JP2001170851A - Lens polishing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens polishing system that shortens a correcting time, eliminates correction failure, improves production yield, records automatically correction and forms a LAN remote controllable. SOLUTION: This system comprises a lens receiving dish 2 adapted to place a lens 1 thereon, a rotating function 3 for the lens receiving dish 2, a grinding wheel 4, an arm part 8 adapted to hold a long stick holder 7 capable of engaging with and pivoting on center of the grinding wheel 4, and a spindle 9 vertical- rotatably at the base of the arm part 8. The system has a vertically reciprocating mechanism 10 capable of pressing the grinding wheel 4 to grind the lens 1, a driving part 6a for variably positioning the grinding wheel 4 via a horizontally reciprocating mechanism 6, an origin detecting part 6b for detecting the position of the origin of the horizontally reciprocating mechanism 6, a controlling part 11-1 for controlling rotation of the driving part 6a, an operating part 12, one or more sets of equipment 14-1 having the above components as one set and the likes 14-2-14-n and one or more computers 13-1-13-n connected to the controlling parts 11-1-11-n via communication cables.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a lens polishing system for an optical lens.

[0002]

2. Description of the Related Art First, the prior art will be described below with reference to FIGS.

FIG. 5A is an explanatory side view of the entire conventional apparatus in which only parts such as a lens, a grindstone and a lens tray are schematically enlarged.

In the figure, a lens 1 is a lens pan 2
The driving unit (motor) 3a that constitutes the rotation mechanism 3 includes the pulleys 3b and 3c and the belt 3d.
Is rotated at a constant speed about the lens axis via Note that the lens 1 is mounted on the lens tray 2 such that the lens axis coincides with the rotation axis of the lens tray 2.

A grindstone 4 is placed on the lens 1, and a predetermined position of the grindstone 4 is held by an elongated rod-like holding member 7 (hereinafter, referred to as “kanzashi”) having a sharp tip, commonly called “kanzashi”. It has become.

At the center of the upper surface of the grindstone 4, a conical recess having a diameter larger than the diameter of the tip of the hairpin is bored, and the sharp tip of the hairpin is placed in contact with the cone from above.

The hairpin is gripped by the arm 8, and the arm 8
Is provided with a support shaft 9 at the base so as to be vertically rotatable.
Is connected to a horizontal reciprocating body 5 forming a slider. The arm 8 has a support shaft 9 as a fulcrum.
A vertical reciprocating mechanism 10 formed of a fluid cylinder, such as an air cylinder or a hydraulic cylinder, which suspends the arm portion 8 so as to be rotatable in the vertical direction, is disposed so as to press the polished surface of the lens 1. The lens 1 is polished freely while appropriately pressing the lens 1 via the grindstone 4.

With the above-described configuration, as shown in FIGS. 3 and 4, in the lens polishing step, the hairpin 7 and the grindstone 4 swing within the swing width Ws in the front-rear direction in accordance with the movement of the slider. The contact angle θ of the grindstone 4 follows the curved surface of the lens 1.

The components described above are the same reference numerals in the lens polishing system according to the present invention and the conventional apparatus (see FIGS. 1 and 5A and 5B). Of the conventional apparatus will be described.

The slider 5 is connected to an edge of a rotating disk 23 having a radius r by a link 24. This rotating disk 23
The motor 22 rotates at a constant speed via pulleys 22a and 22b and a belt 22c. This rotating disk 23
As shown in FIG. 7, the position of the slider 5 reciprocates between P1, P2, and P3 in a sinusoidal manner. Hereinafter, such a movement mode of the slider 5 will be referred to as “swing”. In FIG. 5B, the position of the slider 5 is P at the point where the disk angle of the rotating disk 23 is 0 °.
1, P2 at π / 2, P3 at π, P2 at 3π / 2, and P2 is the midpoint between P1 and P3.

In the relationship between the rotating disk 23 and the slider 5 as described above, when the slider 5 moves between P1 and P3, the grindstone 4 also follows and swings through the wrench 7 to perform a polishing operation. If the grindstone 4 is deviated from the center of the lens 1 when the position of P5 is P2, the lens 1 is in an unevenly polished state, which causes an inconvenience.

Therefore, as a preparation work before the polishing operation, the position of the rotating disk 23 is fixed at 90 ° (π / 2) by a jig, a level is placed on the grindstone 4, and a table position adjusting screw is used. The position of the movable table 21 is adjusted, and the whetstone 4 is leveled out.

When the lens is polished many times, the grindstone 4 also wears out, and as shown in FIG. 3, the height of the grindstone 4 decreases from TH1 to TH2. Cannot be maintained horizontally, and processing defects due to uneven polishing occur.

Therefore, it is necessary to correct the position of the grindstone at a level of several tens of microns after polishing a certain number before the processing accuracy exceeds the allowable range. In this correction operation, the grindstone 4 must be leveled out using the table position adjusting screw each time.

According to another finding, the position is controlled by a driving operation of a motor or the like, and the swing width and the correction amount of the pin position after polishing for a certain number of times (this correction amount depends on the post-polishing dimensions of the lens). (Determined by comparing reference dimensions) for each lens type.

[0016]

However, in the above-mentioned conventional example, since the correction work is performed by the inching operation by the user, it takes time and effort, and since a correction amount is added to the current position, a mistake is likely to occur. Yield also decreases.
In order to know the operation status of polishing, such as the number of products, it is necessary to go to the production site and check. Since the memory of the correction status is manually input, there is a problem that it is uncertain and may cause a mistake.

The present invention has been made in view of the above-mentioned circumstances, and shortens correction time, eliminates correction mistakes, improves production yield, automatically records correction contents, and enables remote control of a plurality of devices. It is an object of the present invention to provide a lens polishing system in which a LAN system is constructed.

[0018]

The present invention can solve the above-mentioned problems by providing the following constitution.

(1) A lens used in an optical system, a lens tray for mounting and fixing the lens, a rotation mechanism for the lens tray, a grindstone for polishing the lens, and a grindstone for moving the grindstone through a horizontal reciprocating body. Using a horizontal reciprocating mechanism, the lens surface can be polished freely and can be polished, and the conical concave portion can be held at the center of the grinding stone. An arm for fitting and pivotally supporting the tip end into a conical recess formed in the center of the grinding stone, and holding the elongated rod-shaped holding body, and a support shaft rotatable vertically at a base of the arm. And an up-down reciprocating mechanism capable of pressing a whetstone for polishing the lens through the elongated rod-shaped holder with the arm as a fulcrum using the arm as a fulcrum. A drive unit for variably positioning the position,
A control unit that controls the rotation amount of the drive unit, an operation unit that operates the control unit, and a device group of one or more sets each including one set, connected to the control unit by a communication cable, A lens polishing system comprising at least one or more computers.

(2) The horizontal reciprocating mechanism comprises a ball screw drive transmitting section including a male screw section and a female screw section forming a nut connected to a horizontal reciprocating body forming a slider, and a driving section such as a motor. The lens polishing system according to the above (1), wherein the lens polishing system comprises:

(3) The vertical reciprocating mechanism is an air cylinder,
The lens polishing system according to the above (1), comprising a fluid cylinder such as a hydraulic cylinder.

(4) In the lens polishing system according to the above item (1), the rotation amount command of the drive unit of the horizontal reciprocating mechanism can be remotely controlled by the computer via the communication cable. Characterized lens polishing system.

(5) In the lens polishing system according to the above (1), the computer can remotely judge whether the rotation of the drive section of the horizontal reciprocating mechanism is correct or not via the communication cable. Lens polishing system.

(6) The lens polishing system according to the item (1), wherein the number of polished lenses can be remotely controlled by the computer via the communication cable.

(7) In the lens polishing system according to the above item (1), a starting lock for starting the polishing of the control section can be remotely controlled by the computer via the communication cable. Lens polishing system.

(8) In the lens polishing system according to the above item (1), the data on polishing by the control unit during polishing can be remotely managed by the computer via the communication cable. Lens polishing system.

(9) The lens polishing system according to the above (1), wherein the communication contents between the control unit and the computer via the communication cable can be automatically stored. Polishing system.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below.

FIG. 1 is an explanatory view of the entire configuration showing an example of a lens polishing system according to the present invention, FIG. 2 is a communication flowchart for correction, and FIG. 3 is a side view showing a mode of movement of a hairpin when a grindstone is worn. FIG. 4 is an explanatory side view showing the swing width of the hairpin and the following state of the grindstone on the lens surface.
(A) is a side view showing a configuration of a conventional polishing apparatus, (b)
FIG. 6 is an explanatory plan view showing a relationship between a rotating disk and a slider of the conventional device, FIG. 6 is a waveform explanatory diagram showing a movement mode of the slider in the polishing cycle according to the present invention, and FIG. FIG. 7 is an explanatory waveform diagram showing a movement mode.

The overall configuration will be described with reference to FIG. 1. In FIG. 1, portions having the same reference numerals as those in FIG.
The new part according to the present invention will be described.

The horizontal reciprocating mechanism 6 is a ball screw driving mechanism, and the horizontal reciprocating body 5 forming a male screw portion and a slider.
An origin detecting unit (origin sensor) configured to include a ball screw drive transmitting unit composed of a female screw unit forming a nut unit connected to the motor and a driving unit 6a such as a motor, and for detecting the origin position of the horizontal reciprocating mechanism 6. 6b, the horizontal reciprocating mechanism 6
A control unit 11-1 for controlling the amount of rotation of the drive unit 6a for variably positioning the position of the grinding wheel 4 via the control unit, and an operation unit 12 for operating the control unit 11-1. Device group 14-1 having more than the number of sets and 14-2 similar thereto
And a LAN system connected to the control unit 11-1 by a communication cable, comprising at least one or more computers 13-1 to 13-n.

The up-and-down reciprocating mechanism 10 is composed of, for example, a fluid cylinder such as an air cylinder or a hydraulic cylinder to press the grindstone 4 against the lens 1.

Further, for example, the device 14-1 can remotely control the rotation amount command of the drive unit 6a of the horizontal reciprocating mechanism 6 by the computers 13-1 to 13-n via the communication cable. Whether the rotation of the drive unit 6a of the horizontal reciprocating mechanism 6 is correct or not can be remotely determined by the computers 13-1 to 13-n via the communication cable.
Can be remotely controlled by the computers 13-1 to 13-n via the communication cable, and the starting lock of the polishing start of the control unit 11-1 is set to the computer 13-1 via the communication cable. -1 to 13-n can be remotely controlled, and the polishing data of the control unit 11-1 can be remotely managed by the computers 13-1 to 13-n via the communication cable. The contents of communication between the control unit 11-1 and the computers 13-1 to 13-n performed via a communication cable can be automatically stored.

It is needless to say that the computers 13-1 to 13-n can similarly deal with 14-2 to 14-n.

The LAN (Local (Local)) employed in the present invention will be described below.
The contents of the (Area Network) System will be described.

Lens polishing control units 11-1 to 11-n
(Hereinafter referred to as a slave unit) is a personal computer, a commercially available LAN
Insert and mount the board and install commercially available LAN communication software. The LAN communication software of the slave unit here is
This is a library of minimum basic software for transferring data to a designated address in byte units, for example (hereinafter referred to as a slave unit library).

A so-called host computer (hereinafter referred to as a master unit) for controlling the slave unit is also a personal computer, and a commercially available LAN
Insert and mount the board and install commercially available LAN communication software. The LAN communication software of the master unit here is
This is a library of minimum basic software for transferring data to a designated address in byte units, for example (hereinafter, referred to as a parent device library). An appropriate and unique address is set for each of the master unit and the slave unit.

The master unit has a table in which addresses of a plurality of slave units are described, and fetches address data according to the slave unit numbers. As an example, when there are three slave units, as shown in the following three lines, they are 128.145.51.1 128.145.51.2 128.1455.51.3, and the first from the top. These are the addresses of the child device, the second child device, and the third child device.

The master unit has a communication access command to the slave unit in an appropriate format.

An example will be described below.

3, COM = 50, DT1 = 20.345 The meaning of the above command means that data 20.345 is given by the command 50 to the third slave unit. That is, the address data of the third slave unit is extracted from the address table, and "COM = 5"
0, DT1 = 20.345 "is given to the master library, and" COM = "is sent to the third slave as communication data.
50, DT1 = 20.345 "arrives.

Next, the slave unit receives the LAN signal character data string from the master unit by executing the slave unit library,
Branch processing is appropriately performed according to the numerical value of the command, and is returned to the master unit. The return address is generally determined automatically by the slave library and returned to the transmission source, so no special setting is required.

The master unit has a plurality of appropriate commands, and the slave unit responds to this as appropriate.

Examples will be listed below.

COM = 10: Current position request command to slave unit Example: Transmission: 3, COM = 10 Reception: 20.300 COM = 20: Start / failure confirmation command to slave unit during activation Example: Transmission: 3, COM = 20 Reception: ACTIVE COM = 30: Command for confirming the production quantity to the slave unit Example: Transmission: 3, COM = 30 Reception: 321 COM = 40: Start prohibition command to the slave unit Example: Transmission : 3, COM = 40 Reception: LOCKED COM = 45: Command to release start prohibition to slave unit Example: Transmission: 3, COM = 45 Reception: RELEAS
ED COM = 50: Move command to slave unit Example: Transmission: 3, COM = 50, DT1 = 20.34
5 Reception: OK COM = 55: Move completion confirmation command to slave unit Example: Transmission: 3, COM = 55 Reception: FINISH
The procedure for driving the drive unit 6a forming the ED motor to actually perform the correction movement is as shown in the flowchart of FIG. 2, and the procedure will be described below.

Step S1: The parent device requests the child device for the current position via the LAN.

Step S2: The master requests the slave to confirm the production quantity via the LAN.

Step S3: The difference between the previous production quantity and the current production quantity is obtained, and a correction amount corresponding to this numerical value is calculated. The correction amount is, for example, table data corresponding to the numerical value.

Step S4: It is confirmed via the LAN that the slave unit is being started (= polishing), and during polishing, the process waits until polishing is completed.

Step S5: Prohibiting the start of the slave unit via the LAN. This is to avoid inadvertent activation when the correction operator and the polishing apparatus operator are not the same person.

Step S6: The child device is moved via the LAN. The correction amount obtained in step S3 is added to the current position obtained in step S1 and given to the slave unit. In the example of FIG. 2, the numerical value is 20.345.

Step S7: The completion of the movement of the slave unit via the LAN is confirmed. Continue the loop until the move is completed.

Step S8: Release the prohibition of activation of the slave unit via the LAN and permit the start of activation.

In the above-described process, necessary data such as the current position, the number of products to be produced, and the amount of correction are automatically stored.

With the above system (method), the drive unit such as a motor is remotely controlled and the control history is stored.

A comparison between the conventional device and the present invention for the mechanism for controlling the operation of the hairpinning operation shows that, in the case of the conventional device, the rotation of the motor 22 causes the position of the mechanism at the tip of the link 24 via the rotary disk 23 to rotate. The position control is difficult because the hairpin moves in a sine wave shape to polish the lens 1, but in the case of the present invention, since the horizontal reciprocating mechanism 6 including the ball screw driving mechanism is used, the motor 6a forms a slider. Since the sine wave control for moving the horizontal reciprocating moving body 5 linearly is performed, position management is reliable and easy.

[0057]

According to the present invention, the inching operation for correction takes about 30 seconds or more. However, in the present system, the moving time of the drive unit such as a motor is controlled by 3 seconds. Complete with: In addition, correction errors are eliminated, and the production yield is improved.

The operation status of polishing, such as the number of products, is
Is connected to the communication system, so that it can be immediately judged and controlled from a remote desk. Also, a plurality of master units and a plurality of slave units can cope with each other.

By storing the communication state, the recording of the correction status can be automated. And so on.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an entire configuration showing an example of a lens polishing system of the present invention.

FIG. 2 is a communication flowchart for correction.

FIG. 3 is an explanatory side view showing a movement mode of a hairpin when a grindstone is worn.

FIG. 4 is an explanatory side view showing a swing width of a hairpin and a following state of a grinding wheel on a lens surface.

5A is a side view showing a configuration of a conventional polishing apparatus, and FIG. 5B is an explanatory plan view showing a relationship between a rotating disk and a slider of the conventional apparatus.

FIG. 6 is a waveform explanatory diagram showing a movement mode of a slider in a polishing cycle according to the present invention.

FIG. 7 is a waveform explanatory diagram showing a movement mode of a slider with respect to a rotating disk in a conventional device.

[Explanation of symbols]

 Reference Signs List 1 lens 2 lens tray 3 rotating mechanism 3a driving unit (motor) 3b, 3c pulley 3d belt 4 grindstone 5 horizontal reciprocating body (slider) 6 horizontal reciprocating mechanism (ball screw driving mechanism) 6a driving unit (motor) 6b origin detecting unit (Origin sensor) 7 Elongated rod-shaped holder (commonly known as hairpin) 8 Arm 9 Support shaft 10 Vertical reciprocating mechanism 11-1 to n Control unit 12 Operation unit 13-1 to n Computer 14-1 to n Device group 21 Movable Table 22 Drive unit (motor) 22a, 22b Pulley 22c Belt 23 Rotating disk 24 Link 25 Base G Guide Ws Swing width

Claims (9)

[Claims] 1. A lens used for an optical system, a lens tray for mounting and fixing the lens, a rotation mechanism for the lens tray, a grindstone for polishing the lens, and a grindstone for moving the grindstone through a horizontal reciprocating body. Using a horizontal reciprocating mechanism, the tip of the elongated rod-shaped holding body having a sharp tip in the conical recess so as to be able to grind and follow the lens surface and to be able to hold the position of the grinding stone having a conical recess in the center. Is fitted and pivoted into a conical recess formed in the center of the whetstone, an arm for gripping the elongated rod-shaped holder, and a support shaft rotatably up and down at the base of the arm. A vertical reciprocating mechanism is provided so that a whetstone for polishing the lens can be pressed through the elongated rod-shaped holder with the arm portion as a fulcrum about the support shaft, and the position of the whetstone via the horizontal reciprocating mechanism is provided. A drive unit for variably positioning the motor, and a rotation amount of the drive unit. A control unit that controls the control unit, and an operation unit that operates the control unit;
At least one connected to the control unit by a communication cable;
A lens polishing system comprising the above computer. 2. A horizontal reciprocating mechanism includes a ball screw drive transmitting section including a male screw section and a female screw section forming a nut connected to a horizontal reciprocating body forming a slider, and a driving section such as a motor. 2. The apparatus according to claim 1, wherein
The lens polishing system as described. 3. The lens polishing system according to claim 1, wherein the up-and-down reciprocating mechanism comprises a fluid cylinder such as an air cylinder or a hydraulic cylinder. 4. The lens polishing system according to claim 1, wherein a rotation amount command of a driving unit of the horizontal reciprocating mechanism can be remotely controlled by the computer via the communication cable. Lens polishing system. 5. The lens polishing system according to claim 1, wherein the computer can remotely determine whether or not the rotation of the drive unit of the horizontal reciprocating mechanism is correct via the communication cable. Lens polishing system. 6. The lens polishing system according to claim 1, wherein the number of polished lenses can be remotely controlled by the computer via the communication cable. 7. The lens polishing system according to claim 1, wherein a starting lock for starting polishing of the control unit is remotely controllable by the computer via the communication cable. system. 8. The lens polishing system according to claim 1, wherein the computer is capable of remotely managing the data on whether or not the polishing is being performed by the control unit by the computer via the communication cable. system. 9. The lens polishing system according to claim 1, wherein the contents of communication between said control unit and said computer via said communication cable can be automatically stored. .