JP3353103B2 - Casting surface finishing method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for finishing a cast surface used for finishing a surface of a camshaft as a mechanical element of a valve system of an automobile, for example.

[0002]

2. Description of the Related Art As shown in FIG. 7, a camshaft as a casting W of this type is formed by forming a plurality of egg-shaped cam portions b on a camshaft main body a with grooves c.

[0003] When these castings are completed, castings and other deposits are present on the surfaces of the castings, and it is not necessary to completely remove them. However, from the viewpoint of commercial value and product quality, at least the castings are required. Finishing is done to polish the surface.

[0004]

Conventionally, however, such finishing is performed by manually or mechanically pressing a casting or the like on the outer peripheral surface of the rotary grindstone. In the case of a round shaft-shaped member, the convex surface and the convex surface are brought into pressure contact with each other, and the surface such as the cast upholstery is removed and finished in a concave shape by the outer peripheral surface of the rotating grindstone, thereby deteriorating the casting quality. There is an inconvenience that there is a case.

[0005]

The object of the present invention is to solve such a problem.
The method according to claim 1 is characterized in that the casting is transferred when the surface of the casting is finished with a rotating grindstone .
With the transfer, Hitoshi comprising balance weight on the surface of the template material
While being pressed by the pressing force set by the balance mechanism, the rotating shaft can swing in the casting transfer direction according to the surface shape of the casting .
That in the casting surface finishing method characterized by finishing the grinding wheel.

According to a second aspect of the present invention, the casting mechanism is set by a transfer mechanism capable of transferring a casting and a balancing mechanism including a balance weight on the surface of the casting as the casting is transferred .
A casting surface finishing apparatus comprising: a rotating grindstone capable of swinging in the direction in which the casting is transferred while being pressed by a pressing force while following the surface shape of the casting; and a rotating mechanism for rotating the rotating grindstone. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS.
An embodiment of the present invention applied to a structure for polishing the surface of the present invention, wherein 1 is a transfer mechanism, comprising a conveyor 2 having a belt conveyor structure or a chain conveyor structure,
In this conveyor 2, holding portions 3 capable of holding and releasing both ends of a camshaft main body a of a camshaft as a casting W in this case are arranged in parallel, and a plurality of holding portions 3 are automatically or artificially provided at the start end side of the conveyor 2 in the transfer direction. The castings W are sequentially supplied to the holding units 3, and the casting W held by the holding units 3 is linearly transferred in one direction. At the end in the transfer direction, the casting W is automatically or artificially transferred to the plurality of holding units 3. It is configured to sequentially take out the held castings W.

Reference numeral 4 denotes a rotary grindstone. In this case, a plurality of disc-shaped grinding wheels are used. A machine frame 5 is erected on the conveyor 2 and a pair of bearing portions 6 opposed to the machine frame 5. Two sets are arranged along the transfer direction, and a fulcrum shaft 8 is erected on each bearing 6,
A plurality of swing arms 7 are independently pivotally mounted on each fulcrum shaft 8 in a parallel state so as to be vertically swingable in the transfer direction of the casting W.
A bearing stand 9 serving also as a grindstone cover at the tip of each swing arm 7
Is mounted, and the grindstone shaft 10 is mounted on the bearing base 9 so as to be freely rotatable,
The rotating grindstone 4 is attached to the grindstone shaft 10. In this case, the swing arm 7 on the front side in the transfer direction is pressed against every other groove c among the plurality of grooves c and has a width corresponding to the width of each groove c. A rotating grindstone 4 having a width is provided, and a rotating grindstone 4 having a width corresponding to the width of each groove c is provided on the swing arm 7 at a position forward of the rotating grindstone 4 in the transfer direction. Since the width of the grooves c is small, they are arranged to be shifted back and forth in order to avoid mutual interference of the rotating grindstones 4. First, every other groove c of the plurality of grooves c is removed. Grinding, and then grinding the remaining groove c, and pressing the rotary whetstone 4 against the surface of the casting W by the weight of the rotary whetstone 4 and the swing arm 7 while following the surface shape of the casting W in the transfer direction of the casting W It is configured to be swingable independently about the fulcrum shaft 8 There.

Reference numeral 11 denotes a rotating mechanism. In this case, an electric motor 12 is used. The electric motor 12 is mounted on the swing arm 7, and the main shaft of the electric motor 12 is directly connected to the grinding wheel shaft 10. The grindstone 4 is configured to rotate.

Reference numeral 13 denotes a balancing mechanism. In this case, a mounting rod 7a is integrally formed on each of the swing arms 7 so as to protrude therefrom, and a balance weight 14 is mounted on the protruding rod 7a so as to be adjustable in position. The weight of the balance weight 14 and the distance from the fulcrum shaft 8 are provided so as to be adjustable, and the weight of the rotating grindstone 4 and the swing arm 7 having the fulcrum shaft 8 as a fulcrum and the weight of the balance weight 14 and the weight from the fulcrum shaft 8 By adjusting the weight balance with the distance, the pressure contact force between the surface of the casting W and the outer peripheral surface of the rotary grindstone 4 can be individually and variably set.

Since this embodiment has the above configuration,
The rotating wheel 4 is rotated by the rotating mechanism 11 and the conveyor 2 is rotated.
In the transport direction starting end side, automatically or artificially supplied sequentially casting W to a plurality of holding portions 3, it will be transferring the casting W by the transfer mechanism 1, along with the transfer in the course the transfer Each rotary grindstone 4 is pressed against the surface of the casting d existing on the surface of the plurality of grooves c of the camshaft as the casting W, and each rotary grindstone 4 is pressed against the surface of the casting W while moving in the casting direction. Independently and separately swinging, the surface of the casting d of the casting W can be finished by this pressure contact, and is automatically or artificially held by the holding unit 3 at the end in the transfer direction. Castings W are sequentially taken out.

Therefore, as shown in FIG. 6, the surface of the casting d of the casting W and the outer peripheral surface of the rotary grindstone 4 are relatively pressed against each other according to the surface shape of the casting d of the casting W. In this case, each of the rotary whetstones 4 swings independently according to the surface shape of each of the castings d of the casting W, and the surface of the casting d of the casting W and the outer peripheral surface of the rotary whetstone 4 are pressed well, Thus, a good finished state can be obtained.

In this case, the pressing force between the surface of the casting W and the outer peripheral surface of the rotary grindstone 4 is optimally set by the balancing mechanism 13, so that the surface of the casting d of the casting W and the outer peripheral surface of the rotary grindstone 4 Of the balance weight 14 in this case.
Are provided so that the distance from the fulcrum shaft 8 can be adjusted.
By adjusting the weight balance between the self-weight, the weight of the balance weight 14 and the distance from the fulcrum shaft 8, the pressing force can be easily set variably, and the finishing workability can be improved, and the processing cost can be reduced accordingly. Reduction can be achieved and the structure can be simplified.

When the finishing of one of the castings d is completed, the other casting d is finished in the same manner as described above.

The present invention is not limited to the above embodiment. For example, a rotating structure is added to the holding portion 3 and the casting W is rotated about its axis during the press-contact, so that the opposed position is obtained. Groove part c of casting W including casting d
Can be finished and the structure of the transfer mechanism 1 and the type of the rotary grindstone 4 are appropriately selected according to the casting.

[0016]

According to the present invention as described above, in the invention of claim 1 or 2, wherein the casting is transferred by the transfer mechanism to rotate the rotary grindstone by a rotating mechanism, this transfer
Accordingly, during the transfer, the rotating grindstone is pressed against the surface of the casting, and the rotating grindstone includes a balancing weight on the surface of the casting.
While being pressed by the pressing force set by the balance mechanism, it swings in the direction of transport of the casting, and the surface of the casting can be finished by this pressing, and the surface of the casting and the rotating grindstone follow the surface shape of the casting. Pressure contact between the surface of the casting and the outer peripheral surface of the rotating grindstone is made well, so that a good finished state can be obtained.Furthermore, the surface of the casting and the outer peripheral surface of the rotating grindstone can be Pressure is set optimally, so that the surface of the casting and the rotating grindstone can be better contacted, the finishing workability can be improved, the processing cost can be reduced and the structure can be simplified. Can be planned.

As described above, the intended purpose can be sufficiently achieved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an embodiment of the present invention.

FIG. 2 is a partial side view of the embodiment of the present invention.

FIG. 3 is a partial plan view of the embodiment of the present invention.

FIG. 4 is an enlarged side view of the embodiment of the present invention.

FIG. 5 is an enlarged side view of the embodiment of the present invention.

FIG. 6 is an enlarged explanatory side view of the embodiment of the present invention.

FIG. 7 is a perspective view of a camshaft.

[Explanation of symbols]

W Casting 1 Transfer mechanism 4 Rotating grindstone 11 Rotating mechanism 13 Balancing mechanism 14 Balance weight

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B24B 19/12 B22D 29/00

Claims (2)

(57) [Claims] Upon the 1. A surface of the casting to finishing operation by rotating grindstone, to transfer the casting, with the transfer of the template material
The balance mechanism including a balance weight on the surface of the casting
A method for finishing a casting surface, wherein the finishing is performed by a rotating grindstone that can swing in the direction of transport of the casting while being pressed against the surface of the casting while being pressed by a set pressing force . 2. A transfer mechanism capable of transferring a casting, and a transfer mechanism for transferring the casting.
Equilibrium including the balance weight on the surface of the casting with transfer
A casting surface, comprising: a rotating grindstone capable of swinging in the direction in which the casting is transferred in accordance with the surface shape of the casting while being pressed by the pressing force set by the mechanism; and a rotating mechanism for rotating the rotating grindstone. Finishing equipment.