JPH0516025U - Multi-axis head changer for machine tools - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a multi-axis head changer for a machine tool, which can shorten setup time and reduce equipment cost. In the multi-axis head changing device for a machine tool according to the present invention, multi-axis heads 7 and 8 for replacement are arranged on a machine body 2 and a carriage 6, and a drive head 9 of a spindle unit 4 is arranged.
A movable positioning pin 18 is provided on the multi-axis head 5,
7 and 8 are provided with pin holes 20 for positioning pins 18 and movable guide rods 23 to which jig replacement parts 22 are attached, and further drive head 9 and multi-axis head 5,
The head clamp 32 is arranged on the coupling surface of 7, 8
A multi-axis head 5 of the drive head 9 and a multi-axis head 7 for replacement,
8 is replaced, the positioning pin 18 and the head clamp 32 are actuated, and the multi-axis heads 5, 7, 8 are moved in a direction orthogonal to the axial direction of the spindle unit 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-axis head changing device for a machine tool.

[0002]

[Prior Art]

 Conventionally, in machine tools that continuously perform multiple types of drilling on a work piece, various multi-axis heads (drill heads) can be selectively selected and attached to or removed from the spindle unit. It is designed to be exchangeable. However, multi-axis heads and jig plates, which are jig replacement parts, are individually attached to the spindle unit and jigs, and the transportation work of multi-axis heads is performed using chain blocks and forklifts.

[0003]

[Problems to be solved by the device]

 However, as described above, the method of individually mounting the multi-axis head or jig plate on the spindle unit or jig makes positioning the spindle unit and the multi-axis head difficult, and the setup work is troublesome. It has a drawback that it takes a long time and the multi-axis head cannot be replaced promptly. Moreover, since a chain block and a forklift are required, the equipment cost is high and it is economically disadvantageous.

The present invention has been made in view of the above circumstances, and an object thereof is to reduce the setup time and to reduce the equipment cost by eliminating the transportation means of the multi-axis head. It is to provide a head exchange device.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems of the prior art, in the present invention, a multi-axis machine tool is provided in which a plurality of types of multi-axis heads are selectively selected and attached to and detached from an axially movable spindle unit. In the spindle head changer, a replacement multi-spindle head with jig replacement parts attached is arranged on the machine body and on the carriage in association with the spindle unit, while positioning pins are attached to the spindle unit. It is provided so as to be movable along the axial direction, and the multi-axis head is provided with a pin hole for engaging with the positioning pin, and a guide rod for mounting the jig replacement part is provided so as to be movable along the axial direction. When a head clamp is arranged on the connecting surface of the spindle unit and the multi-axis head, and the multi-axis head of the spindle unit is replaced with the replacement multi-axis head on the machine body or the carriage. It actuates the positioning pins and the head clamp of the spindle unit, constituting the multi-axis head to move in the direction you perpendicular to the axial direction of the spindle unit.

[0006]

[Work]

 With the multi-axis head changing device for a machine tool according to the present invention, when the multi-axis head mounted on the main spindle unit and the multi-axis head for replacement arranged on the machine body or on the carrier are exchanged, positioning of the main spindle unit is performed. Since the pin and head clamp are activated, and the multi-axis head is moved in the direction orthogonal to the axial direction of the spindle unit, the multi-axis head can be attached / detached quickly and easily without using a chain block or forklift. It becomes possible.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

1 to 5 show an embodiment of the present invention, in which 1 is a multi-axis head exchange type machine tool for simultaneously performing a plurality of types of multi-axis drilling on a workpiece W. This machine tool 1 is fixed to a feed unit 3 on a machine body 2, and a spindle unit 4 is provided movably in the axial direction on the machine body 2 by the feed unit 3, and the spindle unit 4. 4, a first multi-axis head 5 that is detachably mounted, and second and third multi-axis heads 7 for replacement, which are arranged on the machine body 2 and the carriage 6 in association with the spindle unit 4, 8 and each of these multi-axis heads 5, 7, and 8 have substantially the same structure, and are configured to be selectively selected and replaced according to the workpiece W.

The spindle unit 4 comprises a drive head 9 and a drive motor 10, and the drive head 9 is formed with a table 11 on which the multi-axis heads 5, 7, 8 are placed. A drive shaft (spindle) 12 is rotatably disposed in the drive head 9 by a drive motor 10 connected via a transmission mechanism 13. A drive clutch 14 is provided on the front end side of the drive shaft 12, and the drive clutch 14 is continued via a clutch arm 16 which is rotationally driven by a rotating operation of a clutch lever 15, whereby a multi-axis mechanism is provided. A driven shaft (not shown) in the head 5 is detachably connected to the drive shaft 12. In FIG. 3, 17 is an arm lock pin.

A positioning pin 18 for positioning the multi-axis head 5 is provided inside the drive head 9 along the axial direction (moving direction) of the main spindle unit 4, and the tip of the positioning pin 18 is provided. Is mounted so as to project from the joint surface 9a with the multi-axis head 5. Therefore, a hydraulic cylinder 19 is arranged at the base end of the positioning pin 18, and the positioning pin 18 is provided so as to be movable in the axial direction by operating the hydraulic cylinder 19.

On the other hand, a pin hole 20 that engages with the positioning pin 18 is provided on the coupling surface 5a side of the first multi-axis head 5 with the drive head 9, and the pin hole 20 is positioned. The pin 18 is formed in such a size that the tip of the pin 18 can be inserted. On the front surface 5b side of the first multi-axis head 5, a multi-axis drill 21 for performing predetermined drilling at a plurality of positions on the workpiece W is rotatably attached. It is configured to rotate by a driven shaft (not shown). The driven shaft is connected to the drive shaft 12 via the drive clutch 14 and is rotationally driven by the drive shaft 12.

A guide rod 23 for mounting a jig plate 22, which is a jig replacement component, is provided on the upper and lower parts of the multi-axis head 5 so as to be movable along the axial direction. The guide rod 23 can be pulled out from the front surface 5b of the first multi-axis head 5 at the time of mounting. A small diameter portion 25 having a screw hole 24 is formed at the front end of the guide rod 23. The small diameter portion 25 is fitted into the pilot hole 26 of the jig plate 22 and the bolt 27 is inserted through the washer 28. The jig plate 22 is tightened and fixed to the guide rod 23 by being screwed into the screw hole 24. A peripheral groove 30 that engages with the stopper pin 29 is formed at the rear end of the guide rod 23, and the stopper pin 29 is always attached in the radial direction of the guide rod 23 by the elastic force of the spring 31. It is energized.

Further, on the coupling surface 9a of the drive head 9 and the coupling surface 5a of the first multi-axis head 5 which form the main spindle unit 4, head clamps 32 for coupling both heads 9 and 5 are arranged vertically and horizontally. The head clamp 32 is provided at four positions, and includes a clamp hook 33 provided on the drive head 9 side and a clamp plate 34 provided on the first multi-axis head 5 side. The clamp hook 33 is provided along the moving direction of the main spindle unit 4, and its tip is arranged so as to project from the coupling surface 9a with the first multiaxial head 5 in a state where the first multiaxial head 5 is mounted. Has been done. Therefore, a hydraulic cylinder 35 is provided at the base end of the clamp hook 33, and the clamp hook 33 is provided so as to be movable along the axial direction by operating the hydraulic cylinder 35. A concave portion 36 having a U-shaped cross section is provided on the outer peripheral surface of the tip end of the clamp hook 33, and the concave portion 36 is formed in a size capable of engaging with the clamp plate 34.

A concave groove 37 is provided in the coupling surface 5 a of the first multi-axis head 5 along the direction orthogonal to the moving direction of the spindle unit 4, corresponding to the clamp hook 33. The tip of the clamp hook 33 is housed. Then, the clamp plate 34 is fixed along the groove 37, and a part of the clamp plate 34 is arranged in the radial direction so as to protrude into the groove 37. The outer surface of the clamp plate 34 is arranged so as to be flush with the coupling surface 5a of the first multiaxial head 5.

On the other hand, on the machine body 2 located in front of the spindle unit 4 and the first multi-axis head 5, a jig body 38 having a jig plate mounting surface 38a and a work mounting surface 38b is erected. The jig plate 22 and the workpiece W are fixed to the jig body 38 by using a clamp device (not shown) or the like. Further, further on the front side of the jig main body 38, a conveyor 39 that conveys the workpiece W to the jig main body 38 is provided.

Further, on the machine body 2, a conveying unit 40 and a guide rail 41 are arranged on both left and right sides with the feeding unit 3 interposed therebetween, and the conveying unit 40 and the guide rail 41 are arranged on the main shaft unit 4. It is provided along the direction orthogonal to the axial direction. Further, the transport means 42 is also provided on the transport carriage 6 in the same manner as the transport means 40 on the machine body 2, and the height of the transport carriage 6 is formed to be the same as that of the machine body 2.

On the lower surface of the multi-axis head 5, 7, 8, guide grooves 43, 44, 45 engaging with the guide rail 41 are formed along the direction orthogonal to the axial direction. The multi-axis heads 5, 7, 8 are configured to move on the transporting means 40 while being guided by the guide rails 41 by the guide grooves 43, 44, 45. In the figure, 46 is a first stopper member that blocks the movement of the first and third multi-axis heads 5 and 8, and 47 is a second stopper member that blocks the movement of the second multi-axis head 7.

The frequently used first and second multi-axis heads 5, 7 are installed on the machine body 2 so that they can be attached to and detached from the drive head 9 only by a shift operation, and the less frequently used third multi-axis head The head 8 is installed on the carriage 6 and is attached and detached including the work of placing it from the carriage 6 and lowering it from the machine body 2. The second and third multi-axis heads 7 and 8 for replacement are arranged with the jig plate 22 set, and when not in use, the jig plate 22 is attached to the guide rod 23 with the bolt 27. It is fixed by tightening. Further, the first and second multi-axis heads 5 and 7 on the machine body 2 are fixed by head detent pins 48 so as not to fall from the machine body 2.

A plurality of support bases 50 having free bearings 49 are arranged on the upper surface of the table 11 of the drive head 9, and the support bases 50 allow the multi-axis heads 5, 7, 8 to move to the table. It is configured so that it can move smoothly over the upper part 11. On the other hand, a pair of grips 51, 52, 53 used when moving the multi-axis heads 5, 7, 8 are attached to one side surface of the multi-axis heads 5, 7, 8 with front and rear spaces respectively. Has been.

When the first multi-axis head 5 and the third multi-axis head 8 are exchanged for drilling a different type of workpiece W, first, the two guide rods 23 are connected to the first multi-axis head. 5 is fully pulled out from the front surface 5b, and the feed unit 3 is operated to advance both the first multi-axis head 5 and the drive head 9. Then, the small diameter portion 25 of the guide rod 23 is fitted into the pilot hole 26 of the jig plate 22, so that the guide rod 23 and the jig plate 22 are connected to each other. If the first multi-axis head 5 is fed too much, the guide rod 23 contracts by that amount.

Next, a clamp device (not shown) that fixes the jig plate 22 is operated to release the clamp on the jig plate 22. Then, when the feed unit 3 is operated again and both the first multi-axis head 5 and the drive head 9 are retracted, the jig plate 22 is also attached, so that the bolt 27 is screwed into the screw hole 24. The jig plate 22 is tightened and fixed to the guide rod 23, and the guide rod 23 is pushed into the first multi-axial head 5 to be contracted and engaged with the stopper pin 29 to be fixed. This work can be done anytime thereafter.

Then, the clutch lever 15 is manually rotated to move the drive shaft 12 backward and disengage the drive clutch 14. Further, the hydraulic cylinder 19 is operated to retract the positioning pin 18, and the hydraulic cylinder 35 is operated to advance the clamp hook 33 to release the clamp between the first multi-axis head 5 and the drive head 9 by the head clamp 32. To do. Then, the first multi-axis head 5 which is set to the position A in FIG. It is placed on the installed empty carrier vehicle 6 through the carrier means 42. Then, the first multi-axis head 5 is fixed to the carriage 6 by a head detent pin (not shown), and the worker carries the carriage 6 to the storage location.

Next, the carriage 6 on which the third multi-axis head 8 is mounted is carried to the position C and installed. Then, the head detent pin (not shown) is removed, and the third multi-axis head 8 is moved to the table 11 of the drive head 9 at the A position by the operation reverse to the above procedure, and the tip of the clamp hook 33 is placed in the groove 37. The clamp hook 33 and the clamp plate 34 are engaged with each other via the recess 36, and the clamp hook 33 and the clamp plate 34 are brought into close contact with the coupling surface 9a of the drive head 9. In this state, the positioning pin 18 is moved forward by the hydraulic cylinder 19 and inserted into the pin hole 20 to position the third multi-axis head 8, and the clamp hook 33 is moved backward by the hydraulic cylinder 35 to move the head clamp. The third multi-axis head 8 is mounted on the drive head 9 by the clamping action of 32. Then, the drive shaft 12 is moved forward by the clutch lever 15, and the drive clutch 14 is engaged and connected to the driven shaft (not shown).

Subsequently, the guide rod 23 is fully pulled out, and the bolt 27 is removed from the jig plate 22 and the guide rod 23. In this state, the third multi-axis head 8 is moved forward by the feed unit 3 to align the jig plate 22 with the mounting surface 38a of the jig body 38, and the jig plate 22 is attached to the clamp device (not shown). And fix it to the jig body 38. After that, when the feed unit 3 is retracted, only the third multi-axis head 8 is retracted, the head replacement work is completed, the machine tool 1 can be used, and the multi-axis drill 21 is used to punch the workpiece W. Ready to go.

Also, when the first multi-axis head 5 and the second multi-axis head 7 are replaced, the same operation as the above procedure is performed. However, in this head replacement, the first multi-axial head 5 at the A position is moved to the B position on the machine body 2, and the second multi-axial head 7 at the D position is moved to the A position.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention. It

For example, in the above-described embodiment, the head clamp 32 is composed of the clamp hook 33 and the clamp plate 34. However, if the multi-axis heads 5, 7, 8 can be clamped to the drive head 9 quickly and reliably, , Other structures may be used.

[0028]

[Effect of the device]

 As described above, the multi-axis head exchanging device for machine tools according to the present invention has the multi-axis head for exchanging arranged on the machine body and the carriage, and is provided with movable positioning pins on the spindle unit. The multi-axis head has pin holes for positioning pins, a movable guide rod for mounting jig replacement parts, and a head clamp on the connecting surface of the spindle unit and the multi-axis head. When replacing the multi-spindle head of the unit with the replacement multi-spindle head on the machine body or on the carriage, the positioning pin and head clamp of the main spindle unit are actuated, and the multi-spindle head is moved to the main spindle unit. Since it is configured to move in a direction orthogonal to the axial direction of the, the setup work is simplified and the multi-axis head can be easily and reliably replaced according to the workpiece. , Thereby improving the work efficiency by shortening the setup time.

Further, in the multi-axis head exchanging device of the present invention, a chain block, forklift, etc. are not required for transporting the multi-axis head, and since these transporting means can be eliminated, the facility cost can be significantly reduced. , Economically advantageous. Moreover, since a multi-axis head for replacement is installed on the carrier with the jig replacement parts attached, it is possible to store these parts all at once, reducing the storage space and replacing the head. You can prevent mistakes.

[Brief description of drawings]

FIG. 1 is a side view showing a multi-axis head changer for a machine tool according to an embodiment of the present invention.

FIG. 2 is a plan view showing a multi-axis head changing device of the machine tool.

FIG. 3 is a cross-sectional view showing a drive head that constitutes a spindle unit of the machine tool.

FIG. 4 is a side view showing the multi-axis head described in the above work.

FIG. 5 is a cross-sectional view showing a multi-axis head of the machine tool.

[Explanation of symbols]

 1 Machine tool 2 Machine body 3 Feed unit 4 Spindle unit 5, 7, 8 Multi-axis head 6 Carrying truck 9 Drive head 11 Table 18 Positioning pin 19 Hydraulic cylinder 20 Pin hole 22 Jig plate 23 Guide rod 24 Screw hole 25 Small diameter part 26 Pilot Hole 27 Bolt 32 Head Clamp 33 Clamp Hook 34 Clamp Plate 35 Hydraulic Cylinder 36 Recessed 37 Recessed Groove 38 Jig Main Body 40,42 Conveying Means 41 Guide Rails 43, 44, 45 Guide Groove 49 Bearing 50 Support 51, 52, 53 handle

Claims (2)

[Scope of utility model registration request] 1. A multi-axis head replacement device for a machine tool, wherein a plurality of types of multi-axis heads are selectively selected and attached to and detached from a spindle unit that is movable in the axial direction. A replacement multi-axis head with jig replacement parts is placed on the machine body and on the carriage, while a positioning pin is provided on the spindle unit so as to be movable in the axial direction. A pin hole that engages with the positioning pin is provided, a guide rod for mounting the jig replacement part is provided so as to be movable in the axial direction, and a head clamp is provided on the coupling surface between the spindle unit and the multi-axis head. When replacing the multi-axis head of the spindle unit and the replacement multi-axis head on the machine body or on the carriage, the positioning pin of the spindle unit and the head clamp And a multi-axis head exchange device for a machine tool, wherein the multi-axis head is moved in a direction orthogonal to the axial direction of the spindle unit. 2. A jig replacement part is attached to a guide rod of a multi-axis head mounted on the main spindle unit, and the multi-axis head of the main spindle unit and the machine main body or the carrier are mounted with the jig replacement part attached. The multi-axis head exchanging device for a machine tool according to claim 1, wherein the multi-axis head for exchanging on the dolly is exchanged.