JP2006255796A - Gantry type machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve working efficiency by shortening the traveling distance of a spindle head in tool replacement to eliminate a waste time. <P>SOLUTION: In this gantry type machine tool, a number of tool holders 22 are fitted to a mounting frame 20, and a cutting tool 23 is removably held on the tool holder 22. A cutting tool 10 of a spindle head 9 is controlled and moved to cut a work W on a table 2, and further replace the cutting tool 10. In the machine tool, the mounting frame 20 can be moved in the direction of an X-axis guide rail 3 to adjust and set the replacement position of the cutting tool 23. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gantry-type machine tool capable of quickly performing a cutting tool replacement operation and thereby performing a machining operation efficiently.

  FIG. 5 is an explanatory view showing an example of a conventional gantry type machine tool. In the figure, 101 is a main body frame 102 is a table 103 is a front and rear moving frame 105 disposed on the X axis guide rail 104 of the main body frame 110 is a left and right moving base 107 is disposed on the Y axis guide rail 106 of the front and rear moving frame 103 The lift head 109 provided on the Z-axis guide rail 108 of the moving base 105 is fixed to the lift head 107. The spindle head 110 is replaceable at the lower end of the spindle head 109 via an ATC device (not shown). Is a rotary cutting tool held in

  The machine tool has the following configuration. That is, reference numeral 111 denotes a mounting frame 112 fixedly provided at the rear position of the table 102. A large number of tool holders 113 arranged on the mounting frame 111 in the same direction as the Y-axis guide rail direction are detachable from each tool holder 112. It is a held cutting tool. The above-described and above-described cutting tools 110 and 113 are appropriately selected according to the machining content of the workpiece W attached to the table 102.

  In the above gantry-type machine tool, the cutting tool 110 of the spindle head 109 is controlled and moved in the three axis directions of the X axis, the Y axis, and the Z axis (front and rear, left and right, and upper and lower) with respect to the workpiece W fixed to the table 102. Then, the required cutting process is performed. Further, when performing multi-step machining with a plurality of cutting tools on the workpiece W, the spindle head 109 is controlled and moved to remove and store the cutting tool 110 in the empty tool holder 112, and the empty spindle head 109 is subsequently removed. The tool holder 111 to be used next is held corresponding to the cutting tool 113, and the machining operation is continued by so-called tool replacement.

  Now, in this type of machine tool, when machining a large workpiece corresponding to the table area, the rearward movement position of the cutting tool 110 and the position of the cutting tool 113 of the mounting frame 111 are close to each other, and the tool is changed. For this reason, the idling travel distance of the spindle head 109 is small. On the other hand, when processing a small workpiece W, it is recommended that the workpiece W be set in front of the table 102 from the viewpoint of ensuring safe and good workability. In this case, the idle running distance of the spindle head 109 required for tool change becomes very large.

Therefore, in the machining work in which the small work is performed in multiple steps throughout the day, there is a problem that the work efficiency is significantly lowered due to accumulation of dead time due to idle running. When trying to solve the problem by high-speed operation of the spindle head, problems such as increased wear of the machine and increased power consumption occurred, and favorable results were not obtained.
Nippon Building Materials Newspaper WOOD TECHNOLOGY JAPAN Vol.6 Woodworking Machine Graph No.5 (Volume 412) April 25, 2004

  The problem to be solved by the present invention is to shorten the idle running distance of the spindle head at the time of tool change and to improve the efficiency of machining operations.

  As a means for solving the problems, the gantry type machine tool of the present invention is characterized in that the mounting frame having the tool holder can be moved and adjusted in the direction of the X-axis guide rail.

  According to the gantry-type machine tool according to the present invention, the tool holder can be appropriately adjusted according to the size of the workpiece, that is, the position of the spindle head. For this reason, there is no extra movement of the spindle head, and work efficiency can be improved. Along with this, mechanical wear, power consumption, etc. can be kept low.

  The objectives of shortening the moving distance of the spindle head as much as possible and eliminating dead time when changing tools are realized simply and rationally with the following configuration.

  1 is a side view showing an embodiment of a gantry-type machine tool according to the present invention. FIG. 2 is a front view of the same. FIG. 2 is a side view of the same. FIG. DESCRIPTION OF SYMBOLS 1 is a main body frame 2 The horizontal table 3 provided in the upper surface part of the main body frame 1 The X-axis guide rail 4 arrange | positioned at the both right and left sides of the main body frame 1 4 The rectangle arrange | positioned so that the X-axis guide rail 3 was movable A frame-like front / rear moving frame 5 is a left / right Y-axis guide rail 6 disposed on the front / rear moving frame 4, and a left / right movement base 7 is movably disposed on the Y-axis guide rail 5. The disposed Z-axis guide rail 8 is an elevating / moving base that is movably disposed on the Z-axis guide rail 7.

  The front / rear moving frame 4, the left / right moving base 7, and the lifting / lowering base 8 are composed of well-known control driving means (servo motor, feed screw shaft driven by the servo motor, and nut body screwed to the feed screw shaft). And a computer (CNC control device) that controls and integrates the control and movement in the front-rear direction, the left-right direction, and the up-down direction.

  Reference numeral 9 denotes a spindle head 10 provided on the front surface side of the up-and-down moving base 8. A cutting tool 10 is held on the rotating shaft of the spindle head 9 via an ATC device (not shown). The cutting tool 10 is attached and detached by a computer control command signal.

  Reference numeral 20 denotes a beam-like mounting frame 22 in which slide bearings 21 on both sides are engaged with the X-axis guide rail 3 so as to be movable in the front-rear direction. ) Tool holders 23 are detachably held in the tool holder 22 (seven in the embodiment) and many cutting tools 24a to 24c are provided in the X-axis guide rail 3 (three in the embodiment) pin holes. Reference numeral 25 corresponds to the pin holes 24a to 24c, and a stopper pin 26 provided on the mounting frame 20 so as to be fitted to any one of the pin holes 24a is an operation handle of the stopper pin 25. In the case corresponding to ˜24c, the position detection switch outputs a signal.

  The configuration of the gantry type machine tool according to one embodiment is as described above. When the workpiece W on the table 2 is a large material as shown in FIG. Corresponds to the rearmost pin hole 24a. This position is set in consideration so that the cutting tool 10 of the spindle head 9 at that position does not interfere with the cutting tool 23 of the mounting frame 21 when the cutting range is up to the end of the workpiece W.

  By doing in this way, the moving distance of the spindle head 9 required for tool replacement can be shortened as much as possible, and the machining operation can be performed speedily. When the work W is a small material, the attachment frame 20 shown in FIG. 1 is moved forward in accordance with this, and the work W is set corresponding to the rear end position of the work W. This position setting can be selected from any of the two locations specified by the pin holes 24b and 24c.

  In the above embodiment, the mounting frame 20 is moved and adjusted by manual operation. However, well-known driving means (for example, a motor, a screw shaft in the Y-axis direction controlled by the motor, a screw shaft) If the nut body is screwed together, the position can be automatically set. When this method is used, although the cost is slightly increased, the position can be grasped numerically by a computer, which is effective in performing cutting by automatic control.

It is a side view showing an example of a gantry type machine tool. Similarly, it is a front view. Similarly, it is a front view which removes and shows a part of composition. It is explanatory drawing which shows the structure of a stopper pin and a pin hole. It is explanatory drawing which shows the structure of the conventional gantry type machine tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body frame 2 Table 3 X-axis guide rail 4 Back-and-forth movement frame 5 Y-axis guide rail 6 Left-right movement base 7 Z-axis guide rail 8 Lifting movement base 9 Spindle head 10 Cutting tool 20 Mounting frame 22 Tool holder 23 Cutting tool 24a Pin hole 24b Pin hole 24c Pin hole 25 Stopper pin 26 Handle W Work Sa detection switch Sb detection switch Sc detection switch

Claims (1)

A body frame provided with a table, a back-and-forth moving frame disposed on the X-axis guide rail of the body table, a left-and-right moving base disposed on the Y-axis guide rail of the back-and-forth moving frame, and a Z-axis movement of the left-and-right moving base A spindle head provided in a lifting / lowering base arranged on the base, a cutting tool held exchangeably on the spindle head, an attachment frame arranged at a rear position of the main body frame, and a Y arranged on the attachment frame Equipped with a large number of tool holders in the direction of the shaft guide rail and a large number of cutting tools removably attached to the tool holder, the cutting tool of the spindle head is controlled and moved to change the cutting tool and process the workpiece on the table. In a machine tool, the mounting frame is moved in the X-axis direction so that the exchange position of the cutting tool held in the tool holder can be adjusted. That gantry type machine tool.