Workpiece feeding device of numerical control machine tool

Abstract

The invention relates to the field of numerical control machine tools, and discloses a numerical control machine tool workpiece feeding device which comprises a workpiece feeding frame, and the workpiece feeding frame is arranged on the front side of the middle of two numerical control machine tool bodies. A linkage arm connected with the rear side of the workpiece jacking table through a lifting sliding block synchronously moves upwards along with the workpiece jacking table, and air in an air cylinder is squeezed by a squeezing piston at the upper end of a linkage jacking rod moving upwards and then flows into an air guide pipe through an exhaust hole; a plurality of air nozzles below the rear side of the air guide pipe blow off burrs on the surface of the workpiece limiting table on one hand and blow off burrs, dust and other impurities on the surface of the machined workpiece sliding to the position close to the limiting table on the other hand in an oblique blowing mode; in this way, cleaning of burrs, dust and other impurities on the surfaces of the workpiece and the workpiece limiting table is achieved in a linkage mode while the machined workpiece is fed, the labor cost is reduced, and meanwhile the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of numerically controlled machine tools, and in particular to a workpiece feeding device for numerically controlled machine tools. Background Art

[0002] The CNC machine tool workpiece loading device is a device used to automatically or semi-automatically load the workpiece onto the machine tool workbench during the CNC machine tool processing process. This device can greatly improve production efficiency, reduce the labor intensity of workers, and ensure the stability of processing quality.

[0003] According to the Chinese authorized patent announcement number: CN111960034B, a cylindrical workpiece feeding device for a CNC machine tool is disclosed, including a machine tool body, a material storage box, a feeding track, a pushing mechanism, and a feeding device. The material storage box is provided with a storage trough and a discharge port, the material storage box is provided with a discharge mechanism, the pushing mechanism includes a pushing rack and a pushing cylinder, the machine tool body is provided with a driving mechanism, the feeding track is provided with an abutting wall, the feeding track is provided with a through opening, the discharge mechanism includes a discharge plate and a torsion spring, the discharge plate is provided with an abutting portion, the feeding track is provided with an abutting member, the material storage box is provided with a guide plate, the guide plate is provided with a direction-changing groove, the abutting member includes a plurality of hinged plates, the hinged plate is provided with an abutting plate and an abutting groove, the feeding track is provided with a knocking device, and the knocking device includes a knocking motor and a knocking member. By providing a material storage box, a feeding track, and a pushing mechanism, the feeding device can automatically and quickly feed the processing machine tool; by providing a knocking device, the workpiece is not easily stuck on the feeding track;

[0004] However, the above-mentioned workpiece feeding device still has some shortcomings. The above-mentioned feeding device lacks an effective burr and impurity cleaning mechanism. The workpiece may have burrs, dust and other impurities before processing. The processing personnel need to use an air gun or a rag to wipe off the burrs, dust and other impurities remaining on the surface of the loading position, which affects the processing efficiency. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a workpiece feeding device for CNC machine tools, which solves the problem that the feeding device lacks an effective burr and impurity cleaning mechanism. Before processing, the workpiece may have burrs, dust and other impurities. The processing personnel need to use an air gun or a rag to wipe off the burrs, dust and other impurities remaining on the surface of the loading position, affecting the processing efficiency.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a CNC machine tool workpiece feeding device, comprising a workpiece feeding rack, the workpiece feeding rack is arranged at the middle front side of two CNC machine tool bodies, and a workpiece feeding mechanism is arranged on the upper surface of the workpiece feeding rack, which is used to realize the linkage triggering of the cleaning of the burrs at the feeding position while the workpiece is automatically fed;

[0007] A multi-machine tool conveying mechanism is arranged at the rear side of the workpiece loading rack, which is used to realize the transfer of the loaded workpieces to two CNC machine tools.

[0008] Preferably, the workpiece feeding mechanism includes a fixed bracket, a workpiece guiding platform, a cylinder, a lifting slide block, a connecting plate, a workpiece lifting platform, a linkage arm, a linkage slide block, a linkage push rod, an air cylinder and an air guide tube. The lower end of the fixed bracket is fixedly connected to the upper surface of the workpiece feeding rack. The left and right ends of the front side of the fixed bracket are fixedly connected with inner slide rails. The front sides of the two inner slide rails are slidably connected with two lifting slide blocks. A connecting plate is fixedly connected between the left and right lifting slide blocks. The front side of the connecting plate is fixedly connected with the workpiece lifting platform. A cylinder is arranged on the lower surface of the workpiece lifting platform, and the free end of the cylinder is fixedly connected to the workpiece lifting platform. The fixed end of the cylinder is fixedly connected to the upper surface of the workpiece feeding rack.

[0009] Preferably, the front side of the craftsman lifting platform is arranged at the rear side of the workpiece placement box, and a plurality of processed workpieces are arranged inside the workpiece placement box. The rear ends of the workpiece placement box and the workpiece guide platform are both tilted downward.

[0010] Preferably, a linkage arm is fixedly connected to the outer side of the lifting slider, a linkage slider is fixedly connected to the inner side of one end of the linkage arm away from the lifting slider, the linkage slider is slidably connected to the outer side of the outer slide rail, and the outer slide rail is fixedly connected to the outer side of the fixed bracket.

[0011] Preferably, a linkage push rod is fixedly connected to the upper surface of the rear end of the linkage arm, the upper end of the linkage push rod is arranged through the inside of the air cylinder, and the upper end of the linkage push rod is fixedly connected to an extrusion piston.

[0012] Preferably, the upper end of the fixed bracket is fixedly connected to a workpiece guide platform, the left and right sides of the workpiece guide platform are fixedly connected to guard plates, the outer sides of the two guard plates are fixedly connected to air cylinders, an air guide pipe is arranged in the middle of the upper ends of the left and right air cylinders, exhaust holes are arranged at the connection positions of the two air cylinders and the air guide pipes, a plurality of air nozzles are obliquely arranged on the lower surface of the rear side of the air guide pipe, when the workpiece lifting platform moves up, the linkage arm connected to the rear side of the workpiece lifting platform through the lifting slider moves up synchronously, and after the linkage arm moves up, the linkage push rod on the upper surface of the rear end thereof is in the air The air in the air cylinder is squeezed by the squeezing piston at the upper end of the upward-moving linkage push rod, and then flows into the air guide pipe through the exhaust hole. Multiple air nozzles at the lower rear side of the air guide pipe blow obliquely to remove burrs on the surface of the workpiece limit platform on the one hand, and burrs, dust and other impurities on the surface of the workpiece that has slipped to the position close to the limit platform on the other hand. In this way, burrs, dust and other impurities on the surface of the workpiece and the workpiece limit platform can be cleaned while the workpiece is being processed and loaded, which reduces labor costs and improves production efficiency.

[0013] Preferably, a multi-machine tool conveying mechanism is provided on the rear side of the workpiece loading rack, and the multi-machine tool conveying mechanism includes a support angle frame, a transverse support arm, a transverse frame, a motor, a transmission gear, an engaging clamping gear, a connecting arm and an electric mechanical gripper. The support angle frame is fixedly connected to the rear side of the workpiece loading rack, and the upper end of the support angle frame is fixedly connected to the transverse support arm.

[0014] Preferably, the upper surface of the transverse support arm is slidably connected to a transverse frame, the lower surface of the transverse frame is rotatably connected to a transmission gear, a plurality of meshing teeth are provided on the front side of the transverse support arm, the transmission gear and the plurality of meshing teeth are meshed with each other, a motor is provided on the upper surface of the transverse frame, the output end of the motor is transmission-connected to the transmission gear, the upper end of the motor is fixedly connected to a connecting arm, and the front side of the upper end of the connecting arm is fixedly connected to an electric mechanical gripper.

[0015] Preferably, a workpiece limit platform is provided on the rear side of the workpiece guide platform, and the workpiece limit platform is fixedly connected to the rear side of the fixed bracket, a fitting ring is provided on one side of the workpiece limit platform, an electric push rod is provided on the outer side of the fitting ring, the free end of the electric push rod is fixedly connected to the fitting ring, the fixed end of the electric push rod passes through the support arm, and the electric push rod is fixedly connected to the support arm, and the lower end of the support arm is fixedly connected to the upper surface of the workpiece limit platform, and the motor drives the transmission gear to rotate. When the transmission gear rotates, the transmission gear engages with the meshing teeth on the front side of the transverse support arm, so that the transverse frame moves in a horizontal direction. After the horizontal movement, the transverse frame can be moved to the processing area of ​​the CNC machine tool body located on both sides of the workpiece loading rack, so as to facilitate the processing personnel to install the processed workpiece at the workpiece processing position of the CNC machine tool body, so that the workpiece can be flexibly transported to the processing areas of the CNC machine tool at both sides.

[0016] Preferably, a lead-out platform is provided on one side of the workpiece feeding mechanism, the front end of the lead-out platform is tilted downward, the lower end of the lead-out platform is fixedly connected to the upper surface of the workpiece feeding rack, and the front end of the lead-out platform is arranged above the rear side of the workpiece storage box.

[0017] Beneficial Effects

[0018] The present invention provides a workpiece feeding device for a CNC machine tool. Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, by setting up a workpiece feeding mechanism, during the process of loading workpieces of a CNC machine tool, the workpieces to be loaded are stacked in a workpiece placement box, and the workpiece lifting platform is driven up and down by a cylinder. During the process of the workpiece lifting platform moving up, the workpieces in the workpiece placement box are ejected to the front side of the workpiece guide platform, and slide along the workpiece guide platform to the workpiece limiting platform, and the workpiece is reciprocated. As the workpiece lifting platform repeatedly moves up, the corresponding workpiece slides into the workpiece limiting platform, thereby achieving the effect of automatic loading. In addition, when the workpiece lifting platform moves up, the rear side of the workpiece lifting platform is connected to the lifting slide block through a linkage The arm moves upward synchronously therewith. After the linkage arm moves upward, the linkage push rod on the upper surface of its rear end moves upward in the air cylinder. The air inside the air cylinder is squeezed by the squeezing piston at the upper end of the upwardly moving linkage push rod and then flows into the air guide pipe through the exhaust hole. Multiple air nozzles at the lower rear side of the air guide pipe blow obliquely to remove the burrs on the surface of the workpiece limit table. On the other hand, the burrs and dust and other impurities on the surface of the workpiece that slides to the position close to the limit table are blown away. In this way, the burrs and dust and other impurities on the surface of the workpiece and the workpiece limit table are cleaned while the workpiece is being processed and loaded, which reduces the labor cost and improves the production efficiency at the same time.

[0020] 2. In the present invention, by setting up a multi-machine tool conveying mechanism, when the processed workpiece slides into the groove of the workpiece limit table, the electric mechanical gripper grasps the processed workpiece in the workpiece limit table, and then the motor drives the transmission gear to rotate. While the transmission gear rotates, the transmission gear engages with the meshing teeth on the front side of the transverse support arm, so that the transverse frame moves in the horizontal direction. After the horizontal movement, the transverse frame can be moved to the processing area of ​​the CNC machine tool body on both sides of the workpiece loading rack, so that the processing personnel can install the processed workpiece at the workpiece processing position of the CNC machine tool body, so that the workpiece can be flexibly conveyed to the CNC machine tool processing area on both sides, which is suitable for production lines with collaborative operation of multiple machine tools, and improves the flexibility and adaptability of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a workpiece feeding device for a CNC machine tool proposed by the present invention;

[0022] Figure 2 This is a schematic diagram of the front structure of a workpiece loading rack in a workpiece loading device for a CNC machine tool proposed by the present invention;

[0023] Figure 3 This is a schematic diagram of the rear structure of a workpiece loading rack in a workpiece loading device for a CNC machine tool proposed by the present invention;

[0024] Figure 4 It is a structural schematic diagram of a multi-machine tool conveying mechanism in a CNC machine tool workpiece feeding device proposed by the present invention;

[0025] Figure 5 This is a schematic diagram of the front structure of a workpiece loading mechanism in a workpiece loading device for a CNC machine tool proposed by the present invention;

[0026] Figure 6 A schematic diagram of the rear structure of a workpiece loading mechanism in a workpiece loading device for a CNC machine tool proposed by the present invention;

[0027] Figure 7 This is a schematic cross-sectional structure diagram of an air cylinder in a workpiece feeding device for a CNC machine tool proposed by the present invention;

[0028] Figure 8 A workpiece feeding device for a CNC machine tool proposed by the present invention Figure 4 A is an enlarged view of the middle image.

[0029] Legend:

[0030] 1. Workpiece loading rack; 2. CNC machine tool body; 3. Workpiece loading mechanism; 301. Fixed bracket; 302. Workpiece guide platform; 303. Cylinder; 304. Lifting slide block; 305. Connecting plate; 306. Workpiece lifting platform; 307. Inner slide rail; 308. Outer slide rail; 309. Linkage arm; 310. Linkage slide block; 311. Linkage ejector rod; 312. Air cylinder; 313. Extrusion piston; 314. Air guide pipe; 315. Air nozzle; 316. Guard plate; 317. Exhaust hole; 4. Multi-machine tool conveying mechanism; 401. Support angle frame; 402. Transverse support arm; 403. Transverse frame; 404. Motor; 405. Transmission gear; 406. Engaging gear; 407. Connecting arm; 408. Electric mechanical gripper; 5. Workpiece placement box; 6. Processing workpiece; 7. Workpiece storage box; 8. Lead-out table; 9. Electric push rod; 10. Support arm; 11. Fitting ring; 12. Workpiece limit table. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 8 The present invention provides two technical solutions, which specifically include the following embodiments:

[0033] Embodiment 1:

[0034] A workpiece feeding device for a numerical control machine tool comprises a workpiece feeding rack 1, which is arranged at the front side between two numerical control machine tool bodies 2. A workpiece feeding mechanism 3 is arranged on the upper surface of the workpiece feeding rack 1, which is used to realize the cleaning of burrs at the feeding position by linkage triggering while the workpiece is automatically fed. The workpiece feeding mechanism 3 comprises a fixed bracket 301, a workpiece guide platform 302, a cylinder 303, a lifting slide block 304, a connecting plate 305, a workpiece lifting platform 306, a linkage arm 309, a linkage slide block 310, a linkage push rod 311, an air cylinder 312 and an air guide pipe 314. The lower end of the fixed frame is fixedly connected to the upper surface of the workpiece loading rack 1, and the left and right ends of the front side of the fixed frame are fixedly connected with inner slide rails 307, and the front sides of the two inner slide rails 307 are slidably connected with two lifting sliders 304, and a connecting plate 305 is fixedly connected between the left and right lifting sliders 304, and the front side of the connecting plate 305 is fixedly connected with a workpiece lifting platform 306, and a cylinder 303 is arranged on the lower surface of the workpiece lifting platform 306, and the free end of the cylinder 303 is fixedly connected to the workpiece lifting platform 306, and the fixed end of the cylinder 303 is fixedly connected to the upper surface of the workpiece loading rack 1, The front side of the lifting platform is arranged at the rear side of the workpiece placement box 5. There are a plurality of workpieces 6 for processing inside the workpiece placement box 5. The rear ends of the workpiece placement box 5 and the workpiece guide platform 302 are both tilted downward. A linkage arm 309 is fixedly connected to the outer side of the lifting slider 304. A linkage slider 310 is fixedly connected to the inner side of one end of the linkage arm 309 away from the lifting slider 304. The linkage slider 310 is slidably connected to the outer side of the outer slide rail 308. The outer slide rail 308 is fixedly connected to the outer side of the fixed bracket 301. A linkage push rod 311 is fixedly connected to the upper surface of the rear end of the linkage arm 309. The linkage push rod 311 The upper end of the fixed bracket 301 is arranged inside the air cylinder 312, and the upper end of the linkage push rod 311 is fixedly connected to the extrusion piston 313, the upper end of the fixed bracket 301 is fixedly connected to the workpiece guide platform 302, the left and right sides of the workpiece guide platform 302 are fixedly connected to the guard plates 316, the outer sides of the two guard plates 316 are fixedly connected to the air cylinder 312, the middle of the upper ends of the left and right air cylinders 312 is provided with an air guide pipe 314, the connection position of the two air cylinders 312 and the air guide pipe 314 is provided with an exhaust hole 317, and the lower surface of the rear side of the air guide pipe 314 is obliquely provided with a plurality of air nozzles 315.

[0035] During operation, in the process of loading the workpiece of the CNC machine tool, the workpiece 6 to be loaded is placed in the workpiece placement box 5, and the workpiece lifting platform 306 is driven up and down by the cylinder 303. In the process of the workpiece lifting platform 306 moving up, the workpiece 6 located in the workpiece placement box 5 is ejected to the front side of the workpiece guide platform 302, and slides along the workpiece guide platform 302 to the workpiece limiting platform 12, and reciprocates in this way. As the workpiece lifting platform 306 repeatedly moves up, the corresponding workpiece 6 slides into the workpiece limiting platform 12, thereby achieving the effect of automatic loading. In addition, when the workpiece lifting platform 306 moves up, the linkage arm 309 connected to the rear side of the workpiece lifting platform 306 through the lifting slider 304 moves synchronously. The linkage arm 309 moves upward. After the linkage arm 309 moves upward, the linkage push rod 311 on the upper surface of its rear end moves upward in the air cylinder 312. The air inside the air cylinder 312 is squeezed by the extrusion piston 313 on the upper end of the upward linkage push rod 311 and then flows into the air guide pipe 314 through the exhaust hole 317. The multiple air nozzles 315 at the lower rear side of the air guide pipe 314 blow obliquely to remove the burrs on the surface of the workpiece limit platform 12 on the one hand, and blow away the burrs and dust and other impurities on the surface of the processed workpiece 6 that has slipped to the position close to the limit platform on the other hand. In this way, the burrs and dust and other impurities on the surface of the workpiece and the workpiece limit platform 12 can be cleaned while the workpiece 6 is being processed and loaded, thereby reducing labor costs and improving production efficiency.

[0036] Embodiment 2:

[0037] On the basis of the first embodiment, a multi-machine tool conveying mechanism 4 is arranged on the rear side of the workpiece loading rack 1, and the multi-machine tool conveying mechanism 4 includes a support angle frame 401, a transverse support arm 402, a transverse frame 403, a motor 404, a transmission gear 405, an engaging tooth 406, a connecting arm 407 and an electric mechanical gripper 408. The specific model of the electric mechanical gripper 408 is EMG-1000XLR. The support angle frame 401 is fixedly connected to the rear side of the workpiece loading rack 1, and the upper end of the support angle frame 401 is fixedly connected to the transverse support arm 402, and the upper surface of the transverse support arm 402 is slidably connected to the transverse frame 403, and the lower surface of the transverse frame 403 is rotatably connected to the transmission gear 405, and the front side of the transverse support arm 402 is provided with a plurality of engaging teeth 406, and the transmission gear 405 is meshed with the plurality of engaging teeth 406. The upper surface of the transverse frame 403 is provided with a motor 404, and the output end of the motor 404 is transmission-connected to the transmission gear 405 Then, the upper end of the motor 404 is fixedly connected to a connecting arm 407, and the upper front side of the connecting arm 407 is fixedly connected to an electric mechanical gripper 408, a workpiece limiting platform 12 is arranged at the rear side of the workpiece guiding platform 302, and the workpiece limiting platform 12 is fixedly connected to the rear side of the fixed bracket 301, a fitting ring 11 is arranged on one side of the workpiece limiting platform 12, and an electric push rod 9 is arranged on the outer side of the fitting ring 11, and the free end of the electric push rod 9 is fixedly connected to the fitting ring 11, and the fixed end of the electric push rod 9 passes through the support arm 10, and the electric push rod 9 is fixedly connected to the support arm 10, and the fitting ring 11 can be moved close to the position of the workpiece limiting frame through the electric push rod 9, and the lower end of the support arm 10 is fixedly connected to the upper surface of the workpiece limiting platform 12, and a lead-out platform 8 is arranged on one side of the workpiece feeding mechanism 3, and the front end of the lead-out platform 8 is tilted downward, and the lower end of the lead-out platform 8 is fixedly connected to the upper surface of the workpiece feeding frame 1, and the front end of the lead-out platform 8 is arranged above the rear side of the workpiece storage box 7;

[0038] When the processed workpiece slides into the groove of the workpiece limit platform 12, the electric mechanical gripper 408 grasps the processed workpiece 6 in the workpiece limit platform 12, and then the motor 404 drives the transmission gear 405 to rotate. While the transmission gear 405 rotates, the transmission gear 405 engages with the meshing tooth 406 on the front side of the transverse support arm 402, so that the transverse frame 403 moves in the horizontal direction. After the horizontal movement, the transverse frame 403 can be moved to the processing area of ​​the CNC machine tool body 2 on both sides of the workpiece loading rack 1, so as to facilitate the processing personnel to install the processed workpiece 6 on the workpiece processing position of the CNC machine tool body 2, so that the workpiece can be flexibly transported to the CNC machine tool processing area on both sides, which is suitable for production lines with multiple machine tools working together, and improves the flexibility and adaptability of the production line.

[0039] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the application should be included in the scope of protection of the present application.

Claims

1. A workpiece feeding device for a numerically controlled machine tool, comprising a workpiece feeding frame (1), characterized in that: The workpiece loading rack (1) is arranged at the front side between the two CNC machine tool bodies (2); a workpiece loading mechanism (3) is arranged on the upper surface of the workpiece loading rack (1) for realizing the cleaning of burrs at the loading position while automatically loading the workpiece; A multi-machine tool conveying mechanism (4) is arranged at the rear side of the workpiece loading rack (1) for realizing the transfer of the loaded workpieces to two numerically controlled machine tools.

2. A workpiece feeding device for a CNC machine tool according to claim 1, characterized in that: The workpiece feeding mechanism (3) comprises a fixed bracket (301), a workpiece guide platform (302), a cylinder (303), a lifting slider (304), a connecting plate (305), a workpiece lifting platform (306), a linkage arm (309), a linkage slider (310), a linkage push rod (311), an air cylinder (312) and an air guide pipe (314); the lower end of the fixed bracket is fixedly connected to the upper surface of the workpiece feeding rack (1); the left and right ends of the front side of the fixed bracket are fixedly connected to inner slide rails (307); the two Two lifting slide blocks (304) are slidably connected to the front side of the inner slide rail (307); a connecting plate (305) is fixedly connected between the left and right lifting slide blocks (304); a workpiece lifting platform (306) is fixedly connected to the front side of the connecting plate (305); a cylinder (303) is provided on the lower surface of the workpiece lifting platform (306); and a free end of the cylinder (303) is fixedly connected to the workpiece lifting platform (306); and a fixed end of the cylinder (303) is fixedly connected to the upper surface of the workpiece loading rack (1).

3. A workpiece feeding device for a CNC machine tool according to claim 2, characterized in that: The front side of the craftsman lifting platform is arranged at the rear side of the workpiece placement box (5), and a plurality of processed workpieces (6) are arranged inside the workpiece placement box (5). The rear ends of the workpiece placement box (5) and the workpiece guide platform (302) are both tilted downward.

4. A workpiece feeding device for a CNC machine tool according to claim 2, characterized in that: A linkage arm (309) is fixedly connected to the outside of the lifting slider (304), a linkage slider (310) is fixedly connected to the inside of one end of the linkage arm (309) away from the lifting slider (304), the linkage slider (310) is slidably connected to the outside of the outer slide rail (308), and the outer slide rail (308) is fixedly connected to the outside of the fixed bracket (301).

5. A workpiece feeding device for a CNC machine tool according to claim 4, characterized in that: A linkage push rod (311) is fixedly connected to the upper surface of the rear end of the linkage arm (309), the upper end of the linkage push rod (311) is arranged to penetrate the interior of the air cylinder (312), and the upper end of the linkage push rod (311) is fixedly connected to an extrusion piston (313).

6. A workpiece feeding device for a CNC machine tool according to claim 2, characterized in that: The upper end of the fixed bracket (301) is fixedly connected to a workpiece guide platform (302), and the left and right sides of the workpiece guide platform (302) are fixedly connected to guard plates (316), and the outer sides of the two guard plates (316) are fixedly connected to air cylinders (312), and air guide pipes (314) are arranged in the middle of the upper ends of the left and right air cylinders (312), and exhaust holes (317) are opened at the connection positions of the two air cylinders (312) and the air guide pipes (314), and a plurality of air nozzles (315) are obliquely arranged on the lower surface of the rear side of the air guide pipe (314).

7. A workpiece feeding device for a CNC machine tool according to claim 1, characterized in that: A multi-machine tool conveying mechanism (4) is arranged at the rear side of the workpiece loading rack (1), and the multi-machine tool conveying mechanism (4) comprises a support angle frame (401), a transverse support arm (402), a transverse frame (403), a motor (404), a transmission gear (405), an engaging clamping tooth (406), a connecting arm (407) and an electric mechanical gripper (408); the support angle frame (401) is fixedly connected to the rear side of the workpiece loading rack (1), and the upper end of the support angle frame (401) is fixedly connected to the transverse support arm (402).

8. A workpiece feeding device for a CNC machine tool according to claim 7, characterized in that: The upper surface of the transverse support arm (402) is slidably connected to a transverse frame (403), and the lower surface of the transverse frame (403) is rotatably connected to a transmission gear (405). A plurality of meshing teeth (406) are arranged on the front side of the transverse support arm (402), and the transmission gear (405) meshes with the plurality of meshing teeth (406). A motor (404) is arranged on the upper surface of the transverse frame (403), and the output end of the motor (404) is transmission-connected to the transmission gear (405). The upper end of the motor (404) is fixedly connected to a connecting arm (407), and the front side of the upper end of the connecting arm (407) is fixedly connected to an electric mechanical gripper (408).

9. A workpiece feeding device for a CNC machine tool according to claim 2, characterized in that: A workpiece limiting platform (12) is arranged at the rear side of the workpiece guiding platform (302), and the workpiece limiting platform (12) is fixedly connected to the rear side of the fixed bracket (301); a fitting ring (11) is arranged on one side of the workpiece limiting platform (12), and an electric push rod (9) is arranged on the outer side of the fitting ring (11); the free end of the electric push rod (9) is fixedly connected to the fitting ring (11), the fixed end of the electric push rod (9) passes through the support arm (10), and the electric push rod (9) is fixedly connected to the support arm (10), and the lower end of the support arm (10) is fixedly connected to the upper surface of the workpiece limiting platform (12).

10. A workpiece feeding device for a CNC machine tool according to claim 1, characterized in that: A lead-out platform (8) is provided on one side of the workpiece feeding mechanism (3), the front end of the lead-out platform (8) is tilted downward, the lower end of the lead-out platform (8) is fixedly connected to the upper surface of the workpiece feeding frame (1), and the front end of the lead-out platform (8) is arranged above the rear side of the workpiece storage box (7).

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