CN109397008B - Novel lens numerical control cutting machine and control method - Google Patents
Novel lens numerical control cutting machine and control method Download PDFInfo
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- CN109397008B CN109397008B CN201811468469.2A CN201811468469A CN109397008B CN 109397008 B CN109397008 B CN 109397008B CN 201811468469 A CN201811468469 A CN 201811468469A CN 109397008 B CN109397008 B CN 109397008B
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- 238000005520 cutting process Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 73
- 230000033001 locomotion Effects 0.000 claims abstract description 15
- 238000005498 polishing Methods 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 25
- 238000001179 sorption measurement Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000006872 improvement Effects 0.000 description 9
- 239000011229 interlayer Substances 0.000 description 6
- 238000003754 machining Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000013459 approach Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000012840 feeding operation Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Classifications
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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
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
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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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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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
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/04—Cutting or splitting in curves, especially for making spectacle lenses
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention provides a novel lens numerical control cutting machine and a control method. The cutting machine is used for cutting and polishing lenses to be cut and comprises a machine body, a clamping mechanism, a feeding mechanism, a cutting mechanism and a control mechanism. The clamping mechanism comprises a first moving driving device arranged on the machine body, and the first moving driving device is used for driving the clamp assembly to move in the Y-axis direction; the clamp assembly has a first rotational drive for driving the clamped lens in rotation. The cutting mechanism includes a second movement drive for driving the cutter assembly in the X-axis direction. The numerical control cutting machine uses the clamp assembly to move in the Y-axis direction to form a first axis, the first rotary driving device drives the clamped lens to rotate to form a second axis, the cutter assembly moves in the X-axis direction to form a third axis, and a simple and practical three-axis machine tool is formed.
Description
Technical Field
The invention relates to the technical field of lens cutting machines, in particular to a novel lens numerical control cutting machine and a control method.
Background
In recent years, eyeglass lenses with various shapes are mainly manufactured by adopting eyeglass processing equipment and technology of cutting instead of grinding, and in the processing mode, low-grade is mainly manufactured by using a traditional manual profiling machine and a single-spindle numerical control turning machine, so that the phenomena of poor general precision, low processing efficiency and the like are caused. The machining precision and efficiency of the lens can be improved by the middle-grade triaxial numerical control lens machining machine, but the machining precision and efficiency are large in occupied space, and the cutter needs to be switched, so that the working efficiency is low. The high-grade five-axis numerical control lens processing machine has high processing precision and high speed, but the five-axis numerical control lens processing machine has high manufacturing cost and low popularization and use rate in the spectacle processing industry.
Therefore, there is a need for a lens processing apparatus that can improve processing accuracy and processing efficiency, while reducing space costs.
Disclosure of Invention
The invention provides a novel lens numerical control cutting machine and a control method. The three-axis lens cutting machine aims at solving the problems of low machining precision and low machining efficiency of the existing three-axis lens cutting machine.
In order to solve the technical problems, the invention adopts the following technical measures:
a novel lens numerical control cutting machine is used for cutting and polishing a lens to be cut and comprises a machine body, a clamping mechanism, a feeding mechanism, a cutting mechanism and a control mechanism.
The clamping mechanism comprises a first moving driving device arranged on the machine body and a clamp assembly arranged on the first moving driving device, and the first moving driving device is used for driving the clamp assembly to move in the Y-axis direction; the clamp assembly is used for clamping the lens and is provided with a first rotary driving device for driving the clamped lens to rotate.
The feeding mechanism is arranged on the machine body and used for sequentially feeding the lens to be cut to the clamp assembly.
The cutting mechanism comprises a second movable driving device arranged on the machine body and a cutter assembly arranged on the second movable driving device, and the second movable driving device is used for driving the cutter assembly to move in the X-axis direction; the cutter assembly comprises a second rotary driving device, a cutter bar, a cutting cutter loaded at the tail end of the cutter bar and a grinding wheel sleeved on the cutter bar, and the second rotary driving device is used for driving the cutter bar to rotate.
The control mechanism is used for controlling the first movable driving device to drive the clamp assembly to move in the Y-axis direction, controlling the second movable driving device to drive the cutter assembly to move in the X-axis direction, controlling the first rotary driving device to drive the clamped lens to rotate and controlling the second rotary driving device to drive the cutter bar to rotate, so that the cutter assembly cuts or polishes the lens clamped by the clamping mechanism.
The invention can be further perfected by the following technical measures:
as a further improvement, the clamp assembly comprises a clamp body, a first rotary driving device, a telescopic device and a driven chuck.
The clamp body is provided with a driving chuck connected with the output end of the first rotary driving device, the driven chuck is rotatably arranged on the telescopic device, the telescopic device is used for controlling the driven chuck to be close to or far away from the driving chuck so as to clamp the lens, and the first rotary driving device drives the clamped lens to rotate through the driving chuck.
As a further improvement, the telescopic device comprises a telescopic cylinder and a fixed plate, wherein the telescopic cylinder is arranged on the clamp body and is positioned above the active clamp; the fixed plate is fixedly connected with the output end of the telescopic cylinder; the driven chuck is rotatably arranged on the fixed plate, and the telescopic cylinder is used for controlling the driven chuck to be close to or far away from the driving chuck so as to put down the lens.
As a further improvement, the lens numerical control cutting machine further comprises a storage mechanism, wherein the storage mechanism is arranged below the clamp assembly and comprises a storage box and a diversion slope, the included angle between the diversion slope and the horizontal plane is 30-60 degrees, and the diversion slope is used for receiving the lens put down from the clamp assembly and guiding the lens into the storage box.
As a further improvement, one end of the driven chuck, which is close to the driving chuck, is a concave arc surface which is concave towards the center, one end of the driving chuck, which is close to the driven chuck, is a convex arc surface which is convex towards the center, and the concave arc surface is matched with the arc surface in the middle of the lens.
As a further improvement, the cutter assembly further comprises a locking nut, the cutter bar is provided with a stepped shaft and an external thread, the stepped shaft is used for locking the grinding wheel, and the locking nut is in threaded connection with the external thread so as to be matched with the stepped shaft to lock the grinding wheel.
As a further improvement, the feeding mechanism comprises a feeding mechanical arm and a pushing device; the pushing device is used for stacking lenses to be cut and is positioned below the feeding manipulator; the feeding manipulator comprises a rotary driver, a telescopic arm and a negative pressure absorbing part; the telescopic arm is positioned at the rotating end of the rotating driver, and the negative pressure absorbing part is positioned at the telescopic end of the telescopic arm.
The control mechanism adsorbs the lens of piling up and placing on the blevile of push through pneumatic control negative pressure adsorption piece, and makes rotary driver with flexible arm cooperation will lens on the negative pressure adsorption piece moves to between the initiative chuck with the driven chuck to centre gripping lens.
As a further improvement, the pushing device comprises a protection net for limiting the vertical movement of the lens and a vertical driving device for pushing the lens to move up and down in the protection net.
The invention also provides a control method for controlling the lens numerical control cutting machine, which comprises the following steps:
s1: the vertical driving device pushes the lens to be cut to move upwards to an adsorbable area of the vacuum chuck.
S2, sucking the lens to be cut by the vacuum chuck, and driving the driven chuck to be far away from the driving chuck by the telescopic device.
And S3, the position of the telescopic end of the telescopic arm is adjusted, and the telescopic arm is driven to rotate by matching with the rotary cylinder, so that the lens to be cut moves between the driving chuck and the driven chuck and is abutted against the position of the driving chuck.
S4, the telescopic device drives the driven chuck to be close to the driving chuck so as to clamp the lens.
S5, the first rotary driving device drives the clamped lens to rotate; the second rotary driving device drives the cutter bar to rotate.
S6, the first movement driving device drives the clamp assembly to move towards the cutting mechanism in the Y-axis direction; the second moving driving device drives the cutter assembly to move towards the clamping mechanism in the X-axis direction.
S7, the second movable driving device drives the cutter assembly to move to the cutting position of the cutting cutter for the clamped lens, and the first movable driving device drives the clamped lens in rotation to move back and forth in the Y-axis direction so as to cut and process the lens profile.
S8, after the lens outline is cut, the first moving driving device drives the clamp assembly to move in the direction away from the cutting tool.
S9, the second movable driving device drives the cutter assembly to move to a grinding position of the grinding wheel on the clamped lens, and the first movable driving device drives the rotating clamped lens to reciprocate in the Y-axis direction so as to grind the machined lens profile.
S10, the telescopic device drives the driven chuck to be far away from the driving chuck, and the storage mechanism receives lenses falling from between the driving chuck and the driven chuck.
Further, defining a rotation period time of the clamped lens as N, and in step S7 and step S8, the time for the cutting tool to contact the rotating clamped lens is 1.4 to 1.7N.
Compared with the prior art, the invention has the following advantages:
1. the numerical control cutting machine uses the clamp assembly to move in the Y-axis direction to form a first axis, the first rotary driving device drives the clamped lens to rotate to form a second axis, the cutter assembly moves in the X-axis direction to form a third axis, and a simple and practical three-axis machine tool is formed.
2. The cutter assembly is characterized in that the grinding wheel and the cutting cutter are additionally arranged on the cutter bar, the cutter assembly is driven to do linear reciprocating motion through the second movable driving device, so that the cutting cutter cuts the lens, the grinding wheel polishes the cut lens, the cutter changing process is omitted, and the working efficiency is improved. And because the manipulator tool changing device is omitted, the space and the cost are saved.
3. Further, the feeding mechanism of the numerical control cutting machine comprises a feeding manipulator and a pushing device, wherein lenses to be cut are stacked and placed on the pushing device and are located below the feeding manipulator, so that the feeding manipulator can adsorb the lenses for many times through a telescopic arm, and the lenses are sent between the driving chuck and the driven chuck through being matched with a rotary driver, so that the lenses are clamped by a clamp assembly, and automatic feeding operation is completed.
Drawings
FIG. 1 is a schematic view of a first view of a cutter according to an embodiment of the present invention;
FIG. 2 is a schematic view of a second view of a cutter according to an embodiment of the present invention;
FIG. 3 is a schematic view of a portion of a device of a cutting machine according to an embodiment of the present invention;
FIG. 4 is a schematic view of a portion of the apparatus of the clamp assembly of FIG. 3;
FIG. 5 is a schematic view of the cutter assembly of FIG. 3;
FIG. 6 is a schematic view of the knife bar of FIG. 5;
FIG. 7 is a schematic structural view of the feeding mechanism in FIG. 3;
FIG. 8 is a schematic view of the pushing device of FIG. 7;
FIG. 9 is a schematic view of the telescopic arm and negative pressure suction member of FIG. 7;
FIG. 10 is a schematic view of the storage mechanism of FIG. 1;
fig. 11 is a schematic diagram of the structure of a lens to be cut and a finished lens to be cut.
Description of the main reference signs
Cutting the lens X1 to be cut and cutting the finished lens X2;
the machine body 1, a first vertical side plate 11, a second vertical side plate 12, a clamping mechanism 2, a first moving driving device 21, a first screw rod 22, a first screw rod seat 23, a first nut seat 24, a first directional shielding plate 25 and a first driving motor 26;
the clamp body 31, the driving chuck 32, the telescopic device 35, the telescopic cylinder 351, the fixed plate 352, the driven chuck 36 and the first rotary driving device 4;
the feeding mechanism 5, a feeding manipulator 51, a rotary driver 52, a telescopic arm 53, a negative pressure absorbing member 54, a telescopic rod 55, a fixed block 56, a driving seat 57,
The device comprises a pushing device 6, a protection net 61, a vertical driving device 62, a stepping motor 63, a positioning stabilizing rod 64, a vertical screw rod 65, a nut seat 66 and a lens tray 67;
a cutting mechanism 7, a second movement drive 71, a second directional shield 72;
the tool assembly 8, the cutting tool 81, the grinding wheel 82, the second rotary driving device 83, the tool bar 84, the stepped shaft 841, the external thread 842 and the locking nut 85;
a storage mechanism 9, a diversion slope 91 and a storage box 92.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The invention is described in further detail below with reference to the drawings and the detailed description.
Please refer to fig. 11, wherein X1 is the lens to be cut and X2 is the cut finished lens.
Referring to fig. 1, an embodiment of the present invention provides a lens cutting machine for cutting and polishing a lens to be cut, which includes a machine body 1, a clamping mechanism 2, a feeding mechanism 5, a cutting mechanism 7, a control mechanism (not shown), and a storage mechanism 9.
The machine body 1 is used for providing a fixed platform for other mechanisms of the cutting machine, so that a relatively fixed distance can be reserved among the clamping mechanism 2, the feeding mechanism 5, the cutting mechanism 7 and the like, and the mutual matching among the mechanisms is facilitated for processing.
Referring to fig. 1, 2, 3 and 4, the clamping mechanism 2 includes a first moving driving device 21 disposed on the machine body 1, and a clamp assembly (not shown) disposed on the first moving driving device 21.
The first moving driving device 21 is used for driving the clamp assembly to move in the Y-axis direction; the clamp assembly is used for clamping the lens and is provided with a first rotary driving device 4 for driving the clamped lens to rotate.
The feeding mechanism 5 is arranged on the machine body 1 and is used for sequentially feeding the lens to be cut to the clamp assembly, so that the lens to be cut is clamped by the clamp assembly, and automatic feeding is realized.
Referring to fig. 1, 2 and 5, the cutting mechanism 7 includes a second moving driving device 71 disposed on the machine body 1, and a cutter assembly 8 disposed on the second moving driving device 71. The second movement driving device 71 is used for driving the cutter assembly 8 to move in the X-axis direction.
The tool assembly 8 comprises a second rotary driving device 83, a tool bar 84, a cutting tool 81 loaded at the tail end of the tool bar 84 and a grinding wheel 82 sleeved on the tool bar 84, wherein the second rotary driving device 83 is used for driving the tool bar 84 to rotate. In actual production, as shown in fig. 5, most of the cutting tools 81 are loaded on the tool holder 84 by spring chucks, so that the cutting tools 81 work more stably, which is well known to those skilled in the art, and will not be described in detail herein.
The cutter assembly 8 is provided with the grinding wheel 82 and the cutting cutter 81 on the cutter bar 84, and the cutter assembly 8 is driven by the second moving driving device 71 to do linear reciprocating motion, so that the cutting cutter 81 cuts the lens, and the grinding wheel 82 polishes the cut lens, thereby omitting the cutter changing process and improving the working efficiency. And because the manipulator tool changing device is omitted, the space and the cost are saved.
The control mechanism is used for controlling the first moving driving device 21 to drive the clamp assembly to move in the Y-axis direction, controlling the second moving driving device 71 to drive the cutter assembly 8 to move in the X-axis direction, controlling the first rotating driving device 4 to drive the clamped lens to rotate, and controlling the second rotating driving device 83 to drive the cutter bar 84 to rotate. So that the lens held by the holding mechanism 2 is cut or polished by the cutter assembly 8 by the cooperation of the three shafts, with the Y-axis direction moving as a first axis, the X-axis direction moving as a second axis, and the lens rotation as a third axis.
The control mechanism is not shown in the figure, and is specifically embodied in that a processor is connected with an electric driver or an air driver in each mechanism through an electric signal, and the operation of each driver is controlled to realize the operation control of the cutting machine. The control mechanism can adopt a PLC control system, the PLC control system specifically controls each electric driver or each air driver, and as the installation of the control mechanism is known to a person skilled in the art, the numerical control system can also adopt the existing system for debugging, and the control mechanism is not specifically described here in cooperation with the technical scheme disclosed in the embodiment, so that the cutting machine can be realized and manufactured.
The numerical control cutting machine uses the clamp assembly to move in the Y-axis direction to form a first axis, the first rotary driving device 4 drives the clamped lens to rotate to form a second axis, the cutter assembly 8 moves in the X-axis direction to form a third axis, and a simple and practical three-axis machine tool is formed, the lens outline of the numerical control cutting machine can be cut and formed under the matched movement of the three axes, the grinding is convenient, and the machining precision is improved.
Referring to fig. 1, 2, 3 and 4, in the present embodiment, the clamp assembly includes a clamp body 31, a first rotary driving device 4, a telescopic device 35 and a driven chuck 36.
The clamp body 31 has a driving chuck 32 connected to the output end of the first rotary driving device 4, the driven chuck 36 is rotatably disposed on the telescopic device 35, the telescopic device 35 is used for controlling the driven chuck 36 to approach or depart from the driving chuck 32 so as to clamp the lens, and the first rotary driving device 4 drives the clamped lens to rotate through the driving chuck 32.
The clamp assembly clamps the lens by using the driving clamp head 32 and the driven clamp head 36 to be close to each other, and drives the clamped lens to rotate through the first rotary driving device 4, so that any peripheral part of the lens can be cut.
In this embodiment, the driving chuck 32 and the driven chuck 36 are made of nylon materials, so that friction is increased, and the driving chuck has high mechanical strength and high tensile strength and compression strength. In other embodiments, a polymeric material may be used.
Further, the telescopic device 35 includes a telescopic cylinder 351 and a fixing plate 352, the telescopic cylinder 351 is disposed on the clamp body 31 and is located above the driving chuck 32; the fixed plate 352 is fixedly connected with the output end of the telescopic cylinder 351; the driven chuck 36 is rotatably disposed on the fixed plate 352, and the telescopic cylinder 351 is used for controlling the driven chuck 36 to approach to clamp the lens or to separate from the driving chuck 32 to put down the lens.
Referring to fig. 1 and 10, corresponding to the fixture assembly, the storage mechanism 9 is disposed below the fixture assembly, and the storage mechanism 9 includes a storage box 92 and a guiding slope 91, an included angle between the guiding slope 91 and a horizontal plane is preferably 30-60 degrees, when the lens is cut, the telescopic cylinder 351 stretches, the driven chuck 36 is far away from the driving chuck 32, so that the lens falls, the lens falls down to the guiding slope 91 of the storage mechanism 9, and then slides into the storage box 92, and the lens falls into the storage box through the guiding slope 91 for stacking due to lighter mass of the lens.
Wherein the diversion ramp 91 is made of elastic material, so as to prevent the lens from being broken by collision, such as plastic or rubber with smoother surface. In this embodiment, the guide slope 91 is made of hard paper, so as to prevent the lens from being broken, reduce friction, and accelerate the guide flow into the storage box 92.
The angle between the diversion slope 91 and the horizontal plane is more preferably 30-45 degrees, and in this embodiment, the angle between the diversion slope 91 and the horizontal plane is more preferably 45 degrees. The guide slope 91 with an angle of 45 degrees can increase the storage depth of the storage box 92, improve the guide speed, and have enough bearing surfaces to bear lenses falling from between the two chucks.
Preferably, referring to fig. 5 and 6, the cutter assembly 8 further includes a locking nut 85, the cutter bar 84 has a stepped shaft 841 for locking the grinding wheel 82 and an external thread 842, and the locking nut 85 is screwed with the external thread 842 to cooperatively lock the grinding wheel 82 with the stepped shaft 841. Therefore, when the grinding wheel 82 is used, the grinding wheel 82 does not need to fall off, and the use precision is improved.
Referring to fig. 1 and 2, the machine body 1 has a first vertical side plate 11 extending along the Y-axis direction, and a second vertical side plate 12 extending along the X-axis direction, and the first vertical side plate 11 is fixedly connected with the second vertical side plate 12.
The first moving driving device 21 and the first rotating driving device 4 are both arranged outside the first vertical side plate 11, wherein the first moving driving device 21 is fixedly arranged outside the first vertical side plate 11.
The clamp body 31, the telescopic device 35 and the driven chuck 36 are all located inside the first vertical side plate 11, i.e. inside the machine body 1. The first vertical side plate 11 is provided with a first through groove (not labeled in the figure, see a first directional shielding plate), and the first through groove can be provided with a first movement driving device 21 for driving the clamp assembly to move in the Y-axis direction; and the first through groove can be used for the first rotary driving device 4 to move along with the clamp assembly in the Y-axis direction.
The second moving driving device 71 is disposed outside the second vertical side plate 12, and the cutter assembly 8 is located inside the second vertical side plate 12. The second vertical side plate 12 has a second through slot corresponding to the first through slot, and the second through slot is used for the second moving driving device 71 to drive the cutter assembly 8 to move in the X-axis direction.
Through setting up each device outside the inside and outside of organism 1 respectively, reach the effect of rational utilization space, reduction area.
Specifically, referring to fig. 1 to 3, the first moving driving device 21 includes a first driving motor 26, a first screw 22, two first screw seats 23, and a first nut seat 24.
The two first screw rod seats 23 are disposed at two ends of the first screw rod 22 and fixedly disposed on the first vertical side plate 11, and the first nut seat 24 is disposed on the first screw rod 22. The first driving motor 26 adopts a servo motor, the screw rod and the nut seat 66 adopt ball nut assemblies, so that the precision control of the clamp assembly of the first moving driving device 21 is ensured, and the three-axis fit precisely cuts the outline of the finished lens.
The first nut seat 24 has a first directional shielding plate, and is used for shielding the first through groove, isolating the inner side and the outer side of the first vertical side plate 11, protecting the inside of the cutting machine from chips, and damaging a transmission system and a control system besides the necessary directional effect of the nut seat 66. The first directional shield may be disposed against the inside or outside of the first vertical side plate 11. As shown in the figure, the first rotary driving device 4 is fixed to a first directional shielding plate, and the first directional shielding plate is provided with a through hole for the output end of the first rotary driving device 4 to extend into the inner side of the machine body 1 to be connected with the driving chuck 32.
In this embodiment, the first vertical side plate 11 has an interlayer, the first directional shielding plate is in the interlayer of the first vertical side plate 11, and the interlayer of the first vertical side plate 11 is used to limit the first nut seat 24 to move stably only, which is beneficial to improving the precision of the finished product.
The second moving driving device 71 includes a second driving motor, a second screw rod, two second screw rod seats and a second nut seat 66 corresponding to the first moving driving device 21; the two second screw rod seats are arranged at two ends of a second screw rod and fixedly arranged on the second vertical side plate 12, and the second nut seat 66 is arranged on the second screw rod; the second nut seat 66 includes a second directional shield 72.
The second vertical side plate 12 has an interlayer, a second directional shielding plate 72 is located in the interlayer and is movable in the interlayer of the second vertical side plate 12, and the second directional shielding plate 72 is used for shielding the second through slot.
The feeding mechanism 5 can be provided with different structures according to actual needs.
Please refer to fig. 1, 2, 7 and 8; in this embodiment, the feeding mechanism 5 includes a feeding manipulator 51 and a pushing device 6.
The pushing device 6 is used for stacking lenses to be cut and is positioned below the feeding manipulator 51; the feeding manipulator 51 comprises a rotary driver 52, a telescopic arm 53 and a negative pressure absorbing member 54; the telescopic arm 53 is located at the rotating end of the rotary driver 52, and the negative pressure suction member 54 is located at the telescopic end of the telescopic arm 53.
The control mechanism adsorbs the lenses stacked on the pushing device 6 by pneumatically controlling the negative pressure adsorption piece 54, and the rotary driver 52 and the telescopic arm 53 cooperate to move the lenses on the negative pressure adsorption piece 54 between the driving chuck 32 and the driven chuck 36, thereby clamping the lenses.
The lens to be cut is stacked on the pushing device 6 and is also located below the feeding manipulator 51, so that the feeding manipulator 51 can adsorb lenses through the negative pressure adsorption piece 54, the telescopic arm 53 can increase the adsorbable area of the negative pressure adsorption piece 54, and under the static condition of the pushing device 6, the feeding manipulator 51 can adsorb multiple lenses, and the lenses are sent between the driving chuck 32 and the driven chuck 36 through being matched with the rotary driver 52, so that the lenses are clamped by the clamp assembly, and automatic feeding operation is completed.
Wherein preferably, the pushing device 6 comprises a protection net 61 for limiting the vertical movement of the lens and a vertical driving device 62 for pushing the lens to move up and down in the protection net 61. Due to the protection of the protection net 61, the lenses cannot fall out, and the vertical driving device 62 can push the lenses to move up and down in the protection net 61, so that a plurality of lenses can be stacked on the protection net 61 at one time, and the lenses can be automatically fed.
The configuration of the vertical drive 62 may be set according to particular needs.
In this embodiment, the vertical driving device 62 includes a stepping motor 63, a positioning stabilizing rod 64, a vertical screw rod, a nut seat 66, and a lens tray 67, wherein the nut seat 66 is slidably sleeved on the positioning stabilizing rod 64 and is in threaded engagement with the vertical screw rod, one end of the lens tray 67 is fixedly arranged on the nut seat 66, and the other end extends into the protective net 61 to hold up the lens; the stepper motor 63 is used to drive the vertical screw to rotate to move the lens tray 67 up and down. The screw rod nut component is utilized to enable the screw rod nut component to be more convenient to control, and the precision is higher.
The telescopic end of the telescopic arm 53 is provided with a fixed block 56, the negative pressure absorbing member 54 comprises two vacuum chucks which are arranged on the side wall of the fixed block 56 at intervals, and the absorption direction of the vacuum chucks is consistent with the telescopic direction of the telescopic arm 53, so that when the driven chuck 36 approaches the driving chuck 32 to clamp lenses, the two vacuum chucks are positioned on two sides of the driven chuck 36.
As a further improvement, the telescopic arm 53 includes a driving seat 57, two telescopic rods 55 and a fixed block 56, where the driving seat 57 is located at a rotating end of the rotary driver 52 and is used for controlling the telescopic rods 55 to make a linear motion, and the fixed block 56 is located at an end of the telescopic rods 55;
the two telescopic rods 55 are spaced apart and arranged in parallel on the driving seat 57, so that the fixed plate 352 and the driven chuck 36 are located between the two telescopic rods 55 when the rotary driver 52 drives the telescopic rods 55 to rotate toward the driving chuck 32.
The feeding manipulator 51 comprises a rotary driver 52, a telescopic arm 53 and a negative pressure absorbing part 54 which are pneumatically controlled, namely a rotary cylinder or a pneumatic telescopic device 35, and are connected by a very thin air pipe, so that the operation of the feeding manipulator is not disturbed.
Referring to fig. 7 and 9, the telescopic end of the telescopic arm 53 has a fixed block 56, and the negative pressure suction member 54 includes two vacuum chucks disposed at intervals on the side wall of the fixed block 56, so that when the driven chuck 36 approaches the driving chuck 32 to clamp the lens, the two vacuum chucks are located on both sides of the driven chuck 36. It should be noted that the diameters of the driving chuck 32 and the driven chuck 36 are only one-fourth to one-half of the diameter of the lens to be cut, so that the vacuum chuck can be attached to the lens without interfering with the clamping of the lens by the driving chuck 32 and the driven chuck 36.
The suction direction of the vacuum chuck is consistent with the telescopic direction of the telescopic arm 53, so that when the telescopic arm 53 and the fixed plate 352 rotate to be vertical, the lens to be cut is just sent between the two chucks.
The telescopic arm 53 includes a driving seat 57, two telescopic rods 55, and a fixing block 56, where the driving seat 57 is located at a rotating end of the rotary driver 52 and is used for controlling the telescopic rods 55 to perform linear motion, and the fixing block 56 is located at an end of the telescopic rods 55.
The two telescopic rods 55 are spaced apart and arranged in parallel on the driving seat 57, so that when the rotary driver 52 drives the telescopic rods 55 to rotate towards the driving chuck 32, the fixed plate 352 and the driven chuck 36 are located between the two telescopic rods 55, i.e. the telescopic rods 55 and the fixed plate 352 do not interfere with each other in space. The fixing plate 352 and the two vacuum chucks are formed in a U shape, so that the fixing plate 352 is prevented from interfering the driven chuck 36 and the driving chuck 32 to clamp the lens.
Further, an end of the driven chuck 36, which is close to the driving chuck 32, is a concave arc surface recessed toward the center, an end of the driving chuck 32, which is close to the driven chuck 36, is a convex arc surface protruding toward the center, and the concave arc surface is adapted to the arc surface of the middle of the lens. The chuck shape of looks adaptation is favorable to the fixed of lens to and prevent that the lens from breaking, and with middle part cambered surface looks adaptation can play the effect of lens calibration. In addition, the lens calibration can also rely on the protection net 61 to limit the position of the lens in the vertical direction, and the lens is adsorbed at a fixed position by driving the negative pressure adsorption piece 54 by the manipulator, so that the center of the lens is controlled to be positioned on the clamping head.
The embodiment also provides a control method of the cutting machine, which comprises the following steps:
s1: when the lens X1 to be cut is installed in the protection net, the vertical driving device pushes the lens X1 to be cut to move upwards to an adsorbable area of the vacuum chuck, and the adsorbable area comprises an area where the manipulator controls the rotary cylinder and the telescopic arm to be matched and can be adsorbed.
S2, sucking the lens to be cut by the vacuum chuck, and driving the driven chuck to be far away from the driving chuck by the telescopic device.
And S3, adjusting the position of the telescopic end by the telescopic arm, and driving the telescopic arm to rotate by matching with the rotary cylinder so as to enable the lens to be cut to move between the driving chuck and the driven chuck and to be attached to the position of the driving chuck.
S4, the telescopic device drives the driven chuck to be close to the driving chuck so as to clamp the lens.
S5, the first rotary driving device drives the clamped lens to rotate; the second rotary driving device drives the cutter bar to rotate.
S6, the first moving driving device drives the clamp assembly to move towards the cutting mechanism in the Y-axis direction, and the second moving driving device drives the cutter assembly to move towards the clamping mechanism in the X-axis direction, so that the cutter assemblies are mutually close to a certain distance for preparing cutting.
S7, the second movable driving device drives the cutter assembly to move to the cutting position so as to facilitate the cutting of the clamped lens by the cutting cutter.
The first moving driving device drives the clamped lens in rotation to move towards the cutting tool to finish feeding, the first moving driving device drives the lens to move in the Y-axis direction and rotate in cooperation with the lens, and the three shafts perform interpolation under the control of the control mechanism, so that the contour of the lens is cut and machined.
And S8, after the lens contour is cut, the first moving driving device drives the clamp assembly to move towards the direction away from the cutting tool, so that tool withdrawal is completed.
S9, the second movable driving device drives the cutter assembly to move to a grinding position of the grinding wheel on the clamped lens, and the first movable driving device drives the rotating clamped lens to reciprocate in the Y-axis direction so as to grind the machined lens profile.
S10, the telescopic device drives the driven chuck to be far away from the driving chuck, and the storage mechanism receives the lens X2 falling from between the driving chuck and the driven chuck.
Further, defining a rotation period time of the clamped lens as N, and in step S7 and step S8, the time for the cutting tool to contact the rotating clamped lens is 1.4 to 1.7N. Therefore, the cutting opening of the cutting tool during feeding and retracting the lens is utilized, the leftover materials of the lens are cut into at least two parts, the leftover materials fall off conveniently, grinding wheels are facilitated to polish the cut lens, and the interference of the leftover materials is avoided.
In other embodiments, the time between the feed and withdrawal of the cutting tool may also be 2.4 to 2.7N, or 3.4 to 3.7N.
Furthermore, the high-pressure fan can be adopted to match and take out the leftover materials.
In order to grind the lens profile more accurately while simultaneously compromising the efficiency of operation, the preferred range of rotational speeds for the clamped lens is 40 to 60 rpm.
In this embodiment, the rotation speed of the clamped lens is 50 rpm, so that the moving speed of the clamp can be lower than 30 m/min, and the precision control is convenient.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Claims (6)
1. The novel lens numerical control cutting machine is used for cutting and polishing a lens to be cut and is characterized by comprising a machine body and a clamping mechanism, wherein the clamping mechanism comprises a first movable driving device arranged on the machine body and a clamp assembly arranged on the first movable driving device, and the first movable driving device is used for driving the clamp assembly to move in the Y-axis direction;
the clamp assembly is used for clamping the lens and is provided with a first rotary driving device for driving the clamped lens to rotate;
the feeding mechanism is arranged on the machine body and is used for feeding the lenses to be cut to the clamp assembly in sequence;
the cutting mechanism comprises a second movable driving device arranged on the machine body and a cutter assembly arranged on the second movable driving device, and the second movable driving device is used for driving the cutter assembly to move in the X-axis direction; the cutter assembly comprises a second rotary driving device, a cutter bar, a cutting cutter loaded at the tail end of the cutter bar and a grinding wheel sleeved on the cutter bar, and the second rotary driving device is used for driving the cutter bar to rotate;
the control mechanism is used for controlling the first movable driving device to drive the clamp assembly to move in the Y-axis direction, controlling the second movable driving device to drive the cutter assembly to move in the X-axis direction, controlling the first rotary driving device to drive the clamped lens to rotate and controlling the second rotary driving device to drive the cutter bar to rotate so as to enable the cutter assembly to cut or polish the lens clamped by the clamping mechanism;
the clamp assembly comprises a clamp body, a first rotary driving device, a telescopic device and a driven chuck;
the clamp body is provided with a driving chuck which is connected with the output end of the first rotary driving device, the driven chuck is rotatably arranged on the telescopic device, the telescopic device is used for controlling the driven chuck to be close to or far away from the driving chuck so as to clamp the lens, and the first rotary driving device drives the clamped lens to rotate through the driving chuck;
the telescopic device comprises a telescopic cylinder and a fixed plate, and the telescopic cylinder is arranged on the clamp body and is positioned above the active clamp; the fixed plate is fixedly connected with the output end of the telescopic cylinder; the driven chuck is rotatably arranged on the fixed plate, and the telescopic cylinder is used for controlling the driven chuck to be close to or far away from the driving chuck so as to put down the lens;
the feeding mechanism comprises a feeding mechanical arm and a pushing device; the pushing device is used for stacking lenses to be cut and is positioned below the feeding manipulator; the feeding manipulator comprises a rotary driver, a telescopic arm and a negative pressure absorbing part; the telescopic arm is positioned at the rotating end of the rotary driver, and the negative pressure absorbing part is positioned at the telescopic end of the telescopic arm;
the control mechanism adsorbs lenses stacked on the pushing device through a pneumatic control negative pressure adsorption piece, and the rotary driver is matched with the telescopic arm to move the lenses on the negative pressure adsorption piece between the driving chuck and the driven chuck so as to clamp the lenses;
the end of the driven chuck, which is close to the driving chuck, is a concave arc surface which is sunken towards the center, the end of the driving chuck, which is close to the driven chuck, is a convex arc surface which is protruded towards the center, and the concave arc surface is matched with the arc surface in the middle of the lens.
2. The numerical control lens cutting machine according to claim 1, further comprising a storage mechanism, wherein the storage mechanism is arranged below the fixture assembly, the storage mechanism comprises a storage box and a diversion slope, the included angle between the diversion slope and the horizontal plane is 30-60 degrees, and the diversion slope is used for receiving lenses put down from the fixture assembly and guiding the lenses into the storage box.
3. The numerical controlled lens cutting machine of claim 1 wherein the tool assembly further includes a locking nut, the tool bar having a stepped shaft and an external thread for locking a grinding wheel, the locking nut threadably engaging the external thread to matingly lock the grinding wheel with the stepped shaft.
4. The numerical controlled lens cutting machine of claim 1 wherein the pushing device includes a protective net for defining the vertical movement of the lens and a vertical driving device for pushing the lens up and down within the protective net.
5. A control method for controlling the numerical controlled lens cutting machine of claim 2, comprising:
s1: the vertical driving device pushes the lens to be cut to move upwards to an adsorbable area of the vacuum chuck;
s2, sucking a lens to be cut by a vacuum chuck, and driving a driven chuck to be far away from a driving chuck by a telescopic device;
s3, adjusting the position of the telescopic end of the telescopic arm, and driving the telescopic arm to rotate by matching with a rotary cylinder so as to enable the lens to be cut to move between the driving chuck and the driven chuck and to be abutted against the position of the driving chuck;
s4, the telescopic device drives the driven chuck to be close to the driving chuck so as to clamp the lens;
s5, the first rotary driving device drives the clamped lens to rotate; the second rotary driving device drives the cutter bar to rotate;
s6, the first movement driving device drives the clamp assembly to move towards the cutting mechanism in the Y-axis direction; the second movable driving device drives the cutter assembly to move towards the clamping mechanism in the X-axis direction;
s7, the second movable driving device drives the cutter assembly to move to the cutting position of the cutting cutter for cutting the clamped lens, and the first movable driving device drives the rotating clamped lens to reciprocate in the Y-axis direction so as to cut and process the lens profile;
s8, the first movement driving device drives the clamp assembly to move in a direction away from the cutting tool;
s9, the second movable driving device drives the cutter assembly to move to a grinding position of the grinding wheel on the clamped lens, and the first movable driving device drives the rotating clamped lens to reciprocate in the Y-axis direction so as to grind the machined lens profile;
s10, the telescopic device drives the driven chuck to be far away from the driving chuck, and the storage mechanism receives lenses falling from between the driving chuck and the driven chuck.
6. The control method according to claim 5, wherein a rotation period time of the clamped lens is defined as N, and a time for which the cutting tool is in contact with the rotating clamped lens in step S7 and step S8 is 1.4 to 1.7N.
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| CN201811468469.2A CN109397008B (en) | 2018-12-03 | 2018-12-03 | Novel lens numerical control cutting machine and control method |
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| CN111960657B (en) * | 2020-07-31 | 2023-07-04 | 中山市光维光电科技有限公司 | Lens special-shaped cutting machine |
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