JPH04130134U - Tool change mechanism for angular attachment - Google Patents

Abstract

(57) [Summary] [Purpose] This ATC is compatible with the vertical spindle of this machine and the horizontal spindle of the 90° angular attachment.
Enables automatic tool change for 9. [Structure] The attachment stand 28 of the automatic attachment exchange device 21 is inserted into the tool exchange position as necessary, and the 30° angular attachment 1 on the stand 28 is inserted.
8 around the center axis of rotation by the fluid pressure cylinder 31.
degree to make the attachment spindle center in the same direction as the horizontal spindle, perform automatic tool exchange using the exchange arm 15, turn the stand 60 degrees in the opposite direction again to return to the previous position, and then move the attachment 18 to the spindle. Automatically attaches to ram 16.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is an automatic tool changer (hereinafter referred to as ATC) for both vertical and horizontal spindles. Angular attachment that enables automatic tool change for spindles other than ° This invention relates to a tool changing mechanism for attachments.

0002

[Conventional technology]

Conventionally, as shown in Fig. 5, ATC in relatively large double-column machining centers, etc. Now, either attach a 90° angular attachment to the spindle head 101 or Most machines are equipped with both vertical and horizontal spindles and are capable of machining a total of five surfaces, the top surface and four sides. ATC102 has a tool change arm 103 that can handle both vertical and horizontal spindles. It is common to have However, recently, angular attacks other than 90° such as 30° and 45° are being used in mold processing, etc. Increasingly, attachments are being used for attachment spindles other than 90°. At present, tool changes cannot be performed using the conventional ATC102 and must be done manually. be.

0003

[Problem that the idea aims to solve]

Manually handle angular attachments other than 90° as described in conventional technology. The method of changing tools has had the problem of being an obstacle to automation. The present invention was devised in view of these problems of the conventional technology, The purpose of this is to add angular attachments to automatic attachment changing devices. Angular attachment other than 90° with conventional ATC by adding a tool change function for For automatic attachment change equipment that can change tools for the attachment spindle. The aim is to provide a tool exchange function.

0004

[Means to solve the problem]

In order to achieve the above purpose, the angular attachment tool in this invention The exchange mechanism moves the attachment stand of the automatic attachment exchange device to the exchange position and the waiting position. An angular attachment mechanism other than 90° on the stand that can be horizontally moved to the machine position. The main shaft center of the main shaft of the main shaft is provided so as to be rotatable and indexable so that it faces in the same direction as the horizontal main shaft, and It is equipped with a means for horizontally moving the attachment stand and a turning index means, and is interchangeable. Angular attachment at angles other than 90° on the attachment stand in the changing position This system performs automatic tool change of the parts.

[0005]

[Effect]

Adjust the attachment stand of the automatic attachment exchange device to the exchange position as needed. angular attachment other than 90° on the attachment stand. Rotate the attachment stand so that the main axis faces the same direction as the horizontal main axis, and , the tool change arm unit is compatible with the horizontal spindle to automatically change the attachment spindle. Replace tools.

[0006]

【Example】

Examples will be described with reference to FIGS. 1 to 4. In the portal machining center shown in Figure 4, the X-axis direction on the bed 1 installed on the floor A table 2 is placed so that it can be moved and positioned along the direction guide, and is placed on both sides of the bed 1. A crossbeam 5 is fixed on columns 3A and 3B erected on the floor. The crossbeam 5 has a guide in the Y-axis direction, and the spindle head 6 can be moved and positioned on this guide. It is on a shelf.

[0007] A tool magazine device 7 is installed on the floor on the left side of the column 3A. The device 7 has a magazine pot 8 that stores a plurality of tools facing left in the Y-axis direction. It is connected endlessly with a hook-shaped chain so that it can be rotated and indexed to the front tool change position. It has become.

[0008] The sub-arm 9 is attached to the magazine frame near the tool exchange position, and the sub-arm 9 rotates the rotation axis in the Y-axis direction. 90° rotation and insertion/removal in the direction of the rotation axis and in the W-axis direction parallel to the X-axis or Z-axis It is set up so that it can be moved.

[0009] A guide base 11 having a guide 11a in the Y-axis direction is fixed to the left side of the lower surface of the crossbeam 5. The ready station pot 12 is located at the bottom of the left side of the guide base 11. It is provided so that it can be turned by 90 degrees to the left in the axial direction and downward in the W-axis direction, and a key is mounted on the guide 11a. A carrier 13 is provided movably by a hydraulic cylinder 10.

0010 The tool exchange arm unit 14 is mounted on the carrier 13 at 90° in the Y-axis vertical plane. ° It is supported so that it can be rotated and indexed, and the tool exchange arm unit 14 has an exchange arm. 15 is provided so that it can be rotated by 180 degrees and can be inserted and removed in the direction of the rotation axis.

[0011] On the other hand, a spindle ram 16 is supported by the spindle head 6 so as to be movable and positionable in the Z-axis direction. The main shaft 17 of the machine is rotatably supported on the main shaft ram 16. Main shaft ram 16 A 30° angular attachment 18 is removable and horizontal as required at the tip of the It is mounted so that it can be rotated and indexed within the plane, and has a 30° angular attachment. An attachment main shaft 19 is rotatably supported by the attachment main shaft 18. 19 is adapted to be rotated by the main shaft 17 of the machine.

0012 The base 22 of the automatic attachment changer 21 is placed on the floor in front of the column 3A. The pillars 23A and 23B, which are installed parallel to the base 22 and are integral with the base 22, are The guide 24A is fixed, and the rail 24B that forms a pair with the guide 24A is attached to the arm 25. The arm 25 is fixed and is movable in the X-axis direction.

[0013] A rotation center shaft 27 is rotated to face the Y-axis direction on a bearing bracket 26 fixed to the end of the arm. It is rotatably supported, and a U-shaped attachment is attached to the tip of this pivot shaft 27. The right end surface of the stand 28 is fixed. Then, a fixed pin is attached to the rear end of the rotation center shaft 27. The nion 29 is attached to the piston of the hydraulic cylinder 31 for rotating the stand fixed to the tip of the arm 25. It meshes with a rack carved on the ton rod 32 and is supplied to the cylinder 31. By switching the pressure fluid, the stand 28 can be moved between the horizontal position and the 30° angle attachment. and a corresponding 60° tilt position.

[0014] Further, a hydraulic cylinder 33 for arm movement is fixed to the arm 25 in parallel. , the tip of the piston rod 30 is fixed to the column 23A via a bracket, and the cylinder By switching the pressure fluid supplied to the cylinder 33, the attachment stand 28 is moved to the replacement position. It is adapted to be horizontally moved in the X-axis direction to a standby position.

[0015] The automatic attachment exchange device 21 has a main axis in the X-axis direction as shown by the virtual line in FIG. A cover 35 having an opening/closing door 34 is attached to the machine side, and the door 34 is attached to the pillar 23. It is automatically opened and closed upward by a fluid pressure cylinder 36 fixed to the side of A. ing.

[0016] Furthermore, the tip of the main shaft ram 16 and the mounting part of the 30° angular attachment 18 is equipped with an automatic attachment/detachment device (not shown) similar to Utility Model Publication No. 63-9390. It is attached. This is fixed to the main shaft side concentrically with the lower end surface of the main shaft ram 16, and has curvic teeth on the lower surface. A positioning coupling member having a wheel-shaped portion and a clamp that is fitted concentrically to the outer circumference of the lower end of the main shaft ram. At times, it is pushed upward by pressure fluid, and when unclamped, it is pushed upward by pressure fluid and its own weight. A clamp ring that can slide downward only in the axial direction and has an outer circumferential jaw; A spring that constantly biases the clamp ring to pull up, and a spring that biases the outside of the clamp ring. The male sprocket is received by the jaw part and slid together, and is rotatably fitted and has a male sprocket on the outside. Attachment that has a line-shaped thin mountain part and internal teeth on the inside. The removable ring engages with the internal teeth of this attachment removable ring and rotates a predetermined amount. A swing drive mechanism is provided,

[0017] On the attachment side, there is a drive shaft member that is fitted onto the main shaft and rotates integrally with the main shaft, and a The moving shaft member is supported in the center so that it can move and rotate by a certain amount in the axial direction, and the A positioning coupling member that meshes with the curvic gear-like part of the positioning coupling member is provided concentrically. When the drive shaft is fitted to the main shaft, the male spline-shaped crest of the detachable ring A main body member having a male spline-like thin ridge portion passing between the parts. It was established.

[0018] Furthermore, an attachment tool loosening device 37 is fixed to the front of the column 3A. , this attachment loosening device 37 is operated by a fluid pressure cylinder 38 in the Y-axis direction. A female spigot part 41 that is movable along two guide bars 39 can be moved as needed. Engages with the male pilot part 18a at the rear end of the 30° angular attachment 18, and A hydraulic cylinder for loosening a tool (not shown) provided in the spigot part 41 is used to loosen the tool. The tool tension rod in the attachment spindle 19 is pushed out against the force of the spring to tighten the tool. It is designed to cancel the pump.

[0019] Next, the operation of this embodiment will be explained. When an attachment replacement command is issued from the NC, the spindle head 6 moves toward the magazine in the Y-axis direction. It is moved to the attachment exchange position (tool exchange position), and the fluid pressure series is Pressure fluid is supplied to the front chamber of the holder 33, and the holder 33 is placed on the attachment stand 28. The 30° angular attachment 18, which is waiting with the drive shaft vertical, is It moves forward toward the main machine and is positioned at the replacement position, and the attachment is attached to the main shaft 17. The 18 drive shafts are concentric.

[0020] Next, when a tool change command for the attachment spindle is issued from the NC, the fluid pressure series Pressure fluid is supplied to the lower chamber of the cylinder 31, and the rotation center shaft 27 and the attachment holder are The stand 28 is rotated 60 degrees, the attachment main shaft 19 faces forward in the X-axis direction, and the The female fitting part of the attachment tool loosening device 37 is set to Y by the pressure cylinder 38. Moves toward the attachment in the axial direction and engages with the male pilot part at the rear end of the attachment. do.

[0021] Next, the next tool T is gripped by one gripping claw of the exchange arm 15, and the tool is exchanged while waiting. The arm unit 14 is rotated 90 degrees so that the next tool T faces forward in the X-axis direction, and the key After the carrier 13 moves to the side opposite to the magazine in the Y-axis direction, the exchange arm 15 moves toward the rotation axis. The next tool T to be gripped by extending in the direction and turning 180 degrees is concentric with the attachment main shaft. Then, the exchange arm 15 contracts again in the direction of the rotation axis and attaches to the attachment main shaft 19 for the next machining. Tool T is inserted and the clamp is released by the attachment tool loosening device. The tool tension rod (not shown) that was being held is pulled in by the force of the spring, and the next tool T is attached to it. After the tool is clamped to the main shaft 19, the attachment tool loosening device 37 releases fluid pressure. The cylinder 38 returns to the atmospheric position on the magazine side in the Y-axis direction.

[0022] Next, the carrier 13 moves toward the magazine in the Y-axis direction, and the exchange arm 15 moves to the next tool. Pressure fluid is supplied to the upper chamber of the fluid pressure cylinder 31 and the attachment is separated from T. The stand 28 and the 30° angular attachment 18 are rotated 60° in the opposite direction and attached. The attachment drive shaft returns to vertical.

[0023] Next, the main shaft ram 16 moves downward in the Z-axis direction, and the tapered shank portion at the tip of the drive shaft is inserted into the spindle hole, and then the attachment is angled at 30° by the automatic attachment/detachment device. The attachment 18 is attached to the main shaft ram 16, and the main shaft ram 16 is placed on the upper side in the Z-axis direction. When the attachment 38 moves slightly, the attachment 38 separates from the pin 28a on the stand 28. Then, pressure fluid is supplied to the front chamber of the fluid pressure cylinder 33, and the arm 25 retreats, causing the air to become empty. The attachment stand 28 now returns to the standby position.

[0024] Next, the spindle head 6 is moved to the side opposite to the magazine in the Y-axis direction and begins cutting. During machining, the next tool command is issued from the NC and the designated machining tool is stored in the magazine device 7. After the tool is fitted into the ready station pot 12 by the sub-arm 9, it is replaced. It is gripped by one gripping claw of the arm 15 and waits until the next tool change command is issued from the NC. Machine.

[0025] After completing one section of the cutting process using the attachment spindle mounting tool T, the spindle head 6 moves to the magazine side in the Y-axis direction and is positioned at the tool exchange position, and the attachment The stand 28 moves forward to the replacement position, and the main shaft ram 16 moves downward in the Z-axis direction to rotate 30 degrees. The angular attachment 18 is placed on the stand 28, and the attachment automatically The attachment/detachment device releases the attachment 18 from the main shaft ram 16, and The shaft ram 16 moves upward in the Z-axis direction and once leaves the attachment 18.

[0026] Next, the attachment stand 28 and the 30° angular attachment 18 are placed 6 It is rotated by 0°, and the female fitting part 41 of the attachment tool loosening device 37 is attached. is engaged with the male pilot part 18a of the tool change arm unit 1. 4 is rotated by 90 degrees so that the exchange arm rotation axis faces the X-axis direction.

[0027] Next, as described above, the carrier 13 moves to the side opposite to the magazine in the Y-axis direction, and the replacement Use the other empty gripping claw of the arm 15 to hold the used tool T that is fitted onto the attachment main shaft. grip, and the attachment tool is loosened by the fluid pressure cylinder of the attachment tool loosening device 37. The tool pull rod in the main shaft 19 is pushed out to release the clamp and release the exchange arm. 15 extends in the direction of the rotation axis and extracts the used tool T from the attachment main shaft 19. .

[0028] Next, the exchange arm 15 is rotated 180 degrees to locate and insert the next tool and the used tool. The next tool T is then retracted in the direction of the rotation axis and is inserted into the attachment spindle. After the ramp is completed, the attachment tool loosening device 37 is activated by the hydraulic cylinder 38. It returns to the standby position on the magazine side in the Y-axis direction. Next, the carrier 13 rotates in the Y-axis direction. The exchange arm 15 moves to the next tool side and separates from the next tool.

[0029] Next, the 30° angular attachment 18 is moved to the main shaft ram 1 in the same manner as described above. The used tool T, which is attached to the tool 6 and begins cutting, is held by the exchange arm 15. It is returned to the magazine pot 8 by the sub arm 9 via the day station pot 12. Rejected.

[0030]

[Effect of the idea]

Since the present invention is configured as described above, it produces the following effects. Move the attachment stand of the automatic attachment exchange device horizontally to the exchange position. If the angular attachment on the stand is at an angle other than 90°, It rotates so that it faces the same direction as the horizontal spindle, and automatically changes tools using ATC. As a result, ATC compatible with both vertical and horizontal spindles can be used as is, and automatic attachment mechanisms are available. Both automatic tool change functions for angular attachments other than 90° can be achieved with an extremely simple mechanism.

[Brief explanation of drawings]

FIG. 1 is a side view of an automatic attachment changing device with a tool changing mechanism for angular attachments and parts related to the device according to the present embodiment.

FIG. 2 is a front view of FIG. 1 seen from a 90° different direction.

FIG. 3 is a perspective view for explaining the operation of this embodiment.

FIG. 4 is a front view of a vertical machining center equipped with an automatic attachment with a tool change mechanism for angular attachment according to the present embodiment.

FIG. 5 is a front view of a conventional vertical machining center.

[Explanation of symbols]

6 Spindle head 13 Career 14 Tool exchange arm unit 15 Exchange arm 16 Main shaft ram 18 30° angular attachment 19 Attachment spindle 21 Automatic attachment exchange device 23 Fluid pressure cylinder for arm movement 25 Arm 27 Rotation center axis 28 Attachment stand 31 Fluid pressure cylinder for rotating stand

Claims (1)

[Scope of utility model registration request] 1. A machine tool comprising a tool changing arm unit for both vertical and horizontal spindles and an automatic attachment changing device, wherein an attachment stand of the automatic attachment changing device is horizontally movable between an changing position and a standby position, and The angular attachment on the table is provided so as to be pivotable and indexable so that its spindle axis other than 90° points in the same direction as the horizontal spindle, and means for horizontally moving the attachment stand and pivoting and indexing means are provided. A tool exchange mechanism for an angular attachment, characterized in that the tool is automatically exchanged for an angular attachment at angles other than 90° on an attachment stand at an exchange position.