JPH04128134U - NC lathe with tool changer - Google Patents

Abstract

(57) [Summary] [Purpose] A main tool changer 15 comprising an intermediate pot 17 and a tool change arm unit 16 that can rotate in correspondence with the rotary tool shafts 7 and 8 for front and side machining of the turret 6.
is provided on the NC-driven carrier 14 to enable rapid tool exchange with no difference in tool exchange time for both rotary tool axes. [Structure] Tool exchange between the magazine pot 11 of the magazine device 9 provided on the tailstock side of the machine and the intermediate pot 17 of the main tool changer 15 is performed by the sub tool changer 21, and the main tool changer 15 With the next tool inserted into the intermediate pot 17, the intermediate pot axis is oriented in the direction of the axis of the rotary tool for side machining, if necessary, and it is on standby at the right end position of the Z-axis. An arbitrary optimal Z-axis exchange position is automatically set from the current Z-axis position of the tool post by the NC tool exchange command, and the main tool exchange position 15 and the tool post 5 are automatically set.
are simultaneously moved and positioned to the optimum Z-axis exchange position, and the tool exchange is performed by the exchange arm 18.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to an NC lathe equipped with a tool changer (hereinafter referred to as ATC). be.

0002

[Conventional technology]

Conventionally, the technology of JP-A-60-56840 was added to the technology known as an NC lathe with ATC. There is. As shown in Figure 4, this is installed on the tailstock side of the bed and is A plurality of magazine pots 101 that store tools facing the shaft side can be used for tool exchange as needed. A tool magazine device that indexes to the tool changing position E, and a position B above the tool changing position E and the drip. An intermediate pot provided on a carrier 103 that can be moved to position A above the pot 102 104, an intermediate pot 104 at the B position and a magazine pot 101 at the E position. The tool exchange between the intermediate pot 104 at the A position and the tab The exchange arm 1 fixed to the magazine frame 106 allows tool exchange between the 07.

0003 Another known technique is the technique disclosed in Japanese Patent Application Laid-Open No. 61-95793. This thing is a figure 5, the tool exchange between the drum-shaped tool magazine 111 and the turret 112 is performed. At both ends of the twin-arm type exchange arm 113, 45° to the arm rotation axis is attached. and has a rotating mounting surface with an intersecting angle of 90° on both sides, and is installed in a direction perpendicular to this mounting surface. The gripper mount 114 is attached to the center axis of the rotation at 45° to the axial direction. A gripper 115 having a tool attachment center line is provided to connect the tool magazine 111 and the turret. By rotating the gripper mounting base 114 by 180° corresponding to the tool mounting direction of 112, The gripper 115 can be moved in a direction parallel or perpendicular to the arm rotation axis. It is.

0004

[Problem that the idea aims to solve]

The technology of Japanese Patent Application Laid-open No. 60-56840 described in the conventional technology is to insert and remove tools. Since the direction is single, the tool position arrangement of the turret 102 is simplified and the Y-axis function The problem is that it is not compatible with

[0005] In addition, the technology of JP-A No. 61-95793 uses a gripper to control the direction in which the tool is inserted and removed. It is possible to change the direction in two directions by rotating the mounting base 114 by 180 degrees, but the Two sets of drive means are required to insert and remove the tool, which becomes complicated and costly. In both cases, it is difficult to increase the rigidity of the gripper rotation mechanism due to space limitations, so heavy tools are The problem is that it is unsuitable for replacement.

[0006] In addition, in both cases, the Z-axis tool change position of the turret is limited to one location on the tailstock side. Therefore, the tool post must be returned from the machining completion position to the Z-axis tool change position, and the tool The Z-axis movement time of the tool rest during replacement affects the ATC time, making it unsuitable for long lathes. There was a problem.

[0007] The present invention was devised in view of these problems of the conventional technology. The purpose of this is to be suitable for long lathes and to be placed on the outer peripheral surface and end surface of the turret. Quickly and easily position the rotary tool axis for face machining and the rotary tool axis for side machining at any position. We are trying to provide an NC lathe with ATC that can change tools in the same amount of time. It is something that

[0008]

[Means to solve the problem]

In order to achieve the above object, the NC lathe with a tool changer according to the present invention has a A turret that can be pivoted in a vertical plane and indexed into cutting and tool change positions. This is a composite NC lathe that has a rotary tool shaft for front machining and a rotary tool shaft for side machining. A plurality of tools are installed on the tailstock side of this machine and store tools facing away from the main shaft in the Z-axis direction. A tool magazine device that indexes the magazine pot to the tool exchange position as needed, and this machine A carrier installed movably along the Z-axis guide of the beam installed above. a, an NC-controlled drive means for driving the carrier, and a drive means for driving the carrier in the Y-axis direction. The rotary tool axis for front machining and the rotary tool axis for side machining are connected around the rotation center axis. A tool exchange arm unit that is rotatable in two directions and has an exchange arm, and an intermediate a main tool changer comprising a pot, and a main tool changer comprising a main tool changer between the intermediate pot and the magazine pot; This includes a sub-tool changing device having a sub-arm for changing tools.

[0009]

[Effect]

The sub arm of the sub tool changer allows the next tool to be moved from the magazine pot of the tool magazine device. After removing the tool and inserting it into the intermediate pot, the main tool changer waits on the magazine side. Machine. If the next tool is to be inserted into the rotating tool shaft for side machining, During standby, the intermediate pot and tool change arm unit rotate 90 degrees to take the corresponding posture. Ru. When a section of cutting is completed and a tool change command is issued from the NC, the machining is finished. The optimum Z-axis tool change position is set based on the current Z-axis position of the tool post, and the tool post and main tool exchange position is set. The changing device is simultaneously moved at a rapid traverse speed toward this optimal Z-axis tool changing position and Determined and exchangeable arm allows the use of the intermediate pot's next tool and the turret's rotating tool axis A tool change is performed for a completed tool.

0010

【Example】

Examples will be described with reference to FIGS. 1 to 3. In the composite NC lathe shown in Fig. 1, the headstock 1 is installed on the right side of the bed installed on the floor. The chuck 3 is fitted onto the tip of the main spindle 2 which is rotatably supported on the headstock 1. It is worn. There are two sets of Z-axis guides on the bed, and the upper Z-axis guide has A carriage 4 having an axial guide surface is mounted so as to be movable and positionable. A tool rest 5 is mounted so as to be movable and positionable.

[0011] A turret 6 is provided to be able to rotate around a rotation axis in the X-axis direction provided on the tool rest. There are multiple rotary tool mounting positions on the outer peripheral surface and end surface of the turret 6. It is being Then, the rotary tool shaft 7 for side machining is placed at the rotary tool mounting position on the outer peripheral surface. However, the rotary tool shaft 8 for side machining is also rotated at the rotary tool mounting position on the end face. The tailstock 10 is movably supported on the Z-axis guide under the bed. It is.

0012 On the other hand, a tool magazine device 9 is installed on the right side of the bed. Placement 9 is a magazine pot 11 that stores a plurality of tools T facing right in the Z-axis direction. The servo motor 12 connects the magazine endlessly with a chain. The cut 11 is indexed to the MG tool exchange position.

[0013] A beam 13 is installed above the bed, facing the Z-axis direction, and A carrier 14 is mounted movably along a guide in the direction, and the carrier 14 is It is driven by a large servo motor via a ball screw.

[0014] The exchange arm unit 16 of the main tool exchange device 15 is mounted on the carrier 14 in a vertical and flat manner on the Y axis. The figure shows an exchangeable arm unit 16 that can be rotated and indexed by 90 degrees in a plane. It passes through the tip of the center axis of rotation in the Y-axis direction and the carrier 14 and protrudes slightly upward. are doing. At the tip of this pivot axis, an intermediate pot 17 is attached for rotation of the exchange arm 18. It is fixed parallel to the rotation axis and facing the exchange arm side.

[0015] The exchange arm 18 is twin-shaped with grippers at both ends, approximately 90° and 180°. It can be rotated in the direction of the rotation axis and can be inserted and removed in the direction of the rotation axis. And this main tool exchange The device 15 moves the carrier 14 toward the magazine side to the right end predetermined tool transfer position and the main Move to the axis side to locate the tool change position specified by the NC corresponding to the Z-axis position of turret 6. It is now decided.

[0016] A sub-tool exchange device that transfers tools between the magazine pot 11 and the intermediate pot 17 The sub-arm 22 of the position 21 is connected to two Z-axis direction sub-arms provided within the magazine frame. The MG side replacement position corresponding to the magazine pot 11 along the guide rod 20 and the right end in the Z-axis direction Move to the RS side exchange position corresponding to the intermediate pot 17 positioned at the tool transfer position. It is possible to insert and remove tools, and also to guide in the X-axis direction (not shown). It is possible to move along the tool for gripping the tool.

[0017] Next, the operation of this embodiment will be explained. When the next tool command is issued from the NC, the magazine is loaded with the specified tool T as the next tool. The tool pot 11 is indexed to the MG tool exchange position, and the sub arm 22 is indexed to the Move forward to the gin pot side and grasp the next tool T.

[0018] Next, the sub-arm 22 moves in the Z-axis direction opposite to the main shaft, and the next tool T is placed in the magazine pot. 11, and the sub-arm 22 retreats toward the pot on the side opposite to the magazine in the X-axis direction. Thereafter, it moves toward the main shaft in the Z-axis direction and is positioned at the RS side tool exchange position. next Then, the sub-arm 22 advances toward the intermediate pot in the X-axis direction, and the next tool T to be gripped moves toward the intermediate pot. It is concentric with the pot 17, moves toward the spindle in the Z-axis direction, and places the next tool T in the intermediate pot 17. The sub-arm 22 moves back in the X-axis direction and separates from the next tool, and the main tool is replaced. The device 15 waits in this state until a tool exchange command is issued from the NC.

[0019] A cutting process using a tool installed on the rotary tool shaft 7 for front machining of the outer peripheral surface of the turret 6 When the division is completed, the turret 6 rotates and the rotary tool shaft 7 is indexed to the tool exchange position. , the tool rest 5 is moved in the X-axis direction and positioned at a predetermined tool exchange position, and the The optimum Z-axis tool change position is automatically set from the current Z-axis position of the tool rest 5, and the NC tool When a replacement command is issued, the carrier 14 and the tool rest 5 simultaneously move on the Z axis and approach each other, automatically It is positioned at the set Z-axis tool exchange position. Next, the exchange arm 18 is approximately 9 The next tool T of the intermediate pot 17 and the used tool 7 of the rotary tool shaft 7 are rotated by 0° and are grasp sometimes.

[0020] Next, the exchange arm 18 extends in the direction of the rotation axis and holds both tools with the intermediate pot 17. Then, the tool is removed from the rotary tool shaft 7, rotated 180 degrees, and the positions of both tools are swapped. The exchange arm 18 contracts in the direction of the rotation axis, and the next tool is placed on the rotary tool axis 7, and the used tool is placed inside. After being inserted into the intermediary pot 17, the exchange arm 18 rotates approximately 90 degrees to remove both tools. leave.

[0021] Next, the tool rest 5 moves toward the main shaft in the Z-axis direction and begins cutting, and at the same time, the carriage A 14 moves toward the magazine in the Z-axis direction and is positioned at the right end tool transfer position. Next, the sub-arm 22 of the sub-tool changer 21 moves forward in the X-axis direction to remove the used tool. Grip it, move it to the right in the Z-axis direction, and pull out the used tool from the intermediate pot 17.

[0022] Next, the sub-arm 22 retreats in the X-axis direction, moves to the right in the Z-axis direction, and moves to the M The sub-arm 22 is positioned at the G-side tool exchange position, and the sub-arm 22 moves forward in the X-axis direction again to grasp the tool. The used tool T held is concentric with the magazine pot 11 and moves to the left in the Z-axis direction. After inserting the used tool into the magazine pot 11, move it back in the X-axis direction and insert the used tool into the magazine pot 11. Stay away from tools.

[0023] Next, the used tool T attached to the rotary tool shaft 8 for side machining of the turret 6 is transferred to the next tool. When exchanging with T, the main tool changer 15 waits at the tool transfer position at the right end in the Z-axis direction. During the machine, the exchange arm unit 16 and intermediate pot 17 are rotated 90 degrees and the next tool is inserted. T faces in the direction corresponding to the side surface machining rotary tool axis 8 facing forward in the X-axis direction. and NC's With the tool change command, the carrier 14 moves to the left in the Z-axis direction, and the turret 5 moves to the right in the Z-axis direction. Simultaneously approach each other at rapid traverse speed and perform arbitrary optimal Z-axis tool intersections set in the NC. position.

[0024] Then, as shown in FIG. The next tool T is inserted into the rotary tool shaft 8 by inserting and removing the tool in the axial direction, and the used tool T is inserted into the rotary tool shaft 8. After being inserted into the intermediate pot 17, the exchange arm 18 rotates 90 degrees and separates from both tools. It will be done.

[0025] Next, the tool rest 5 moves toward the main shaft in the Z-axis direction and begins cutting, and at the same time the carrier 14 is moved to the right side in the Z-axis direction and positioned at the tool transfer position, and the exchange arm unit is The pot 16 and the intermediate pot 17 are rotated 90 degrees so that the used tool T faces to the right in the Z-axis direction. , the used tool T is returned to the magazine pot 11 by the same movement of the sub arm 22 as described above. reject

[0026] It should be noted that when the tool rest 5 and the main tool exchange position 15 are being synchronously fed to the same side in the Z-axis direction, the exchange tool It is also possible to shorten the ATC time by performing the tool change operation using the system 18. Wear.

[0027]

[Effect of the idea]

Since the present invention is configured as described above, it produces the following effects. Tool exchange between the magazine pot facing right in the Z-axis direction and the intermediate pot on the carrier Use the sub-tool changer to replace the intermediate pot and tool change arm into which the next tool has been inserted. The turret is held at an angle to the rotary tool for front or side machining, and N Automatically set from the current position of the Z-axis of the tool post at the end of machining with the tool change command in C. The tool post and carrier can be approached at the same time at a rapid traverse speed to any optimal Z-axis tool change position. The tool can be exchanged between the intermediate pot and the rotating tool axis of the turret using the exchange arm. As a result, the tool exchange between the rotary tool axis for front machining and the rotary tool axis for side machining is There is no difference in tool change time, and tools can be changed in the shortest possible time.

[0028] In addition, the tool magazine device is installed on the tailstock side of the machine, so the operator can This improves work efficiency by making it easier to donate to and from the magazine. Furthermore, the turret Tools are exchanged using the exchange arm while the main tool changer is synchronously feeding in the same direction. By doing so, the tool change time can be further shortened, which is particularly effective for long lathes.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an NC lathe with a tool changer according to the present embodiment.

FIG. 2 is a perspective view showing the tool changing posture of the turret of the main tool changing device of the present embodiment with respect to the rotary tool axis for front machining.

FIG. 3 is a perspective view showing the tool changing posture of the turret of the main tool changing device of the present embodiment with respect to the rotary tool for side machining.

FIG. 4 is an explanatory diagram of a conventional automatic tool changer.

FIG. 5 is a diagram illustrating a conventional composite machining NC lathe.

[Explanation of symbols]

6 turret 7 Rotary tool axis for front machining 8 Rotary tool axis for side machining 9 Tool magazine device 11 Magazine pot 13 Beam 15 Main tool change device 16 Tool exchange arm unit 17 Intermediate pot 18 Exchange arm 21 Sub-tool changer 22 Sub arm

Claims (1)

[Scope of utility model registration request] Claim 1: A composite NC lathe having a rotary tool axis for face machining and a rotary tool axis for side machining in a turret that can be rotated in a plane perpendicular to the X-axis and indexable between a cutting position and a tool exchange position, A tool magazine device that indexes multiple magazine pots that are installed on the tailstock side of the machine and store tools facing away from the spindle in the Z-axis direction to the tool exchange position as necessary, and a beam that is installed above the machine. a carrier disposed movably along a guide in the Z-axis direction; an NC-controlled driving means for driving the carrier; and a main tool changing device including an intermediate pot and a tool changing arm unit which is provided so as to be pivotable in two directions corresponding to a rotary tool axis for side machining and has a changing arm, and which performs tool changing between the intermediate pot and the magazine pot. 1. An NC lathe with a tool changer, comprising: a sub-tool changer having a sub-arm.