JPH0351505B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application The present invention relates to a shaft member finishing machine for finishing the circumferential surface of a shaft member.

(2) Conventional technology As a device for finishing the circumferential surface of a shaft member, the 13th
The ones shown in FIG. 1 and FIG. 14 are known. The one in Fig. 13 is a device for rolling and finishing the shaft member b by rotating three die rolls a having die surfaces on the outer periphery, and the one in Fig. 14 is a device for rolling and finishing the shaft member b, which has a grinding surface on the outer periphery. This is a device that grinds and finishes the shaft member b by rotating the shaft member b on the fixed work rest d and forcibly rotating the shaft member b in the opposite direction.

(3) Problems to be Solved by the Invention The conventional devices described above are inefficient because they can only finish one shaft member at a time. Further, in the apparatus shown in FIG. 13, when finishing a thin shaft member, a roll with a small diameter must be used, which may cause the roll to warp. Therefore, it is not possible to finish a very thin shaft member. On the other hand, since the apparatus shown in FIG. 14 is a grinding type, the frictional resistance is large and the shaft member must be forcibly rotated, so this is also not suitable for finishing very thin shaft members.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a rolling type shaft member finishing machine that can process a large number of shaft members continuously and efficiently, and can finish even fairly thin shaft members with high precision.

(4) Means for Solving the Problems In order to eliminate the drawbacks of the conventional device described above and achieve the above object, the shaft member finishing machine according to the present invention includes a circular rotating die wheel having an annular die surface on the outer periphery. , a stationary die member having an arcuate die surface extending to correspond to a part of the annular die surface of the rotating die wheel so as to finish rolling the peripheral surface of the shaft member between the annular die surface and the annular die surface; , has a thickness smaller than the diameter of the portion of the shaft member to be finished,
an annular hole disposed around the outer periphery of the die wheel in a state where circumferential movement is not restricted, and having a hole in which the shaft member is rotatably fitted and held so that the axial direction of the shaft member is always maintained constant; and a guide belt.

Each of the annular die surface of the rotating die wheel and the arcuate die surface of the stationary die member are arranged in two strips spaced apart from each other so as to contact the peripheral surfaces of both ends of the shaft member to be finished, and A recess for accommodating the intermediate enlarged diameter portion of the shaft member may be formed between the die surfaces and between the arcuate die surfaces.

(5) Function The shaft members to be finished are fed from the upper end side of the fixed die member so as to be placed one after another in the holes of the guide belt. By the rotation of the rotating die wheel,
The shaft member rolls downward along an arcuate path along the shape of both die surfaces while its circumferential surface is rolled between the annular die surface of the rotating die wheel and the arcuate die surface of the fixed die member. It is released from the lower end side of the member. The guide belt prevents the shaft member from tilting in the axial direction by rotatably fitting and holding the shaft member in the hole. The guide belt is not directly driven by the rotation of the rotary die wheel, but is rotated by the movement of the shaft member that moves along the arcuate path while being rolled and finished.

(6) Embodiment As shown in FIGS. 1 and 2, the shaft member finishing machine according to the present invention includes a circular rotating die wheel 1, a fixed die member 2, and an annular guide belt 3. . The rotating die wheel 1 receives driving force from a motor 6 via gears 4 and 5, and rotates counterclockwise as viewed in FIG. The rotating die wheel 1 is a support base 7
The support stand 7 is attached to the base stand 8. The rotating die wheel 1 has an annular die surface 9 on its outer periphery, as shown in detail in FIG. For example, a shaft member 10 having an intermediate enlarged diameter portion (this circumferential surface does not need to be finished) as shown in FIG.
In order to finish the circumference of both ends of the annular die surface 9
are arranged in two strips spaced apart from each other so as to contact the circumferential surfaces of both ends of the shaft member 10. A recess 11 is formed between the two annular die surfaces 9 for accommodating the intermediate enlarged diameter portion of the shaft member 10. At least the annular die surface 9 of the rotating die wheel 1 is made of a hard material such as cemented carbide.

As shown in detail in FIGS. 4 to 6, the fixed die member 2 has an arcuate die surface 12 made of a hard material such as cemented carbide. The arcuate die surface 12 extends in two strips to correspond to a part of the annular die surface 9 of the rotating die wheel 1, and a recess 13 corresponding to the recess 11 of the rotary die wheel 1 is formed between the arcuate die surfaces 12. has been done. Arc-shaped die surface 12
The peripheral surface of the shaft member is rolled and finished between it and the annular die surface 9 of the rotating die wheel 1. Figures 1 and 6
As shown in the figure, the upper end of the fixed die member 2 is bifurcated to facilitate feeding of the shaft member. The fixed die member 2 is mounted on a support base 15 so as to be rotatable around an axis 14 perpendicular to the plane of the paper in FIG. The support base 15 has upper and lower adjustment screws 16 and 1 in a direction perpendicular to the axis 14.
7 is provided. The tips of the adjusting screws 16 and 17 are in contact with the upper and lower shoulders of the fixed die member 2, and by moving the adjusting screws 16 and 17 back and forth, the fixed die member 2 rotates around the shaft 14. The position of the arcuate die surface 12 with respect to the annular die surface 9 of the die member 1 can be changed. Further, the support stand 15 is attached so as to be movable back and forth (left and right as seen in FIG. 2) with respect to the base stand 8, and the position of the support stand 15 is adjusted by an adjustment screw 18 provided on the base stand 8. It can be adjusted back and forth together with the fixed die member 2.

The third component of the shaft finishing machine according to the invention is an annular guide belt 3 disposed around the outer periphery of the rotary die wheel 1 . Guide belt 3
, the shaft member has an annular die surface 9 and an arcuate die surface 12.
A plurality of holes that rotatably fit and hold the shaft member so that the axial direction of the shaft member is always maintained constant parallel to the axis of the rotary die wheel 1 when the shaft member is rolled and finished between the It has 19. The shape of the hole 19 is determined by the shape of the shaft member to be finished. Shaft member 1 having an intermediate enlarged diameter portion as shown in FIG.
0, a hole 19 with a corresponding shape is provided (FIG. 7), and when a simple rod-shaped shaft member 20 as shown in FIG. figure). However, it is also possible to fit and hold the shaft member 20 as shown in FIG. 10 using the guide belt 3 provided with holes as shown in FIG. 7. FIG. 11 is a radial cross-sectional view showing a state in which the circumferential surfaces of both ends of the shaft member 10 are being rolled and finished. The thickness of the guide belt 3 is smaller than the diameter of both ends of the shaft member 10 to be finished, so that it does not interfere with the rolling finish. Guide belt 3
can be made of plastic or metal sheets, for example. The guide belt 3 is loosely placed around the outer periphery of the rotary die wheel 1 and is not restrained from moving in the circumferential direction. Therefore, the guide belt 3 is rotated by the movement of the shaft member which moves along an arcuate path between the die faces due to the rotation of the rotary die wheel 1. The rotation of the guide belt 3 at this time is
The rotation is in the same direction as the rotating die wheel 1, but the speed is 1/2. As shown in Figures 7 and 9,
A protrusion 21 is placed at an appropriate location on the side of the guide belt 3.
is provided. This projection 21 is bent toward the rotating die wheel when the guide belt 3 is placed on the rotating die wheel 1, and serves to prevent it from coming off in the lateral direction.

When using the shaft member finishing machine according to the present invention, while rotating the rotary die wheel 1, the shaft members to be finished are placed one after another in the holes 19 of the guide belt 3, starting from the upper end of the fixed die member 2. supply At this time, an automatic feeding device (not shown) may be used. Further, as described above, the guide belt 3 is not directly driven by the rotation of the rotary die wheel 1, so an external force is required for initial driving of the guide belt 3. When the first shaft member begins to move downward along the arcuate path while being rolled and finished between the annular die surface 9 and the arcuate die surface 12,
The guide belt 3 is driven by the movement of the shaft member. The shaft member reaches the lower end of the fixed die member 2 while its peripheral surface is rolled between the die faces, and there it falls out of the hole 19 of the guide belt 3 and is guided along the chute 22 to a storage container (not shown).

The finished dimensions of the shaft member are determined by the distance between the annular die surface 9 and the arcuate die surface 12, and this adjustment is performed by operating the adjustment screws 16 and 17 and the adjustment screw 18 as described above. .

Moreover, these adjustment screws make it possible to finish shaft members having diameters within a certain range using the same finishing machine.

Furthermore, the support stand 7 that supports the rotary die wheel 1 may be movably adjusted in the axial direction of the rotary die wheel 1 with respect to the base 8. By doing this, as shown in FIG.
Since the inner wall surface of No. 3 can be brought into contact with the side surface of the intermediate enlarged diameter portion of the shaft member 10, this side surface can also be ground and finished.

When the shaft member finishing machine according to the present invention was actually operated, it was possible to finish more than 34 shaft members in one minute. The roundness is within 1 micron,
There was no problem even if there was a variation of several tens of microns in the shaft diameter before finishing. Additionally, the oval shape was also modified after finishing.

In addition, when it is desired to finish the entire circumferential surface of a simple round shaft member as shown in FIG. 10, the entire surface may be used as the die surface without providing a recess on the annular die surface and the arcuate die surface.

(7) Effects of the Invention According to the shaft member finishing machine of the present invention, a large number of shaft members can be finished continuously and efficiently. In addition, the peripheral surface is rolled and finished while the shaft member is rolled between the annular die surface on the outer periphery of the large-diameter rotary die wheel and the corresponding arcuate die surface of the fixed die member. , it is possible to finish even shaft members with a fairly small shaft diameter. Furthermore, the provision of the guide belt prevents the shaft member from tilting, and dimensional accuracy is significantly improved.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of a shaft member finishing machine according to the present invention. FIG. 2 is a sectional view taken along line A-A in FIG. 1. Figure 3 is a side view of the rotating die wheel. FIG. 4 is a front view of the fixed die member. FIG. 5 is a right side view of the fixed die member. FIG. 6 is a fragmentary view of the upper end of the fixed die member in FIG. 4, viewed from the direction of arrow B. FIG. 7 is a fragmentary plan view showing one embodiment of the guide belt. FIG. 8 is a plan view of a shaft member finished using the guide belt of FIG. 7. FIG. 9 is a fragmentary plan view showing another embodiment of the guide belt. 10th
The figure is a plan view of a shaft member finished using the guide belt of FIG. 9. FIG. 11 is a fragmentary sectional view showing the mutual positional relationship among the rotating die wheel, the fixed die wheel, the guide belt, and the shaft member to be finished. FIG. 12 is a view similar to FIG. 11, but shows a state in which the rotating die wheel and the fixed die wheel are laterally offset from each other. FIG. 13 is a schematic diagram showing an example of a conventional shaft member finishing machine. FIG. 14 is a schematic diagram showing another example of a conventional shaft member finishing machine. 1... Rotating die wheel, 2... Fixed die member,
3... Guide belt, 4, 5... Gear, 6... Motor, 7, 15... Support stand, 8... Base, 9...
Annular die surface, 10, 20...Shaft member, 11, 1
3... Concavity, 12... Arc-shaped die surface, 14...
Shaft, 16, 17, 18...adjustment screw, 19...
Hole, 21... Protrusion, 22... Shoot.

Claims (1)

[Scope of Claims] 1. A circular rotating die wheel having an annular die surface on the outer periphery, and a shaft member extending so as to correspond to a part of the annular die surface of the rotating die wheel and between the annular die surface. A fixed die member having an arcuate die surface designed to roll and finish the circumferential surface, and a fixed die member having a thickness smaller than the diameter of the portion of the shaft member to be finished, and the above-mentioned fixed die member having a circumferential movement unrestricted. A shaft member finish comprising: an annular guide belt disposed around the outer periphery of the die wheel and having a hole in which the shaft member is fitted and held so that the shaft member is rotatable so that the axial direction of the shaft member is always maintained constant; Machine. 2. Each of the annular die surface of the rotating die wheel and the arcuate die surface of the stationary die member are arranged in two strips spaced apart from each other so as to contact the circumferential surface of both ends of the shaft member to be finished, and The shaft according to claim 1, wherein a recess for accommodating the intermediate enlarged diameter portion of the shaft member is formed between the annular die surfaces and between the arcuate die surfaces of the strip, respectively. Part finishing machine.