JP2001121335A - Machining device for constant velocity joint outer ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mainly aim at checking troubles in the later process after accurate and positive deburring, and concurrently at automating a beveling process. SOLUTION: This machining device 10 for an equal velocity joint outer wheel is provided with a carrying mechanism 14 carrying a work 12 made out of a forging product formed out of a cup part 24, and of an axial part 16, a clamping mechanism 18 clamping the axial part of the work 12, a positioning mechanism 20 positioning the work 12 at its specified position, a beveling mechanism 22 beveling both the mouth portion of the cup part 24 and its inner circumferential surface, and with a cleaning mechanism 26 cleaning the wall surface of the cup part 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant velocity joint outer ring machining apparatus capable of chamfering an inner wall surface of an outer cup which is an outer ring of a constant velocity joint.

[0002]

2. Description of the Related Art Conventionally, in a driving force transmitting section of an automobile,
A constant velocity joint that connects one transmission shaft and the other transmission shaft and transmits torque to each axle is used. This kind of constant velocity joint has an outer cup formed with a shaft portion connected to one transmission shaft, and an inner member having a shaft connected to the other transmission shaft and housed inside the cup portion of the outer cup. It is composed of

[0003] In the outer cup, for example, a shaft portion and a cup portion are integrally formed by cold forging, and an inner wall surface of the cup portion has at least three extending in the axial direction.
Two roller grooves are provided through the ridge portion.

[0004]

However, in order to assemble the parts such as the rollers engaged with the guide grooves formed in the cup opening at the opening of the cup, the cup opening is formed at the opening of the cup. A chamfering process for removing burrs is required.

[0005] In this case, if the chamfering is performed manually, the production efficiency is reduced. Therefore, there is a demand for improving the production efficiency by automating the chamfering.

When a high-frequency heating process is applied to a guide groove formed on the inner wall surface of the cup portion in a later step, a short-circuit occurs when a coil portion (not shown) for high-frequency heating comes into contact with the burr or an alarm device. Causes the trouble such as work stoppage to occur.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems and the like. It is an object of the present invention to accurately and surely remove burrs to prevent a trouble from occurring in a later process and to automate chamfering. It is an object of the present invention to provide a constant velocity joint outer ring processing device capable of improving production efficiency.

[0008]

In order to achieve the above-mentioned object, the present invention provides a conveying mechanism for conveying a work, which is a forged product comprising a cup portion and a shaft portion, in three XYZ directions. A clamp mechanism for clamping a shaft portion of the work conveyed by the conveyance mechanism, a positioning mechanism for positioning the work temporarily clamped by the clamp mechanism at a predetermined position, and a mouth portion of a cup portion of the work positioned at the predetermined position And a chamfering mechanism for chamfering the inner peripheral surface, and a cleaning mechanism for cleaning a wall surface of the cup portion.

In this case, the clamp mechanism is disposed at a distance of about 90 degrees along the circumferential direction from the disk member rotatably provided under the driving action of the drive source. A holding station for mounting the shaft portion of the work in the hole of the holding member in a clockwise direction corresponding to each of the four holding members; A processing station for performing chamfering, a cleaning station for cleaning and drying the inner wall surface of the cup portion, and a discharge station for separating the clamped workpiece from the gripping member and transporting the workpiece to the next step. Good.

It is preferable that the chamfering mechanism includes a cutting tool rotatably provided and an NC unit main body for controlling the cutting tool so as to be displaceable along three XYZ axes.

The positioning mechanism has a rod member provided with a tapered surface that slides between a pair of rollers, and a cover surrounding the rod member having a protrusion having a shape corresponding to the guide groove of the cup portion. A protrusion is inserted into at least one guide groove of the cup portion under the driving action of the actuator, and the tapered surface is slidably displaced between the pair of rollers to separate the pair of rollers from each other. Then, when the work enters along the guide groove, the work is positioned at a predetermined position, which is preferable.

The cleaning mechanism includes a block body, a first pipe for discharging air supplied through a first port of the block body toward a center of the cup portion,
A second pipe formed to have a larger diameter than the pipe and discharging the cleaning liquid supplied through the second port of the block from a plurality of small holes, and moving forward and backward through the first pipe and the second pipe. It is preferable to provide an actuator to be operated.

The gripping member holds the shaft of the work in a rotatable temporary clamp state before the work is positioned by the positioning mechanism, and after the work is positioned at a predetermined position by the positioning mechanism, It is preferable to hold the workpiece in a clamped state while preventing rotation of the shaft of the work.

According to the present invention, the loading of the workpiece, the positioning of the workpiece, the cutting of the workpiece, the cleaning of the workpiece, the transport of the workpiece, and the like are sequentially and automatically performed.

As a result, the burrs can be accurately and reliably removed to prevent troubles in the subsequent steps, and the production efficiency can be improved by automating the chamfering.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a processing apparatus for a constant velocity joint outer ring according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 denotes a processing device for a constant velocity joint outer ring (hereinafter simply referred to as a processing device) according to the present embodiment.

The processing apparatus 10 includes a transport mechanism 14 provided so as to be able to transport an outer cup, which is a cold forged workpiece 12, along three XYZ axes, and a workpiece 12 transported by the transport mechanism 14. , A positioning mechanism 20 for positioning the workpiece 12 temporarily clamped by the clamping mechanism 18 at a predetermined position, and chamfering a mouth portion of the workpiece 12 positioned at the predetermined position. A chamfering mechanism 22 for performing the processing, and a cup portion 24 for which the chamfering is performed.
And a cleaning mechanism 26 for discharging chips and the like attached to the inner peripheral surface of the cup portion 24 to the outside by cleaning the inner peripheral surface of the cup portion 24.

The transport mechanism 14 includes a horizontal member 28 supported by a column (not shown) so as to extend in a substantially horizontal direction.
And moves along the axial direction (substantially horizontal direction) of the horizontal member 28 under the driving action of the first motor 30 and along the vertical direction orthogonal to the axis under the driving action of the second motor 32. A pair of pawls 36a, 36 is provided under a driving action of a cylinder (not shown) which is movably provided.
b, and a chuck member 38 for gripping the work 12 by b.

The chuck member 38 is provided movably in the Z-axis direction under the action of a cylinder (not shown) in order to insert the work 12 into the clamp mechanism 18. As a result, the chuck member 38
The work 12 clamped to the first motor 30 and the second motor 30
Under the driving action of the motor 32 and a cylinder (not shown),
It is provided so as to be displaceable along three XYZ axes.

The clamp mechanism 18 includes a disk member 42 provided rotatably along the circumferential direction around the center portion under the driving action of the third motor 40 and a flat portion of the disk member 42. Four are arranged at intervals of approximately 90 degrees in the circumferential direction,
And a holding member 46 for holding the shaft portion 16 of the work 12 inserted through the hole 44. The gripping member 4
6 is described in detail in Japanese Patent Application Laid-Open No.
Reference may be made to JP-A-314221.

In this case, it is preferable to provide a rotating means (not shown) for rotating the work itself in the circumferential direction around the shaft 16 of the work 12 clamped by each gripping member 46 as a center of rotation.

As shown in FIG. 2, the positioning mechanism 20 has a housing 48, a cylinder 50 disposed inside the housing 48, and is displaceable along a substantially horizontal direction under the action of driving the cylinder 50. And a rod member 58 (FIGS. 3 and 4) connected to one end of the piston rod 52 and provided with a tapered surface 56 that slides between a pair of rollers 54a and 54b.
And a cover member 64 having a projection 62 having a shape corresponding to the guide groove 60 of the cup portion 24 and surrounding the rod member 58.

In this case, the piston rod 52 and the rod member 58 are integrally displaced under the driving action of the cylinder 50, and the tapered surface 56 is slidably displaced between the pair of rollers 54a, 54b, whereby the pair of rollers 54a, 54b is displaced. 54a, 54
b are separated from each other and inserted along the guide groove 60. As a result, the protrusions 62 and the like are inserted into the guide grooves 60 located on the lower side of the cup portion 24, and the work 12 is positioned at a predetermined position.

The rod member 58 is connected to the spring member 6.
6 is in a state of being urged in a direction away from the work 12 by the elastic force of 6. Further, at least one protrusion 62 is provided so as to be inserted into the guide groove 60 located on the lower side of the cup portion 24, but is not limited to this, and corresponds to the number of guide grooves 60. Alternatively, a plurality may be provided. Furthermore, by removing the fastening pin 68 and replacing it with another cover member or the like (not shown), it is possible to correspond to another outer cup having a different width or the like of the guide groove 60.

As shown in FIG. 1, the chamfering mechanism 22 is provided with an NC rotatably mounted with a cutting tool 70 for chamfering a mouth portion of the cup portion 24 or the like under a cutting fluid supply operation. A unit main body 72 and fourth to sixth motors 76 for respectively displacing the NC unit main body 72 in the XYZ three-axis directions under the guiding action of a guide member 74.
a to 76c. The NC unit main body 72 is provided with a spindle motor 78 for rotating the cutting tool 70, and the rotational motion of the spindle motor 78 is transmitted to the cutting tool 70 via a driving force transmitting means (not shown).

The cleaning mechanism 26, as shown in FIG.
A cylinder 82 fixed to a base plate 80, a shaft 86 coaxially connected to one end of a piston rod 84 of the cylinder 82, a guide block 88 for supporting the shaft 86 in a freely insertable manner,
And a block body 90 which is displaced along a substantially horizontal direction under the driving action of the cylinder 82.

Further, as shown in FIG. 6, the cleaning mechanism 26 is mounted on the block body 90, and a cover member 92 surrounding the work 12 and a first member of the block body 90 are provided.
A first pipe 96 for discharging the air supplied through the port 94 toward the center of the cup portion 24; and a second port 96 of the block body 90 formed to have a larger diameter than the first pipe 96. The cleaning liquid supplied through the plurality of holes 1
And a second pipe 102 that discharges from 00. The cover member 92 has a function of preventing scattering of the cleaning liquid, cutting powder, and the like.

In this case, the first tube 96 and the second tube 1
02, a double pipe is substantially formed, and it is preferable to use the same cleaning liquid as the cleaning liquid used in the cleaning mechanism 26 when the chamfering is performed by the cutting tool 70. .

As shown in FIG. 1, a table 104 is provided on which a plurality of cold forged workpieces 12 are placed in a row, and a transport mechanism 14 is placed on the table 104. It is assumed that each of the placed works 12 is gripped and carried into the processing apparatus 10.

The processing apparatus 10 for a constant velocity joint outer ring according to the embodiment of the present invention is basically configured as described above. Next, the operation and effect of the apparatus will be described.

First, the workpiece 12 placed on the table 104 is gripped by the chuck member 38 of the transport mechanism 14, and the chuck member 38 is driven by the first motor 30, the second motor 32 and a cylinder (not shown). XYZ
By displacing in the three axial directions, the shaft portion 16 of the work 12 is mounted in the hole portion 44 of the gripping member 46. At this time, it is assumed that the shaft portion 16 of the work 12 is in a state of being temporarily clamped by the gripping member 46.

Subsequently, the cylinder 50 of the positioning mechanism 20
Is driven, and the rod member 58 is displaced integrally and substantially horizontally toward the workpiece 12 so that the protrusion 62 formed on the cover member 64 is moved into the guide groove 60 located below the cup portion 24. enter in. At that time, the rod member 5
8 is slidably displaced between the pair of rollers 54a, 54b by the tapered surface 56 of the pair of rollers 54a, 54b.
b is displaced in the direction in which the pair of rollers 54a,
4b enters the guide groove 60 while rotating along the guide groove 60 on the lower side of the cup portion 24.
Is positioned at a predetermined position. The work 12 positioned at the predetermined position is securely clamped by the gripping member 46 of the clamp mechanism 18.

Next, the disk member 42 is rotated by a predetermined angle along the circumferential direction about the center portion as the center of rotation under the driving action of the third motor 40, so that the workpiece 12 clamped by the gripping member 46 is rotated. The cup 24 and the cutting tool 70 of the chamfering mechanism 22 are opposed to each other. In the chamfering mechanism 22, the cutting tool 70 is rotated under the driving action of the spindle motor 78, and the fourth to sixth motors 76a to 76
The NC unit main body 72 is displaced in the X, Y, and Z axes directions under the driving action of c to perform chamfering on the inner peripheral portion of the cup portion 24 and the like. In the pre-process,
A first chamfered surface 108, which is a boundary portion between the bulging portion 106 bulging between the adjacent guide grooves 60 and one end surface of the cup portion 24, and the first chamfered surface 108 facing the bottom of the cup portion 24, by a processing device (not shown). It is assumed that the second chamfered surface 110 that is continuous with the one chamfered surface 108 has already been chamfered.

That is, the chamfering performed by the chamfering mechanism 22 is, as shown in FIGS.
A cup-shaped base chamfering surface 112 formed of a boundary between one end surface of the cup portion 24 and the guide groove 60 and formed in a U-shape along the shape of the guide groove 60 and the bulging portion 106; An inner peripheral side chamfered surface 113 which is continuous with the surface 112 and is formed to be curved along the edges of the first and second chamfered surfaces 108 and 110.

As described above, the chamfering process is performed on the cup opening chamfering surface 112 and the inner peripheral chamfering surface 113 under the rotating action of the cutting tool 70 provided on the NC unit main body 72, so that the accuracy is improved. Burrs are reliably removed. When the chamfering process is performed by the cutting tool 70, the cutting fluid is naturally discharged to the processing site by a cutting fluid supply unit (not shown).

After the chamfering is performed by the chamfering mechanism 22, the disk member 42 is rotated by a predetermined angle along the circumferential direction about the center portion under the driving action of the third motor 40. The work 12 faces the cleaning mechanism 26.

In the cleaning mechanism 26, the cover member 92 and the block body 90 are moved under the driving action of the cylinder 82.
The first tube 96 is displaced integrally in the direction approaching the second side.
The displacement of the second pipe 102 is stopped at a predetermined position facing the inside of the cup portion 24 (see FIG. 6).

Therefore, the cleaning liquid introduced through the second port 98 is discharged from the plurality of holes 100 of the second pipe 102 to form a cup including the cup portion chamfered surface 112 and the inner peripheral chamfered surface 113. After cleaning the inner peripheral surface of the portion 24 with a cleaning liquid, the cleaning surface is dried by discharging air introduced through the first port 94 from the first tube 96 toward the substantially central portion of the cup portion 24. Can be done. After the air discharged from the first tube 96 collides with a substantially central portion of the cup portion 24, as shown by an arrow in FIG. 6, the air flows between the mouth portion of the cup portion 24 and the second tube 102. It passes and is discharged outside.

As a result, chips, dust and the like generated by the chamfering process are discharged from the inner peripheral surface of the cup portion 24 to the outside.

Note that the cleaning step of discharging the cleaning liquid toward the inner peripheral surface of the cup portion 24 and the drying step by air blowing may be performed continuously and repeatedly.

After the washing step and the drying step are completed, the disk 12 is rotated by a predetermined angle along the circumferential direction around the central portion under the driving action of the third motor 40 so that the workpiece 12 is rotated. It will be in the state located on the upper side of the disk member 42. After releasing the clamped state, the work 12 is gripped by the chuck member 38 of the transfer mechanism 14 and transferred to the next step.

In the clamp mechanism 18, the workpiece 1 is rotated clockwise, corresponding to the four gripping members 46, respectively.
A loading station for mounting the second shaft portion 16 in the hole portion 44 of the gripping member 46, a processing station for chamfering the mouth portion of the work 12 and the like, and cleaning and drying for the inner wall surface of the cup portion 24. A washing station to perform;
There is a discharge station that separates the workpiece 12 from which the clamped state is released from the gripping member 46 and transports the workpiece 12 to the next step, and automation is achieved by making the four stations rotate around and continuously at substantially the same time.

In the present embodiment, a transport mechanism 14 for transporting the work 12 along three directions of XYZ, a clamp mechanism 18 for clamping the shaft 16 of the work 12 transported by the transport mechanism 14, A positioning mechanism 20 for positioning the workpiece 12 temporarily clamped by the clamp mechanism 18 at a predetermined position, a chamfering mechanism 22 for performing a chamfering process on a mouth portion and the like of the workpiece 12 positioned at a predetermined position, and a chamfering process. Cup part 24
By providing the cleaning mechanism 26 for cleaning the inner peripheral surface of the substrate, the chamfering process can be automated and the production efficiency can be improved. Therefore, by removing the burrs on the inner peripheral surface of the cup portion 24 accurately and reliably, it is possible to prevent a trouble from occurring in a later step.

Although the present embodiment has been described using a tripod type outer cup, the present invention is not limited to this. As shown in FIG. Of course, chamfering can be performed.

[0046]

According to the present invention, the following effects can be obtained.

That is, a transport mechanism for transporting a workpiece along the X-axis and Y-axis directions, a clamp mechanism for clamping a shaft portion of the workpiece transported by the transport mechanism, and a workpiece temporarily clamped by the clamp mechanism. A positioning mechanism for positioning at a predetermined position, a chamfering mechanism for performing a chamfering process on a mouth portion or the like of a work positioned at a predetermined position, and a cleaning mechanism for cleaning an inner peripheral surface of the chamfered cup portion. The production efficiency can be improved by automating the chamfering process by providing.

Accordingly, it is possible to prevent the occurrence of troubles in a later step by removing the burrs on the inner peripheral surface of the cup portion accurately and reliably.

[Brief description of the drawings]

FIG. 1 is a schematic configuration perspective view of a processing device for a constant velocity joint outer ring according to an embodiment of the present invention.

FIG. 2 is a partially cutaway sectional view of a positioning mechanism constituting the processing apparatus for a constant velocity joint outer ring.

FIG. 3 is a longitudinal sectional view showing a state in which a protrusion and a pair of rollers constituting the positioning mechanism have entered a guide groove of a cup part.

FIG. 4 is a transverse sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a partial cross-sectional configuration diagram of a cleaning mechanism constituting the processing device for a constant velocity joint outer ring.

FIG. 6 is an enlarged vertical sectional configuration view of the cleaning mechanism.

FIG. 7 is a perspective view of a workpiece showing a chamfered surface of a cup portion to be chamfered;

8 is a view as seen from the direction of arrow A in FIG. 7;

FIG. 9 is a longitudinal sectional view taken along line IX-IX of FIG. 8;

FIG. 10 is a perspective view showing a chamfered surface of a bar field type outer cup.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Constant-velocity joint outer ring processing apparatus 12 ... Work 14 ... Transport mechanism 16 ... Shaft part 18 ... Clamping mechanism 20 ... Positioning mechanism 22 ... Chamfering processing mechanism 24 ... Cup part 26 ... Cleaning mechanism 28 ... Horizontal member 30, 32, 40, 76a to 76c, 78: motor 38: chuck member 42: disk member 46: gripping member 54a, 54b
... Roller 56 ... Tapered surface 58 ... Rod member 60 ... Guide groove 94,98 ... Port 96,102 ... Tube 112 ... Chamfered chamfer at the base of cup part 113 ... Chamfered surface at inner circumference

Claims (6)

[Claims] 1. A transport mechanism for transporting a work, which is a forged product comprising a cup portion and a shaft portion, in three XYZ directions, a clamp mechanism for clamping a shaft portion of the work transported by the transport mechanism. A positioning mechanism for positioning a workpiece temporarily clamped by the clamp mechanism at a predetermined position; a chamfering mechanism for performing a chamfering process on a mouth portion and an inner peripheral surface of a cup portion of the workpiece positioned at the predetermined position; A processing device for a constant velocity joint outer ring, comprising: a cleaning mechanism for cleaning a wall surface of a cup portion. 2. The apparatus according to claim 1, wherein said clamp mechanism comprises: a disk member rotatably provided under the driving action of a driving source; and approximately 90 degrees circumferentially around said disk member. And four gripping members arranged at a distance from each other, and corresponding to the four gripping members, each clockwise,
A loading station for mounting the shaft portion of the work in the hole of the gripping member, a processing station for performing chamfering on a mouth portion of the work, and a cleaning station for cleaning and drying the inner wall surface of the cup portion, A processing device for a constant velocity joint outer ring, comprising: a discharge station that separates a workpiece in which a clamped state is released from a gripping member and transports the workpiece to a next step. 3. The apparatus according to claim 1, wherein the chamfering mechanism comprises: a cutting tool rotatably provided; and an NC unit main body for controlling the cutting tool to be displaceable along three XYZ axes. A processing apparatus for a constant velocity joint outer ring, comprising: 4. The apparatus according to claim 1, wherein the positioning mechanism has a rod member provided with a tapered surface that slides between a pair of rollers, and a protrusion having a shape corresponding to a guide groove of a cup part. And a cover member surrounding the rod member, wherein at least one of the cup portions is driven by an actuator.
The protrusions are inserted into the two guide grooves, and the tapered surface is slidably displaced between the pair of rollers so that the pair of rollers are separated from each other and enter along the guide grooves, so that the workpiece is positioned at a predetermined position. A processing device for a constant velocity joint outer ring, characterized in that the processing device is positioned at a predetermined position. 5. The apparatus according to claim 1, wherein the cleaning mechanism includes a block body and a first body of the block body.
A first pipe for discharging air supplied through the port toward the center of the cup portion, and a first pipe formed to have a larger diameter than the first pipe and supplied through a second port of the block body. A constant velocity joint outer ring processing device, comprising: a second pipe for discharging the cleaning liquid from a plurality of small holes; and an actuator for moving the first and second pipes forward and backward. 6. The apparatus according to claim 2, wherein the gripping member holds a shaft portion of the work in a rotatable temporary clamp state before the work is positioned by the positioning mechanism, and the work is held by the positioning mechanism. A constant velocity joint outer ring processing apparatus, characterized in that after being positioned at a predetermined position, rotation of a shaft portion of a work is prevented and the workpiece is held in a clamped state.