A machining process for a turning prism

Abstract

The application discloses a processing technology of a turning prism, which comprises the following steps: S1, preparing processing tools; S2, rough grinding and forming according to product drawing size requirements to obtain a turning prism blank; S3, sealing one non-polished surface of the blank on a glass bottom plate by 417 glue, processing a right-angle surface parallel to the glass bottom plate, and coating other non-processing surfaces with protective paint; S4, processing the size according to process requirements, then processing a bottom plate, chamfering, and cleaning; and S5, sealing the polished right-angle surface on a chord surface of a single isosceles right-angle triangle body by a first special mold, sealing the isosceles right-angle triangle body on the glass bottom plate by a side surface of the isosceles right-angle triangle body which is perpendicular to the chord surface, processing another right-angle surface and a 45-degree surface, and coating other non-processing surfaces with protective paint, wherein 40-50 pieces of the glass bottom plate can be processed; the isosceles right-angle triangle body is simple in processing technology, easy to operate, and high in angle precision.

Description

Technical Field

[0001] This invention relates to the field of prism processing technology, specifically to a processing technology for a steering prism. Background Technology

[0002] A steering prism can realize optical path steering; it changes the original direction of the optical path to meet different mechanical structure designs and achieve the minimum distance between two lenses; it is generally used in steering optical systems.

[0003] The traditional method for producing steering prisms is to first make a workpiece identical to the steering prism as a support, and then seal the support with glue. The same support can be flipped three times for processing. However, the processing technology of this support is relatively complex and not very versatile. If a prism with a different steering angle is needed, the support needs to be made again. Moreover, after gluing the steering prism to the glass base plate with this support, it occupies a large area and has a low success rate. Summary of the Invention

[0004] The purpose of this invention is to provide a processing technology for a steering prism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a processing technology for a steering prism, characterized by comprising the following steps:

[0006] S1: Prepare processing tools, including: glass base plate, isosceles right triangle support body, isosceles right triangular prism support body, first special support mold, and second special support mold;

[0007] S2: According to the size requirements of the product drawing, the blank is roughly ground to obtain the blank of the steering prism. All surfaces of the blank have a machining allowance of 0.4mm and an angle of ±10'.

[0008] S3: Use 417 glue to seal one of the unpolished surfaces of the blank onto the glass base plate, process a right-angled surface parallel to the glass base plate, and apply protective paint to the other unprocessed surfaces.

[0009] S4: Fine grinding dimensions and surface shape are processed according to process requirements. First, high-speed polishing with polyurethane is used, followed by low-speed fine polishing with asphalt mold. After polishing, the aperture is checked with a plane interferometer. The aperture and surface finish are processed according to the drawing requirements. After polishing is completed, the plate is removed, the edges are beveled, and the plate is cleaned.

[0010] S5: Use the first special template to apply glue to the polished right-angled surface on the chord surface of a single isosceles right-angled triangle. Apply gloss glue to the side of the isosceles right-angled triangle perpendicular to the chord surface on the glass base plate. Process another right-angled surface. Apply protective paint to other non-processed surfaces. 40-50 pieces can be processed on one tray of this glass base plate.

[0011] S6: The size and surface type are processed according to the process requirements, first high-speed polishing with polyurethane, then low-speed precision polishing with asphalt mold, after polishing, the aperture is detected with a plane interferometer, the aperture and surface finish are processed according to the drawing requirements, and after polishing, the disc is lowered, the edge is inverted, and cleaning is performed.

[0012] S7: The isosceles right triangle body is placed under the disc, and the surface is turned over, one of the 45° surfaces is processed on the glass bottom plate by using the right angle surface of the isosceles right triangle body, and the other non-processed surface is coated with protective paint.

[0013] S8: The size and surface type are processed according to the process requirements, first high-speed polishing with polyurethane, then low-speed precision polishing with asphalt mold, after polishing, the aperture is detected with a plane interferometer, the aperture and surface finish are processed according to the drawing requirements, and after polishing, the disc is lowered, the edge is inverted, and cleaning is performed.

[0014] S9: The second special body is used, one of the processed right angle surfaces is glued on the isosceles right triangular prism body, the other right angle surface is placed on the reference surface of the second special body, and the total length of the product is controlled by using the processed 45° edge line, the three products are glued on the isosceles right triangular prism body in this way, and finally the right angle surface of the body is glued on the glass bottom plate to form a disc, another 45° surface is processed, and the other surfaces are coated with protective paint.

[0015] S10: The size and surface type are processed according to the process requirements, first high-speed polishing with polyurethane, then low-speed precision polishing with asphalt mold, after polishing, the aperture is detected with a plane interferometer, the aperture and surface finish are processed according to the drawing requirements, and after polishing, the disc is lowered, the edge is inverted, and cleaning is performed.

[0016] Preferably, the processing requirements of the isosceles right triangle body are: two right angle surfaces, chord surfaces and one side surface, angle 45°±30″, 90°±30″, aperture PV<1 / 4λ, surface finish 60-40.

[0017] Preferably, the processing requirements of the isosceles right triangular prism body are: angle 90° 45°±30″, total difference <30″, length 80mm.

[0018] Preferably, the first special body includes a first base, two isosceles right triangle pads, a square body, a square positioning block, and two isosceles right triangle positioning blocks, the chord surfaces of the two isosceles right triangle pads are fixed on the first base, the two isosceles right triangle pads are arranged adjacent to each other, the square body is arranged on the right side of the two isosceles right triangle pads, the square body is further provided with a square positioning block, one of the isosceles right triangle positioning blocks is arranged on the front side of the two isosceles right triangle pads, and the other isosceles right triangle positioning block is arranged on the right angle surface of one of the isosceles right triangle pads.

[0019] Preferably, the second special jigger comprises a second base, two isosceles right triangular prisms, two square supporting blocks, a rectangular body and a 45° positioning block are arranged on the second base, the right angle surface of the two isosceles right triangular prisms is fixed on the second base, and the two isosceles right triangular prisms are arranged adjacent to each other, the two square supporting blocks are arranged on the two sides of the V-shaped groove formed by the two isosceles right triangular prisms, the rectangular body is arranged above the two square supporting blocks, and the 45° positioning block is fixed on the side wall of the rectangular body.

[0020] Compared with the prior art, the beneficial effects of the present application are:

[0021] The isosceles right triangular body is simple in machining process, easy to operate, and high in angle precision;

[0022] The isosceles right triangular body can process steering prisms in any direction, and has strong versatility;

[0023] The isosceles right triangular body is used to glue the steering prisms on the glass bottom plate, one disc can process 40-50 pieces, the operation is simple during processing, the disc yield is high, the qualified rate is high, and the production efficiency and output rate are effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of the first special jigger of the present application;

[0025] Figure 2 It is a schematic view of the first special jigger of the present application in use;

[0026] Figure 3 It is a structural schematic view of the second special jigger of the present application;

[0027] Figure 4 It is a schematic view of the second special jigger of the present application in use. EMBODIMENTS

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] In the description of the invention, it should be pointed out that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the invention. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the invention, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the invention can be understood according to the specific circumstances.

[0031] Please refer to Figures 1-4 The present application provides a technical solution: in the processing technology of a turning prism, the processing requires a glass base plate, an isosceles right triangle body 3, an isosceles right triangular prism body 4, and a first special body 1 and a second special body 2.

[0032] In this embodiment, the glass base plate is circular in shape, and the size requirement is: Φ300mm.

[0033] In this embodiment, the processing requirement of the isosceles right triangle body 3 is: two right angle surfaces, chord surfaces and one side surface, angle 45°±30″, 90°±30″, aperture PV<1 / 4λ, surface finish 60-40.

[0034] In this embodiment, the processing requirement of the isosceles right triangular prism body 4 is: angle 90°45°±30″, tower difference <30″, length 80mm.

[0035] In this embodiment, the first special body 1 includes a first base 11, two isosceles right triangle pads 12, a square body 13, a square positioning block 14, two isosceles right triangle positioning blocks 15 are arranged on the first base 11.

[0036] First, the chord surfaces of the two isosceles right triangle pads 12 are fixed on the first base 11, and the 90° V-shaped groove formed between the two adjacent isosceles right triangle pads 12 is used to place the isosceles right triangle body 3,

[0037] In addition, fix a square supporting body 13 on the right side of the two isosceles right triangle supporting blocks 12, and fix one of the isosceles right triangle positioning blocks 15 on the front side of the two isosceles right triangle supporting blocks 12 to further limit the isosceles right triangle supporting body 3;

[0038] Finally, fix the square positioning block 14 on the square supporting body 13, and fix the other isosceles right triangle positioning block 15 on the right angle surface of one of the isosceles right triangle supporting blocks 12 to facilitate positioning when the turning prism is glued on the isosceles right triangle supporting body 3;

[0039] In the above embodiment, the use mode of the first special supporting die is as follows: place the isosceles right triangle supporting body 3 into the V-shaped groove composed of the two isosceles right triangle supporting blocks 12, at this time, the square supporting body 13 and one of the isosceles right triangle positioning blocks 15 limit the isosceles right triangle supporting body 3, then place the turning prism to be processed on the chord surface of the isosceles right triangle supporting body 3, then move the turning prism to be processed to be in contact with the square supporting body 13 and one of the isosceles right triangle positioning blocks 15 to realize positioning, at this time, the turning prism can be glued on the chord surface of the isosceles right triangle supporting body for processing, and the isosceles right triangle supporting body has strong versatility.

[0040] In the embodiment, the second special supporting die 2 comprises a second base 21, and the second base 21 is provided with a V-shaped groove composed of two isosceles right triangular prism supporting blocks 22, two square supporting blocks 23 with the same height, a rectangular supporting body 24, and a 45° positioning block 25;

[0041] Fix the right angle surfaces of the two isosceles right triangular prism supporting blocks 22 on the second base 21, and ensure that the two adjacent isosceles right triangular prism supporting blocks 22 form a 90° V-shaped groove for placing the isosceles right triangular prism supporting body 4;

[0042] Then fix the two square supporting blocks 23 on the two sides of the two isosceles right triangular prism supporting blocks 22 respectively, fix the rectangular supporting body 24 above the two square supporting blocks 23, and then fix a 45° positioning block 25 on the side wall of the rectangular supporting body 24;

[0043] In the above embodiment, the second special jigs are used as follows: the isosceles right triangular prism body 4 is placed in the 90° V-shaped groove formed by two isosceles right triangular prism blocks 22, and then the isosceles right triangular prism body 4 is pushed to move the end thereof to the rear side of the rectangular body 24, at this time, a to-be-processed corner cube is placed on the isosceles right triangular prism body at the rear side of the rectangular body 24, a worker observes from the front side of the rectangular body 24 to ensure that the to-be-processed corner cube is processed to have a right angle face which is parallel to the reference face of the rectangular body 24, and the processed 45° edge line is positioned on the inclined positioning block 25 to glue the to-be-processed corner cube on the isosceles right triangular prism body;

[0044] Then the isosceles right triangular prism body 4 is moved again, and the second to-be-processed corner cube is glued in the above manner, and three to-be-processed corner cubes can be glued on the isosceles right triangular prism body at the same time.

[0045] A processing technology of a corner cube, and the operation steps are as follows:

[0046] S1: according to the size requirements of product drawings, a rough grinding forming is performed to obtain a corner cube blank, all faces of the blank have a processing allowance of 0.4 mm, and the angle is ±10';

[0047] S2: a 417 glue is used to glue one non-polished face of the blank on a glass base plate, a right angle face parallel to the glass base plate is processed, and other non-processing faces are coated with a protective paint;

[0048] S3: the size and face type are processed according to the process requirements, the parallelism error is less than 0.005 mm in the range of Φ300 mm, the face type is controlled to be ±0.001 mm in the range of Φ300 mm, high-speed polishing is performed by using polyurethane, and then low-speed precision polishing is performed by using a pitch mold, after polishing, a plane interferometer is used to detect an optical circle, the optical circle and surface finish are processed according to the drawing requirements, and after polishing, the base plate is removed, the edge is reversed, and cleaning is performed;

[0049] S4: the right angle face of the polished blank is glued on the chord face of a single isosceles right triangular body 3 by using the first special jig 1, the isosceles right triangular body 3 is perpendicularly glued on the glass base plate by using the side face of the isosceles right triangular body 3, another right angle face is processed, and other non-processing faces are coated with a protective paint, and 40-50 pieces can be processed on the glass base plate;

[0050] S5: the size and face type are processed according to the process requirements, the parallelism error is less than 0.005 mm in the range of Φ300 mm, and the face type is controlled to be ±0.001 mm in the range of Φ300 mm, high-speed polishing is performed by using polyurethane, and then low-speed precision polishing is performed by using a pitch mold, after polishing, a plane interferometer is used to detect an optical circle, and the optical circle and surface finish are processed according to the drawing requirements;

[0051] S6: The isosceles right triangle body 3 is placed on the lower disc and turned over, and the right angle surface of the isosceles right triangle body 3 is glued on the glass bottom plate to process one 45° surface of the product, and the other non-processing surface is coated with protective paint;

[0052] S7: The size and surface type are processed according to the process requirements, the parallelism error is less than 0.005mm in the range of Φ300mm, the surface type is controlled to be ±0.001mm in the range of Φ300mm, the high-speed polishing is performed by using polyurethane, then the low-speed precision polishing is performed by using asphalt mold, the light circle is detected by using a plane interferometer after the polishing is completed, the light circle and the surface finish are processed according to the drawing requirements, the disc is lowered after the polishing is completed, the edge is reversed, and cleaning is performed;

[0053] S8: The second special body is used, the right angle surface of one processed blank is first glued on the isosceles right triangular prism body 4, the reference surface of the other right angle surface is glued on the coarse light circle of the second special body 2, and the total length of the product is controlled by using the processed 45° edge line, three products are glued on the isosceles right triangular prism body 4 through the above-mentioned mode, and finally the right angle surface of the body is glued on the glass bottom plate to form a disc to process the other 45° surface, and the other surfaces are coated with protective paint;

[0054] S9: The size and surface type are processed according to the process requirements, the parallelism error is less than 0.005mm in the range of Φ300mm, the surface type is controlled to be ±0.001mm in the range of Φ300mm, the high-speed polishing is performed by using polyurethane, then the low-speed precision polishing is performed by using asphalt mold, the light circle is detected by using a plane interferometer after the polishing is completed, the light circle and the surface finish are processed according to the drawing requirements, the disc is lowered after the polishing is completed, the edge is reversed, and cleaning is performed.

[0055] It is obvious to those skilled in the art that the application is not limited to the details of the above exemplary embodiments, and the application can be implemented in other specific forms without departing from the spirit or essential characteristics of the application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0056] Although the embodiments of the application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A machining process of a turning prism, characterized by, It comprises the following steps: S1: preparing processing tools, including: glass base plate, isosceles right triangle body (3), isosceles right triangular prism body (4) and first special mold (1), second special mold (2); S2: according to the size requirements of product drawing, rough grinding forming is carried out to obtain the rough casting of the steering prism, all the surfaces of the rough casting are left with 0.4mm machining allowance, and the angle is ±10'; S3: one of the non-polished surfaces of the rough casting is sealed on the glass base plate by 417 glue, the right angle surface parallel to the glass base plate is processed, and the other non-processing surface is coated with protective paint; S4: the size and surface type are precisely ground according to the process requirements, the high-speed polishing is first carried out by using polyurethane, then the low-speed precision polishing is carried out by using asphalt mold, the light circle is detected by using plane interferometer, the light circle and the surface finish are processed according to the drawing requirements, after the polishing is completed, the disc is lowered, the edge is reversed, and the cleaning is carried out; S5: the polished right angle surface is glued on the chord surface of the single isosceles right triangle body (3) by using the first special mold (1), the glass base plate is glued on the glass base plate by using the isosceles right triangle body (3) perpendicular to the chord surface, the other right angle surface is processed, and the other non-processing surface is coated with protective paint, one disc on the glass base plate can process 40-50 pieces; S6: the size and surface type are precisely ground according to the process requirements, the high-speed polishing is first carried out by using polyurethane, then the low-speed precision polishing is carried out by using asphalt mold, the light circle is detected after the polishing is completed, and the light circle and the surface finish are processed according to the drawing requirements; S7: the isosceles right triangle body (3) and the rough casting are lowered together, the disc is turned over, the right angle surface of the isosceles right triangle body (3) is glued on the glass base plate to process one of the 45° surfaces of the rough casting, and the other non-processing surface is coated with protective paint; S8: the size and surface type are precisely ground according to the process requirements, the high-speed polishing is first carried out by using polyurethane, then the low-speed precision polishing is carried out by using asphalt mold, the light circle is detected after the polishing is completed, and the light circle and the surface finish are processed according to the drawing requirements, after the polishing is completed, the disc is lowered, the edge is reversed, and the cleaning is carried out; S9: the second special mold is used, one of the right angle surfaces of the rough casting which has been processed is glued on the isosceles right triangular prism body (4), the other right angle surface is matched with the reference surface of the second special mold (2) to form a rough light circle, and the 45° edge line which has been processed is used for positioning to control the total length of the product, three products are glued on the isosceles right triangular prism body (4) through the above-mentioned mode, and finally the right angle surface of the body is glued on the glass base plate to form a disc to process the other 45° surface, and the other surface is coated with protective paint; S10: the size and surface type are precisely ground according to the process requirements, the high-speed polishing is first carried out by using polyurethane, then the low-speed precision polishing is carried out by using asphalt mold, the light circle is detected after the polishing is completed, and the light circle and the surface finish are processed according to the drawing requirements, after the polishing is completed, the disc is lowered, the edge is reversed, and the cleaning is carried out.

2. The machining process of a turning prism according to claim 1, characterized in that: The processing requirements of the external size of the isosceles right triangle body (3) are that the two right angle surfaces, the chord surface and one side surface have an angle of 45°±30'', 90°±30'', the light circle PV is less than 1 / 4λ, and the surface finish is 60-40.

3. The process for machining a turning prism according to claim 1, characterized in that: The processing requirements of the external size of the isosceles right triangular prism body (4) are that the angle is 90°45°±30'', the tower difference is less than 30'', and the length is 80mm.

4. The process for machining a turning prism according to claim 1, characterized in that: The first special back form (1) comprises a first base (11), two isosceles right triangle pads (12), a square back body (13), a square positioning block (14), two isosceles right triangle positioning blocks (15), the chord surface of the two isosceles right triangle pads (12) is fixed on the first base (11), and the two isosceles right triangle pads (12) are arranged as a 90° V-shaped groove, the square back body (13) is arranged on the right side of the V-shaped groove composed of the two isosceles right triangle pads (12), the square back body (13) is further provided with a square positioning block (14), one of the two isosceles right triangle positioning blocks (15) is arranged on the front side of the two isosceles right triangle pads (12), and the other isosceles right triangle positioning block (15) is arranged on the left side of the V-shaped groove composed of the isosceles right triangle pads (12).

5. The process for machining a turning prism according to claim 1, characterized in that: The second special back form (2) comprises a second base (21), two isosceles right triangular prism pads (22), two square equal-height supporting blocks (23), a rectangular back body (24) with a surface brightening and 90°±30", and a 45° positioning block (25), the right angle surface of the two isosceles right triangular prism pads (22) is fixed on the second base (21), the two isosceles right triangular prism pads (22) are arranged as a 90° V-shaped groove, the two square supporting blocks (23) are arranged on the front and back sides of the two isosceles right triangular prism pads (22) respectively, the rectangular back body (24) is arranged above the two square supporting blocks (23), and the 45° positioning block (25) is fixed on the side surface of the rectangular back body (24).

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