TWM510805U - CNC dual-shaft transmission device - Google Patents

Description

CNC double spindle transmission

The present invention relates to a CNC processing machine, and more particularly to a CNC dual spindle transmission.

Referring to FIG. 1, a C-type vertical machining machine 10 is disclosed in the application of the Japanese Patent Application No. 099205341, which has a base 11, a saddle 12 disposed on the base 11, and a saddle. a table 13 on the 12, a column 14 fixed at the rear of the base 11, two spindle head slides 15 disposed on the column 14, two sets are disposed on the column 14 and can respectively drive the heads to slide a servo drive unit 16 for moving the upper and lower sides (double Z-axis), and two first and second main shafts 17 respectively disposed at the front end of the spindle head slides 15, and a plurality of workpieces can be placed on the table 13 ( The first and second spindles 17 can simultaneously process two workpieces, thereby achieving a double-efficiency machining operation.

Although the C-type vertical machining machine 10 can improve the machining efficiency, there are still defects in use. The conventional C-type vertical machining machine 10 is provided with two sets of servo drive units 16 respectively driving the spindle heads to slide. The seat 15 moves. Since each set of servo drive units 16 has a two-wire rail, a ball screw, a four-slider and a servo motor, the cost of setting the two sets of servo drive units 16 is quite high, and because Set two groups In relation to the servo drive unit 16, the column 14 needs to have a relatively large area to arrange a total of four line rails side by side, the volume of the overall machine becomes large, the material cost is increased, and a considerable plant area is also occupied.

Referring to FIG. 2 and FIG. 3, in order to solve the shortcomings of the above-mentioned C-type vertical integrated machining machine 10, the present invention develops a double-spindle C-type vertical integrated machining machine 20 arranged in the X-axis direction with double Z-axis functions, And has been proposed as the Republic of China certificate number No. M404747 patent, the dual-spindle C-type vertical machining machine 20 has a base 21, a saddle 22 disposed on the base 21 and movable back and forth, and a a table 23 on the saddle 22 and movable to the left and right, a column 24 fixed at the rear of the base 21, a spindle head slide 25 disposed on the column 24 and movable up and down, and a column disposed on the column a first Z-axis servo drive unit 26 on the 24th and capable of driving the entire spindle head slider 25 to move up and down, a first spindle 27 disposed at the front end of the spindle head slider 25, and a head spindle 27 disposed at the spindle head a second main shaft 28 at the front end of the sliding block 25 and movable up and down, and a second Z-axis servo driving unit 29 disposed on the main shaft head sliding seat 25 and capable of driving the second main shaft 28 to move up and down (see FIG. 3) ). The lower end of the first main shaft 27 and the second main shaft 28 are respectively configured to clamp and fix a cutter (not shown), and the tool replenishment of the first main shaft 27 and the second main shaft 28 are respectively performed by the first Z-axis The servo drive unit 26 and the second Z-axis servo drive unit 29 are provided. The first main shaft 27 and the second main shaft 28 are disposed in a left-right direction in the X-axis direction.

The two-spindle C-type vertical machining machine 20 simultaneously drives the first main shaft 27 and the second main shaft 28 to move up and down along the Z-axis direction by a spindle head slide 25, and can be servoed by the second main shaft 28 Individual correction And moving up and down, thereby effectively reducing the size of the machine, saving costs, and at the same time achieving double processing efficiency and the ability to process large and small workpieces.

However, the above-mentioned dual-spindle C-type vertical machining machine 20 still has the following disadvantages in need of improvement: since the first main shaft 27 and the second main shaft 28 are both disposed on the main shaft head slide 25, the first A main shaft 27, the second main shaft 28 and the main shaft head slide 25 are integrated, and a first Z-axis servo drive unit 26 for servo-driving the second main shaft 28 is also disposed on the main shaft. The head slider 25 is so that the weight of the spindle head slider 25 itself plus the weight of the twin spindles 27, 28 and the second Z-axis servo drive unit 29, so that the spindle head slider 25 is subjected to The inertia weight is large, which affects the servo drive precision and acceleration of the first Z-axis servo drive unit 26 to the spindle head slider 25, and the first Z-axis servo drive unit 26 needs to increase its driving horsepower. In addition, the spindle head slider 25 having a large inertia weight also accelerates the wear of the components of the first Z-axis servo drive unit 26.

Furthermore, Japanese Patent Laid-Open Publication No. SHO-63-212448 discloses a twin-spindle vertical integrated machining machine. Although the composition and configuration are different from the above-described dual-spindle C-type vertical integrated machining machine 20, the same is in that: A Z-axis servo drive unit drives a spindle head slide for up and down movement, and a first spindle, a second spindle movable up and down, and a second spindle can be driven on the spindle head slide The second Z-axis servo drive unit moves up and down, so as to effectively reduce the size of the machine and save costs, and at the same time achieve double efficiency and size for the cutting time The workpiece can be processed. Similarly, there is also the disadvantage that the above-described spindle head slider has an excessive inertia weight.

In addition, the conventional CNC horizontal double-spindle integrated processing machine also has the same disadvantages as the above-mentioned C-type vertical integrated processing machine 10. Therefore, referring to FIG. 4 and FIG. 5, the present invention is to solve the traditional CNC horizontal double-spindle integrated processing machine. Disadvantages, a CNC horizontal double-spindle efficiency center processing machine 30 has been developed, and has been proposed as the Republic of China certificate number No. M454899 patent, the CNC horizontal double-spindle efficiency center processing machine 30 has a machine unit 31 And a processing head unit 32. The machine unit 31 includes a base 311, a column 312 disposed at a rear of the base 311, and a table 313 disposed in front of the base 311 and movable in a front-rear direction Y and a left-right direction X. The processing head unit 32 includes a slider 321 movably disposed on the column 312 and movable in an up and down direction Z, and a first spindle 322 fixedly disposed on the slider 321 in the front and rear direction Y. The front and rear direction Y is movable on the sliding block 321 and is adjacent to the first main shaft 322 and adjacent to the second main shaft 323, and a fixed arrangement on the sliding block 321 can drive the second main shaft 323 to extend along the front and rear direction Y. The mobile drive component 324 is out. The first main shaft 322 and the second main shaft 323 are all disposed on the sliding seat 321 , thereby effectively reducing the size of the machine and saving the cost, and simultaneously achieving double processing efficiency for the cutting processing time and the size of the workpiece. The effect of processing is possible. However, the slider 321 of the CNC horizontal double-spindle double efficiency center processing machine 30 also bears the disadvantages of carrying the first and second spindles 322, 323 and the drive assembly 324 with excessive inertia weight.

Therefore, the object of the present invention is to provide a CNC twin-spindle transmission capable of reducing the size of the machine and improving the machining efficiency.

Therefore, the new CNC dual-spindle transmission device is suitable for being installed in a CNC double-spindle integrated processing machine, and is provided for a first main shaft and a second main shaft of the CNC double-spindle integrated processing machine, and the CNC double-spindle integrated processing machine further has a a base, a processing platform movably disposed on the base, and a post standing on the rear of the base in an up-and-down direction, the CNC dual-spindle transmission comprising: a line rail set, a first slide a second sliding seat, a first power unit and a second power unit.

The track group is disposed on the column, and includes two line rails extending in the up and down direction and spaced apart in a left and right direction. The first sliding seat is slidably disposed on the line rail set and is disposed for the first main shaft, and includes a first right slider group and a first sliding portion respectively respectively connected to the line rails and having a plurality of first sliders respectively A left slider set. The second sliding seat is disposed on the line rail group at a distance from the first sliding seat along the first sliding seat, and is disposed for the second main shaft, and includes sliding respectively on the line And a second right slider group and a second left slider group respectively having a plurality of second sliders. The first power unit is disposed on the column and can drive the first slider to move in the up and down direction. The second power unit is disposed on the column and can drive the second slider to move in the up and down direction. The first and second right slider groups are slid on one of the line rails, and the first and second left slider groups are slid on the other of the line rails, and are slid on the same line. The pitch of the first sliders of the rail is different from the pitch of the second sliders, and the first and second sliders are staggered along the up and down direction.

The effect of the present invention is that the second sliding seat is slidably disposed on the line rails spaced apart from the first sliding seat by the first sliding seat in the left and right direction, and is respectively provided for the first and second lines. The main shaft is disposed, and is respectively driven by the first and second power unit driving in the up and down direction, so as to achieve the minimum slide rail setting for two slides that can independently drive the sliding, thereby achieving effective Reduce the size of the machine, save costs, and at the same time achieve double processing efficiency and the ability to process large and small workpieces. In addition, the two independently driveable sliding seats respectively carry the weight of the first and second main shafts respectively, and the sliding seats have been reduced to nearly half of the carrying weight and half of the seats compared to the conventional spindle head. The body weight, therefore also solves the two spindles of the conventional two-spindle C-type vertical machining machine are arranged on the spindle head slide and integrated with the spindle head slide, and slide on the spindle head When the seat moves the double main shaft in the up and down direction, the inertia of the integrated three is too large.

100‧‧‧Small workpiece

200‧‧‧ Large workpiece

41‧‧‧First spindle

42‧‧‧second spindle

43‧‧‧Base

44‧‧‧ saddle

45‧‧‧Processing platform

46‧‧‧ column

5‧‧‧Track group

51‧‧‧track

600‧‧‧Remedy gap

61‧‧‧First slide

611‧‧‧ first body

612‧‧‧First right fixed part

613‧‧‧First left fixed part

614‧‧‧First right slider set

615‧‧‧First left slider set

616‧‧‧Perforation

617‧‧‧First slider

618‧‧‧through holes

62‧‧‧Second slide

621‧‧‧Second body

622‧‧‧Second right fixed part

623‧‧‧Second Left Fixed Department

624‧‧‧Second right slider set

625‧‧‧Second left slider set

626‧‧‧second slider

627‧‧‧With holes

71‧‧‧First Power Unit

711‧‧‧First servo motor

712‧‧‧First bearing housing

713‧‧‧First screw

714‧‧‧First Nut Holder

72‧‧‧Second power unit

721‧‧‧Second servo motor

722‧‧‧Second bearing

723‧‧‧Second screw

724‧‧‧Second nut seat

X‧‧‧ direction

Y‧‧‧ direction

Z‧‧‧Up and down direction

Other features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments of the drawings, wherein: Figure 1 is a front view of a conventional C-type vertical machining machine; Front view of a dual-spindle C-type vertical machining machine with X-axis function arranged in the X-axis direction; Figure 3 is a side view of the dual-spindle C-type vertical machining machine arranged in the X-axis direction of the double Z-axis function Figure 4 is a side view of a conventional CNC horizontal double spindle multiple efficiency center processing machine; Figure 5 is a front view of the CNC horizontal double-spindle double efficiency center processing machine; Figure 6 is a perspective view showing a first embodiment of the novel CNC dual main transmission device mounted on a CNC double-spindle vertical machining machine; Figure 7 is a partial exploded perspective view of the first embodiment of the first track, a first and second slide, a first and second power unit and the CNC double spindle vertical machining machine First, the arrangement relationship of the second main shaft; FIG. 8 is a schematic view showing the arrangement relationship between the first and second sliding seats of the first embodiment and the line rail group; FIG. 9 is a front view illustrating the first implementation For example, a first and a second spindle can be separately driven for processing a plurality of small workpieces; FIG. 10 is a front view showing that the first and second spindles of the first embodiment can be separately processed for processing a large workpiece; 11 is a perspective view showing a second embodiment of the novel CNC dual main transmission device mounted on a CNC double spindle horizontal integrated machining machine; FIG. 12 is a partial exploded perspective view showing the first track assembly of the first embodiment , a first and second slide, The first and second power units are disposed in relationship with a first and second main shaft of the CNC double-spindle horizontal machining machine; FIG. 13 is a schematic view showing the first and second sliding seats of the first embodiment; Figure 14 is a front view showing the first embodiment of the first embodiment of the first and second spindles respectively for processing a plurality of small workpieces; and Figure 15 is a front view showing the first In one embodiment, the first and second spindles can be separately driven to process a large workpiece.

Before the detailed description, it should be noted that the relative positional terms used in the entire specification, such as the left-right direction X, the front-rear direction Y, and the upright direction Z are based on the orientations shown in the respective figures, and the left-right direction X and the The front-rear direction Y and the upright direction Z are perpendicular to each other.

Referring to FIG. 6, FIG. 7 and FIG. 8, a first embodiment of the novel CNC twin-spindle transmission device is mounted on a CNC double-spindle vertical integrated processing machine, and is provided for the CNC double-spindle vertical integrated processing machine. A spindle 41 and a second spindle 42 are disposed in an up and down direction Z. The CNC twin spindle vertical machining machine further has a base 43, a saddle 44, a processing platform 45, and a column 46. The saddle 44 is reciprocally disposed in the front and rear direction Y to the base 43. The processing platform 45 is reciprocally movable in a left-right direction X to the saddle 44. The column 46 is placed at a rear of the base 43 in an up and down direction Z. The lower end of both the first main shaft 41 and the second main shaft 42 can hold and hold a cutter (not shown), and both can perform workpiece machining along the up and down direction Z.

The CNC twin-spindle transmission includes a linear track set 5, a first slide 61, a second slide 62, a first power unit 71 and a second power unit 72.

The track set 5 is disposed on the upright 46 and includes two line rails 51 extending in the up and down direction Z and spaced apart in the left and right direction X.

The first sliding seat 61 is integrally formed and slidably disposed on the wire rail set 5, and includes a first seat body 611, a first right fixing portion 612, two second left fixing portions 613, and a first right sliding portion. Block group 614, a first left slider set 615 and a perforation 616. The first seat body 611 is provided for the first main shaft 41. The The first right fixing portion 612 extends outward from the first seat body 611 to one of the line rails 51 in front of the right side. The first left fixing portions 613 extend outward from the first base body 611 to the line rails 51 which are located in front of the other of the left side and are arranged at intervals in the vertical direction Z. The first right slider group 614 is fixed on the first right fixing portion 612 and has two first sliders 617 that are slid to the corresponding line rails 51 . The first left slider group 615 has two first sliders 617 fixed to the first left fixing portions 613 and sliding to the corresponding line rails 51 . The through hole 616 is disposed in the left and right direction X and is disposed between the first and second left fixing portions 613 .

The second sliding seat 62 is integrally formed and spans the first sliding seat 61 in the left-right direction X and is slidably disposed on the linear rail group 5 at a distance from the first sliding seat 61. The second sliding seat 62 includes a second seat body 621 , two second right fixing portions 622 , a second left fixing portion 623 , a second right slider group 624 , and a second left slider group 625 . The second base 621 is disposed on the second main shaft 42 and spaced apart from the first base 611 in the left-right direction X. The second right fixing portions 622 extend outward from the second seat body 621 to one of the line rails 51 in front of the right side, and are arranged at intervals in the up and down direction Z. The second left fixing portion 623 extends outward from the second seat body 621 to pass through the through hole 616 of the first sliding seat 61 to the front of the other of the left side of the line rail 51. The second right slider set 624 has two second sliders 626 fixed to the second right fixing portions 622 and sliding to the corresponding line rails 51 . The second left slider group 625 is fixed to the second left fixing portion 623 and has two second sliders 626 that are slid to the corresponding line rails 51 .

However, referring to Figure 8, located in front of and adjacent to the same line rail 51 There is a correction gap 600 between the first and second right fixing portions 612 and 622 and between the first and second left fixing portions 613 and 623. The pitches of the first sliders 617 that are slid on the same track 51 are different from the pitches of the second sliders 626, and the first and second sliders 617, 626 are staggered in the up and down direction Z. In the present embodiment, the first sliders 617 that are slid to the right side rails 51 are located between the second sliders 626, and the second sliders 626 that are slid to the left side rails 51 are located at the second sliders 626. Wait for the first slider 617.

The first power unit 71 is disposed on the upright 46, and can drive the first slide 61 to move along the up and down direction Z, and includes a first servo motor 711 and a first bearing block 712, and a connection a first screw 713 between the first servo motor 711 and the first bearing block 712 and driven by the first servo motor 711, and a first screw connecting the first screw 713 and the first seat body 611 Cap 714.

The second power unit 72 is disposed on the upright 46 and can drive the second slide 42 to move along the up and down direction Z, and includes a second servo motor 721 and a second bearing seat 722 spaced apart from each other. a second screw 723 between the second servo motor 721 and the second bearing block 722 and driven by the second servo motor 721, and a second screw connecting the second screw 723 and the second base 621 Cap 724.

The above is an overview of the shape of the member of the first embodiment of the novel CNC twin-spindle transmission; and then, the use action of the first embodiment of the present invention and the expected achievable effects are as follows: Referring to FIG. 6 and FIG. When the user wants to process a plurality of small workpieces 100, the small workpieces 100 can be placed on the processing platform. 45, and the first power unit 71 and the second power unit 72 are respectively controlled to lower the first main shaft 41 and the second main shaft 42 to the same processing height, such that the first main shaft 41 and the second main shaft 42, the small workpieces 100 can be simultaneously processed, thereby achieving double efficiency in the cutting processing time.

Referring to FIG. 6 and FIG. 10, when the user wants to process a large workpiece 200, in order to avoid interference between the second spindle 42 and the large workpiece 200, and due to the adjacent first and second right fixing portions 612, Between the 622 and the first and second left fixing portions 613 and 623, a correction gap 600 is provided. The user can control the movement of the second sliding seat 62 relative to the first sliding seat 61 to drive the second main shaft 42 to rise. The large workpiece 200 can be subjected to various machining operations by the first spindle 41.

According to the above description, the first embodiment of the present invention is configured such that the second embodiment of the present invention is slidably spaced from the first carriage 61 by the second carriage 62 spanning the first carriage 61 along the left and right direction X. The first and second main shafts 41 and 42 are respectively disposed on the line rails 51, and are respectively driven by the first and second power units 71 and 72 to move along the vertical direction Z, thereby achieving the minimum line. The rail 51 is provided for sliding the two slides 61, 62 which can be independently driven to slide, thereby effectively reducing the size of the machine and saving cost, and at the same time achieving double processing efficiency and size for the cutting processing time. The workpiece can be processed. In addition, the two independently driveable sliding carriages 61, 62 respectively carry the weights of the first and second main shafts 41, 42. Compared to the conventional spindle heads, the sliding seats 61, 62 have been reduced to Nearly half of the load weight and half of the weight of the seat, thus also solving the conventional double master The dual spindles of the shaft C-type vertical machining machine are disposed on the spindle head sliding seat and integrated with the spindle head sliding seat, and the spindle head sliding seat drives the double spindle to move in the up and down direction The shortcomings caused by the excessive inertia of the three integrated ones.

Referring to FIG. 11, FIG. 12 and FIG. 13, a second embodiment of the novel CNC twin-spindle transmission device is mounted on a CNC double-spindle horizontal comprehensive processing machine, and is provided for the CNC double-spindle horizontal integrated processing machine. A spindle 41 and a second spindle 42 are transversely disposed in a front-rear direction Y. The CNC dual-spindle horizontal machining machine further has a base 43, a saddle 44, a processing platform 45, and a column 46. The saddle 44 is reciprocally movable in the front-rear direction Y to the base 43. The processing platform 45 is reciprocally movable in a left-right direction X to the saddle 44. The column 46 is placed at a rear of the base 43 in an up and down direction Z. The front end of both the first main shaft 41 and the second main shaft 42 can hold and hold a cutter (not shown), and both can perform workpiece machining along the front-rear direction Y.

This second embodiment is substantially identical to the first embodiment except that the first carriage 61 cancels the perforations 616. The first base 611 and the second base 621 are arranged along the front-back direction Y, and the first slide 61 further includes a through hole disposed in the front and rear direction Y. The hole 618 further includes a through hole 627 extending through the second seat body 621 in the front-rear direction Y. In the assembly, the first main shaft 41 is disposed in the first seat body 611 through the through hole 627 of the second sliding seat 62 along the front and rear direction Y. The second main shaft 42 is along the front and rear sides. The direction Y is disposed in the second seat body 621 through the through hole 618 of the first sliding seat 61. Each of the through holes 618 and 627 through which the first and second main shafts 41 and 42 are respectively provided has a space for moving the first and second main shafts 41 and 42 in the vertical direction Z.

However, referring to FIG. 13, the arrangement relationship of the first and second slides 61, 62 of the second embodiment being slidably disposed on the line rails 51 is the same as that of the first embodiment, that is, in front of the same line rail 51. A correction gap 600 is provided between the adjacent first and second right fixing portions 612 and 622 and between the first and second left fixing portions 613 and 623. The pitches of the first sliders 617 that are slid on the same track 51 are different from the pitches of the second sliders 626, and the first and second sliders 617, 626 are staggered in the up and down direction Z. In the present embodiment, the first sliders 617 that are slid to the right side rails 51 are located between the second sliders 626, and the second sliders 626 that are slid to the left side rails 51 are located at the second sliders 626. Wait for the first slider 617.

The above is an overview of the shape of the member of the second embodiment of the novel CNC twin-spindle transmission; and then, the operation of the second embodiment of the present invention and the expected achievable effects are as follows: Referring to FIG. 11 and FIG. When the user wants to process a plurality of small workpieces 100, the small workpieces 100 may be placed on the processing platform 45, and the first power unit 71 and the second power unit 72 are controlled to respectively make the first spindle. The first spindle 41 and the second spindle 42 can simultaneously process the small workpieces 100, thereby achieving double efficiency in the cutting processing time. Work effect.

Referring to FIG. 11 and FIG. 15, when the user wants to process a large workpiece 200, in order to avoid interference between the second spindle 42 and the large workpiece 200, and due to the adjacent first and second right fixing portions 612, Between the 622 and the first and second left fixing portions 613 and 623, a correction gap 600 is provided. The user can control the movement of the second sliding seat 62 relative to the first sliding seat 61 to drive the second main shaft 42 to rise. The large workpiece 200 can be subjected to various machining operations by the first spindle 41.

As can be seen from the above description, the first embodiment of the novel CNC twin-spindle transmission can achieve the same functions and advantages as the second embodiment.

In summary, the new type of CNC dual-spindle transmission device is slidably disposed on the line rails at intervals from the first sliding seat 61 by the second sliding seat 62 spanning the first sliding seat 61 along the left and right direction X. 51. The first and second main shafts 41 and 42 are respectively disposed, and are respectively driven by the first and second power units 71 and 72 to move along the vertical direction Z, thereby achieving the minimum amount of the line rail 51. The two slides 61 and 62 which can be independently driven to slide are slid, thereby effectively reducing the size of the machine and saving cost, and at the same time achieving double processing efficiency for cutting processing time and processing for large and small workpieces. Effect. In addition, the two independently driveable sliding carriages 61, 62 respectively carry the weights of the first and second main shafts 41, 42. Compared to the conventional spindle heads, the sliding seats 61, 62 have been reduced to Nearly half of the load weight and half of the weight of the seat, so that the two spindles of the conventional two-spindle C-type vertical machining machine are also disposed on the spindle head slide and integrated with the spindle head slide And the spindle head slides the double spindle to move up and down In the process, the shortcomings caused by the excessive inertia of the three integrated ones can indeed achieve the purpose of the present invention.

However, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made in accordance with the scope of the present patent application and the contents of the patent specification, All remain within the scope of this new patent.

41‧‧‧First spindle

42‧‧‧second spindle

43‧‧‧Base

44‧‧‧ saddle

45‧‧‧Processing platform

46‧‧‧ column

5‧‧‧Track group

51‧‧‧track

61‧‧‧First slide

612‧‧‧First right fixed part

614‧‧‧First right slider set

616‧‧‧Perforation

617‧‧‧First slider

62‧‧‧Second slide

622‧‧‧Second right fixed part

624‧‧‧Second right slider set

626‧‧‧second slider

71‧‧‧First Power Unit

711‧‧‧First servo motor

712‧‧‧First bearing housing

713‧‧‧First screw

72‧‧‧Second power unit

721‧‧‧Second servo motor

722‧‧‧Second bearing

723‧‧‧Second screw

X‧‧‧ direction

Y‧‧‧ direction

Z‧‧‧Up and down direction

Claims (6)

The utility model relates to a CNC double spindle transmission device, which is suitable for being installed in a CNC double spindle integrated processing machine, and is provided for a first spindle and a second spindle of the CNC double spindle integrated processing machine, the CNC double spindle integrated processing machine further has a base a processing platform movably disposed on the base, and a column standing on the rear of the base in an up-and-down direction, the CNC dual-spindle transmission comprising: a line of rails disposed on the column, and The utility model comprises two line rails extending in the up-and-down direction and arranged in parallel in a left-right direction; a first sliding seat is slidably disposed on the line rail group, and is disposed for the first main shaft, and includes sliding respectively on the line a first right slider group and a first left slider group having a plurality of first sliders; a second slider spanning the first slider in the left and right direction to be opposite to the first slider Slidingly disposed on the track group and disposed on the second spindle, and including a second right slider group and a second left slide respectively respectively sliding to the line rails and having a plurality of second sliders respectively a block group; a first power unit disposed on the column, and Driving the first sliding seat to move in the up and down direction; and a second power unit disposed on the column and driving the second sliding seat to move in the up and down direction; wherein the first and second right slider groups One of the first and second left slider groups is slid to the other of the rails, and the first and second left sliders are slid to the other of the rails. The spacing is different from the spacing of the second sliders, and the 1. The second sliders are staggered along the up and down direction. The CNC twin-spindle drive of claim 1, wherein the first carriage comprises a first seat provided for the first spindle, and a first seat extends outwardly to the track. a first right fixing portion located in front of one of the right sides and fixed to the first right slider group, and two first extending from the first seat body to the line rails, which are located in front of the other one on the left side and respectively respectively a first left fixing portion fixed to the first sliders of the first left slider group, and a through hole disposed in the left and right direction and disposed between the first left fixing portions The second sliding seat includes a second seat body disposed for the second main shaft and spaced apart from the first seat body in the left and right direction, and two second body extending outwardly from the second seat body to the right side rail. a second right fixing portion fixed to the front of the second right slider group and a second right fixing portion extending outwardly through the first sliding seat a second left fixing portion of the line rails which is located in front of the other of the left side and is fixed to the second left slider group, the first right solid The fixed portion is located between the second right fixing portions, the second left fixing portion is located between the first left fixing portions, and between the adjacent first and second right fixing portions and the adjacent first and second left portions There is a correction gap between the fixed parts. The CNC twin-spindle drive of claim 1, wherein the first carriage comprises a first seat provided for the first spindle, and a first seat extends outwardly to the track. a first right fixing portion located in front of one of the right sides and fixed to the first right slider group, and two extending outward from the first seat body to the line rails in front of the other of the left side and respectively The first of the first left slider sets a first left fixing portion fixed by the slider, the second sliding seat includes a second seat body disposed for the second main shaft and spaced apart from the first seat body along the front and rear direction, and the second seat body Extending outwardly to the second rails of the second rails of the second right slider group, and extending outwardly from the second base body a second left fixing portion for the second left slider group to be located in front of the other of the left rails, and the first right fixing portion is located between the second right fixing portions, the second The left fixing portion is located between the first left fixing portions, and a correction gap is provided between the adjacent first and second right fixing portions and between the adjacent first and second left fixing portions. The CNC double-spindle transmission device of claim 3, wherein the first sliding seat further comprises a through hole disposed in the front and rear direction of the first seat body, the second sliding seat further comprising a The front and rear direction penetrates through the through hole of the second seat body, and the first main shaft extends along the front and rear direction and passes through the through hole of the second sliding seat, and the second main shaft extends along the front and rear direction and wears Through the through hole of the first sliding seat. The CNC twin-spindle transmission of claim 2 or 3, wherein the first slider and the second slider are integrally formed. The CNC dual-spindle transmission of any one of claims 1 to 4, wherein the first power unit comprises a first servo motor and a first bearing seat spaced apart from each other, and a first servo motor is coupled to the first servo motor And a first screw driven between the first bearing housing and the first servo motor, and a first nut seat connecting the first screw and the first seat body, the second power unit includes spaced apart a second servo motor and a second bearing housing, a second servo motor and the second shaft a second screw driven by the second servo motor and a second nut seat connecting the second screw to the second seat.