JP2022044085A - Cutting device for resin-coated metal member - Google Patents

Abstract

To provide a simple cutting device that can produce a resin-coated metal member of high quality by preventing burn and fuzz of a resin part of the resin-coated metal member (workpiece) and an occurrence of a metal burr.SOLUTION: A cutting device for a resin-coated metal member includes: a movable cutter 10 having a first cutting edge 11 and a second cutting edge 12 with respective predetermined cutting-edge angles; a fixed cutter 20 having a single blade and having a fixed cutting edge 21 with a predetermined cutting-edge angle; a support shaft portion 32 capable of abutting on a locking portion of the movable cutter; a guide portion 31 that guides movement of the movable cutter; and a work receiving portion. The first cutting edge is configured to have a predetermined inclination angle in a direction away from the fixed cutting edge, and the second cutting edge and the fixed cutting edges are configured to face each other. Cutting of a workpiece W is performed by a first cutting process in which the movable cutter moves and the locking portion 13 abuts on the support shaft portion and a second cutting process in which, using the support shaft portion as a rotating axis, the movable cutter rotates in a direction close to the fixed cutter.SELECTED DRAWING: Figure 3

Description

The present invention relates to a cutting device for a resin-coated metal member.

As a cutting device for a resin-coated metal member, for example, a cutting device for a medical thin-walled tube described in Patent Document 1 is known. This cutting device crosses a thin-walled tube as a work. The work is placed between the pair of rollers and the circular cutter. Cross-cutting of the work is performed by pressing a circular cutter (blade) against the work while rotating the work with a pair of rollers. In this cutting device, the work is prevented from being crushed by inserting the core rod into the hollow portion of the work. Further, this cutting device prevents the generation of burrs on the cut surface of the work by rotating both the work and the cutting blade of the circular cutter. The thin-walled tube to be the work has, for example, an outer diameter of 5 mm to 15 mm and a wall thickness of 0.1 mm to 2.0 mm, and the material thereof is a semi-hard resin such as polyethylene, polypropylene, or polyvinyl chloride.

Japanese Unexamined Patent Publication No. 10-179743

In recent years, thin-walled tubes (resin-coated metal tubes) in which a metallic core material is coated with a resin have been provided. For example, in a resin-coated metal tube, a core material obtained by spirally forming a thin metal strip is coated with resin. For example, in the resin-coated metal tube, both the inner peripheral side and the outer peripheral side of the core material are coated with the same quality resin. For example, in the resin-coated metal tube, both the inner peripheral side and the outer peripheral side of the core material are coated with resins different from each other. Since the resin-coated metal tube having such a metallic core material has sufficiently high strength, it is more difficult to cross the tube as compared with the conventional thin-walled tube (see Patent Document 1). Further, in the case of a conventional cutting device (see Patent Document 1), if a blade suitable for a single material (semi-hard resin) constituting the work is selected, problems such as burning and fluffing of the cut surface can be prevented. .. However, in the case of the resin-coated metal tube described above, due to the coexistence of the hard core material (metal part) and the soft coated resin (resin part), compared with the conventional thin-walled tube made of a single material. , Crossing has become especially difficult.

For example, when crossing a resin-coated metal tube to be a work, it is necessary to select a blade suitable for the hard metal part in order to reliably cut the hard metal part. When cutting the work, friction is generated between the blade and the work, and it is generally considered that the frictional heat generated at this time is larger for the blade that is not suitable for the material to be cut. That is, it is considered that the frictional heat generated when cutting the work is generated more in the resin portion due to the use of the blade suitable for the hard metal portion. Therefore, when a blade suitable for a hard metal portion is used, burning or fluffing may occur on the cut surface of the resin portion of the work. On the other hand, if a blade suitable for the soft resin portion is selected, it is considered that the resin portion can be prevented from burning or fluffing. However, when cutting the metal part of the work, the blade is damaged , the metal part cannot be cut, or burrs (metal burrs) are formed on the cut surface of the metal part due to the use of a blade suitable for the soft resin part. There is a risk of problems such as occurrence. The metal burrs do not fall off but bite into the cut surface of the resin portion and remain, or fall off and bite into the surface of the resin portion and remain, which causes quality deterioration of the resin-coated metal tube.

An object of the present invention is to prevent burning, fluffing, and metal burrs of the resin portion when the resin-coated metal member such as the resin-coated metal tube described above is crossed, and to produce a high-quality resin-coated metal member. , To provide a cutting device with a simple configuration.

The inventors examine in detail the behavior when the resin-coated metal tube to be the work is crossed, and introduce the idea of selecting a cutting tool shape and a cutting method suitable for each of the metal part and the resin part constituting the work. As a result, it was found that the above-mentioned problems could be solved, and the present invention could be reached.

The cutting device according to the present invention is a cutting device using a resin-coated metal member whose metal portion is covered with a resin portion as a work, and has a linear first cutting edge having a cutting edge angle of 5 degrees or more and 40 degrees or less. It has a movable blade having a single-edged blade having a linear second cutting edge angle of 60 degrees or more and less than 90 degrees, and a single-edged blade having a linear fixed cutting edge having a cutting edge angle of 60 degrees or more and 90 degrees or less. It is provided with a fixed blade, a support shaft portion capable of contacting a locking portion provided on the movable blade, a guide portion for guiding the movement of the movable blade, and a work receiving portion on which the work is installed. The first cutting edge is configured to have an inclination angle of 5 degrees or more and 30 degrees or less in a direction away from the fixed cutting edge, and the second cutting edge and the fixed cutting edge are configured to face each other, and the work. The cutting is the first cutting process until the movable blade moves toward the work and the locking portion abuts on the support shaft portion, and the movable blade is fixed with the support shaft portion as a rotation axis. It is performed by a second cutting process that rotates in a direction close to the cutting tool, and in the first cutting process, cutting of the resin portion of the work by the first cutting edge is started, and in the second cutting process, with the second cutting edge. Cutting of the work by meshing with the fixed cutting edge is completed.

In the cutting device according to the present invention, it is preferable to install the work in the work receiving portion so that the work can be swung by contact with the first cutting edge of the movable blade.

In the cutting device according to the present invention, the work may be a metal strip having a spiral metal portion. In this case, the cutting device according to the present invention positions the work in the work receiving portion so that the extending direction of the spiral gap of the metal strip matches the extending direction of the fixed cutting edge. Is preferable.

According to the present invention, when a resin-coated metal member such as the resin-coated metal tube described above is crossed, it is possible to prevent the resin portion from burning, fluffing, and metal burrs, and to produce a high-quality resin-coated metal member. , A cutting device having a simple configuration can be provided.

It is an example of a resin-coated metal member, and is a figure schematically showing a resin-coated metal tube having a cylindrical end face (cut surface). It is an example of a resin-coated metal member, and is a figure schematically showing a resin-coated metal flat line having a quadrangular end face (cut surface). It is an example of the embodiment of the cutting apparatus which concerns on this invention, and is the figure which shows the state which the work W shown in FIG. 1 is a cutting target, and the movable blade is stopped at the standby position (X2 side). FIG. 3 is a view of the cutting device shown in FIG. 3 as viewed from the X1 side, and is a view including a partial cross section. It is a figure which shows the cross section of the 1st cutting edge of the movable blade shown in FIG. 3 partially enlarged. It is a figure which shows the cross section of each of the 2nd cutting edge of the movable cutting object and the fixed cutting edge of a fixed cutting object shown in FIG. 3 in a partially enlarged manner. In the figure shown for demonstrating the first cutting process, the movable blade moves from the standby position (X2 side) toward the work W (moves to the X1 side), and the first cutting edge of the movable blade is the resin of the work W. It is a figure which shows the state which started the cutting of a part. It is a figure which shows for demonstrating the 1st cutting process, and is the figure which shows the state which the movable blade has moved further to the X1 side. It is a figure shown for demonstrating the 2nd cutting process. It is a figure which shows the state which was done. FIG. 3 is a diagram showing a state in which the work W shown in FIG. 2 is targeted for cutting and the movable blade has reached the same position as in the case shown in FIG. 8 in the first cutting process.

The cutting device according to the present invention is a cutting device using a resin-coated metal member whose metal portion is covered with a resin portion as a work, and can cross the work.

The cutting device according to the present invention includes a linear first cutting edge having a cutting edge angle of 5 degrees or more and 40 degrees or less, and a linear second cutting edge having a cutting edge angle of 60 degrees or more and less than 90 degrees with a single blade. A movable blade having a right angle is provided.

The cutting device according to the present invention includes a fixed blade having a linear fixed blade with a single-edged blade having a blade angle of 60 degrees or more and 90 degrees or less.

The cutting device according to the present invention includes a support shaft portion capable of contacting a locking portion provided on the movable blade, a guide portion for guiding the movement of the movable blade, and a work receiving portion on which the work is installed. ..

The first cutting edge of the movable blade is configured to have an inclination angle of 5 degrees or more and 30 degrees or less in a direction away from the fixed cutting edge of the fixed blade.

The second cutting edge of the movable blade and the fixed cutting edge of the fixed blade are configured to face each other.

The work is cut by the cutting device according to the present invention in the first cutting process until the movable blade moves toward the work and the locking portion abuts on the support shaft portion, and the movable blade uses the support shaft portion as a rotation axis. It is performed by a second cutting process that rotates in a direction close to the fixed cutting tool. In the first cutting process, cutting of the resin portion of the work by the first cutting edge is started, and in the second cutting process, the second cutting edge and the fixed cutting edge are used. Cutting of the work by meshing is completed.

Hereinafter, an example of the embodiment of the cutting apparatus according to the present invention will be described with reference to the drawings as appropriate, with reference to specific examples of the resin-coated metal member to be cut. The cutting device and the cutting object according to the present invention are not limited to the configurations exemplified here, but are indicated by the scope of claims, and all changes within the meaning and scope equivalent to the scope of claims are made. It is reasonable to understand that it is included. Unless otherwise specified, the embodiment of the resin-coated metal member cutting device according to the present invention is referred to as a "cutting device", and the resin-coated metal member to be cut is referred to as a "work". In addition, the names of the parts constituting the cutting device and the work and the codes attached to the parts are shared unless otherwise specified.

First, FIGS. 1 and 2 show specific examples of a resin-coated metal member serving as a work of the cutting device according to the present invention.

The work W shown in FIG. 1 is an example of a resin-coated metal member, and is a resin-coated metal tube (thin-walled tube) having a cylindrical end face (cut surface). The work W is composed of a core material Wm and a resin portion Wp that covers the core material Wm. The resin portion Wp is composed of a first resin portion Wp1 and a second resin portion Wp2. The work W has a wall thickness of, for example, 0.1 mm or more and 2 mm or less. The work W has an outer diameter of, for example, 1.5 mm or more and 15 mm or less. This work W may be used, for example, as a guide tube for a medical catheter wire, an outer tube for noise suppression or moisture proofing for electrical wiring or communication, or the like. The work W corresponds to the work W shown in FIGS. 3 to 9 described later.

The core material Wm is a metal portion constituting the work W. The core material Wm is formed by spirally forming a metal strip made of stainless steel for spring or the like. The spiral shape of the core material Wm has, for example, an outer diameter of more than 1.5 mm and less than 15 mm, and a pitch of 0.5 mm or more and 5 mm or less. It is preferable to use a movable blade 10 having a thickness suitable for this pitch, for example, a movable blade 10 having a dimension (thickness) in the Y direction of a portion in contact with the work W of 0.5 mm or more and 5 mm or less. The metal strip to be the core material Wm has, for example, a thickness of 0.01 mm or more and 1.8 mm or less, and a width of 0.5 mm or more and 3 mm or less.

The resin portion Wp is a resin portion constituting the work W. The resin portion Wp covers the surface of the metal portion (core material Wm) constituting the work W. The resin portion Wp is composed of a first resin portion Wp1 made of a thermoplastic resin and a second resin portion Wp2 made of a thermoplastic resin. The first resin portion Wp1 has a wall thickness of, for example, 0.02 mm or more and 1 mm or less. The second resin portion Wp2 has a wall thickness of, for example, 0.02 mm or more and 1 mm or less. The first resin portion Wp1 and the second resin portion Wp2 may be made of the same material or may be made of different materials. The material of the first resin portion Wp1 and the second resin portion Wp2 is, for example, PE (polyethylene), PP (polypropylene), PVC (polyvinyl chloride), PA (polyamide) or PTFE (polytetrafluoroethylene), respectively. It may be fluororesin or the like.

Further, the work W shown in FIG. 2 is an example of a resin-coated metal member, and is a resin-coated metal flat wire having a rectangular end face (cut surface). The work W is composed of a core material Wm and a resin portion Wp that covers the core material Wm. The resin portion Wp is composed of a first resin portion Wp1 and a second resin portion Wp2. The work W has a wall thickness of, for example, 0.1 mm or more and 5 mm or less. The work W has a width of, for example, 0.5 mm or more and 15 mm or less. This work W may be used as a flat wire for, for example, electrical wiring or communication. This work W corresponds to the work W shown in FIG. 10 described later.

The core material Wm is a metal portion constituting the work W. The core material Wm is a metal strip made of stainless steel for springs or the like. The metal strip to be the core material Wm has, for example, a thickness of 0.03 mm or more and less than 5 mm, and a width of 0.3 mm or more and less than 15 mm.

The resin portion Wp is a resin portion constituting the work W. The resin portion Wp covers the surface of the metal portion (core material Wm) constituting the work W. The resin portion Wp is composed of a first resin portion Wp1 made of a thermoplastic resin and a second resin portion Wp2 made of a thermoplastic resin. The first resin portion Wp1 has a wall thickness of, for example, 0.02 mm or more and 1 mm or less. The second resin portion Wp2 has a wall thickness of, for example, 0.02 mm or more and 1 mm or less. The first resin portion Wp1 and the second resin portion Wp2 may be made of the same material or may be made of different materials. The material of the first resin portion Wp1 and the second resin portion Wp2 is, for example, PE (polyethylene), PP (polypropylene), PVC (polyvinyl chloride), PA (polyamide) or PTFE (polytetrafluoroethylene), respectively. It may be fluororesin or the like.

Next, an example of the embodiment of the cutting device according to the present invention is shown in FIGS. 3 to 9.

The cutting device 1 shown in FIGS. 3 to 9 is a cutting device for a resin-coated metal member whose work W is a resin-coated metal member whose metal portion is coated with a resin portion. The cutting device 1 can cross the work W. The term "crossing" as used herein is intended to cut in a direction intersecting the longitudinal direction of the work W.

The cutting device 1 includes a linear first cutting edge 11 having a cutting edge angle of 5 degrees or more and 40 degrees or less, and a linear second cutting edge 12 having a cutting edge angle of 60 degrees or more and less than 90 degrees with a single blade. The movable blade 10 is provided. The cutting device 1 includes a fixed cutting tool 20 having a linear fixed cutting edge 21 having a cutting edge angle of 60 degrees or more and 90 degrees or less with a single blade. The cutting device 1 includes a support shaft portion 32 that can abut on the locking portion 13 provided on the movable blade 10, a guide portion 31 that guides the movement of the movable blade 10, and a work receiving portion on which the work W is installed. 33 and.

In the cutting device 1, the first cutting edge 11 of the movable cutting tool 10 has an inclination angle α (see FIG. 8) of 5 degrees or more and 30 degrees or less in a direction away from the fixed cutting edge 21 of the fixed cutting tool 20 (Z2 direction). It is configured in a straight line. The first cutting edge 11 of the movable cutting tool 10 has a predetermined cutting edge angle γ1 (see FIG. 5), and the linear cutting edge line 11a (see FIG. 5) is arranged on the Z1 side. The cutting edge angle γ1 of the first cutting edge 11 is configured to be 5 degrees or more and 40 degrees or less. For example, when the work W is relatively soft, the sharper the first cutting edge 11, that is, the smaller the cutting edge angle γ1, the smaller the load applied to the first cutting edge 11, the more the cutability into the work W. And biteability is improved. From this point of view, in the present invention, the cutting edge angle γ1 of the first cutting edge 11 of the movable blade 10 is set to 40 degrees or less. As a result, in the first cutting process described later, it is possible to easily and smoothly cut and bite into the resin portion Wp of the first cutting edge 11 by moving the movable cutting tool 10 to the X1 side. As a result, the frictional heat at the resin portion Wp in the crossing of the work W is reduced, and the occurrence of burning and fluffing at the resin portion Wp can be suppressed.

Further, in order to improve the cutting property and the biting property of the work W into the resin portion Wp, it is advantageous that the first cutting edge 11 is extremely sharp like a razor blade, that is, the smaller the cutting edge angle γ1 is. However, if the cutting edge angle γ1 is excessively small, the mechanical strength of the first cutting edge 11 is lowered, and the first cutting edge 11 may be damaged due to the lack of mechanical strength. From this point of view, in the present invention, the cutting edge angle γ1 of the first cutting edge 11 of the movable blade 10 is set to 5 degrees or more.

The cutting edge form of the first cutting edge 11 of the movable cutting tool 10 may be double-edged or single-edged as long as it has a cutting edge angle γ1 of 5 degrees or more and 40 degrees or less. In the first cutting edge 11 which is a double-edged blade, the side surface on the Y1 side of the movable blade 10 constituting the first cutting edge 11 is inclined to the Y1 side, the side surface on the Y2 side is inclined to the Y2 side, and both side surfaces are in the Z direction. They are arranged so that they are not parallel to each other. Further, in the first cutting edge 11 which is a single-edged blade, either the side surface of the movable blade 10 constituting the first cutting edge 11 on the Y1 side is tilted toward the Y1 side or the side surface on the Y2 side is tilted toward the Y2 side. The sides are arranged so as to be parallel to the Z direction. The cutting edge angle of the double-edged blade is smaller than the cutting edge angle of the single-edged blade having the same mechanical strength. From this point of view, it is preferable that the cutting edge form of the first cutting edge 11 of the movable cutting tool 10 is double-edged, and the first cutting edge 11 having a smaller cutting edge angle enhances the cuttability and biting property of the work W into the resin portion Wp.

In the cutting device 1, the second cutting edge 12 of the movable cutting tool 10 has a linear cutting edge line 12a (see FIG. 6) so as to face each other with respect to the fixed cutting edge 21 of the fixed cutting tool 20 in the Z direction. It is configured in. The second cutting edge 12 of the movable cutting tool 10 is a single-edged blade and has a predetermined cutting edge angle γ2 (see FIG. 6), and the cutting edge line 12a is arranged on the Z1 side. The second cutting edge 12 of the movable blade 10 is a single-edged blade. The movable blade 10 which is a single-edged blade is arranged so that the side surface of the movable blade 10 constituting the second cutting edge 12 on the Y1 side is parallel to the Z direction. As a result, in the second cutting edge 12 which is a single-edged blade, when the movable cutting edge 10 rotates in the Z1 direction in the second cutting process described later, the side surface of the movable cutting edge 10 constituting the second cutting edge 12 on the Y1 side is fixed. Does not collide with.

The second cutting edge 12 of the movable cutting tool 10 is a single-edged blade, and the cutting edge angle γ2 is 60 degrees or more and less than 90 degrees. When the cutting edge angle γ2 of the second cutting edge 12 which is a single-edged blade is 90 degrees or more, the second cutting edge 12 is configured before the second cutting edge 12 and the fixed cutting edge 21 of the fixed cutting tool 20 mesh with each other in the second cutting process described later. Since the side surface of the movable blade 10 on the Z1 side comes into contact with the work W, there is a risk of crushing the work W. From this point of view, in the present invention, the cutting edge angle γ2 of the second cutting edge 12 which is a single-edged blade is set to less than 90 degrees. In the present invention, the upper limit of the cutting edge angle γ2 of the second cutting edge 12 of the movable cutting tool 10 is set to less than 90 degrees, but how small the cutting edge angle γ2 of the second cutting edge 12 is set from 90 degrees is determined by the work W. It may be decided in consideration of the outer diameter and the thickness of.

Further, when the cutting edge angle γ2 of the second cutting edge 12 is 60 degrees or more, the mechanical strength of the second cutting edge 12 can be sufficiently increased, so that it is hard due to the engagement between the second cutting edge 12 and the fixed cutting edge 21. The load (cutting force) applied to the core material Wm (metal part) can be increased. The greater the cutting force, the better the cutting property (sharpness) of the hard core material Wm. From this point of view, in the present invention, the cutting edge angle γ2 of the second cutting edge 11 of the movable blade 10 is set to 60 degrees or more.

As a result, in the second cutting process described later, the cutting of the second cutting edge 12 into the core material Wm can be surely and smoothly made, and the engagement between the second cutting edge 12 and the fixed cutting edge 21 can be surely made smooth. be able to. As a result, it is possible to suppress the generation of metal burrs from the core material Wm (metal portion) in the crossing of the work W, and it is also possible to suppress the generation of crushing of the core material Wm by the second cutting edge 12.

In the cutting device 1, the fixed cutting edge 21 of the fixed cutting tool 20 has a linear cutting edge line 21a (see FIG. 6), and is arranged so as to face each other with the linear second cutting edge 12 of the movable cutting tool 10. The movable blade 10 is configured to be able to mesh with the second cutting edge 12. The first cutting edge 11 of the movable blade 10 is tilted in a direction away from the fixed cutting edge 21 (Z2 direction) with respect to the fixed cutting edge 21 of the fixed blade 20. The fixed cutting edge 21 of the fixed cutting tool 20 is a single-edged blade and has a cutting edge angle γ3 (see FIG. 6) of 60 degrees or more and 90 degrees or less. The fixed cutting edge 21 of the fixed blade 20 is a single-edged blade. The fixed blade 20 which is a single-edged blade is arranged so that the side surface of the fixed blade 20 constituting the fixed cutting edge 21 on the Y2 side is parallel to the Z direction or slightly tilted toward the Y1 side. As a result, the fixed cutting edge 21 which is a single-edged blade may collide with the side surface of the movable cutting edge 10 constituting the second cutting edge 12 on the Y1 side when the movable cutting edge 10 rotates in the Z1 direction in the second cutting process described later. do not have.

The fixed cutting edge 21 of the fixed blade 10 is a single-edged blade, and the cutting edge angle γ3 is 60 degrees or more and 90 degrees or less. When the cutting edge angle γ3 of the fixed cutting edge 21 which is a single-edged blade exceeds 90 degrees, the fixed cutting edge 20 constituting the fixed cutting edge 21 before the fixed cutting edge 21 and the second cutting edge 12 of the movable cutting tool 10 mesh with each other in the second cutting process described later. Since the side surface on the Z2 side of the above comes into contact with the work W, there is a risk of crushing the work W. From this point of view, in the present invention, the cutting edge angle γ3 of the fixed cutting edge 21 which is a single-edged blade is set to 90 degrees or less.

Further, when the cutting edge angle γ3 of the fixed cutting edge 21 is 60 degrees or more, the mechanical strength of the fixed cutting edge 21 can be sufficiently increased, so that the fixed cutting edge 21 and the second cutting edge 12 mesh with each other to form a hard core. The load (cutting force) applied to the material Wm (metal part) can be increased. The greater the cutting force, the better the cutting property (sharpness) of the hard core material Wm. From this point of view, in the present invention, the cutting edge angle γ3 of the fixed cutting edge 21 of the fixed cutting tool 20 is set to 60 degrees or more.

In the cutting device 1, the locking portion 13 is provided on the movable blade 10 and the support shaft portion 32 and the guide portion 31 are provided on the movable blade 10 other than the movable blade 10. The locking portion 13 is fixed to the movable blade 10 and moves in the X direction by moving the movable blade 10 in the X direction. The guide portion 31 is fixed to other than the movable blade 10 and smoothly guides the movement of the movable blade 10 in the X direction. The support shaft portion 32 is fixed to other than the movable blade 10 and comes into contact with the locking portion 13 while the movable blade 10 is moving in the X direction. The movement of the movable blade 10 in the X direction is stopped by the contact of the locking portion 13 with the support shaft portion 32. The locking portion 13 and the support shaft portion 32 each have a portion in contact with each other. For example, the locking portion 13 is provided with a portion having an arcuate concave surface, and the support shaft portion 32 is provided with a portion having an arcuate convex surface corresponding to the shape of the concave surface of the locking portion 13, so that each other can be smoothed. Can be brought into contact. Further, the locking portion 13 and the support shaft portion 32 each have a portion that enables rotation (swing) around the Y axis in a state where they are in contact with each other. For example, as shown in FIG. 3, the concave surface of the locking portion 13 is configured in a semicircular shape, and the convex surface of the support shaft portion 32 is configured in a cylindrical shape having a radius corresponding to the radius of the concave surface of the locking portion 13. As a result, the locking portion 13 and the support shaft portion 32 can rotate (swing) smoothly around the Y axis in a state where they are in contact with each other.

In the cutting device 1, the work W is installed on the work receiving portion 33 (see FIG. 4). In the work receiving portion 33, the work W is appropriately positioned so that cutting (crossing) at a predetermined position is possible. When the outer circumference of the work W is circular (see FIG. 1), the work W is shaken when the first cutting edge 11 abuts on the work W due to the movement of the movable blade 10 in the X direction in the work receiving portion 33. It is preferable to install the work W so that it can move. For example, a circular shape having a radius of curvature slightly smaller than the radius of curvature of the convex surface of the work W so as to correspond to the outer circumference of the circular shape of the work W on the portion of the work receiving portion 33 on which the work W is placed. It is preferable to provide a groove including a concave surface. When a groove portion having such a configuration is provided in the work receiving portion 33, the work W is positioned in the groove portion so that the work W can be moved when the first cutting edge 11 of the movable cutting tool 10 comes into contact with the work W. It can be swung in the groove. As a result, the resin portion Wp on the cut surface of the work W is easily burnt or fluffed due to the contact of the first cutting edge 11 of the movable blade 10 with the work W or the biting of the work W into the resin portion Wp. The effect of suppressing the occurrence can be enhanced.

Further, when the core material Wm of the work W is spiral (see FIG. 1), in the work receiving portion 33, the work W is divided into the extending direction of the spiral gap of the metal strip constituting the core material Wm and the fixed blade. It is preferable to position the fixed cutting edge 21 of 20 so as to match the extending direction (X direction). For example, if a moving device such as an XY table is incorporated in the work receiving portion 33, it is easy to adjust the movement of the work W in the X direction and the Y direction. As a result, in the work receiving portion 33, the positioning of the work W in which the extending direction of the spiral gap of the metal strip constituting the core material Wm is matched with the extending direction (X direction) of the fixed cutting edge 21 of the fixed cutting tool 20. Can be easily performed. In this case, for example, it may be a moving device in which a person operates the XY table while checking with a magnifying glass. Alternatively, for example, it may be a mobile device that automatically operates the XY table, including an image pickup device such as a CCD camera, a processing device for the image pickup data, and a movement control device for the XY table based on the processing data. ..

Next, the cutting process of the work W shown in FIG. 1 using the cutting device 1 shown in FIGS. 3 and 9 will be described.

The cutting of the work W by the cutting device 1 is composed of a first cutting process and a second cutting process.

In the first cutting process of the cutting device 1, the movable blade 10 moves toward the work W, that is, moves in the X1 direction, and the locking portion 13 provided on the movable blade 10 is provided in a support other than the movable blade 10. It is a process until it comes into contact with the shaft portion 32. In the first cutting process, the resin portion Wp of the work W is started to be cut by the first cutting edge 11 of the movable cutting tool 10. In the first cutting process, while the movable blade 10 moves from the standby position shown in FIG. 3 to the position shown in FIG. 8 in the X1 direction, the first cutting edge 11 of the movable blade 10 hits the resin portion Wp2 on the outer side of the work W. Contact and further cut into the resin portion Wp2. At this time, the first cutting edge 11 having an appropriate cutting edge angle γ1 and an appropriate tilt angle α of the movable cutting tool 10 does not cause burning or fluffing on the resin portion Wp of the work W, and the metal portion (core) of the work W. The work W can be smoothly cut by cutting smoothly into the work W without generating metal burrs on the material Wm).

In the work receiving portion 33, the extending direction of the spiral gap of the metal strip constituting the core material Wm coincides with the extending direction (X direction) of the fixed cutting edge 21 of the fixed cutting tool 20. When positioned in such a manner, the first cutting edge 11 cut into the resin portion Wp2 of the work W can smoothly enter the spiral gap of the metal strip. With the work W positioned in this way, the first cutting edge 11 of the movable blade 10 smoothly cuts the resin portion Wp2 of the work W into the resin portion Wp2 of the work W without contacting the core material Wp after cutting into the resin portion Wp2 of the work W. You can cut forward. Even when the first cutting edge 11 of the movable cutting tool 10 does not enter the spiral gap of the metal strip, the first cutting edge has an appropriate cutting edge angle γ1 (see FIG. 5) and an appropriate tilt angle α (see FIG. 8). 11 can cut through the resin portion Wp2 while cutting the core material Wm after cutting into the resin portion Wp2 of the work W.

In the first cutting process described above, the work W is cut by the first cutting edge 11 of the movable cutting tool 10 moved in the X1 direction, leaving a part of the resin portion Wp1, the core material Wm, and the resin portion Wp2 on the Z1 side. ..

In the subsequent second cutting process of the cutting device 1, the movable blade 10 that has stopped moving in the X1 direction because the locking portion 13 abuts on the support shaft portion 32 becomes a fixed blade 20 with the support shaft portion 32 as a rotation axis. It is a process of rotating in a close direction, that is, rotating in the Z1 direction. In the second cutting process, the cutting of the work W is completed by the engagement between the second cutting edge 12 of the movable blade 10 and the fixed cutting edge 21 of the fixed blade 20. That is, in the second cutting process, a part of the resin portion Wp1 and the core material Wm and the resin portion Wp2 on the Z1 side of the work W left uncut in the above-mentioned first cutting process are cut, and the cutting of the work W is completed. ..

In the second cutting process, the movable blade 10 is movable while rotating (swinging) in the Z1 direction around the point P with the support shaft portion 32 as the rotation axis from the state shown in FIG. 8 to the state shown in FIG. When the second cutting edge 12 of the cutting tool 10 meshes with the fixed cutting edge 21 of the fixed cutting tool, a part of the resin portion Wp1, the core material Wm, and the resin portion Wp2 on the Z1 side of the work W are cut. At this time, the second cutting edge 12 having an appropriate cutting edge angle γ2 with the single edge of the movable cutting tool 10 and the fixed cutting edge 21 having an appropriate cutting edge angle γ3 with the single edge of the fixed cutting edge 10 are smoothly meshed with each other, and during this meshing. In addition, the work W is completely cut while smoothly cutting the work W without causing burning or fluffing on the resin portion Wp of the work W and without causing metal burrs on the metal portion (core material Wm) of the work W. be able to.

After the completion of the second cutting process, the movable blade 10 rotates (swings) in the Z2 direction around the point P with the support shaft portion as the rotation axis, returns to the state shown in FIG. 8, and further moves in the X2 direction. Return to the standby position shown in 3. As a result, the cutting process of the work W by the cutting device 1 is completed.

Next, the cutting process of the work W shown in FIG. 2 using the cutting device 1 will be described. For convenience, the work W (resin-coated metal flat line) shown in FIG. 2 is referred to as “flat line W”, and the work W (resin-coated metal tube) shown in FIG. 1 is referred to as “tube W”.

The cutting of the flat line W by the cutting device 1 is substantially the same as that of the tube W, and is composed of the first cutting process and the second cutting process of the tube W described above. In the case of the flat line W, as shown in FIG. 10, in the first cutting process, the first cutting edge 11 of the movable cutting tool 10 abuts on the resin portion Wp1 on the upper side (Z2 side) of the flat line W, and the resin portion Wp1 is pressed. Cut forward. By this first cutting process, most of the resin portion Wp1 of the flat line W is cut, and the resin portion Wp1 does not burn or fluff. The state shown in FIG. 10 in the first cutting process of the flat line W corresponds to the state shown in FIG. 8 in the first cutting process of the tube W.

Subsequently, the cutting of the flat line W by the cutting device 1 is performed by the second cutting process as in the case of the tube W. In the second cutting process, the second cutting edge 12 of the movable cutting tool 10 and the fixed cutting edge 21 of the fixed cutting tool 20 mesh with each other, so that the uncut portion of the resin portion Wp1 of the flat wire W, the metal portion (core material Wm), and the lower side The resin portion Wp2 on the (Z1 side) is cut, no metal burrs are generated from the metal portion (core material Wm), and no burning or fluffing occurs on the resin portion Wp2. This completes the cutting of the flat line W. After that, the movable blade 10 returns to the standby state shown in FIG. 3, and the cutting of the flat line W is completed.

In the cutting device 1, the first cutting edge 11 of the movable cutting tool 10 is a linear cutting edge having a cutting edge angle γ1 (see FIG. 5) of 5 degrees or more and 40 degrees or less. The cutting edge angle γ1 of the first cutting edge 11 is preferably 25 degrees or less (5 degrees or more), and more preferably 15 degrees or less (5 degrees or more). When the blade edge angle γ1 of the first blade edge 11 is 25 degrees or less (5 degrees or more), more preferably 15 degrees or less (5 degrees or more), the blade width of the first blade edge 11 becomes narrower. Therefore, the cutting width of the work W into the resin portion Wp by the first cutting edge 11 becomes narrower, and the cutting into the resin portion Wp by the first cutting edge 11 becomes smoother. As a result, the effect of suppressing the occurrence of burning and fluffing of the resin portion Wp of the work W (particularly the outer resin portion Wp2) can be further enhanced.

In the cutting device 1, the first cutting edge 11 of the movable cutting tool 10 has an inclination angle α (see FIG. 8) of 5 degrees or more and 30 degrees or less in a direction (Z2 direction) away from the fixed cutting edge 21 of the fixed cutting tool 20. The tilt angle α of the first cutting edge 11 is preferably 25 degrees or less (5 degrees or more). When the inclination angle α of the first cutting edge 11 is 25 degrees or less (5 degrees or more), the extending direction of the cutting edge line of the first cutting edge 11 approaches the X direction, and the first cutting edge 11 is the resin portion Wp of the work W. The angle of contact with (shear angle) becomes smaller. Therefore, the force with which the first cutting edge 11 cuts into the resin portion Wp can be made smaller. The larger the tilt angle α of the first cutting edge 11, the larger the shear angle because the extending direction of the cutting edge line of the first cutting edge 11 approaches the Z direction. As a result, the effect of suppressing the occurrence of burning and fluffing of the resin portion Wp of the work W (particularly the outer resin portion Wp2) can be further enhanced.

In the cutting device 1, the second cutting edge 12 of the movable cutting tool 10 is a linear cutting edge having a cutting edge angle γ2 (see FIG. 6) of 60 degrees or more and less than 90 degrees with a single blade. The cutting edge angle γ2 of the second cutting edge 12 is preferably 87 degrees or less (60 degrees or more). When the blade edge angle γ2 of the second blade edge 12 is 87 degrees or less (60 degrees or more), the blade width of the second blade edge 12 becomes narrower. Therefore, the depth of cut into the resin portion Wp and the metal portion (core material Wm) of the work W by the second cutting edge 12 becomes narrower, and the resin portion Wp and the metal portion (core material Wm) by the second cutting edge 12 become narrower. The cut becomes smoother. This makes it possible to further enhance the effect of suppressing the occurrence of burning and fluffing in the resin portion Wp of the work W and the generation of metal burrs in the metal portion (core material Wm) of the work W. The cut into the work W becomes smoother as the cutting edge angle γ2 of the second cutting edge 12 of the movable cutting tool 10 becomes smaller, but the clearance between the second cutting edge 12 and the fixed cutting edge 21 of the fixed cutting tool 20 described later is appropriately adjusted. This enables smooth cutting of the work W.

In the cutting device 1, the fixed cutting edge 21 of the fixed cutting tool 20 is a linear cutting edge having a cutting edge angle γ3 (see FIG. 6) of 60 degrees or more and 90 degrees or less with a single blade. The cutting edge angle γ3 of the fixed cutting edge 21 is preferably 70 degrees or more (less than 90 degrees), more preferably 80 degrees or more (less than 90 degrees). When the cutting edge angle γ3 of the fixed cutting edge 21 is 70 degrees or more (less than 90 degrees), more preferably 80 degrees or more (less than 90 degrees), the mechanical strength of the fixed cutting edge 21 is further increased. Therefore, it is possible to more stably cut the resin portion Wp and the metal portion (core material Wm) of the work W by engaging the fixed cutting edge 21 and the second cutting edge 12. This makes it possible to further enhance the effect of suppressing the occurrence of burning and fluffing in the resin portion Wp of the work W and the generation of metal burrs in the metal portion (core material Wm) of the work W.

In the cutting device 1, the second cutting edge 12 of the movable cutting tool 10 and the fixed cutting edge 21 of the fixed cutting tool 20 are configured such that the cutting edge lines constituting one-sided blades face each other and the cutting edge lines smoothly mesh with each other. .. The clearance between the second cutting edge 12 of the movable cutting tool 10 and the fixed cutting edge 21 of the fixed cutting tool 20 is 0 mm (substantially no clearance in a non-pressure contact state) from the viewpoint of improving the cutability of the metal portion of the work W. Is good, but it is difficult to adjust the clearance. Therefore, it is better to adjust the clearance slightly to the plus side, for example, 0 mm or more + 0.01 mm or less (substantially with clearance), more preferably 0 mm or more + 0.005 mm or less (smaller clearance). ). If the clearance is adjusted to the minus side, the cutting edges will be in a pressure contact state, which may cause a problem in the meshing of the cutting edges. The clearance between the second cutting edge 12 and the fixed cutting edge 21 may be adjusted within the above range as necessary in consideration of various conditions such as the size and material of the work W.

1 Cutting device 10 Movable cutting tool 11 1st cutting edge 11a Cutting edge line 12 2nd cutting edge 12a Cutting edge line 13 Locking part 20 Fixed cutting tool 21 Fixed cutting edge 21a Cutting edge line 30 Device base 31 Guide part 32 Support shaft part 33 Work receiving part W Work Wm Core material (metal strip)
Wp Resin part Wp1 First resin part Wp2 Second resin part P point θ Rotation angle γ1 Cutting edge angle (first cutting edge)
γ2 cutting edge angle (second cutting edge)
γ3 Cutting edge angle (fixed cutting edge)
α tilt angle

Claims (4)

A cutting device whose work is a resin-coated metal member whose metal portion is covered with a resin portion.
A movable blade having a linear first cutting edge having a cutting edge angle of 5 degrees or more and 40 degrees or less, and a linear second cutting edge having a cutting edge angle of 60 degrees or more and less than 90 degrees with a single blade.
A fixed blade with a straight fixed blade with a single-edged blade with a cutting edge angle of 60 degrees or more and 90 degrees or less, and
A support shaft portion that can abut on the locking portion provided on the movable blade, and a support shaft portion.
A guide unit that guides the movement of the movable blade and
A work receiving part on which the work is installed is provided.
The first cutting edge is configured to have an inclination angle of 5 degrees or more and 30 degrees or less in a direction away from the fixed cutting edge.
The second cutting edge and the fixed cutting edge are configured to face each other.
The work is cut by the first cutting process until the movable blade moves toward the work and the locking portion abuts on the support shaft portion, and the movable blade uses the support shaft portion as a rotation axis. It is performed by a second cutting process that rotates in a direction close to the fixed blade.
In the first cutting process, cutting of the resin portion of the work by the first cutting edge is started, and in the second cutting process, cutting of the work by meshing between the second cutting edge and the fixed cutting edge is completed.
Cutting device for resin-coated metal members. The cutting device for a resin-coated metal member according to claim 1, wherein the work is installed in the work receiving portion so as to be able to swing due to contact with the first cutting edge of the movable blade. The work is a cutting device for a resin-coated metal member according to claim 1 or 2, wherein the metal portion is a spiral metal strip. The resin-coated metal member according to claim 3, wherein in the work receiving portion, the work is positioned so that the extending direction of the spiral gap of the metal strip and the extending direction of the fixed cutting edge match. Cutting device.

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