JP2010234486A - Surface shaving device for metal plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface shaving device capable of making cutting oil hit a machining point exactly while sufficiently removing cutting chips adherent to a cutter. <P>SOLUTION: The surface shaving device includes: a columnar slab cutter 2; a drive means for rotating the slab cutter; a back-up roll 5 opposite to the slab cutter; a pair of inlet guide rollers 6; an inlet guide 10; a pair of outlet guide rollers 7; an outlet guide 11; a spray mouth 8 for the cutting oil; and a dust-collecting hood 4 for sucking the cutting chips. The dust-collecting hood is not made into such a configuration that the circumference of the cutter is completely covered and has an opening at a cut-in side having the spray port for the cutting oil. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a chamfering device that continuously cuts the surface of a metal plate, and more particularly to a chamfering device that continuously cuts the surface of a thick plate after hot rolling.

  In the process of manufacturing metal products such as strips, plates and foils, particularly at the stage of planks, to smooth the unevenness on the surface, to remove oxide scale formed on the surface, and / or Often a chamfering device is used to remove dirt and clean it. For example, in the manufacturing process of a wrought copper product, an ingot is melted and cast, and then hot rolled to form a long plate having a thickness of about 10 mm. At this time, the oxidized scale formed on the surface is not pickled, but by continuously chamfering using a chamfering device installed in the middle of the continuous line, a smooth and clean surface is obtained. After obtaining, the process proceeds to the next step, such as cold rolling.

  In this chamfering process, as shown in FIG. 3, when the metal plate 1 is continuously fed in the direction of the arrow, first, both sides of the metal plate are shaved by the milling cutter 14, and then the slab cutter 2 is used. In general, the lower surface and the upper surface are cut in order. The slab cutter 2 is installed in pairs with a backup roll 5 for supporting a metal plate. Before and after the slab cutter 2, feed rolls 15 for continuously conveying the metal plate are installed. Chips generated during chamfering are collected by suction or the like, and reused as a raw material for melting.

  Since this step is performed in a continuous line, it is important to quickly remove generated chips. When the generated chips are not removed and are attached around the cutter, chamfering is hindered and a smooth surface cannot be obtained. Since the cutter rotates and chamfers the traveling metal plate, it is ideal that the chips are completely removed every rotation. For this reason, in such a chamfering process for a thick plate, it is common to surround the slab cutter 2 with a dust hood 4 and suck the generated chips (see FIG. 2). Such a dust suction mechanism is also described in Patent Documents 1 to 3. In order to sufficiently remove the generated chips, it is desirable that the suction force in the hood is high.

JP 7-276125 A JP-A-7-276126 JP-A-8-309610

  Moreover, since the cutting edge of a slab cutter has heat at the time of chamfering, it is common to inject cutting oil to a processing point. Specifically, a spray port 8 for the cutting oil is arranged on the cutting side of the slab cutter 2 (on the outlet side (downstream side in the case of up-cutting) and on the inlet side (upstream side in the case of down-cutting)). Cutting oil is sprayed toward (see FIG. 2).

  However, in the conventional dust suction mechanism, it has been difficult for the injected cutting oil to successfully hit the processing point. As mentioned above, since a strong suction force is acting on the metal plate in the dust hood, the trajectory of the injected cutting oil is deviated and sucked into the dust hood while slightly rubbing with a slab cutter. It ends up. On the other hand, if the suction force is reduced, the chips are not removed while adhering to the blade of the cutter, and wear of the cutter is accelerated.

  That is, in the prior art, it has been difficult to achieve both the two propositions of sufficiently removing the chips adhering to the cutter and causing the cutting oil to hit the processing point. In particular, in so-called difficult-to-cut materials that have high cutting resistance and are likely to adhere to the blade of the cutter, the cutting edge is extremely worn, so if the cutting oil supply is insufficient, the replacement frequency of the cutter will increase and workability will be increased. There was a problem of being forced to decline.

  To cope with such a problem, a conventional countermeasure has been to pour a large amount of cutting oil just like a ridge. Cutting edge wear due to cutting is greatly affected by processing heat and workpiece adhesion, but in order to effectively suppress these, it is necessary to accurately hit the cutting point with the cutting oil as described above. is there. Thereby, the frictional heat when the cutting edge comes into contact with the workpiece can be suppressed, and since the processing heat is transmitted to the cutting edge through the cutting oil during cutting, the amount of heat applied to the cutting edge itself can be suppressed.

  In the prior art, since such a cutting mode cannot be obtained, in order to remove the heat received by the cutter during the cutting, a method of cooling with a large amount of cutting oil was taken. As described above, when a large amount of cutting oil is used, not only the cost is increased, but the following problems are newly generated. As described above, the generated chips are reused as a melting raw material, but cannot be used as a melting raw material if a large amount of cutting oil remains attached. That is, it is obvious that a steam explosion occurs when the wet chips are dissolved. In the dry state, the furnace material will be damaged. Therefore, it is used after being dried, but in the case of air drying, a large amount of place and time are required. If it cannot be secured, a dedicated hot air dryer is required.

  Further, even if the moisture is completely removed, the S component normally contained in the cutting oil remains attached in a considerable amount, so that when it is used as a melting raw material, an ingot having a high S content is formed. For example, copper alloys are used for applications such as connectors and lead frames, but S is an element that significantly impairs the properties of the characteristics when copper alloys are used for such applications. Therefore, it is desirable to use less cutting oil in consideration of using chips as a melting raw material.

  On the other hand, in some cutting operations such as drilling, MQL (Minimum Quantity Lubricant) processing that suppresses the use of cutting oil as much as possible has become widespread in recent years due to environmental considerations, but due to the circumstances described above, MQL processing has been considered difficult in cutting metal thick plates.

  Then, this invention makes it a subject to provide the chamfering apparatus which solves the said problem. Specifically, it is an object of the present invention to provide a chamfering device capable of accurately hitting a cutting point with cutting oil while sufficiently removing chips adhering to the cutter.

  In order to solve the above problems, the present inventor considered that it is necessary to separate the flow of the air flow for sucking the chips and the flow of the air flow for spraying the cutting oil. From this point of view, as a result of reviewing the basic structure of the cutter stand, the hood that sucks the chips is not designed to completely cover the periphery of the cutter. It was found that it is effective to provide That is, in the open part where the cutter is exposed to the outside from the hood, the suction force from the hood is smaller than in the conventional structure, so the cutting oil fired toward the processing point in the open part reaches the processing point. Without having to change the trajectory greatly before, hit the machining point accurately.

The present invention completed on the basis of the above knowledge is, in one aspect, a chamfering device for continuously chamfering a traveling long metal plate,
A cylindrical slab cutter having a plurality of cutting blades for chamfering a metal plate on the surface and having a central axis parallel to the width direction of the metal plate,
Drive means for rotating the slab cutter;
A backup roll facing the slab cutter across the metal plate;
Adjacent to the upstream side of the slab cutter, and at least a pair of entry-side guide rollers disposed so as to sandwich the metal plate; and
An entry-side guide that supports the entry-side guide roller;
Adjacent to the downstream side of the slab cutter, and at least a pair of exit guide rollers arranged to face each other so as to sandwich the metal plate;
An exit guide for supporting the exit guide roller;
Cutting oil for spraying cutting oil on the contact portion between the slab cutter and the metal plate, provided on the exit guide when chamfering is an upper cut, and on the entry guide when chamfering is downcut A spray port;
Surrounding the slab cutter, equipped with a dust hood for sucking chips generated during chamfering,
The dust suction hood has an open portion between the outlet guide and the inlet guide provided with the cutting oil spray port, and is closed with the one not provided with the cutting oil spray port. This is a connected chamfering device.

  In one embodiment of the chamfering device according to the present invention, the lower end on the open side of the dust hood is close to the slab cutter so as to reduce the airflow sucked into the dust hood.

  In another embodiment of the chamfering apparatus according to the present invention, the lower end of the dust hood on the open part side is above the central axis of the slab cutter.

  In still another embodiment, the chamfering device according to the present invention has an airflow blocking member that extends on the inner wall or the lower end of the dust hood on the open portion side so as to approach or contact the slab cutter.

  In another embodiment of the chamfering device according to the present invention, another guide for spraying the cutting oil toward the central axis of the slab cutter is provided by the guide on which the cutting oil spraying port is provided. An oil spray port is further provided.

  According to the present invention, since the flow of the air flow for sucking the chips and the flow of the air flow for spraying the cutting oil are separated, the cutting oil is accurately hit the processing point while sufficiently removing the chips adhering to the cutter. It becomes possible to make it. As a result, cutter wear is suppressed, and the life of the cutter is extended. In addition, the amount of cutting oil used can be reduced while obtaining good surface quality. Further, MQL processing can be applied.

It is a side view showing one embodiment of a chamfering device concerning the present invention. It is a side view which shows the conventional chamfering apparatus. It is a figure which shows the schematic procedure of the chamfering process of a metal plate.

  A preferred embodiment of the present invention will be described with reference to FIG. FIG. 1 is a side view schematically illustrating a state in which a top surface of a long metal plate 1 continuously running from the left side to the right side of a paper surface at a predetermined speed is chamfered by the chamfering device according to the present invention. The metal plate 1 that has traveled passes through the entrance guide roller 6 arranged in a pair in the vertical direction, and then undergoes chamfering on the upper surface when passing between the slab cutter 2 and the backup roll 5. The chamfered metal plate passes through the exit guide roller 7 and is sent to the next process. Chips generated during chamfering are sent to a dust suction duct (not shown) connected above the dust suction hood 4. The outlet guide 11 is provided with a cutting oil spray port 8 from which cutting oil is sprayed.

  Although there is no restriction | limiting in particular in the material of the metal plate 1, Copper, a copper alloy, a high nickel alloy, an aluminum alloy etc. are mentioned. In a typical example, the metal plate 1 is a thick plate of copper or copper alloy after hot rolling. The thickness and width of the metal plate to be chamfered are not particularly limited, but in the case of a copper alloy hot rolled plate, the thickness is generally about 5 to 20 mm and the width is generally 500 to 1000 mm.

  The metal plate 1 that has traveled at a predetermined speed passes between the metal plate 1 while being sandwiched between the entrance guide rollers 6 that are arranged in pairs. The entry side guide roller 6 plays a role of adjusting the pass line. The entry-side guide roller 6 is a columnar member that is rotatably supported by the entry-side guide 10 via a shaft (not shown) extending in the width direction of the metal plate and rotates as the metal plate 1 travels. . The entrance-side guide roller 6 supported by one shaft can be formed into a short-axis columnar shape, and a plurality of the entrance-side guide rollers 6 can be arranged along the shaft axis at regular intervals, extending to the entire width of the metal plate 1. Alternatively, one long cylindrical column can be arranged. The material of the entry side guide roller 6 is not limited, but is generally austenitic stainless steel from the viewpoint of maintenance and cost, and the material of the entry side guide is not limited, but is generally die steel from the viewpoint of rigidity.

  The metal plate 1 passes between the adjacent slab cutter 2 and the backup roll 5 after exceeding the entry side guide roller 6. The upper surface of the metal plate 1 is chamfered by the slab cutter 2 during this time. The slab cutter 2 has a plurality of cutting blades on the surface and has a cylindrical shape having a central axis parallel to the width direction of the metal plate 1. The slab cutter 2 is supported by a cutter stand (not shown), and the traveling metal plate 1 is continuously chamfered by being rotated at a predetermined rotational speed by a driving means (not shown) such as a motor. be able to. The rotation direction of the slab cutter 2 is not particularly limited. When the cutting blade is rotated against the traveling direction of the metal plate 1, an upper cut is formed, and when the cutting blade is rotated in the traveling direction of the metal plate, a down cut is performed. However, in the case of down cut, an appropriate brake mechanism is necessary for the feed roller so that the metal plate does not travel faster than necessary, and the chips 3 generated during cutting are clogged between the outlet guide 11 and the metal plate 1. Upper cut is preferred because it becomes easier. FIG. 1 shows the case of chamfering by upper cutting.

  A plurality of cutting blades attached to the surface of the slab cutter 2 are generally fixed to the entire surface of the slab cutter 2 in a spiral shape from the viewpoint of cutting efficiency and surface quality. Specific examples of the arrangement of the cutting blades are described in, for example, Japanese Patent Application Laid-Open No. 7-276126, the entire contents of which are incorporated herein by reference. Any known material known to those skilled in the art may be used as the cutting blade, but a carbide blade mainly composed of tungsten carbide is generally used from the viewpoint of cutting performance and durability.

  An exit guide 11 for stabilizing the pass line after cutting is adjacent to the downstream of the slab cutter 2, and the exit guide 11 applies cutting oil to a contact portion (processing point) between the slab cutter 2 and the metal plate 1. A cutting oil spraying port 8 for spraying is provided. The cutting oil spray port 8 is connected to a cutting oil supply source (not shown) via a cutting oil supply path 12. The cutting oil spray port 8 is directed to the machining point, and is jetted at a sufficient pressure so that the cutting oil reaches the machining point accurately. A plurality of cutting oil spray ports 8 are typically arranged in parallel across the width direction of the metal plate 1. The cutting oil spraying port 8 is preferably installed as close as possible to the processing point so as not to be affected by the suction force from the dust suction duct. For example, the cutting oil spraying port 8 is preferably installed below the central axis of the slab cutter 2, and more preferably installed below half the height from the lower end of the slab cutter to the central axis.

  The cutting oil spray port may be in one direction toward the processing point, but may further include another cutting oil spray port 13 for spraying the cutting oil toward the central axis of the slab cutter 2. Thereby, the influence of the circumferential airflow generated along with the rotation of the slab cutter 2 along with the airflow in the direction of the dust suction duct is weakened, and the cutting oil ejected from the cutting oil spray port 8 is less susceptible to the airflow. , It will reach the processing point more accurately. In FIG. 1, the cutting oil supply passage 12 is branched to enable spraying in two directions. In the case of down-cutting, the cutting oil spray port 8 is provided in the entry side guide.

  Further, the exit side guide 11 supports the exit side guide roll 7, and the metal plate 1 that has traveled after chamfering is sandwiched between the exit side guide rollers 7 that are arranged in a pair vertically, Pass through. The exit guide roller 6 plays a role of adjusting the pass line after cutting. The material, shape and arrangement of the exit side guide roller 7 are the same as those of the entrance side guide roller 6.

  A large amount of chips 3 are continuously generated during chamfering. In order to obtain a smooth finished surface, it is necessary to quickly remove it with a sufficient suction force. In order to realize this, the slab cutter 2 is surrounded by a dust hood 4, and the chips 3 pass through a dust suction duct (not shown) connected to the upper side of the dust hood 4, so that a centrifuge, a dryer, etc. After removing the oil via, the space density is increased by a press shaping machine, and finally the scrap for melting raw material is obtained. At this time, the cutting oil sucked together with the cutting powder 3 passes through the above-mentioned centrifuge, and further removes fine sludge-like metal powder by a filter, thereby facilitating reuse of the cutting oil. The cutting oil that has not been sucked together with the chips is once collected in the pits below the line, and then fine metal powder is removed by a filter and transferred to an area called a clean tank where cutting oil awaiting reuse is stored. Is done. The material of the dust hood 4 is not limited, but is generally austenitic stainless steel from the viewpoint of maintenance.

  On the other hand, when the slab cutter 2 is completely surrounded by the dust hood 4, the trajectory of the cutting oil sprayed from the cutting oil spray port 8 is deflected toward the dust suction duct by the suction force from the dust suction means, so Accurate injection becomes difficult. Therefore, in the present invention, the dust hood 4 includes the cutting oil of the outlet guide and the inlet guide so that the flow of the air flow for sucking the chips and the flow of the air flow for spraying the cutting oil are separated. An open portion is provided between the one provided with the spray port and the one not provided with the cutting oil spray port is connected in a closed manner. In FIG. 1, since the cutting oil spray port 8 is provided in the outlet guide 11, the dust hood 4 is closedly connected to the inlet guide 10, but not connected to the outlet guide. Or even if it connects, it is partial, Therefore The opening part is provided between the exit side guides. Therefore, the suction force from the dust suction means is the side where the cutting oil spraying port is provided (the downstream side of the slab cutter 2 in FIG. 1) rather than the side where the chips are generated (the upstream side of the slab cutter 2 in FIG. 1). This is relatively weak, and the cutting oil sprayed from the cutting oil spray port 8 is less likely to be directly sucked into the dust suction duct.

  In order to more effectively prevent the cutting oil sprayed from the cutting oil spraying port 8 from being sucked into the suction duct, the lower end on the open side of the dust hood 4 is brought as close to the slab cutter 2 as possible. It is good. Thereby, since the airflow which flows into the dust hood 4 through the said open part from the outside reduces, cutting oil becomes difficult to be attracted | sucked by the suction duct. However, if the lower end of the open side of the dust hood 4 comes into contact with the slab cutter 2, noise, friction, etc. are generated, which hinders operation, and should be avoided.

  It is also effective to separate the lower end of the dust hood 4 on the open part side from the cutting oil spray port 8 as much as possible. Thereby, the influence which the cutting oil sprayed from the cutting oil spraying port 8 receives from the airflow which flows in the dust hood 4 through the said open part from the outside can be suppressed. In a preferred embodiment, the lower end of the open side of the dust hood 4 is above the central axis of the slab cutter, and in a more preferred embodiment, the lower end of the open side of the dust hood 4 is the central axis of the slab cutter 2. To the upper end of the slab cutter 2 above the half of the height. In a typical embodiment, the lower end of the dust hood 4 on the open side is between the central axis of the slab cutter 2 and the upper end of the slab cutter 2.

  In another preferred embodiment, an airflow blocking member extending so as to be close to or in contact with the slab cutter 2 is installed on the inner wall or the lower end of the dust hood 4 on the open part side. Thereby, the influence which the cutting oil sprayed from the cutting oil spraying port 8 receives from the airflow which flows in the dust hood 4 through the said open part from the outside can be suppressed. The airflow blocking member should be made of a material that can effectively block the airflow. Hard materials such as metal, ceramics, plastics, and carbon are effective. Since there is a risk of encouraging, a soft material such as sponge or rubber having a thickness enough to withstand airflow is preferable. From the viewpoint of blocking the airflow, the airflow blocking member is preferably in contact with the slab cutter 2. Resin such as nylon, polypropylene, polyvinyl chloride, PFA (copolymer of tetrafluoroethylene (TFE) and perfluoroalkoxyethylene), for example, when it is brought into contact with the slab cutter so as not to be damaged. A sealing brush made of a material is preferred. In FIG. 1, a sealing brush 9 is extended on the inner wall near the lower end of the open portion side 4 of the dust suction hood so as to contact the slab cutter 2. However, it should be noted that excessively high contact pressure will cause adverse effects such as friction and noise. Of course, the sealing brush 9 can be used in close proximity without being brought into contact therewith.

  The embodiment in the case of chamfering the upper surface of the metal plate has been described above with reference to FIG. 1, but when the lower surface of the metal plate is chamfered, the chamfering device according to the present invention is used upside down. do it.

DESCRIPTION OF SYMBOLS 1 Metal plate 2 Slab cutter 3 Chip 4 Dust absorption hood 5 Backup roller 6 Entrance guide roller 7 Exit guide roller 8 Cutting oil spraying port 9 Sealing brush 10 Entrance guide 11 Exit guide 12 Cutting oil supply path 13 Cutting oil Spray port 14 Milling cutter 15 Feed roll

Claims (5)

A chamfering device for continuously chamfering a traveling long metal plate,
A cylindrical slab cutter having a plurality of cutting blades for chamfering a metal plate on the surface and having a central axis parallel to the width direction of the metal plate,
Drive means for rotating the slab cutter;
A backup roll facing the slab cutter across the metal plate;
Adjacent to the upstream side of the slab cutter, and at least a pair of entry-side guide rollers disposed so as to sandwich the metal plate; and
An entry-side guide that supports the entry-side guide roller;
Adjacent to the downstream side of the slab cutter, and at least a pair of exit guide rollers arranged to face each other so as to sandwich the metal plate;
An exit guide for supporting the exit guide roller;
Cutting oil for spraying cutting oil on the contact portion between the slab cutter and the metal plate, provided on the outlet guide when chamfering is an upper cut, and on the inlet guide when chamfering is downcut A spray port;
Surrounding the slab cutter, equipped with a dust hood for sucking chips generated during chamfering,
The dust suction hood has an open portion between the outlet guide and the inlet guide provided with the cutting oil spray port, and is closed with the one not provided with the cutting oil spray port. Connected chamfering device.   The chamfering device according to claim 1, wherein a lower end of the dust hood on an open portion side is close to the slab cutter so as to reduce an air flow sucked into the dust hood.   The chamfering device according to claim 1 or 2, wherein a lower end of the dust hood on the open part side is above a center axis of the slab cutter.   The chamfering device according to any one of claims 1 to 3, further comprising an airflow blocking member extending on an inner wall or a lower end of the dust hood on an open portion side so as to approach or abut against the slab cutter.   The guide in which the said cutting oil spraying opening is provided further comprises another cutting oil spraying opening for spraying cutting oil toward the center axis | shaft of the said slab cutter. Chamfering equipment.