Milling and grinding forming auxiliary device for super-hemisphere cover

Abstract

The utility model discloses a kind of super-hemisphere cover milling and grinding forming auxiliary devices, it includes base, base body, upper cover;The periphery edge of base is equipped with multiple U-shaped grooves of symmetrical arrangement, and multiple U-shaped grooves are evenly arranged;Base body includes lower cylindrical base body, upper cylindrical base body connected with lower cylindrical base body;Lower cylindrical base body is arranged on base, and its diameter is smaller than the diameter of base and upper cylindrical base body;Half-spherical sink cavity is equipped in base body;Multiple lower glue pouring grooves are evenly distributed in the surface of half-spherical sink cavity periphery;Upper cover is connected with lower cylindrical base body;Upper cover is equipped with spherical crown type cavity, and the spherical crown type cavity and half-spherical sink cavity in base body form super-hemisphere sink cavity;Multiple upper glue pouring grooves are evenly distributed in the surface of spherical crown type cavity periphery;The upper glue pouring groove and lower glue pouring groove in base body one-to-one correspond.The utility model can be well fixed to super-hemisphere cover blank, and when milling and grinding to the inner surface of super-hemisphere cover blank, can avoid causing damage to super-hemisphere cover blank.

Description

Technical Field

[0001] This utility model relates to the field of milling and forming technology of hemispherical covers, and specifically to an auxiliary device for milling and forming hemispherical covers. Background Technology

[0002] An optical dome is an optical window with two concentric spherical surfaces. It serves not only as a barrier isolating the internal system from the external environment, protecting the internal equipment structure, isolating it from harsh external environments (such as high temperatures, rain, snow, and hail), enhancing the equipment's environmental adaptability, and extending its lifespan, but also as a window for observing the external environment. A super-hemispherical dome is a type of optical dome that refers to a transparent dome whose geometry exceeds that of a standard hemisphere (>180°).

[0003] Hemispherical domes are typically made of optical ceramic materials and formed through methods such as molding, hot isostatic pressing, and reaction sintering. The inner and outer surfaces of the formed hemispherical dome blank are usually uneven, making them difficult to clamp, fix, level, and center. Therefore, milling is required on both the inner and outer surfaces of the dome blank. When milling the inner surface of the dome blank, it is necessary to fix it in place. However, existing dome blank fixing devices are unstable during milling and may damage the dome blank. Therefore, we urgently need an auxiliary device for milling and forming hemispherical domes to complete the milling and forming process. Utility Model Content

[0004] The main objective of this invention is to provide an auxiliary device for milling and forming a hemispherical cover. This auxiliary device can effectively fix the hemispherical cover blank and avoid damage to the hemispherical cover blank when milling the inner surface of the hemispherical cover blank.

[0005] The technical solution adopted in this utility model is: A milling and forming auxiliary device for a super-hemispherical cover includes a base, a substrate, and a top cover; The base has multiple U-shaped grooves symmetrically arranged around its four edges, and the multiple U-shaped grooves are evenly distributed; T-bolts are used to fix the base to the worktable through the U-shaped grooves; The substrate includes a lower cylindrical substrate and an upper cylindrical substrate connected to the lower cylindrical substrate; the lower cylindrical substrate is installed on the base, and its diameter is smaller than the diameter of the base and the upper cylindrical substrate; a hemispherical cavity is provided in the substrate, and the diameter of the hemispherical cavity is larger than the diameter of the super hemispherical cover blank; multiple lower glue-filling grooves are evenly distributed circumferentially on the surface of the hemispherical cavity. The upper cover is connected to the lower cylindrical base and has a cylindrical structure. The upper cover has a spherical crown-shaped cavity, which, together with the hemispherical recess in the base, forms a hemispherical recess for placing the hemispherical cover blank. The diameter of the hemispherical recess is larger than the diameter of the hemispherical cover blank, ensuring that the part (hemispherical cover blank) can be placed into the cavity and that there is sufficient adjustment space. Multiple upper glue-filling grooves are evenly distributed circumferentially on the surface of the spherical crown-shaped cavity. Each upper glue-filling groove corresponds to a lower glue-filling groove in the base.

[0006] According to the above scheme, there are 8 U-shaped grooves. The width of the U-shaped grooves is greater than the width of the worktable groove, so as to leave enough margin for subsequent adjustment of the center of the parts in the XY direction, so as to better adjust the entire device in the XY direction.

[0007] According to the above scheme, the middle area of ​​the bottom of the base is a circular recess. This structure reduces the contact area between the bottom plane of the base and the worktable, and reduces the leveling error caused by processing error, workpiece shape error and surface dirt.

[0008] According to the above scheme, the lower cylindrical base, the upper cylindrical base, and the base are integrally formed to facilitate manufacturing and ensure the strength of the device.

[0009] According to the above scheme, the lower cylindrical base is provided with an annular groove, which is connected to the lower glue-filling groove to facilitate the uniform flow of adhesive.

[0010] According to the above scheme, the upper cylindrical base is uniformly provided with positioning threaded holes in the circumferential direction. The positioning threaded holes are connected to the hemispherical cavity. After the fixing screw passes through the positioning threaded holes, it abuts against the super hemispherical cover blank to ensure that the super hemispherical cover blank will not shift significantly during the cooling and solidification of the adhesive.

[0011] According to the above scheme, handles are provided on both sides of the upper cylindrical base for easy movement. Preferably, the handles are made of 410 stainless steel, which has high strength and good load-bearing capacity.

[0012] According to the above scheme, the handle mounting area on the upper cylindrical base is a flat surface to reduce the difficulty of installation and machining of the contact surface between the handle and the base. Four threaded holes are distributed on the handle, and screws are used to fix the handle to the flat surface of the base through these holes.

[0013] According to the above scheme, the cross-section of the upper and lower glue-filling tanks is semi-circular to guide the flow of adhesive and facilitate the filling of adhesive.

[0014] According to the above scheme, the upper cover is provided with a recessed fixing hole, which can prevent the fixing bolt from protruding and interfering with the tool path; the base is provided with a fixing threaded hole that matches the recessed fixing hole; the fixing bolt passes through the recessed fixing hole and the fixing threaded hole to connect the upper cover and the base.

[0015] Preferably, the recessed fixing holes are evenly spaced along the top cover and the fixing threaded holes are evenly spaced along the circumference of the base; the recessed fixing holes on the top cover can prevent the fixing screws from protruding and causing interference.

[0016] According to the above scheme, the base, body, and top cover are made of low-density hard aluminum material, which ensures strength, is easy to process, reduces the weight of the device, and lowers the risk of handling.

[0017] According to the above scheme, the upper cover is provided with positioning holes in all directions, each positioning hole corresponds to a fixing block, and the fixing block is provided with a sliding groove. After the positioning screw passes through the sliding groove and the positioning hole, it fixes the fixing block, thereby fixing the super hemispherical cover blank.

[0018] After the adhesive is heated and melted into a liquid state, it is poured into the hemispherical cavity along the glue-filling groove, allowing the adhesive to evenly fill the gaps between the hemispherical cover blank, the substrate, and the top cover. The cooled adhesive provides good support for the hemispherical cover blank. After the inner surface of the hemispherical cover blank is machined, the adhesive is heated to separate the hemispherical cover blank from the auxiliary device.

[0019] The beneficial effects of this utility model are as follows: Adhesive is injected into the gaps between the hemispherical cover blank, the substrate, and the top cover through the upper and lower glue injection tanks, thereby ensuring proper clamping and fixation of the hemispherical cover blank. By setting multiple symmetrical U-shaped grooves around the four edges of the base, the XY direction of the entire device can be adjusted, reducing the difficulty of centering the super-hemispherical cover blank in the XY direction. The lower cylindrical base and the upper cylindrical base are cylindrical structures with different diameters. The diameter of the lower cylindrical base is smaller than that of the upper cylindrical base. This is to reduce the overall weight of the device and facilitate subsequent handling, and to leave enough operating space for the T-bolt fixing base. By designing the inner cavity as a super-hemispherical recess, compared to a cylindrical surface, not only is the weight reduced, but the distance between the outer spherical surface of the blank and the device is also shortened, which improves the adhesion of the blank and prevents the blank from shifting during processing. Multiple glue-filling grooves not only allow the adhesive to quickly and evenly fill the internal cavity of the device, ensuring that there is no cavity between the hemispherical cover blank and the device, but also allow the adhesive to fully support the parts, reducing the risk of the hemispherical cover blank cracking due to local stress during milling and avoiding damage to the hemispherical cover blank. At the same time, the glue-filling grooves can also play a certain role in lateral resistance, reducing the risk of displacement of parts during processing. This device is suitable for forming hemispherical cover parts using a five-axis precision engraving machine or other milling equipment, and can complete the clamping, fixing, leveling and centering of the cover blank. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view schematic diagram of the auxiliary device for milling and forming the super hemispherical cover in Example 1; Figure 2 This is a top view of the auxiliary device for milling and forming the hemispherical cover in Example 1; Figure 3 This is a cross-sectional schematic diagram of the milling and forming auxiliary device for the hemispherical cover in Example 1; Figure 4 This is a front view schematic diagram of the auxiliary device for milling and forming the super hemispherical cover in Example 4; Figure 5 This is a front view schematic diagram of the auxiliary device for milling and forming the super hemispherical cover in Example 5; Figure 6 This is a top view of the auxiliary device for milling and forming the hemispherical cover in Example 5 (without the fixing block). Figure 7 This is a top view of the auxiliary device for milling and forming the hemispherical cover in Example 5 (with fixing block). Figure 8 This is a cross-sectional schematic diagram of the milling and forming auxiliary device for the hemispherical cover in Example 5; In the diagram: 1. Base, 2. Substrate, 2.1. Lower cylindrical substrate, 2.2. Upper cylindrical substrate, 3. Top cover, 4. Handle, 5. U-shaped groove, 6. Hemispherical recess, 7. Lower glue-filling groove, 8. Spherical crown-shaped cavity, 9. Upper glue-filling groove, 10. Circular recess, 11. Annular groove, 12. Positioning threaded hole, 13. Recessed fixing hole, 14. Fixing threaded hole, 15. Positioning hole, 16. Fixing block, 17. Slide groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] Example 1 See Figures 1-3 A milling and forming auxiliary device for a super hemispherical cover includes a base 1, a base body 2, and an upper cover 3. Eight U-shaped grooves 5 are evenly distributed around the perimeter of the base 1; T-bolts are used to fix the base 1 to the worktable through the U-shaped grooves 5. In this embodiment, the width of the U-shaped groove 5 is greater than the width of the worktable groove, leaving sufficient margin for subsequent adjustment of the XY direction center of the parts, so as to better adjust and center the entire device in the XY direction. In order to reduce the contact area between the bottom plane of the base 1 and the worktable, and reduce the leveling error caused by machining error, workpiece shape error and surface dirt, the middle area of ​​the bottom of the base 1 can be designed as a circular recess 10.

[0024] The base 2 includes a lower cylindrical base 2.1 and an upper cylindrical base 2.2 connected to the lower cylindrical base 2.1. The lower cylindrical base 2.1 is mounted on the base 1, and its diameter is smaller than that of the base 1 and the upper cylindrical base 2.2. The base 2 has a hemispherical cavity 6, the diameter of which is larger than that of the super-hemispherical cover blank, to ensure that the part (super-hemispherical cover blank) can be placed into the hemispherical cavity 6 with sufficient adjustment margin; multiple lower glue-filling grooves 7 with semi-circular cross-sections are evenly distributed circumferentially on the surface of the hemispherical cavity 6.

[0025] The upper cover 3 is a cylindrical structure with evenly spaced recessed fixing holes 13 on its circumference. The upper cylindrical base 2.2 has threaded fixing holes 14 that match the recessed fixing holes 13. Fixing bolts pass through the recessed fixing holes 13 and the threaded fixing holes 14 to connect the upper cover 3 and the base 2. The upper cover 3 has a spherical crown-shaped cavity 8, which, together with the hemispherical recess 6 in the base 2, forms a hemispherical recess for placing the hemispherical cover blank. The diameter of the hemispherical recess is larger than the diameter of the hemispherical cover blank, ensuring that the part (hemispherical cover blank) can be placed inside the cavity with sufficient adjustment space. Multiple upper glue-filling grooves 9 with semi-circular cross-sections are evenly distributed circumferentially on the surface of the spherical crown-shaped cavity 8; these upper glue-filling grooves 9 correspond one-to-one with the lower glue-filling grooves 7 in the base 2.

[0026] To facilitate the uniform flow of adhesive into the cavity, an annular groove 11 can be provided inside the lower cylindrical base 2.1, which is connected to the lower glue-filling groove 7.

[0027] In this embodiment, the base 1, the substrate 2, and the top cover 3 are made of low-density hard aluminum. To prevent adhesive from flowing out from the connection between the top cover 3 and the substrate 2, a sealing structure can be provided at the connection; alternatively, high-temperature tape can be wrapped around the connection. The sealing structure can be a sealing ring, a raised face, or other conventional sealing structures.

[0028] Example 2 Unlike Example 1, the lower cylindrical base 2.1, the upper cylindrical base 2.1, and the base 1 are integrally formed.

[0029] Example 3 Unlike Embodiment 2, the upper cylindrical base 2.2 has handles 4 made of 410 stainless steel on both sides. For ease of installation, the mounting area of ​​the handles 4 on the upper cylindrical base 2.2 can be designed as a flat surface. Four threaded holes are distributed on the handles 4, and screws are used to fix the handles 4 to the flat surface of the base 2 through the threaded holes.

[0030] Example 4 See Figure 4 Unlike Embodiment 3, the upper cylindrical base 2.2 has circumferentially evenly arranged positioning threaded holes 12, which are connected to the hemispherical cavity 6. The fixing screw passes through the positioning threaded hole 12 and abuts against the super-hemispherical cover blank to ensure that the super-hemispherical cover blank will not shift significantly during the cooling and solidification of the adhesive. In use, to prevent the adhesive in the hemispherical cavity 6 from flowing out along the positioning threaded hole 12, a sealing ring is provided in the positioning threaded hole 12.

[0031] The operation steps are as follows: 1. Place the device, adhesive, and parts (hemispherical cover blank) on a hot plate for preheating. After the adhesive melts, pour some adhesive into the hemispherical cavity and place the parts into the hemispherical cavity (the upper end of the parts should protrude from the hemispherical cavity). Observe the adhesive filling status and continue to pour adhesive along the glue pouring groove as needed until the adhesive fills the cavity evenly. 2. Place the device on the rotating platform, and use the dial indicator to measure the top plane and upper side of the part respectively. Rotate the device and adjust the position of the part until the dial indicator has the smallest range of fluctuation. 3. After the fixing screw passes through the positioning threaded hole 12, it abuts against the super-hemispherical cover blank, so that the fixing screw keeps the part basically stationary. After the device cools down to a certain temperature, use the handle to move the device to the worktable of the processing equipment, and use T-bolts to lock the device. 4. Use a dial indicator to measure the top plane and upper side of the part respectively. Rotate the device and adjust its position to make the part coaxial with the center of the worktable. If there is a slight offset on the top end face of the part, the displacement of the part in the XY direction can be finely adjusted by the U-shaped groove, or / and the part can be adjusted by the fixing screw. 5. After the device has cooled and the adhesive has solidified to provide good support, remove the fixing screw and use a dial indicator to measure the top plane and side of the part again to ensure that the part is level and center has not changed, thus ensuring the machining positioning accuracy. 6. Mill the inner surface of the part using a milling tool; 7. After milling, use a heating device to melt the adhesive and remove the part.

[0032] Example 5 See Figures 5-8Unlike Embodiment 3, the upper cover 3 has circumferentially arranged positioning holes 15, each corresponding to a fixing block 16. The fixing block 16 has a sliding groove 17. After the positioning screw passes through the sliding groove 17 and the positioning hole 15, it fixes the fixing block 16, thereby securing the hemispherical cover blank. When it is not necessary to fix the hemispherical cover blank, the positioning screw can be loosened and the fixing block 16 removed. Alternatively, the sliding groove 17 can be used to prevent the fixing block 16 from contacting the hemispherical cover blank. By moving the sliding groove 17 on the fixing block 16, fixing hemispherical cover blanks of different diameters can be achieved. The corresponding fixing block can also be installed according to the outer dimensions of the contact surface with the hemispherical cover blank.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An auxiliary device for milling and forming a super-hemispherical cover, characterized in that: Includes base, body, and top cover; The base has multiple U-shaped grooves symmetrically arranged around its four edges, and the multiple U-shaped grooves are evenly distributed; T-bolts are used to fix the base to the worktable through the U-shaped grooves; The substrate includes a lower cylindrical substrate and an upper cylindrical substrate connected to the lower cylindrical substrate; the lower cylindrical substrate is installed on the base, and its diameter is smaller than the diameter of the base and the upper cylindrical substrate; a hemispherical cavity is provided in the substrate, and the diameter of the hemispherical cavity is larger than the diameter of the super hemispherical cover blank; multiple lower glue-filling grooves are evenly distributed circumferentially on the surface of the hemispherical cavity. The upper cover is connected to the lower cylindrical base and has a cylindrical structure; the upper cover has a spherical cavity, which forms a super-hemispherical cavity with the hemispherical cavity in the base to place the super-hemispherical cover blank; multiple upper glue-filling grooves are evenly distributed circumferentially on the surface of the spherical cavity; the upper glue-filling grooves correspond one-to-one with the lower glue-filling grooves in the base.

2. The auxiliary device for milling and forming a super-hemispherical dome according to claim 1, characterized in that: The bottom center area of ​​the base is a circular recess.

3. The auxiliary device for milling and forming a super-hemispherical cover according to claim 1, characterized in that: The lower cylindrical base, upper cylindrical base, and base are integrally formed.

4. The auxiliary device for milling and forming a super-hemispherical cover according to claim 1, characterized in that: The lower cylindrical base is provided with an annular groove, which is connected to the lower glue-filling groove.

5. The auxiliary device for milling and forming a super-hemispherical cover according to claim 1, characterized in that: The upper cylindrical base is provided with a positioning threaded hole, which is connected to the hemispherical cavity; the fixing screw passes through the positioning threaded hole and abuts against the super-hemispherical cover blank.

6. The auxiliary device for milling and forming a super-hemispherical cover according to claim 1 or 5, characterized in that: The upper cylindrical base is provided with handles on both sides.

7. The auxiliary device for milling and forming a super-hemispherical cover according to claim 6, characterized in that: The handle mounting area on the upper cylindrical base is a flat surface.

8. The hemispherical cover milling and forming auxiliary device according to claim 1, characterized in that: The upper and lower glue-filling tanks have semi-circular cross-sections.

9. The hemispherical cover milling and forming auxiliary device according to claim 1, characterized in that: The upper cover is provided with a recessed fixing hole, and the base is provided with a fixing threaded hole that matches the recessed fixing hole; the fixing bolt passes through the recessed fixing hole and the fixing threaded hole to connect the upper cover and the base.

10. The hemispherical cover milling and forming auxiliary device according to claim 1, characterized in that: The upper cover is provided with positioning holes in all directions. Each positioning hole corresponds to a fixing block. The fixing block is provided with a sliding groove. After the positioning screw passes through the sliding groove and the positioning hole, it fixes the fixing block, thereby fixing the super-hemispherical cover blank.

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