JP7702115B2 - Cutting oil collection container - Google Patents

Description

The present invention relates to a cutting oil recovery container that separates and recovers cutting oil by natural filtration from metal cutting chips generated during cutting processing and from metal cutting chunks formed by compressing these metal cutting chips into chunks.

In general, when cutting various metal parts using a machine such as a lathe, oil-based or water-soluble cutting oil is applied to the cutting area to suppress friction and cool the contact surface between the metal part and the machine tool such as the lathe. The metal cutting chips generated in this process are long and curled, and there are many spaces between the cutting chips that become dead space, making them very bulky and requiring frequent collection. In addition, a large amount of cutting oil adheres to the metal cutting chips.

Conventionally, the main method for disposing of such metal cutting chips has been to discharge the metal cutting chips from the cutting machine to a transport cart on a spiral conveyor or the like, and then compress them to a certain size using a large compressor to either dispose of or recycle them. However, as mentioned above, the shape of the cutting chips is often long and curled, and the cost of transporting them to the transport cart is also high. To address this issue, Patent Document 1 proposes a metal cutting chip compression device that compresses bulky metal cutting chips into metal cutting chunks. With such a device, bulky metal cutting chips can be collected in a compressed state into plate-shaped or columnar chunks, which eliminates the hassle of replacing collection boxes, but the cutting oil adhering to the metal cutting chunks drips down and causes oily liquid pools in the collection box.

Conventionally, methods have been proposed for recovering cutting oil from metal cutting chips before compression in a part of a cutting machine. For example, in Patent Document 2 and Patent Document 3, a container is provided in a part of a cutting machine, configured to suck cutting oil from an oil reservoir in the container using a pump. However, such containers are intended to be attached to a specific processing machine and to recycle the cutting oil, and cannot be used as a container alone. For example, Patent Document 4 discloses a chip transport cart that uses gravity to separate cutting oil and chips and can be transported.

JP 2017-42777 A JP 2003-275937 A JP 2022-130002 A Japanese Patent Application Publication No. 11-207562

However, since the metal cutting lumps formed in the device of Patent Document 1 are attached to a specific processing machine as described above, it was not possible to use containers such as those of Patent Documents 2 and 3. In addition, if the metal cutting chips before compression molding are put into the collection container, they naturally spread along the bottom of the container, so that the metal cutting chips can be put in one after another. However, the metal cutting lumps of Patent Document 1 have a problem that they do not spread along the bottom of the container due to their shape and pile up in the collection container. If they pile up, the collection container must be replaced immediately or the cutting machine must be stopped, so a method of recovering the cutting oil from the metal cutting lumps must be taken. In addition, there is a problem that the lumps of the metal cutting lumps break down due to the impact of collision between the metal cutting lumps. If there is a bottom plate that is parallel to the floor surface as in Patent Document 4, the oil does not drain well and the oil adheres to the bottom plate, resulting in poor recovery efficiency.

In view of the above problems, the present invention aims to provide a cutting oil recovery container that can efficiently separate cutting oil from compressed metal cutting blocks without crumbling, and can efficiently recover cutting oil from metal cutting chips.

The first feature of the present invention is that in a cutting oil recovery container that is composed of a bottom plate and side plates attached to its periphery, into which metal cutting chips and metal cutting chunks formed by compressing metal cutting chips are poured, an oil collection manhole is erected on the inner surface of the side plate, the bottom plate is formed with a concave shape with a recessed center and is tilted toward the oil collection manhole, and an oil passage hole is formed at the bottom of the oil collection manhole through which oil passes.

The second feature is that the bottom surface of the bottom plate is provided with multiple casters and a handle is provided on the side, and the third feature is that the oil collection tank is provided with an oil drainage mechanism.

Due to the above configuration, the present invention is able to hold the metal cutting blocks in place without destroying their shape, particularly by forming the bottom surface into a concave shape, i.e., a curved cross section, and tilting it in one direction. Furthermore, cutting oil that naturally flows down from the metal cutting blocks and cutting chips naturally collects in the oil collection basin along the slope of the bottom surface, allowing for efficient oil recovery. In addition, because the metal cutting blocks are arranged along the sloped bottom surface, it is possible to prevent the metal cutting blocks from being piled up in only certain locations.

In addition, an oil hole is formed at the bottom of the oil collection basin, so by attaching a suction device such as a pump to the oil collection basin, it is possible to easily collect only the cutting oil inside the container.

In addition, by providing casters on the bottom plate and handles on the sides to create a cart configuration, metal cutting chips and metal cutting chunks can be added to the container one after another, making it easy to transport even if the total weight becomes large.

1 is a perspective view showing a cutting oil recovery container according to the present invention from the front side; 1 is a perspective view showing a cutting oil recovery container according to the present invention from the rear side. FIG. FIG. 2 is a plan view of the cutting oil recovery container according to the present invention. 1 is a cross-sectional view of a cutting oil recovery container according to the present invention.

The following describes an embodiment of the present invention based on the examples shown in the drawings.

As shown in Figures 1 to 4, the cutting oil recovery container 1 of the present invention is a box-shaped container consisting of one bottom plate 2 and four side plates 31, 32, 33, and 34 provided on its periphery. For example, the bottom plate 2 is a rectangular metal plate 800 mm long, 500 mm short, and 2.3 mm thick, formed with a curved cross section with a concave central portion. Four side plates 31, 32, 33, and 34 are erected on the periphery of the bottom plate 2, and the side plates 31 and 32 are rectangular metal plates 500 mm wide and 405 mm high, and the side plates 33 and 34 are rectangular metal plates 800 mm wide and 405 mm high. The side plates 31, 32, 33, and 34 have the same thickness as the bottom plate 2. As shown in FIG. 4, the bottom plate 2 is curved with a bending radius R of 400 mm and is inclined downward with respect to the floor surface at an angle θ of 4 degrees. Therefore, the metal cutting chunks 8 and the cutting oil that naturally flows down from the metal cutting chunks 8 move naturally along the inclination of the bottom plate 2 and to the most recessed part of the bottom plate 2. As shown in the figure, the bottom plate 2 is provided so as to be inclined toward the side plate 31, and the metal cutting chips on the bottom plate 2, the metal cutting chunks 8, and the cutting oil that naturally flows down from the metal cutting chunks 8 move toward one side of the side plate 31.

A plurality of casters 6 are provided on the underside of the bottom plate 2 so as to be freely rotatable. The casters 6 are capable of moving freely in the direction in which the cutting oil recovery container 1 rotates, and the number of casters provided on the underside of the bottom plate 2 is not limited to four as shown in this embodiment, but may be three or more, or may be two. A grip 5 is provided on the outer surface of the side plate 32 for gripping when moving the cutting oil recovery container 1. The grip 5 is not limited to a roughly U-shaped metal pipe as shown in this embodiment, and various shapes and materials can be used as long as they are easy to operate and move the cutting oil recovery container 1.

A metal plate bent into a U-shape is erected on the inner surface of the side plate 31, and an oil collection manhole 4 is provided. An oil passage hole 41 is provided by cutting out a portion of the lower part of the oil collection manhole 4. The size of the oil passage hole 41 is preferably large enough that metal cutting chips and metal cutting chunks 8 cannot pass through, and multiple oil passage holes 41 may be provided. As described above, the bottom plate 2 is inclined downward toward the side plate 31, so that cutting oil that naturally flows down from the metal cutting chips and metal cutting chunks 8 flows into the internal space of the oil collection manhole 4 through this oil passage hole 41.

If necessary, a liquid collector 7 or oil suction pump (not shown) is inserted into the oil collection manhole 4 to discharge the oil stored in the internal space to the outside of the cutting oil recovery container 1. This oil discharge mechanism is not limited to a specific form, and any form of mechanism that can discharge the oil stored in the oil collection manhole 4 to the outside can be used.

The metal cutting chunks 8 are metal chips and metal cutting shavings discharged from a cutting machine that have been molded into a block of a specific shape using a compressor or similar device. The metal cutting chunks 8 can be molded into various shapes, such as columns, plates, and spheres, and are formed into a block with cutting fluid sprayed onto the metal chips and metal cutting shavings to improve processing accuracy and tool life during compression molding and cutting processing.

The metal cutting blocks 8 are contained in the cutting oil recovery container 1 of the present invention, and move to gather near the oil reservoir 4 as the bottom plate 2 inclines. Cutting oil is naturally filtered from the metal cutting blocks 8 during or after movement, and flows along the bottom plate 2 into the oil reservoir 4. In addition, since the bottom surface 2 of the metal cutting blocks 8 that are put into the cutting oil recovery container 1 is inclined, it is possible to reduce the impact when put in and prevent the metal cutting blocks 8 from collapsing. In addition, cutting chips that were attached to the metal cutting blocks 8 and cutting chips that have detached from the metal cutting blocks 8 also move around the oil reservoir 4 in the same manner as the movement of the metal cutting blocks 8. Not only the metal cutting blocks 8 but also metal cutting chips before compression are put into the cutting oil recovery container 1.

The present invention is not limited to the above examples, which are merely illustrative, and it goes without saying that modifications and additions to the components are possible without departing from the scope of the claims.

The inclination angle of the bottom plate 2 is 4 degrees, but due to the relationship between the viscosity coefficient of the cutting oil and the fluid velocity, it is preferable that the lower limit of the inclination angle be 4 degrees or more.

REFERENCE SIGNS LIST 1 Cutting oil recovery container 2 Bottom plate 31 Side plate 32 Side plate 33 Side plate 34 Side plate 4 Oil collecting basin 41 Oil passage hole 5 Grip portion 6 Caster 7 Liquid collector 8 Metal cutting block

Claims (3)

A cutting oil recovery container composed of a bottom plate and side plates attached to its periphery, into which metal cutting chips and metal cutting chunks formed by compressing the metal cutting chips are poured, characterized in that an oil collection manhole is erected on the inner side of the side plates , the bottom plate is formed with a curved cross-section having a bending radius and is inclined toward the oil collection manhole, and an oil passage hole through which oil passes is formed at the bottom of the oil collection manhole. The cutting oil recovery container according to claim 1, characterized in that the bottom surface of the bottom plate is provided with multiple casters and further has a gripping portion on the side. The cutting oil recovery container according to claim 1 or 2, characterized in that the oil collection basin is provided with an oil discharge mechanism.

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