JP2010064193A - Machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove chips accumulated by entwining around a tool and its periphery without requiring manual work and a complicated mechanism, and to save a space necessary for preparing a lathe device. <P>SOLUTION: A plurality of lathe tool holders 33 are arranged in a line in the front and back direction along a right edge section of a front-and-back direction moving route of a headstock 14. Each lathe tool holder 33 has a flat front side face 53 and a rear side face 54 which respectively cross the front and back direction at a right angle. A recessed section 61 extending in the right and left direction along the front side face 53 of each lathe tool holder 33 and having opened left end and closed right end is formed on the front side face 53 of each lathe tool holder 33, and the whole lathe tool holders 33 are overlapped in the front and back direction. The recessed section 61 of the lathe tool holder 33 at the front end is covered by a cover 72. A chip removing fluid nozzle 81 is prepared at the right end section of each recessed section 61. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a machine tool that holds a plurality of turning tools in parallel and performs turning, for example, a machine tool that performs combined machining of turning and grinding on the inner diameter of one workpiece.

  In machine tools that rotate workpieces and perform turning, it is common to use a single turning tool for multiple workpieces. However, chips generated during the previous machining are entangled with the turning tool and the next workpiece is machined. Occasionally, the workpiece may be scratched, or it may enter between the cutting edge of the turning tool and the workpiece turning point, impairing the turning and deteriorating the machining accuracy. It was.

  Such machine tools are known to have a plurality of turning tools arranged in parallel. However, in order to secure a work space for removing chips, it is necessary to secure a space between the turning tools.

  Also, when exchanging a turning tool, it is necessary to clean and remove chips that are entangled with the turning tool and its surroundings.

  As a machine tool having this type of function, the headstock is movable in the front-rear direction and the left-right direction, and a plurality of turning tool holders are provided along the right edge of the front-rear direction movement path of the headstock. Each turning tool holder supports a turning tool with its cutting edge facing to the left, and a chip removal plate is attached to span all the turning tool holders. The chip removal plate is movable so that it can move closer to and away from the cutting edge of the turning tool supported by the turning tool holder, and the chip removal plate has a through-hole that allows the cutting edge of the turning tool to protrude and retract. (For example, refer to Patent Document 1 and Patent Document 2).

In this machine tool, a support mechanism for movably supporting the chip removal plate and a moving mechanism for moving the chip removal plate are essential. This complicates the structure of the device and requires a space for installing the device.
Japanese Utility Model Publication No. 4-67905 Shokai 55-156802

  The object of the present invention is to provide a machine tool capable of removing the tangled and accumulated chips around the tool and its surroundings without requiring manual work or a complicated mechanism, and saving the space for installing the turning device. There is to do.

  In the machine tool according to the present invention, the left head stock and the right tool stock are provided on the bed so as to be relatively movable in the front-rear direction and the left-right direction, and a plurality of turning tool holders are provided in the front-rear direction. They are arranged in a line, each turning tool holder is supported by a turning tool with its cutting edge facing leftward, and each turning tool holder is a flat shape that is orthogonal to the front-rear direction. It has a front side and a rear side, and a recess is formed on the front side of each turning tool holder, extending along the left and right direction and opening the left end, and closing the right end. Of the tool holders, with the exception of the front end turning tool holder, all the turning tool holders are moved back and forth so that the recesses of the remaining turning tool holders are covered by the rear side of the adjacent turning tool holder. Overlapping Are, recess turning tool holder at the front end is covered by a cover, in which the chip removing fluid nozzle is provided at the right end of the recess.

  In the machine tool according to the present invention, chips can be automatically removed by a simple operation of supplying fluid to the chip removal fluid nozzle as required. The configuration for this is also simple. Furthermore, since all the turning tool holders are arranged in an overlapping state, the installation space can be saved as compared with the case where the same number of turning tool holders are arranged at intervals. Accordingly, the number of turning tool holders can be increased.

  According to this invention, it is possible to remove tangled and accumulated chips around the tool and its surroundings without requiring manual work or complicated mechanisms, preventing deterioration of machining accuracy or damage to the workpiece due to chips, and turning. There is provided a machine tool that can shorten the time required for setup change because it does not need to be cleaned when changing tools, and can save space for installing a turning device.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the following description, front and rear (X-axis direction) refers to the lower side of FIG. 1 as the front and the opposite side as the rear, and left and right (Z-axis direction) refers to the left and right sides as viewed from the front Let's say.

  Referring to FIG. 1 in which the machine tool is viewed from the top, a cutting table 12 is supported on the upper left side of the bed 11 so as to be movable in the X-axis direction. A table 13 is supported on the cutting table 12 so as to be movable in the Z-axis direction. A headstock 14 is mounted on the table 13. A spindle 15 extending in the left-right direction is supported on the spindle stock 14. A chuck 16 that holds the workpiece W is provided at the right end of the spindle 15.

  On the upper right side of the bed 11, a grinding device 21 and a turning device 22 on the tool table 20 and a transport device 23 are sequentially arranged from the rear to the front.

  FIG. 2 shows the turning device 22 in detail. On the fixed base 31, two holders 33 that respectively support the turning tools 32 are supported side by side.

  Each turning tool 32 includes a round bar-shaped shank 41 and a cutting edge 42 protruding leftward from the shank 41.

  Each holder 33 includes a rectangular parallelepiped block-shaped holder body 51 that is long on the left and right, and a vertical end plate 52 that is superimposed on the right end surface of the holder body 51. The holder main body 51 has a vertical flat front side surface 53 and a rear side surface 54 that are orthogonal to the front-rear direction.

  In the middle of the height of the front side surface 53, a recess 61 is formed that accommodates the shank 41 with the cutting edge 42 of the tool 32 protruding leftward. The recess 61 has a substantially U-shaped cross section that extends in a horizontal straight line in the left-right direction and opens forward. The left end of the recess 61 is open, but the right end is closed by the end plate 52. Three turning tool clamping bolts 62 are screwed into the top wall of the recess 61 in a vertically penetrating manner.

  The front side surface 53 of the holder main body 51 of the rear holder 33 and the rear side surface 54 of the holder main body 51 of the front holder 33 are overlapped with each other. As a result, the opening of the recess 61 of the rear holder 33 is closed. In this state, a fluid passage 71 is formed around the shank 41 in the recess 61. A vertical plate-like cover 72 is covered on the rear side surface 54 of the holder main body 51 of the front holder 33. Thereby, like the rear holder 33, the opening of the recess 61 of the front holder 33 is closed, and a fluid passage 71 is formed around the shank 41 in the recess 61.

  Left and right through-hole nozzles 81 are formed in the end plate 52 of each holder 33. The nozzle 81 is connected to a pipe 82 for supplying a chip removal fluid thereto. The chip removal fluid is optimally pressurized air, but may be a liquid such as a coolant.

  Subsequently, the operation of the present invention will be described. After turning a single workpiece, a series of processes for grinding is performed on a plurality of workpieces. While turning is completed and grinding is being performed, or while the machined workpiece held on the headstock chuck is being replaced with an unmachined workpiece using the conveyor 23, it is supplied to the pipe 82. The fluid is ejected from the nozzle 81.

  The fluid ejected into the recess 61 through the nozzle 81 passes through the recess 61 and is sprayed from the left end of the recess 61 toward the cutting edge 42. As a result, the cutting edge 42 and the surrounding chips are cleaned and removed.

  In the above, the number of holders and tools supported by the holder may be three or more. Also in that case, all the holders are overlapped in the front-rear direction. The machine tool may be a normal lathe that does not have a grinding device. Further, the tool rest may be movable instead of the head stock, or the head stock and the tool may move in different directions.

1 is a plan view of a machine tool according to the present invention. It is a perspective view of the turning apparatus of the machine tool.

Explanation of symbols

14 Headstock
33 Tool holder
53 Holder front side
54 Rear side of holder
61 recess
72 Cover
81 nozzles

Claims (1)

  The left spindle stock and the right tool stock are provided on the bed so as to be relatively movable in the front-rear direction and the left-right direction, and a plurality of turning tool holders are arranged in a line in the front-rear direction on the tool stand. Each turning tool holder supports a turning tool with its cutting edge directed to the left, and each turning tool holder has a flat front side and a rear side that are orthogonal to the front-rear direction. A recess is formed on the front side of each turning tool holder, extending in the left-right direction along this direction and opening the left end, and closing the right end. Except for the turning tool holder, all turning tool holders are stacked in the front-rear direction so that the recesses of the remaining turning tool holders are covered by the rear side of the turning tool holder adjacent to the front side of the turning tool holder. Lathe Recess of the holder is covered by the cover, the machine tool that is chip removing fluid nozzle provided at the right end of the recess.

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