JP2011224669A - Lens processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens processing device capable of making a machine size compact without any restrictions on a size or shape of a workpiece.SOLUTION: The lens processing device 1 includes a spindle 9 having at least one or more shafts, on each of which a grinding tool 8 such as a grind stone having a circular-arc grinding surface is detachably attached to a wheel head 7, a rotary adaptor 11a having a workpiece holder 10 for detachably fixing a lens material W on the same axis as that of the spindle 9, and a workpiece shaft base member 12 for holding a workpiece shaft 11. On the back sides of lens processing chambers 3a and 3b, a rotating/swinging drive device for rotating the workpiece shaft base member and simultaneously swinging it horizontally, and a vertical drive device for vertically moving the workpiece shaft base member are installed. The lens processing device 1 carries out curved surface processing with a prescribed curvature by applying a fixed pressing force while swinging, rotating and vertically moving the lens material W mounted on the workpiece holder 10 with respect to the grinding surface.

Description

  The present invention relates to a lens processing apparatus, and more specifically, a work for holding a lens material when a lens material of various sizes (diameter, thickness, etc.) is pressed by a grinding tool such as a grinding wheel to process a curved surface. The present invention relates to a lens processing apparatus that performs a turning motion, a swinging motion, and a vertical motion while pressing a holder against a grinding surface of a grinding tool with a constant pressing force (load).

  Conventionally, as a lens processing device, as a device that performs precision grinding and polishing using a grinding tool (diamond pellet, urethane pad, etc.) of a semi-arc-shaped grinding wheel as a lens, an Oscar type polishing machine or a ball center type Polishing machines are known.

  However, since some of the lens processing apparatuses as described above cannot be processed depending on the shape of the lens to be processed, a lens processing machine that can handle any lens has been proposed (for example, see Patent Document 1).

  By the way, the lens processing apparatus described above has a problem that the structure and movement are complicated because the combination of the linear guides causes the swinging movement and the turning movement, and the apparatus becomes large and expensive.

JP 2009-45686 A

  The present invention pays attention to such a conventional problem, and swings by combining linear motion and rotational motion while pressing the lens material mounted on the work holder against the grinding surface of a fixed grinding tool with a constant pressing force. , Since curved surface processing is performed while rotating and moving up and down, a lens processing device that can be easily processed without being limited by the size and shape of the lens material and that has a compact machine size is provided. It is intended.

  In order to achieve the above object, the present invention provides a work shaft including at least one spindle on which a grinding tool is detachably mounted on a wheel head, and a work holder on which a lens material is detachably mounted on the same axis as the spindle. A workpiece shaft base member that holds the workpiece shaft, a swing / swing drive device that swings the workpiece shaft base member and swings left and right and a vertical drive device that moves the workpiece shaft base member up and down. The gist is to perform curved surface processing by pressing the lens material mounted on the work holder with a constant load while swinging, turning, and moving up and down with respect to the grinding surface of the grinding tool. .

  Here, the swing / swing drive device rotates the swing shaft connected to the work shaft base member, and the swing drives the rotor connected to the swing shaft to rotate via the swing shaft. The vertical drive device includes a drive motor, and a swing shaft and a swing shaft are slidably engaged via a guide means on a base plate suspended in parallel with a work shaft, and is moved up and down above the base plate. A drive motor is installed, and a support member for the swing shaft and the swing shaft is screwed onto the rotational drive shaft of the lift drive motor, and swings with the swing shaft by forward or reverse rotational drive of the lift drive motor. The shaft is moved up and down along the guide means, and the lens material mounted on the work holder is ground via the work shaft base member and work holder. It is obtained by configured to move up and down with respect to the grinding surface.

  Furthermore, a suction means for sucking and holding the work W is connected to the work holder via a buffer member.

  The present invention includes at least one spindle having a grinding tool detachably mounted on the wheel head as described above, and a work shaft having a work holder that detachably mounts a lens material on the same axis as the spindle, A work shaft base member that holds the work shaft, a swing / swing drive device that swings the work shaft base member and swings left and right and a vertical drive device that moves the work shaft base member up and down, Since the lens material mounted on the work holder is pressed with a constant load while swinging, turning, and moving up and down with respect to the grinding surface of the grinding tool, the curved surface is processed. There is an effect that the machine size can be made compact without being restricted by the shape and the like.

It is a top view of the whole lens processing apparatus which implemented this invention. It is a front view of the lens processing apparatus of FIG. FIG. 3 is a left side view of FIG. 2. It is an AA arrow expanded sectional view of FIG. It is a partially expanded sectional view of the X section of FIG. It is explanatory drawing of a workpiece | work processing process, and is a front view of the set position of a workpiece | work. It is explanatory drawing of a workpiece | work processing process, and is explanatory drawing of the state which made the workpiece | work with which the workpiece holder was mounted | worn rotated a predetermined angle. It is explanatory drawing of a workpiece | work processing process, and is explanatory drawing of the state made to contact | abut, pressing a workpiece | work to the grinding surface of a grindstone with a predetermined load. It is explanatory drawing of a workpiece | work processing process, and is explanatory drawing of the state currently processed, rock | fluctuating, rotating, and moving up and down on the grinding surface of a grindstone. It is explanatory drawing of a workpiece | work processing process, and is explanatory drawing of the state currently processed, rocking | fluctuating, rotating, and moving up and down on the grinding surface of a grindstone similarly to FIG. It is explanatory drawing of a workpiece | work processing process, and is explanatory drawing of the process of lowering | hanging the workpiece | work which completed processing and moving it to a standby position. It is explanatory drawing of a workpiece | work processing process, and is explanatory drawing of the state which returned the work holder to the fixed position.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 is a plan view of the entire biaxial lens processing apparatus embodying the present invention, FIG. 2 is a front view of the entire lens processing apparatus of FIG. 1, FIG. 3 is a left side view of FIG. 2, and FIG. The lens processing device 1 includes hollow lens processing chambers 3a and 3b installed on a machine base 2 of the lens processing device 1, and the lens processing chambers 3a and 3b. Are provided with an operation panel 4 of the lens processing apparatus 1 and an opening / closing cylinder 6 for opening the doors 5a, 5b of the processing chambers 3a, 3b upward.

  As shown in FIGS. 4 and 5, in the lens processing chambers 3a and 3b, at least one spindle or more spindles on which a grinding tool 8 such as a grindstone having an arcuate grinding surface is detachably attached to the wheel head 7 are mounted. 9, a rotation adapter 11 a having a work holder 10 for detachably mounting a lens material W on the same axis as the spindle 9, a work shaft 11, and a work shaft base member 12 for holding the work shaft 11. Further, on the back side of the lens processing chambers 3a and 3b, a swing / swing drive device 13 that swings the work shaft base member 12 and swings left and right and simultaneously moves the work shaft base member 12 up and down. A driving device 14 is installed, and the lens processing device 1 according to the present invention applies the lens material W mounted on the work holder 10 to the grinding surface 8x of the grinding tool 8. Oscillating motion Te, pivoting movement, while the vertical movement is pressed by a constant pressing force and performs curved surface machining of a predetermined curvature.

  As shown in FIGS. 4 and 5, the turning / swinging drive device 13 has a tip end of a turning shaft 19a connected to the work shaft base member 12, and the turning shaft 19a is rotated on the rear end side of the turning shaft 19a. A turning shaft drive motor 15 such as a stepping motor to be driven is connected.

  Further, a rotor 17 is connected to the turning shaft 19a via a bearing member 16 such as a bearing case or a bearing so as to be able to turn. The swinging shaft is connected to the rotor 17 via a bearing member 18 such as a bearing case or a bearing. A swing shaft drive motor 20 such as a stepping motor that rotationally drives the swing shaft 19b is attached to the rear end side of 19b. Reference numerals 21A and 21B denote origin sensors of the work shaft base member 12 and the rotor 17, respectively.

  Further, as shown in FIG. 4, the vertical drive device 14 includes the swing shaft 19 a and the swing shaft on guide means 23 such as a rail laid in parallel on a base plate 22 suspended in parallel with the work shaft 11. 19b is slidably engaged, and an elevating drive motor 24 is installed above the base plate 22.

  Then, a support member 26 of the turning shaft 19a and the swinging shaft 19b is screwed onto a rotation drive shaft 25 (ball screw or the like) of the elevation drive motor 24 via a nut member or the like (not shown), and the elevation The rotation shaft 19a and the swing shaft 19b are moved up and down along the guide means 23 via the rotation drive shaft 25 and the support member 26 by the forward rotation or the reverse rotation drive of the drive motor 24, and the workpiece shaft base member 12 and the workpiece holder are moved. The lens material W mounted on the work holder 10 is moved up and down with respect to the grinding surface 8x of the grinding tool 8 via 10.

  As shown in FIG. 5, the work holder 10 that sucks and holds the lens material W via a cushioning member such as urethane is sucked by a suction device such as a vacuum device connected via a vacuum passage 29 formed in the work shaft 11. 30 is configured to be sucked and held.

  Next, a method of processing the lens W from a material such as glass having a diameter of 15 mm to 80 mm using the lens processing apparatus 1 as described above will be described with reference to FIGS.

〔Example〕
(A). Workpiece size: φ15 mm to φ80 mm glass plate (b). Whetstone size: 15 mm to 160 mm is selected according to the type of workpiece (c). Type of grinding stone: # 1500 diamond pellet or urethane pad (d). Processing time: (1 to 2 minutes)
(E): Work load on the grindstone: 0.5 kg to 12 kg, stepwise change

  First, processing condition data of the workpiece W to be processed is input to the operation panel 4 of the lens processing apparatus 1, and the workpiece holder 28 of the workpiece holder 10 is at the lower limit by the vertical drive device 14. As shown in FIG. 6, a lens material W having a predetermined size is sucked and held by a suction means 30 such as a vacuum device through a buffer member.

  From this state, as shown in FIG. 7, the turning / swinging drive device 13 is driven to move the work shaft base member 12 and the work holder 10 counterclockwise to a predetermined angle (0 degree to 0 depending on the size and radius of the work W). The lens material W mounted on the work holder 10 is tilted by a predetermined angle with respect to the grinding surface 8x of the grinding tool 8.

  Next, as shown in FIG. 8, the elevating drive motor 24 of the vertical drive device 14 is rotationally driven to rotationally drive the rotational drive shaft 25, and the revolving shaft 19a and the swinging shaft 19b are guided through the support member 26. The lens material W mounted on the work holder 10 is brought into contact with the grinding surface 8x of the grinding tool 8 with a predetermined pressure through the work shaft base member 12 and the work holder 10. .

  Then, as shown in FIGS. 9 and 10, the turning shaft drive motor 15 and the turning shaft drive motor 20 of the turning / swinging drive device 13 are driven to turn and turn the turning shaft 19a and the swinging shaft 19b. The rotary shaft 19a and the swinging shaft 19b are moved up and down by rotating the rotary drive shaft 25 by rotating the vertical drive motor 24 of the vertical drive device 14 and rotating the rotary shaft 19a. The workpiece W is machined while simultaneously controlling the three axes of the swing shaft 19b and the rotary drive shaft 25 for raising and lowering.

  Thus, the workpiece W in contact with the grinding surface 8x is rotated, oscillated, and moved up and down for a predetermined time (in this embodiment, it is about 1 to 2 minutes, but is arbitrarily set according to the type of workpiece) This is repeated until the target lens processing is completed.

  When the lens processing is completed, the turning shaft drive motor 15 and the turning shaft drive motor 20 of the turning / oscillation drive device 13 are stopped, and the elevation drive motor 24 of the vertical drive device 14 is rotated as shown in FIG. The rotary shaft 19a and the swing shaft 19b are moved down along the guide means 23 via the support member 26 by driving the rotary drive shaft 25 to rotate, and the workpiece W that has been processed is lowered to the original position. 12, the lens material W mounted on the tilted work holder 10 as shown in FIG. 12 is driven vertically by driving the swing shaft drive motor 15 and the swing shaft drive motor 20 of the swing / swing drive device 13, The first work W is mounted and removed, and the one-cycle machining is completed.

  The processing time, the swinging motion, and the vertical motion are continuously processed by inputting the data to the operation panel 4 of the lens processing apparatus 1 in advance corresponding to the size and shape of the workpiece W. Is possible.

  As described above, curved surface machining is performed by pressing the lens workpiece W mounted on the workpiece holder 10 with a constant load while swinging, rotating, and moving up and down the grinding surface 8x of the grinding tool 8. The lens material W can be processed without being limited by the size and shape of the lens material W.

  According to the present invention, it is possible to polish the raw material of glass or the raw material of resin material and perform lens polishing with high accuracy.

DESCRIPTION OF SYMBOLS 1 Lens processing apparatus 2 Machine base 3a, 3b Lens processing chamber 4 Operation panel 5a, 5b Door 6 Opening / closing cylinder 7 Wheel head 8 Grinding tool 8x Grinding surface 9 Spindle 10 Work holder 11 Work shaft 12 Work shaft base member 13 Turning and swinging Drive device 14 Vertical drive device 15 Swiveling shaft drive motor 16 Bearing member 17 Rotor 18 Bearing member 19a Swing shaft 19b Swing shaft 20 Swing shaft drive motor 21A, 21B Origin sensor 22 Base plate 23 Guide means 24 Lift drive motor 25 Rotation drive shaft (Ball screw etc.)
26 Support member 28 Work head 29 Vacuum passage 30 Adsorption means

Claims (4)

  At least one spindle with a grinding tool detachably attached to the wheel head, a work axis having a work holder for detachably attaching a lens material on the same axis as the spindle, and a work axis for holding the work axis A lens material mounted on the work holder, comprising a base member, a turning / swinging drive device for turning the work shaft base member and swinging left and right at the same time, and a vertical drive device for moving the work shaft base member up and down. Is a lens processing device that performs curved surface processing by pressing with a constant load while performing rocking motion, turning motion, and vertical motion on the grinding surface of the grinding tool.   A swing drive motor for rotating the swing shaft connected to the work shaft base member, and a swing drive motor for rotating the rotor connected to the swing shaft via the swing shaft; The lens processing apparatus of Claim 1 comprised by these.   The vertical drive device slidably engages a swing shaft and a swing shaft via a guide means on a base plate suspended in parallel with a work shaft, and a lift drive motor is installed above the base plate. A support member for the swing shaft and the swing shaft is screwed onto the rotational drive shaft of the lift drive motor, and the swing shaft and the swing shaft are moved along the guide means by the forward or reverse rotational drive of the lift drive motor. 3. The lens processing apparatus according to claim 1, wherein the lens processing apparatus is configured to move up and down, and to move the lens material mounted on the work holder through the work shaft base member and the work holder up and down with respect to the grinding surface of the grinding tool.   The lens processing apparatus according to claim 1, wherein a suction unit that sucks and holds a lens material is connected to the work holder via a buffer member.

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