JPH07178661A - Automatic buff polishing device - Google Patents

Abstract

PURPOSE:To provide a high efficient automatic buff polishing device wherein a shape, dimension and a material are multifarious and further buff polishing can be finished without dispersion in a workpiece of automobile wheel or the like in small quantity production. CONSTITUTION:A device os provided with a plurality of buff polishing machines provided along a working line to perform rough finish, intermediate finish, high finish, etc., and a workpiece holding pallet 61 conveyed to the successive buff polishing machine by a workpiece transfer conveyer by holding a workpiece 60 fixed. Buff polishing heads 14, 15, supported movably in parallel and vertical directions to an axial line of the spindle of the heads and further tiltably relating to the horizontal, are provided with respectively controlling servomotors and a control means for program-controlling action of the servomotor by a computer matched with a shape of the workpiece. The pallet 61 is lifted from on the workpiece conveyer in a prescribed buff polishing position, and the workpiece 60 is rotated around its center axial line, to perform uniform buff polishing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic buffing machine, and more particularly to an automatic buffing machine for buffing automobile wheels.

[0002]

2. Description of the Related Art Conventionally, buffing has been performed mainly for the purpose of improving the appearance of a metal or non-metal product by smoothing or mirror-finishing the surface of the product, and is provided on a buffing tool or a buffing head of a buffing machine. The disk-shaped buff thus prepared is rotated at a high speed, and a rod-shaped buff abrasive or a liquid buff abrasive is applied by pressure bonding or spraying to the rotating buff surface of this buff, and pressed against the surface of the workpiece for buffing.

As a conventional automatic buffing machine, a plurality of buffing machines are arranged along a polishing line to buff a workpiece according to a required buffing process, and the workpiece is equipped with a jig for holding the workpiece. There is known a straight line type automatic buffing machine that linearly transfers the work onto the polishing line by an automatic workpiece feeding mechanism.

However, the conventional automatic buffing machine is
This is for buffing a large amount of work pieces of a fixed shape efficiently and uniformly, and is not suitable for small-lot production of various types.

In particular, an automatic buffing machine suitable for buffing a workpiece having various outer dimensions and materials such as aluminum wheels for automobiles and having a small quantity has not been developed.

For this reason, conventionally, when buffing an automobile wheel, an operator carries a buffing tool having a buff attached to a rotary shaft of a motor, and the buffing does not generate vibration. However, since a large amount of dust such as metal powder, abrasive powder, buff fiber waste, and oils and fats is scattered, there is a problem that the health of workers is impaired.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a highly efficient automatic buffing apparatus capable of buffing workpieces such as automobile wheels, which are manufactured in various shapes, sizes and materials and are produced in small quantities. Is to provide.

[0008]

According to the present invention, as shown in the drawings, a buff polishing line 2, a work transfer conveyor 3 provided on the buff polishing line, and a buff polishing line are provided. A plurality of buffing machines 11, 12, 13 such as rough finish, intermediate finish, and top finish, which are provided in a fixed manner, and a workpiece holding machine that holds workpieces and sequentially conveys them to a buffing machine by a workpiece transfer conveyor. A buffing head 14 provided on each buffing machine is supported so as to be movable in directions parallel and perpendicular to the axis a of the spindle 53 of the buffing machine and tiltable with respect to the horizontal. Of the servomotors 37, 43, 47, 51 for controlling the movement amount and tilting amount of the pallet and the operation of these servomotors according to the shape of the workpiece on the pallet by a computer. Wherein the automatic buffing apparatus comprising a controller for program control.

Further, in carrying out the present invention, each buff grinder is provided with a vertical guide 3 provided on a fixed support frame 32.
4 and a vertical guide plate 33 having a screw 35 for vertical movement, a horizontal guide plate 36 slidably engaged with the vertical guide 34 on the vertical guide plate 33, and screwed with the screw 35 for vertical movement. Rotating shaft support 4 slidably engaged and screwed with a horizontal guide 41 and a horizontal feed screw 42 provided on the horizontal guide plate 36.
5 and a buff polishing vertically fixed to the shaft end of a rotary shaft 46 rotatably supported on the rotary shaft support 45 by extending the axis perpendicular to the axis of the horizontal feed screw 42. The head support plate 48, a buff polishing head 14 in which a buff polishing head body 49 is slidably engaged and screwed with a guide 50 and a feed control screw 52 provided on the buff polishing head support plate, the screw 35, 42, 52 and rotating shaft 46
Servo motors 37, 43, 4 connected to drive the
It is preferable to have a configuration including 7 and 51.

In carrying out the present invention, the conveyor transfers a plurality of support rollers 68 which are in rolling contact with only the lower surfaces of both side edges 61a and 61b of the workpiece holding pallet 61 in the workpiece transfer direction. A pair of endless chains 71 rotatably mounted about a horizontal axis extending in a direction perpendicular to the workpiece transfer direction at positions spaced apart from each other in the direction Means for continuously circulating the work holding pallet 61 by means of the supporting rollers 68 only at the side edges of the work holding pallet 61 and carrying the work holding pallet 61 on the carrying surface 63 of the conveyor. It is preferable that the opening is continuously formed in the length direction of the.

Further, the work transfer conveyor 3 is positioned below the pallet detector 59 for detecting the arrival of the work holding pallet at a predetermined buffing location by the buffing machine, and the transfer surface 63 of the work transfer conveyor. And a lifter 62 for raising and lowering the work holding pallet provided at the predetermined buff polishing location, and the lifter pushes up the work holding pallet from the conveyor conveying surface which is constantly circulated at the predetermined buff polishing location through the opening. It may be configured to hold the work piece in a predetermined buffing position.

Further, the lifter 62 for raising and lowering the workpiece holding pallet comprises a lift cylinder device 67 for raising and lowering and a rotary plate 64 which is raised and lowered by the lift cylinder device, and a plurality of positioning pins are provided on the upper surface of the rotary plate. 66 is provided so as to project, and at the raised position of the rotating plate, the positioning pin is engaged with the engaging hole 69 provided in the workpiece holding pallet so that the rotating plate is coupled to the workpiece holding pallet.
Further, it is provided with a means for rotationally driving the rotary plate in the raised position, whereby the workpiece holding pallet holding the workpiece fixedly is rotated at a predetermined buff polishing position to perform buff polishing evenly over the entire peripheral surface of the workpiece. It is better to configure so that it is possible.

Furthermore, according to the present invention, it is preferable to connect a workpiece cleaning and drying line 5 to the workpiece buffing line 3 in series. This makes it possible to effectively utilize the heat generated by the buff polishing.

[0014]

According to the present invention, as shown in FIG. 4, it is possible to automatically buff the surface shape of a variety of workpieces such as automobile wheels which are produced in a relatively small amount and have a complicatedly changing surface shape. And buffing can be performed substantially continuously from the rough finish to the top finish.

Further, the work transfer conveyor is continuously operated to constantly circulate, and the work can be picked up from the continuously operated conveyor at a predetermined buff polishing place and held at a predetermined buff polishing position for buff polishing. it can.

Further, during the buffing at a predetermined buffing position, by rotating the workpiece about its central axis, the buffing can be performed evenly over the entire peripheral surface of the workpiece.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows an embodiment of an automatic buffing machine according to the invention for buffing aluminum wheels for automobiles. In this embodiment, a conveyor 1 for carrying in a workpiece such as a wheel to be buffed, a conveyor 3 for conveying a workpiece in a buffing polishing line 2, a conveyor 4 for delivering a polished workpiece such as a buffed wheel, and cleaning. Further, the cleaning transfer conveyor 6 of the drying line 5 is arranged in a square shape, and the direction changing rollers 7, 8, 9 and 10 are provided between the successive roller conveyors.

A plurality of buffing machines 1 for rough finishing, medium finishing, finishing, etc. along the transfer conveyor 3 of the buffing polishing line 2.
1, 12 and 13 are provided at appropriate intervals,
Each buffing machine is provided with a pair of buffing heads 14 and 15 facing each other with the transfer conveyor 3 in between. Further, the cleaning and drying line 5 is provided with a cleaning treatment plant 16, a draining plant 17, and a hot air drying treatment plant 18 in sequence, whereby the finishing buffs are sequentially washed and dried to buff them. The heat generated by polishing is effectively used to improve the cleaning and drying efficiency, and the energy saving effect is obtained.

In FIG. 1, reference numeral 19 indicates a treatment place provided as a spare next to the hot air drying treatment place 18 along the cleaning and drying line 5, and 20 indicates an oil pit and 2
Reference numerals 1, 22, 23 and 24 denote drive motors for the carry-in conveyor 1, the transfer conveyor 3, the output conveyor 4 and the transfer conveyor 6, 25, 26 and 27 respectively for a buff sander control base, and 28 for conveyor drive control. Show the board.

The automatic buffing machine 11, 12, according to the present invention,
13 basically has the structure illustrated in FIGS.
In the illustrated example, the fixed support frame 3 assembled on the underframe 31
A vertical guide plate 33 is fixed to the vertical guide plate 33, a vertical guide 34 and a vertical ball screw 35 are provided on the vertical guide plate 33, and a servo motor 37 is connected to the vertical ball screw 35 via a timing belt 38. There is.

A horizontal guide plate 36 is provided on the vertical guide plate 33 so as to be engaged with the vertical guide groove 34 and screwed with a vertical feed ball screw 35, whereby the servo motor 37 rotates the vertical ball screw 35 by a controlled amount. As a result, the horizontal guide plate 36 is vertically moved by a control amount.

The horizontal guide plate 36 is provided with a horizontal guide rail 41 and a horizontal feed screw 42. A horizontal feed servomotor 43 is connected via a timing belt 44 so as to drive the feed screw 42 by a controlled amount, and is rotated. The shaft support body 45 is provided so as to be engaged with the horizontal guide rail 41 and screwed to the horizontal feed screw 42, whereby the horizontal feed servo motor 43 is rotated by a control amount to control the rotation shaft support body 45 by a control amount. It is configured so that it can only move horizontally.

As shown in FIG. 3, the buff polishing head 14 (1
The rotating shaft 46 of 5) is rotatably supported by the rotating shaft support 45, and the angle controlling servo motor 47 is attached to the rotating shaft 46.
(See FIG. 2) are connected, whereby by rotating the rotating shaft 46 by a controlled amount, the buff polishing head 14 is tilted to a required inclined position with respect to the horizontal, and the buff 54 is shown in phantom lines in FIG. The workpiece 60 at the buff inclination positions 54A and 54B shown by
Configured for buffing along the surface of the.

As shown in FIG. 3, a buff polishing head mounting plate 48 is vertically fixed to the shaft end of the rotary shaft 46, and a main body 49 of the buff polishing head 14 (15) is vertically attached to the mounting plate 48 by a guide 50. Feed control ball screw 52 that is slidably supported in the direction and is connected to the feed control servomotor 51.
Is configured so that the buff 54 can be fed in a controlled amount in a direction of an axis c perpendicular to the axis a of the buff polishing head spindle 53. In FIG. 2, reference numeral 55 is a buff polishing head driving servomotor, 56 is a nozzle tube for spraying a liquid buff polishing agent, and 57 is a counterbalance cylinder device for stabilizing the vertical movement of the vertical guide plate 33.

In the figure, reference numeral 61 is a square work holding pallet, work 60 is fixed on a work table 58 on the work holding pallet 61 by an appropriate clamp (not shown), and the pallet 61 is the work. When the pallet 61 is carried from the carry-in conveyor 1 onto the workpiece transfer conveyor 3 of the buff polishing processing line 2 and reaches the buff polishing location by the predetermined buff polishing machine, the sensor 59 detects the front end of the pallet 61, and the pallet 61 detects the predetermined state. Conveyor surface 63 of conveyor 1 at the buffing site
The pallet 61 on the transfer surface 63 of the conveyor 3 is lifted up to the pallet raising position 61A indicated by the phantom line by the lifter 62 for raising and lowering the workpiece holding pallet provided at a lower position, and the workpiece 60 is indicated by the phantom line in FIG. It is configured to hold in the indicated buff polishing position.

For this reason, at a predetermined buffing location of the buffing machine, a lifter 62 is provided on the machine base 31 so as to be able to move up and down by a lift cylinder device 67, and a rotary plate 64 on the lifter 62 is reduced by a motor 65. Is provided so as to be rotated at a low speed via a positioning pin 66 protruding from the rotary plate 64, and the positioning pin 66 is engaged with the engaging hole 69 provided on the pallet 61 on the conveyor 3 while the lifter 62 is being raised. At the lifted position of the lifter 62, the rotary plate 64 lifts the pallet 61 from the transfer surface 63 of the conveyor 3, and the rotary plate 64 is rotated to rotate the workpiece 60.
The pallet 61 to which is attached is rotated.

As described above, the workpiece holding pallet 61 on the transfer surface 63 of the moving conveyor 3 is lifted above the conveyor transfer surface by the rotary plate 64 of the lifter 62 provided below the conveyor transfer surface 63. In order to make it possible, conveyor support frames 70 are provided on both sides of the lifter 62 so as to extend along the buffing machining line 2, and these pairs of conveyor support frames 70 correspond to the width of the square pallet 61. Separated from each other at intervals, drive wheels and idler wheels (not shown) are attached to both ends in the length direction of each conveyor support frame 70, and endless chains 71 are respectively passed around these wheels to be connected to the drive wheels. The pair of endless chains 71 by the driven motor
Is configured so as to be constantly circulated in synchronization.

A plurality of support rollers 72 are rotatably supported on the respective endless chains 71 at positions separated by a predetermined distance in the lengthwise direction thereof, about a horizontal axis extending in a direction perpendicular to the lengthwise direction, The lengths of these support rollers 72 are appropriately selected so that the support rollers 72 are in rolling contact with only the lower surfaces of both side edges 61a and 61b of the workpiece holding pallet 61 in the workpiece transfer direction so that the workpiece holding pallet 61 is held. Is configured to be supported and transported. As a result, the supporting rollers 72 that limit the conveyor conveying surface 63 of the conveyor 3 are located only on both side edges of the conveyor 3 as shown in FIG. 4, and the central portion of the conveyor 3 is continuously opened in the longitudinal direction of the conveyor. As described above, the rotary plate 64 is used to convey the conveyor surface 6
It is possible to go up and down via 3.

The shapes of the workpieces to be buffed at the buffing machine control bases 25, 26, 27 are displayed on the display 73 as shown in FIG. 5, and the NC buffing machine is operated in the simulation mode as shown in FIG. The buffing head is controlled to operate the vertical movement servo motor 37, the horizontal feed servo motor 43, the angle control servo motor 47, and the feed control servo motor 51 according to the shape of the work piece in a controlled amount. It is configured to control the movements of 14 and 15 to perform buff polishing corresponding to the shape, size and material of each work piece to be processed.

The operation of the automatic buffing machine according to the invention will now be described with reference to the illustrated embodiment. First, in performing automatic buffing, a scale drawing of an automobile wheel to be buffed is electrostatically adsorbed on a charging plate in the buffing machine control stand 25, and a plurality of appropriately selected points are selected according to the shape of the automobile wheel. With the electronic pen. As a result, these points are input to the personal computer connected to the drawing board, these input points are connected by a straight line, and the pattern a is displayed on the display 73 of the computer as shown in FIG.

Next, the processing range of the buffing heads 14 and 15 of the automatic buffing machine 11 is set. As a result,
The pattern b of the buff 54 is displayed on the display 73 as shown in FIG.
Will be displayed in and the simulation will be performed.

The working range of the puffing polishing head is determined by the number of buffing polishing heads used to buff the entire surface of the workpiece to be buffed. For example, a pair of left and right buffing heads 14 and 15 of the buffing machine 11.
When the buffing is performed by using, the range on the left side of the line c in FIG. 6 is the processing range of the left buffing polishing head 14, and the range on the right side of the line d is the processing range of the right buffing polishing head 15.

When the processing range of the buff polishing head is set, the rotational speed of the workpiece, the misalignment of the center of the workpiece and the buff axis, the buff rotation speed, the buff axis moving speed, the buff polishing time, etc. are processed. Enter the conditions into your computer. Thus, the particular buffing polishing head 14, 15 selected
Is determined, and the buffing polishing heads 14 and 15 are set to move horizontally and vertically at a specific swing angle to move along the shape of the work surface.

The adjustment of the cut amount of the buff corresponding to the wear of the puff can be manually adjusted by the adjusting volume provided in the automatic buffing machine as required.

Next, when the workpiece holding pallet 61 holding the workpiece 60 fixedly is carried in from the workpiece carry-in conveyor 1 onto the workpiece conveyer conveyor 3 of the buff polishing processing line 2, when the pallet 61 reaches a predetermined position. The sensor 59 detects the front end of the pallet 61, and the lift cylinder device 67 of the lifter 62 is operated to raise the pallet 61 from the transfer surface 63 of the conveyor 3 by the lifter 62, and the model detection cylinder device 68 is operated to operate the pallet. The model of the workpiece on 61 is detected, and a model detection signal is sent to the buff sander control stand 25. Next, the pallet constant positioning cylinder device (not shown) operates to position the pallet.

Next, the motor 65 is operated to operate the pallet 61.
And the workpiece 60 is rotated at a low speed, for example, 10 rpm, and the motor 55 of the buffing heads 14 and 15 is operated to rotate the spindle 53 to rotate the buff 54 to 800-1.
While rotating at a high speed of 400 rpm, preferably 1000 rpm, the buffing head is lowered from the origin near the top dead center shown in FIG.

The horizontal feed servomotor 4 is program-controlled by a computer in the buff sander control table 25.
3. The workpiece 60 is buffed by the buffing heads 14 and 15 while simultaneously operating the angle control servomotor 47 and the feed control servomotor 51 to simultaneously control the screw 42, the shaft 46 and the screw 52, and the required buffing is performed. At the end of polishing,
The rotation of the spindle 53 is stopped, the screw 42, the shaft 46, and the screw 52 are returned to their original positions, the rotation of the pallet 61 is stopped, the lifter 62 is lowered, and the pallet 61 is moved to the conveyor 3
It is lowered onto the supporting roller 72 and transferred to the next finishing buffing machine, and similarly, the intermediate finishing and the finishing buffing are carried out.

The workpiece which has been buffed as described above is carried into the conveyor 6 of the cleaning and drying line 5 by the delivery conveyor 4 and cleaned and dried.

[0039]

According to the present invention, it is possible to efficiently perform automatic buffing of various kinds of work pieces such as an aluminum wheel, which causes a conventional problem in buffing work pieces produced in small quantities. It is possible to eliminate the problem that the health of the worker was damaged. Further, according to the present invention, the heat energy required for cleaning and drying can be saved by effectively utilizing the heat of the workpiece generated by the automatic buffing.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of a buffing apparatus according to the present invention.

FIG. 2 is a front view of a buffing grinder according to the present invention.

FIG. 3 is a partial cross-sectional view of the buffing grinder seen in the direction of the arrow along the line III-III in FIG.

FIG. 4 is a partial plan view of the workpiece transfer conveyor.

FIG. 5 is a diagram showing a pattern of wheels on a display.

FIG. 6 is a diagram showing a buff simulation on a display.

[Explanation of symbols]

 1 Workpiece Carry In Conveyor 2 Buffing Polishing Line 3 Workpiece Transfer Conveyor 4 Polished Workpiece Sending Conveyor 5 Cleaning And Drying Line 6 Cleaning Transfer Conveyor 7, 8, 9, 10 Direction Change Roller 11 Rough Finishing Buff Grinding Machine 12 Medium finishing buff grinder 13 Upper finishing buff grinder 14,15 Buff grinding head 16 Washing plant 17 Draining plant 18 Hot air drying treatment plant 19 Preparatory treatment plant 20 Oil pit 21,22,23,24 Conveyor drive motor 25,26 , 27 Buffing machine control stand 28 Conveyor drive control panel 31 Automatic buffing machine stand frame 32 Fixed support frame 33 Vertical guide plate 34 Vertical guide 35 Vertical moving ball screw 36 Horizontal guide plate 37 Vertical moving servo motor 38 Timing belt 41 Horizontal guide 42 Horizontal feed screw 43 Horizontal feed server Motor 44 Timing Belt 45 Rotating Shaft Support 46 Rotating Shaft 47 Servo Motor for Angle Control 48 Buff Abrasive Head Support Plate 49 Buff Abrasive Head Main Body 50 Guide 51 Feed Control Servo Motor 52 Feed Control Ball Screw 53 Buff Abrasive Head Spindle 54 Buff 55 Buffing head Servo motor 56 Liquid buffing agent spraying nozzle tube 57 Counterbalance cylinder device 58 Work table 59 Pallet detection sensor 60 Workpiece 61 Workpiece holding pallet 62 Lifter for lifting workpiece holding pallet 63 Conveyor transfer surface 64 Rotating plate 65 Motor 66 Positioning Pin 67 Lift Cylinder Device 68 Model Detection Cylinder Device 69 Engagement Hole 70 Conveyor Support Frame 71 Endless Chain 72 Support Roller 73 Display

Claims (5)

[Claims] 1. A buffing polishing line, a workpiece transfer conveyor provided on the buffing polishing line, and a plurality of buffing polishings provided along the buffing polishing line such as rough finish, intermediate finish and finish. Machine and a workpiece holding pallet that holds the workpiece fixedly and is sequentially conveyed to the buff grinder by the workpiece transfer conveyor, and the buff grinding head provided on each buff grinder is parallel to the axis of the spindle. And servomotors that are movable in the vertical direction and tiltable with respect to the horizontal and that control the movement amount and tilting amount of the buff polishing head, respectively, and the operation of these servomotors on the pallet. An automatic buffing machine comprising a control means which is program-controlled by a computer in accordance with the shape of the buffing machine. 2. The buffing machine comprises a vertical guide plate having a vertical guide and a screw for vertical movement provided on a fixed support frame, a vertical guide on the vertical guide plate slidably engaged with the vertical guide plate, and a vertical guide plate. A horizontal guide plate screwed with the moving screw, a rotary shaft support body slidably engaged with and screwed with a horizontal guide and a horizontal feed screw provided on the horizontal guide plate, and the rotary shaft support body. A buff polishing head support plate fixed vertically to the shaft end of a rotating shaft that is rotatably supported by extending the axis line perpendicular to the horizontal feed screw axis, and provided on the buff polishing head support plate. A guide and feed control screw, and a buff polishing head slidably engaged with and screwed to the buff polishing head main body, and a servo motor connected to drive the screw. The automatic buffing apparatus according to claim 1. 3. A plurality of support rollers, which are in rolling contact with only the lower surfaces of both sides of the workpiece holding pallet of the workpiece holding pallet in the workpiece transfer direction, are arranged in the workpiece transfer direction at positions separated from each other in the workpiece transfer direction. A pair of endless chains rotatably mounted about a horizontal axis perpendicular to each other and means for constantly circulatingly driving the pair of endless chains synchronously at mutually spaced positions parallel to each other are provided. 2. The automatic buffing machine according to claim 1, wherein a central portion of a conveyor carrying surface for carrying the object holding pallet is continuously opened in a length direction of the conveyor. 4. A pallet detector for detecting the arrival of the workpiece holding pallet at a predetermined buffing location of the buffing machine by the workpiece transfer conveyor, and a pallet detector below the conveying surface of the workpiece conveying conveyor. A lifter for raising and lowering a work holding pallet provided at a predetermined buff polishing place is provided, and this lifter pushes up the work holding pallet from the conveying surface of the conveyor which constantly circulates at the predetermined buff polishing place through the opening. 4. The automatic buffing machine according to claim 3, wherein the buffing machine is configured to hold a work piece in a buffing position. 5. The automatic buffing apparatus according to claim 1, further comprising a workpiece cleaning and drying line connected to the workpiece buffing line.