CN215725650U - Assembly coaxiality control and measurement device for laser output head glass column - Google Patents
Assembly coaxiality control and measurement device for laser output head glass column Download PDFInfo
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- CN215725650U CN215725650U CN202121723640.7U CN202121723640U CN215725650U CN 215725650 U CN215725650 U CN 215725650U CN 202121723640 U CN202121723640 U CN 202121723640U CN 215725650 U CN215725650 U CN 215725650U
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Abstract
The utility model discloses an assembly coaxiality control and measurement device for a glass column of a laser output head, which is characterized in that: comprises an air-float rotary table for holding the laser output head and performing X, Y theta on the laser output headX、θYAdjusting; the dial indicator is used for verifying whether an output head metal shell of the laser output head is coaxial with the air floatation rotary table or not; the coaxiality measuring module is used for verifying whether the output head glass column of the laser output head is coaxial with the air floatation rotary table or not and assembling the coaxiality of the output head glass column and the output head metal shellCarrying out measurement; and the device supporting frame is used for fixing the air floatation rotary table and the coaxiality measuring module. The utility model greatly improves the assembly coaxiality precision of the laser output head glass column and improves the application quality of laser cutting, welding and the like; the machining precision requirement of the mechanical shell is reduced, and therefore the production cost of the laser output head is reduced.
Description
Technical Field
The utility model relates to an assembly coaxiality control and measurement device for a glass column of a laser output head.
Background
The high-power fiber laser has very high fiber core power density when outputting laser, and the high-power fiber laser is easy to damage the output end face of the fiber to cause the failure of the laser. Because the optical fiber and the glass column after being welded cannot meet the requirement of subsequent integrated use and are easy to damage, the welded glass column needs to be further packaged to form the laser output head. In order to meet the processing quality requirements of subsequent laser cutting, welding and other applications, the high requirement is provided for the pointing angle of the output beam of the output head, and the tolerance of the assembly coaxiality of the glass column plays a key role in controlling the pointing angle of the output beam.
The prior art is the less mechanical part of machining tolerance generally, makes it internal diameter and glass post external diameter match as far as possible, but very high to the machining precision requirement like this, and the processing degree of difficulty is big, and is expensive, and relies on the tolerance matching alone and can't the axiality of quantitative control glass post assembly in process of production, leads to the parameter requirement that can't satisfy laser output beam directive angle.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: the existing laser output head glass column assembly coaxiality control method has the problems of high requirement and high difficulty.
In order to solve the problems, the technical scheme of the utility model is to provide a device for controlling and measuring the assembly coaxiality of a glass column of a laser output head, which is characterized in that: comprises an air-float rotary table for holding the laser output head and carrying out X, Y theta on the laser output headX、θYAdjusting;
the dial indicator is used for verifying whether an output head metal shell of the laser output head is coaxial with the air floatation rotary table or not;
the coaxiality measuring module is used for verifying whether an output head glass column of the laser output head is coaxial with the air floatation rotary table or not and measuring the assembly coaxiality of the output head glass column and the output head metal shell;
the device support frame is used for fixing the air floatation rotary table and the coaxiality measuring module, and the coaxiality measuring module is arranged right above the laser output head.
Preferably, the coaxiality measuring module comprises a light beam emitting module, a semi-transparent semi-reflecting mirror, a lens, a plane reflecting mirror, a CCD (charge coupled device) and a CCD (charge coupled device) photosensitive surface display screen, wherein the plane reflecting mirror is arranged on the air floatation rotary table, the lens is arranged between the semi-transparent semi-reflecting mirror and the plane reflecting mirror, the CCD is arranged above the semi-transparent semi-reflecting mirror, the light beam emitting module emits a light beam with a cross reticle image to be incident on the semi-transparent semi-reflecting mirror, the light beam reflected by the semi-transparent semi-reflecting mirror is incident on the lens to form a parallel light beam to be emitted onto the plane reflecting mirror, and the center of the cross reticle image reflected back to the CCD photosensitive surface display screen when the plane reflecting mirror and the axis of the air floatation rotary table are coaxial;
adjusting the angle of an output head glass column on the air floatation rotary table until the offset between the center point of the cross reticle image received by the CCD and the original position is minimum, and controlling the assembly coaxiality of the output head glass column;
and calculating to obtain the assembly coaxiality parameter of the output head glass column according to the offset between the center point of the cross reticle image reflected by the output head glass column and the original position received by the CCD, and measuring the assembly coaxiality of the output head glass column.
Preferably, the air-floating rotary table is provided with a through hole for the tail fiber of the laser output head to pass through.
Compared with the prior art, the utility model has the beneficial effects that:
the coaxiality of the output head metal shell and the output head glass column is checked in sequence by means of the air-floating rotary table, so that the assembly coaxiality precision of the laser output head glass column is greatly improved, and the application quality of cutting, welding and the like of a laser is improved; the machining precision requirement of the mechanical shell is reduced, and therefore the production cost of the laser output head is reduced.
Drawings
FIG. 1 is a schematic view of an assembly coaxiality control and measurement device for a glass column of a laser output head according to the present invention;
FIG. 2 is a schematic diagram of a laser output head;
FIG. 3 is a bottom view of the device holder;
fig. 4 is a schematic structural diagram of a coaxiality measuring module.
Detailed Description
In order to make the utility model more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
As shown in FIGS. 1 to 3, the device for controlling and measuring the assembly coaxiality of the glass column of the laser output head comprises a clamping device which can clamp the laser output head 1 and can perform operations of X, Y and thetaX、θYThe device comprises an adjusted air floatation rotary table 2, a dial indicator 3 for axis verification, a coaxiality measuring module 4 for glass column angle verification and measurement and a device support frame 5.
The laser output head 1 is used for coupling output laser to equipment of an application end and comprises an output head glass column 1-1 and an output head metal shell 1-2, wherein the output head glass column 1-1 is welded with a laser output tail fiber. The air-floating rotary table 2 is used for clamping the output head, can provide X, Y, thetax and thetay adjustment of the output head, and provides high-precision positioning function in the process of assembly coaxiality control and measurement of the output head glass column 1-1. The air flotation rotary table 2 comprises a non-damping rotary module, a 4-dimensional adjusting frame is arranged above the non-damping rotary module and can be used for X, Y, theta X and theta Y adjustment, the centers of the non-damping rotary module and the 4-dimensional adjusting frame both comprise a through hole, and the minimum inscribed diameter of the through hole is generally 2-10 cm. A chuck which can clamp the laser output head 1 is arranged above the 4-dimensional adjusting frame. And the dial indicator 3 is arranged on a base of a device support frame 5 or other stable table tops and used for checking the coaxiality of the metal shell 1-2 of the output head and the air floatation rotary table 2.
The device support frame 5 is used for fixing the air floatation rotary table 2 and the coaxiality measuring module 4, and the coaxiality measuring module 4 is fixed right above the laser output head 1 on the air floatation rotary table 2. The bottom surface of the device support frame 5 comprises a through hole 5-1 which penetrates through the device support frame, the through hole 5-1 can be in a circular shape, a square shape or other shapes and is used for penetrating through a tail fiber output by a laser, and the minimum internal cutting diameter is generally 1-10 cm.
The coaxiality measuring module 4 is used for checking that the end face reflected light of the output head glass column 1-1 is coaxial with the air floatation rotary table 2 and measuring the assembly coaxiality of the glass column. As shown in FIG. 4, the coaxiality measuring module 4 comprises a light beam emitting module 4-1, a half mirror 4-2, a lens 4-3, a plane mirror 4-4, a CCD4-5 and a CCD light-sensitive surface display screen 4-6. The light beam emitting module 4-1 emits light beams with a cross reticle image to enter the half-transmitting and half-reflecting mirror 4-2, and the light beams reflected by the half-transmitting and half-reflecting mirror 4-2 enter the lens 4-3 to form parallel light beams. The plane reflector 4-4 is arranged on the air-floating turntable 2, the lens 4-3 is arranged between the semi-transparent semi-reflecting mirror 4-2 and the plane reflector 4-4, and the CCD4-5 is arranged above the semi-transparent semi-reflecting mirror 4-2. The parallel light beams are emitted to the plane reflector 4-4, and when the plane reflector 4-4 is coaxial with the axis of the air floating rotary table 2, the parallel light beams are reflected to the center of the cross reticle image of the CCD photosensitive surface display screen 4-6 to be at the original position 4-6-1.
Clamping a plane reflector 4-4 on an air-floating rotary table 2, rotating the air-floating rotary table 2 to drive the plane reflector 4-4 to rotate around the axis of the air-floating rotary table 2, contacting the surface of a centrosymmetric ring of the plane reflector 4-4 by a dial indicator 3, and adjusting X, Y and theta of the air-floating rotary table 2X、θYAnd the axis makes the value on the dial indicator 3 in the measuring range and the value is unchanged along with the rotation of the air floatation rotary table 2, and the axis of the plane reflecting mirror 4-4 is coaxial with the axis of the air floatation rotary table 2. And adjusting the positions of each part of the incident light path and the CCD4-5 to ensure that the center of the cross reticle image reflected by the plane reflector 4-4 is exactly positioned at the center of an imaging area of the CCD4-5, namely the center of a CCD light-sensitive surface display screen 4-6, and marking the center of the cross reticle image reflected by the plane reflector 4-4 at the moment as an original position 4-6-1.
Rotating the air-flotation turntable 2, forming a circular ring 4-6-3 by the central point 4-6-2 of the cross reticle image reflected by the output head glass column 1-1, and when the center of the circular ring 4-6-3 deviates from the original position 4-6-1, adjusting the light path again by using the plane mirror 4-4 to recalibrate the original position 4-6-1.
The plane reflector 4-4 is taken down, the light beam emitting module 4-1 emits a light beam with a cross reticle image to be incident on the semi-transparent semi-reflective mirror 4-2, the light beam reflected by the semi-transparent semi-reflective mirror 4-2 is incident on the lens 4-3 to form a parallel light beam and is incident on the end face of the output head glass column 1-1, the CCD4-5 receives the reflected light with the cross reticle image on the end face of the output head glass column 1-1 and sends the received cross reticle image to the CCD photosensitive surface display screen 4-6, and the assembly coaxiality parameter of the output head glass column 1-1 is calculated according to the offset of the central point 4-6-2 of the received cross reticle image and the original position 4-6-1.
The specific operation method for controlling and measuring the assembly coaxiality of the laser output head glass column is as follows:
firstly, clamping the output head metal shell 1-2 on the table top of the air floatation rotary table 2, and rotating the air floatation rotary table 2 to drive the output head metal shell 1-2 to rotate around the axis of the air floatation rotary table 2.
Step two, contacting the surface of any centrosymmetric circular ring of the metal shell 1-2 of the output head by using a dial indicator 3, and adjusting X, Y and theta of the air-floating rotary table 2X、θYAnd the shaft enables the numerical value on the dial indicator 3 to be within a measuring range and the numerical value to be unchanged along with the rotation of the air floatation rotary table 2, and the axis of the metal shell 1-2 of the output head is coaxial with the axis of the air floatation rotary table 2.
And step three, placing the output head glass column 1-1 into the output head metal shell 1-2, and continuing to rotate the air floatation rotary table 2, wherein the air floatation rotary table 2 drives the output head metal shell 1-2 and the output head glass column 1-1 to rotate. Parallel light beams with a cross-shaped differentiation plate image, which are emitted by a light beam emitting module 4-1 of a coaxiality measuring module 4, are incident on the end face of an output head glass column 1-1, end face reflected light with the cross-shaped differentiation plate image is received by an imaging module CCD4-5 in the coaxiality measuring module 4, and the imaging module CCD4-5 obtains the offset angle value of the output head glass column 1-1 relative to the axis of an output head metal shell 1-2 according to the offset of a central point 4-6-2 of the cross-shaped division plate image reflected by the received output head glass column 1-1 and an original position 4-6-1.
And adjusting the angle of the output head glass column 1-1 until the offset between the central point 4-6-2 of the cross reticle image received by the coaxiality measuring module 4 and the original position 4-6-1 is minimum, and at the moment, the end surface of the output head glass column 1-1 is vertical to the axis of the output head metal shell 1-2 to the maximum extent.
And step four, fixing the output head glass column 1-1 and the output head metal shell 1-2 under the minimum fitting circle radius by adopting glue or jackscrews and other modes to form the output head 1, and calculating the assembly coaxiality parameter of the output head glass column 1-1 according to the offset between the central point of the cross reticle image and the original position received by the coaxiality measuring module 4.
The assembly coaxiality calculation formula of the output head glass column 1-1 is as follows:
α＝d/(2*f)
wherein alpha is the assembly coaxiality, namely the inclination angle, d is the offset of the central point 4-6-2 of the cross reticle image received by the CCD photosensitive surface display screen 4-6 and the original position 4-6-1, and f is the focal length of the lens 4-3.
Claims (3)
1. The utility model provides an assembly axiality control and measuring device of laser instrument output head glass post which characterized in that: comprises an air-floating rotary table (2) used for clamping a laser output head (1) and carrying out X, Y theta on the laser output head (1)XAnd thetaYAdjusting;
the dial indicator (3) is used for verifying whether an output head metal shell (1-2) of the laser output head (1) and the air floatation rotary table (2) are coaxial or not;
the coaxiality measuring module (4) is used for verifying whether an output head glass column (1-1) of the laser output head (1) and the air floatation rotary table (2) are coaxial or not and measuring the assembly coaxiality of the output head glass column (1-1) and the output head metal shell (1-2);
the device support frame (5) is used for fixing the air floatation rotary table (2) and the coaxiality measuring module (4), and the coaxiality measuring module (4) is arranged right above the laser output head (1).
2. The apparatus for controlling and measuring the assembly coaxiality of the glass column of the output head of the laser as set forth in claim 1, wherein: the coaxiality measuring module (4) comprises a light beam transmitting module (4-1), a semi-transparent and semi-reflective mirror (4-2), a lens (4-3), a plane reflecting mirror (4-4), a CCD (4-5) and a CCD photosensitive surface display screen (4-6), the plane reflecting mirror (4-4) is arranged on the air floatation rotary table (2), the lens (4-3) is arranged between the semi-transparent and semi-reflective mirror (4-2) and the plane reflecting mirror (4-4), the CCD (4-5) is arranged above the semi-transparent and semi-reflective mirror (4-2), the light beam transmitting module (4-1) transmits a light beam with a cross reticle image to be incident to the semi-transparent and semi-reflective mirror (4-2), and the light beam reflected by the semi-transparent and semi-reflective mirror (4-2) is incident to the lens (4-3) to form a parallel light beam to be transmitted to the plane reflecting mirror (4-4), when the plane reflector (4-4) is coaxial with the axis of the air-floating rotary table (2), the plane reflector reflects back to the center of the cross reticle image of the CCD photosensitive surface display screen (4-6) as an original position (4-6-1);
adjusting the angle of an output head glass column (1-1) on the air-floating rotary table (2) until the offset between the central point (4-6-2) of the cross reticle image received by the CCD (4-5) and the original position (4-6-1) is minimum, and controlling the assembly coaxiality of the output head glass column (1-1);
according to the offset between the central point (4-6-2) of the cross reticle image reflected by the output head glass column (1-1) and the original position (4-6-1) received by the CCD (4-5), the assembly coaxiality parameter of the output head glass column (1-1) is obtained through calculation, and the assembly coaxiality of the output head glass column (1-1) is measured.
3. The apparatus for controlling and measuring the assembly coaxiality of the glass column of the output head of the laser as set forth in claim 2, wherein: and the air-floatation rotary table (2) is provided with a through hole (5-1) for the tail fiber of the laser output head (1) to pass through.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121723640.7U CN215725650U (en) | 2021-07-27 | 2021-07-27 | Assembly coaxiality control and measurement device for laser output head glass column |
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| CN202121723640.7U CN215725650U (en) | 2021-07-27 | 2021-07-27 | Assembly coaxiality control and measurement device for laser output head glass column |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701609A (en) * | 2021-07-27 | 2021-11-26 | 上海飞博激光科技有限公司 | Method and device for controlling and measuring assembly coaxiality of laser output head glass column |
| CN113701609B (en) * | 2021-07-27 | 2024-05-31 | 上海飞博激光科技股份有限公司 | Method and device for controlling and measuring assembly coaxiality of glass column of laser output head |
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2021
- 2021-07-27 CN CN202121723640.7U patent/CN215725650U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701609A (en) * | 2021-07-27 | 2021-11-26 | 上海飞博激光科技有限公司 | Method and device for controlling and measuring assembly coaxiality of laser output head glass column |
| CN113701609B (en) * | 2021-07-27 | 2024-05-31 | 上海飞博激光科技股份有限公司 | Method and device for controlling and measuring assembly coaxiality of glass column of laser output head |
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