optical glass into products of required size by multiple cuts.

2. The optical glass platen multi-knife cutting process according to claim 1, characterized in that: The specific operation of step S2 is: according to the size requirements of the product and the loss of multi-knife cutting, the required weight of the square plate optical glass is calculated, and the optical glass raw material is cut into the required weight.

3. The optical glass platen multi-knife cutting process according to claim 1, characterized in that: The specific operation of step S3 is: the size calculation formula of the square plate mold is: required product size*(number of cutting blades+1)+multi-blade cutting loss.

4. The optical glass platen multi-knife cutting process according to claim 1, characterized in that: The specific operation of step S4 is: putting the cut stock into a square plate mold and hot pressing it into a square plate optical glass of a specified thickness.

5. The optical glass platen multi-knife cutting process according to claim 4, characterized in that: The hot pressing conditions are set according to the material TG temperature. The heating furnace is heated in 8 to 10 stages to 700 to 900°C to soften the material. The square plate mold is used to die-cast the square plate. The pressure is 3 to 6 kg / cm 2 , 700 ~ 400 ℃ slow cooling furnace to cool naturally.

6. The optical glass platen multi-knife cutting process according to claim 1, characterized in that: The specific operation of step S5 is: multiple cutting blades are loaded on a cutting machine, and the cutting machine cuts the square plate optical glass into strips, and then turns to cut it into particles, so as to obtain products of required sizes.

7. The optical glass press plate multi-knife cutting process according to claim 6, characterized in that: The length and width of the medium with the required size between the cutting blades are controlled.

8. The optical glass platen multi-knife cutting process according to claim 7, characterized in that: The medium is at least one of a marble sheet and a diamond sheet.

9. The optical glass platen multi-knife cutting process according to claim 1, characterized in that: The density of the optical glass raw material is 2.4-2.6 g / cm 3 , the thermal expansion coefficient is (7.4-7.6)×10 -6 / K.

10. An application of the optical glass press plate multi-knife cutting process according to any one of claims 1 to 9, characterized in that: The pressure plate multi-knife cutting process is applied in the field of optical glass cutting.

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