CN112157272A - Machining method and device for polygon scanning mirror - Google Patents
Machining method and device for polygon scanning mirror Download PDFInfo
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- CN112157272A CN112157272A CN202011014953.5A CN202011014953A CN112157272A CN 112157272 A CN112157272 A CN 112157272A CN 202011014953 A CN202011014953 A CN 202011014953A CN 112157272 A CN112157272 A CN 112157272A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
- B23B29/24—Tool holders for a plurality of cutting tools, e.g. turrets
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- B23B29/323—Turrets with power operated angular positioning devices
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Abstract
The invention discloses a processing method for a polygon scanning mirror, which drives a polygon scanning mirror blank to carry out angle indexing rotation through an index plate; the dividing disc and the polygonal scanning mirror blank can move linearly along the Z axis of the machine tool; adjusting the axial and radial positions of the three cutter teeth on the fly cutter disc to ensure that the extending heights of the three cutter teeth in the axial direction of the cutter disc have height difference and the radial distances from the three cutter teeth to the center of the cutter disc have distance difference, so as to realize the one-time feeding to finish the rough machining, semi-finish machining and finish machining processes of the current machining surface of the polygonal scanning mirror blank; the method comprises the following steps of leveling one processing surface of a polygonal scanning mirror blank, and processing the leveled processing surface by a flying cutter disc in one step; after the processing is finished, the index plate drives the polygon scanning mirror blank to rotate to the next processing surface for continuous processing, and the process is circulated until all the processing surfaces of the polygon scanning mirror blank are processed. The invention is beneficial to obviously improving the processing efficiency of the working surface of the polygon scanning mirror.
Description
Technical Field
The invention relates to the technical field of ultra-precision machining, in particular to a machining method and a machining device for a polygon scanning mirror.
Background
Polygonal laser scanning techniques are widely used, for example, for laser marking and printing, laser radar, film recording, and laser projection, as well as bar code scanning, densitometry, web inspection, and agricultural inspection. The polygon scanning mirror is a key part of the polygon laser scanning technology. Fig. 1 shows the application of the polygon scanning mirror in the biomedical imaging field.
The polygon scanning mirror has three or more reflecting surfaces, and rotates around a fixed shaft at a high speed (the highest speed can reach 50000 turns) in the working process to realize the reciprocating scanning of laser beams, thereby realizing the high-speed, high-efficiency and precise single-axis scanning of a target. The manufacturing accuracy of the polygon mirror directly determines the relative performance of the scanning system, including dynamic tracking error, speed stability, dynamic balance, verticality and simultaneity, etc. For example, an error in the angle between the sides of the polygon scanning turning mirror can cause timing errors (when the turning mirror turns from one side to the next); the parallelism of the plane where the polygon side is located and the axis of the cylinder externally connected with the polygon can influence the dynamic tracking error of the scanning system; the flatness of the facets where the polygon edges are located affects the focusing characteristics of the laser spot. Therefore, extremely high requirements are placed on the processing precision, and the flatness of several surfaces of the polygonal side is required to be better than λ/10(λ is 633nm), and the surface roughness is required to be nano-scale. To achieve such high machining accuracy, it is necessary to use an ultra-precision machining method. However, the surface of the polygon scanning mirror is easy to distort and deform during the processing process, which severely limits the processing precision and efficiency of the polygon scanning mirror. Therefore, it is important to study a manufacturing method with high efficiency and high accuracy.
The machining of the polygon scanning mirror is currently generally realized by a traditional polishing method and single-point diamond turning, and the two methods have advantages and disadvantages respectively.
1. The scanning mirror processed by the traditional polishing method has good surface roughness, but the polishing method has a limited range of processing materials, and cannot be directly used for processing an aluminum mirror.
2. The mirror surface roughness after the single-point diamond turning method is lower than that of the traditional polishing method, but the single-point diamond turning efficiency is very high, and the single-point diamond turning method is very suitable for cutting materials such as aluminum, copper and plastics. Therefore, single-point diamond cutting becomes a main method for processing the polygon scanning mirror, and toshiba machinery company develops special diamond cutting equipment for processing the polygon scanning mirror so as to realize high-efficiency and high-precision processing of the polygon scanning mirror. Machining of polygonal turning mirrors was also accomplished using single point diamond turning Technology, Symons Mirror Technology, uk. The specific technical details of the diamond turning process of the polygon scanning mirror of two companies are not reported in public. However, the machining efficiency of the conventional machining method of the polygon scanning mirror by the single-point diamond turning method needs to be further improved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a method and a device for processing a polygon scanning mirror, which solve the problems that the traditional processing method of the polygon scanning mirror has low processing efficiency, and particularly relates to a method for processing the polygon scanning mirror by combining a high-precision index plate, a high-precision lathe and a finely-adjustable cutting tool.
The invention is realized by the following technical scheme:
a method of machining a polygon scanning mirror, comprising the steps of:
step A, driving a polygon scanning mirror blank to perform angle indexing rotation through an indexing disc; the index plate and the polygonal scanning mirror blank are coaxially arranged on a machine tool workbench and linearly move along the Z axis of the machine tool, so that the fly-cutting knife plate axially feeds relative to the polygonal scanning mirror blank;
b, adjusting the axial and radial positions of the three cutter teeth on the fly cutter disc to enable the three cutter teeth to have height difference in the axial extending height of the cutter disc and the radial distances from the three cutter teeth to the center of the cutter disc to have distance difference so as to meet different cutting depth requirements of different cutter teeth and realize one-time feeding to finish the rough machining, semi-finish machining and finish machining processes of the current machining surface of the polygonal scanning mirror blank; in the machining process, the fly-cutting cutter disc is driven to rotate by the main shaft of the machine tool;
c, leveling one processing surface of the polygonal scanning mirror blank, and processing the leveled processing surface by one-step walking through a flying cutter disc; after the processing is finished, the index plate drives the polygon scanning mirror blank to rotate to the next processing surface for continuous processing, and the process is circulated until all the processing surfaces of the polygon scanning mirror blank are processed.
The existing three/four-axis high-precision diamond cutting equipment cannot simultaneously carry out indexing and machining on the polygon scanning mirror. In addition, the rough/semi-fine/fine machining needs to be finished by multiple feed in the machining process, and the improvement of the machining efficiency of the scanning mirror is severely restricted. Aiming at the processing problem of the polygon scanning rotating mirror, the invention can obviously improve the processing efficiency of a plurality of working surfaces of the polygon scanning mirror by improving the processing process:
(1) the invention realizes the angle division of the polygon laser scanning mirror in the processing process through the high-precision division disc, thereby ensuring the angle tolerance. The polygon scanning mirror is clamped on the table top of the high-precision index plate through a specific clamp, and the coaxial axis of the polygon laser scanning mirror and the coaxial axis of the table top of the high-precision index plate are ensured. And leveling a certain working surface to be processed of the polygon scanning mirror, and processing the leveled rotating mirror surface through a flying cutting cutter disc of the ultra-precise cutting machine tool. After the processing is finished, the index plate is rotated according to the angle of the polygon scanning mirror, the changeable new scanning mirror is rotated to a specific station at the same time, the processing of the other surface is realized, and the process is circulated until the processing of all polygon surfaces is finished.
(2) The invention uses the finely adjustable fly-cutting cutter disc to realize the procedures of rough machining, semi-finish machining and finish machining of one surface of the rotating mirror by one-time feeding. The fly-cutting cutter disc used by the invention can realize the fine adjustment of the height difference among a plurality of cutter teeth, thereby meeting different cutting depth requirements of different cutters and meeting different cutting depth requirements of rough machining, semi-finish machining and finish machining. Meanwhile, fine adjustment of the center distance from a plurality of cutter teeth to the cutter head can be realized, and further different radial cutting depths of rough machining, semi-finish machining and finish machining procedures can be met. Therefore, the integration of rough machining, semi-finish machining and finish machining processes of one surface of the polygon scanning mirror can be realized through one-time feeding, and further, the efficient and high-precision machining of the polygon scanning mirror is realized.
Preferably, the index plate is provided with two or more polygon scanning mirror blanks, and the two or more polygon scanning mirror blanks are coaxially arranged with the index plate.
The invention can superpose and install a plurality of polygon scanning mirrors on the index plate, and the axes of the polygon scanning mirrors are superposed, thus, the invention can process a certain working surface of the polygon scanning mirrors by feeding along the axial direction of the index plate once, and the processing efficiency is further obviously improved.
Preferably, two or more polygon scanning mirror blanks are pressed and fixed on the dividing plate through nuts.
According to the invention, a plurality of polygon scanning mirror blanks are arranged on the index plate and then are screwed on the index plate through the nuts, so that all the polygon scanning mirror blanks are pressed and fixed, the structure is simple, and the operation is convenient.
More preferably, the rotating shaft of the fly cutter disc is perpendicular to the axis of the dividing disc.
A processing device is used for realizing the processing method for the polygon scanning mirror, and comprises a machine tool main shaft, an index plate and a fly-cutting cutter head; the index plate is provided with a clamp, and the clamp is used for mounting a polygonal scanning mirror blank; the output end of the machine tool spindle is provided with a fly-cutting cutter head; the fly cutter disc comprises a cutter disc, three cutter bars are arranged on the cutter disc, all the cutter bars are uniformly distributed on the end surface of the cutter disc along the circumferential direction to form a circular ring structure, and the fly cutter disc also comprises a wedge block and a plurality of gaskets with different thickness specifications; a mounting groove is formed in the outer wall of the cutter head and close to the end face, and a wedge block is arranged on the inner wall of the bottom end of the mounting groove in the axial direction of the cutter head; a gasket with a thickness specification is arranged on the inner wall of the bottom end of the mounting groove along the radial direction of the cutter head; the bottom end face of the cutter bar is an inclined plane, and the inclined plane at the bottom end of the cutter bar is matched with the inclined plane of the wedge-shaped block; the top end of the cutter bar is used for mounting cutter teeth, and the inner side wall of the cutter bar is in pressing contact with the gasket; the inclined surfaces of the wedge-shaped block and the cutter bar are opposite in inclination direction and are in the radial direction of the cutter head; the wedge passes through the regulating part effect, realizes that the radial reciprocating motion along the blade disc drives in the mounting groove, realizes adjusting the ascending size of height of cutter arbor in the axial of blade disc.
According to the device provided by the invention, the polygon scanning mirror is driven to synchronously rotate by the dividing disc, so that the purpose of switching the to-be-processed working surface of the polygon scanning mirror is realized; the fly-cutting cutter disc is driven to rotate through the main shaft of the machine tool, and the polygon scanning mirror is machined.
The invention provides a method for realizing the integration of rough/semi-fine/fine machining processes by innovatively designing a cutting tool, and finishing the rough/semi-fine/fine machining of a scanning mirror by one-time feeding. In order to complete the rough/semi-fine/fine machining of the polygon scanning mirror by one-time feeding, at least three different cutter teeth are required to be arranged on the same cutter body and are respectively used for the rough/semi-fine/fine machining of the scanning mirror. Because the rough cutting depth, the semi-fine cutting depth and the finish cutting depth are different, the height difference exists between the cutter teeth in the cutting depth direction, and therefore the designed cutter needs to realize the adjustable height difference between the cutter teeth. All cutter tooth feed rates are the same due to the use of a uniform cutter body, but the radial cutting depth of the cutter teeth for semi-finishing cannot exceed that of the cutter teeth for rough machining, and similarly, the radial cutting depth of the cutter teeth for finishing cannot exceed that of the cutter teeth for semi-finishing. Therefore, the cutter teeth of the designed cutter are required to be adjustable in the radial direction. The working principle of the invention is as follows:
adjusting the radial cutting depth of the cutter teeth: the adjustment is realized by the matching of the selection of the gasket and the wedge-shaped block. Selecting a gasket with a proper thickness specification, wherein the larger the thickness of the gasket is, the farther the distance between the cutter bar and the axis of the cutter disc is in the radial direction of the cutter disc; the smaller the thickness of the gasket is, the closer the distance between the cutter bar and the axis of the cutter disc is in the radial direction of the cutter disc; in order to ensure the contact and adaptation of the inclined surface of the wedge block and the inclined surface of the bottom end of the cutter rod, the position of the wedge block needs to be correspondingly adjusted.
Adjusting the height of the cutter teeth in the depth cutting direction: the position of the wedge-shaped block is adjusted. Taking the example that the inclined plane of the wedge-shaped block inclines downwards towards the center of the cutter head along the radial direction of the cutter head, the inclined plane at the bottom end of the cutter rod inclines upwards towards the center of the cutter head along the radial direction of the cutter head; the wedge block moves towards the center of the cutter head by adjusting the position of the wedge block in the radial direction of the cutter head, the inclined surface of the wedge block interacts with the inclined surface at the bottom end of the cutter bar to jack the cutter bar upwards, and the position of cutter teeth arranged at the top end of the cutter bar is increased; on the contrary, the wedge block moves back to the center of the cutter head by adjusting the radial position of the wedge block along the cutter head, the inclined surface of the wedge block interacts with the inclined surface at the bottom end of the cutter rod, the cutter rod moves downwards under the action of the gravity of the cutter rod, and the position of the cutter teeth arranged at the top end of the cutter rod is adjusted to be low. After the position of the cutter bar is adjusted, the cutter bar is fixed on the cutter head.
Preferably, the cutter head is provided with at least three cutter bars, and all the cutter bars are arranged on the end surface of the cutter head at equal intervals along the circumferential direction and are in a circular structure; each cutter bar is used for mounting a cutter tooth.
The number of the cutter bars on the cutter head can be set according to the machining requirements, and rough machining and finish machining can be completed at the same time, or rough machining, semi-finish machining and finish machining can be completed at the same time. In order to ensure the stress balance of the cutter in the cutting process, the cutter head is preferably designed to be a disc, and the cutter bars are distributed on the cutter head at equal intervals.
Further preferably, the adjusting piece comprises a screw III, and the wedge block is fixed in the mounting groove through the screw III; one end of the screw III is in threaded connection with the inner wall of the mounting groove after penetrating through the wedge block.
The wedge-shaped block is adjusted in position through the threaded connection structure of the screw, and the wedge-shaped block adjusting device is simple in structure and convenient to operate.
Further preferably, the cutter bar is pressed and fixed in the mounting groove through a screw II.
The cutter bar is arranged in the mounting groove of the cutter head through a structure capable of loosening and fixing, so that the cutter bar can be fixed on the cutter head in the machining process, and meanwhile, the cutter bar is convenient to loosen and move in the position in the adjusting process. This embodiment uses a threaded connection.
Further preferably, the screwdriver further comprises a screwdriver tooth, wherein the screwdriver tooth is provided with a mounting hole, and the screwdriver tooth penetrates through the mounting hole through a screw I and then is in threaded connection with the top end of the screwdriver rod.
The cutter teeth are used for turning the working surface of the polygonal scanning mirror.
Further preferably, the cutter head is of a cylindrical structure; the outer circumference lateral wall of blade disc is equipped with a plurality of regulation holes, and all regulation holes are along blade disc circumference evenly distributed, and the regulation hole is used for installing the counterweight.
The dynamic balance adjusting device is characterized in that a plurality of adjusting holes are formed in the side wall of the outer circumference of the cutter head and used for installing the balancing weight, so that the dynamic balance adjusting of the fly-cutting cutter head is realized.
The invention has the following advantages and beneficial effects:
1. the invention realizes the angle division of the polygon laser scanning mirror in the processing process through the high-precision division disc, thereby ensuring the angle tolerance. The polygon scanning mirror is clamped on the table top of the high-precision index plate through a specific clamp, and the coaxial axis of the polygon laser scanning mirror and the coaxial axis of the table top of the high-precision index plate are ensured. And leveling a certain working surface to be processed of the polygon scanning mirror, and processing the leveled rotating mirror surface through a flying cutting cutter disc of the ultra-precise cutting machine tool. After the processing is finished, the index plate is rotated according to the angle of the polygon scanning mirror, the changeable new scanning mirror is rotated to a specific station at the same time, the processing of the other surface is realized, and the process is circulated until the processing of all polygon surfaces is finished.
2. The invention uses the finely adjustable fly-cutting cutter disc to realize the procedures of rough machining, semi-finish machining and finish machining of one surface of the rotating mirror by one-time feeding. The fly-cutting cutter disc used by the invention can realize the fine adjustment of the height difference among a plurality of cutter teeth, thereby meeting different cutting depth requirements of different cutters and meeting different cutting depth requirements of rough machining, semi-finish machining and finish machining. Meanwhile, fine adjustment of the center distance from a plurality of cutter teeth to the cutter head can be realized, and further different radial cutting depths of rough machining, semi-finish machining and finish machining procedures can be met. Therefore, the integration of rough machining, semi-finish machining and finish machining processes of one surface of the polygon scanning mirror can be realized through one-time feeding, and further, the efficient and high-precision machining of the polygon scanning mirror is realized.
3. According to the device provided by the invention, the polygon scanning mirror is driven to synchronously rotate by the dividing disc, so that the purpose of switching the to-be-processed working surface of the polygon scanning mirror is realized; the fly-cutting cutter disc is driven to rotate through the main shaft of the machine tool, and the polygon scanning mirror is machined. The invention provides a method for realizing the integration of rough/semi-fine/fine machining processes by innovatively designing a cutting tool, and finishing the rough/semi-fine/fine machining of a scanning mirror by one-time feeding. In order to complete the rough/semi-fine/fine machining of the polygon scanning mirror by one-time feeding, at least three different cutter teeth are required to be arranged on the same cutter body and are respectively used for the rough/semi-fine/fine machining of the scanning mirror. Because the rough cutting depth, the semi-fine cutting depth and the finish cutting depth are different, the height difference exists between the cutter teeth in the cutting depth direction, and therefore the designed cutter needs to realize the adjustable height difference between the cutter teeth. All cutter tooth feed rates are the same due to the use of a uniform cutter body, but the radial cutting depth of the cutter teeth for semi-finishing cannot exceed that of the cutter teeth for rough machining, and similarly, the radial cutting depth of the cutter teeth for finishing cannot exceed that of the cutter teeth for semi-finishing. Therefore, the cutter teeth of the designed cutter are required to be adjustable in the radial direction.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of a polygon laser scanning mirror applied in the field of biomedical imaging.
FIG. 2 is a view of a polygon scanning mirror; fig. 2(a) and 2(b) show polygon scanning mirrors having different shapes, and fig. 2(c) is a view showing how the polygon scanning mirrors are mounted.
Fig. 3 is a schematic structural diagram of a processing device according to the present invention.
Fig. 4 is a schematic perspective view of a fine-tunable tool according to the present invention.
Fig. 5 is a schematic view of the structure of the tool bar of the present invention.
Reference numbers and corresponding part names in the drawings: 1-dividing disc cushion disc, 2-bracket, 3-dividing disc, 4-clamp, 5-polygon scanning mirror blank, 6-fly cutting cutter disc, 61-cutter disc mounting hole, 62-cutter tooth, 63-screw I, 64-screw II, 65-cutter disc, 66-cutter bar, 67-inclined plane block, 68-screw III, 69-adjusting hole, 7-adapter disc, 8-machine tool spindle, and 9-machine tool workbench.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
The embodiment provides a processing method for a polygon scanning mirror, which comprises the following specific steps:
step A, driving a polygon scanning mirror blank to perform angle indexing rotation through an indexing disc; the index plate and the polygonal scanning mirror blank are coaxially arranged on a machine tool workbench and linearly move along the Z axis of the machine tool, so that the fly-cutting knife plate axially feeds relative to the polygonal scanning mirror blank;
b, adjusting the axial and radial positions of the three cutter teeth on the fly cutter disc to enable the three cutter teeth to have height difference in the axial extending height of the cutter disc and the radial distances from the three cutter teeth to the center of the cutter disc to have distance difference so as to meet different cutting depth requirements of different cutter teeth and realize one-time feeding to finish the rough machining, semi-finish machining and finish machining processes of the current machining surface of the polygonal scanning mirror blank; in the machining process, the fly-cutting cutter disc is driven to rotate by the main shaft of the machine tool;
c, leveling one processing surface of the polygonal scanning mirror blank, and processing the leveled processing surface by one-step walking through a flying cutter disc; after the processing is finished, the index plate drives the polygon scanning mirror blank to rotate to the next processing surface for continuous processing, and the process is circulated until all the processing surfaces of the polygon scanning mirror blank are processed.
Preferably, two or more polygonal scanning mirror blanks are arranged on the index plate, the two or more polygonal scanning mirror blanks are coaxially arranged with the index plate, and the two or more polygonal scanning mirror blanks are tightly pressed and fixed on the index plate through nuts. In addition, in the machining process, the rotating shaft of the fly-cutting cutter disc is arranged to be perpendicular to the axis of the dividing disc.
Example 2
This embodiment provides a machining apparatus for implementing the machining method for a polygon scanning mirror described in embodiment 1. The machining device comprises a machine tool spindle 8, a fly-cutting cutter disc 6, an index disc 3 and a support 2;
the output end of the machine tool spindle 8 is provided with a fly cutter disc 6 through a switching disc 7; the index plate 3 is arranged on the support 2, and the support 2 is fixed on a machine tool workbench 9 through an index plate pad 1 and is used for adjusting the distance from the center of the index plate 3 to the axis of a machine tool spindle 8; the output end of the dividing disc 3 is provided with a clamp 4, and a polygonal scanning mirror blank 5 is arranged on the clamp 4.
The fly cutter disc 6 comprises a cutter disc 65, and the cutter disc 65 is of a disc structure. The cutter head 65 is provided with four cutter bars 66, all the cutter bars 66 are uniformly distributed on the end surface of the cutter head 65 along the circumferential direction at equal intervals to form a circular ring structure, the cutter head further comprises a wedge-shaped block 67 and a plurality of gaskets with different thickness specifications, and the distance between the cutter bars 66 and the cutter teeth 62 to the axis of the cutter head 65 is adjusted through the gaskets. An installation groove is formed in the outer wall of the cutter head 65 and close to the end face, and a wedge-shaped block 67 is arranged on the inner wall of the bottom end of the installation groove in the axial direction of the cutter head 65; and a gasket with a thickness specification is arranged on the inner wall of the bottom end of the mounting groove along the radial direction of the cutter head 65.
The bottom end face of the cutter bar 66 is an inclined plane, the inclined plane is a plane with a certain inclination, and the inclined plane at the bottom end of the cutter bar 66 is matched with the inclined plane of the wedge-shaped block 67; the top end of the cutter bar 66 is used for installing the cutter teeth 62, and the inner side wall of the cutter bar 66 is in pressing contact with the gasket. The inclined surfaces of the block 67 and the cutter bar 66 are opposite in inclination direction and are in the radial direction of the cutter head 65; wedge 67 passes through the regulating part effect, realizes that the radial reciprocating motion along blade disc 65 drives in the mounting groove, realizes adjusting the ascending magnitude of height of cutter arbor 36 in the axial of blade disc 65.
The wedge block 67 is adjusted in the radial direction of the cutter head 65, the wedge block 67 presses the inclined surface of the cutter rod 66, so that the cutter rod 66 moves in the axial direction of the cutter head 65, the height of the cutter point is adjusted, after the height is adjusted, the cutter rod 66 is fixed in the installation groove, and the height difference among the cutter point can be adjusted by adjusting the position of the wedge block corresponding to each cutter rod 66.
Example 3
The improved structure is further improved on the basis of the embodiment 2, four cutter bars 66 are arranged on the cutter head 65, all the cutter bars 66 are arranged on the end surface of the cutter head 65 at equal intervals along the circumferential direction to form a circular ring structure, one cutter tooth 62 is installed on each cutter bar 66, and a screw I63 penetrates through the installation hole and then is in threaded connection with the top end of each cutter bar 66.
The adjusting piece adopts a screw III68, and the wedge-shaped block 67 is fixed in the mounting groove through a screw III 68; one end of the screw III68 penetrates through the wedge block 67 and then is in threaded connection with the inner wall of the mounting groove. The cutter bar 66 is pressed and fixed in the mounting groove through a screw II 64.
A plurality of adjusting holes 69 are formed in the side wall of the outer circumference of the cutter disc 65, all the adjusting holes 69 are distributed at equal intervals along the circumferential direction of the cutter disc 65, and the adjusting holes 69 are used for installing balance weights.
The method enables the high-precision index plate 3 to rotate around the axis based on the single-point diamond ultra-precision cutting machine tool, the rotation resolution is 1 degree, and the repeated positioning precision is 0.05'; the fixture 4 is fixed on the working table surface of the dividing disc 3, the axis of the fixture 4 is ensured to be coincident with the axis of the dividing disc 3 in the installation process, particularly the axis for installing the polygonal scanning mirror blank 5 is required to be coincident with the axis of the dividing disc 3, and the perpendicularity of the axis and the table surface is required to be ensured; the center hole of the polygonal scanning mirror blank 5 is fixed on the shaft of the clamp 4, in order to ensure the processing efficiency, the idea of overlapping and simultaneously processing a plurality of polygonal scanning mirror blanks 5 is adopted, and the polygonal scanning mirror blank 5 is pressed by a nut in the processing process, so that the polygonal scanning mirror blank 5 is prevented from shaking in the processing. The blades of the finely-adjustable fly cutter disc 6 can be finely adjusted in the axial direction and the radial direction of the cutter disc. Therefore, a specific tool tip height difference and a distance difference from the tool tip to the axis can be formed through the axial and radial fine adjustment, and further, the rough machining, the semi-finish machining and the finish machining of one surface of the polygonal scanning mirror can be realized through one-time tool adjustment and feeding; the adapter disc 7 is used for increasing the hanging length of the fly-cutting knife disc 6, so that the interference between the main shaft and the dividing disc 3 is avoided, and the adapter disc 7 is designed according to the configuration and the working space of the ultra-precision machine tool; the machine spindle 8 is used to provide the rotary main motion of the fly cutter disk 6 while cutting one side of the polygon scanning mirror relative to the axial motion along the index disk 3.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A method of machining a polygon scanning mirror, comprising the steps of:
step A, driving a polygon scanning mirror blank to perform angle indexing rotation through an indexing disc; the index plate and the polygonal scanning mirror blank are coaxially arranged on a machine tool workbench and linearly move along the Z axis of the machine tool, so that the fly-cutting knife plate axially feeds relative to the polygonal scanning mirror blank;
b, adjusting the axial and radial positions of the three cutter teeth on the fly cutter disc to enable the three cutter teeth to have height difference in the axial extending height of the cutter disc and the radial distances from the three cutter teeth to the center of the cutter disc to have distance difference so as to meet different cutting depth requirements of different cutter teeth and realize one-time feeding to finish the rough machining, semi-finish machining and finish machining processes of the current machining surface of the polygonal scanning mirror blank; in the machining process, the fly-cutting cutter disc is driven to rotate by the main shaft of the machine tool;
c, leveling one processing surface of the polygonal scanning mirror blank, and processing the leveled processing surface by one-step walking through a flying cutter disc; after the processing is finished, the index plate drives the polygon scanning mirror blank to rotate to the next processing surface for continuous processing, and the process is circulated until all the processing surfaces of the polygon scanning mirror blank are processed.
2. The machining method for the polygon scanning mirror as claimed in claim 1, wherein two or more polygon scanning mirror blanks are mounted on the index plate, and the two or more polygon scanning mirror blanks are arranged coaxially with the index plate.
3. The machining method for the polygon scanning mirror as claimed in claim 2, wherein two or more polygon scanning mirror blanks are fixed on the index plate by pressing with nuts.
4. The machining method for the polygon scanning mirror according to claim 1, wherein the rotation axis of the fly-cutter disc is perpendicular to the axis of the index disc.
5. A machining device for realizing the machining method for the polygon scanning mirror according to any one of claims 1 to 4, characterized by comprising a machine tool spindle (8), a fly-cutting cutter head (6), an index plate (3) and a bracket (2);
the output end of the machine tool spindle (8) is provided with a fly-cutting cutter head (6); the index plate (3) is arranged on a machine tool workbench (9) through a support (2), a clamp (4) is arranged at the output end of the index plate (3), and the clamp (4) is used for mounting a polygonal scanning mirror blank (5);
the fly-cutting cutter head (6) comprises a cutter head (65), three cutter bars (66) are arranged on the cutter head (65), all the cutter bars (66) are uniformly distributed on the end surface of the cutter head (65) along the circumferential direction to form a circular ring structure, and the fly-cutting cutter head also comprises a wedge-shaped block (67) and a plurality of gaskets with different thickness specifications;
an installation groove is formed in the outer wall of the cutter head (65) and is close to the end face, and a wedge-shaped block (67) is arranged on the inner wall of the bottom end of the installation groove in the axial direction of the cutter head (65); a gasket with a thickness specification is arranged on the inner wall of the bottom end of the mounting groove along the radial direction of the cutter head (65);
the bottom end face of the cutter bar (66) is an inclined plane, and the inclined plane at the bottom end of the cutter bar (66) is matched with the inclined plane of the wedge-shaped block (67); the top end of the cutter bar (66) is used for mounting the cutter teeth (62), and the inner side wall of the cutter bar (66) is in pressing contact with the gasket;
the inclined surfaces of the wedge-shaped block (67) and the cutter bar (66) are opposite in inclined direction and are in the radial direction of the cutter head (65); wedge (67) are through the regulating part effect, realize in the mounting groove along the radial reciprocating motion drive of blade disc (65), realize adjusting the height of cutter arbor (66) in the axial of blade disc (65).
6. A machining device according to claim 5, characterized in that the support (2) is mounted on the machine table (9) by means of an index plate shim (1) for adjusting the distance from the center of the index plate (3) to the axis of the spindle of the machine.
7. A processing device according to claim 5, characterized in that the adjusting member comprises a screw III (68), the wedge block (67) is fixed in the mounting groove by the screw III (68); one end of the screw III (68) is in threaded connection with the inner wall of the mounting groove after penetrating through the wedge-shaped block (67).
8. A machining device according to claim 5, characterized in that the tool holder (66) is held in the mounting groove by means of a screw II (64).
9. A processing device as claimed in claim 5, characterized in that the cutter head (65) is of cylindrical configuration; the outer circumference lateral wall of blade disc (65) is equipped with a plurality of regulation holes (69), and all regulation holes (69) are along blade disc (65) circumference evenly distributed, and regulation hole (69) are used for installing the counterweight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011014953.5A CN112157272A (en) | 2020-09-24 | 2020-09-24 | Machining method and device for polygon scanning mirror |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011014953.5A CN112157272A (en) | 2020-09-24 | 2020-09-24 | Machining method and device for polygon scanning mirror |
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| CN112157272A true CN112157272A (en) | 2021-01-01 |
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| CN202011014953.5A Pending CN112157272A (en) | 2020-09-24 | 2020-09-24 | Machining method and device for polygon scanning mirror |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857500A (en) * | 2021-10-25 | 2021-12-31 | 中国科学院光电技术研究所 | Multi-fly cutter cutting device |
| CN114055650A (en) * | 2021-11-26 | 2022-02-18 | 中国工程物理研究院机械制造工艺研究所 | Fly-cutting cutter disc and ultra-precise plane machining method |
| CN114749705A (en) * | 2022-03-25 | 2022-07-15 | 广东省天傲精工科技有限责任公司 | Prism surface processing technology and processing device |
-
2020
- 2020-09-24 CN CN202011014953.5A patent/CN112157272A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857500A (en) * | 2021-10-25 | 2021-12-31 | 中国科学院光电技术研究所 | Multi-fly cutter cutting device |
| CN114055650A (en) * | 2021-11-26 | 2022-02-18 | 中国工程物理研究院机械制造工艺研究所 | Fly-cutting cutter disc and ultra-precise plane machining method |
| CN114749705A (en) * | 2022-03-25 | 2022-07-15 | 广东省天傲精工科技有限责任公司 | Prism surface processing technology and processing device |
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