JP3525073B2 - centrifuge - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifuge for removing oil from the surface of a workpiece such as a bolt or nut that has been wet with oil during machining.

[0002]

2. Description of the Related Art Workpieces such as bolts and nuts, which are machine elements, are manufactured through processing by several lined processing machines.

Taking the manufacture of bolts as an example, for example, the raw material is put into a header and pressed into a bolt shape, which is fed to a rolling machine to cut a screw, and then a trimming machine to make a hexagonal head. There is a processing step such as processing.

Since machine oil is used in each of the machining steps, it is necessary to remove the oil adhering to the surface of the workpiece in order to facilitate the transportation and handling to the next step.

Therefore, a centrifuge is installed between the processing machines to remove the oil adhering to the surface of the work.

[0006] In addition, a workpiece which has been subjected to predetermined processing in an automatic processing line equipped with a plurality of processing machines is often subjected to cleaning, drying, etc. after deoiling, and for this reason, a centrifugal separator is used. In addition, a cleaning device and a drying device are also installed.

As a centrifugal separator installed in the above-mentioned automatic processing line, for example, Japanese Patent Laid-Open No. 10-32858 is available.
There is one described in Japanese Patent No. The centrifuge described in this gazette has a deoiling basket whose body is bulged outwardly and whose diameter is reduced toward the upper and lower openings, and is installed in the deoiling car at the center of the deoiling basket. The oil removal basket and the saucer are rotated at the same time, and the workpieces placed on the saucer are fly-fed by centrifugal force to the body of the oil removing basket to remove oil while attached to the body of the oil removing basket. When the drive of the centrifuge is stopped after a certain period of time has passed, the work is moved to the lower opening of the degreasing basket by the decline of the centrifugal force, and the workpiece drops. A plurality of sets are arranged in the upper and lower stages so that the oil removal can be performed in a multi-stage manner.

[0008]

In the centrifuge having the above-mentioned structure, since the positional relationship between the deoiling basket and the receiving tray is fixed, the workpiece is removed while the centrifugal separator is not driven. When dropped from the upper opening of the oil basket and placed on the saucer, after that, when the centrifuge is driven, the centrifugal force due to the rotation of the saucer causes the workpiece to fly in the air from the saucer to the degreased basket body and rotate at high speed. The oil is removed by being received by the body of the oil removing basket. Therefore, depending on the type of the processed product, there are cases where it falls off from the tray or drops out while it is flying in the hollow. Further, when the work pieces fly in the air from the tray and are received by the deoiled car body, there is a considerable impact and the work pieces collide with each other.

[0009]

In order to solve the above-mentioned problems, the centrifuge of the present invention comprises a deoiling basket having upper and lower openings and a tray arranged in the deoiling basket. In a centrifuge that removes oil from a workpiece by rotating the oil removal basket and the saucer at the same time, install a supply basket above the oil removal basket that has a supply port that corresponds to the upper opening of the oil removal basket. A support shaft that can move up and down is mounted on the shaft center of the, and a pan that comes in contact with and separates from the upper part of the oil removal basket is attached to the support shaft, and an opening / closing lid that opens and closes the supply port in the supply basket It is characterized by having done.

Here, the deoiling basket, which is used when degreasing objects such as bolts and nuts, is generally made of wire mesh.
The body has a cylindrical shape or an arcuate cross-section, and the portion whose diameter is reduced toward the upper and lower openings is tapered.

The supply basket is fixedly mounted, and is formed in a funnel shape as a whole, and when the supply port is opened by pulling up the opening / closing lid, the workpiece placed inside is directed toward the supply port. There is no particular restriction on the shape except that the bottom surface is an inclined surface so that the oil can move smoothly and smoothly.

The support shaft moves up and down by a predetermined stroke around the axis of the oil removing cage, and the opening / closing lid is rotatably attached to the support shaft. When the support shaft is in the raised position, the tray comes into contact with the upper portion of the oil removing car, and at this time, the opening / closing lid is pulled up in the supply car and the supply port is opened. Therefore, when the work is put in the supply basket, the work falls from the supply port into the deoiling basket and is placed on the tray.

At the upper part of the deoiling basket, a cylindrical portion is extended to open an upper opening, and the upper opening is set to be larger than the supply port diameter of the supply car. The product is designed to fall naturally from the supply port of the supply basket so that it can be reliably placed on the saucer, and the impact when it is placed on the saucer is reduced. Further, since the cylindrical portion is provided on the upper portion of the deoiling basket, the processed product is stable on the receiving tray both when it is placed on the receiving tray and after it is placed.

In the above structure, when the saucer is brought into contact with the upper portion of the deoiling basket and the centrifugal separator is driven with the workpiece placed on the saucer, the workpiece on the saucer tends to move toward the peripheral edge of the saucer due to centrifugal force. Indicates. Here, when the saucer and the oil-removing basket reach the high-speed rotation range and a sufficient centrifugal force is applied, when the saucer is lowered together with the support shaft, the workpiece on the saucer rotates at a high speed with the saucer. By moving in a manner of transferring to the car body and maintaining high-speed rotation as it is, the oil is removed from the car body by being attached to the car body. When the driving of the centrifuge is stopped after a certain period of time, the work is moved downward in the degreasing basket body and falls from the lower opening due to the decline of the centrifugal force. In this way, lowering the pan to move the work piece to the deoiling basket is performed from the clearance between the degreasing basket by lowering the pan while the pan starts rotating and centrifugal force is sufficiently applied. Therefore, the processed product does not spill from the saucer or fall into the deoiling basket while it is moving.

Further, while the saucer and the deoiling basket rotate at a high speed to perform deoiling, the work to be deoiled next time is put in the supply basket. When the support shaft rotating at high speed is exposed, a protective tube is erected on the opening / closing lid to prevent direct contact between the support shaft and the workpiece.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a centrifuge.

In FIG. 1, 1 is a deoiling basket, 2 is a support shaft vertically movably mounted on the shaft center of the deoiling car 1, and 3 is inside the deoiling car 1 and is attached to a support shaft 2. A tray 4 is a supply basket arranged above the oil removing basket 1, and 5 is an opening / closing lid attached to the support shaft 2 in the oil removing basket 4.

The degreasing car 1 and the supplying car 4 are generally made of wire mesh when a workpiece such as a bolt or a nut is to be degreased. The deoiling basket 1 rotates integrally with the support shaft 2 and the tray 3. The deoiling basket 1 has a barrel 8 having a cylindrical shape or an arc-shaped cross section, and the upper and lower openings 6 and 7 are formed.
Reduce the diameter towards the part and incline this part in a taper shape,
The upper opening 6 is opened in a tubular portion 9 extending above the oil removing basket 1.

The supply basket 4 is fixedly installed,
It has a supply port 10 corresponding to the upper opening 6 of the deoiling basket 1, and is formed in a funnel shape as a whole so that the supply port 10 is opened with its bottom surface being an inclined surface. Here, the diameter of the upper opening 6 of the oil removing basket 1 is set larger than the diameter of the supply port 10 of the supplying basket 4,
Both the openings 6 and 10 are brought close to each other, so that the workpiece which naturally falls from the supply opening 10 of the supply basket 4 can be reliably placed on the tray 3 and the impact can be reduced.

The support shaft 2 moves up and down by a predetermined stroke, and when the support shaft 2 is in the lowered position, the tray 3 separates from the oil removing basket 1 and the opening / closing lid 5 inside the supply basket 4 opens at the supply port 1.
Close 0. In this state, oil removal is performed and the support shaft 2 rotates at high speed. Therefore, the opening / closing lid 5 is rotatably attached to the support shaft 2, and the opening / closing lid 5 functions only for opening / closing the supply port 10. There is. Further, when the support shaft 2 is in the raised position, the tray 3 contacts the upper part of the oil removing basket 1 and the opening / closing lid 5 is pulled up in the supply basket 4 to open the supply port 10. Therefore,
If the processed product to be deoiled next time is placed in the supply car 4 while deoiling is being performed, this is dropped and supplied from the supply port 10 to the deoiled car 1.

The shape, size, positional relationship and the like of the tray 3 with respect to the deoiling basket 1 described above are set appropriately. Although the degreasing basket 1 and the support shaft 2 are not shown in the drawing,
It is rotatably mounted on an appropriate machine frame, and is connected to a rotary drive mechanism having a motor to rotate. Also, while the oil removal is being performed, the oil removal basket 1 contains a workpiece to be removed next time. At this time, the workpiece that is exposed in the oil removal basket 1 and rotates at high speed and the processing is performed. In order to avoid contact with an object, in the embodiment, a protective tube 11 is provided upright on the opening / closing lid 5 to prevent direct contact between the support shaft 2 and the workpiece.

The deoiling procedure according to the present invention having the above structure will be described with reference to FIGS.

FIG. 2: The work A to be deoiled is put into the supply car 4 with the supply port 10 of the supply car 4 closed by the opening / closing lid 5.

FIG. 3: When the opening / closing lid 5 rises together with the support shaft 2, the supply port 10 is opened and the workpiece A falls into the oil removing basket 1 and is placed on the tray 3.

FIG. 4: If the centrifuge is driven in this state, the work A on the tray 3 will be subjected to centrifugal force to cause the tray 3 to move.
Shows a tendency to move in the peripheral direction. At the time when the saucer 3 and the oil removing basket 1 reach the high speed rotation range and the centrifugal force is sufficiently applied,
When the receiving tray 3 is lowered together with the support shaft 2 and separated from the oil removing basket 1, the work A on the receiving tray 3 moves in a form of being transferred to the oil removing basket body 8 rotating at high speed together with the receiving tray 3, The oil is attached to the oil basket body 8 and deoiled.

After that, when the driving of the centrifugal separator is stopped after a lapse of a certain time, the work A falls from the lower opening 7 of the oil removing basket 1 due to the decline of the centrifugal force and is transferred to the next step.

FIG. 5 is a block diagram of a centrifuge showing another embodiment of the present invention. This embodiment is different from the above-mentioned deoiling car 1 and support shaft 2 in deoiling car 1
A is a structure in which a set of a and a tray 3a are continuously arranged in a vertical manner, and the work A is supplied from the supply car 4 to the upper deoiling car 1, and the workbetween the deoiling cars 1 and 1a is processed. By repeatedly driving and stopping A of the centrifuge, the work A is degreased by moving the work A from the upper deoiling basket 1 to the lower deoiling basket 1a via the tray 3a. The work A having the above structure is appropriately inverted so that the oil adhering to the inside can be effectively deoiled.

Although not shown in the figure, the support shaft 2 is provided with a nozzle for supplying a cleaning liquid, and the cleaning liquid is jetted from the nozzle while the workpiece is attached to the deoiled car barrel and stabilized. Or to drain the cleaning liquid adhering to the work piece by centrifugal force after the cleaning as in the case of deoiling. Furthermore, the support shaft 2 is provided with a nozzle for supplying a drying gas, and the nozzle is used for drying. It is also possible to spray gas to actively dry the work piece. Further, the nozzles for injecting the cleaning liquid and the nozzles for injecting the drying gas are provided in the deoiling baskets 1 and 1a having different vertical steps so that the work A is washed and dried in the individual deoiling baskets 1 and 1a. You may

[0030]

The present invention is embodied in the form as described above, and according to the present invention, when the support shaft is raised,
Place the workpiece placed in the supply basket on the saucer that is in contact with the upper part of the oil removing basket, rotate the oil removing basket and the saucer as it is, and when the prescribed centrifugal force is applied, lower the support shaft and place it on the saucer. Since the work is moved by centrifugal force to transfer it to the body of the deoiling basket and continues to rotate at high speed, degreasing is performed from the stationary feed car through the pan. The workpiece can be smoothly and surely moved to the oil basket, and the workpiece can be effectively deoiled regardless of the type of the workpiece without hitting marks or deformation.

[Brief description of drawings]

FIG. 1 is a configuration cross-sectional view of a centrifuge showing an embodiment of the present invention.

FIG. 2 is a sectional view of the configuration of a centrifuge for explaining a deoiling procedure according to the present invention.

FIG. 3 is a cross-sectional view of the configuration of a centrifuge for explaining the deoiling procedure according to the present invention.

FIG. 4 is a sectional view showing the configuration of a centrifuge for explaining the deoiling procedure according to the present invention.

FIG. 5 is a sectional view showing the configuration of a centrifugal separator according to another embodiment of the present invention.

[Explanation of symbols] 1a Degreasing basket 2 Support shaft 3 saucer 3a saucer 4 supply baskets 5 Open / close lid 6 Upper opening 7 Lower opening 8 torso 9 Deoiling basket cylinder 10 Supply port 11 Protection tube A processed product

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B04B 3/00 B23Q 11/00

Claims (3)

(57) [Claims] 1. A centrifuge for removing oil from a workpiece by providing an oil removing basket having upper and lower openings and a tray arranged in the oil removing basket, and rotating the oil removing basket and the tray simultaneously to remove oil from a workpiece. A supply car having a supply port corresponding to the upper opening of the deoiling car is provided above the car, and a vertically movable support shaft is provided at the shaft center of the deoiling car. A centrifuge characterized in that a saucer that comes into contact with and separates from the upper part is attached, and an opening / closing lid that opens and closes the supply port in the supply car is attached. 2. When the support shaft is in a raised position, the peripheral edge of the pan is brought into contact with the upper portion of the oil removing basket, and the opening / closing lid is pulled up into the supply basket to open the supply port. centrifuge. 3. A cylinder part is extended above an oil removing car to open an upper opening, and the upper opening is set to be larger than a supply port diameter of a supply car so that both ports are brought close to each other. The centrifuge according to Item 1 or 2.