JP7114114B1 - Machine Tools - Google Patents

Abstract

A machine tool capable of shortening the machining cycle of cutting is provided. A machine tool (1) is provided with a gripper (21) that grips a workpiece (W) and conveys it to a machining position (P), and vices (30) that clamp the workpiece (W) conveyed to the machining position (P). . During cutting of the workpiece W, the vices 30, 30 can move in the conveying direction of the workpiece W while holding the workpiece W, and the gripper 21 moves the vices 30, 30 in the conveying direction. In synchronism with , it is configured to be able to move in the conveying direction while gripping the workpiece W. [Selection drawing] Fig. 3

Description

The present invention relates to machine tools.

2. Description of the Related Art Conventionally, as a machine tool for cutting a workpiece such as shaped steel, for example, one disclosed in Patent Document 1 is known. The machine tool disclosed in Patent Document 1 includes a transfer vise that transfers a workpiece to a machining position, and a main vise that clamps and fixes the workpiece that has been transferred to the machining position. In this machine tool, a workpiece is transported to a machining position by a transport vise, the transported workpiece is clamped and fixed by a main vise, and a rotationally driven drill bit is pressed against a predetermined position of the workpiece. , and drills holes in the workpiece.

JP-A-58-196910

By the way, the main vise of the machine tool disclosed in Patent Document 1 has only a function to operate in a direction perpendicular to the conveying direction of the workpiece to clamp the workpiece. For this reason, the main vise cannot be moved in the conveying direction of the workpiece during drilling, and it has been impossible to form long holes extending in the conveying direction.
It is conceivable to use a transfer vise to process long holes that extend in the transfer direction. There is a problem of ease. In order to avoid vibrations during machining, it is conceivable to frequently change the position of the work piece between the transfer vise and the main vise while machining elongated holes, etc., but this would increase the machining cycle time. problem arises.

SUMMARY OF THE INVENTION An object of the present invention is to provide a machine tool capable of solving the above-described problems and machining elongated holes or the like extending in the conveying direction of a workpiece and shortening the machining cycle time.

In order to solve the above-mentioned problems, a machine tool of the present invention is provided on a conveying path for conveying a work piece, and moves along the conveying path while grasping the rear end of the work piece to perform cutting at a cutting position. and a gripper that conveys the work material to a cutting position where cutting is performed on the downstream side thereof; a vise that clamps the work material that has been conveyed to the cutting position; a saw blade for cutting the workpiece transported to the cutting position into a predetermined length . The vise is capable of moving in the moving direction of the gripper while holding the workpiece during cutting of the workpiece, and the gripper is synchronized with the movement of the vise, It is possible to move on the conveying path while gripping the workpiece . After the cutting process, the gripper conveys the work material to the cutting position by moving on the conveying path while continuously gripping the work material, and also grips the work material during the cutting process. It is characterized by being able to continue .

In the machine tool of the present invention, when cutting a workpiece, the vise can move in the direction of movement of the gripper ( conveying direction of the workpiece, the same applies hereinafter) while holding the workpiece. It is possible to process long holes extending in the direction. When the cutting of the workpiece is completed, the gripper can move the workpiece in the conveying direction in succession to the operation of releasing the clamping of the workpiece by the vise, so the workpiece is re-gripped by the gripper. is no longer required, shortening the machining cycle time. This contributes to a reduction in processing costs.

Moreover, it is preferable that the gripper is provided in a gripper device that can move on the transport path . By configuring in this way, synchronization between the movement of the vise and the movement of the gripper can be realized with a simple configuration.

According to the machine tool of the present invention, it is possible to machine a long hole or the like extending in the conveying direction of the workpiece and shorten the machining cycle time.

1 is a front view of a machine tool according to an embodiment of the present invention; FIG. FIG. 4 is a plan view showing a table that moves along the vice axis of the machine tool according to the embodiment of the present invention; 1 is a partially omitted left side view of a machine tool according to an embodiment of the present invention; FIG. It is an expansion perspective view which shows the right-and-left vise of the machine tool which concerns on embodiment of this invention. It is a perspective view which shows the example of cutting of the machine tool which concerns on embodiment of this invention.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate. Hereinafter, for convenience of explanation, the horizontal direction is defined as the X-axis direction, the front-rear direction is defined as the Y-axis direction, and the vertical direction is defined as the Z-axis direction. The X-axis direction and the Y-axis direction are horizontal directions parallel to the floor of the factory or the like where the machine tool is installed, and the Z-axis direction is the vertical direction orthogonal to the floor of the factory or the like.

As shown in FIG. 1, the machine tool 1 includes a machine tool main body 10 and a gripper device 20 (see FIG. 3) provided separately from the machine tool main body 10. As shown in FIG. The machine tool body 10 is provided with left and right vices 30, 30 as vices. The left and right vices 30, 30 sandwich the shaped steel W (steel material) as the work material conveyed to the processing position P (see FIG. 3) from the left and right directions. The gripper device 20 includes a gripper 21 that grips the rear end portion of the shaped steel W and conveys the shaped steel W to the processing position P. As shown in FIG.

A machine tool body 10 includes a base 11 and a support plate 12 fixed to the back surface of the base 11 and standing vertically. Left and right vices 30 , 30 are provided on the base 11 . A control panel 7 is provided on the left side of the base 11 . The support plate 12 supports an upper processing device 40, a left processing device 50, and a right processing device 60 for cutting the shaped steel W. As shown in FIG. A saw blade unit 80 (see FIG. 3) is provided on the back side of the support plate 12 .
In the following, as the shaped steel W, an H-shaped steel will be described as an example. The H-section steel has an H-shaped cross section and includes a web 2a extending in the X-axis direction and flange portions 2b, 2b connected to both left and right ends of the web 2a and extending in the Z-axis direction. (See Figure 5). The H-section steel is long and is conveyed toward the machine tool main body 10 on the conveying path 3 (see FIG. 3) extending in the Y-axis direction (perpendicular to the paper surface of FIG. 1). A gripper device 20 is used for transporting the H-section steel. The gripper device 20 is provided movably on the transport path 3 in the Y-axis direction.

A first table 13 and a pair of left and right second tables 14 , 14 arranged on the first table 13 are provided on the base 11 as members for supporting the shaped steel W. As shown in FIG. The first table 13 is movable on the base 11 in the Y-axis direction, which is the direction in which the shaped steel W is conveyed. The second tables 14, 14 are movable on the first table 13 in the X-axis direction perpendicular to the direction in which the shaped steel W is conveyed. Left and right vices 30, 30 are provided on the second tables 13, 13, respectively.

As shown in FIG. 2, the first table 13 has a laterally long rectangular shape in plan view. The first table 13 has a size that allows the movement of the second tables 14, 14 in the lateral direction, that is, a size that allows the movement of the left and right vices 30, 30 for clamping or releasing the shaped steel W. ing. The first table 13 is movable in the Y-axis direction along a pair of left and right linear guide rails R<b>1 , R<b>1 provided on the upper surface of the base 11 . The linear guide rails R1, R1 are arranged on the left and right portions of the upper surface of the base 11 and extend in the Y-axis direction.

The first table 13 is moved in the Y-axis direction by a moving mechanism having an electric motor 13a and a ball screw 13b rotationally driven by the electric motor 13a. The electric motor 13a is fixed to the right front portion of the base 11 via a bracket (not shown). A nut portion 13c fixed to the first table 13 is screwed onto the ball screw 13b via a plurality of balls.
The first table 13 is moved between a cutting start position and a cutting end position of the section steel W by rotation of the ball screw 13b. Alternatively, the output of the electric motor 13a may be transmitted to the ball screw 13b via a reduction gear.

Each second table 14 has a quadrangular shape with a part notched in plan view (see FIG. 4). The second table 14 has a size on which the vice 30 can be placed. Each second table 14 is movable in the X-axis direction along a pair of front and rear linear guide rails R<b>2 , R<b>2 provided on the upper surface of the first table 13 . The linear guide rails R2, R2 are arranged on the front and rear parts of the upper surface of the first table 13 and extend in the X-axis direction.

Each second table 14 is moved in the X-axis direction by each cylinder device 14 a arranged on the left and right sides of the first table 13 . Each cylinder device 14a is, for example, a hydraulic cylinder.

Since the left and right vices 30, 30 have a symmetrical structure, only the left vice 30 will be described here, and the description of the right vice 30 will be omitted. The left vise 30, as shown in FIGS. 2 and 4, has front and rear support arms 30a and 30b.
The support arm 30a on the front side has a clamping portion 31a that clamps the flange portion 2b of the shaped steel W, and a roller portion 32 that supports the lower end portion of the flange portion 2b. The holding portion 31a is configured to abut on the upper side surface of the flange portion 2b on the front side of the processing position P in the conveying direction. The roller part 32 assists the transportation of the shaped steel W to the processing position P and supports the shaped steel W transported to the processing position P.

The support arm 30b on the rear side includes a clamping portion 31b that clamps the flange portion 2b of the shaped steel W, a support portion 33 that supports the lower end portion of the flange portion 2b, and a support arm 30b that moves in the Z-axis direction along the clamping portion 31b. and a clamping lever 34 that clamps the upper end of the flange portion 2 b between itself and the portion 33 . The holding portion 31b is configured to abut on the upper side surface of the flange portion 2b on the rear side of the processing position P in the transport direction. The clamping lever 34 is operated by a hydraulic cylinder 35 provided below the support portion 33 .

The left and right vices 30, 30 as described above can be moved by the first table 13 by a predetermined amount in the Y-axis direction while holding the shape steel W transported to the processing position P therebetween. As a result, cutting can be performed while moving the shaped steel W in the Y-axis direction, and a long hole or the like extending in the Y-axis direction can be machined in the shaped steel W.

The upper processing device 40, the left processing device 50, and the right processing device 60 are movable in the X-axis direction and the Z-axis direction along the reference plane (the plane parallel to the support plate 12) indicating the processing position P in FIG. is configured to

The upper processing device 40 includes an upper pedestal 41, a moving table 42, an upper processing motor 43, a horizontal movement mechanism 44, and a vertical movement mechanism 45, as shown in FIG. The upper pedestal 41 is movable in the X-axis direction along linear guide rails R3 and R4 provided on the front surface of the support plate 12 . The linear guide rail R3 is arranged in the upper central portion of the support plate 12 and extends in the X-axis direction. The linear guide rail R4 is arranged in the vertical central portion of the support plate 12 and extends over substantially the entire support plate 12 in the X-axis direction.

The upper pedestal 41 is moved in the X-axis direction by a lateral movement mechanism 44 . The lateral movement mechanism 44 includes an electric motor 44a and a ball screw 44b rotationally driven by the electric motor 44a. The moving table 42 is movable in the Z-axis direction along linear guide rails R41, R41 provided on the front surface of the upper pedestal 41. As shown in FIG. The linear guide rails R41, R41 are arranged on the left and right portions of the upper pedestal 41 and extend in the Z-axis direction.

The movable table 42 is moved in the Z-axis direction by a vertical movement mechanism 45 . The vertical movement mechanism 45 includes an electric motor 45a and a ball screw 45b rotationally driven by the electric motor 45a. The electric motor 45a is a motor with a brake. The upper processing motor 43 is installed on the front surface of the moving table 42 . The cutting tool attached to the upper machining motor 43 faces downward in the Z-axis direction.

The left processing device 50 includes a left pedestal 51 , a moving table 52 , a left processing motor 53 , a horizontal movement mechanism 54 and a vertical movement mechanism 55 . The left pedestal 51 is movable in the X-axis direction along linear guide rails R4 and R5. The linear guide rail R5 is arranged on the lower left portion of the support plate 12 and extends in the X-axis direction.

The left pedestal 51 is moved in the X-axis direction by a lateral movement mechanism 54 . The lateral movement mechanism 54 includes an electric motor 54a and a ball screw 54b rotationally driven by the electric motor 54a. The moving table 52 is movable in the Z-axis direction along linear guide rails R51, R51 provided on the front surface of the left pedestal 51. As shown in FIG. The linear guide rails R51, R51 are arranged on the left and right parts of the left pedestal 51 and extend in the Z-axis direction.

The movable table 52 is moved in the Z-axis direction by a vertical movement mechanism 55 . The vertical movement mechanism 55 includes an electric motor 55a and a ball screw 55b rotationally driven by the electric motor 55a. The electric motor 55a is a motor with a brake. The left processing motor 53 is installed on the front surface of the moving table 42 . The cutting tool attached to the left machining motor 43 faces right in the X-axis direction.

The right processing device 60 includes a right pedestal 61 , a moving table 62 , a right processing motor 63 , a horizontal movement mechanism 64 and a vertical movement mechanism 65 . The right pedestal 61 is movable in the X-axis direction along linear guide rails R4 and R6. The linear guide rail R6 is arranged on the lower right portion of the support plate 12 and extends in the X-axis direction.

The right pedestal 61 is moved in the X-axis direction by a lateral movement mechanism 64 . The lateral movement mechanism 64 includes an electric motor 64a and a ball screw 64b rotationally driven by the electric motor 64a. The moving table 62 is movable in the Z-axis direction along linear guide rails R61, R61 provided on the front surface of the right pedestal 61. As shown in FIG. The linear guide rails R61, R61 are arranged on the left and right parts of the right pedestal 61 and extend in the Z-axis direction.

The movable table 62 is moved in the Z-axis direction by a vertical movement mechanism 65 . The vertical movement mechanism 65 includes an electric motor 65a and a ball screw 65b rotationally driven by the electric motor 65a. The electric motor 65a is a motor with a brake. The right machining motor 63 is installed on the front surface of the moving table 62 . The cutting tool attached to the right machining motor 63 faces left in the X-axis direction.

As shown in FIG. 3, the machine tool 1 is provided with tool changers 47 and 57 at appropriate positions. A plurality of cutting tools are exchangeably held in each of the tool changers 47 and 57 .

The gripper device 20 includes a gripper 21 and an adjustment mechanism 23 for adjusting the position of the gripper 21 in the Z-axis direction, as shown in FIG. The gripper 21 is provided at the tip of a support rod 22 that is supported by a base 22a and extends in the Y-axis direction. The gripper 21 can grip the rear end of the shaped steel W, for example, the rear end of the web 2b. The gripping of the shaped steel W by the gripper 21 is continuously performed not only during cutting but also during transport of the shaped steel W to the processing position P.

The adjustment mechanism 23 includes linear guides 23a, 23a that guide movement of the base 22a in the Z-axis direction, an adjustment cylinder 23b connected to the base 22a, and a magnetic sensor 23c that detects the position of the base 22a. I have. The adjusting cylinder 23b is, for example, a hydraulic cylinder. When the adjusting cylinder 23b is actuated, the height of the base portion 22a is changed with respect to the base portion (not shown) of the gripper device 20 depending on the direction of actuation. The operation control of the adjustment cylinder 23b is performed by the control of the control section 24 based on the detection value of the magnetic sensor 23c. The base portion is provided with a moving mechanism (not shown) for moving on the conveying path 3 . Movement control by the movement mechanism is performed under the control of the control section 24 . When the first table 13 moves in the Y-axis direction, the control unit 24 receives a synchronization signal from the control panel 7 and controls movement of the base portion by the movement mechanism. That is, the control unit 24 moves the base part (and thus the gripper device 20) so that the moving direction and moving speed (moving amount) are the same as the moving direction of the first table 13 and at the same speed (same moving amount). control the mechanism. Accordingly, when the first table 13 moves in the Y-axis direction, the gripper device 20 moves in the Y-axis direction in synchronization with the movement. Further, the control unit 24 receives a transport signal from the control panel 7 and controls the movement of the base so that the shape steel W is transported to the processing position P. As shown in FIG.

As shown in FIG. 3, the saw blade unit 80 is arranged on the downstream side in the conveying direction, which is the rear side of the base 11 . The saw blade unit 80 includes a saw blade 83 for cutting the shaped steel W to a predetermined length. The saw blade 83 is rotationally driven by an electric motor (not shown) of a moving body 82 provided in the saw blade unit 80 . The moving body 82 is configured to be moved in the X-axis direction by driving a moving motor 84, and by moving in the X-axis direction, the saw blade 83 cuts the shape steel W after cutting to a predetermined length. disconnect.

The control panel 7 includes a CPU that executes programs and controls various peripheral devices, a ROM in which cutting programs are written, a RAM that stores input data, etc., and data such as cutting lengths and drilling patterns. Equipped with input/output interfaces for connecting to panels, key switches, and external devices. The input/output interfaces include limit switches and rotary encoders (not shown) provided in the first table 13, the second tables 14, 14, the gripper device 20, the upper processing device 40, the left processing device 50, and the right processing device 60. Signals for state detection and position detection from sensors are input. Further, from the input/output interface, movement and stop command signals and drive control signals to the first table 13, the second tables 14, 14, the gripper device 20, the upper processing device 40, the left processing device 50, and the right processing device 60 etc. is output.

Next, the operation of machining a long hole or the like using the machine tool 1 will be described with reference to the shaped steel W shown in FIG. The shape steel W is conveyed on the conveying path 3 (see FIG. 3) by the gripper device 20, and is clamped by the left and right vices 30, 30 at the processing position P (see FIG. 3). In FIG. 5, only the right holding portion 31b and the holding lever 34 are shown. In addition, in the description, FIG. 1 will be referred to as appropriate for each part of the upper processing device 40, the left processing device 50, and the right processing device 60. As shown in FIG. The first table 13 is arranged with a predetermined position on the upstream side in the transport direction as an initial position.

First, as shown in FIG. 5, the effect of forming an L-shaped elongated hole 71 in a side view in the left flange portion 2b of the shaped steel W will be described.
First, the left pedestal 51 of the left processing device 50 is moved in the X-axis direction toward the shaped steel W, and the moving table 52 is moved in the Z-axis direction. It is cut by Note that the first table 13 is stopped at the initial position during the cutting of the elongated hole 71a.

After that, the first table 13 is moved in the Y-axis direction, and the cutting tool 58 cuts the horizontally long hole 71b extending in the Y-axis direction. During cutting of the laterally elongated hole 71b, the gripper device 20 moves in synchronization with the movement of the first table 13 in the Y-axis direction while the gripper 21 grips the rear end portion of the shaped steel W. As shown in FIG.

After that, when the cutting of the long hole 71 is completed, the left and right vices 30, 30 are opened, and following this opening, the gripper device 20 sends out the shaped steel W toward the saw blade unit 80 on the downstream side in the conveying direction. After the shaped steel W is delivered to the cutting position by the saw blade 83, the saw blade 83 is driven to cut the shaped steel W to a predetermined length. When the shape steel W is long, the shape steel W is continuously transported to the processing position P by the gripper device 20, and the above cutting process is repeated.

Next, the effect of forming the round large hole 72 in the side view in the left flange portion 2b of the shaped steel W will be described.
In this case, the left pedestal 51 of the left processing device 50 is moved in the X-axis direction toward the shaped steel W, and the moving table 52 is moved in the Z-axis direction, while the first table 13 is moved in the Y-axis direction. Then, the cutting tool 58 is moved along the circular outer edge 72c for cutting. The cutting start position of the cutting tool 58 may be any position inside the outer edge 72c, such as the central position 72a, the rear position 72b, and the front position 72d.

During the cutting of the large hole 72 , the gripper device 20 moves in synchronism with the movement of the first table 13 in the Y-axis direction while the gripper 21 grips the rear end of the shaped steel W.

When the cutting of the large hole 72 is completed, the left and right vices 30, 30 are opened, and the shaped steel W delivered to the saw blade unit 80 is cut to a predetermined length by the saw blade 83. When the shape steel W is long, the shape steel W is continuously transported to the processing position P by the gripper device 20, and the above cutting process is repeated.

Next, the effect of forming the round hole 73 in plan view, which is smaller than the large hole 72, in the web 2a of the shaped steel W will be described.
In this case, the upper pedestal 41 of the upper processing device 40 is moved in the X-axis direction, while the movable table 42 is moved in the Z-axis direction, the first table 13 is moved in the Y-axis direction to form a round shape. Cutting is performed by moving the cutting tool 48 along the outer edge 73c. The cutting start position of the cutting tool 48 may be any position inside the outer edge 73c, for example, the central position 73a or the rear position 73b.

In this case also, the gripper device 20 moves in synchronization with the movement of the first table 13 in the Y-axis direction while the rear end portion of the shaped steel W is held by the gripper 21 during the cutting of the intermediate hole 73 . do.

When the cutting of the middle hole 73 is completed, the left and right vices 30, 30 are opened, and the shaped steel W fed to the saw blade unit 80 is cut by the saw blade 83 to a predetermined length. When the shape steel W is long, the shape steel W is continuously transported to the processing position P by the gripper device 20, and the above cutting process is repeated.

In the machine tool 1 of the present embodiment described above, when cutting the shaped steel W, the left and right vices 30, 30 can move in the conveying direction of the shaped steel W while holding the shaped steel W therebetween. A long hole or the like extending in the direction (Y-axis direction) can be machined. When the cutting of the shaped steel W is completed, the shaped steel W can be moved in the conveying direction by the gripper 21 in succession to the operation of releasing the clamped shape steel W by the left and right vices 30 , 30 . Work to re-grasp the steel W becomes unnecessary. Therefore, the machining cycle time can be shortened. This contributes to a reduction in processing costs.

Further, since the gripper 21 is provided in the gripper device 20 that can move in the conveying direction of the shaped steel W, the synchronization of the movement of the left and right vices 30, 30 and the movement of the gripper 21 can be realized with a simple configuration.

In addition, since the shape steel W can be transported along the transport path 3 by the gripper device 20 while synchronizing the movements of the left and right vices 30 and 30 with the movement of the gripper 21, even when the shape steel W is long, continuous can be used for cutting.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and each constituent element can be changed as appropriate without departing from the gist of the present invention.
For example, in the above-described embodiment, each of the second tables 14 is moved in the X-axis direction by the cylinder device 14a. The shape steel W may be sandwiched between 30, 30.

Also, although the cylinder device 14a is shown to be hydraulically operated, it is not limited to this, and other cylinder mechanisms such as pneumatic cylinders or other actuators may be used as appropriate.

Also, although the first table 13 has been shown to be moved in the Y-axis direction by a moving mechanism including an electric motor 13a and a ball screw 13b, it is not limited to this, and other actuators may be used as appropriate. good.

Further, in the above-described embodiment, the H-section steel was described as an example of the section steel W, but it is not limited to this, and the C-section steel in which the flange portions extend in one direction up and down from the left and right ends of the web. , the same effects as in the present embodiment can be obtained.

1 machine tool 3 H-shaped steel (steel)
3a web 10 saw blade unit 11 saw blade 20 clamp device 21 upper clamp part 21b piston rod (rod)
22 Lower side clamp part 23 Impact absorbing member S1 Planned cutting line

Claims (2)

It is provided on a conveying path for conveying a work material, and moves along the conveying path by grasping the rear end of the work material to a cutting position for cutting and a cutting position for cutting downstream of the cutting position. a gripper that conveys the workpiece ;
a vise that clamps the workpiece transported to the cutting position;
a saw blade disposed at the cutting position for cutting the workpiece transported to the cutting position into a predetermined length, the machine tool comprising:
During cutting of the work material,
The vise can move in the movement direction of the gripper while holding the workpiece, and the gripper can move in synchronization with the movement of the vise while gripping the workpiece. It is movable on the conveying path ,
After the cutting process, the gripper conveys the work material to the cutting position by moving on the conveying path while continuously gripping the work material, and also grips the work material during the cutting process. A machine tool characterized by being able to continue . 2. A machine tool according to claim 1, wherein said gripper is provided in a gripper device movable on said conveying path .

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