Multi-spindle machining machine with tool changing mechanism

1. Field of the Invention

The present invention relates to an automatic machining machine, and more particularly to a multi-spindle machining machine with a tool changing mechanism which can lower size and production cost and enhance tool changing efficiency.

2. Description of the Prior Art

Conventional tool changing mechanism of a machining machine is disposed within a moving range of a carrier of a base and outside a working range of a working head, and a tool deposit is driven by another set of driving device, thus increasing size, production cost, and tool changing time.

Besides, a height of another conventional machining machine is high to increase the length and the width thereof, thereof also increasing size, production cost, and tool changing time.

The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.

The primary object of the present invention is to provide a multi-spindle machining machine with a tool changing mechanism which can lower size and production cost and enhance tool changing efficiency.

A multi-spindle machining machine with a tool changing mechanism in accordance with a preferred embodiment of the present invention comprises:

a base;

a carrier including a seat, a rotary shaft, and a fixing holder, the seat allowing to move in Z axis, the rotary shaft being fixed on the seat laterally and driving the seat to rotate in A axis, the fixing holder being coupled to an end portion of the rotary shaft to fix a workpiece thereon;

a tool changing mechanism including a mount and a monitor, the mount being mounted to the rotary shaft so as to rotate with the rotary shaft, and including a plurality of slots to receive the tools respectively, the monitor being fixed on the seat to measure a length of the tool clamped on the driving spindle;

a working head moving above the carrier and the tool changing mechanism in X and Y axes and including a driving spindle mounted on a lower end thereof to rotate axially, and the lower end of the driving spindle allowing to engage and disengage the tool of the tool changing mechanism.

FIG. 1 is a perspective view showing the assembly of a multi-spindle machining machine with a tool changing mechanism in accordance with a first embodiment of the present invention;

FIG. 2 is a partial amplified view of the multi-spindle machining machine with the tool changing mechanism in accordance with the first embodiment of the present invention;

FIG. 3 is an amplified view of a tool changing mechanism of the multi-spindle machining machine in accordance with the first embodiment of the present invention;

FIG. 4 is a cross sectional view of the tool changing mechanism of the multi-spindle machining machine in accordance with the first embodiment of the present invention;

FIG. 5 is a cross sectional view showing the operation of the tool changing mechanism of the multi-spindle machining machine in accordance with the first embodiment of the present invention;

FIG. 6 is a cross sectional view showing a mount of the tool changing mechanism of the multi-spindle machining machine in accordance with a second embodiment of the present invention;

FIG. 7 is another cross sectional view showing the mount of the tool changing mechanism of the multi-spindle machining machine in accordance with a third embodiment of the present invention;

FIG. 8 is a cross sectional view showing the operation of a dust collecting mechanism of the tool changing mechanism of the multi-spindle machining machine in accordance with the first embodiment of the present invention;

FIG. 9 is another cross sectional view showing the operation of the dust collecting mechanism of the tool changing mechanism of the multi-spindle machining machine in accordance with the first embodiment of the present invention.

The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.

Referring to FIG. 1 , a multi-spindle machining machine with a tool changing mechanism in accordance with a preferred embodiment of the present invention comprises a base 1 , a carrier 2 , a tool changing mechanism 3 , a working head 4 , a lateral driving device 5 , and a vertical driving device 6 , wherein

the base 1 includes a chamber 12 to move the carrier 2 and the working head 4 so as to have a working process therein. The cavity 12 includes a transparent cover 13 disposed on one side thereof to be turned, to monitor the working process and to be opened to install the workpiece 10 onto the carrier 2 or to remove the workpiece 10 from the carrier 2 .

The carrier 2 is provided to move the workpiece 10 in the chamber 12 to move in Z axis.

The tool changing mechanism 3 is assembled to the carrier 2 to receive a plurality of tools 11 and to move vertically with the carrier 2 . The tool 11 is a milling cutter, a drill, and a grinding cutter, etc.

The working head 4 moves above the carrier 2 and the tool changing mechanism 3 in X and Y axes and includes a driving spindle 40 mounted on a lower end thereof to rotate axially, and the lower end of the driving spindle 40 allows to engage and disengage the tool 11 of the tool changing mechanism 3 . The driving spindle 40 allows to clamp the tool 11 to have a cutting, drilling, and grinding process.

The lateral driving device 5 is located on a back side of the chamber 12 to drive the working head 4 to move laterally.

The vertical driving device 6 is located on a left side of the chamber 12 to drive the carrier 2 to move vertically.

Referring to FIG. 2 , the carrier 2 includes a seat 20 , a rotary shaft 21 , and a fixing holder 22 . The seat 20 allows to move in Z axis, the rotary shaft 21 is fixed on the seat 20 laterally and drives the seat 20 to rotate in A axis by using an air cylinder, and a servo motor. The fixing holder 22 includes a lateral shank 23 and two positioning rods 24 , the lateral shank 23 is coupled to the rotary shaft 21 , and the two positioning rods 24 extend vertically from two ends of the lateral shank 23 to fix the workpiece 10 thereon so that two upper and lower opposite sides expose between the two positioning rods 24 . The fixing holder 22 is designed to have different structures based on different shapes of workpiece 10 . For example, the fixing holder 22 is formed in a square shape to match with a circular fixing holder to clamp the workpiece 10 , and the fixing holder 22 is formed to match with a cylindrical workpiece to clamp or insert a paw or sleeve.

The working head 4 includes at least one nozzle 41 to spray cutting oil or air.

The lateral driving device 5 includes a first guiding member 50 , a second guiding member 51 , a work pedestal 52 , a first driver 53 , and a second driver 54 . The first guiding member 50 is mounted on the base 1 , the second guiding member 51 is fixed on the first guiding member 50 to move along the X axis. The work pedestal 52 is secured to the second guiding member 51 to move along the Y axis, the first diver 53 is a servo motor and is disposed on the first guiding member 50 to drive the second guiding member 51 to move. The second driver 54 is a serve motor and is fixed on the second guiding member 51 to drive the work pedestal 52 to move. The working head 4 is connected to the work pedestal 52 .

The vertical driving device 6 includes a third guiding member 60 and a third driving driver 61 . The third guiding member 60 is disposed on the base 1 , the seat 20 of the carrier 2 is fixed on the third guiding member 60 to move along the Z axis. The third driver 61 is secured on the third guiding member 60 to drive the seat 20 to move.

As shown in FIGS. 3 and 4 , the tool changing mechanism 3 includes a case 30 , a housing 31 , a driving member 32 , a mount 33 , and a monitor 34 , wherein

the case 30 is assembled to the seat 20 to be inserted by the rotary shaft 21 , and includes an opening formed on an upper end thereof.

The housing 31 is assembled to the case 30 to open or close the opening of the case 30 .

The driver 32 is disposed in the case 3 to drive the housing 31 to be open or close the opening of the case 30 .

The mount 33 is mounted to the rotary shaft 21 and located at the case 30 to rotate with the rotary shaft 21 , and includes a plurality of slots 35 to receive the tools 11 respectively.

The monitor 34 is fixed on the seat 20 and located at the case 30 to measure a length of the tool 11 clamped on the driving spindle 40 .

As illustrated in FIGS. 3-5 , when changing the tools 11 , the driving member 32 drives the housing 31 to open the opening of the case 30 , and the working head 4 moves above the case 30 laterally. Thereafter, the seat 20 of the carrier 2 moves upward to insert the tool 11 of the driving spindle 40 to an empty slot 35 , and the driving spindle 40 releases the tool 11 , and the seat 20 moves downward to make the mount 33 rotate to a desired tool 11 under the driving spindle 40 , and then the seat 20 moves upward and the driving spindle 40 engages the tool 11 . After the driving spindle 40 engages the tool 11 , the seat 20 moves vertically and the working head 4 moves horizontally to cooperate with the monitor 34 to measure the length of the tool 11 on the driving spindle 40 , such that the opening of the case 30 is closed to finish onetime of tool changing operation.

Referring to FIG. 6 , a mount 33 of the multi-spindle machining machine with a tool changing mechanism according to a second embodiment of the present invention includes a plurality of slots 35 formed on an upper and a lower side surfaces in a line arrangement, and the rotary shaft 21 actuates the mount 33 to rotate 180 degrees/pre time.

Referring to FIG. 7 , a mount 33 of the multi-spindle machining machine with a tool changing mechanism according to a third embodiment of the present invention includes a plurality of slots 35 formed on an upper and a lower side surface in an annularly spaced arrangement, and the rotary shaft 21 actuates the mount 33 to an angle so that a distal end of one of the tools 11 faces upward.

With reference to FIGS. 8 and 9 , the chamber 12 of the base 1 includes a dust collecting mechanism 7 to collect chips and cutting oil generating from the nozzle 41 . The dust collecting mechanism 7 includes a groove 70 , a tank 71 , a dust collector 72 , and a switching device 73 , wherein

the groove 70 is disposed on a lower side of the carrier 2 of the base 1 and formed in a funnel shape to receive the chips and the cutting oil generating from a working process, and includes a pipe 74 communicating with a bottom portion thereof, the pipe 74 includes a first outlet 75 on a bottom end thereof and a second outlet 76 on a wall of one side thereof.

The tank 71 is located below the first outlet 75 to receive the cutting oil falling from the first outlet 75 .

The dust collector 72 is connected to the second outlet 76 by using a connecting pipe 77 so as to draw chips from the second outlet 76 .

The switching device 73 includes a plate member 78 and a controlling pillar 79 . The plate member 78 is disposed in the pipe 74 to movably cover the first outlet 75 and the second outlet 76 . The controlling pillar 79 is disposed outside the pipe 74 to drive the plate member 78 to swing.

As shown in FIG. 8 , when the controlling pillar 79 drives the plate member 78 to cover the first outlet 75 , the dust collector 72 is started to draw wind and control the nozzle 41 to stop spraying cutting oil, having a dry cutting process.

As illustrated in FIG. 9 , when the controlling pillar 79 drives the plate member 78 to cover the second outlet 76 , the dust collector 72 is closed automatically to control the nozzle 41 to spray cutting oil, having a wet cutting process.

While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.