JP7053048B2 - Saw blade cutting equipment and cutting method - Google Patents

Description

The present invention relates to a saw blade cutting device for cutting a steel material, and more particularly to a saw blade cutting device and a cutting method capable of performing uniform cutting without clogging during cutting.

For example, a band saw machine for cutting a steel material having a desired diameter using a band saw is known. Such a band saw is particularly useful for cutting large-diameter steel materials and hard steel materials, and has been conventionally useful in cutting. As an example, a band saw blade as a processing tool is used in which a large number of blades are provided in an annular shape on a hoop-shaped strip.

For example, when a steel material having a circular cross section is cut as an object to be cut, the cutting length changes from moment to moment according to the cross-sectional shape of the object to be cut, and the cutting depth increases or decreases accordingly. In order to cope with this, a cutting method called a swing type, a seesaw type or an oscillation type for controlling a cutting length has been conventionally used in a band saw.

For example, in a band saw machine using an endless band saw blade disclosed in Patent Document 1, a swing fulcrum is provided at the lower part of the bed of the band saw, and the band saw head and its feed slide guide mechanism swing integrally with respect to the swing fulcrum. A swing mechanism has been proposed, and it is disclosed that a cutting feed is provided while maintaining an appropriate cutting length without being influenced by the cross-sectional shape of the work.

Utility Model Registration No. 3152124

However, it cannot be said that the current technology, not limited to the above-mentioned literature, appropriately meets the needs of the market, and there are problems as described below.

That is, according to the above-mentioned Patent Document 1, cutting can be performed without being influenced by the cross-sectional shape of the work piece, but when the work piece is machined by swinging the band saw, the cutting length is different at the center and both ends. It will be different by all means. In particular, when the band saw is swung and is located at both ends of the work piece, the amount of cut is larger than that at the center, so the chips become relatively large.

As a result of the difference in the cutting amount between the center and both ends of the cutting surface of the work piece, chips are accumulated between the blades of the band saw, and in the worst case, the band saw may be damaged. In addition, the cutting performance is deteriorated due to the accumulation of chips between the blades of the band saw, and it takes a lot of time to cut the work piece.
The present invention has been made in view of the above-mentioned problems as an example, and realizes an appropriate cutting amount at the center and both ends of the cutting surface of the object to be cut, and is to be cut without accumulating chips between the blades of the band saw. It is an object of the present invention to provide a saw blade cutting device and a cutting method capable of cutting an object quickly.

The saw blade cutting device according to the embodiment of the present invention includes (1) a base plate provided with a mounting table on which a work piece is placed, and a grip portion for gripping the work piece placed on the above-mentioned table. An upper frame that can swing around a swing fulcrum provided on the base plate, a saw blade member provided on the upper frame that cuts the object to be cut, and the upper portion via the swing fulcrum. The vertical movement mechanism includes a swing mechanism for swinging the frame and a vertical movement mechanism for raising the saw blade member when the upper frame swings at the swing end portion via the swing fulcrum. The cam rod provided on the upper frame, the cam follower provided at the end of the cam rod, the main body upper and lower cam members that come into contact with the cam follower and move the cam rod in the vertical direction, and the main body upper and lower cam members. It is characterized by being composed of a drive mechanism provided with a drive belt for rotationally driving the connected cam shafts .

Further, in the saw blade cutting device according to (1) described above, ( 2 ) the vertical movement mechanism is further provided with a separation amount adjusting mechanism for adjusting the separation amount of the saw blade member with respect to the work piece. Is preferable.

Further, in the saw blade cutting device according to (1) or (2) described above, ( 3 ) the separation amount adjusting mechanism is a movement that can be supported by contacting the link portion provided on the cam rod and the cam rod. It is preferable that the fulcrum and the moving fulcrum are composed of a linear guide that can be slidably moved.

Further, in the saw blade cutting device according to any one of (1) to ( 3 ) described above, (5) the saw blade member is mounted on a band saw and the upper frame, and the band saw is belted. It is preferably composed of a drive wheel for circulation and an electric motor for driving the drive wheel.

Further, in order to solve the above problems, the cutting method in one embodiment of the present invention is ( 5 ) sawing a work piece using the saw blade cutting device according to any one of (1) to (4) above. It is a cutting method of cutting with a member, in which the process of placing the object to be machined on a mounting table and the upper frame provided with the saw blade member are centered on a swinging fulcrum of a base plate having the above-mentioned table. It has a step of cutting the work piece while swinging, and raises the saw blade member by a vertical movement mechanism when the upper frame swings at a swing end portion via the swing fulcrum. At the same time, when swinging at a position other than the swinging end portion, the saw blade member is lowered as compared with the case of the swinging end portion, and the vertical movement mechanism includes a cam rod provided on the upper frame and the above. It is provided with a cam follower provided at the end of the cam rod, a main body upper and lower cam member that comes into contact with the cam follower to move the cam rod in the vertical direction, and a drive belt that rotationally drives a cam shaft connected to the main body upper and lower cam member. It is characterized by being composed of a drive mechanism and a drive mechanism .

According to the present invention, an appropriate cutting amount can be realized at the center and both ends of the cutting surface of the work piece, and the work piece can be quickly cut without accumulating chips between the blades of the band saw.

It is external schematic diagram which shows typically the whole structure of the saw blade cutting apparatus in embodiment. It is a side view which shows typically the side surface of the saw blade cutting apparatus in embodiment. FIG. 1 is a schematic diagram for explaining the structure of a grip portion in a saw blade cutting device. 2 is a schematic diagram 2 for explaining the structure of the grip portion in the saw blade cutting device. FIG. 3 is a schematic diagram for explaining the structure of the grip portion in the saw blade cutting device. FIG. 1 is a schematic diagram for explaining the structure of a swing mechanism and a vertical movement mechanism in a saw blade cutting device. 2 is a schematic diagram 2 for explaining the structure of the swing mechanism and the vertical movement mechanism in the saw blade cutting device. It is a schematic diagram for demonstrating the structure of the separation amount adjustment mechanism mounted on the vertical movement mechanism in a saw blade cutting apparatus. It is a flowchart of the cutting method in an embodiment. It is a schematic diagram explaining the rocking end portion at the time of cutting with the saw blade cutting apparatus in embodiment, and the cutting length in other parts. It is a schematic diagram explaining the state of a chip at the time of cutting with a saw blade cutting apparatus in an embodiment.

Next, an embodiment for carrying out the present invention will be described.
In the following, the height direction of the saw blade cutting device 100 is defined as the Z direction, the insertion (feeding) direction of the work piece W is defined as the Y direction, and the cutting direction of the work piece W with respect to the saw blade member 40 is defined as the X direction. explain. However, these directions are merely examples, and are not intended to reduce the technical idea of the present invention.

[Saw blade cutting device 100]
The saw blade cutting device 100 according to the present embodiment will be described with reference to FIGS. 1 to 8.
First, as shown in FIGS. 1 and 2, the saw blade cutting device 100 has a function of cutting a work piece W, which is a so-called work, and has a base plate 10, a grip portion 20, and an upper frame 30. It includes a saw blade member 40, a swing mechanism 50, and a vertical movement mechanism 60.
For device structures other than those described in detail below, for example, known swing-type cutting mechanisms (band saws, etc.) including the above-mentioned Utility Model Registration No. 3152124 can be referred to.

Here, the "work piece W" of the present embodiment can be exemplified by, for example, a magnetic or non-magnetic metal steel material or a resin rod. Of these, a small-diameter or large-diameter steel material having a circular cross section is particularly suitable as the work piece W. Further, the workpiece W of the present embodiment preferably has a circular cross section, but can be applied even if the cross section has an elliptical shape or a polygonal shape, for example.

The base plate 10 includes a mounting table 11 on which the above-mentioned work piece W is mounted. As the base plate 10 of this embodiment, for example, a structure applied to a known band saw may be applied as long as the work piece W can be gripped by the grip portion 20 described later.
The grip portion 20 has a function of gripping the work piece W mounted on the mounting table 11 described above. More specifically, as shown in FIG. 3, the grip portion 20 of the present embodiment is a vise 21 capable of sandwiching the work piece W, and the vise 21 is placed in the width direction (X direction) of the work piece W. It is configured to include a vise driving unit 22 that is brought close to or separated from each other. In this embodiment, a hydraulic cylinder is applied as an example of the vise drive unit 22, but the present invention is not limited to this, and a known drive mechanism such as a pneumatic cylinder or a rack & pinion type gear mechanism may be adopted.

The upper frame 30 is configured to be swingable around a swing fulcrum 12 provided on the base plate 10 described later. For a more detailed mechanism of the swing mechanism, for example, the swing mechanism described in Utility Model Registration No. 3152124 can be referred to.
As shown in FIG. 1 and the like, the upper frame 30 of the present embodiment has a side support column 31 to which the elevating part main body 45 can be moved up and down, and an elevating drive motor 48 provided at the upper end portion of the side column 31. 32, and a lower support 33 having an opening 34 provided at the lower end of the side support 31 and into which a swing shaft as a swing fulcrum 12 described later is inserted. There is.

The saw blade member 40 is provided on the upper frame 30 and has a function of cutting the workpiece W. More specifically, the saw blade member 40 of the present embodiment includes a band saw 41, a drive wheel 42 mounted on the upper frame 30 for belt-hanging the band saw 41 to circulate, and an electric motor for driving the drive wheel 42. (Not shown).
The material of the blade of the band saw 41 is not particularly limited, and a known material having been surface-treated such as diamond coating can be applied. Further, in the present embodiment, a band saw is applied as the blade of the saw blade member 40, but the present invention is not limited to this embodiment, and other known saw blades such as a tip saw may be used.

Further, in the present embodiment, as shown in FIG. 2, since the saw blade member 40 is installed so as to be inclined with respect to the side support column 31, the band saw 41 is erected vertically with respect to the cutting surface of the work piece W. A mechanism is needed. Therefore, in the saw blade cutting device 100 of the present embodiment, the blade posture adjusting portion 43 for standing the band saw 41 vertically, the support portion 44 for suspending and supporting the blade posture adjusting portion 43, and the upper end portion of the support portion 44 are provided. A blade length adjusting mechanism 46 (for example, as in this example, a motor and a rack & rack) that can move the elevating part main body 45 and the blade posture adjusting part 43 provided on the elevating part main body 45 in the width direction (Y direction). A set of pinions can be exemplified), a ball screw 47 connected to the elevating part main body 45, and an elevating drive motor 48 for driving the ball screw 47. This makes it possible to move the saw blade member 40 (at least the band saw 41) in the vertical direction.

The swing mechanism 50 has a function of swinging the upper frame 30 via the swing fulcrum 12 described above. More specifically, as shown in FIGS. 6 and 7, the swing mechanism 50 of the present embodiment includes a swing rod 51 provided on the upper frame 30 (the end of the lower support column 33) and the swing rod. The first cam follower 52 provided at the end of the 51, the swing cam member 53 that comes into contact with the first cam follower 52 and moves the swing rod 51 in the vertical direction, and the swing cam member 53 are connected to each other. It is composed of a drive mechanism 66 provided with a drive belt 65 for rotationally driving the camshaft 61.

The vertical movement mechanism 60 has a function of raising the saw blade member 40 when the upper frame 30 swings at the swing end portion (the portion that is most inclined to the left and right by swinging) via the swing fulcrum 12. are doing. As can be understood from FIG. 1, the swing shaft as the swing fulcrum 12 is inserted with a predetermined gap with respect to the opening 34. Therefore, even if the upper frame 30 is raised by the vertical movement mechanism 60, it is suppressed that it unintentionally interferes with the above-mentioned swing shaft.
As a result, when the work piece W is cut by the saw blade member 40, the band saw 41 rises with respect to the work piece W at the above-mentioned swinging end portion, thereby suppressing the cutting depth from becoming excessive. Therefore, an appropriate depth of cut can be realized at the center and both ends of the cutting surface of the work piece W.

As is clear from FIGS. 6 and 7, the vertical movement mechanism 60 of the present embodiment has a cam rod 62 provided on the upper frame 30 (the end of the lower support column 33) and a second cam rod 62 provided on the end of the cam rod 62. The two cam followers 63, the main body upper and lower cam members 64 that come into contact with the second cam follower 63 to move the cam rod 62 in the vertical direction, and the drive belt 65 that rotationally drives the camshaft 61 connected to the main body upper and lower cam members 64. It is composed of a drive mechanism 66 provided.

As described above, in the present embodiment, the swing mechanism 50 and the vertical movement mechanism 60 are provided on the common camshaft 61, and are further configured to be driven by the drive mechanism 66 having the common drive belt 65. It is preferable to have. As a result, it is possible to improve the efficiency of the device space and prevent the device scale from becoming large.

As shown in FIG. 7, the swing mechanism 50 and the vertical movement mechanism 60 are provided on a common camshaft 61, but the swing mechanism 50 and the vertical movement mechanism 60 have a speed ratio of 1: 1 via the adjustment gear 67. It has been adjusted to 2. Thereby, for example, when the camshaft 61 makes one rotation, the swing mechanism 50 swings once, whereas the vertical movement mechanism 60 can be configured to perform the vertical movement twice. In other words, for example, as shown in FIG. 10, it is possible to raise the saw blade member 40 (band saw 41) at each of the two swing ends (both ends) for one swing.

Further, as shown in FIGS. 5 and 8, the vertical movement mechanism 60 of the present embodiment is a separation amount adjusting mechanism 70 that adjusts the separation amount (the degree of increase described above) of the saw blade member 40 with respect to the workpiece W. It is preferable to further prepare. This makes it possible to set an appropriate separation amount (the degree of increase described above) according to, for example, the diameter of the workpiece W.

As is clear from these figures, the separation amount adjusting mechanism 70 of the present embodiment includes a link portion 71 provided on the cam rod 62, a moving fulcrum 72 that can be supported in contact with the cam rod 62, and the moving fulcrum 72. It is composed of a linear guide 73 that can be slidably moved. Although not shown, the moving fulcrum 72 is configured to be movable on the linear guide 73 by a known drive mechanism such as a servo motor or a cylinder mechanism.

The link portion 71 allows the cam rod 62 to bend with the link portion 71 as a joint portion. Therefore, as shown in FIG. 8, it is possible to adjust the degree of rise of the upper frame 30 (lower support column 33) according to the contact location of the moving fulcrum 72 in contact with the cam rod 62.

More specifically, for example, when the moving fulcrum 72 is located at the right end 72R (directly below the link portion 71) on the linear guide 73, the cam rod 62 on the left side of the link portion 71 is rotated by the rotation of the main body upper and lower cam members 64. Even if it moves up and down, the cam rod 62 on the right side of the link portion 71 hardly moves up and down with respect to this vertical movement.

On the other hand, for example, when the moving fulcrum 72 is located on the left end 72L (closer to the end of the cam rod 62) on the linear guide 73, the cam rod 62 on the left side of the link portion 71 is rotated by the rotation of the main body upper and lower cam members 64. When it moves up and down, the cam rod 62 on the right side of the link portion 71 also moves up and down following this up and down movement. In other words, the degree of rise by the cam rod 62 (and thus the amount of separation of the saw blade member 40 from the work piece W) is adjusted depending on where the moving fulcrum 72 is arranged between the left end 72L and the right end 72R. Is possible.

As a result, for example, when the work piece W is a steel material having a circular cross section and a small diameter, for example, by arranging the moving fulcrum 72 on the side closer to the right end 72R, the band saw when swinging at the above-mentioned swing end portion. The degree of increase (separation amount) of 41 may be relatively small. Alternatively, for example, when the work piece W is a steel material having a high hardness, for example, by arranging the moving fulcrum 72 on the side closer to the left end 72L, the band saw 41 when swinging at the above-mentioned swing end portion. The degree of increase (separation amount) may be relatively large.
The swing mechanism 50 and the vertical movement mechanism 60 described above are controlled via a control device (not shown). As such a control device, a known computer equipped with a memory and a CPU can be exemplified.

According to the saw blade cutting device 100 in the present embodiment described above, as shown in FIG. 11, the center (cutting at a position other than the swinging end) and both ends (swinging) of the work piece W on the cutting surface. An appropriate amount of cut can be achieved by cutting at the end). Further, in the figure, since it is possible to realize a cutting amount with an appropriate cutting depth g at the swinging end portion, this prevents the chips from being unintentionally enlarged. Since an appropriate cutting amount can be realized in this way, it is possible to quickly cut the workpiece W without retaining chips between the blades of the band saw 41.

[Cutting method with saw blade cutting device 100]
Next, the cutting method by the saw blade cutting device 100 in the present embodiment will be described with reference to FIG. 9 as well.
First, in step 1 of the figure, the work piece W is installed on the mounting table 11. For such setting of the object to be cut W, for example, a known robot handler may be used, or in the case of a heavy object, a known transfer mechanism such as a crane may be applied.

Next, in step 2, the diameter of the work piece W is input to the above-mentioned control device. For example, in this embodiment, the outer diameter of the work piece W is input as an example.
Then, in step 3, the above-mentioned control device adjusts the degree of increase (separation amount) by the separation amount adjusting mechanism 70 according to the input diameter of the work piece W.

For example, in the case of a design specification in which the upper frame 30 is tilted by ± 3 ° by the swing mechanism 50, the linear guide of the moving fulcrum 72 is raised by 5 mm at the swing end (that is, when the upper frame is tilted by 3 ° from the horizontal). The position on 73 is specified. Further, at this time, for example, when the upper frame is tilted by 1.5 °, the position of the moving fulcrum 72 on the linear guide 73 is defined so as to rise by 2.5 mm.

In the following step 4, the control device described above rotates the drive wheel 42 to start driving the saw blade member 40, and swings the upper frame 30 provided with the saw blade member 40 to move the workpiece W. To cut. As described above, at this time, the upper frame 30 swings around the swing fulcrum 12 of the base board 10 having the above-mentioned stand 11.

At this time, in step 4, when the upper frame 30 swings at the swing end portion via the swing fulcrum 12, the saw blade member 40 is raised and a position other than the swing end portion (the above-mentioned work piece). When swinging at the center of the cutting surface of W), the saw blade member 40 is controlled to be lowered as compared with the swing end portion. As a result, an appropriate cutting amount can be realized at the center and both ends of the cutting surface of the work piece W.

Then, in step 5, it is determined whether or not the cutting of the work piece W is completed, and if cutting is still in progress, the process returns to step 4 to continue the cutting process, and when the cutting is completed, the cutting of the work piece W is completed. Processing is completed as if it were done.

When the workpiece W is a member long in the axial direction (Y direction in FIG. 1), the workpiece W is placed on the mounting table 11 by, for example, a feed mechanism 23 (see FIG. 5) using a servomotor 23a. It may be configured to slide to cut a new cut surface. Further, although chips of the work piece W are generated around the mounting table 11 by the saw blade member 40, the chips may be collected by a known suction mechanism (not shown) or the like.

The embodiments described above are suitable embodiments for carrying out the present invention, and are not limited thereto and can be appropriately modified.
For example, the band saw 41 in the saw blade member 40 exemplifies a single band saw, but a plurality of band saws 41 may be mounted. Further, depending on the length of the workpiece W in the axial direction (Y direction), a plurality of saw blade cutting devices 100 may be arranged side by side and the same workpiece W may be cut.

As described above, the saw blade cutting device and the cutting method thereof of the present invention contribute to a processing device that quickly cuts a work piece without accumulating chips between the blades of a band saw while realizing an appropriate cutting amount. Can be done.

100 Saw blade cutting device 10 Base board 11 Mounting base 12 Swing fulcrum 20 Grip part 21 Vise 22 Vise drive part 23 Feed mechanism 23a Servo motor 30 Upper frame 31 Side support 32 Upper support 33 Lower support 34 Opening 40 Saw blade member 41 Band saw 42 Drive wheel 43 Blade posture adjustment part 44 Support part 45 Elevating part main body 46 Blade length adjustment mechanism 47 Ball screw 48 Elevating drive motor 50 Swing mechanism 51 Swing rod 52 1st cam follower 53 Swing cam member 60 Vertical movement mechanism 61 Cam shaft 62 Cam rod 63 2nd cam follower 64 Main body upper and lower cam members 65 Drive belt 66 Drive mechanism 70 Separation amount adjustment mechanism 71 Link part 72 Moving fulcrum 73 Linear guide 72R Right end 72L Left end g Cutting depth W Work piece

Claims (5)

A base board with a mounting table on which the work piece is placed, and
A gripping part that grips the work piece placed on the table described above,
An upper frame that can swing around the swing fulcrum provided on the base board, and
A saw blade member provided on the upper frame for cutting the work piece, and
A swing mechanism that swings the upper frame via the swing fulcrum,
A vertical movement mechanism that raises the saw blade member when the upper frame swings at the swing end portion via the swing fulcrum.
Equipped with
The vertical movement mechanism is
With the cam rod provided on the upper frame,
A cam follower provided at the end of the cam rod and
A main body upper and lower cam member that comes into contact with the cam follower and moves the cam rod in the vertical direction,
A saw blade cutting device comprising a drive mechanism provided with a drive belt for rotationally driving a camshaft connected to the main body upper and lower cam members . The saw blade cutting device according to claim 1 , wherein the vertical movement mechanism further includes a separation amount adjusting mechanism for adjusting the separation amount of the saw blade member with respect to the work piece. The separation amount adjusting mechanism is
The link portion provided on the cam rod and
A moving fulcrum that can be supported by contacting the cam rod,
A linear guide whose moving fulcrum can be slid and moved,
The saw blade cutting apparatus according to claim 1 or 2 , which comprises. The saw blade member is
With a band saw,
A drive wheel mounted on the upper frame for belting and circulating the band saw,
The electric motor that drives the drive wheel and
The saw blade cutting apparatus according to any one of claims 1 to 3 , which is composed of the above. A cutting method for cutting an object to be cut with a saw blade member using the saw blade cutting device according to any one of claims 1 to 4 .
The process of placing the work piece on the mounting table and
It has a step of cutting the work piece while swinging the upper frame provided with the saw blade member around the swing fulcrum of the base plate having the above-mentioned stand.
When the upper frame swings at the swing end portion via the swing fulcrum, the saw blade member is raised by the vertical movement mechanism, and when the saw blade member swings at a position other than the swing end portion, the saw blade member is raised. The blade member is lowered more than at the swing end ,
The vertical movement mechanism is
With the cam rod provided on the upper frame,
A cam follower provided at the end of the cam rod and
A main body upper and lower cam member that comes into contact with the cam follower and moves the cam rod in the vertical direction,
A cutting method comprising: a drive mechanism provided with a drive belt for rotationally driving a camshaft connected to the main body upper and lower cam members .

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