CN112068274B - Glue head shape-preserving device and method for bonding precision optical machine system - Google Patents
Glue head shape-preserving device and method for bonding precision optical machine system Download PDFInfo
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- CN112068274B CN112068274B CN202010936114.2A CN202010936114A CN112068274B CN 112068274 B CN112068274 B CN 112068274B CN 202010936114 A CN202010936114 A CN 202010936114A CN 112068274 B CN112068274 B CN 112068274B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
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Abstract
The invention discloses a glue head shape-preserving device and method for bonding a precision optical machine system. The optical parts are placed in the mirror frame, the optical axis of the optical parts is overlapped with the cylindrical axis of the mirror frame, the shape-preserving tool is tightly matched with the glue filling hole in the mirror frame, the end face of the shape-preserving tool is contacted with the cylindrical surface of the optical parts, the adhesive is filled into the shape-preserving tool, and the plug is installed on one side, far away from the optical parts, of the shape-preserving tool and is tightly matched with the shape-preserving tool. When the optical machine is used for bonding and assembling, after the adhesive with fluidity is injected through the shape-preserving tool, the mounting plug slightly extrudes the adhesive to restrain the shape of the adhesive head in the curing process, so that the bonding of an optical part and the mirror frame is realized. The invention reduces the risk that the shape of the glue head is difficult to control because of larger fluidity before the adhesive is cured, improves the controllability of the surface shape precision of the low-stress bonding of a precision optical-mechanical system, and belongs to the field of design, adjustment and installation of precision optical-mechanical systems.
Description
Technical Field
The invention belongs to the technical field of precision optical machine design and assembly, relates to a precision optical machine system bonding tool and a precision optical machine system bonding method, and particularly relates to a glue head shape-preserving device and a glue head shape-preserving method for precision optical machine system bonding.
Background
The Bonding technology (Bonding Technique) of the precision optical machine system is to mount the optical parts on the frame by using adhesive, and the system can effectively inhibit the action transmission between the mechanical supporting part and the optical imaging part under the action of temperature, impact and vibration load due to the low elastic modulus characteristic of the adhesive (such as the elastic modulus of common RTV silicon rubber is 2.2GPa, and the elastic modulus of aluminum alloy material and fused quartz is 70.1GPa and 73GPa respectively), thereby reducing the stress deformation of the optical imaging part and simplifying the system structure. Therefore, the bonding technique is favored in terms of its assembly characteristics that can be realized simply, compactly, uniformly distributed stress, and highly environmentally friendly.
In designing an optical-mechanical system using a bonding technique, stress caused by different linear expansion coefficients of mechanical parts and optical parts is taken into full consideration, and particularly, when the optical-mechanical system is applied to an optical-mechanical system with a wide temperature range (the temperature is between-45 ℃ and 60 ℃), a sufficient gap, for example, a gap between 0.05mm and 0.5mm, needs to be reserved in the radial direction of the optical parts and the lens frame parts. Therefore, when glue is injected and bonded between the optical part and the frame part, the bonding area and the shape of the bonding area are affected due to certain fluidity of the adhesive, so that the actual bonding is not matched with the designed bonding head, and the surface shape quality of the optical part is seriously affected. At present, the mode of smearing grease is generally adopted, and the grease is smeared at the position where the optical part and the picture frame are not needed to be adhered to prevent the area from being glued, but the method is difficult to restrain the shape of the solidified glue due to the flowing characteristic of the glue.
Disclosure of Invention
Objects of the invention
The purpose of the invention is: the utility model provides a glue head shape-preserving device and method for bonding a precision optical machine system, which solves the problems existing in the bonding technology of the precision optical machine system at present.
(II) technical scheme
In order to solve the technical problem, the invention provides a glue head shape-preserving device for bonding a precision optical machine system, which comprises a main mirror frame 1, an optical part 2, an adhesive 3, a shape-preserving tool 4 and a plug 5; the optical parts 2 are placed in the main lens frame 1, and the optical axis of the optical parts 2 is superposed with the central axis of the cylindrical main lens frame 1; the main mirror frame 1 is provided with glue injection holes, the shape-preserving tool 4 is tightly matched with the glue injection holes, the inner side end face of the shape-preserving tool 4 is contacted with the outer peripheral face of the optical part 2, the adhesive 3 is injected into the shape-preserving tool 4, the plug 5 is installed at the outer side end part, far away from the optical part 2, of the shape-preserving tool 4 and is tightly matched with the shape-preserving tool 4, and the inner side end face of the plug 5 is fully contacted with the adhesive 3.
The outer peripheral surface of the optical component 2 is a cylindrical surface, and the inner side end face of the shape-preserving tool 4 is in matched contact with the cylindrical surface.
The glue injection holes are formed along the radial direction of the main mirror frame 1, and the glue injection holes are uniformly distributed on the side wall of the main mirror frame 1.
The shape-preserving tools 4 are arranged in the corresponding main glue holes respectively, and the length of each shape-preserving tool 4 is larger than the depth of each glue injection hole.
The shape of the shape-preserving tool 4 is tubular, the shape-preserving tool 4 extends into the part in the glue injection hole, and the side wall of the shape-preserving tool 4 is hollowed out.
The shape-preserving tool 4 is made of polytetrafluoroethylene materials with high and low temperature resistance ranging from minus 45 ℃ to 60 ℃.
Wherein the thickness of the shape-preserving tool 4 is 0.1 mm-0.5 mm.
The thickness of the inner side end face of the shape-preserving tool 4 and the inner side edge of the hollow part is larger than the unilateral gap between the optical part 2 and the main mirror frame 1, so that the adhesive 3 does not flow out from the gap between the optical part 2 and the main mirror frame 1 after being injected.
The center of the plug 5 is a conical exhaust hole, and the outer cylindrical surface of the plug 5 is tightly matched with the inner cylindrical hole of the shape-preserving tool 4.
The invention also provides a glue head shape preserving method based on the glue head shape preserving device for bonding the precision optical machine system, when optical precision bonding is carried out, the adhesive 3 is injected at a constant speed from the end of the optical part 2 through the shape preserving tool 4, the adhesive 3 is stopped being injected when the shape preserving tool 4 is filled with the adhesive 3, the end cap 5 is arranged on one side of the shape preserving tool 4 away from the optical part 2, and the end face of the end cap 5 is fully contacted with the adhesive 3; in the process of curing the adhesive head 3, the shape-preserving tool 4 restrains the shape of the adhesive head 3, prevents the adhesive 3 from entering a gap between the optical part 2 and the main mirror frame 1 due to flowability to influence the surface shape precision of the optical part 2, cuts off all mechanisms exposed out of the outer cylindrical surface of the main mirror frame 1 after the adhesive 3 is completely cured, finally realizes the controllable bonding of the optical part 2 and the main mirror frame 1, and ensures the surface shape precision of the bonded optical part 2.
(III) advantageous effects
According to the glue head shape-preserving device and method for bonding the precision optical machine system, the hollow shape-preserving tool is used, so that constraint is formed in a gap between the optical part and the mirror frame, and the shape of injected glue is controllable; through the hollow design of the shape-preserving tool, the adhesive can be ensured to be fully contacted with the picture frame, and the bonding strength is ensured; the shape-preserving tool is made of polytetrafluoroethylene material with a low Young modulus, so that the influence of the shape-preserving tool on the surface shape of the optical part under the action of a wide temperature range is reduced; the plug adopts the design mode with the taper hole, prevents the flowing of the adhesive, plays the role of exhausting, and ensures the bonding strength. The controllability of the shape of the rubber head can be effectively improved by the device, the risk of uncontrolled optical surface shape change is reduced, the operability of the installation and debugging of the precise optical system is improved, and the installation and debugging precision is ensured.
Drawings
FIG. 1 is a cross-sectional view of a glue head conformal device for bonding of a precision optical machine system according to the present invention.
FIG. 2 is a three-dimensional view of a shape-preserving tool of the glue head shape-preserving device of the invention.
FIG. 3 is a three-dimensional view of the plug of the glue head shape-preserving device of the invention.
FIG. 4 is a cross-sectional view of the optical machine structure after the bonding and curing of the present invention are completed.
Wherein: 1-main mirror frame, 2-optical part, 3-adhesive, 4-shape-preserving tool and 5-plug.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
As shown in figure 1, the glue head shape-preserving device for bonding a precision optical machine system comprises a main mirror frame 1, an optical part 2, an adhesive 3, a shape-preserving tool 4 and a plug 5; the optical component 2 is placed in the main mirror frame 1, and the optical axis of the optical component 2 is superposed with the central axis of the cylindrical main mirror frame 1; the main mirror frame 1 is provided with glue injection holes, the shape-preserving tool 4 is tightly matched with the glue injection holes, the inner side end face of the shape-preserving tool 4 is contacted with the outer peripheral face of the optical part 2, the adhesive 3 is injected into the shape-preserving tool 4, the plug 5 is installed at the outer side end part, far away from the optical part 2, of the shape-preserving tool 4 and is tightly matched with the shape-preserving tool 4, and the inner side end face of the plug 5 is fully contacted with the adhesive 3.
The outer peripheral surface of the optical part 2 is a cylindrical surface, and the end surface of the inner side of the shape-preserving tool 4 is in matched contact with the cylindrical surface.
The glue injection holes are formed along the radial direction of the main mirror frame 1, and the glue injection holes are uniformly distributed on the side wall of the main mirror frame 1. The shape-preserving tools 4 are arranged in the corresponding main glue holes respectively, and the length of each shape-preserving tool 4 is larger than the depth of each glue injection hole.
FIG. 2 is a three-dimensional view of a shape-preserving tool 4 of the glue head shape-preserving device, wherein the shape-preserving tool 4 is made of a polytetrafluoroethylene material with high and low temperature resistance ranging from-45 ℃ to 60 ℃, is tubular and has a thin wall thickness ranging from 0.1mm to 0.5 mm. The part of the shape-preserving tool 4 extending into the glue injection hole is hollowed out on the side wall, so that the adhesive 3 can be fully contacted with the main mirror frame 1 after being injected; in addition, the contact end face of the shape-preserving tool 4 and the optical part 2 is processed to be close to the outer cylindrical face of the optical part 2, the thickness of the left side end face of the shape-preserving tool 4 and the left edge of the hollow part is larger than the unilateral gap between the optical part 2 and the main lens frame 1, and the adhesive 3 is prevented from flowing out of the gap between the optical part 2 and the main lens frame 1 after being injected, so that the shape of the adhesive head is controllable after the adhesive 3 is cured.
FIG. 3 is a three-dimensional view of a plug 5 of the glue head shape-preserving device of the invention, the center of the plug 5 is a taper-shaped exhaust hole, and the outer cylindrical surface of the plug 5 is tightly matched with the inner cylindrical hole of the shape-preserving tool 4.
FIG. 4 is a cross-sectional view of the optical machine structure after the bonding and curing of the present invention are completed. When optical precision bonding is carried out, the adhesive 3 is injected into the end of the shape-preserving tool 4 far from the optical part 2 at a constant speed to prevent bubbles from generating, the injection of the adhesive 3 is stopped when the shape-preserving tool 4 is filled with the adhesive 3, and the end face of the plug 5 is ensured to be fully contacted with the adhesive 3 by installing the plug 5 at the side of the shape-preserving tool 4 far from the optical part 2; in the process of curing the adhesive head 3, the shape-preserving tool 4 restrains the shape of the adhesive head 3, prevents the adhesive 3 from entering a gap between the optical part 2 and the main mirror frame 1 due to flowability to influence the surface shape precision of the optical part 2, cuts off all mechanisms exposed out of the outer cylindrical surface of the main mirror frame 1 after the adhesive 3 is completely cured, finally realizes the controllable bonding of the optical part 2 and the main mirror frame 1, and ensures the surface shape precision of the bonded optical part 2.
According to the technical scheme, the shape-preserving device disclosed by the invention uses the hollowed-out shape-preserving tool to ensure the adhesive strength while shaping the adhesive, and the shape-preserving tool adopts the polytetrafluoroethylene material with lower Young modulus to reduce the influence of the shape-preserving tool on the surface shape of the optical part under the action of a wide temperature range; the plug adopts a design mode with a tapered hole, prevents the flowing of the adhesive, plays a role in exhausting air and ensures the bonding strength; by means of the device, the controllability of the shape of the rubber head can be effectively improved, and the risk of uncontrolled optical surface shape change is reduced.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (2)
1. A glue head shape-preserving device for bonding a precision optical machine system is characterized by comprising a main mirror frame (1), an optical part (2), an adhesive (3), a shape-preserving tool (4) and a plug (5); the optical parts (2) are placed in the main lens frame (1), and the optical axis of the optical parts (2) is superposed with the central axis of the cylindrical main lens frame (1); the main mirror frame (1) is provided with a glue injection hole, the shape-preserving tool (4) is tightly matched with the glue injection hole, the inner side end face of the shape-preserving tool (4) is contacted with the outer peripheral face of the optical part (2), the adhesive (3) is injected into the shape-preserving tool (4), the plug (5) is installed at the outer side end of the shape-preserving tool (4) far away from the optical part (2) and is tightly matched with the shape-preserving tool (4), and the inner side end face of the plug (5) is fully contacted with the adhesive (3);
the outer peripheral surface of the optical part (2) is a cylindrical surface, and the end surface of the inner side of the shape-preserving tool (4) is matched and contacted with the cylindrical surface;
the glue injection holes are formed along the radial direction of the main mirror frame (1), and a plurality of glue injection holes are uniformly distributed on the side wall of the main mirror frame (1);
a plurality of shape-preserving tools (4) are respectively arranged in the corresponding glue injection holes, and the length of each shape-preserving tool (4) is greater than the depth of each glue injection hole;
the shape of the shape-preserving tool (4) is tubular, the part of the shape-preserving tool (4) extending into the glue injection hole is hollowed out;
the shape-preserving tool (4) is made of a polytetrafluoroethylene material with high and low temperature resistance ranging from minus 45 ℃ to 60 ℃;
the wall thickness of the shape-preserving tool (4) is 0.1 mm-0.5 mm;
the thickness of the end face of the inner side of the shape-preserving tool (4) and the edge of the inner side of the hollowed-out part is larger than the unilateral gap between the optical part (2) and the main mirror frame (1), so that the adhesive (3) does not flow out from the gap between the optical part (2) and the main mirror frame (1) after being injected;
the center of the plug (5) is a conical exhaust hole, and the outer cylindrical surface of the plug (5) is tightly matched with the inner cylindrical hole of the shape-preserving tool (4).
2. The glue head shape keeping method of the glue head shape keeping device for the bonding of the precision optical machine system according to claim 1, characterized in that during the optical precision bonding, the adhesive (3) is injected at a constant speed through the shape keeping tool (4) far away from the optical part (2), the injection of the adhesive (3) is stopped when the shape keeping tool (4) is filled with the adhesive (3), a plug (5) is installed on one side of the shape keeping tool (4) far away from the optical part (2), and the end face of the plug (5) is in full contact with the adhesive (3); in the process of curing the adhesive head of the adhesive (3), the shape of the adhesive head of the adhesive (3) is restrained by the shape-preserving tool (4), the adhesive (3) is prevented from entering a gap between the optical part (2) and the main mirror frame (1) due to flowability to influence the surface shape precision of the optical part (2), all mechanisms exposed out of the outer cylindrical surface of the main mirror frame (1) are cut after the adhesive (3) is completely cured, the controllable bonding of the optical part (2) and the main mirror frame (1) is finally realized, and the surface shape precision of the bonded optical part (2) is ensured.
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