JP3390073B2 - Turret for numerically controlled lathe - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turret tool post of a numerically controlled lathe, and particularly to various auxiliary means required for a numerically controlled lathe which is operated unattended for a long time. The present invention relates to a turret tool post of a numerically controlled lathe provided with a powder removing device. 2. Description of the Related Art A conventional lathe is not provided with a chip removing device, and chips generated by cutting are often entangled with a work or a tool and are often not easily removed. Had occurred. However, in ordinary processing, no special consideration was given to the fact that if the chips were removed from time to time, they would not cause any particular trouble. [0003] In the above-mentioned prior art, since no chip removing device is provided, chips are entangled with a work or a tool and can be easily removed during unattended operation for a long time. If there is no such condition, there is a situation that cannot be ignored, such as scratching the machined surface with cutting chips, or bending the work due to lump of chips when cutting the work and scratching the cut surface with tools Is starting to happen. [0004] It is an object of the present invention to provide a chip control device on a tool post of a numerically controlled lathe to eliminate the occurrence of trouble due to chip entanglement during long-time unmanned operation. [0005] To achieve the above object, the present invention provides a headstock that supports a main spindle that rotates while holding a workpiece, and a headstock that is parallel to and perpendicular to the centerline of the main spindle. A turret tool post having a plurality of tool holder mounting surfaces that are moved and rotated in the direction and are capable of mounting a plurality of tool holders, respectively, and a tool that is provided separately from the turret tool post and processes a workpiece. In a numerical control lathe including a tool post, a chip removing device having a chip guide plate for removing chips is provided on the tool holder mounting surface of the turret tool post, and the chip guide plate is gripped by a spindle. The tip portion has a width in the axial direction of the work, and a tip portion is removed so as to remove chips generated by machining with the tool of the tool rest provided separately from the turret tool rest. Characterized by being placed close to the rake surface of the upper surface of the tool. [0006] Since a chip removing device is provided on the tool holder mounting surface of the turret tool post, chips generated by cutting are prevented from sticking to a work or a tool, and chips during long-time unattended operation are prevented. It is possible to eliminate the occurrence of troubles due to tangling. An embodiment of the present invention will be described below with reference to FIGS. First, an outline of the configuration of a known numerically controlled lathe will be described. The conventional numerically controlled lathe is the Japanese
As shown in No. 9482, a headstock that supports at least a rotating spindle, and a tool rest that relatively moves in a direction parallel to and orthogonal to a centerline of the spindle with respect to the spindle, The workpiece held by the spindle is cut by a tool held by a tool post that moves relatively. This turret is often a turret turret, and usually has two or more turrets that are driven and controlled independently of each other in order to machine a work alternately. The numerically controlled lathe disclosed in Japanese Patent Publication No. 4-29482 has an opposing main spindle for back processing, but whether or not it has an opposing main spindle is irrelevant in the present invention. FIG. 1 shows an example of such a turret tool rest. The turret tool post 1 is moved by a Z-axis feed motor 2 in a Z-axis direction parallel to the center line of a main shaft (not shown), and is moved by an X-axis feed motor 3 in a direction perpendicular to the Z-axis direction.
Moved in the axial direction. An indexing shaft 4 is rotatably indexed on the turret tool rest 1, and the indexing shaft 4 is rotationally indexed in an A-axis direction by an A-axis rotating motor 5. A turret 6 having a polyhedral outer peripheral shape is fixed to the indexing shaft 4, and a plurality of tool holders 8 are fixed to a tool holder mounting surface 7 on the outer periphery of the turret 6 as shown in FIGS. 1 and 2. ing. A tool holder hole 9 for positioning the tool holder is formed on the tool holder mounting surface 7. FIG. 1 shows a tool holder 8A to which a cutting tool 10A is attached, and a tool holder 8B to which a center drilling tool 10B such as a drill is attached.
FIG. 2 shows a tool holder 8C to which a rotary tool 10C such as a drill and an end mill for horizontal hole drilling is attached. As shown in FIG. 2, a rotary tool drive shaft 15 extending into the turret 6 is rotatably supported on the indexing shaft 4 on the turret tool rest 1, and is provided inside the turret 6 of the rotary tool drive shaft 15. Is fixed to the rotary tool driving gear 16. The tool holder 8C includes a rotating tool holding portion 17 to which the rotating tool 10C is attached, a rotating portion that rotatably supports the rotating tool holding portion 17 and a fixed portion 18 fixed to the turret 6, and a rotating tool driving gear 16. And a driven gear 19 fixed to the rotating tool holder 17 so as to mesh with the driven gear 19. An end plate 20 is fixed to the front end of the turret 6, and the rotary tool drive shaft 15 is rotatably supported on the end plate 20 via a bearing 21. The above configuration is almost the same as the well-known configuration of the turret tool rest, and therefore, further description will be omitted. As shown in FIG. 2, a turning shaft 25 is fixed to the end plate 20. As shown in FIGS. 2, 3, 5, and 6, two turning shafts 25 are provided on the turning shaft 25. Fluid hole 2
6A and 26B are formed. One end of the fluid hole 26A on the end plate 20 side is sealed with a stopper 27, and the other fluid hole 26B is a blind hole.
It is formed shorter. As shown in FIGS. 5 and 6,
An annular fluid passage 28A is formed in the outer peripheral portion of the pivot shaft 25 inserted into the inner diameter of the end plate 20.
The portion of the annular fluid passage 28A corresponding to 6A is communicated with the fluid hole 26A by the fluid passage 29A. Swivel axis 25
The side portion pressed against the side surface of the end plate 20 of
An annular fluid passage 28B is formed, and a portion of the annular fluid passage 28B corresponding to the fluid hole 26B is communicated with the fluid hole 26B by a fluid passage 29B. On the other hand, on the tool holder mounting surface 7 of the turret 6, as shown in FIGS. 3, 5 to 7, every other two fluid passages 30A and 30B are formed. Fluid passages 31A, 31B and 32A, 32B are formed in the turret 6 and the end plate 20 so that 30A, 30B communicate with the annular fluid passages 28A, 28B, respectively. Here, the fluid passage 3
The tool holder mounting surface 7 of the turret 6 on which 0A and 30B are formed is hereinafter referred to as a detecting means mounting surface 7a for convenience of description. Of course, the tool holder 8 may be mounted on the detecting means mounting surface 7a to which the detecting means described later is not mounted, or the two fluid passages 30A, 30B may be mounted on all but not every other tool holder mounting surface 7. It is needless to say that it may be formed, or every third one may be formed. As shown in FIGS. 2 and 4,
The curl tubes 33 are respectively inserted into the fluid holes 26A and 26B.
A, one end of 33B is connected, curl tube 33A,
The other end of 33B is connected to a hydraulic or pneumatic source such as a hydraulic pump, a compressor, a vacuum pump, or the like via an electromagnetic valve (not shown). As shown in FIG. 2, a commercially available signal conversion circuit 40 is fixed to the turning shaft 25, and the input side of the signal conversion circuit 40 is connected to a receptacle mounting plate 41 fixed to the turning shaft 25. A plurality of mounted receptacles 4
2 are connected. The output side of the signal conversion circuit 40 is connected to a receptacle 44 mounted on a receptacle mounting plate 43 fixed to the pivot 25, and the receptacle 4
A connector 46 attached to one end of the curl cord 45 is connected to 4. The other end of the curl cord 45 is connected to a control unit of a numerically controlled lathe. A cover 47 is fixed to the turning shaft 25 so as to cover the signal conversion circuit 40, the curl tubes 33A and 33B, and the curl cord 45. Here, the rotation of the turret 6 is within one rotation, and the curl tubes 33A and 33B and the curl cord 4
5 is prevented from being twisted. In the above-described embodiment, the turning shaft 25 is provided so as to protrude from the turret 6, but it is obvious that the turning shaft 25 may be provided so as to be buried in the turret 6. As shown in FIGS. 8 and 9, one of the mounting surfaces 7a for detecting means of the turret tool post 1 and another tool post on which a tool for performing a cutting process is mounted, in this embodiment, A chip removing device 81 having a chip guide plate 80 for removing chips 82 is attached. Chip guide plate 80
Has a width in the axial direction of the work 60 gripped by the main shaft, and removes chips 82 generated by machining with the tool 50 of the tool rest provided separately from the turret tool rest 1.
The distal portion in proximity to the rake surface of the top surface of the tool 50 is placed. Therefore, when removing the chips 82, the turret 6 rotates in the A-axis direction, the chip removing device 81 is indexed to a predetermined position, and the chip removing plate 81 is moved in the X-axis and Z-axis directions. The tool 80 is positioned near the workpiece 60 chucked to a main spindle (not shown) or a back main spindle processed by the tool 50, and is cut by the cutting tool 50 held by another tool rest (not shown). Accordingly, the chips 82 flow along the chip guide plate 80, and the flow direction of the chips 82 changes to the direction flowing from the cutting tool 50 and the work 60.
Alternatively, the entanglement of the cuttings 82 on the work 60 is prevented. According to the present invention, a chip removing device having a chip guide plate for removing chips is provided on a tool holder mounting surface of a turret tool post, and the chip guide plate is attached to a main shaft. The tip portion has a width in the axial direction of the gripped work, and a tip portion is formed on a squeeze surface on the upper surface of the tool so as to remove chips generated by machining with a tool of the tool rest provided separately from the turret tool rest. close to formed by placement. That is, the chip guide plate is attached to the turret tool post, and is configured to eliminate chips generated by machining with the tool of the tool post separately provided from the turret tool post. Use and non-use can be selected, and the positional relationship between the chip guide plate and the tool of the tool rest can be adjusted. In addition, as described above, the chip guide plate is attached to the turret tool post, and is configured to eliminate chips generated by processing with the tool of the tool post separately provided from the turret tool post. Place the tool post parallel to the centerline of the spindle,
By moving and rotating in a direction orthogonal to the center line of the main shaft, operation control can be performed so that the tip of the chip guide plate can be made to approach substantially parallel to the outer peripheral surface of the work. For this reason, in a cutting process performed by bringing a tool of a turret tool rest and another tool rest into contact with a workpiece held and rotated by a main spindle, curling chips formed by a scooping surface provided behind a cutting edge of the tool. Is driven in the direction of the chip guide plate by the pressure of the cutting oil supplied from the cutting oil supply pipe provided on the side surface of the tool, and collides with the chip guide plate so that the flow direction of the chip is as shown in FIG. It can be changed in the direction of the arrow. As a result, chips generated by the cutting process are blown away from the work, so that the chips do not come into contact with the work, and entanglement of the chips with the work and damage to the surface of the work are prevented. The occurrence is prevented. In addition, since the tool and the chip guide plate are mounted on separate tool rests, the outer peripheral surface of the work reduced in diameter by the cutting amount of the tool is moved in a different position from the tool. Can be controlled, and the chip guide plate can be arranged at a position closest to the workpiece. This allows
Normally, the cutting surface provided behind the cutting edge of the tool turns into curled chips, but even if it breaks without a beautiful curl depending on the material of the work and cutting conditions, it is surely separated from the work Direction can be excluded.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view showing a schematic configuration of an embodiment of a turret tool post of a numerically controlled lathe according to the present invention. FIG. 2 is a sectional view showing a main part of the present invention. FIG. 3 is a sectional view taken along line AA of FIG. 2; FIG. 4 is a sectional view taken along line BB in the cover of FIG. 2; FIG. 5 is a sectional view taken along line CC of FIG. 3; FIG. 6 is a sectional view taken along line DD of FIG. 3; FIG. 7 is a plan view of a tool holder mounting surface. FIG. 8 is an explanatory front view of a main part of the present invention. FIG. 9 is an explanatory right side view of FIG. 8; [Description of Signs] 1 Turret tool post 6 Turret 7 Tool holder mounting surface 7a Detecting means mounting surfaces 8, 8A, 8B Tool holders 10A, 10B, 10C Tool 20 End plate 25 Rotating shaft 40 Signal conversion circuit 42, 44 Receptacle 45 Curl code 46 Connector 60 Work 81 Chip removal device 82 Chip

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Akihide Kanaya 840 Shimotomi, Tokorozawa-shi, Saitama Citizen Clock Company, Tokorozawa Office (56) References JP-A-62-130103 (JP, A) −125102 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23B 25/02 B23B 3/16 B23B 29/24 B23Q 11/00

Claims (1)

(57) Claims 1. A headstock for supporting a spindle that grips and rotates a workpiece, and a plurality of spindle heads that are moved in a direction parallel to and orthogonal to a centerline of the spindle and are rotated and driven. A turret tool post having a plurality of tool holder mounting surfaces each capable of mounting a tool holder, and a numerical control lathe including a tool post having a tool for processing a workpiece provided separately from the turret tool post; A chip removing device having a chip guide plate for removing chips is provided on the tool holder mounting surface of the turret tool post, and the chip guide plate has a width in an axial direction of a work held by a main spindle, to eliminate chips generated in machining by the turret tool post separately from the tool rest of the tool provided, that the tip was placed close to the rake surface of the upper surface of the tool The tool rest of numerically controlled lathe, characterized.