JP2001149812A - Apparatus for recovery of magnetic metal chip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus wherein chips can be smoothly and efficiently attracted, peeled off and delivered at a low cost by a light-weighted structure in the apparatus for recovering magnetic metal on a material surface by attraction with a magnetic roll. SOLUTION: A round bar magnet having radially a magnetizing direction is arranged coaxially in a fixed nonmagnetic external cylinder, and lines of magnetic force going in and out from adjacent different magnetic poles are moved around magnetic metal chips, iron powder, rust, or the like, on a material surface by rotatively driving the round bar magnet. Thereby, attraction of the magnetic metal chips on the material surface is made easy, and the attracted chips, or the like, are transported along a peripheral direction of the nonmagnetic external cylinder. For the chips on a high temperature material, a cooling medium is forced to be circulated between the round bar magnet and the nonmagnetic external cylinder to cool both, thereby, enabling to treat the chips. Further, by constituting a spiral guide groove or guide wall on a surface of the nonmagnetic external cylinder, the chips are enabled to be conveyed in the axial direction of the round bar magnet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically and continuously collecting magnetic metal chips and iron powder, and more particularly to a magnetic metal chip collecting apparatus using a round bar magnet for adsorbing and transporting chips. About.

[0002]

2. Description of the Related Art Automatic chip recovery is used when metal chips, which are by-products, are collected and reused as resources, or when chips have a detrimental effect on the coolant circulation system or cutting phenomena. Is necessary to solve the problem. It is also necessary to remove and collect magnetic metal, such as rust or iron powder, adhering to the surface of the steel sheet in steel production and the like, which causes quality deterioration in the rolling operation of the steel sheet. In any case, there is a method of collecting and collecting magnetic metal chips with a magnet, and a typical method uses a magnet roll. When magnetic metal chips are to be adsorbed using a magnet roll, the magnetic metal chip collecting device forms a magnet roll by attaching a tile-shaped magnet to a cylindrical or solid roll surface with an adhesive or the like. By rotating the magnet roll, the chips are attached directly to the surface of the magnet roll or the decorative cylindrical case for protecting the surface of the magnet roll, and the chips are moved in the circumferential direction, and a scraper (scraper) etc. is moved near the end point of the chip movement. In general, a structure is used in which the chips are mechanically slid on the surface of the magnet roll or its decorative cylindrical case to scrape off the chips attached thereto. In addition, the magnet roll has a magnet structure in which the magnets are bonded in a cylindrical shape and the magnetizing force of a part in the circumferential direction is weakened. The non-magnetic material fixed to the magnet roll and arranged on the outer periphery on the concentric axis is fixed. There is also a magnetic metal chip collecting device having a structure in which a cylindrical case is rotated and a scraping plate is brought into contact with the surface of the cylindrical case to forcibly remove chips.

[0003] However, although there is a difference between rotating the magnet roll itself or rotating the concentric shaft-shaped outer peripheral cylindrical case, in any case, the structure for peeling and collecting the chips attached to the apparatus is mechanical. Since the peeling method is adopted, it is said that smooth chip recovery is hindered by pinching of chips into the scraping plate portion and mechanical wear of the scraping plate and the magnet roll or the outer peripheral non-magnetic cylindrical case surface. There's a problem. In addition, the size of the magnet roll is increased because the tile-shaped component magnets are bonded to each other in a cylindrical shape, so that the manufacturing work is troublesome, and there are problems in reliability and cost.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to provide a simple method for recovering magnetic metal chips with a magnet roll. An object of the present invention is to realize a highly reliable magnetic metal chip collecting apparatus having a magnet structure and capable of smoothly and efficiently adsorbing, peeling, and transporting chips. Another object of the present invention is to simplify the magnet structure, thereby facilitating the production, reducing the diameter of the magnet roll, and reducing the cost.

[0005]

Means for Solving the Problems and Action Therefor To achieve the above-mentioned object, a magnetic metal chip collecting apparatus of the present invention employs the following means. That is,
The magnetic metal chip recovery device of the present invention, as described in claim 1, in a device that collects and conveys magnetic metal chips using a magnet, in a round bar magnet in one or more directions in the diameter direction with a round bar magnet. By disposing a member having a magnetization direction in the non-magnetic outer cylinder through a certain gap, and rotating the round bar magnet in the fixed non-magnetic outer cylinder, the surface of the non-magnetic outer cylinder is rotated. A magnetic metal chip is collected as a chip adsorption surface and a transport path.

The thus configured chip collecting device is arranged by rotating a round bar magnet so that the magnetic field distribution generated on the surface is periodically changed on the surface of the material having the chip to be collected. Chips attracted by the attractive force of the magnet are attracted to the surface of the non-magnetic outer cylinder, and the chips can be moved and collected in synchronization with the rotating direction of the magnet. According to the above-described means, the round bar magnet can be applied to a metal magnet or a bonding magnet, and the production method can be mass-produced. Excellent in nature. Further, the diameter of the magnet roll can be reduced, and a small-diameter magnet roll of about 10 mmφ can be obtained. Furthermore, since no adhesive or the like is used, long life and low cost can be achieved.

[0007] Further, peeling of the chips adsorbed and conveyed on the surface of the non-magnetic outer cylinder is performed by welding or welding to the non-magnetic outer cylinder at the end point of the chip conveyance of the non-magnetic outer cylinder. It is desirable to provide the inclined plate that has been brought into contact, so that the chips are deposited on the inclined plate, and the chips are separated from the adsorption by the round bar magnet. With this configuration, the movement of the chips adsorbed and conveyed on the surface of the non-magnetic outer cylinder is prevented at the transfer end point of the non-magnetic outer cylinder by the inclined plate welded or brought into contact with the surface of the non-magnetic outer cylinder. However, the magnetic force applied to the chips due to the further rotation of the round bar magnet can be separated from the outer cylinder and deposited on the inclined plate portion. If necessary, transportation of the accumulated chips to the outside of the system can be performed by known transportation means.

[0008] The swarf collecting apparatus of the present invention is characterized by claim 3.
As described in above, the cooling medium may be circulated in the gap between the non-magnetic outer cylinder and the round bar magnet. Such a configuration is a high-temperature material, for example, hot rolled steel plate, in the case of collecting metal chips or iron oxide on hot flakes such as thick plates, cooling the round bar magnet and non-magnetic outer cylinder, It prevents the magnetism of the round bar magnet from deteriorating due to radiant heat from the steel material, and also prevents the magnetism from dropping due to an increase in the temperature of chips or iron oxide attached to the surface of the non-magnetic outer cylinder. Thereby, it becomes possible to recover chips or iron oxide on the high-temperature material. When recovering chips or iron oxide on a high-temperature material such as a hot piece of steel, it is preferable that the surface of the high-temperature material is also water-cooled or mist-cooled to such an extent that the magnetic properties of the chip and the iron oxide are recovered.

In the above description, the direction in which the chips are collected by the round bar magnet is set as the circumferential direction. However, when the chips are moved and collected in the axial direction of the round bar magnet, as described in claim 4, A spiral guide groove or guide wall is provided on the surface of the non-magnetic outer cylinder so that the round bar magnet and the non-magnetic outer cylinder are positioned such that the effective magnetic field of the round bar magnet disappears at the end of the guide groove or guide wall at the shaft end. To be placed. In the chip recovery device configured as described above, the chips adsorbed on the non-magnetic outer cylinder can be moved in the axial direction while spirally turning along the guide groove or the guide wall. Then, the movement of the swarf stops near the end of the shaft where the effective magnetic field of the round bar magnet disappears, and a part of the swarf deposited at the end point of the movement loses the attraction force and falls.
A collection box can be arranged at the drop position. Therefore, adsorption, conveyance, peeling, and collection can be realized by one round bar magnet.

[0010] In the present specification, magnetic metal chips are:
It is not limited to magnetic metal chips generated by a cutting machine or the like, and these are referred to as chips, including rust and iron powder adhering to the surface of a steel sheet in steel production and the like.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross-sectional magnetization direction of a round bar magnet 1 in a magnetic metal chip recovery device embodying the present invention. FIG. 1A shows the case where unidirectional magnetization is performed in the radial direction, FIG. 1B shows the case where two directions are applied, and FIG. 1C shows the case where four-direction magnetization is applied. Although the magnetization direction does not necessarily have to be equally divided in the circumferential direction as shown in the figure, the case of equal division is illustrated for ease of manufacture. FIG. 2 shows the state of magnetization of the round bar magnet 1 as a whole, taking the round bar magnet 1 that has undergone unidirectional magnetization as an example. The round bar magnet 1 is magnetized in the radial direction like a magnetization plane 2, and the direction of the magnetization is indicated by an arrow 3.

FIG. 3 is a cross-sectional view of the apparatus in the case where the chips 6 are collected by the round bar magnet 1 magnetized in two perpendicular directions. A non-magnetic outer cylinder 4 is wrapped around the outer periphery of the round bar magnet 1 so as to enclose it.
However, they are arranged on the concentric shaft via a gap 5 or a lubricant such as oil. The round bar magnet 1 is configured to be rotationally driven by a rotation driving unit (not shown) such as an electric motor.

Thus, such a chip collecting device is arranged on the surface of the material 7 on which the magnetic metal chips 8 to be collected are located, and the round bar magnet 1 is rotated at a constant speed by the driving means, and is generated on the surface. When the magnetic field distribution is periodically changed on the surface of the material 7, the magnetic metal chips 8 on the surface of the material 7 are attracted to the surface of the nonmagnetic outer cylinder 4 by the attractive force of the round bar magnet 1. In this case, the same adsorption effect can be obtained for the magnetic metal chips 8 whether the material 7 is a non-magnetic material or a magnetic material. The attracted magnetic metal chips 8 move on the surface of the nonmagnetic outer cylinder 4 in the circumferential direction by the magnetic field of the rotating round bar magnet 1.

It is necessary that the chip collecting device is provided with means for separating and collecting the magnetic metal chips 8 adsorbed. The chip separation / recovery means is provided with a tip being welded or brought into contact with the surface of the nonmagnetic outer cylinder 4 at a chip conveyance end point a set near the top of the nonmagnetic outer cylinder, and facing downward toward the rear end. It is constituted by an inclined plate 6 which is inclined. The movement of the magnetic metal chips 8 that are attracted to the surface of the non-magnetic outer cylinder 4 and move in the circumferential direction of the non-magnetic outer cylinder 4 with the rotation of the round bar magnet 1
As a result, the distance between the swarf 8 and the magnetization plane 2 of the round bar magnet 1 is increased, so that the magnetic force on the swarf 8 is weakened, and the swarf 8 is deposited on the inclined plate 6. The method of discharging the chips 8 from the inclined plate 6 to the outside of the system is realized by manual cleaning according to the generation frequency and properties of the chips 8 or by appropriately using existing transport means. If an upright portion 61 is provided at a necessary peripheral portion except at least the front edge of the inclined plate 6, the accumulated chips 8 can be prevented from overflowing from the plate 6 and dropping.

Next, FIG. 4 shows an embodiment in which the chip recovery device of the present invention is applied to a hot slab. In the case where the material 7 is a steel slab or the like, the temperature of the chips 8 is adjusted in advance by a water spray cooling device or a mist cooling device 9 upstream of the chip recovery device with respect to the moving direction of the material 7, that is, the steel material. Although the magnetism is reduced to lower the magnetism and the cuttings 8 are adsorbed to the non-magnetic outer cylinder 4 by the round bar magnet 1, in order to prevent the magnetic deterioration of the round bar magnet 1 due to radiant heat from the steel material 7, in the present embodiment, As shown in FIG. 4, an air gap 5 is provided between the round bar magnet 1 and the non-magnetic outer cylinder 4, and the air gap 5 is connected to a cooling medium supply device (not shown) to form a cooling medium passage. The cooling medium such as is forcedly circulated through the cooling medium passage.

FIG. 5 shows two implementations for conveying the chips 8 adsorbed on the fixed non-magnetic outer cylinder 4 in the axial direction of the non-magnetic outer cylinder 4 by rotation of the round bar magnet 1 to collect and remove the chips. The form is shown. In the embodiment shown in FIG.
A guide groove 10 having a necessary cross section corresponding to the size of the cutting powder 4 or the metal powder to be conveyed to the surface is spirally worked in the axial direction. The chips 8 are carried along the grooves 10 by the rotating magnetic field of the round bar magnet 1. The chip conveying end point a provided near the shaft end of the non-magnetic outer cylinder 4 and the magnetization end point b of the round bar magnet 1 substantially coincide with each other, and the depth of the groove 10 is temporarily or suddenly eliminated at that position. The chips 8 are deposited near the chip transport end point a of the non-magnetic outer cylinder 4 and fall sequentially, and fall into a chip collection box (not shown) arranged below the portion. The embodiment shown in FIG. 5B is basically the same as the embodiment shown in FIG. 5A, except that a spiral guide wall 11 is attached to the surface of the non-magnetic outer cylinder 4 instead of forming a groove. , Chips 8 into non-magnetic outer cylinder 5
Is transported in the axial direction. At the chip transport end point a,
By temporarily or suddenly eliminating the height of the guide wall 11, the chips 8 accumulate near the transport end point a of the non-magnetic outer cylinder 4, fall sequentially, and fall into a chip collection box (not shown).

[0017]

According to the magnetic metal chip recovery apparatus of the present invention, a general-purpose magnet having a round rod shape and being magnetized in the radial direction, whether a metal-based magnet or a bonding-based magnet, is used. It is possible to configure the surface of the non-magnetic outer cylinder as an adsorbing surface for chip and iron powder and as a transport path simply by using it, disposing it coaxially in a fixed non-magnetic outer cylinder and rotating it.
Compared to a conventional magnet roll formed by processing a tile-shaped magnet or a rectangular magnet and bonding a large number of cylinders or cylinders, the size and weight of the magnet roll can be reduced and the cost can be reduced. When the size of the chips is small, it is possible to increase the transfer capacity by increasing the magnetization direction. On the other hand, when the diameter of the round bar magnet is small, a relatively large chip may not be conveyed by increasing the magnetization direction. This is because the other magnetized portion that has undergone the division magnetization stops the chips more quickly than the chips are moved by the rotating magnetic field. Since this phenomenon is caused by the magnetic field distribution and the surface shape of the chips, the problem can be solved by using a round bar magnet having a diameter sufficiently larger than the size of the chips.

Further, according to the present invention, it is possible to manufacture a small-diameter round bar magnet having a diameter of about 10 mmΦ. It can also be applied to the removal of minute chips and iron powder in a narrow space that could not be applied with a magnet roll. In addition, since the structure is simple and the weight can be reduced, it is easy to use it for removing chips and iron powder on a high-temperature material by cooling the inside with water.

Since a plurality of round bar magnets are magnetized in the radial direction, N is adjacent to the surface of the round bar magnet near the surface of the chip.
Since the lines of magnetic force are applied in parallel to the swarf at the pole and the S pole, the swarf adheres well regardless of whether the underlying material is magnetic or non-magnetic. This means that chips, iron powder,
It is possible to recover iron oxide and the like, which can contribute to quality improvement of steel products.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing the state of magnetization in the radial direction in the cross section of a round bar magnet for each number of magnetization directions, where (a) shows one direction of magnetization, (b) shows two directions, and (c) shows ) Shows the case of four directions.

FIG. 2 is a perspective view for explaining a magnetization direction of a round bar magnet when unidirectional magnetization is performed.

FIG. 3 is a cross-sectional view showing an embodiment of a magnetic metal chip recovery apparatus of the present invention, in which a round bar magnet having two-way magnetization is used.

FIG. 4 is an explanatory view showing an embodiment in which the magnetic metal chip recovery device of the present invention is applied to the recovery of chips and iron powder on the surface of a high-temperature material.

5A and 5B are explanatory views showing an embodiment in which chips are conveyed in the axial direction by a round bar magnet, wherein FIG. 5A shows a state in which a groove is formed on the surface of a non-magnetic outer cylinder, and FIG. The state which provided the guide wall is shown.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Round bar magnet 2 ... Magnetization plane 3 ... Magnetization direction arrow 4 ... Non-magnetic outer cylinder 5 ... Air gap 6 ... Inclination plate (magnetic metal chip separation and recovery means) 7・ ・ ・ Material 8 ・ ・ ・ Magnetic metal chips 9 ・ ・ ・ Sprinkling cooling pipe or mist cooling device 10 ・ ・ ・ Guide groove 11 ・ ・ ・ Guide wall a ・ ・ ・ End point of chip transportation b ・ ・ ・ End point of magnetization

Claims (4)

[Claims] An apparatus for recovering and transporting magnetic metal chips by using a magnet, wherein a round bar magnet having one or more magnetization directions in the diameter direction thereof is placed in a non-magnetic outer cylinder. By arranging through a certain gap and rotating the round bar magnet in the fixed non-magnetic outer cylinder, the surface of the non-magnetic outer cylinder is used as a metal chip adsorbing surface and a magnetic metal chip as a transport path. An apparatus for collecting magnetic metal swarf, wherein the apparatus collects swarf. 2. The magnetic metal chip collecting apparatus according to claim 1, further comprising an inclined plate welded or brought into contact with the non-magnetic outer cylinder at a chip conveying end point near the top of the non-magnetic outer cylinder. A magnetic metal chip collecting device, characterized in that chips are deposited by the method and the chips are peeled off from being attracted by the round bar magnet. 3. The magnetic metal chip recovery device according to claim 1, wherein a cooling medium is circulated in a gap between the non-magnetic outer cylinder and the round bar magnet to cool the magnetic metal chip. Metal chip recovery equipment. 4. A magnetic metal chip collecting device according to claim 1, wherein a spiral guide groove or a guide wall is provided on the surface of the non-magnetic outer cylinder, and the round bar magnet and the non-magnetic outer cylinder are used as shafts. By disposing the effective magnetic field of the round bar magnet at the end point of the guide groove or the guide wall at the end, it is possible to separate and collect the chips from the suction by the round bar magnet at the end point of the guide groove or the guide wall. Characteristic magnetic metal chip recovery device.