JPS58102666A - Belt sander machine for curvature grinding - Google Patents

Abstract

PURPOSE:To make it possible to efficiently and accurately machine the curvature with one grinder in such a way that a plurality of curved pads are fitted around the periphery of a rotary disc, while the desired pads are selected, multiple curvature grinding is done with a belt sander. CONSTITUTION:A plurality of pad supporting arms 20 which can be changed and fixed at the optional positions of the arciform parts are arranged at arciform guide members 18 which are protruded and fixed on one side of the outer periphery of a disc 15 that can be turned and fixed at the determined position with a bawl stop 17. Pad members 35a... which have their outsides formed to be the desired curvatures as they can stand ace to face one another in close contact with a sander belt 5 are fixed to the respective supporting arms 20. All the pad members can be respectively changed their positions in the axial directions of the disc 15. When machining, the disc 15 is turned, the desired pads are fixed opposite to a work (a), grinding can be done with the sander belt 5.

Description

Detailed Description of the Invention The present invention relates to a belt sander for polishing a curved surface of a workpiece having a curve in a direction perpendicular to the feeding direction (cross-sectional direction), and the belt sander machine is attached to a rotating shaft and is attached to a rotating shaft to reduce the angle of the number of turrets. A rotary disk that can be fixed to the sanding belt is installed inside the polishing running section of the endless sanding belt, and corresponds to the partial surface divided into a plurality of parts in the width direction of the surface to be polished of the workpiece that comes into pressure contact with the sanding running section. ,
The present invention is characterized in that a plurality of curved pads are mounted on the rotary disk and are brought into pressure contact with each of the partial surfaces in sequence via a sanding belt, and are stopped at positions in contact with the polishing running section.

When polishing a complex curved surface on the surface to be polished of a workpiece, it is difficult to form curved pads that precisely match the surface to be polished, so it is usually done in the width direction of the surface to be polished. It is necessary to sequentially press a plurality of curved pads corresponding to the partial surfaces divided into a plurality of parts onto a sanding belt, and to polish the surface to be polished of the workpiece in several steps in the width direction.

Conventionally, a belt sander equipped with one polishing device was used, and each of the multiple curved pads was replaced at each step to sand the surface of the workpiece [the surface was divided into several steps in the width direction]. However, in order to eliminate the need to replace the pad, this was done using a composite belt sander equipped with multiple sets of polishing devices each consisting of a single sanding belt and a curved pad placed in contact with the inner surface of the sanding belt. For this reason, the former requires a lot of work to process;
The latter had disadvantages in that the equipment was large and expensive.

The present invention is a Wynod belt sander for curved surface polishing that eliminates the above-mentioned drawbacks by making it possible to perform multiple steps of curved surface polishing with one polishing device without requiring any work to remove or attach the curved surface pad. The purpose is to provide equipment.

1 to 3 show a first embodiment of the present invention, in which l is a sanding frame horizontally arranged behind the material feeding path λ, and a rudder driven by a motor is mounted on the frame l. A dual-purpose drive roll 3 and driven rolls g, g are arranged in a triangular arrangement, and a sanding belt S running on a horizontal plane is passed around each roll, and the linear feeding section between the driven rolls 4.1 is connected to a material feeding path. Face the rear side.

A support frame 6 is mounted on the sanding frame 1, and an air cylinder 7 is arranged perpendicularly to the material feeding path on the frame 6, and two parallel rods 9 and 2 are connected to the movable plate at the front end of the piston rod. and their shafts are slidably supported by bearings to, in.

ll is a support casing provided at the front end of the rod 9.9, and a cylinder l- projecting upward from the support casing ll has a (b) turntable Is.
The rotary shaft /6 is fitted and supported. The tip of a swingable engagement claw 13 attached to the support casing // is placed on the lower end surface of the rotation shaft 11 to freely rotate and support the engagement claw 13.
The support bolt /& screwed into I allows the entire support position of the rotating shaft 11 to be changed, thereby making it possible to adjust the vertical position of the shaft 76.

The rotary disk tS is designed to be able to stop at several angles within the tube 12.
The ejection moderation pole 17 provided on the cylinder/- is fitted into either of the Saijo engagement grooves /Ga at intervals of 000 to maintain the stop position.

The rotary disk IS has a pair of arc-shaped support guides on the left and right sides.
Install I at intervals of 900 in the circumferential direction. Each support guide/I
There is an arc-shaped guide groove that becomes a concave arc shape on the rear side of the material feeding path 2.
ffa, /ffa are provided, and a pair of left and right support guides /l,
/Ir, fit the arc-shaped sliding plate at the protruding base end of the crank-shaped pad support arm O as shown in Fig. 2.3, and screw the screws λ protruding from both sides of the plate into each circle. Arc-shaped guide groove/
Nut λ passed through ffas /ffa and screwed together from the outside.
Fix by 3. A pair of left and right tube shafts J41 in the vertical direction are screwed into the horizontal part of the tip of the pad support arm 20 as shown in FIG. 26, and loosely fit the wing pieces 30 protruding left and right on the rear side of the pad support plate 31 on the front surface of the attached body 9 into the upper part of the support rod roller, and the collar 2S at the upper end of the tube shaft koda.
The mounting body 29 is supported by a spring 33 fitted between the wing piece 30 and a spring 3q fitted between a nut 7 fitted to the upper side of the wing piece 30 and the upper end of the support rod roller.

The spring 33.3q absorbs abnormal pressure on the curved pad due to knots left on the polished surface of the workpiece during polishing with the curved pad described later, and enables smooth polishing. be. Jj is a positioning nut screwed onto the lower end of the support rod roller. The pad support plate 31 has one of the curved pads 3sa to Jjd attached to its front surface, and has attachment arms 3-that protrude rearward from both sides thereof.
is detachably fixed to the strip 30.

The curved pads JSa to Jjd are formed by dividing the curved surface to be polished in the cross-sectional direction of the workpiece a into a plurality of parts in the width direction, as shown in FIG. First, since the sanding belts j are used to correspond to each other, it is necessary to change the positions of the curved pads jJ& to Jjd in the width direction with respect to the workpiece a. For this purpose, each can be freely changed by rotating the tube shaft q or adjusting the positioning nut it and the nut core. In addition, by sliding the arc-shaped sliding plate 21 on the arc-shaped guide grooves /ffa, /Ia and adjusting it up and down, the curved pads 3Sa to 3
! d can be tilted separately, and by such adjustment each curved surface pad 33EL to Jjd can be tilted to the corresponding partial surface b.
−.

~B-4 is pressed from a substantially perpendicular direction.

The operation of the above embodiment will be explained.

Machining with a complex curved surface to be polished as shown in Figure 4 □
In order to polish material a, pad support plate 3 is attached with curved pads J3a to 3Sd, which have curved surfaces that match the respective divided surfaces of the curved surface to be polished, and whose boundaries are made slightly heavy.
It is attached to each mounting body 9 in the circumferential direction of the rotary disk IS.

Next, the model material is placed in the material feeding path, the vertical position of the rotary disk is adjusted up and down with the support bolt 1a, and the curved pads JJa-~Jr are further adjusted as described above for the tube axis J&, etc.
d is the part kib-1 of the curved surface to be polished of the workpiece a;
First, the curved pad 3Sa is pressed against the inner surface of the polishing running portion between the driven rolls η and 9 of the sanding belt j by rotating the rotary disk /S manually or by power, corresponding to each husband A of the sanding belt j. Positioning is carried out, and the processing material a is made to correspond to the front side of the abrasive traveling part of the sanding belt S, and the passage interval of the material feeding path 2 is freely adjusted. The material a is held by the pressing belt 31 on the upper surface, is accurately determined and fed by the material feeding belt 37 on the lower surface, and the curved surface pad 35a is brought into pressure contact with the partial surface b- of the curved surface to be polished via the sanding belt S. The workpiece is polished by repeating the procedure of polishing the partial surface b- by pressing, and then moving the curved pads 33a to 33a to 33j and td to the inner surface of the polishing running portion of the sanding belt j at 900 revolutions of the rotary disk is. Partial surfaces b-,, b-3, b- of a
4 in sequence.

The above method can be applied even when polishing partial surfaces b-, and then polishing partial surfaces b-2, . . . , #b-4 can also be used when polishing.

FIG.
A shaft supporting cylinder g/ is attached on top, and an elevating shaft holder with a rectangular cross section is passed through the cylinder gl to make it non-rotatable but vertically movable, and the shaft Uλ
The upper end of the rotating shaft/4 and the center of the thrust bearing 41
Connect via 3. A rack u& in the vertical direction is provided on the side surface of the lifting shaft q-, and a pinion aS at the tip of the drive shaft of the lifting motor M1 mounted on the frame ttQ is attached to the rack g<+.
are engaged, and the elevation of the rotary disk is adjusted by driving the elevation motor. The drive shaft can also be rotated by a handle g provided outside the support case ii. Further, a rotary motor M2 is fixed to the lifting shaft 2, and the gear of its drive shaft is engaged with an internal gear 7 provided on the inner circumferential lower edge of the rotary shaft /6, and the rotary motor M2 is driven by the rotary motor M2. S is rotated to transfer the required curved pads 33h to JSd to the polishing position. There are four locking pieces at 900-degree intervals from the lower end of the rotating shaft/4? If is protruded and the limit switch Ls2 is attached to the inner surface of the cylinder/J, the switch LS2 is rotated on 900 times by the locking piece as the rotary disk is rotates. Further, as shown in FIG. 7, a limit switch Ls is provided at the polishing position to detect passage of the front end and rear end of the workpiece.

The above action will be explained.

When the workpiece a is forwarded by the material conveying belt 37 and polished by the first curved surface band 3Sa over the corresponding partial surface b- of the curved surface to be polished, the limit switch LS detects that the rear end has passed. do. As a result of this detection, the material feeding motor is stopped after a certain period of time, the rod 9.9 of the air cylinder 7 is contracted, and the rotating motor pigeon is driven.
Additionally, the timer Tl is activated. Therefore, the rotary disk /S retreats and rotates, and at the 90° rotation position, the limit switch LS2 is turned on by the locking piece at, and the rotary motor M2 is stopped. The first curved pad Jjb is then placed at the polishing position. Thereafter, as the timer T expires, the material feeding motor is reversed, the workpiece a is fed backward, and the partial surface b-2 is polished. When the rear end of the workpiece a reaches the polishing position, switch L
When s is turned on, the rod 9 expands again and presses the curved pad Jjb through the sanding belt S against the surface to be polished. , △ The entire surface of the surface to be polished is polished by repeatedly bending the pad, isc, and every 3sd. In the polishing process, by using a counter that is activated every time the limit switch Ls2 is activated during the polishing process, it is possible to select a desired curved pad and polish it. That is, only the 71st curved pads 33i and JjD are respectively stopped at the polishing position, and the curved pads 330. Jumping over JJD and becoming the first
It may also be possible to stop the th curved surface pad J5a again at the polishing position.

Figure 5.6 shows a third embodiment of the invention, in which the rod 9.9
A rotating shaft 32 is passed between the shaft supporting pieces 3o and so attached to the front end of the rotary shaft Sλ, and a surface turning disc S/ having four mounting plates S3 radially arranged on the rotating shaft Sλ is rotatably supported. As in the first embodiment, an arc-shaped support guide IT, a pad support arm 20 supported by the guide I, a mounting body 29, etc. are attached to each mounting plate S3.

Required curved pads 33 &~ attached to each mounting body 2q
To hold Jjd in the polishing position, rotate the rotary disk si and transfer it to the polishing position, rotate the push screw s4 (screwed onto the shaft support piece 50), and use its tip to touch one side of the rotary disk si. It is applied by pressing it to the other side along the rotating axis j- and supporting it so that it cannot freely rotate.In this embodiment, the rotary plate st is rotated in the vertical direction to place one of the curved pads JJ&~JSd at the polishing position. Because each curved pad J
There is an advantage that the vertical position and tilt position of gh to J5d can also be adjusted by the rotation stop position. The other functions of this embodiment are the same as those of the previous embodiment, and will therefore be omitted.

As clarified by the above description, the present invention includes a rotary disk/3 and a SLL film installed at the front end of the rod of a longitudinal drive device, and each division of the polished curved surface of the workpiece a into which the rotary disk can move up and down. A plurality of curved pads JSa having different curved surface shapes corresponding to partial surfaces b-, ~b-, △
~3jd is attached in the circumferential direction to the rotary disk/-j.

Since one of the required curved pads 33a to 35(l) is arranged at the polishing position by rotating Sl, the complicated curved surface of the workpiece to be polished can be polished by a large number of curved pads 33ar to 3J.
When polishing is performed sequentially by d, the rotary disk /,! By selectively rotating r/, it is possible to easily and quickly replace the required curved pad with the curved pad Jj&~3.
The removal and installation of Sd for each step does not require any work, which improves the efficiency of the processing work, and also because it is carried out by a single polishing device that shares the sanding belt 11 front and rear drive device 7, etc. , the device has excellent effects such as being smaller and cheaper.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, FIG. 1 is a plan view, FIG. 2 is a partially cutaway side view, FIG. 3 is a longitudinal sectional side view of the pad support device, and FIG. is a vertical side view showing the relationship between the curved surface to be polished and the curved pads Jla to 3gd, FIG. S is a vertical side view of the second embodiment, and FIGS. is a plan view, and FIG. 7 is a side view. 7→Air cylinder, 15, 5/→Rotary disk, 16, Sλ→
Rotating axis, /r→support guide, ko. →Pad support arm, Ko9→
Mounted body, a - Processed material, b -> Curved surface to be polished Figure 3 Commissioner of the Patent Office L, Indication of the case Patent application Sho! t-/9199g3, Relationship with the person making the amendment Applicant 4, Agent 5, Date of amendment order Showa year, month, day (
Voluntary amendment) 6. Number of inventions to be increased by amendment 7. Subject of amendment Description and drawings Patent application 1977-tqtqqu Contents of amendment/, Specification details in page r to line 9 [vertical direction left/right...・
``Insert the screws'' and replace it with ``Insert the pair of left and right tube shafts 2μ in the vertical direction as shown in Figure 2.3.
Insert this screw,” he corrected. 2. In the same page 1/page 12, line 12, ``internal gear q7'' is rewritten as ``internal gear g7''. 3. In the first line of page 1u of the same page, it says "protrude...onto the inner surface".
1 side,” he corrected. 1. In the same page, page ig, line S, the text ``Figures 3 and 6'' is corrected to ``Figure 1 ≦, Figure 7''. S. Correct figure 5 of the attached drawings as shown in the attached sheet. The most evil

Claims (1)

[Claims] A rotary disk /j, which is attached to the rotating shaft l and can be fixed at multiple angles, is installed inside the sanding running section of the endless sanding belt S, and the width of the polished surface of the workpiece that is pressed against the sanding running section is provided. (b) A plurality of curved pads 3ja to 3sd corresponding to the partial surfaces cut into a plurality of parts in the direction and sequentially pressed against each partial surface via a sanding belt are attached to the turntable lj; A belt sander for polishing a curved surface, characterized in that the belt sander is stopped at a position in contact with the polishing running section.