CN112025416A - Method for preparing quasi-hexagonal blank capable of reducing cracks in inverter torsion process - Google Patents
Method for preparing quasi-hexagonal blank capable of reducing cracks in inverter torsion process Download PDFInfo
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- CN112025416A CN112025416A CN202010720529.6A CN202010720529A CN112025416A CN 112025416 A CN112025416 A CN 112025416A CN 202010720529 A CN202010720529 A CN 202010720529A CN 112025416 A CN112025416 A CN 112025416A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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Abstract
The invention provides a method for preparing a quasi-hexagonal blank for reducing cracks in the process of inverting an imager, wherein the quasi-hexagonal blank comprises a main body part and six arc-shaped grooves surrounding the edge of the main body part, the two arc-shaped grooves are connected to form six edges, the central angle of each arc-shaped groove is 2 degrees, the maximum depth of each arc-shaped groove is 0.5mm, and each edge corresponds to one end face. The invention can reduce the contact surface between the image inverter blank and the metal torsion clamp, and solves the problems of torsion angle and torsion clamping cracks which are long-term puzzled in the torsion process.
Description
Technical Field
The invention relates to the technical field of image inverters, in particular to a method for preparing a quasi-hexagonal blank for reducing cracks in the torsion process of an image inverter.
Background
The optical fiber image inverter is one of hard optical fiber device optical fiber panels, is used for inverting an image by 180 degrees and enabling the transmitted image to be an inverted image, and has the advantages of high light transmission efficiency, small interstage coupling loss, high fidelity and zero optical thickness compared with a common optical fiber panel.
The inverted image device is mainly applied to a low-light image intensifier and is a core element of a micro light pipe. The processing technological process for manufacturing the image inverter comprises the following steps: melting materials, manufacturing a rod pipe, matching the rod pipe, drawing a single wire, arranging a primary multifilament rod, drawing a primary multifilament, arranging a secondary multifilament rod, drawing a secondary multifilament rod, arranging a screen, hot-pressing, primary optical processing, twisting, secondary optical processing and testing. The torsion is a key process for manufacturing the inverter, and the shape of the blank of the inverter has an important influence on the torsion performance of the inverter and is the most key factor for limiting the torsion qualification rate of the inverter.
The process of inverting the image inverter is to clamp the image inverter blanks with different shapes to a special metal twisting clamp and put the metal twisting clamp into a high-temperature twisting furnace to twist by 180 degrees. At present, the torsion clamping in the industry is generally a regular hexagon blank clamping method, the method has the advantages of normal-temperature clamping, high-temperature torsion, normal-temperature unclamping and low production efficiency, and the torsion time is about 2 hours per square by adopting a normal-temperature feeding and normal-temperature discharging mode.
In order to improve the efficiency, a new method of normal-temperature clamping, high-temperature preheating of an annealing furnace, high-temperature torsion of a high-temperature furnace and high-temperature annealing treatment after torsion is introduced in the prior art, the torsion time is reduced to 20 minutes per piece, and the production efficiency is improved by 6 times.
However, the blank which enters and exits at high temperature and the torsion fixture clamp the torsion converter at high temperature, the metal torsion fixture is required to clamp the blank to enter and exit the torsion converter, the contact surface between the regular hexagonal blank and the hexagonal metal torsion fixture is too many, the blank is clamped, heated, twisted and cooled, cracks are easy to generate, and the regular hexagonal blank is required to be processed on a special milling and grinding machine, so that the labor and the time are wasted, and the torsion qualified rate is low.
Prior art documents:
the quality of the optical fiber image inverter is discussed in the society of Japan, Shanxi science and application technology, 2012, 27-4.
Disclosure of Invention
The invention aims to solve the problem of cracks in the inverting process of an inverter, provides a method for preparing a quasi-hexagonal blank for reducing the cracks in the inverting process of the inverter, reduces the contact surface between the blank of the inverter and a metal twisting clamp, and solves the problems of twisting angle and twisting clamping cracks which are long-term puzzled in the inverting process.
In order to achieve the purpose, the invention provides a method for preparing a hexagon-like blank for reducing cracks in the process of inverting an image inverter, wherein the hexagon-like blank is provided with a subject part and six arc-shaped grooves surrounding the edge of a main body part, every two arc-shaped grooves are connected to form six edges, the central angle of each arc-shaped groove is 2 degrees, the maximum depth of each arc-shaped groove is 0.5mm, and each edge corresponds to one end face;
the preparation process comprises the following steps:
a. averagely dividing an inner rotating bearing of a workpiece spindle connecting flange plate of the cylindrical grinding machine into six equal parts and marking;
b. making corresponding marking lines at the fixed part of the workpiece spindle by using six marking lines on the end surface of the inward turning bearing;
c. fixing a part to be processed on an external grinding machine;
d. after the concentricity is corrected, grinding and rounding to the required circular size;
e. turning off the axial rotation motion of the workpiece;
f. rotating the flange plate to make the mark line of the inner rotating bearing coincide with the mark line of the outer fixed part;
g. the radial feed grinds the workpiece to the size of one end surface of an approximate hexagon;
h. shifting the flange plates according to the mark number sequence, aligning the mark lines one by one, and processing the other five end faces to obtain an approximate regular hexagon;
i. clamping the approximately regular hexagon blank into a hexagonal torsion clamp;
j. placing the hexagonal torsion fixture into an annealing furnace for preheating;
k. placing the approximately regular hexagon blank into a high-temperature torsion furnace to be twisted for 180 degrees;
and l, putting the blank after the approximate regular hexagon is twisted into an annealing furnace for annealing.
According to the technical scheme, the similar-hexagon blank for reducing cracks in the inverting device torsion process and the preparation method thereof are provided, the similar-hexagon blank is machined by using a common cylindrical grinder, then the similar-hexagon blank is clamped to a special torsion clamp, and the similar-hexagon blank is placed into a high-temperature torsion furnace to be twisted for 180 degrees. The problems of torsion angle and torsion clamping cracking which are puzzled for a long time in the torsion process are solved, the qualification rate of the torsion process is improved from 70% to more than 90%, and the production efficiency is greatly improved.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent. In addition, all combinations of claimed subject matter are considered a part of the presently disclosed subject matter.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic view of a hexagon-like blank of an exemplary embodiment of the present invention. Wherein a is the central angle of the arc-shaped slot. The shaded part is a non-working area of the quasi-hexagonal blank and is used for supporting and fixing the whole quasi-hexagonal blank during preparation. Wherein A is the maximum depth of the arc-shaped slot and is 0.5 mm;
figure 2 is a side view of the hexagon-like blank of the embodiment of figure 1 along a central axis. C is a chamfer angle, X is the width of the middle slot, and Y is the depth of the middle slot.
FIG. 3 is a schematic illustration of the processing of an embodiment of the present invention. Wherein 10 is the inner rotary bearing of the cylindrical grinder, 20 is the inner rotary bearing marking line, 30 is the inner rotary bearing external fixation spare of the cylindrical grinder, 40 is the bearing external fixation marking line, 50 is the mark number.
Detailed Description
In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any one implementation. In addition, some aspects of the present disclosure may be used alone, or in any suitable combination with other aspects of the present disclosure.
In combination with the figure, the invention provides a method for preparing a hexagon-like blank for reducing cracks in the process of twisting an image inverter, wherein the novel hexagon-like blank is provided with a subject part and six arc-shaped grooves surrounding the edge of a main body part, every two arc-shaped grooves are connected to form six edges, the central angle of each arc-shaped groove is about 2 degrees, the maximum depth of each arc-shaped groove is 0.5mm, and each edge corresponds to one end face.
After the reshaping, as shown in connection with fig. 1-3, the blank can still be held by existing clamps without loosening and without the need for individually customizing the clamp structure. Meanwhile, in the preferred embodiment, the edge of the quasi-hexagonal blank is provided with a chamfer (C position) which is matched with the tool clamp, so that edge breakage is avoided.
Therefore, when the clamp is matched for high-temperature torsion, the arc-shaped groove reduces the contact area with the clamp. Wherein, the larger the width of the middle slot, the larger the torsion area.
As shown in FIG. 2, the width and depth of the intermediate slot are maintained at appropriate levels, for example, the width X is maintained at 10mm and the depth Y is maintained at 1.2 mm. (the intermediate notch may be removed if it is not so much related to the crack)
Referring to fig. 3, an exemplary process for preparing a hexagonal-like blank according to the present invention includes the following steps:
a. equally dividing the inner rotary bearing 10 of the cylindrical grinding machine workpiece spindle connecting flange plate into six equal parts and marking, as shown in fig. 3 reworked 1-6;
b. six marking lines 20 on the end surface of the inner rotary bearing are used for making corresponding marking lines at the fixed part of the workpiece main shaft;
c. fixing the circular blank of the inverted image device hexagonal screen section after the rough grinding of the excircle on the cylindrical grinding machine 30;
d. after the concentricity is corrected, grinding and rounding to the required circular size;
e. turning off the axial rotation motion of the workpiece;
f. rotating the flange plate to make the mark line of the inner rotary bearing coincide with the mark line 40 of the outer fixed part;
g. the radial feed grinds the workpiece to the size of one end surface of an approximate hexagon;
h. shifting the flange plates according to the mark number sequence, aligning the mark lines one by one, and processing the other five end faces to obtain an approximate regular hexagon;
i. clamping the approximately regular hexagon blank into a hexagonal torsion clamp;
j. placing the hexagonal torsion clamp into an annealing furnace for preheating, wherein the preheating temperature is 600 ℃;
k. placing the approximately regular hexagon blank into a high-temperature torsion furnace to be twisted for 180 degrees;
and l, putting the blank after the similar regular hexagon is twisted into an annealing furnace for annealing, wherein the annealing temperature is 600 ℃, and the annealing time is 8 hours.
Preferably, before twisting, the edge of each side corresponding to the end face is chamfered. The chamfer has a dimension of 0.5mm and an angle of 45 °. Chamfer and frock clamp phase-match avoid appearing broken edge.
The following description will be made by taking a blank of an image inverter with a length of 25.4mm and a length of 24.8mm as an example, and the manufacturing process of the blank is as follows:
(1) coarsely grinding the excircle of the image inverter blank screen section and then fixing the image inverter blank screen section on an excircle grinding machine;
(2) after the concentricity is corrected, the outer circle is processed to the required circular size phi 27mm plus or minus 0.5mm according to the normal grinding;
(3) turning off the axial rotation motion of the workpiece;
(4) rotating the flange plate to enable the No. 1 marking line of the inner rotating bearing to be superposed with the marking line of the outer fixing part;
(5) the radial feed is 0.8mm, and the workpiece is ground to the size of one end face of a required approximate hexagon;
(6) shifting the flange plates according to the mark number sequence, and aligning the mark lines one by one to process the other five end faces;
(7) chamfering the blank of the image inverter;
(8) carrying out middle grooving on an edge grinding machine;
(9) clamping the approximately regular hexagon blank into a special hexagonal torsion clamp;
(10) placing the torsion clamp into an annealing furnace for preheating;
(11) placing the approximately regular hexagon blank into a high-temperature torsion furnace to be twisted for 180 degrees;
(12) and placing the blank which is approximately in the shape of a regular hexagon after torsion into an annealing furnace for annealing.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (5)
1. The preparation method of the quasi-hexagonal blank for reducing cracks in the inverting device torsion process is characterized in that the quasi-hexagonal blank is provided with a main body part and six arc-shaped grooves surrounding the edges of the main body part, every two arc-shaped grooves are connected to form six edges, the central angle of each arc-shaped groove is about 2 degrees, the maximum depth of each arc-shaped groove is 0.5mm, and each edge corresponds to one end face;
the preparation process comprises the following steps:
a. averagely dividing an inner rotating bearing of a workpiece spindle connecting flange plate of the cylindrical grinding machine into six equal parts and marking;
b. making corresponding marking lines at the fixed part of the workpiece spindle by using six marking lines on the end surface of the inward turning bearing;
c. fixing a part to be processed on an external grinding machine;
d. after the concentricity is corrected, grinding and rounding to the required circular size;
e. turning off the axial rotation motion of the workpiece;
f. rotating the flange plate to make the mark line of the inner rotating bearing coincide with the mark line of the outer fixed part;
g. the radial feed grinds the workpiece to the size of one end surface of an approximate hexagon;
h. shifting the flange plates according to the mark number sequence, aligning the mark lines one by one, and processing the other five end faces to obtain an approximate regular hexagon;
i. clamping the approximately regular hexagon blank into a hexagonal torsion clamp;
j. placing the hexagonal torsion fixture into an annealing furnace for preheating;
k. placing the approximately regular hexagon blank into a high-temperature torsion furnace to be twisted for 180 degrees;
and l, putting the blank after the approximate regular hexagon is twisted into an annealing furnace for annealing.
2. The method of claim 1, wherein the edge of each side corresponding to the end face is chamfered, the chamfer having a dimension of 0.5mm and an angle of 45 °.
3. The method of making a hexagonal-like blank with reduced cracking during an inverter torsion process of claim 1, wherein the preheating temperature in step j reaches 600 ℃.
4. The method for preparing a hexagonal blank for reducing cracks in an inverter torsion process according to claim 1, wherein the annealing temperature in the step i is 600 ℃ and the annealing time is 10 hours.
5. The method for preparing a hexagonal blank for reducing cracks in an inverter torsion process according to claim 1, wherein the part to be processed in the step c is a round blank after rough grinding of the outer circle of the hexagonal screen of the inverter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010720529.6A CN112025416B (en) | 2020-07-24 | 2020-07-24 | Method for preparing quasi-hexagonal blank capable of reducing cracks in inverter torsion process |
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| CN202010720529.6A CN112025416B (en) | 2020-07-24 | 2020-07-24 | Method for preparing quasi-hexagonal blank capable of reducing cracks in inverter torsion process |
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| CN112025416B CN112025416B (en) | 2021-07-02 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030095765A1 (en) * | 2001-11-20 | 2003-05-22 | James Triba | Multi-component, fused optical fiber image conduit and method of fabrication |
| CN101702044A (en) * | 2009-11-12 | 2010-05-05 | 山西长城微光器材股份有限公司 | Optical fiber image inverter rotary torsion processing technology |
| CN101819295A (en) * | 2010-04-16 | 2010-09-01 | 广州宏晟光电科技有限公司 | Rotating and twisting method and device of optical fiber image inverter |
| CN203630389U (en) * | 2013-12-28 | 2014-06-04 | 山西长城微光器材股份有限公司 | Fiber image inverter torsion fixture |
| CN203779151U (en) * | 2014-04-04 | 2014-08-20 | 广州市攀森机械设备制造有限公司 | Precise indexing machining tool for shaft like parts |
| CN206133060U (en) * | 2016-10-14 | 2017-04-26 | 中国建筑材料科学研究总院 | Rotatory differential of optic fibre image inverter twists reverse forming device |
| CN108287392A (en) * | 2018-03-08 | 2018-07-17 | 广州宏晟光电科技股份有限公司 | A kind of conical fiber image inverter and preparation method thereof |
-
2020
- 2020-07-24 CN CN202010720529.6A patent/CN112025416B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030095765A1 (en) * | 2001-11-20 | 2003-05-22 | James Triba | Multi-component, fused optical fiber image conduit and method of fabrication |
| CN101702044A (en) * | 2009-11-12 | 2010-05-05 | 山西长城微光器材股份有限公司 | Optical fiber image inverter rotary torsion processing technology |
| CN101819295A (en) * | 2010-04-16 | 2010-09-01 | 广州宏晟光电科技有限公司 | Rotating and twisting method and device of optical fiber image inverter |
| CN203630389U (en) * | 2013-12-28 | 2014-06-04 | 山西长城微光器材股份有限公司 | Fiber image inverter torsion fixture |
| CN203779151U (en) * | 2014-04-04 | 2014-08-20 | 广州市攀森机械设备制造有限公司 | Precise indexing machining tool for shaft like parts |
| CN206133060U (en) * | 2016-10-14 | 2017-04-26 | 中国建筑材料科学研究总院 | Rotatory differential of optic fibre image inverter twists reverse forming device |
| CN108287392A (en) * | 2018-03-08 | 2018-07-17 | 广州宏晟光电科技股份有限公司 | A kind of conical fiber image inverter and preparation method thereof |
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