KR20020065391A - Oscillation attachment device - Google Patents

Abstract

PURPOSE: To provide an attachment for honing mounted on a working machine to effect working through rotation of a main spindle, and capable of exerting rotation and axial vibration on a tool for working, and being compact and solid. CONSTITUTION: The attachment is mounted on a working machine having a rotary main spindle, transmits rotation of the main spindle to a tool for working, and exerts axial vibration on a tool. The attachment comprises an offset joint to bring rotation, inputted from the working side to a disc on the input side, into an eccentric state by a link to effect crank motion an eccentric amount adjusting device to adjust an eccentric amount of the offset joint a hook joint formed that an end part on the drive side is coupled to the disc on the output side of the offset joint and an output shaft coupled to the end part on the driven side of the hook joint. The output shaft is rotatably and vertically movably supported and a mounting part for tool is situated at an end part on the opposite side to the hook joint.

Description

Honing Vibration Attachment {OSCILLATION ATTACHMENT DEVICE}

The present invention is installed on a machine that performs processing by the rotation of the main shaft, such as an upright drilling machine, machining center (machining center), CNC bowl (fraise bowl), vibration accessories for honing to impart rotation and axial vibration to the machining tool ( attachment).

For example, a honing machine for polishing an inner surface formed on a work piece attaches an abrasive to a tool called a horn, inserts it into the inner hole of the work piece, and moves it up and down while rotating to perform polishing. In such a case, in order to obtain a good polishing surface, it is known that it is effective to vibrate the tool horn up and down (axial direction) in addition to the rotation and the vertical motion.

As a mechanism for imparting vibration to a tool such as a horn, the housing supporting the rotating main shaft is vertically moved by rotating the eccentric shaft with a motor (particularly 61-288971) and abutting an eccentric disk having an inclined surface. Vibration of the main shaft by vibrating rock levers (Patent No. 2602165) and the like have been known in the past. In the above-mentioned prior art, since all the springs exert a force in the downward direction of the main shaft, a lot of force is required when moving upwards, and an eccentric load is applied, and thus there is a problem such as wear or damage.

In order to improve the above problems of the conventional apparatus, a honing machine capable of vibrating the main shaft in the axial direction with less force has been proposed (Patent No. 3071185). The honing machine associated with the said patent 3030785 is a mechanism as shown in FIG. That is, the main shaft head 101 moving relative to the workpiece; and the horn 102 at one end coaxially, the axial direction is the same direction as the relative movement direction of the main spindle head, A main shaft (103) freely supported on the spindle head so as to be movable in the axial direction; and a drive motor having a drive shaft (104) fixed to the spindle head to rotate the spindle; and between the spindle and the drive shaft. An intermediate shaft 105 disposed to transmit rotation of the driving shaft to the main shaft; and one end of the intermediate shaft not connected to one end of the intermediate shaft and the other end of the driving shaft and the intermediate shaft, and having two or more bending points. Two connecting members (universal joints) 106 and 106 capable of rotating transmission even in the state; and the intermediate shaft in a direction perpendicular to the axial direction so as to reciprocate the main shaft in its axial direction. It was added to force the intermediate shaft and a reciprocating mechanism 107 for reciprocating movement parallel to the middle axis.

In the above apparatus, when the drive shaft 104 is rotated, the rotation is transmitted to the main shaft 103 via the intermediate shaft 105 and the two joints 106 and 106, but it is shown in FIG. 9 (b). As shown, when the intermediate shaft 105 is moved in parallel to the direction perpendicular to the axial direction of the main shaft 103, the intermediate shaft 105 is moved up and down, and this movement is transmitted to the tool as a horn through the main axis. do.

In addition, in a machine having a rotating main shaft, as shown in Fig. 10, the rotational and vertical vibration is applied to the tool. As shown in Fig. 10, the position of the cross pin holes does not intersect with one point, and the hole position is a predetermined distance d. By means of coupling cores spaced apart by a distance, the hook joint is coupled between the primary joint 121 and the middle joint (distance between points L) 120 and between the middle joint and the driven joint 122, respectively, the joint joint ( A vibration generating device 125 has been known since the filing of Patent No. 3071185, in which the driven joint 122 is inserted into the joint so that the driven joint 122 is moved horizontally so that the axis of the driven joint 122 is deviated with respect to the axis of 121). (Public Service No. 52-41908). The device is coupled to the main joint 127 of the drilling machine (121) side, the chuck (fit) is inserted into the driven joint (122) side to mount the drill 128, and two vertical vibrations per drill rotation It is made to puncture while giving. In Fig. 10, angle α is an inclination angle caused by eccentricity. In the driven joint side, since the center shift occurs in the vertical direction with respect to the main axis 127, centering with the workpiece is necessary.

Unlike the rotary mechanism, the honing machine according to the above-mentioned Patent No. 3071185 has an intermediate shaft reciprocating mechanism and can obtain vibration by reciprocating the intermediate shaft in the direction perpendicular to the axial direction. Since the apparatus can impart axial vibration to the tool by using the rotary motion itself, it can be said that the device is structurally simpler than the structure described in Patent No. 3071185.

However, the vibration generating apparatus of the honing machine according to the Patent No. 3071185, the intermediate shaft 105 having the shaft connecting members (material joints) 106, 106 having two or more bend points at the upper and lower ends of the driving motor It is mounted between the drive shaft 104, which is an output shaft, and the main shaft, and the intermediate shaft is oscillated up and down by moving the intermediate shaft in parallel with the axis of the drive shaft and the main shaft. Because of vibrating up and down two material joints (106, 106) and the intermediate shaft 105 is essential, there was a problem that the length of the vertical length is only long. In addition, a transverse device for reciprocating the intermediate shaft 105 laterally at predetermined intervals, for example, an apparatus in which an eccentric disk 111 is provided on the output shaft of the motor 110 is required. In this respect, too, it is structurally complicated. Therefore, when such an apparatus is attached to an existing processing machine, a large space is required between the rotating main shaft of the processing machine and the workpiece, thereby causing a practical problem.

On the other hand, since the vibration generating device is incorporated in the drill cutting device main body, the apparatus of the above-mentioned special public office No. 52-41908 changes the eccentricity (amplitude), causing the center deviation from the main shaft, and the previous machining step for use as a honing device. It was inconvenient in practical use because it was necessary to align the hole center after reamer processing. Therefore, the present invention effectively utilizes the principle of the conventionally known vibration generating mechanism, and is easily installed in a conventional upright drilling machine, a machining center, a CNC lathe, and the like. The task is to provide.

1 is a front view showing an example of the accessory of the present invention.

2 is a perspective view of an eccentric joint.

3 is an explanatory view of the working principle of the eccentric joint.

4 is an external view showing an exploded state of the hook joint.

FIG. 5 is an external view showing an example of a hook joint different from FIG. 4; FIG.

6 is an external view showing another example of a hook joint.

Figure 7 is an external view showing an example installed in the perforator.

8 (a) is an external view of a mounting apparatus for installing an accessory.

Figure 8 (b) is an external view of the accessory mounted on the mounting device for installing the accessory.

Fig. 9A is a structural explanatory diagram of a conventionally known honing machine.

9 (b) is an explanatory view of the intermediate shaft operation of a conventionally known honing machine.

10 is an explanatory view of a conventionally known vibratory drill cutting device.

<Explanation of symbols for the main parts of the drawings>

1: Attachment 5: Frame

7: input shaft 8: spindle

10: eccentric joint 20: eccentric amount adjustment device

30: hook joint 40: output shaft

42: Chuck M: Machine

H: Tool W: Workpiece

In order to solve the said subject, this invention employ | adopted the following structures. That is, the honing vibration accessory according to the present invention is an accessory device which is installed in a machine having a rotating main shaft and transmits the rotation of the main shaft to a processing tool and imparts axial vibration to the tool. An input shaft connected to the main shaft; and an eccentric joint for outputting the eccentric rotation by a plurality of discs superimposed with each other by inserting a link device for crank motion; and a structure in which the positions of two intersecting shafts in the joint are deflected in the electric direction Hook joint of; And an output shaft for supporting the tool so as to be freely rotated and freely oscillated in the axial direction, wherein the output shaft and the input shaft are connected through the eccentric joint and the hook joint.

The accessory device of the present invention uses an eccentric joint composed of a plurality of disks and a plurality of links arranged between the disks, and a hook joint having a structure in which two axial positions intersecting each other in the material joint are deflected in the electric direction. It features. The above-mentioned eccentric joints are specifically described in Japanese Patent Application No. 44-19486 (torque transmission device), for example, 'Three-Nine Coupling (3-9) manufactured by Nippon Piston Ring Co., Ltd. coupling) '(SC series) (trade name) can be used as appropriate. 2 is an external view showing an example of an eccentric joint of the present invention. The principle of the eccentric joint will be described later.

The vibration generating accessory of the present invention uses an eccentric joint with a relatively short overall length and a hook joint, so that the upper and lower parts are connected to a pair of material joints, such as an intermediate shaft installed in a honing machine according to Patent No. 3071185. Since the intermediate shaft, which is connected to the shaft and moves up and down itself, and the device for reciprocating the intermediate shaft at predetermined intervals are unnecessary, the structure is simple and the overall length is shortened. In addition, the eccentric joint is a structure that fits a plurality of disks into the linkage and overlaps it, so it is firm and short in overall length, so it is installed in a commercial machining center, a CNC lathe, an upright drilling machine, and used for honing and lapping. It is suitable to

Hereinafter, preferred embodiments of the present invention will be described in detail.

Fig. 1 shows an example of an accessory according to the present invention, and the accessory 1 is a framework 5 which is installed in a couper 3 of an upright drilling machine M showing an example of a processing machine. The input shaft 7 is supported by the upper end of the base 5 so as to rotate freely. The input shaft 7 is connected to the main shaft 8 of the machine, and the rotation of the main shaft is transmitted. Reference numeral 9 is a detachable fixing means capable of firmly fixing the base 5 to the processing machine, and in the illustrated example, a fixing ring 9a that is tightly fixed to the outer circumference of the kuir 3 of the processing machine, Although it has a bolt (9b) for fastening the fixing ring, it is good if there is a means for firmly installing the frame (5) to the machine, and other suitable means, for example, in the screw hole provided on the machine side Various means, such as a thing provided with the bolt screwed in, can be employ | adopted.

At the lower end of the input shaft 7, an input disk 11, which is an end disk of the eccentric joint 10, is fixed. The eccentric joint 10 includes a plurality of disks (three in the illustrated example), that is, input and output disks 11 and 13 and intermediate disks 12, which are upper and lower ends, and the input disk 11 and the intermediate disk. The linkage 14 which consists of three links which are supported so that it can rotate freely with a bearing between 12 and the output disk 13 which is an intermediate disk 12 and the other end disk is mounted.

The working principle of the eccentric joint 10 is as shown below. That is, Figure 3 schematically shows the relationship between the input and output disk and the intermediate disk, the disk, link, and pins are all rigid, each section is connected to free rotation, each disk is also free rotation It becomes a state. When the input disk 11 rotates α degrees around the zero point and moves to A → a, B → b, C → c in Fig. 3, the links AA ', BB', CC 'are aA', bB ', cC ', but the length of the link does not change, and it moves to A' → a ', B' → b ', and C' → c '.

Here, in the quadrilateral OAA'O ', since there is a relationship OA = O'A' and AA '= OO', this quadrilateral is a parallelogram. Since AA '= aa', the quadrilateral Oaa'O 'is also parallelogram, and AOa = A'O'a' = α. The above relationship is the same for the other links BB 'and CC'. From the foregoing, it can be seen that the intermediate disk 12 makes exactly the same rotation as the input disk 11. The same applies to the intermediate disk 12 and the output disk 13. In other words, even if the axial centers of the three disks are eccentric, the rotation of the input disk 11 can be accurately transmitted to the output disk 13 via the link device 14.

The input shaft 7 is connected to the upper surface side of the central portion of the input disk 11 of the eccentric joint 10, and the input shaft 7 is supported on the base 5 so as to be freely rotated by bearings. In addition, the input shaft 7 is connected to the main shaft 8 of the processing machine M by a suitable connection means known in the art. The output disk 13 is provided with an eccentricity adjusting device 20 as a horizontal moving device. The eccentric amount adjusting device (lateral movement device) 20 moves the second output shaft 15 in a direction perpendicular to the axial direction of the output shaft (not reciprocating), thereby adjusting and fixing the lateral position of the output shaft. Therefore, the slide shaft 22 supported so that the bolt 21 screwed into the screw hole formed in the base 5 and the frame on the opposite side of the base 5 can be freely slid. And a second output shaft 15 fixed to the output disk 13 in a circular hole formed in the center portion of the horizontal movement member, supported by the bearing. have. The drive side frame 31 of the hook joint 30 is fixed to the lower side of the second output shaft 15.

The hook joint 30 has the same structure as the conventional publicly known art described in the above-mentioned 52-41908, and as illustrated in FIG. 4, a coupling core between the drive side frame 31 and the driven side frame 32. Intermediate joint 35 is provided by interposing (33). The coupling core 33 is formed with pin holes 33a and 33b perpendicular to each other, and the positions of these two pin holes are spaced apart by a distance d. In this way, since the positions of the two pin holes in the direction crossing each other are spaced apart, vibration in the vertical direction occurs at the time of rotation. This vibration is twice per revolution. In addition, it is reported in detail about the axial vibration of a hook joint. (Kitchen, a foot) "Analysis of a hook joint which gives an axial vibration" Osaka Institute of Technology natural science edition 46, 1976, 61 ~ Page 67)

Of the two pin holes, a pin 34a supported by the driving side frame 31 or the driven side frame 32 is inserted into one pin hole 33a, and the coupling core 33 is driven by this pin. ) Is supported to swing freely. In addition, a pin 34b is inserted into the other pin hole 33b to rock the end of the intermediate joint 35 freely.

The output shaft 40 is installed in the driven side frame 32 of the hook joint 30. The output shaft 40 is freely supported on the frame 5 in the free rotation and vertical movement, the lower end thereof is a tool installation portion is provided with a chuck 42 for installing a tool (H), such as a horn.

Next, the usage of the accessory apparatus 1 of this invention is demonstrated. The accessory device 1 of the present invention is used by being installed in the processing machine M, which is processed by the rotation of the main shaft, for example, the upright punch in Fig. 7. In this installation, the upper part of the base 5 may be fixed to the kuir 3 of the processing machine M by fixing means. At the same time, the input shaft 7 of the eccentric joint 10 is connected to the main shaft 8 of the machine, and the tool H such as a horn is attached to the chuck 42 provided on the output shaft 40 of the accessory 1. Install. The workpiece W is positioned and fixed to the lower side of the tool as in the prior art.

In the above state, the machine M is started to rotate the main shaft 8, and the three disks of the eccentric joint 10 are moved relative to each other by the desired amount in the eccentricity control device 20 at the same time. As a result, the rotation of the main shaft 8 is eccentrically transmitted to the drive side frame 31 of the hook joint 30. In addition, since the driven side frame 32 of the hook joint 30 is held by the output shaft 40 so as to move freely up and down to the same axis center of the main shaft 8, the shaft center of the drive side frame 31 is the shaft center of the main shaft. Departing from the middle joint 35 is inclined. Therefore, the driven side frame 32 goes up by the said inclination with the output shaft 40 and a tool. In addition, the amplitude of the vertical vibration of the tool is determined by this amount of eccentricity, but this amount of eccentricity can be appropriately adjusted even during operation with the eccentricity control device 20.

In this way, when the input side and the output side of the hook joint are rotated in an eccentric state, it is as described in the above-mentioned Japanese Unexamined Patent Application Publication No. 52-41908. When this accessory 1 is attached to a processing machine and processed, the tool can be subjected to vertical vibration as well as rotation.

Since the accessory device of the present invention uses only the eccentric joint 10 and one hook joint 30 as the joint apparatus, the entire length (up and down length according to the illustrated drawings) can be shortened. In addition, since the apparatus for eccentric rotation axis is used, a lateral movement device (eccentricity control device) 20 is used to shift the disk of the eccentric joint 10 to the side and maintain the eccentric position. And transmit the rotation accurately. Furthermore, as in the conventionally known honing machine (Patent No. 3071185), since there is no intermediate shaft which is connected to both sides and moves up and down itself, it is also structurally simple and can be miniaturized in this respect.

Next, Fig. 5 represents an embodiment different from the above. In this embodiment, the intermediate joint 35 'of the hook joint is folded by 90 degrees. In this way, the vibration per rotation becomes one time. The other part is the same as that of the said embodiment.

6 shows another embodiment, in which the two pins 51, 52 of the lower joint portion 50 of the middle joint 35 of the hook joint are connected as usual materials. Orthogonal to each other. In this example, the entire length is shortened by the portion corresponding to the positional displacement length d of the pin.

Moreover, FIG. 8 shows an example in which the mounting device 60 for mounting the accessory device 1 of the present invention to the machining center is installed. The above-mentioned mounting apparatus 60 connects the 2nd input shaft 61 to the rotating shaft of a processing machine (machining center), and transmits the rotation to the input shaft 7 of the accessory 1, The mounting apparatus prepared previously in this way If it is installed in the processing machine by using it can be easily removable because it is convenient.

As is apparent from the above description, the accessory related to the present invention is a novel device that has never existed in the past, and can be honed or wrapped by using an inexpensive processing machine such as an upright drilling machine without significantly modifying an existing processing machine. In addition, it not only effectively transmits the spindle rotation of the machine to the tool. Since the tool can be vibrated up and down using this rotor itself, it is suitable for processing by being installed in a machine which requires rotation and axial vibration to the tool. Moreover, since the intermediate shaft which reciprocates up and down and the apparatus which reciprocates the intermediate shaft are unnecessary, it is structurally compact and rigid. The accessory of the invention may also be used for processing other than the honing of the example shown.

Claims (3)

An accessory device installed in a machine having a rotating main shaft, which transmits the rotation of the main shaft to a machining tool and imparts axial vibration to the tool, comprising: an input shaft connected to a rotating main shaft of the processing machine; and An eccentric joint which eccentrically rotates the output by a plurality of discs superimposed on each other by inserting a link device for crank motion; and Hook joints in which the position of two intersecting shafts in the joint is deflected in the electric direction; And And a tool support output shaft supported to freely rotate and freely oscillate in the axial direction. And said output shaft and said input shaft are connected via said eccentric joint and said hook joint. The vibration accessory for honing according to claim 1, further comprising an eccentric amount adjusting means for adjusting an eccentric amount of the eccentric joint. The vibration accessory for honing according to claim 1 or 2, wherein the output shaft is supported by a base so as to be concentric with the main axis of the processing machine.