Optical material positioning tool

Abstract

The application relates to the field of optical machining clamping tools, and provides an optical material positioning tool, which comprises a base, a workbench arranged on the base and a centering assembly; the base is provided with a vacuum channel; the workbench is provided with an adsorption cavity with an open upper end face; the adsorption cavity is communicated with the vacuum channel; the centering assembly comprises first and second positioning blocks used for clamping a workpiece; the first and second positioning blocks are oppositely arranged on the two sides of the workbench and used for abutting against the workpiece placed on the workbench. The tool has the advantages of improved clamping efficiency and stability, thereby improving the production efficiency and quality of products.

Description

Technical Field

[0001] This application relates to the field of optical processing fixtures and tooling, specifically to an optical material positioning fixture. Background Technology

[0002] Currently, the main clamping processes for polygonal optical components in CNC machining are bonding and vacuum adsorption. Both methods have drawbacks in practical applications. Bonding requires a long time to heat the tooling and material before bonding, followed by cooling, resulting in long clamping cycles and low efficiency. Vacuum adsorption, on the other hand, suffers from insufficient adsorption stability. Unstable material adsorption can lead to workpiece displacement during machining, resulting in insufficient precision, and even sudden gas interruption causing material to fly out. Furthermore, each clamping requires material straightening, further reducing efficiency. For example, CN219967737U discloses a vacuum adsorption fixture suitable for ultra-precision optical machining, including a base, a vacuum chuck, and a vacuum generator. The mirror blank is adsorbed and fixed on the upper surface of the vacuum chuck. The vacuum chuck is connected above the base, which is hollow inside. The vacuum chuck has adsorption holes, and a vacuum pipeline connects from inside the base to the adsorption holes on the vacuum chuck.

[0003] Based on this, the technical problem to be solved by this utility model is: how to solve the problems of poor stability and low efficiency in the clamping of optical materials. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides an optical material positioning fixture, which has the advantages of improving clamping efficiency and stability, thereby improving product production efficiency and quality.

[0005] The technical solution of this application is:

[0006] An optical material positioning fixture includes a base, a worktable disposed on the base, and a centering assembly; the base is provided with a vacuum channel; the worktable is provided with an adsorption cavity with an open upper surface; the adsorption cavity is in communication with the vacuum channel; the centering assembly includes a first positioning block and a second positioning block for clamping a workpiece; the first positioning block and the second positioning block are arranged opposite to each other on both sides of the worktable and are used to abut against the workpiece placed on the worktable.

[0007] In the aforementioned optical material positioning fixture, the first positioning block is disposed on the base; the second positioning block is slidably connected to the base; the first positioning block is provided with a first top for pressing against the workpiece; and the second positioning block is provided with a second top for pressing against the workpiece.

[0008] In the aforementioned optical material positioning fixture, the worktable is disposed on the upper end face of the base and extends vertically and protrudes from the base; the base is provided with a first mounting groove and a second mounting groove; the first positioning block is detachably disposed on the first mounting groove; and the second positioning block is slidably connected to the second mounting groove.

[0009] In the aforementioned optical material positioning fixture, the optical material positioning fixture further includes an adjustment component; the adjustment component includes a mounting block, an adjusting bolt, and a limiting block; the mounting block is disposed on the side of the base; the adjusting bolt is threadedly connected to the mounting block, one end of the adjusting bolt contacts the second positioning block, and is used to push the second positioning block to move horizontally along the second mounting groove; the limiting block is detachably disposed in the second mounting groove, the bottom surface of the limiting block contacts the upper end surface of the second positioning block, and is used to limit the vertical shaking of the second positioning block.

[0010] In the aforementioned optical material positioning fixture, a reset spring is also provided inside the second positioning block; the reset spring is located inside the second mounting groove; one end of the reset spring is connected to the second positioning block, and the other end of the reset spring is connected to the base.

[0011] In the aforementioned optical material positioning fixture, the worktable is a cuboid; the center of the worktable is provided with an adsorption hole communicating with the vacuum channel; the adsorption hole is surrounded by an adsorption groove communicating with it; the adsorption hole and the adsorption groove constitute the adsorption cavity.

[0012] In the aforementioned optical material positioning fixture, the first positioning block and the second positioning block are two pairs, used to abut against the four sides of the workpiece located on the worktable.

[0013] In the aforementioned optical material positioning fixture, the vacuum channel is provided with an exhaust port; the exhaust port is located on the side of the base.

[0014] One of the above-mentioned technical solutions in this application has at least one of the following advantages or beneficial effects:

[0015] This application combines vacuum adsorption and clamping to restrict the workpiece, reducing axial and radial sway and greatly improving the stability of the workpiece during processing, thereby improving product quality. At the same time, the operation of clamping the workpiece is convenient and reliable, effectively improving production efficiency. Attached image description:

[0016] Figure 1 This is a three-dimensional structural diagram of the workpiece in Embodiment 1 of this application;

[0017] Figure 2This is a top view of Embodiment 1 of this application;

[0018] Figure 3 This is a side view of Embodiment 1 of this application;

[0019] Figure 4 This is an embodiment 1 of the present application. Figure 3 AA section view;

[0020] Figure 5 This is a three-dimensional structural diagram of the base of Embodiment 1 of this application;

[0021] Figure 6 This is an embodiment 1 of the present application. Figure 5 A magnified view of a portion of the image;

[0022] Figure 7 This is a schematic diagram of the cooperation between the adjustment component and the second positioning block in Embodiment 1 of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] Base 1; Vacuum channel 11; Exhaust vent 111; First mounting slot 101; Second mounting slot 102; Worktable 2; Centering assembly 3; First positioning block 31; First top 310; Second positioning block 32; Second top 320; Reset spring 301; Adjustment assembly 4; Mounting block 41; Adjusting bolt 42; Limiting block 43; Adsorption chamber A; Adsorption hole 1a; Adsorption groove 2a; Processing shaft B; Workpiece C. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] Example 1

[0027] refer to Figures 1-7An optical material positioning fixture includes a base 1, a worktable 2 mounted on the base 1, and a centering assembly 3. The base 1 has a vacuum channel 11 with an exhaust port 111. The exhaust port 111 is located on the side of the base 1 and connected to an external vacuum pump. The worktable 2 has an adsorption cavity A with an open upper surface. The adsorption cavity A communicates with the vacuum channel 11. The centering assembly 3 includes a first positioning block 31 and a second positioning block 32 for clamping a workpiece C. The first positioning block 31 and the second positioning block 32 are arranged opposite to each other on both sides of the worktable 2. The first positioning block 31 is mounted on the base 1. The second positioning block 32 is slidably connected to the base 1.

[0028] Specifically, the first positioning block 31 has a first top 310 for abutting against the workpiece C; the second positioning block 32 has a second top 320 for abutting against the workpiece C. More specifically, in this embodiment, the worktable 2 is disposed on the upper surface of the base 1 and extends vertically, protruding from the base 1; the base 1 has a first mounting groove 101 and a second mounting groove 102; the first positioning block 31 is detachably disposed on the first mounting groove 101; the second positioning block 32 is slidably connected to the second mounting groove 102. It should be further noted that both the first top 310 and the second top 320 extend towards the worktable 2.

[0029] Under the above design, the first positioning block 31 and the second positioning block 32 are embedded. This method makes the first positioning block 31 and the second positioning block 32 fit with the base 1 more closely, which is conducive to further improving the stability of clamping and processing. At the same time, the first positioning block 31 and the second positioning block 32 will not interfere with the processing axis B.

[0030] In a preferred embodiment, the optical material positioning fixture further includes an adjustment component 4; the adjustment component 4 includes a mounting block 41, an adjusting bolt 42, and a limiting block 43; the mounting block 41 is disposed on the side of the base 1, specifically, the mounting block 41 and the limiting block 43 are detachably fixed to the base 1 by bolts; the adjusting bolt 42 is threadedly connected to the mounting block 41, one end of the adjusting bolt 42 contacts the second positioning block 32, and is used to push the second positioning block 32 to move horizontally along the second mounting groove 102; the limiting block 43 is detachably disposed in the second mounting groove 102, the bottom surface of the limiting block 43 contacts the upper end surface of the second positioning block 32, and is used to limit the up-and-down shaking of the second positioning block 32. In practical applications, one end of the limiting block 43 is detachably fixed to the base 1 by bolts, and the bottom surface of the other end of the limiting block 43 contacts the upper surface of the second positioning block 32. It should be noted that after the second positioning block 32 is pressed down by the limiting block 43, the second positioning block 32 in the second mounting groove 102 can still move back and forth. For specific cooperation methods, refer to... Figure 7 .

[0031] Under the above-mentioned preferred method, the operator can drive the second positioning block 32 to move horizontally back and forth along the second mounting groove 102 by rotating the adjusting bolt 42, thereby clamping or releasing the workpiece C. This not only has high clamping efficiency, but also allows the operator to gradually adjust the clamping force by adjusting the displacement distance of the second positioning block 32 through the adjusting bolt 42, thus avoiding excessive squeezing of the workpiece C.

[0032] As a further preferred embodiment, the second positioning block 32 is further provided with a return spring 301; the return spring 301 is located in the second mounting groove 102; one end of the return spring 301 is connected to the second positioning block 32, and the other end of the return spring 301 is connected to the base 1. Specifically, in this embodiment, the second positioning block 32 and the base are provided with corresponding holes, and the two ends of the return spring 301 are disposed in the corresponding holes.

[0033] In a further preferred embodiment, when the adjusting bolt 42 is rotated backward, the return spring 301 will automatically retract the second positioning block 32.

[0034] refer to Figure 5 , 6In this embodiment, specifically, the worktable 2 is a cuboid; the center of the worktable 2 is provided with an adsorption hole 1a communicating with the vacuum channel 11; the adsorption hole 1a is surrounded by adsorption grooves 2a communicating with it; the adsorption hole 1a and the adsorption grooves 2a constitute the adsorption cavity A. Under the above design, this embodiment is suitable for clamping a cuboid workpiece C, and according to its shape characteristics, the adsorption cavity A is jointly composed of the adsorption grooves 2a and the adsorption hole 1a, thereby maximizing the stability of adsorption.

[0035] refer to Figure 2 Specifically, regarding the worktable 2 described above, the first positioning block 31 and the second positioning block 32 are in two pairs, and are used to abut against the four sides of the workpiece C located on the worktable 2. With this design, the first positioning block 31 and the second positioning block 32 provide four-way positioning for the workpiece, further improving the reliability of the clamping.

[0036] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An optical material positioning fixture, characterized in that, The device includes a base, a worktable mounted on the base, and a centering assembly. The base has a vacuum channel. The worktable has an adsorption cavity with an open upper surface. The adsorption cavity is connected to the vacuum channel. The centering assembly includes a first positioning block and a second positioning block for clamping the workpiece. The first positioning block and the second positioning block are arranged opposite to each other on both sides of the worktable and are used to abut against the workpiece placed on the worktable.

2. The optical material positioning fixture according to claim 1, characterized in that, The first positioning block is disposed on the base; the second positioning block is slidably connected to the base; the first positioning block is provided with a first top for pressing against the workpiece; the second positioning block is provided with a second top for pressing against the workpiece.

3. The optical material positioning fixture according to claim 1, characterized in that, The workbench is disposed on the upper surface of the base and extends vertically out of the base; the base is provided with a first mounting groove and a second mounting groove; the first positioning block is detachably disposed on the first mounting groove; the second positioning block is slidably connected to the second mounting groove.

4. The optical material positioning fixture according to claim 3, characterized in that, The optical material positioning fixture further includes an adjustment assembly; the adjustment assembly includes a mounting block, an adjusting bolt, and a limiting block; the mounting block is disposed on the side of the base; the adjusting bolt is threaded onto the mounting block, one end of the adjusting bolt contacts the second positioning block and is used to push the second positioning block to move horizontally along the second mounting groove; the limiting block is detachably disposed in the second mounting groove, the bottom surface of the limiting block contacts the upper surface of the second positioning block and is used to limit the vertical shaking of the second positioning block.

5. The optical material positioning fixture according to claim 4, characterized in that, The second positioning block is also provided with a reset spring; the reset spring is located in the second mounting groove; one end of the reset spring is connected to the second positioning block, and the other end of the reset spring is connected to the base.

6. The optical material positioning fixture according to any one of claims 1 to 5, characterized in that, The worktable is a cuboid; the center of the worktable is provided with an adsorption hole that communicates with the vacuum channel; the adsorption hole is surrounded by an adsorption groove that communicates with it; the adsorption hole and the adsorption groove constitute the adsorption cavity.

7. The optical material positioning fixture according to claim 6, characterized in that, The first positioning block and the second positioning block are two pairs and are used to abut against the four sides of the workpiece located on the worktable.

8. The optical material positioning fixture according to claim 1, characterized in that, The vacuum channel is equipped with an exhaust port; the exhaust port is located on the side of the base.

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