JPH08294832A - Cam shaft assembling machine - Google Patents

Abstract

PURPOSE: To restrain positioning work and conveying work of a shaft and cams to minimum manhours, and improve work accuracy and productivity of a cam shaft by manufacturing the cam shaft by a series of operation. CONSTITUTION: A piece clamp 51 of a cam carrying mechanism 50 is advanced in a shaft 5 retreated condition, and the cam shaft 5 is advanced, and while inserting the shaft 5 into a shaft hole of a cam 24 held by the piece clamp 51, a knurling eye is formed in a shaft directional prescribed position of the shaft 5 by a knurling work means 40. Afterwards, the shaft 5 is rotated up to a prescribed phase angle by a motor 17 for a chuck, and the shaft 5 is pushed out by a press-in motor 10, and is pressed in and fitted to a cam 21, and work of a protrusive part and press-in and fitting of the cams are repeated, and the cams dislocated by a prescribed phase angle are pressed/fitted by two or more pieces in/to a prescribed position of the shaft 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camshaft assembling machine for producing a camshaft by press-fitting two or more cams displaced by a predetermined phase angle at predetermined positions on the shaft.

[0002]

2. Description of the Related Art In a camshaft used for an engine of an automobile, a plurality of cams displaced by a predetermined phase angle and a shaft press-fitted into the shaft holes of these cams are joined and integrated. It is made by doing so. These cams and shafts are knurled to form a ridge at the cam attachment position on the shaft so that the cam and shaft remain integrated even when the camshaft transmits a large torque. The knurled surface is brought into close contact with the shaft hole of the cam.

Therefore, conventionally, when a camshaft is manufactured, the shaft is mounted on a knurling device, the shaft is rotated while fixing both ends of the shaft to perform the knurling, and then the knurling is performed. After the shaft is attached to the press-fitting device and the phase angle of the cam is set, the shaft is press-fitted into the shaft hole of the cam and stopped at the cam mounting position.

[0004]

However, in the above-mentioned conventional method, it is necessary to perform independent processing at least by the knurling device and the press-fitting device when manufacturing the camshaft. Therefore, in each device, the positioning work of the shaft and the cam and the like are required, and the transfer work between the devices is required. As a result, the machining accuracy of the cam shaft is lowered and the productivity is lowered. .

Therefore, the present invention is intended to provide a camshaft assembling machine capable of improving machining accuracy and productivity by producing a camshaft by a series of operations.

[0006]

In order to solve the above-mentioned problems, a protrusion is formed at a predetermined position in the axial direction of the shaft with respect to the shaft circumferential surface, and a shaft hole of a cam is press-fitted into the protrusion.
The cam is for manufacturing a cam shaft which is displaced by a predetermined phase angle and press-fitted to fit two or more, and has the following features.

That is, the camshaft assembling machine is provided with a shaft holding means for detachably holding one end of the shaft, and is provided with a raised portion processing means and a cam holding means for holding the cam on the other end side of the shaft so as to be movable back and forth. The shaft holding means rotates so as to face a predetermined position in the axial direction of the shaft with respect to the raised portion processing means, and further allows the shaft to advance and retreat so that the shaft can be pushed into the cam holding means at a predetermined phase angle. Means and shaft rotating means. Then, the cam holding means is advanced in a state where the shaft is retracted by the shaft advancing / retreating means, and the shaft is advanced by the shaft advancing / retreating means,
While the shaft is inserted through the shaft hole of the cam held by the cam holding means, the raised portion processing means processes the raised portion at a predetermined position in the shaft axial direction, and then the raised portion processing means is retracted, and the shaft rotating means is used. By rotating the shaft to a predetermined phase angle, pushing the shaft out by the shaft advancing / retreating means, press-fitting it into the cam, and repeating ridge processing and cam press-fitting, the shaft is displaced by a predetermined phase angle. It is characterized in that two or more cams are press-fitted and fitted.

It is desirable that the shaft holding means, the raised portion processing means, and the cam holding means are arranged vertically. Further, it is desirable that two sets of the cam holding means are alternately switched. Further, it is desirable that the raised portion processing means be provided with a distance sensor that measures the degree of the raised portion.

[0009]

According to the above construction, since the camshaft can be manufactured by a series of operations, the independent knurling device and the press-fitting device, which are conventionally required, are not necessary. . Therefore, the number of man-hours required for positioning the shaft and the cam is minimized, and the work required for carrying between the devices is eliminated, so that the processing accuracy and productivity of the cam shaft can be improved. Further, since the raised portion is machined and the cam is press-fitted in a cantilevered state in which one end of the shaft is held, the configuration of the camshaft assembling machine can be simplified.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The camshaft assembling machine according to this embodiment is shown in FIG.
As shown in FIG. 2, an assembling machine body 1 for assembling the cam shaft 6, and a cam supply unit 2 provided on the front side (right side in the figure) of the assembling machine body 1 for supplying a cam 21 to the assembling machine body 1. Provided on one of the back side (left side in the figure) of the assembly machine body 1 and provided on the other side of the back side of the assembly machine body 1 and the shaft supply portion 3 for supplying the shaft 5 to the assembly machine body 1.
The camshaft unloading unit 4 is provided for unloading the camshaft 6 from the assembly machine body 1.

As shown in FIG. 3, the above-described assembly machine body 1 has a pedestal 7 fixed to the ground, post members 8.8 vertically provided at both ends of the pedestal 7, and both post members 8.8. And a horizontal member 9 horizontally provided at the upper end of the. A press-fitting motor 10 is provided at the center of the lateral member 9 so that the rotary shaft is located above the lateral member 9, and a drive gear 12 is provided on the rotary shaft of the press-fitting motor 10. . The drive gear 12 is connected to the large diameter driven gear 1 via the small diameter driven gear 11a.
1b are meshed with each other, and the small-diameter driven gear 11a and the large-diameter driven gear 11b are provided in a pair on the left and right from the center of the lateral member 9.

At the center of rotation of the large-diameter driven gears 11b and 11b, the screw shaft 1 which is erected vertically is provided.
The upper ends of the screws 3 and 13 are fixed, and the screw shafts 13 and 13 are rotatably supported by the upper surface of the pedestal 7 after rotatably passing through the lateral member 9. . Screw members 14 and 14 are screwed to these screw shafts 13 and 13, and both screw members 14 and 1
A chuck support member 15 is laterally provided at 4. Slide blocks 37, 37 are provided at both ends of the chuck support member 15, and these slide blocks 37, 37 are movably mounted on slide rails 38, 38 fixed to the post members 8.8. Engaged. Thereby, when the screw shafts 13 are rotated by the press-fitting motor 10, the chuck support member 15 is
When the screw members 14, 14 move with the rotation of the screw shafts 13, 13, the slide rail 3
It is designed to go up and down along 8/38.

A shaft chuck mechanism 16 is provided at the center of the chuck support member 15. The shaft chuck mechanism 16 has a chuck 18 capable of holding the upper end of the shaft 5, and a chuck motor 17 connected to the chuck 18 via a gear 39.
Then, the chuck motor 17 rotates the chuck 18 to knurl the shaft 5 held by the chuck 18, and stops the chuck 18 at a predetermined angle. The first to sixth press-fitting angles (phase angles) with respect to the cam 21 of the shaft 5 held by 18 are set.

In the frame 7 located below the chuck 18, an elevating rod 19 that ascends and descends in the direction of the chuck 18 is provided.
The shaft pushing-up mechanism 19 including the shaft a is provided. When the shaft pushing-up mechanism 19 mounts the shaft 5 on the chuck 18, the shaft pushing-up mechanism 19 contacts the lower end of the shaft 5 with the tip of the lifting rod 19a. The chuck 1
It is designed to be press-fitted in 8.

In the assembly machine main body 1, the shaft 5 held at the chuck 18 has a loading / unloading position, a knurling position, and a cam press-fitting position on the moving path of the shaft 5.
It recognizes from the lower end side in this order. That is, the assembly machine body 1 recognizes the carry-in / carry-out position as a position where the shaft 5 is carried in from the shaft supply unit 3 and the cam shaft 6 is carried out to the cam shaft carry-out unit 4, and the knurled position is a position where knurling is performed. The machining position is recognized, and the cam press-fitting position is recognized as the position where the knurled shaft 5 is press-fitted into the cam 21.

The above knurling position is set as the processing position of the knurling mechanism 40 provided on the back side of the assembly machine body 1 as shown in FIG. The knurling mechanism 40 is provided on the gantry 7 of the assembly machine body 1, and as shown in FIG. 5, the knurling mechanism 45 is provided so as to move back and forth in the horizontal direction, and the knurling mechanism for horizontally moving the knurling mechanism 45. It has a moving mechanism 46 and a distance sensor (not shown) that detects a raised state of knurled eyes formed by knurling. still,
The above distance sensor may be a contact type distance sensor that makes contact with the knurled surface for measurement, or a non-contact type distance sensor that irradiates the knurled surface with laser light or the like for measurement. good.

The knurl forming mechanism 45 has a pair of knurls 41, 41 for forming knurls on the side peripheral surface of the shaft 5, and knurl holders 42, 42 for holding these knurls 41, 41, respectively. ing. These knurl holders 42, 42 are provided at one end of the holder support members 43, 43, respectively.
The holder support members 43, 43 are rotatably supported at their center portions and opened and closed by the opening / closing cylinder 44 at the other end portions. Then, the knurling mechanism 45 is configured so that the knurling holder 4
The two are opened, and the knurl holders 42, 42 are closed during the knurling process.

On the other hand, the knurling moving mechanism 46 supports the knurling mechanism 45 and slide rails 49, 49.
It has a knurl table 47 placed on it and a knurl moving cylinder 48 for moving the knurl table 47 forward and backward along the slide rails 49, 49, and knurling on the shaft advancing orbit in the assembly machine body 1. The knurling mechanism 45 is moved back and forth between the position and the standby position outside the assembly machine body 1.

The cam press-fitting position is set as the processing position of the cam holding mechanism 50 provided on the upper surface of the gantry 7, as shown in FIG. The cam holding mechanism 50 is shown in FIG.
As shown in FIG. 5, the pair of left and right piece clamps 51, 51 are provided between the post members 8, 8 and the piece clamps 51, 51 hold the cam 21 via the piece holder 54. ing. These piece clamps 51, 51 are provided on a piece table 52 having a through hole formed in the center thereof.
Are provided so as to be able to move back and forth on the slide rails 53, 53 that are provided side by side with the shaft advancing path sandwiched therebetween.

A shuttle cylinder 55 is connected to the piece table 52. Shuttle cylinder 55
Is configured to move the piece table 52 forward and backward in the horizontal direction along the slide rail 53, and to move the cam 21 held by the one piece clamp 51 to the shaft press-fitting position on the shaft advancing orbit for knurling. After performing the working process and the cam press-fitting fitting process, when performing the next knurling process and the cam press-fitting fitting process, the other piece clamp 51 is switched to.

Further, the piece holder 54 held by the piece clamp 51 is conveyed between the piece clamps 51 and 51 and the cam supply section 2 by a holder conveying mechanism (not shown). The cam supply unit 2 includes six systems of cam replenishment units 2a ... Which match the number of cams 21 attached to the shaft 5, and the cam replenishment units 2a ... When the empty piece holder 54 is conveyed. The cam 21 is supplied to the piece holder 54. Then, the holder transport mechanism pulls out the empty piece holder 54 from the other piece clamp 51 while performing the cam press-fitting fitting process and the knurling process on the one piece clamp 51, and replenishes a predetermined cam. After being conveyed to the portion 2a, the piece holder 54 to which the cam 21 to be processed next is attached is conveyed from the other cam supply position 2a to the other piece clamp 51.

The carry-in / carry-out position is set as a processing position for the shaft supply unit 3 and the camshaft carry-out unit 4, as shown in FIG. As shown in FIG. 1, the shaft supply unit 3 includes a shaft conveyor 26 that sequentially conveys the shaft 5, a push-up mechanism (not shown) that pushes the shaft 5 that has been conveyed to a predetermined position of the shaft conveyor 26 to a holding position, and a holding position. And a shaft transport mechanism 22 for moving the shaft 5 to a loading / unloading position in the assembly machine body 1. The shaft transport mechanism 22 includes a shaft holding mechanism 23 that holds the shaft 5 and a shaft holding mechanism 2.
The shaft rotation mechanism 24 for rotating the shaft 5 held by the shaft 3 from the horizontal direction to the vertical direction, and the shaft 5 held by the shaft holding mechanism 23.
And a shaft moving mechanism 25 for moving from the holding position to the loading / unloading position in the assembly machine body 1.

On the other hand, as shown in FIG. 2, the camshaft carry-out section 4 carries the camshaft conveyor 28 for carrying out the camshaft 6 and the camshaft 6 produced by the assembly machine body 1 to the camshaft conveyor 28. And a camshaft transport mechanism 27 that operates. That is, the camshaft transport mechanism 27 described above includes a camshaft holding mechanism 29 that holds the camshaft 6 and a camshaft rotation mechanism that rotates the camshaft 6 held by the camshaft holding mechanism 29 from the vertical direction to the horizontal direction. It has a mechanism 30 and a camshaft moving mechanism 31 for moving the camshaft 6 held by the camshaft holding mechanism 29 from the carry-in / carry-out position in the assembly machine body 1 to the open position of the camshaft carry-out section 4.

The operation of the camshaft assembling machine having the above structure will be described. First, as shown in FIG. 1, the shaft 5 conveyed to a predetermined position on the shaft conveyor 26.
Will be conveyed to the holding position by a push-up mechanism (not shown). Then, when the shaft transport mechanism 22 is operated, the shaft 5 existing in the holding position is held by the shaft holding mechanism 23, and is rotated from the horizontal direction to the vertical direction by the shaft rotating mechanism 24, and then the shaft moving mechanism. By 25, it is moved to the carry-in / carry-out position on the shaft advance track in the assembly machine body 1.

When the shaft transfer mechanism 22 is operated, as shown in FIG. 4, the first cam 21 attached to the uppermost part of the shaft 5 is moved from the cam supply section 2 by a holder transfer mechanism (not shown). Will be conveyed to the piece clamp 51. Then, the shuttle cylinder 55 is arranged so that the shaft hole of the cam 21 held by the one piece clamp 51 is located on the shaft advancing orbit.
Will be moved by.

Next, as shown in FIG.
When the shaft chuck mechanism 16 is rotated,
Is lowered, and the chuck 18 of the shaft chuck mechanism 16 is moved.
Holds the upper end of the shaft 5. The lowering of the shaft chuck mechanism 16 is continued until the lower limit position is reached, and the shaft 5 held by the chuck 18 is lowered by the cam 21 of the piece clamp 51.
The lower end reaches the shaft lifting mechanism 19 after passing through the shaft hole. Then, the shaft push-up mechanism 19 advances the lifting rod 19a to move the lifting rod 19a.
The shaft 5 abutted on a is pushed into the chuck 18 and fixed. After that, the shaft chuck mechanism 16 is lifted to move the first chuck 1 located at the top of the shaft 5.
The shaft 5 is positioned so that the second cam attachment position is the knurling position.

Next, the knurling mechanism 40 is operated, and the knurling process is performed on the first cam mounting position of the shaft 5. That is, as shown in FIG. 5, the knurl forming mechanism 45 causes the knurl holder 4 to move.
The knurling cylinder 48 moves the shafts 2 and 42 in the direction of the shaft 5 while expanding the space between the shafts 2 and 42 larger than the diameter of the shaft 5. Then, when the knurling mechanism 45 reaches the knurling position on the shaft advancing orbit, the knurling holders 42, 42 are closed and the shaft 5 is clamped by the knurls 41, 41. After that, as shown in FIG. 3, the chuck motor 17 is rotated to rotate the shaft 5 held by the chuck 18, so that knurls are formed on the peripheral surface of the shaft 5 at the first cam attachment position. Will be formed.

During the knurling process, as shown in FIG. 4, the second cam 21 is transferred from the cam supply unit 2 to the other piece clamp 51 by the holder transfer mechanism (not shown). The cam 21 to be handled next is prepared.

The raised state of the knurled eye is detected by a distance sensor (not shown) of the knurling mechanism 40 as shown in FIG. 5, and when it is determined that the desired raised state is obtained, the state shown in FIG. The rotation of the chuck motor 17 is stopped, and the knurling process is ended. Then, when the knurl holders 42, 42 are opened and the knurl moving cylinder 48 retracts the knurl forming mechanism 45 to a predetermined standby position, the cam press-fit fitting process is subsequently performed.

That is, as shown in FIG. 1, the chuck motor 17 rotates and the shaft 5 held by the chuck 18 is rotated.
Is set to a predetermined angle, and then the chuck 18 is lowered to press the shaft 5 into the cam 21 at the first press-fitting angle (phase angle), so that the knurled surface of the shaft 5 becomes the cam 21. Will be press-fitted into the shaft hole.

After that, the piece clamp 51 of the cam holding mechanism 50 is opened, and the holding of the cam 21 by the piece holder 54 of FIG. 4 is released. Then, as the chuck 18 is lifted, the shaft 5 is moved to the cam 2
1, when the lower end of the shaft 5 reaches above the cam press-fitting position, the piece clamp 51 in the empty state is switched to the other piece clamp 51 holding the second cam 21. Become. As a result, the waiting time for preparing the next cam 21 is extremely reduced. After that, the knurling process and the cam press-fitting process are performed by the same operation as that described above, so that a knurled eye is formed at the second cam attachment position of the shaft 5 and the second cam 21. Is the shaft 5 with the second press-fitting angle (phase angle).
It will be press-fitted into.

When the knurling process and the cam press-fitting process are repeated and all the cams 21 are attached to the shaft 5 and the manufacture of the cam shaft 6 is completed, the cam shaft 6 is moved up and down by moving the chuck 18 up and down. Will be positioned in position. Then, as shown in FIG. 2, the camshaft transport mechanism 27 is operated, and the camshaft holding mechanism 29 holds the camshaft 6 at the loading / unloading position. After that, the camshaft 6 is moved toward the camshaft conveyor 28 and rotated from the vertical direction to the horizontal direction, and then the camshaft conveyor 28 is rotated.
Will be carried outside.

As described above, the camshaft assembling machine according to the present embodiment has a ridge portion (knurled surface) with respect to the shaft circumferential surface formed at a predetermined position in the axial direction of the shaft 5 by the following structure, and the ridge portion is cammed. Two or more cams 2 displaced by a predetermined phase angle by being press-fitted into the shaft hole 21
The cam shaft 6 in which the shaft 5 is press-fitted into 1 is manufactured.

That is, as shown in FIG. 1, the camshaft assembling machine is provided with a shaft holding means (chuck 18) for detachably holding one end of the shaft 5 and a reciprocating movement on the other end side of the shaft 5. Raised part processing means (knurling mechanism 40) and cam holding means (piece clamp 51)
It is possible to rotate the shaft 5 so as to face a predetermined position in the axial direction of the shaft with respect to the raised portion processing means, and further push the shaft 5 into the cam holding means at a predetermined phase angle (press-fitting angle with respect to the cam 21). As described above, the shaft advancing / retreating means (press-fit motor 1
0, screw shaft 13, etc.) and shaft rotating means (chuck motor 17, gear 39). Then, the cam holding means is advanced while the shaft 5 is retracted by the shaft advancing / retreating means, the shaft 5 is advanced by the shaft advancing / retreating means, and the shaft 5 is inserted into the shaft hole of the cam 21 held by the cam holding means. After processing the raised portion at a predetermined position in the axial direction of the shaft 5 by the raised portion processing means, the raised portion processing means is retracted, the shaft 5 is rotated by the shaft rotating means to a predetermined phase angle, and the shaft 5 is moved by the shaft advancing / retracting means. Is pushed out to be fitted into the cam 21 by press fitting, and by repeating such a raised portion processing (knurling processing) and cam press fitting, the shaft 5 is shifted to a predetermined position by a predetermined phase angle. Two or more cams 21 are press-fitted into each other.

As a result, in the camshaft assembly machine, the camshaft 6 can be manufactured by a series of operations, so that independent processing by the conventional knurling machine and press-fitting machine is unnecessary. Has become. Therefore, the positioning work of the shaft 5 and the cam 21 is a minimum man-hour, and the transfer work between the devices is not required, so that the processing accuracy and productivity of the cam shaft 6 can be improved. ing. Furthermore, shaft 5
Since the raised portion is processed and the cam is press-fitted in a cantilevered state with one end held, it is possible to simplify the configuration of the camshaft assembly machine.

Further, the camshaft assembling machine of this embodiment is
Since the shaft holding means, the raised portion processing means, and the cam holding means are arranged in the vertical direction, it is possible to further improve the processing accuracy when processing one end of the shaft 5 in a cantilever state. Has become. Further, by arranging the above means in the vertical direction, various carrying-out devices such as the cam supply unit 2, the shaft supply unit 3, and the cam shaft unloading unit 4 are installed on the front and back sides of these units. It is also possible to improve the degree of freedom in designing the camshaft assembly machine.

Further, the camshaft assembling machine of this embodiment is
Since the two sets of cam holding means are alternately switched, it is possible to shorten the waiting time when the cams are prepared by the cam holding means and improve the productivity.

Further, the camshaft assembling machine of this embodiment is
Since the protruding portion processing means is provided with the distance sensor for measuring the degree of the protruding portion, the protruding portion can be processed into an optimum state and press-fitted to the cam 21, and as a result, the camshaft 6 can be fitted. It is possible to improve quality.

[0039]

As described above, according to the present invention, the cam holding means is advanced while the shaft is retracted by the shaft advancing / retreating means, the shaft is advanced by the shaft advancing / retreating means, and the cam held by the cam holding means is moved. While inserting the shaft through the shaft hole, after processing the ridge at a predetermined position in the axial direction of the shaft by the ridge processing means, retract the ridge processing means, rotate the shaft to a predetermined phase angle by the shaft rotating means, and move the shaft forward and backward. The shaft is pushed out by the means to be press-fitted into the cam, and the protrusion processing and the cam press-fitting are repeated, so that two or more cams displaced by a predetermined phase angle to the predetermined position of the shaft are press-fitted. Because of the structure, the camshaft can be manufactured by a series of operations.

This eliminates the need for independent processing by the conventional knurling machine and press-fitting machine, and minimizes the number of man-hours required for positioning the shaft and cam, as well as carrying work between machines. Since it is not necessary, it is possible to improve the processing accuracy and productivity of the cam shaft. Further, since the raised portion is machined and the cam is press-fitted in a cantilevered state in which one end of the shaft is held, the configuration of the camshaft assembling machine can be simplified.

[Brief description of drawings]

FIG. 1 is a front view of a camshaft assembly machine.

FIG. 2 is a plan view of a camshaft assembly machine.

FIG. 3 is a side view of an assembly machine body.

FIG. 4 is a plan view of a cam transfer unit.

FIG. 5 is a plan view of knurling means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Assembly machine main body 2 Cam supply part 3 Shaft supply part 4 Cam shaft carry-out part 5 Shaft 6 Cam shaft 10 Press-fit motor 13 Screw shaft 16 Shaft chuck mechanism 17 Chuck motor 18 Chuck 19 Shaft push-up mechanism 21 Cam 22 Shaft transport mechanism 26 Shaft Conveyor 27 Camshaft conveyor mechanism 28 Camshaft conveyor 40 Knurling mechanism 41 Knurling 45 Knurling mechanism 46 Knurling moving mechanism 50 Cam conveying mechanism 51 Piece clamp 54 Piece holder 55 Shuttle cylinder

Claims (4)

[Claims] 1. A protrusion is formed at a predetermined position in the axial direction of the shaft with respect to the circumferential surface of the shaft, and a shaft hole of a cam is press-fitted into the protrusion, and the cam is displaced by a predetermined phase angle and press-fitted by two or more. A camshaft assembling machine in which the shaft holding means for detachably holding one end of the shaft is provided, and the raised portion processing means and the cam holding means for holding the cam are reciprocally movable on the other end side of the shaft. The shaft holding means is rotatable such that the shaft holding means faces the raised portion processing means at a predetermined position in the axial direction of the shaft and rotates, and the shaft can be pushed into the cam holding means at a predetermined phase angle. It is connected to the advancing / retreating means and the shaft rotating means, and the cam holding means is advanced in a state where the shaft is retracted by the shaft advancing / retreating means to advance the shaft advancing means. After the shaft is advanced by the retreating means and the shaft is inserted through the shaft hole of the cam held by the cam holding means, the raised portion is processed by the raised portion processing means at a predetermined position in the axial direction of the shaft, and then the raised portion processing means is used. By retreating, rotating the shaft to a predetermined phase angle by the shaft rotating means, pushing out the shaft by the shaft advancing and retracting means and press-fitting the cam, and repeating the above-described ridge processing and cam press-fitting, the shaft The camshaft assembly machine is characterized in that two or more cams, which are displaced by a predetermined phase angle from each other, are press-fitted to each other. 2. The camshaft assembly machine according to claim 1, wherein the shaft holding means, the raised portion processing means, and the cam holding means are arranged in a vertical direction. 3. A camshaft assembling machine, characterized in that there are two sets of said cam holding means and they are switched alternately. 4. A camshaft assembling machine, characterized in that a distance sensor for measuring the degree of the raised portion is provided in the raised portion processing means.