JP2002233946A - Vibration attachment for honing - Google Patents

Abstract

PROBLEM TO BE SOLVED: 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. SOLUTION: 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

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attachment which is attached to a machine such as an upright drilling machine, a machining center, a CNC milling machine, etc., which performs machining by rotating a spindle, and imparts rotation and axial vibration to a machining tool. It is.

[0002]

2. Description of the Related Art For example, a honing machine for polishing an inner surface of a hole provided in a workpiece is a method in which an abrasive is attached to a tool called a horn, inserted into the hole of the workpiece, and moved up and down while rotating. Then, polishing is performed. In this case, in order to obtain a good polished surface, it is known that it is effective to vibrate the horn as a tool vertically (axially) in addition to the rotation and the vertical movement.

As a mechanism for applying vibration to a tool such as a horn, a mechanism for rotating a eccentric shaft by a motor to move a housing supporting a rotating main shaft up and down (Japanese Patent Application Laid-Open No. Sho 61-1986).
No. 2,889,971), or a type in which a main shaft is vibrated by a swinging lever that is in contact with an eccentric disk having an inclined surface (Japanese Patent No. 26889).
No. 02165) is conventionally known. All of these conventionally known springs urge the main shaft downward by a spring, so that a large force is required when moving the main shaft upward, and since an eccentric load is applied, wear and breakage are likely to occur. It is said that there is a problem.

As a solution to the above problems of the conventional apparatus, there has been proposed a honing machine capable of vibrating the main shaft in the axial direction with a smaller force (Japanese Patent No. 30300).
No. 71185). The honing machine according to Japanese Patent No. 3071185 has a mechanism as shown in FIG. That is, a spindle head 101 that moves relatively to the workpiece and a horn 102 at one end are coaxially held, and the axial direction is the same as the relative movement direction of the spindle head, and the spindle head is rotatable. And a drive motor fixed to the spindle head and having a drive shaft 104 for rotating the spindle, located between the spindle and the drive shaft. An intermediate shaft 105 that transmits the rotation of the drive shaft to the main shaft, one end where the horn is not held, one end of the intermediate shaft, and two or more bending points that connect the drive shaft and the other end of the intermediate shaft. Connecting members (universal joints) 106 that can transmit rotation even in a bent state
106, and an intermediate shaft reciprocating mechanism 107 that urges the intermediate shaft in a direction perpendicular to the axial direction to reciprocate the intermediate shaft in order to reciprocate the main shaft in the axial direction. .

In this device, when the drive shaft 104 is rotated, the rotation is transmitted to the main shaft 103 via the intermediate shaft 105 and the two universal joints 106, 106, as shown in FIG. 9 (b). When the intermediate shaft 105 is translated in a direction perpendicular to the axial direction of the main shaft 103, the intermediate shaft 105 moves up and down, and this movement is transmitted to the horn as a tool via the main shaft.

In a processing machine having a rotating spindle,
As shown in FIG. 10, the rotation of the tool and the vibration in the vertical direction are applied to the tool. Driving joint 121 and intermediate joint (distance L between fulcrums) 1
20 and between the intermediate joint and the driven joint 122, the driven joint can be moved in the horizontal direction such that the axis of the driven joint 122 is shifted with respect to the axis of the driving joint 121. A vibration generator 125 incorporated in a joint frame has been known before the application of Japanese Patent No. 3071185 (Japanese Patent Publication No. 52-4190).
No. 8). In this apparatus, the driving joint 121 is connected to the main shaft 127 of the drilling machine, and the driven joint 122 is equipped with a drill 128 via a chuck. The drill 128 can be pierced while giving up and down vibration twice for each rotation of the drill. It has become. The angle α in the figure is an inclination angle caused by eccentricity. In addition, since the driven joint side has a misalignment in the vertical direction with respect to the main shaft 127, it is necessary to align the center with the workpiece.

The honing machine disclosed in Japanese Patent No. 3071185 obtains vibration by reciprocating the intermediate shaft in a direction perpendicular to the axial direction by providing an intermediate shaft reciprocating mechanism separately from the rotating mechanism. Above 52-5
The apparatus of No. 1908 can apply an axial vibration to a tool using the rotary motion itself.
It can be said that it is structurally simpler than the structure described in No. 1185.

[0008]

By the way, in the vibration generator of the honing machine according to Japanese Patent No. 3071185, shaft connecting members (universal joints) 106 having two or more bending points are attached to upper and lower ends. Intermediate shaft 10
5 is interposed between the drive shaft 104, which is the output shaft of the drive motor, and the main shaft, and the intermediate shaft is moved in parallel to the drive shaft and the axis of the main shaft to vibrate the intermediate shaft up and down.
Since this vibration is transmitted to the main shaft to vibrate the tool up and down, the two universal joints 106 and 106 and the intermediate shaft 1
05 is indispensable, and there is a problem that the vertical length becomes longer by that amount. In addition, a lateral movement device for reciprocating the intermediate shaft 105 in the horizontal direction at a predetermined cycle, for example, a device in which the eccentric disk 111 is attached to the output shaft of the motor 110 is necessary. Become. Therefore, if such an apparatus is to be assembled into an existing processing machine, a large space is required between the rotating spindle of the processing machine and the workpiece, which causes a practical problem.

On the other hand, the device disclosed in Japanese Patent Publication No. 52-41908 is a device in which a vibration generating device is incorporated in a drill cutting device main body. It is inconvenient for practical use because it is necessary to align the center of the hole after reaming, which is the pre-machining, in order to use it. Therefore, the present invention makes use of the principle of the above-described conventionally known vibration generating mechanism effectively, and can be easily attached to an existing upright drilling machine, machining center, CNC milling machine or the like to apply vibration to a tool, and is compact and robust. It is an object of the present invention to provide an attachment for generating vibration.

[0010]

In order to solve the above problems, the present invention employs the following configuration. That is, the honing vibration attachment according to the present invention is an attachment that is attached to a processing machine having a rotating main spindle, transmits rotation of the main spindle to a processing tool, and imparts axial vibration to the tool. , An input shaft connected to the rotating main shaft of the processing machine, a non-centered joint for eccentrically outputting rotation by a plurality of disks superimposed on each other with a link device performing crank motion therebetween, and two intersections in the universal joint. A hook joint having a structure in which the position of the shaft to be shifted is shifted in the transmission direction, and an output shaft for tool support supported rotatably and axially freely, wherein the output shaft and the input shaft are different from each other in the misalignment joint. And a hook joint.

This attachment has a structure in which a misaligned joint composed of a plurality of discs and a plurality of links arranged between the discs, and a position in which two mutually intersecting shafts of the universal joint are shifted in the transmission direction. It is characterized in that a hook joint is used. As this kind of misaligned joint,
Japanese Patent Publication No. 44-19486 ("torque transmission device"), specifically, for example, "Three Nine Coupling" manufactured by Nippon Piston Ring Co., Ltd.
(SC series) (trade name) can be suitably used. FIG. 2 is an external view showing an example of this misaligned joint. The principle of the misaligned joint will be described later.

This attachment for vibration generation uses a centered joint having a relatively short overall length and a hook joint.
Like an intermediate shaft provided in a honing machine according to Japanese Patent No. 3071185, an intermediate shaft that is connected to a vertical shaft by a pair of universal joints and moves up and down by itself and reciprocates the intermediate shaft at a predetermined cycle. Since a device for lateral movement is not required, it is structurally simple and has a short overall length. In addition, since the misaligned joint has a structure in which a plurality of disks are stacked with a link device interposed therebetween, it is robust and has a short overall length.
For this reason, it is suitable for use in honing and lapping by attaching it to a commercially available machining center, CNC milling machine, upright drilling machine, or the like.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below. FIG. 1 shows an example of an attachment according to the present invention.
Has a machine frame 5 attached to a quill 3 of an upright drilling machine M representing an example of a processing machine, and has an input shaft 7 at an upper end of the machine frame.
Is rotatably supported. The input shaft 7 is connected to an output shaft 8 of the processing machine, and the rotation of the main shaft is transmitted. 9
Numeral denotes a detachable fixing means capable of firmly fixing the machine frame 5 to the processing machine 2. In the illustrated example, a fixing ring 9a which is tightened and fixed to the outer periphery of the quill 3 of the processing machine, and a bolt which tightens the fixing ring 9b, but may be any means capable of firmly attaching the machine frame 5 to the processing machine. Other suitable means, for example, bolts screwed into screw holes provided on the processing machine side Various means, such as those provided with, can be adopted.

At the lower end of the input shaft 7, an input disk 11, which is one end disk of the misaligned joint 10, is fixed. The misaligned joint 10 includes a plurality of (three in the illustrated example) disks, that is, upper and lower end disks 11, 13 and a center disk 12, between the input disk 11 and the center disk 12, and between the center disk 12 and the other end. Link devices 14, 14 comprising three links rotatably supported by bearings are interposed between output disks 13, which are disks.

The principle of operation of the misaligned joint 10 is as follows. That is, FIG. 3 schematically shows the relationship between the end disk and the center disk.
It is assumed that the link and the pin are both rigid and the respective nodes are rotatably connected, and the respective disks are also rotatable. The end disk 11 rotates α degrees about the point O, and A → a,
When moving from B → b, C → c, links AA ′, BB ′,
CC 'becomes aA', bB ', cC', but since the length of the link does not change, A '→ a', B '→ b', C '→
Move to c '.

Considering the quadrilateral OAA'O ', O
Since there is a relationship of A = O'A 'and AA' = OO ', this quadrilateral is a parallelogram. Since AA ′ = aa ′, the quadrangle Oaa′O ′ is also a parallelogram and the angle A
Oa = angle A′O′a ′ = α. This relationship is the same for the other links BB 'and CC'. From the above, it can be seen that the center disk 12 rotates exactly the same as the end disk 11. Center disk 12
And the other end disk 13 is the same. That is, even if the axes 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 center upper surface of the input disk 11 of the misaligned joint 10, and the input shaft 7 is rotatably supported by the machine frame 5 by bearings. The input shaft 7 is connected to the main shaft 8 of the processing machine M by a conventionally known appropriate connecting means. The output disk 13 is provided with an eccentricity adjusting device 20 as a lateral moving device. Eccentricity adjustment device (lateral movement device) 2
Numeral 0 is for moving the output shaft 15 in a direction perpendicular to the axial direction of the output shaft (not for reciprocating vibration), and adjusting and fixing the position of the output shaft in the horizontal direction. And a lateral moving member 23 supported by a slide shaft 22 slidably supported by a frame opposite to the machine frame 5 and provided at a central portion of the lateral moving member. An output shaft 15 fixed to the output disk 13 is rotatably supported by bearings in the circular holes.
The drive side frame 3 of the hook joint 30 is located below the output shaft 15.
1 is fixed.

The above-mentioned hook joint 30 is formed by
The structure is the same as that of the conventionally known structure described in Japanese Patent No. 41908, and as shown in FIG. 4, an intermediate joint 35 is provided between the driving side frame 31 and the driven side frame 32 via coupling pieces 33, 33.
Is attached. The coupling piece 33 is provided with pin holes 33a and 33b perpendicular to each other, and the positions of these two pin holes are shifted by a distance d. As described above, since the positions of the two pin holes in the direction intersecting with each other are shifted, vertical rotation occurs during rotation. This vibration is twice per rotation. In addition, the axial vibration of the hook joint has been reported in detail (Suo, Adachi "Analysis of hook joint giving axial vibration")
Osaka Sangyo University Journal of Natural Sciences 46, 1976 61
Pp. 67).

One of the two pin holes 33a
The pin 3 supported on the driving side frame 31 or the driven side frame 32
4a is inserted, and the connecting piece 33 is swingably supported by the pin. Further, a pin 34b that supports the end of the intermediate joint 35 in a swingable manner is inserted into the other pin hole 33b.

An output shaft 40 is mounted on the driven side frame 32 of the hook joint 30. This output shaft 40 is
The lower end is a tool mounting portion, and a chuck 42 for mounting a tool H such as a horn is mounted thereon.

Next, how to use the attachment 1 will be described. The attachment 1 is used by being attached to a processing machine M that performs processing by rotation of a spindle, for example, an upright drilling machine shown in FIG. For this attachment, the upper part of the machine frame 5 may be fixed to the quill 3 of the processing machine M by fixing means. At the same time, the input shaft 7 of the misaligned joint 10 is connected to the main shaft 8 of the processing machine, and a tool H such as a horn is attached to the chuck 42 provided on the output shaft 40 of the attachment 1. The workpiece W is positioned and fixed below the tool as in the related art.

In this state, the machining machine M is started to rotate the main shaft 8, and the eccentric amount adjusting device 20 controls the misaligned joint 1
The three disks 0 are relatively moved in the horizontal direction by a desired amount. As a result, the rotation of the main shaft 8 is eccentric and the hook joint 3
0 is transmitted to the drive side frame 31. The hook joint 30
The driven side frame 32 is held by the output shaft 40 on the same axis as the axis of the main shaft 8 so as to be vertically movable.
Is shifted from the axis of the main shaft, the intermediate joint 35 is inclined. Therefore, the driven side frame 32 is raised by the amount of the inclination together with the output shaft 40 and the tool. The amplitude of the vertical vibration of the tool is determined by the amount of eccentricity, and the amount of eccentricity can be appropriately adjusted even during operation by the eccentricity adjusting device 20.

As described above, Japanese Patent Publication No. 52-41908 discloses that when the hook joint is rotated with the input side and output side eccentric, the output side is vertically vibrated. It is as follows. Therefore, when the attachment 1 is attached to a processing machine and processed, vertical vibration can be applied to the tool simultaneously with rotation.

Since this attachment only uses a misaligned joint and one hook joint 30 as joints, the overall length (vertical length in the illustrated example) can be shortened. Further, as a device for eccentrically rotating the center of the rotating shaft, a lateral movement device (eccentricity adjusting device) 20 for holding the eccentric position by relatively displacing the disk of the misaligned joint 10 laterally is used, so that the device is robust. Yes, and can transmit rotation accurately. Further, unlike a known honing machine (Japanese Patent No. 3071185), since a universal joint is connected to both sides and there is no intermediate shaft which moves up and down itself, it is structurally simple and compact also in this respect. Can be.

FIG. 5 shows an embodiment different from the above. In this embodiment, an intermediate joint 3 of a hook joint is shown.
5 'has a structure twisted by 90 degrees. By doing so, the number of vibrations per rotation is one. Other parts are the same as the above embodiment.

FIG. 6 shows still another embodiment. In this embodiment, the intermediate joint 3 of the hook joint is used.
The two pins 51 and 52 of the lower joint portion 50 of 5 are orthogonal to each other as in a general universal joint. In this example, the total length is shortened by an amount corresponding to the length d of the displacement of the pin.

FIG. 8 shows a mounting device (holder) 60 for mounting the attachment 1 on a machining center.
Represents an example in which it is mounted via The mounting device 60 connects the input shaft 61 to the rotating shaft of a processing machine (machining center) and transmits the rotation to the input shaft 7 of the attachment 1. The mounting device 60 is prepared by using the mounting device prepared in advance as described above. It is convenient to attach and detach to the device because it can be easily attached and detached.

[0028]

As is evident from the above description, the attachment according to the present invention is a novel one which has never existed in the past, and can be used for an upright drilling machine or the like without any major modification to an existing processing machine. Honing and lapping can be performed using an inexpensive processing machine. In addition to efficiently transmitting the rotation of the main shaft of the processing machine to the tool, the tool itself can be vibrated up and down using this rotation itself. It became suitable for mounting on a machine for processing. Furthermore, since an intermediate shaft that reciprocates up and down and a device that reciprocates the intermediate shaft reciprocally are not required, the structure is compact and robust. Obviously, this attachment can be used for processing other than honing in the illustrated example.

[Brief description of the drawings]

FIG. 1 is a front view illustrating an example of an attachment of the present invention.

FIG. 2 is a perspective view of a misaligned joint.

FIG. 3 is an explanatory view of the operation principle of the misaligned joint.

FIG. 4 is an external view showing a disassembled state of a hook joint.

FIG. 5 is an external view showing a hook joint different from the above.

FIG. 6 is an external view showing still another hook joint.

FIG. 7 is an external view illustrating an example of attachment to a drilling machine.

8A is an external view of an attachment mounting device, and FIG. 8B is an external view of an attachment.

9A and 9B are a structural explanatory view of a conventionally known honing machine and an explanatory view of an operation of an intermediate shaft.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Attachment 5 Machine frame 7 Input shaft 8 Main shaft 10 Misaligned joint 20 Eccentricity adjustment device 30 Hook joint 40 Output shaft 42 Chuck M Processing machine H Tool W Non-workpiece

Claims (3)

[Claims] An attachment which is attached to a processing machine having a rotating main spindle, transmits rotation of the main spindle to a processing tool, and imparts axial vibration to the tool. An input shaft to be connected, a misalignment joint that outputs rotation by eccentricity by a plurality of discs stacked on each other across a link device that performs crank motion, and a transmission direction that indicates the position of two intersecting shafts in the universal joint A hook joint having a displaced structure, and an output shaft for supporting a tool rotatably and axially supported so that the output shaft and the input shaft are connected via the misaligned joint and the hook joint. A vibration attachment for honing characterized by being connected. 2. The honing vibration attachment according to claim 1, further comprising an eccentric amount adjusting means for adjusting an eccentric amount of the misaligned joint. 3. The vibration attachment for honing according to claim 1, wherein the output shaft is supported by a machine frame so as to be concentric with the main shaft of the processing machine.