JPS60155350A - Automatic spherical surface grinding machine - Google Patents

Abstract

PURPOSE:To realize an automatic grinding machine for a wide variety of works with limited quantities while maintaining the operating accuracy by arranging a work head movable right and left and a wheel head rotatable horizontally and movable forward and backward to oppose to each other on a bed and by controlling the movement and angle of rotation of them. CONSTITUTION:When the start switch of an automatic shperical surface grinding machine 1 is depressed, a work spindle 6 and a work head 7 installed on a bed 2 move toward a wheel head 12 equipped with a wheel spindle 11 through actuators 3, 4, 5, and the work spindle 6 catching a work W rotates at a certain rotating speed. On the other hand, also the wheel spindle 11 attached with a grindstone rotates through an actuator 10 at a certain rotating speed, and further the wheel head 12 turns through actuators 8, 9 and approaches and performs the rough grinding-finish grinding-spark out of the work W by use of the grindstone in accordance with the concave or convex machining requirements; thus the machining to meet the set requirements can be finished. In this way, it is possible to automate the machining process for a wide variety of works with limited quantities maintaining the existing precision.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an automatic spherical surface grinding device, and more specifically, to a new automatic spherical surface grinding device for grinding the uneven surface of a lens based on commands from a control device. This invention relates to a spherical grinding device.

[Prior art]

Conventionally, spherical grinding devices for lenses used in optical instruments and the like have been required to have processing accuracy in the micron range, and productivity has been a major problem, especially in high-mix, low-volume production.

In other words, in the case of conventional spherical surface grinding equipment, there is a large amount of time lost in setup work to obtain the necessary spherical dimensions of the lens (workpiece) and trial cutting, and there is also a large amount of time lost in processing accuracy and production. There were problems such as the need for a considerable level of skill in order to improve one's abilities.

[Purpose of the invention]

This invention was devised by focusing on the conventional problems, and its purpose is to maintain the machining accuracy at least the same as before, and to significantly improve the productivity of high-mix, low-volume production. The present invention provides an automatic spherical grinding device.

[Structure of the invention]

In order to achieve the above object, the present invention provides a work head that is provided with a work spindle on the head that is movable in the left-right direction via an actuator, and that is rotatable in the horizontal direction with respect to the head via an actuator. A wheel head equipped with a wheel spindle movable in the front-rear direction is disposed to face each other, and a control device is provided for controlling the amount of movement between the work head and the wheel spindle via an actuator, and the control device includes at least one of the following: The horizontal movement adjustment amount of the work head and the boiler belly button I.
The turning angle and the amount of movement adjustment in the longitudinal direction are set, and the work head and the wheel head are operated via the respective actuators based on commands from the control device. It is.

In addition, in order to achieve the above object, there is provided a work head equipped with a work spindle on the vent 1 that is movable in the left and right direction via an actuator, and a work head that is rotatable in the horizontal direction with respect to the vent via an actuator, and Wheel heads each having a wheel spindle movable in the front-rear direction are disposed to face each other, and a locking device is provided for clamping a horizontal turning position and a moving position of the wheel head in the front-rear direction, respectively, and the lock A control device is provided which sends an operating signal to the device and controls the amount of movement between the work head 1- and the wheel spindle via an actuator. - the amount of adjustment of the turning angle and longitudinal movement of the wheel head, and the clamping position of the horizontal turning position and longitudinal movement position of the wheel head; The gist of the present invention is that the work head and the wheel head are operated, and the locking device is also operated.

[Embodiments of the invention]

The present invention will be described in detail below based on the accompanying drawings.

FIG. 1 shows an automatic spherical grinding device 1 implementing the present invention,
A front view of a control device 100 that controls the automatic spherical grinding device 1 is shown, and FIGS. 2 and 3 are side and plan views of the automatic spherical grinding device 1.

As shown in FIGS. 1 to 3, the automatic spherical grinding device 1 has a plurality of actuators 3, 4.5 on the vent 2.
A work head 7 equipped with a work spindle 6 that can be moved in the left and right direction via pulse motors 3, 4, and an air cylinder 5, and actuators 8, 9 relative to the bed 2.
10 (pulse motors 8, 9, and drive motors 10), a wheel equipped with a wheel spindle 11 that can be turned in the horizontal direction and can be moved in the front-rear direction is provided with a wheel 12 facing the wheel. .

Further, the control device 100 controls the amount of movement of the work head 7 and the wheel spindle 11 by controlling the amount of movement between the work head 7 and the wheel spindle 11.
, 8.9, and this control device 100
At least the amount of movement adjustment in the left and right direction of the work head 7, the turning angle of the rotor 12 to the wheel, and the amount of movement adjustment in the front and back direction are set.

The workpiece heel 1-7 is placed on the head frame 13 and the support frame 14 arranged on the head 2 as shown in FIGS. 4 to 6, and the support frame 14 is placed on the vent frame 13. It is constituted by a guide member 15 and is placed slidably along a dovetail groove-shaped slide surface 15a. A guide member 17 that is threadedly engaged with the pole screw 16 is attached to the lower center surface of the support frame 14.
The pole screw 16 is rotatably installed on the head frame 13 via a bearing member 18.

A gear 19 is attached to one end of the pole screw 16, and this gear 19 connects to the drive shaft 2 of the actuator 3 (pulse motor 3) attached to the side wall of the head frame 13.
It meshes with the gear 21 attached to the gear o.

Bearing members 22a and 22b are mounted on the support frame 14.
A drive shaft 23 is rotatably supported through the drive shaft 23, and a drive gear 24 is mounted at the center of the drive shaft 23. Further, a gear 25 is attached to one end of the drive shaft 23, and this gear 25 meshes with a gear 27 provided on a rotational drive shaft 26 of the actuator 4 (pulse motor 4) attached to the side wall of the support frame 14. It looks like this. Further, on the bearing portions 4t22a and 22b, a work spindle support bearing having a tapered sleeve 28 and a bearing member 29 is mounted on the member 3.
0a and 30b are arranged, and a hollow cylindrical work spindle 6 is placed on the work spindle support members 30a and 30b so as to be rotatable and slidable in the horizontal direction.

A gear 31 that can freely mesh with the gear 24 provided on the drive shaft 23 is fitted onto a portion of the outer peripheral surface of the work spindle 6 via a gear support portion 31a.

A collet chuck 32 for attaching the workpiece W (lens W) is detachably attached to the tip of the workpiece spindle 6, and a collet chuck 32 for opening and closing the workpiece spindle 6 is attached to the rear end of the workpiece spindle 6. An opening/closing cylinder 33 is attached. The opening/closing cylinder 33 is
A bushing rod 35 is attached to the tip of the piston 34, and this bushing rod 35 is connected to the work spindle 6.
It comes into contact with a bushing bar 36 inserted into the hollow interior of.

In addition, the tip of the bushing bar 36 is connected to the collet chuck 32.
It is arranged so that it comes into contact with the rear end of.

Note that 37 is a spring that always holds the bushing bar 36 in a fixed position.

Next, an actuator 5 (air cylinder 5) for moving the work spindle 6 to a predetermined position on the wheel head 12 is mounted on the work spindle support member 30b.

The upper end of a slide member 39 is attached to the tip of the piston rod 38 of the actuator 5. The slide member 39 is fitted onto the side of the gear 31 provided on the outer circumferential surface of the work spindle 6, and is connected to the actuator 5.
The work spindle 6 is moved forward and backward toward the wheel head 12 by the telescopic operation of the workpiece spindle 6.

Next, to the wheel equipped with the wheel spindle 11
2, as shown in FIGS. 7 to 10, a rotating frame 42 that rotates around a rotating shaft 41 is placed on the head 2, and the wheel head 12 is placed on this rotating frame 42. ing.

At the rear end of the wheel spindle 11 provided on the wheel head 12, a multistage pulley 43 is provided as shown in FIGS. 7 to 9. Also, the rotating frame 4
The above-mentioned actuator 10 (drive motor 10) is attached to the side wall portion of 2 through the housing 44, and the drive shaft 10a of this actuator 10 has a drive pulley 45 facing the multistage pulley 43. is provided. An endless bell 1-46 is connected to the drive boob IJ 45 and the pulley 43 and rotated to transmit the rotational driving force of the actuator 10 to the wheel spindle 11.

Next, in the rotating frame 42 and the boiler heel 1-12, four dovetail groove-shaped portions 48 formed at the lower part of the wheel head 12 can freely slide on a guide rail portion 47 formed at the upper end of the rotating frame 42. is mated to. And between the swing frame 42 and the wheel head 12,
As shown in FIG. 10, a sliding drive device 50 is provided.

The sliding drive device 50 includes a sliding actuator 9 (pulse smoke 9) mounted on the side wall of the rotating frame 42, and a pole connected to the output shaft 51 of the actuator 9 via gears 52 and 53. A guide portion +A55 attached to the lower part of the boiler heel 2 is slidably connected to the pole screw 54.

On the swing frame 42, as shown in FIG. 9, there are Mitswitches LSI and LS for regulating the sliding range of the wheel head 12 in the front and back direction (vertical direction in FIG. 3).
2 are provided, and the limit switches LSI and LS2 are provided with contact pieces 56a and 56 provided on the wheel head 12.
b are in contact with each other.

The above-described switch LSI and LS2 are electrically connected to the actuator 9 described above to start and stop the drive.

Further, a turning drive device 6o is provided between the wheel head 2 and the turning frame 42, which turns the wheel head 12 via the turning frame 42.

This swing drive device 60 includes a swing actuator 8 (pulse motor 8) mounted on a side wall of a swing frame 42, and a gear 62 connected to an output shaft 61 of the actuator 8.
．． 63, and a worm 65 provided in the middle of the rotary drive shaft 64. As shown in FIG. 7, the worm 65 is fitted onto the pivot shaft 41. The worm wheel 66 is configured to mesh with the worm wheel 66 .

The pivot shaft 41 is rotatably installed on the ben 1-2 via a bearing member 67, and the two wheels of the pivot shaft 41 include:
A disk-shaped head 68 press-fitted to the upper surface of the rotating frame 42
are integrated. At the lower end of the pivot shaft 41,
A locking device 69 is provided for fixing the pivot frame 42 onto the head 2.

As shown in FIG. 7, the lock device 69 has a lock cylinder 70 (air cylinder 70
) is attached, and a piston 71 attached to the lower end of the head 68 is slidably housed inside the lock cylinder 70.

The piston 7I defines an extension side pressure chamber 72a and a contraction side pressure chamber 72b, and a countersunk spring 73 is interposed inside the contraction side pressure chamber 72b.

Note that 74b is a supply/discharge port through which working pressure fluid (high pressure oil pressure) is supplied and discharged to and from the extension side pressure chamber 72a.

A locking device 75 is also provided between the wheel head 12 and the rotating frame 42 to fix the wheel y I-12 to the rotating frame 42.

This lock device 75 includes a lock member 76 that is pressed against the guide rail portion 47 of the rotating frame 42, and a lock cylinder 77 that operates this lock member 76 (
It consists of an air cylinder 77).

In the lock cylinder 78 (air cylinder 77), a piston 78 attached to one end of the lock member 76 is slidably housed inside the lock cylinder 77, as described above.

The piston 77 divides the inside of the lock cylinder 70 into an extension side pressure chamber 79a and a contraction side pressure chamber 79b, and a disc spring 80 is interposed inside the contraction side pressure chamber 79b to always bias it in the locking direction. ing.

In FIG. 1, 110 is a pulse motor driver of the control device 100, 120 is an operation panel, 130 is an air supply section, 140 is a central oil supply device, and 150 is a rehering block.

Further, the control device 100 has the following functions.

(a) Return-to-origin function: Returns each axis to its reference origin (starting position).

(b) Saved data recall function: Saved data can be recalled.

(C) Machining function: Grinding.

(d) Automatic correction function: If an error occurs as a result of grinding the workpiece, the error is input and automatically corrected.

(e) Idle feed amount measurement function: Measures the distance between the workpiece and the grindstone.

(f) 6 Manual correction function: Gives a correction amount to each axis based on the current position, making it independent? Do ili correction.

(g) Data storage function: Transfers the input work data (CRT display) to a predetermined location in the memory and saves it.

(h) Data table of contents display function: Displays saved data symbols (formation of processed workpieces) in a list.

(l) Data input and correction: Input and correct specification data.

(1), Spark out time (Cero grinding time).

(2), Feed rate and distance just before spark out (finishing machining).

(3), the feed rate and distance immediately before (2) above.

(rough machining).

In addition to the above-mentioned functions, this is done through an interactive system using a microcomputer and a display.

Next, the operation of the embodiment of the present invention having the configuration as described in section 2 will be explained based on the flowchart of FIG. 1I.

First, the control device 100 has the curvature of the workpiece (Tomihara),
The thickness of the processed workpiece), the inside of the diamond wheel
Set the outer diameter (fin), the length of the diamond wheel), and the length of the chuck w) (distance from the workpiece spindle end face to the workpiece mounting surface) (step 2).

Next, in step ■, it is determined whether the workpiece is to be machined on a convex or concave surface, and if it is machining on a convex surface, the answer is YES and step
Set the inner diameter of the delta ring in step (2), and in the case of concave machining, set the outer diameter of the delta ring in step (2).

Next, in step ■, grinding conditions (spark out time (
(sec), machining allowance for finishing and rough machining (crane), and depth of cut per second (fin) for each.

The above are the grinding conditions, and this data is displayed on the cathode ray tube. Furthermore, if the above conditions have already been stored from a previous process, they are recalled and the necessary portions are corrected.

Also, the grinding conditions in step ① above are the spark-out time (seconds).

Up to nine types of finishing and rough machining allowances (fins) and respective cutting amounts per second (dragons) can be stored as one condition.

Next, setup (positioning) is performed under the conditions described above. As a procedure for this positioning, first, as shown in step (2), each axis is returned to its origin (return to origin may be performed anywhere), and the origin is confirmed in step (2). If you have confirmed the origin, select YES and proceed to Step 7 ■
and positioning (setup) of the grinding wheel shaft (wheel spindle 11) in the cross direction, and if the origin is not confirmed, the answer is NO and returns to step (3), and the process continues until the origin is confirmed.

Next, in step (2), it is determined whether or not the setup has been completed, and if YES, the workpiece W is chucked onto the workpiece spindle 6 via the collet chuck in step [phase]. If the answer is No, the process returns to step (2) and continues until the setup is completed. Next, in step 0, the work W
It is determined whether or not the grinding is completed, and if YES, the start switch of the automatic spherical ωF cutting device 1 is pressed in step 0 to start machining the workpiece W. NO again
In this case, try chucking again in step @, return to step ■, and continue until chucking is completed.

When the start switch of the automatic spherical grinding device 1 is pressed, the work spindle 6 and work head 7 installed on the head 2 are moved to the wheel head 12 side equipped with the wheel spindle 11 via the actuator 3.4.5. As the workpiece spindle 6 moves, the workpiece spindle 6 that has chucked the workpiece W rotates at a constant U rotation speed. On the other hand, the wheel spindle 11 to which the grindstone is attached is also rotated at a constant rotation speed via the actuator 10, and further actuators 8 and 9.
The wheel head 12 rotates and approaches the grindstone, and the grindstone performs rough grinding, finish grinding, and spark-out on the workpiece W depending on whether the workpiece W is to be processed into a concave or convex surface, thereby completing the processing under the above conditions.

Next, when the machining of the workpiece W is completed, it is determined in step 0 whether the curvature of the workpiece W is within the allowable range, and if YES, the drive of the automatic spherical grinding device 1 is stopped in step [phase]. In the case of No, the error value is input in step [phase], and the process returns to step (3) and starts from the setup, and continues until the workpiece W falls within the allowable value.

Next, in step O, it is determined whether all the grinding work has been completed, and if YES, the work is finished, and if the next workpiece W is to be machined, it is NO and the step Return to step 1 and repeat the operations described above.

When processing the same workpiece W using the above-mentioned operating procedure, only the removal work is performed while leaving the data as is, and when the workpieces W have different shapes and sizes, The data is exchanged and inputted, and the grinding process is performed using the same operations as above.

[Results of invention]

The present invention provides a work head equipped with a work spindle that is movable in the horizontal direction via an actuator on top of the work head as described above, and the above-mentioned peso! - A wheel head equipped with a wheel spindle that can be turned in the horizontal direction via an actuator and movable in the front-rear direction is disposed to face the work head, and the amount of movement between the work head and the wheel spindle is controlled by the actuator. A control device is installed to control the work via the control device, and at least the horizontal movement adjustment amount of the workpiece heel 1- and the rotation angle and longitudinal movement adjustment amount of the wheel head are set in this control device. a work head configured to operate the work head and the wheel head via each of the actuators based on a command, and further comprising a work spindle on the head that is movable in the left and right direction via the actuator; A wheel head equipped with a wheel spindle which can be turned in the horizontal direction via an actuator and can be moved in the front and back direction is disposed to face the wheel head 71, and the horizontal turning position of the wheel head is arranged to face the wheel head. and,
A locking device is provided for clamping the movement position in the longitudinal direction, and a control device is provided for sending an activation signal to the locking device and controlling the amount of movement between the work head and the wheel spindle via an actuator. , at least the horizontal movement adjustment amount of the work head, the rotation angle and longitudinal movement adjustment amount of the wheel head, and the clamp position of the horizontal rotation position and longitudinal movement position of the wheel head are set, and this control is performed. Since the work head and wheel head are actuated via the respective actuators based on commands from the device, and the locking device is also actuated, the machining volume can be maintained at least the same as before, and moreover, it is possible to process a wide variety of products in small quantities. It has the effect of significantly improving production productivity.

Furthermore, since the operation is simple, anyone can perform the process, and products of the same quality and accuracy can be processed efficiently.

Furthermore, since the configuration is relatively simple, maintenance is also easy.

[Brief explanation of the drawing]

Fig. 1 is a front view of an automatic spherical grinding device and a control device implementing this invention, Fig. 2 is a side view of the automatic spherical grinding device, and Fig. 3 is a side view of the automatic spherical grinding device.
The figure is a plan view of the automatic spherical grinding device and the control device, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, FIG. Figure 6 is the vr-■ of Figure 1.
7 is a sectional view taken along the ■-■ arrows in FIG. 3, FIG. 8 is a side view taken along the ■-■ arrows in FIG. 3, and FIG. 9 is a cross-sectional view taken along the ■-■ arrows in FIG. 1. 10 is a sectional view taken along the line X--X in FIG. 1, and FIG. 11 is a flowchart 1- showing the operating procedure of the present invention. ■... Automatic spherical grinding device, 2... Head, 3, 4゜5.8.9.10... Actuator, 6... Work spindle, 7... Work \ throat, 11... -Wheel spindle, 12...Poil head, 69°75...Lock device, 100...Control device. Agent: Patent Attorney Makoto Ogawa − Patent Attorney No. 1” Ken Teru Patent Attorney Kazuhiko Saishita (23)

Claims (1)

[Scope of Claims] 1. A work head provided with a work spindle on a table that is movable in the left and right directions via an actuator, and a work head that is horizontally rotatable with respect to the head via an actuator, and A wheel head equipped with a wheel spindle movable in the front-rear direction is disposed facing each other, and a control device is provided to control the amount of movement of the wheel head and the wheel spindle to the workpiece via an actuator. , a small amount (with respect to the workpiece, set the amount of movement adjustment in the horizontal direction of An automatic spherical grinding device characterized in that it is configured to operate a work head and a wheel head via an actuator. 2. A work spindle is provided on the head and is movable in the front and rear and left and right directions via an actuator. A work head and a wheel head equipped with a wheel spindle that can be rotated in the horizontal direction with respect to the bed via an actuator and can be moved in the front-rear direction are arranged to face each other, and the horizontal direction of the wheel head is A locking device is provided for clamping the turning position and a moving position in the longitudinal direction, and a control device is provided for sending an activation signal to the locking device and controlling the amount of movement of the work head and the wheel spindle via an actuator, This control device is set with at least the horizontal movement adjustment amount of the work head, the rotation angle and longitudinal movement adjustment amount of the wheel head, and the clamp position of the horizontal rotation position and longitudinal movement position of the wheel head. Based on the command from this control device, the workpiece is moved via each of the actuators.]
- An automatic spherical grinding device characterized in that it is configured to operate a locking device as well as a wheel head.