A coaxial rounding device for long rod lenses

Abstract

This invention provides a coaxial grinding device for a long rod lens, comprising a conversion fixture, a clamp, and a dial indicator. The conversion fixture is coaxially connected to the machine tool spindle, and the clamp is connected to the conversion fixture via a first screw. The clamp includes a flange and a fixing part, which are coaxially connected. The flange has a plurality of fixing holes evenly distributed in a circular array. The diameter of the fixing holes is larger than the nominal diameter of the first screw, which passes through the fixing holes and connects to the conversion fixture. The long rod lens is fixed on the fixing part. The dial indicator is fixed to the machine tool via a bracket, and the measuring end of the dial indicator abuts against the outer diameter of the long rod lens. When using the dial indicator to measure the outer diameter of the long rod lens, the position of the clamp on the conversion fixture can be flexibly adjusted according to the feedback value of the dial indicator, thereby precisely adjusting the coaxiality during the processing of the long rod lens, improving the processing accuracy of the long rod lens, and avoiding the problem of laser transmission path deviation caused by poor coaxiality of the long rod lens.

Description

Technical Field

[0001] This utility model relates to the field of long rod lens processing technology, and in particular to a coaxial grinding device for long rod lenses. Background Technology

[0002] The core objective of coaxial grinding and centering is to ensure that the geometric central axis of the lens coincides with the optical central axis (optical axis) by grinding the outer circumference of the lens. This ensures the centering (coaxiality) of the long rod lens during assembly in the optical system, allowing the system's light path to transmit along the designed path. Poor centering (coaxiality) will lead to coaxial errors, causing aberrations (such as coma and astigmatism) during lens system assembly and reducing the system's image quality.

[0003] In high-power fiber laser transmission systems, the hazards posed by poor coaxiality of long rod lenses are even more pronounced. Intense laser beams demand extremely precise transmission paths; even minute coaxial errors can cause path deviations. These deviations not only prevent efficient laser energy transmission but also concentrate energy on non-target components, leading to damage to other parts of the equipment, malfunctions, and even serious safety incidents. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a coaxial grinding device for long rod lenses, which can adjust the coaxiality during the processing of long rod lenses.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a coaxial grinding device for a long rod lens, including a conversion fixture, a clamp and a dial indicator;

[0007] The conversion fixture is coaxially connected to the machine tool spindle, and the clamp is connected to the conversion fixture by a first screw.

[0008] The fixture includes a flange and a fixing part, which are coaxially connected. The flange has a plurality of fixing holes evenly distributed in a ring array. The diameter of the fixing holes is larger than the nominal diameter of the first screw. The first screw passes through the fixing holes and connects to the conversion fixture. The long rod lens is fixed on the fixing part.

[0009] The dial indicator is fixed to the machine tool by a bracket, and the measuring end of the dial indicator abuts against the outer circle of the long rod lens.

[0010] Furthermore, the fixing part is composed of a connecting section, a threaded section and a clamping section. The connecting section is connected to the flange part. The threaded section is located between the connecting section and the clamping section. The outer wall of the fixing part is provided with a plurality of grooves. The grooves extend from the clamping section to the connecting section, so that the clamping section forms a plurality of clamping pieces.

[0011] The grinding device also includes a locking nut, which is helically connected to the threaded section. The inner wall of the locking nut has a first inclined surface, and the end of the clamping section has a second inclined surface. When the locking nut is screwed onto the threaded section, the first inclined surface and the second inclined surface abut against each other, so that the clamping plate clamps the long rod lens.

[0012] Furthermore, an anti-slip silicone block is provided between the clamping plate and the long rod lens.

[0013] Furthermore, the fixing hole is provided in three parts.

[0014] Furthermore, the diameter of the fixing hole is 1 mm larger than the diameter of the first screw.

[0015] The advantages of this utility model are:

[0016] 1. The fixture and conversion jig are connected by a first screw passing through a fixing hole with a diameter larger than its nominal diameter, allowing for fine-tuning of the fixture's position within a certain range. When using a dial indicator to measure the outer diameter of the long rod lens, the position of the fixture on the conversion jig can be flexibly adjusted based on the dial indicator's feedback value. This allows for precise adjustment of the coaxiality during the machining of the long rod lens, improving the machining accuracy and preventing laser transmission path deviation caused by poor coaxiality of the long rod lens.

[0017] 2. This device excels in clamping efficiency and compatibility. The fixture is highly adaptable, capable of quickly clamping various long rod lenses with diameters ranging from Φ3mm to Φ30mm, significantly reducing single clamping time to less than 30 seconds, thus substantially improving processing efficiency. Simultaneously, the device simplifies the positioning process, eliminating the need for complex positioning tooling and reducing reliance on operator expertise, effectively lowering labor training costs.

[0018] 3. It adopts a purely mechanical structure design, which can operate stably in harsh environments such as high vibration and high dust, fundamentally eliminating the risk of electronic component failure. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of a specific embodiment of the coaxial grinding device for a long rod lens according to the present invention.

[0021] Figure 2 This is a schematic diagram of a specific embodiment of the coaxial grinding device for a long rod lens according to the present invention.

[0022] Figure 3 This is a schematic diagram of the fixture structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the locking nut structure of this utility model.

[0024] Explanation of the labels in the diagram:

[0025] 1. Conversion fixture; 2. Clamp; 21. Flange; 211. Fixing hole; 22. Fixing part; 221. Connecting section; 222. Threaded section; 223. Clamping section; 23. Groove; 24. Clamping piece; 25. Second inclined surface; 3. Dial indicator; 4. First screw; 5. Locking nut; 51. First inclined surface; 6. Anti-slip silicone block. Detailed Implementation

[0026] Please see Figures 1 to 4 This utility model provides a coaxial grinding device for a long rod lens, including a conversion fixture 1, a clamp 2 and a dial indicator 3;

[0027] The conversion fixture 1 is coaxially connected to the machine tool spindle, and the clamp 2 is connected to the conversion fixture 1 by the first screw 4;

[0028] The clamp 2 includes a flange 21 and a fixing part 22, which are coaxially connected. The flange 21 has a plurality of fixing holes 211 evenly distributed in a circular array. The diameter of each fixing hole 211 is larger than the nominal diameter of the first screw 4. The first screw 4 passes through the fixing holes 211 and connects to the conversion fixture 1. The long rod lens 8 is fixed to the fixing part 22. An anti-slip silicone block 6 is also provided between the fixing part 22 and the long rod lens. The anti-slip silicone block 6 is used to prevent scratches on the outer circumference of the long rod lens. Furthermore, by configuring anti-slip silicone blocks 6 of different thicknesses, the diameter of the long rod lens clamped by the fixing part 22 can be between 3-30 mm. Since the diameter of the fixing hole 211 is larger than the diameter of the first screw 4, when there is a coaxiality deviation in the long rod lens, after loosening the first screw 4, the coaxiality of the long rod lens can be adjusted to the specified range by adjusting the installation position of the clamp 2.

[0029] The dial indicator 3 is fixed to the machine tool by a bracket, and the measuring end of the dial indicator 3 abuts against the outer circle of the long rod lens. The accuracy of the dial indicator 3 is 0.001 mm.

[0030] The operator uses a dial indicator 3 to detect the radial runout of the outer circle of the lens, and manually adjusts the installation position of the fixture 2 according to the detection data to correct the deviation until the coaxial accuracy is <0.003mm. Then, the first screw 4 is tightened, and the long rod lens 8 is ground by rotating the grinding disc 7 (driven by other drive mechanisms).

[0031] Specifically, the fixing part 22 is composed of a connecting section 221, a threaded section 222 and a clamping section 223. The connecting section 221 is connected to the flange part 21. The threaded section 222 is located between the connecting section 221 and the clamping section 223. The outer wall of the fixing part 22 is provided with a plurality of grooves 23. The grooves 23 extend from the clamping section 223 to the connecting section 221, so that the clamping section 223 forms a plurality of clamping pieces 24.

[0032] The grinding device also includes a locking nut 5, which has a double-threaded design and an adjustable clamping force range of 5–20 N·m.

[0033] The locking nut 5 is helically connected to the threaded section 222. The inner wall of the locking nut 5 is provided with a first inclined surface 51, and the end of the clamping section 223 is provided with a second inclined surface 25. When the locking nut 5 is screwed onto the threaded section 222, the first inclined surface 51 and the second inclined surface 25 abut against each other, so that the clamping piece 24 clamps the long rod lens.

[0034] When the locking nut 5 is tightened, after the first inclined surface 51 contacts the second inclined surface 25, as the locking nut 5 is screwed in, the first inclined surface 51 pushes the clamping piece 24 against the long rod lens, so that the clamping piece 24 clamps the long rod lens. In this utility model, the clamp 2 is made of a high-polymer elastic material. Therefore, the clamping piece 24 is elastic. After the locking nut 5 is loosened, the clamping piece 24 returns to its original position under its own elastic force. At this time, the clamping piece 24 releases its fixation on the long rod lens.

[0035] Specifically, an anti-slip silicone block 6 is provided between the clamping piece 24 and the long rod lens. The anti-slip silicone block 6 can increase the friction between the clamping piece 24 and the long rod lens, thereby improving the clamping effect; on the other hand, it can also prevent scratches from appearing on the long rod lens.

[0036] Specifically, the fixing hole 211 is provided with three holes.

[0037] Specifically, the diameter of the fixing hole 211 is 1 mm larger than the diameter of the first screw 4. In this device, the adjustment stroke of the clamp 2 is 1 mm.

[0038] One specific application of this utility model is:

[0039] Dial indicator 3 is fixed to the machine tool with a bracket, and the measuring end of dial indicator 3 is in contact with the outer circle of the long rod lens. After the machine tool spindle rotates, the operator uses dial indicator 3 to detect the radial runout of the outer circle of the lens.

[0040] If the radial runout of the lens's outer circumference does not meet the preset accuracy, loosen the first screw 4 and manually adjust the installation position of the clamp 2 to correct the deviation. After adjustment, tighten the first screw 4 again and confirm that the coaxiality of the long rod lens is adjusted to the specified range by observing the radial runout of the lens. If not, adjust the coaxiality of the long rod lens again in the above manner until the coaxial accuracy is <0.003mm.

[0041] If so, start the machine tool and grind the outer circle of the long rod lens.

[0042] The advantages of this utility model are as follows: 1. The fixture and conversion jig are connected by a first screw passing through a fixing hole with a diameter larger than its nominal diameter, allowing the fixture to be finely adjusted within a certain range. When using a dial indicator to measure the outer diameter of the long rod lens, the position of the fixture on the conversion jig can be flexibly adjusted according to the feedback value of the dial indicator, thereby accurately adjusting the coaxiality during the processing of the long rod lens, improving the processing accuracy of the long rod lens, and avoiding the problem of laser transmission path deviation caused by poor coaxiality of the long rod lens. 2. The device performs excellently in clamping efficiency and compatibility. The fixture has high adaptability and can quickly clamp various long rod lenses with diameters ranging from Φ3mm to Φ30mm, significantly reducing the single clamping time to less than 30 seconds, significantly improving processing efficiency. At the same time, the device simplifies the positioning process, eliminating the need for complex positioning tooling, reducing reliance on the professional skills of operators, and effectively reducing labor training costs. 3. Adopting a purely mechanical structure design, it can operate stably in harsh environments such as high vibration and high dust, fundamentally eliminating the risk of electronic component failure.

[0043] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A coaxial grinding device for a long rod lens, characterized in that: This includes conversion jigs, fixtures, and dial indicators; The conversion fixture is coaxially connected to the machine tool spindle, and the clamp is connected to the conversion fixture by a first screw. The fixture includes a flange and a fixing part, which are coaxially connected. The flange has a plurality of fixing holes evenly distributed in a ring array. The diameter of the fixing holes is larger than the nominal diameter of the first screw. The first screw passes through the fixing holes and connects to the conversion fixture. The long rod lens is fixed on the fixing part. The dial indicator is fixed to the machine tool by a bracket, and the measuring end of the dial indicator abuts against the outer circle of the long rod lens.

2. The coaxial grinding device for a long rod lens as described in claim 1, characterized in that: The fixing part is composed of a connecting section, a threaded section and a clamping section. The connecting section is connected to the flange part. The threaded section is located between the connecting section and the clamping section. The outer wall of the fixing part is provided with a number of grooves. The grooves extend from the clamping section to the connecting section, so that the clamping section forms a number of clamping pieces. The grinding device also includes a locking nut, which is helically connected to the threaded section. The inner wall of the locking nut has a first inclined surface, and the end of the clamping section has a second inclined surface. When the locking nut is screwed onto the threaded section, the first inclined surface and the second inclined surface abut against each other, so that the clamping plate clamps the long rod lens.

3. The coaxial grinding device for a long rod lens as described in claim 2, characterized in that: An anti-slip silicone block is also provided between the clamping plate and the long rod lens.

4. The coaxial grinding device for a long rod lens as described in claim 1, characterized in that: There are three fixing holes.

5. The coaxial grinding device for a long rod lens as described in claim 1, characterized in that: The diameter of the fixing hole is 1 mm larger than the diameter of the first screw.

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