Lens edge milling clamp

Abstract

The utility model provides a lens edge milling and grinding clamp. The lens edge milling and grinding clamp comprises a base part, a plurality of clamping finger parts and a mounting part, the base part is axially positioned between the plurality of clamping finger parts and the mounting part; the plurality of clamping finger parts are concentrically arranged around the finger part central axes of the plurality of clamping finger parts, are spaced from each other in the circumferential direction through slits and are spaced from each other in the radial direction, and one end, close to the base part, of each clamping finger part is fixedly connected to the base part; the plurality of clamping fingers are used for opening through elastic deformation and clamping a lens to be milled and ground by the edge of the milling and grinding tool through elastic restoring force generated by the elastic deformation; the mounting part is used for being mounted on a rotatable main shaft of external milling and grinding equipment; the finger part central axes of the plurality of clamping finger parts coincide with the mounting part central axis of the mounting part in the axial direction. Therefore, the edge of the lens can be milled and ground uniformly, and the edge milling and grinding process can be stable.

Description

Technical Field

[0001] The present disclosure relates to the field of infrared material processing, and more particularly to a lens edge milling fixture. Background Art

[0002] Milling is a very important step in infrared material processing. One important requirement is the ETV (Edge Thickness Variation) of the processed product. The stability of the fixture during operation has a great impact on the ETV of the product.

[0003] Figure 1 is a top view of the current lens edge milling fixture. Figure 2 is Figure 1 a cross-sectional view taken along line A'-A' of Figure 3 is Figure 1 a schematic diagram of the working state of the lens edge milling fixture of

[0004] In Figures 1 to 3 the current lens edge milling fixture 100' includes a base 1', a plurality of clamping fingers 2', and a mounting portion 3'.

[0005] The base 1' is located axially D between the plurality of clamping fingers 2' and the mounting portion 3'. The plurality of clamping fingers 2' are concentrically arranged around the finger central axis L2' of the plurality of clamping fingers 2', are spaced apart from each other circumferentially by a slit S', are spaced apart from each other radially, and are fixedly connected to the base 1' at one end close to the base 1'. The plurality of clamping fingers 2' are used to open by elastic deformation and clamp the lens 200 to be edge-milled by a milling tool 300 by the elastic restoring force generated by the elastic deformation. The mounting portion 3' is used to be mounted on a rotatable main shaft (not shown) of an external milling device.

[0006] In Figure 1 and Figure 2 the shown lens edge milling fixture 100', the finger central axis L2' of the plurality of clamping fingers 2' and the mounting portion central axis L3' of the mounting portion 3' do not coincide axially D (i.e., are not coaxial). This results in an eccentricity problem, which will cause one side of the plurality of clamping fingers 2' to be larger and the other side to be smaller when milling the lens edge milling fixture 100', that is Figure 1In this case, the upper part is larger and the lower part is smaller. When milling the lens 200 at the edge of the milling tool 300, the rotatable main shaft of the milling equipment drives the mounting portion 3' to rotate around the central axis L3' of the mounting portion, and then drives the base portion 1' and the plurality of clamping fingers 2' to rotate around the central axis L3' of the mounting portion. Since the finger central axis L2' of the plurality of clamping fingers 2' and the central axis L3' of the mounting portion 3' do not coincide in the axial direction D, in this way, the edge milling of the lens 200 by the milling tool 300 at a fixed position is uneven.

[0007] In addition, since the lens edge milling fixture 100' is in the Figure 3 horizontal placement posture shown during operation, the rotatable main shaft of the milling equipment drives the mounting portion 3' to rotate around the central axis L3' of the mounting portion, and then drives the base portion 1' and the plurality of clamping fingers 2' to rotate around the central axis L3' of the mounting portion. Since the finger central axis L2' of the plurality of clamping fingers 2' and the central axis L3' of the mounting portion 3' do not coincide in the axial direction D, the center of gravity of the clamped lens 200 is also not located on the central axis L3' of the mounting portion 3'. Furthermore, the forces on each part of the lens 200 are uneven, resulting in an unstable edge milling process when the milling tool 300 mills the edge of the lens 200, affecting the ETV of the edge milling of the lens 200. Summary of the Invention

[0008] In view of the problems existing in the background technology, an object of the present disclosure is to provide a lens edge milling fixture that can make the edge milling of the lens uniform.

[0009] Another object of the present disclosure is to provide a lens edge milling fixture that can make the edge milling process stable.

[0010] Therefore, a lens edge milling fixture is provided. The lens edge milling fixture includes a base portion, a plurality of clamping fingers, and a mounting portion; the base portion is axially located between the plurality of clamping fingers and the mounting portion; the plurality of clamping fingers are concentrically arranged around the finger central axis of the plurality of clamping fingers, are spaced apart from each other in the circumferential direction by slits, are spaced apart from each other in the radial direction, and are fixedly connected to the base portion at one end close to the base portion. The plurality of clamping fingers are used to open by elastic deformation and clamp the lens to be edge milled by the milling tool by the elastic restoring force generated by the elastic deformation; the mounting portion is used to be mounted on the rotatable main shaft of an external milling equipment; the finger central axis of the plurality of clamping fingers and the central axis of the mounting portion of the mounting portion coincide axially.

[0011] The beneficial effects of the present disclosure are as follows.

[0012] In the lens edge milling fixture according to the present disclosure, the finger center axes of the plurality of clamping fingers and the mounting portion center axis of the mounting portion coincide axially (i.e., are coaxial). This avoids the eccentricity problem in the background art and will not cause one side of the plurality of clamping fingers in the background art to be larger and the other side to be smaller when milling the lens edge milling fixture. Because when milling the edge of the lens with a milling tool, the rotatable main shaft of the milling equipment drives the mounting portion to rotate around the mounting portion center axis, and then drives the base portion and the plurality of clamping fingers to rotate around the mounting portion center axis. Since the finger center axes of the plurality of clamping fingers and the mounting portion center axis of the mounting portion coincide axially, in this way, the edge milling of the lens by the milling tool at a fixed position is uniform.

[0013] In addition, since the lens edge milling fixture is in a horizontal placement posture during operation, the rotatable main shaft of the milling equipment drives the mounting portion to rotate around the mounting portion center axis, and then drives the base portion and the plurality of clamping fingers to rotate around the mounting portion center axis. Since the finger center axes of the plurality of clamping fingers and the mounting portion center axis of the mounting portion coincide axially in the axial direction D, the center of gravity of the clamped lens is located on the mounting portion center axis of the mounting portion, thereby making the forces on each part of the lens uniform, so that the edge milling process is stable when the milling tool mills the edge of the lens, thereby avoiding affecting the ETV of the lens edge milling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a top view of the current lens edge milling fixture.

[0015] Figure 2 is Figure 1 a cross-sectional view taken along line A'-A' of

[0016] Figure 3 is Figure 1 a schematic diagram of the working state of the lens edge milling fixture of

[0017] Figure 4 is a perspective view of the lens edge milling fixture according to the present disclosure.

[0018] Figure 5 is Figure 4 a perspective view from another angle of

[0019] Figure 6 is Figure 4 a perspective sectional view of

[0020] Figure 7 is Figure 5 a top view of

[0021] Figure 8 is Figure 7 a cross-sectional view taken along line A-A of

[0022] Figure 9 It is a schematic diagram of the working state of the lens edge milling fixture according to the present disclosure.

[0023] Among them, the reference numerals are explained as follows.

[0024] 100' lens edge milling fixture 100 lens edge milling fixture

[0025] 1' base 1 base

[0026] 2' clamping fingers 2 clamping fingers

[0027] 21' body part 21 body part

[0028] 22' finger head 22 finger head

[0029] 221' inner peripheral surface 221 inner peripheral surface

[0030] 222' outer peripheral surface 222 outer peripheral surface

[0031] 223' step 223 inner step

[0032] 23' root 224 outer step

[0033] 231' end face 23 root

[0034] L2' central axis 231 end face

[0035] S' slit L2 central axis

[0036] R' recess S slit

[0037] 3' mounting part R recess

[0038] 31' internal thread 3 mounting part

[0039] L3' mounting part central axis 31 internal thread

[0040] D axial L3 mounting part central axis

[0041] 200 lens

[0042] 300 milling tool Specific embodiments

[0043] The drawings illustrate embodiments of the present disclosure, and it will be understood that the disclosed embodiments are merely examples of the present disclosure, and the present disclosure can be implemented in various forms. Therefore, the specific details disclosed herein should not be construed as limiting, but only as a basis for the claims and as a representative basis for teaching those of ordinary skill in the art to implement the present disclosure in various ways.

[0044] Refer to Figures 4 to 9, the lens edge milling fixture 100 according to the present disclosure includes a base 1, a plurality of clamping fingers 2, and a mounting portion 3.

[0045] The base 1 is located between the plurality of clamping fingers 2 and the mounting portion 3 along the axial direction D. The plurality of clamping fingers 2 are concentrically arranged around the finger central axis L2 of the plurality of clamping fingers 2, are spaced apart from each other circumferentially by a slit S, are spaced apart from each other radially, and are fixedly connected to the base 1 at one end close to the base 1. The plurality of clamping fingers 2 are used to open by elastic deformation and clamp the lens 200 to be edge-milled by a milling tool 300 by the elastic restoring force generated by the elastic deformation. The mounting portion 3 is used to be mounted on a rotatable main shaft (not shown) of an external milling device; the finger central axis L2 of the plurality of clamping fingers 2 and the mounting portion central axis L3 of the mounting portion 3 coincide axially in the axial direction D.

[0046] In the lens edge milling fixture 100 according to the present disclosure, the finger central axis L2 of the plurality of clamping fingers 2 and the mounting portion central axis L3 of the mounting portion 3 coincide axially in the axial direction D (i.e., coaxial). This avoids the eccentric problem in the background art and will not cause one side of the plurality of clamping fingers 2 in the background art to be larger and the other side to be smaller when milling the lens edge milling fixture 100 (i.e., Figure 1 in the upper half is larger and the lower half is smaller). Because when edge-milling the lens 200 with the milling tool 300, the rotatable main shaft of the milling device drives the mounting portion 3 to rotate around the mounting portion central axis L3, and then drives the base 1 and the plurality of clamping fingers 2 to rotate around the mounting portion central axis L3. Since the finger central axis L2 of the plurality of clamping fingers 2 and the mounting portion central axis L3 of the mounting portion 3 coincide axially in the axial direction D, in this way, the edge milling of the lens 200 by the milling tool 300 fixed in position is uniform.

[0047] In addition, since the lens edge milling fixture 100 is in the Figure 9 horizontal placement posture shown during operation, the rotatable main shaft of the milling device drives the mounting portion 3 to rotate around the mounting portion central axis L3, and then drives the base 1 and the plurality of clamping fingers 2 to rotate around the mounting portion central axis L3. Since the finger central axis L2 of the plurality of clamping fingers 2 and the mounting portion central axis L3 of the mounting portion 3 coincide axially in the axial direction D, the center of gravity of the clamped lens 200 is located on the mounting portion central axis L3 of the mounting portion 3, so that the forces on each part of the lens 200 are uniform, thereby making the edge milling process stable when the milling tool 300 edge-mills the lens 200, and thus avoiding affecting the ETV of the edge milling of the lens 200.

[0048] In one example, as Figure 5 , Figure 6 , Figure 8As shown, each clamping finger portion 2 includes a body portion 21, a finger head portion 22, and a root portion 23. The inner circumferential surface 221 of the finger head portion 22 is used to clamp the lens 200 to be edge-milled by the milling tool 300. The finger head portion 22 and the root portion 23 are located on both sides of the body portion 21 along the axial direction D and respectively protrude from the body portion 21 along the axial direction D. The finger head portions 22 of the plurality of clamping finger portions 2 and the body portion 21 enclose a recess R. The slit S penetrates through the finger head portion 22, the body portion 21, and the root portion 23 along the axial direction D. The end surface 231 of the root portion 23 along the axial direction D is fixedly connected to the base portion 1.

[0049] In one example, as Figure 5 , Figure 6 , Figure 8 shown, the finger head portion 22 is provided with an inner step 223 on the radially inner side, and the inner step 223 is used to support and clamp the lens 200 to be edge-milled by the milling tool 300.

[0050] In one example, as Figure 5 , Figure 6 , Figure 8 shown, the finger head portion 22 is provided with an outer step 224 on the radially outer side, and the outer step 224 is used to prevent the edge of the milling tool 300 from hitting the base portion 1 when milling the lens 200.

[0051] In one example, as Figure 4 , Figure 5 , Figure 6 , Figure 8 shown, the root portion 23 is a multi-stage cylinder with a stepped outer diameter dimension.

[0052] As Figure 5 and Figure 7 shown, the plurality of clamping finger portions 2 are arranged at equal intervals in the circumferential direction. The plurality of clamping finger portions 2. The number of the plurality of clamping finger portions 2 is not limited to four in the figure, and can be less than four or more than four.

[0053] As Figure 6 and Figure 8 shown, in one example, the installation portion 3 is provided with an internal thread 31, and the internal thread 31 is used to be installed on the threaded portion (not shown) of the corresponding component of an external milling device.

[0054] In one example, the lens edge milling fixture 100 is an integral single piece.

[0055] The lens edge milling fixture 100 according to the present disclosure is applicable not only to the case where the lens 200 is made of an infrared material, but also to the case where the lens 200 is made of a non-infrared material.

[0056] In addition, the material of the lens edge milling fixture 100 according to the present disclosure can be, but is not limited to, plastic.

[0057] Multiple exemplary embodiments are described with the detailed description above, but the present disclosure is not intended to be limited to the explicitly disclosed combinations. Thus, unless otherwise stated, the various features disclosed herein may be combined together to form multiple additional combinations not shown for the sake of brevity.

Claims

1. A lens edge milling fixture, characterized in that the lens edge milling fixture (100) includes a base (1), a plurality of clamping fingers (2), and a mounting portion (3); the base (1) is axially located (D) between the plurality of clamping fingers (2) and the mounting portion (3); the plurality of clamping fingers (2) are concentrically arranged around the finger central axis (L2) of the plurality of clamping fingers (2), are spaced apart from each other in the circumferential direction by a slit (S), are spaced apart from each other in the radial direction, and are fixedly connected to the base (1) at one end close to the base (1). The plurality of clamping fingers (2) are used to open by elastic deformation and clamp the lens (200) to be edge-milled by a milling tool (300) by the elastic restoring force generated by the elastic deformation; the mounting portion (3) is used to be mounted on the rotatable main shaft of an external milling device; the finger central axis (L2) of the plurality of clamping fingers (2) and the mounting portion central axis (L3) of the mounting portion (3) coincide axially (D).

2. The lens edge milling fixture according to claim 1, characterized in that each clamping finger (2) includes a body portion (21), a finger head portion (22), and a root portion (23); the inner circumferential surface (221) of the finger head portion (22) is used to clamp the lens (200) to be edge-milled by a milling tool (300); the finger head portion (22) and the root portion (23) are axially located (D) on both sides of the body portion (21) and respectively protrude axially (D) from the body portion (21); the finger head portions (22) of the plurality of clamping fingers (2) and the body portion (21) enclose a concave portion (R); the slit (S) axially penetrates (D) the finger head portion (22), the body portion (21), and the root portion (23); the end surface (231) of the root portion (23) in the axial direction (D) is fixedly connected to the base (1).

3. The lens edge milling fixture according to claim 2, characterized in that the finger head portion (22) is provided with an inner step (223) on the radially inner side, and the inner step (223) is used to support and clamp the lens (200) to be edge-milled by a milling tool (300).

4. The lens edge milling fixture according to claim 2, characterized in that the finger head portion (22) is provided with an outer step (224) on the radially outer side, and the outer step (224) is used to prevent the milling tool (300) from hitting the base (1) when edge-milling the lens (200).

5. The lens edge milling fixture according to claim 2, characterized in that the root portion (23) is a multi-stage cylinder with a stepped outer diameter size.

6. The lens edge milling fixture according to claim 1, characterized in that the plurality of clamping fingers (2) are arranged at equal intervals in the circumferential direction.

7. The lens edge milling fixture according to claim 1, characterized in that the mounting portion (3) is provided with an internal thread (31), and the internal thread (31) is used to be mounted on the threaded portion of the corresponding component of an external milling device.

8. The lens edge milling fixture according to claim 1, characterized in that the lens edge milling fixture (100) is an integral single piece.

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