Numerical control machining center driving mechanism

Abstract

The application provides a numerical control machining center driving mechanism and relates to the field of numerical control equipment, which comprises the following steps: a first driving nut is rotatably connected at the bottom of a sliding drag plate horizontal plate, the first driving nut and a first lead screw jointly form a lead screw nut transmission mechanism; a second driving nut is rotatably connected at the back of a sliding drag plate vertical plate, the second driving nut and a second lead screw jointly form a lead screw nut transmission mechanism; a transmission assembly is arranged on the inner side of the sliding drag plate, a driving motor drives the first driving nut and the second driving nut to simultaneously rotate in opposite directions through the transmission assembly; and an angle adjusting assembly is arranged on the left side of the upper front end face of the beam. The same beam is used for simultaneous machining of multiple main shafts, transmission is realized through two lead screws, reverse gap adjustment can be realized, the machining progress and the use convenience are greatly improved, the existing problems of the numerical control machine tool driving mechanism, such as the existing cooperation gap and the influence on machining precision, are solved, and the existing driving mechanism can only support single-station machining.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of numerical control equipment, in particular to a numerical control machining center driving mechanism. BACKGROUND

[0002] Numerical control machining center is widely used for its automation, high machining precision and ability to process complex parts. The driving mechanism of numerical control machining center mainly adopts single screw transmission structure. The servo motor drives the ball screw to rotate, which drives the nut pair and the drag plate to move linearly along the guide rail.

[0003] For example, application number: CN200810016818.7 The present application belongs to the technical field of machine tools, and specifically relates to a numerical control turning and milling machine tool for turning and milling multi-sided shaft parts, bowl teeth and bevel gear parts. Its characteristics are: the movable platen device includes a large platen that can move linearly along the longitudinal direction of the bed body and a small platen that can move linearly along the transverse direction of the bed body; the large platen is located on the straight guide rule on the bed body, and the small platen is located on the straight guide rule provided on the large platen; an electronic tool rest and a milling tool rest are provided on the small platen; the rotating shaft of the cutter head of the milling tool rest is synchronously connected with the output shaft of the gear box; a plurality of turning tools are provided on the cutter head of the electronic tool rest, and a plurality of milling tools are uniformly distributed on the cutter head of the milling tool rest according to the needs of milling. It has the advantages of compact structure, low manufacturing cost, simple operation, high efficiency, milling function, automatic processing of shaft parts, high machining precision, accurate indexing, low production cost, etc.

[0004] The existing numerical control machine tool driving mechanism has a gap between the ball screw and the nut pair, which causes an idle stroke during reverse motion, directly affecting the positioning accuracy, especially in precision machining. In addition, long-term use of the screw will cause wear, resulting in an increasing reverse gap. The gap error can accumulate to more than 0.05mm, affecting the machining precision. At the same time, the existing driving mechanism can only realize single drag plate, and the single drag plate structure can only support single station machining, which cannot meet the demand of complex workpiece multi-process synchronous machining, and the equipment utilization rate is low. SUMMARY

[0005] The present application relates to a numerical control machining center driving mechanism, which can realize simultaneous machining of multiple spindles on the same beam, greatly improving work efficiency. The transmission is achieved by two screws, which can ensure stable transmission and adjust the reverse gap, greatly improving the machining progress and use convenience.

[0006] In a first aspect, the present application provides a numerical control machining center driving mechanism, which specifically comprises: a beam;

[0007] A plurality of sliding drag plates are provided, and the plurality of sliding drag plates are slidingly connected to the upper part of the beam.

[0008] The first screw rod is fixedly installed in the middle of the upper end face of the cross beam through the fixing assembly;

[0009] The second screw rod is installed in the middle of the front end face of the cross beam through the locking assembly, and the pitch of the second screw rod is the same as that of the first screw rod but in the opposite direction;

[0010] The driving motor is fixedly installed on the top of the sliding plate;

[0011] The first driving nut is rotatably connected to the bottom of the horizontal plate of the sliding plate, and the first driving nut and the first screw rod jointly constitute a screw nut transmission mechanism;

[0012] The second driving nut is rotatably connected to the rear of the vertical plate of the sliding plate, and the second driving nut and the second screw rod jointly constitute a screw nut transmission mechanism;

[0013] The transmission assembly is arranged on the inner side of the sliding plate, and the driving motor drives the first driving nut and the second driving nut to rotate in opposite directions through the transmission assembly;

[0014] The angle adjusting assembly is arranged on the left side of the upper front end face of the cross beam.

[0015] In at least some embodiments, the transmission assembly comprises:

[0016] The driving bevel gear is rotatably connected to the inner side of the sliding plate and coaxially fixedly connected to the end of the rotating shaft of the driving motor;

[0017] The driven bevel gear is rotatably connected to the inner side of the sliding plate and meshes with the driving bevel gear to jointly constitute a bevel gear transmission mechanism.

[0018] In at least some embodiments, the transmission assembly further comprises:

[0019] The first worm is coaxially fixedly connected to the rear end face of the driven bevel gear;

[0020] The first worm wheel is coaxially fixedly connected to the outer side of the first driving nut, and the first worm and the first worm wheel jointly constitute a worm and worm wheel transmission mechanism.

[0021] In at least some embodiments, the transmission assembly further comprises:

[0022] The second worm is coaxially fixedly connected to the bottom of the driving bevel gear;

[0023] The second worm wheel is coaxially fixedly connected to the outer side of the second driving nut, and the second worm and the second worm wheel jointly constitute a worm and worm wheel transmission mechanism.

[0024] In at least some embodiments, the fixing assembly comprises:

[0025] A lead screw support block is fixedly connected to the left and right sides of the upper end surface of the cross beam;

[0026] A lead screw pressing block is tightly connected to the top of the lead screw support block by bolts, a square hole is formed in the middle of the contact surface between the lead screw support block and the lead screw pressing block, the left and right ends of the first lead screw are first square shafts, the first square shafts are installed in the square hole, and the lead screw support block and the lead screw pressing block tightly press the first square shafts;

[0027] A lead screw baffle is tightly connected to the outer end surface of the lead screw support block and the lead screw pressing block by bolts.

[0028] In at least some embodiments, the locking assembly comprises:

[0029] A left support seat is fixedly connected to the left side of the front end surface of the cross beam;

[0030] A left locking pressing plate is tightly locked to the left end surface of the left support seat by bolts;

[0031] An angle adjusting end cover is provided with a square hole in the middle, the outer edge of the angle adjusting end cover is a left friction disc, the left friction disc is tightly pressed on the left side of the left support seat by the left locking pressing plate, the left side of the second lead screw is rotationally connected to the left support seat, and the left side second square shaft is inserted into the square hole in the middle of the angle adjusting end cover.

[0032] In at least some embodiments, the locking assembly further comprises:

[0033] A right support seat is fixedly connected to the right side of the front end surface of the cross beam, and the right side of the second lead screw is rotationally connected to the right support seat;

[0034] A right locking pressing plate is tightly locked to the right end surface of the left support seat by bolts;

[0035] A right locking end cover is provided with a square hole in the middle, the outer side of the right locking end cover is a right friction disc, the right friction disc is tightly pressed on the right side of the right support seat by the right locking pressing plate, and the right side second square shaft is inserted into the square hole in the middle of the right locking end cover.

[0036] In at least some embodiments, the angle adjusting assembly comprises:

[0037] An angle adjusting bolt is rotationally connected to the left front part of the cross beam;

[0038] An angle adjusting sliding block is slidingly connected to the left front part of the cross beam, and the angle adjusting bolt and the angle adjusting sliding block are threadedly connected to form a threaded transmission pair.

[0039] In at least some embodiments, the angle adjustment assembly further comprises:

[0040] The angle adjusting connecting rod is hingedly connected at one end to the front part of the angle adjusting slider, and is hingedly connected at the other end to the front part of the angle adjusting end cover, and the angle adjusting slider, the angle adjusting connecting rod, the angle adjusting end cover and the cross beam jointly form a slider-crank transmission mechanism.

[0041] The present application provides a numerical control machining center driving mechanism, which has the following advantages:

[0042] The present application adopts fixedly installed lead screws and rotating structure nuts to drive the carriages, and one lead screw can drive multiple carriages to work simultaneously, so that multiple different spindles can be installed on the same cross beam simultaneously, and the different spindles can perform different machining tasks according to machining requirements, such as milling, drilling, polishing, etc.

[0043] The present application simultaneously sets two groups of lead screws with the same pitch to drive the same carriage, in the traditional single lead screw driving mode, the carriage is easily affected by various factors during movement, such as wear of the lead screw, uneven load, etc.

[0044] The present application sets the two groups of lead screws to rotate in opposite directions, when it is necessary to adjust the reverse gap, only the rotation angle of one group of lead screws needs to be adjusted, since the two groups of lead screws rotate in opposite directions, adjusting the rotation angle of one group of lead screws will change the effect of the two groups of lead screws on the nut, thereby realizing accurate adjustment of the reverse gap.

[0045] The present application adopts the rotating lead screw mode to compensate for the axial reverse gap, and simultaneously ingeniously utilizes the slider-crank structure and the thread transmission structure, since the lead screw, the slider-crank structure and the thread transmission are all reduction transmission, very small reverse gap can be enlarged into a larger rotation angle of the angle adjusting bolt, and this enlargement also significantly improves the adjustment accuracy.

[0046] In summary, the application can realize the same beam on multi-spindle machining at the same time, greatly improve the work efficiency, through two screws transmission, can ensure the stability of transmission, and realize the adjustment of reverse gap, greatly improve the processing progress and use convenience. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical scheme of the embodiments of the application, the drawings of the embodiments will be briefly introduced below.

[0048] The drawings described in the following merely relate to some embodiments of the application, and are not limited to the application.

[0049] In the drawings:

[0050] Figure 1 The overall schematic diagram of the structure of the application is shown;

[0051] Figure 2 The schematic diagram of the structure of the application in the state of removing the sliding plate is shown;

[0052] Figure 3 The schematic diagram of the angle adjusting assembly of the application is shown;

[0053] Figure 4 The schematic diagram of the right locking assembly of the application is shown;

[0054] Figure 5 The schematic diagram of the right locking end cover and the right locking pressing plate of the application is shown;

[0055] Figure 6 The schematic diagram of the fixing assembly of the application is shown;

[0056] Figure 7 The schematic diagram of the bottom structure of the sliding plate of the application is shown;

[0057] Figure 8 The schematic diagram of the first screw and the second screw structure of the application is shown;

[0058] Figure 9 The schematic diagram of the transmission assembly structure of the application is shown;

[0059] LIST OF REFERENCE NUMERALS

[0060] 1, crossbeam; 101, left support seat; 102, right support seat; 2, first lead screw; 201, first square shaft; 3, second lead screw; 301, second square shaft; 4, sliding drag plate; 5, driving motor; 6, driving bevel gear; 601, second worm; 7, driven bevel gear; 701, first worm; 8, first driving nut; 801, first worm wheel; 9, second driving nut; 901, second worm wheel; 10, angle adjusting bolt; 11, angle adjusting slider; 12, angle adjusting connecting rod; 13, angle adjusting end cover; 1301, left friction disc; 14, left locking pressing plate; 15, right locking pressing plate; 16, right locking end cover; 1601, right friction disc; 17, lead screw support block; 18, lead screw pressing block; 19, lead screw baffle. DETAILED DESCRIPTION

[0061] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0062] Embodiment one: please refer to Figures 1 to 9 :

[0063] The present application provides a numerical control machining center driving mechanism, comprising: crossbeam 1;

[0064] Sliding drag plate 4, sliding drag plate 4 is provided with multiple pieces, multiple sliding drag plates 4 are slidingly connected to the upper part of crossbeam 1;

[0065] First lead screw 2, first lead screw 2 is fixedly installed on the middle of the upper end face of crossbeam 1 through a fixing assembly;

[0066] Second lead screw 3, second lead screw 3 is installed on the middle of the front end face of crossbeam 1 through a locking assembly, the screw pitches of second lead screw 3 and first lead screw 2 are same and the rotation directions are opposite;

[0067] Driving motor 5, driving motor 5 is fixedly installed on the top of sliding drag plate 4;

[0068] First driving nut 8, first driving nut 8 is rotationally connected to the bottom of the horizontal plate of sliding drag plate 4, first driving nut 8 and first lead screw 2 jointly constitute a lead screw nut transmission mechanism;

[0069] Second driving nut 9, second driving nut 9 is rotationally connected to the rear of the vertical plate of sliding drag plate 4, second driving nut 9 and second lead screw 3 jointly constitute a lead screw nut transmission mechanism;

[0070] The transmission assembly is arranged inside the sliding platform 4. The driving motor 5 drives the first driving nut 8 and the second driving nut 9 to rotate reversely through the transmission assembly.

[0071] In the embodiment of the present disclosure, as shown in Figure 2 and Figure 9 The transmission assembly comprises:

[0072] The driving bevel gear 6 is rotatably connected to the inner side of the sliding platform 4 and coaxially fixedly connected to the end of the rotating shaft of the driving motor 5.

[0073] The driven bevel gear 7 is rotatably connected to the inner side of the sliding platform 4 and engaged with the driving bevel gear 6 to form a bevel gear transmission mechanism. In use, the driving motor 5 drives the driven bevel gear 7 to rotate through the bevel gear transmission mechanism formed by the driven bevel gear 7 and the driving bevel gear 6.

[0074] In the embodiment of the present disclosure, as shown in Figure 2 and Figure 9 The transmission assembly further comprises:

[0075] The first worm 701 is coaxially fixedly connected to the rear end face of the driven bevel gear 7.

[0076] The first worm gear 801 is coaxially fixedly connected to the outer side of the first driving nut 8. The first worm 701 is engaged with the first worm gear 801 to form a worm gear transmission mechanism. In use, when the driven bevel gear 7 rotates, the driven bevel gear 7 drives the first driving nut 8 to rotate through the worm gear transmission mechanism formed by the first worm 701 and the first worm gear 801.

[0077] In the embodiment of the present disclosure, as shown in Figure 2 and Figure 9 The transmission assembly further comprises:

[0078] The second worm 601 is coaxially fixedly connected to the bottom of the driving bevel gear 6.

[0079] The second worm gear 901 is coaxially fixedly connected to the outer side of the second driving nut 9. The second worm 601 is engaged with the second worm gear 901 to form a worm gear transmission mechanism. In use, when the driving bevel gear 6 rotates, the driving bevel gear 6 drives the second driving nut 9 to rotate through the worm gear transmission mechanism formed by the second worm 601 and the second worm gear 901. Through the rotation of the second driving nut 9 and the first driving nut 8, the sliding platform 4 is driven to slide left and right through the lead screw transmission mechanism, thereby realizing left and right feeding.

[0080] In the embodiment of the present disclosure, as shown in Figure 6As shown, the fixing assembly comprises:

[0081] A lead screw support block 17 is fixedly connected to the left and right sides of the upper end face of the cross beam 1.

[0082] A lead screw pressing block 18 is tightly connected to the top of the lead screw support block 17 by bolts, and a square hole is formed in the middle of the contact surface between the lead screw support block 17 and the lead screw pressing block 18. The left and right ends of the first lead screw 2 are first square shafts 201, which are installed in the square hole, and the lead screw support block 17 and the lead screw pressing block 18 tightly press the first square shafts 201.

[0083] A lead screw baffle 19 is tightly connected to the outer end face of the lead screw support block 17 and the lead screw pressing block 18 by bolts. In use, the lead screw support block 17 and the lead screw pressing block 18 lock and tightly connect the first lead screw 2, and the lead screw baffle 19 tightly presses the two ends of the first lead screw 2, and the left and right positions of the first lead screw 2 can be finely adjusted during installation.

[0084] In the embodiments of the present disclosure, as shown in Figure 3 The locking assembly comprises:

[0085] A left support seat 101 is fixedly connected to the left side of the front end face of the cross beam 1.

[0086] A left locking pressing plate 14 is tightly locked on the left end face of the left support seat 101 by bolts.

[0087] An angle adjusting end cover 13 is provided with a square hole in the middle, and the outer edge of the angle adjusting end cover 13 is a left friction disc 1301. The left friction disc 1301 is tightly pressed on the left side of the left support seat 101 by the left locking pressing plate 14. The left side of the second lead screw 3 is rotationally connected to the left support seat 101, and the two end portions of the second lead screw 3 are second square shafts 301. The left second square shaft 301 is inserted and matched in the square hole in the middle of the angle adjusting end cover 13. In use, the left friction disc 1301 is tightly pressed by the left locking pressing plate 14 to fix the angle of the second lead screw 3, effectively avoiding the rotation of the second lead screw 3.

[0088] In the embodiments of the present disclosure, as shown in Figure 4 and Figure 5 The locking assembly further comprises:

[0089] A right support seat 102 is fixedly connected to the right side of the front end face of the cross beam 1, and the right side of the second lead screw 3 is rotationally connected to the right support seat 102.

[0090] A right locking pressing plate 15 is tightly locked on the right end face of the left support seat 101 by bolts.

[0091] Right locking end cover 16, right locking end cover 16 middle part is provided with square hole, the outside of right locking end cover 16 is right friction disc 1601, right locking pressure plate 15 is pressed in the right side of right support base 102, the second square shaft 301 of right side is inserted with the square hole of right locking end cover 16 middle part, in use, by right locking pressure plate 15, right friction disc 1601 is pressed in the right side of right support base 102, realizes the rotation locking of second lead screw 3.

[0092] Example two: please refer to Figure 3 :

[0093] The application provides a numerical control machining center driving mechanism, comprising:

[0094] The angle adjusting assembly is arranged on the left side of the upper front end face of the cross beam 1.

[0095] As shown in the embodiment of the present disclosure, Figure 3 The angle adjusting assembly comprises:

[0096] The angle adjusting bolt 10 is rotatably connected to the left front portion of the cross beam 1.

[0097] The angle adjusting slider 11 is slidably connected to the left front portion of the cross beam 1, and the angle adjusting bolt 10 is threadedly connected with the angle adjusting slider 11 to form a threaded transmission pair, in use, when the angle adjusting bolt 10 is rotated, the angle adjusting bolt 10 drives the angle adjusting slider 11 to slide up and down through the threaded transmission pair formed by the angle adjusting bolt 10 and the angle adjusting slider 11.

[0098] As shown in the embodiment of the present disclosure, Figure 3 The angle adjusting assembly further comprises:

[0099] One end of the angle adjusting link 12 is hingedly connected to the front portion of the angle adjusting slider 11, and the other end of the angle adjusting link 12 is hingedly connected to the front portion of the angle adjusting end cover 13, and the angle adjusting slider 11, the angle adjusting link 12, the angle adjusting end cover 13 and the cross beam 1 jointly form a crank slider transmission mechanism, in use, when the angle adjusting slider 11 slides up and down, the angle adjusting slider 11 drives the angle adjusting end cover 13 to rotate through the crank slider transmission mechanism formed by the angle adjusting slider 11, the angle adjusting link 12, the angle adjusting end cover 13 and the cross beam 1, so as to adjust the installation angle of the second lead screw 3, and further adjust the reverse clearance.

[0100] The working principle of the embodiment is as follows:

[0101] In the numerical control machining process, the driving motor 5 drives the driven bevel gear 7 to rotate through the bevel gear transmission mechanism composed of the driven bevel gear 7 and the driving bevel gear 6, the driven bevel gear 7 drives the first driving nut 8 to rotate through the worm gear transmission mechanism composed of the first worm 701 and the first worm gear 801, the driving bevel gear 6 drives the second driving nut 9 to rotate through the worm gear transmission mechanism composed of the second worm 601 and the second worm gear 901, through the rotation of the second driving nut 9 and the first driving nut 8, the sliding drag plate 4 is driven to slide left and right through the lead screw transmission mechanism, left and right feeding is realized, the drag plate is driven by two groups of lead screw nut structures, the drag plate is more uniform in stress, the transmission is more smooth, and meanwhile, multiple drag plate actions can be realized at the same time, and meanwhile, each drag plate can be moved as required, and transmission between the drag plates will not be disturbed.

[0102] When the reverse gap needs to be compensated, the bolts on the left locking plate 14 and the right locking plate 15 are loosened a little, and then the angle adjusting bolt 10 is rotated, the angle adjusting bolt 10 drives the angle adjusting slider 11 to slide up and down through the threaded transmission pair composed of the angle adjusting bolt 10 and the angle adjusting slider 11, the angle adjusting slider 11 drives the angle adjusting end cover 13 to rotate through the crank slider transmission mechanism composed of the angle adjusting slider 11, the angle adjusting connecting rod 12, the angle adjusting end cover 13 and the cross beam 1, the installation angle of the second lead screw 3 is adjusted, and then the reverse gap is adjusted.

[0103] In this paper, the following points need attention:

[0104] 1. The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0105] 2. In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0106] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A CNC machining center drive mechanism characterized by, Include: Crossbeam (1); Sliding plate (4), the sliding plate (4) is provided with a plurality of pieces, and the plurality of sliding plates (4) are slidingly connected to the upper part of the crossbeam (1); First lead screw (2), the first lead screw (2) is fixedly installed in the middle of the upper end face of the crossbeam (1) through a fixing assembly; Second lead screw (3), the second lead screw (3) is installed in the middle of the front end face of the crossbeam (1) through a locking assembly, the second lead screw (3) and the first lead screw (2) have the same pitch and opposite rotation directions; Driving motor (5), the driving motor (5) is fixedly installed on the top of the sliding plate (4); First drive nut (8), the first drive nut (8) is rotatably connected to the bottom of the horizontal plate of the sliding plate (4), and the first drive nut (8) and the first lead screw (2) jointly constitute a lead screw nut transmission mechanism; Second drive nut (9), the second drive nut (9) is rotatably connected to the rear of the vertical plate of the sliding plate (4), and the second drive nut (9) and the second lead screw (3) jointly constitute a lead screw nut transmission mechanism; Transmission assembly, the transmission assembly is arranged on the inner side of the sliding plate (4), the driving motor (5) drives the first drive nut (8) and the second drive nut (9) to rotate in opposite directions at the same time through the transmission assembly; Angle adjusting assembly, the angle adjusting assembly is arranged on the upper part of the front end face of the crossbeam (1).

2. The driving mechanism of the numerical control machining center according to claim 1, wherein the transmission assembly comprises: Driving bevel gear (6), the driving bevel gear (6) is rotatably connected to the inner side of the sliding plate (4), and the driving bevel gear (6) is coaxially fixedly connected to the end of the rotating shaft of the driving motor (5); Driven bevel gear (7), the driven bevel gear (7) is rotatably connected to the inner side of the sliding plate (4), and the driven bevel gear (7) is engaged with the driving bevel gear (6) to jointly constitute a bevel gear transmission mechanism.

3. The driving mechanism of the numerical control machining center according to claim 2, wherein the transmission assembly further comprises: First worm (701), the first worm (701) is coaxially fixedly connected to the rear end face of the driven bevel gear (7); First worm wheel (801), the first worm wheel (801) is coaxially fixedly connected to the outer side of the first drive nut (8), and the first worm (701) is engaged with the first worm wheel (801) to jointly constitute a worm and gear transmission mechanism.

4. The driving mechanism of the numerical control machining center according to claim 3, wherein the transmission assembly further comprises: Second worm (601), the second worm (601) is coaxially fixedly connected to the bottom of the driving bevel gear (6); Second worm wheel (901), the second worm wheel (901) is coaxially fixedly connected to the outer side of the second drive nut (9), and the second worm (601) is engaged with the second worm wheel (901) to jointly constitute a worm and gear transmission mechanism.

5. The driving mechanism of the numerical control machining center according to claim 1, wherein the fixing assembly comprises: Lead screw support block (17), the lead screw support block (17) is fixedly connected to the upper end face of the crossbeam (1) on both sides; ​ ​ ​ ​ A screw rod pressing block (18) is fastened and connected on the top of the screw rod supporting block (17), a square hole is arranged in the middle of the contact surface between the screw rod supporting block (17) and the screw rod pressing block (18), the left and right ends of the first screw rod (2) are first square shafts (201), the first square shafts (201) are installed in the square hole, and the screw rod supporting block (17) and the screw rod pressing block (18) press the first square shafts (201) tightly; A screw rod baffle (19) is fastened and connected on the outer end surface of the screw rod supporting block (17) and the screw rod pressing block (18).

6. The numerical control machining center driving mechanism according to claim 1, wherein the locking assembly comprises: A left supporting seat (101) is fixedly connected to the left side of the front end surface of the cross beam (1); A left locking pressing plate (14) is locked by bolts on the left end surface of the left supporting seat (101); An angle adjusting end cover (13) is arranged with a square hole in the middle, the outer edge of the angle adjusting end cover (13) is a left friction disc (1301), the left locking pressing plate (14) presses the left friction disc (1301) tightly on the left side of the left supporting seat (101), the left side of the second screw rod (3) is rotationally connected with the left supporting seat (101), and the left and right end portions of the second screw rod (3) are second square shafts (301), and the left second square shaft (301) is inserted and matched in the square hole in the middle of the angle adjusting end cover (13).

7. The numerical control machining center driving mechanism according to claim 6, wherein the locking assembly further comprises: A right supporting seat (102) is fixedly connected to the right side of the front end surface of the cross beam (1), and the right side of the second screw rod (3) is rotationally connected with the right supporting seat (102); A right locking pressing plate (15) is fastened and locked by bolts on the right end surface of the left supporting seat (101); A right locking end cover (16) is arranged with a square hole in the middle, the right side of the right locking end cover (16) is a right friction disc (1601), the right locking pressing plate (15) presses the right friction disc (1601) tightly on the right side of the right supporting seat (102), and the right second square shaft (301) is inserted and connected with the square hole in the middle of the right locking end cover (16).

8. The numerical control machining center driving mechanism according to claim 6, wherein the angle adjusting assembly comprises: An angle adjusting bolt (10) is rotationally connected to the left front portion of the cross beam (1); An angle adjusting sliding block (11) is slidingly connected to the left front portion of the cross beam (1), and the angle adjusting bolt (10) and the angle adjusting sliding block (11) are threadedly connected to form a threaded transmission pair.

9. The numerical control machining center driving mechanism according to claim 8, wherein the angle adjusting assembly further comprises: ​ ​ ​ ​ An angle-adjusting connecting rod (12) is hingedly connected at one end to the front of an angle-adjusting slider (11) and at the other end to the front of an angle-adjusting end cover (13), and the angle-adjusting slider (11), the angle-adjusting connecting rod (12), the angle-adjusting end cover (13) and the cross beam (1) together form a crank slider transmission mechanism.

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