Adjustable feeding mechanism of CNC machine tool

Abstract

The present invention discloses an adjustable feeding mechanism of a CNC machine tool, which is provided with a feeding stacking frame, and can pre-stack metal plates of the same batch on the feeding stacking frame, and push the metal plates at the bottom one by one through an adaptive height pushing device at the bottom, so as to avoid fatigue and waste of manpower caused by long-term manual handling, and improve work efficiency; an inner frame structure for controlling its width and length is provided in the feeding stacking frame, and the inner dimensions of the feeding stacking frame are adjusted according to the specifications of the metal plates, and the conveying and storage of plates of various models are met through the adjustment of the three dimensions of length, width and height; the height synchronization structure ensures that the height of the output channel of the lifting feeding plate and the feeding opening are consistent and can be smoothly conveyed to the processing support surface of the CNC punching machine, so as to improve the work efficiency of the CNC punching machine; and the width limit control component, the length limit adjustment component and the pallet height control component are mutually adjusted and do not interfere with each other.

Description

Technical Field

[0001] The invention relates to the field of CNC punching machine production, and in particular to an adjustable feeding mechanism of a CNC machine tool. Background Art

[0002] CNC punching machines are mainly used for processing various types of metal sheet parts, and can automatically complete a variety of complex hole types and shallow drawing processing at one time. It can automatically process holes of different sizes and hole spacings according to requirements, and can also use small punching dies to punch large round holes, square holes, waist-shaped holes and various shapes of curved contours in a step-punching manner. In addition, CNC punching machines can also perform special processing, such as shutters, shallow drawing, countersunk holes, flanging holes, reinforcing ribs, embossing, etc.; when manually feeding, metal sheet parts are sharp and large in size, which can easily scratch the operator and waste a lot of manpower and material resources. Therefore, it is necessary to design an automatic feeding device that can continuously and automatically push metal sheets to the CNC punching machine for processing. At the same time, due to the different processing specifications of each batch, the thickness, length and width of the metal plate will also be different. Therefore, it is also necessary to design a mechanism that can adapt to various specifications and models of plates for automatic feeding.

[0003] Therefore, the existing CNC punching machines need to be further improved. Summary of the invention

[0004] The purpose of the present invention is to provide an adjustable feeding mechanism for a CNC machine tool, which can continuously and automatically push metal sheets to a CNC punch press for processing, and can adapt to push metal sheets of different models and sizes according to processing requirements.

[0005] In order to achieve the above object, the present invention adopts the following scheme:

[0006] A kind of adjustable feeding mechanism of CNC machine tool comprises a CNC punching machine, one side of the CNC punching machine is connected to a lifting feeding plate, and also comprises a feeding stacking frame, a width limit control component for controlling the width dimension of the feeding stacking frame is arranged in the feeding stacking frame, a length limit adjustment component for controlling the length dimension of the feeding stacking frame is arranged between the feeding stacking frame and the width limit control component, a front and rear position control component for controlling the front and rear movement of the length limit adjustment component is arranged on the feeding stacking frame, a feeding opening is arranged below the feeding stacking frame, a pallet height control component for controlling the height of the feeding opening is arranged in the feeding stacking frame, an adaptive height pushing device which can follow the height movement of the pallet height control component is arranged on the feeding stacking frame, and a height synchronization structure is arranged between the pallet height control component and the lifting feeding plate.

[0007] Furthermore, the lifting feeding plate includes a lifting base arranged on one side of the CNC punch press, a plurality of vertical telescopic support rods are arranged on the lifting base, an adjustable height feeding support plate is arranged between the upper ends of the plurality of vertical telescopic support rods, and the adjustable height feeding support plate is connected to the processing support table of the CNC punch press;

[0008] The material feeding and stacking frame comprises a material preparation base arranged on one side of the lifting base, a support frame is arranged on the material preparation base, and a material preparation frame is arranged on the support frame.

[0009] Furthermore, the width limit control component includes two symmetrical transverse guide grooves arranged on the front and rear surfaces of the preparation frame, a transverse slider is movably arranged in the transverse guide groove, a longitudinal limit vertical plate fixedly connected to the transverse slider is movably arranged in the preparation frame, a first push rod motor is arranged between the two transverse guide grooves, two first hinges are symmetrically arranged at the output end of the first push rod motor, a second hinge is arranged on the transverse slider, and a width control connecting rod is hinged between the first hinge and a corresponding one of the second hinges.

[0010] Furthermore, the length limit adjustment component includes a longitudinal groove arranged on the longitudinal limit vertical plate, a longitudinal slider is movably arranged in the longitudinal groove, a transverse limit plate is arranged on the inner side of the longitudinal slider, and the transverse limit plate is correspondingly arranged on the inner side of one of the longitudinal limit vertical plates.

[0011] Furthermore, the front-rear position control assembly includes a driving mechanism and a longitudinal position maintaining control assembly arranged on the material preparation frame, the driving mechanism is connected to the longitudinal position maintaining control assembly, and the longitudinal position maintaining control assembly is connected to the longitudinal slider.

[0012] Furthermore, the driving mechanism includes a second push rod motor arranged on the front surface of the material preparation frame, the output end of the second push rod motor is provided with a U-shaped driving frame, the U-shaped driving frame is extended and arranged on both side walls of the material preparation frame, and each side wall of the material preparation frame is provided with a vertical guide groove, and both ends of the U-shaped driving frame are respectively installed in the vertical guide grooves on both sides and can move up and down, a third hinge seat is provided at the outer end of the U-shaped driving frame, a longitudinal guide rail is provided above the vertical guide groove, a longitudinal push block is movably provided in the longitudinal guide rail, a fourth hinge seat is provided on the longitudinal push block, a length control connecting rod is hinged between the third hinge seat and a corresponding one of the fourth hinge seats, and the longitudinal push block is connected to the longitudinal position keeping control component.

[0013] Furthermore, the longitudinal position maintaining control component includes longitudinal guide grooves arranged on both sides of the material preparation frame, a driving telescopic rod is extended outward from the outer wall of the longitudinal slider, and the driving telescopic rod is movably inserted in the longitudinal guide groove, and a vertical driving rod is arranged on the side of the longitudinal push block close to the driving telescopic rod, and a vertical driving groove is arranged on the vertical driving rod, and the vertical driving rod is movably inserted in the vertical driving groove, and the left and right walls of the longitudinal slider are respectively provided with synchronous limit plates that are tightly attached to the two side walls of the longitudinal limit vertical plate.

[0014] Furthermore, the pallet height control assembly includes a rotary adjustment nut arranged on the material preparation base, a plurality of vertical guide sleeves are arranged around the material preparation frame, an adjustment vertical shaft is movably arranged in the vertical guide sleeve, an adjustment pallet is arranged between the lower ends of the plurality of adjustment vertical shafts, a screw rotating seat is arranged on the lower surface of the adjustment pallet, an adjustment screw is rotatably arranged in the screw rotating seat, and the adjustment screw is movably inserted into the rotary adjustment nut and is threadedly connected with the rotary adjustment nut;

[0015] The height synchronization structure comprises a support rod groove arranged at the bottom of the adjustable height feeding support plate, and a height support rod is arranged at the front end of the adjustment support plate, and the height support rod is installed in the support rod groove.

[0016] Furthermore, the adaptive height pushing device includes a feeding motor and a feeding track arranged on the material preparation base, a feeding rear push plate is movably arranged on the feeding track, the output end of the feeding motor is fixedly connected to the feeding rear push plate, a plurality of fixed sleeves are arranged on the adjusting support plate, a feeding push rod is movably arranged in the fixed sleeves, a feeding front push plate is arranged between the inner ends of the plurality of feeding push rods, the lower surface of the feeding front push plate is arranged tightly against the upper surface of the adjusting support plate, a synchronous vertical slider is arranged at the outer end of the feeding push rod, a plurality of synchronous vertical slots are arranged on the feeding rear push plate, and the synchronous vertical slider is movably installed in a corresponding one of the synchronous vertical slots.

[0017] Furthermore, width covering slots are provided on both sides of the adjustment support plate, and a width covering extension plate for extending to below the feeding opening is provided at the lower end of the longitudinal limiting vertical plate, and the width covering extension plate extends to a corresponding one of the width covering slots and moves left and right.

[0018] In summary, the present invention has the following beneficial effects compared with the prior art:

[0019] The present invention solves the shortcomings existing in the production of existing CNC punching machines. Through the structural setting of the present invention, it has the following advantages: a feeding stacking frame is provided, and metal plates of the same batch can be stacked on the feeding stacking frame in advance. The metal plates at the bottom are pushed one by one through the adaptive height pushing device at the bottom, so as to avoid fatigue and waste of manpower caused by long-term manual handling and improve work efficiency. An inner frame structure for controlling its width and length is provided in the feeding stacking frame. The inner size of the feeding stacking frame is adjusted according to the specifications of the metal plates to meet the storage and preparation of metal plates of more specifications. A pallet height control component capable of controlling the height of the feeding opening is provided at the bottom. The height of the feeding opening is controlled by the pallet height control component, and the height is consistent with the thickness of the metal part, ensuring that the metal plate at the bottom can be pushed every time. Through the adjustment of the three dimensions of length, width and height, it can meet the transportation and storage of various types of plates, and realize automatic loading of various types of plates. It has strong adaptability, meets various processing needs, and reduces the investment of manpower and material resources. At the same time, the height synchronization structure ensures that the height of the lifting feed plate output channel and the feeding opening is consistent and can be smoothly transported to the processing support surface of the CNC punching machine, thereby improving the working efficiency of the CNC punching machine, and the width limit control component, the length limit adjustment component and the pallet height control component are adjusted to each other without interfering with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the present invention;

[0021] Figure 2 A top view of the present invention;

[0022] Figure 3 One of the schematic diagrams of different metal plate sizes;

[0023] Figure 4 This is the second schematic diagram of different metal plate sizes;

[0024] Figure 5 This is the third schematic diagram of different metal plate sizes;

[0025] Figure 6 One of the three-dimensional diagrams of the present invention;

[0026] Figure 7 It is one of the cross-sectional views of the present invention;

[0027] Figure 8 This is the second cross-sectional view of the present invention;

[0028] Fig. 9 This is the second stereogram of the present invention;

[0029] Fig.10 Be the third of the three-dimensional diagram of the present invention. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-Figure 10 The present invention provides an adjustable feeding mechanism of a numerically controlled machine tool, comprising a numerically controlled punching machine 1, a lifting feeding plate 2 being connected to one side of the numerically controlled punching machine 1, and a feeding stacking frame 3, a width limit control component 4 for controlling the width dimension of the feeding stacking frame 3 being arranged in the feeding stacking frame 3, a length limit adjustment component 5 for controlling the length dimension of the feeding stacking frame 3 being arranged between the feeding stacking frame 3 and the width limit control component 4, a front and rear position control component 6 for controlling the front and rear movement of the length limit adjustment component 5 being arranged on the feeding stacking frame 3, a feeding opening 7 being arranged below the feeding stacking frame 3, a pallet height control component 8 for controlling the height of the feeding opening 7 being arranged in the feeding stacking frame 3, an adaptive height pushing device 9 capable of following the height movement of the pallet height control component 8 being arranged on the feeding stacking frame 3, and a height synchronization structure 10 being arranged between the pallet height control component 8 and the lifting feeding plate 2;

[0032] When working, according to different processing batches and different sizes of metal plates;

[0033] By adjusting the length and width of the feeding stacking frame 3 to be consistent with the length and width of the processed metal plate, the feeding stacking frame 3 can store metal plates of different lengths and widths, ensuring the stability of the metal plate when it is lowered and the positioning of the metal plate;

[0034] The width range in the feeding stacking frame 3 can be adjusted by the width limit control component 4; the length range in the feeding stacking frame 3 can be adjusted by the length limit adjustment component 5 to be consistent with the size of the processed metal parts;

[0035] The front and rear position control component 6 can adjust the length limit adjustment component 5;

[0036] The size of the feeding opening 7 can be controlled by the pallet height control assembly 8;

[0037] The distance between the pallet height control assembly 8 and the lower surface of the feeding stacking frame 3 is the feeding opening 7;

[0038] The height of the feeding opening 7 is adjusted according to the thickness of the metal plate, and the size of the feeding opening 7 is adjusted to be the same as the thickness of the metal plate;

[0039] The pallet height control assembly 8 can be moved up and down to adjust the distance from the lower surface of the feeding stacking frame 3;

[0040] A corresponding plurality of metal plates 1000 are stacked in the feeding stacking frame 3 for storage and material preparation;

[0041] After the adjustment is completed, the bottom metal plate 1000 is pushed forward to the lifting feeding plate 2 by the self-adaptive height pushing device 9. The lifting feeding plate 2 is connected to the working table of the CNC punch press 1. The metal plate 1000 can also be sent to the CNC punch press 1 through a coordinate fixture.

[0042] When the self-adaptive height pushing device 9 is reset, the stacked multiple metal plates 1000 are lowered by a thickness of the metal plate 1000 to the upper surface of the pallet height control assembly 8 to wait for the next feeding;

[0043] Since the height of the pallet height control assembly 8 changes due to the adjustment of the size of the feeding opening 7, in order to ensure the smoothness of the feeding of the self-adaptive height pushing device 9, at this time, the self-adaptive height pushing device 9 can always move in contact with the upper surface of the pallet height control assembly 8; and the height synchronization structure 10 can make the lifting feeding plate 2 always keep the upper surface of the pallet height control assembly 8 level;

[0044] The lifting feeding plate 2 of the present invention comprises a lifting base 201 arranged on one side of the CNC punch press 1, and a plurality of vertical telescopic support rods 202 are arranged on the lifting base 201, and an adjustable height feeding support plate 203 is arranged between the upper ends of the plurality of vertical telescopic support rods 202, and the adjustable height feeding support plate 203 is connected to the processing support table of the CNC punch press 1;

[0045] The feeding stacking frame 3 includes a material preparation base 301 arranged at one side of the lifting base 201 , a support frame 302 is arranged on the material preparation base 301 , and a material preparation frame 303 is arranged on the support frame 302 .

[0046] The width limit control assembly 4 of the present invention comprises two symmetrical transverse guide grooves 401 arranged on the front and rear surfaces of the stock preparation frame 303, a transverse slider 402 is movably arranged in the transverse guide groove 401, a longitudinal limit vertical plate 403 fixedly connected to the transverse slider 402 is movably arranged in the stock preparation frame 303, a first push rod motor 404 is arranged between the two transverse guide grooves 401, two first hinged parts 405 are symmetrically arranged at the output end of the first push rod motor 404, a second hinged part 406 is arranged on the transverse slider 402, and a width control connecting rod 407 is hinged between the first hinged part 405 and a corresponding one of the second hinged parts 406;

[0047] By controlling the extension and retraction of the first push rod motor 404, the control connecting rods 407 on both sides are pulled to make the transverse sliders 402 on both sides move closer to or open to each other, so that the distance between the two longitudinal limit vertical plates 403 becomes larger or smaller, thereby adapting to the width of the currently processed metal part 1000;

[0048] The length limit adjustment assembly 5 of the present invention comprises a longitudinal slot 501 arranged on the longitudinal limit vertical plate 403, a longitudinal slider 502 is movably arranged in the longitudinal slot 501, a transverse limit plate 503 is arranged inside the longitudinal slider 502, and the transverse limit plate 503 is correspondingly arranged inside one of the longitudinal limit vertical plates 403;

[0049] By controlling the front and rear positions of the two transverse limiting plates 503 on the longitudinal limiting vertical plate 403, the distance between the transverse limiting plates 503 and one side of the material preparation frame 303 is changed to adapt to the length of the currently processed metal part 1000;

[0050] Since the longitudinal limit plate 403 will change its left and right position, the transverse limit plate 503 will follow the longitudinal limit plate 403 to change its left and right position differently;

[0051] The front-rear position control assembly 6 of the present invention comprises a driving mechanism 601 and a longitudinal position holding control assembly 602 arranged on the material preparation frame 303, wherein the driving mechanism 601 is connected to the longitudinal position holding control assembly 602, and the longitudinal position holding control assembly 602 is connected to the longitudinal slider 502;

[0052] The driving mechanism 601 is used to control the activity of the longitudinal position holding control component 602; the longitudinal position holding control component 602 is used to control the transverse limit plates 503 at different left and right positions to adjust their front and rear positions;

[0053] The driving mechanism 601 of the present invention comprises a second push rod motor 6011 arranged on the front surface of the material preparation frame 303, the output end of the second push rod motor 6011 is provided with a U-shaped driving frame 6012, the U-shaped driving frame 6012 is extended to the two side walls of the material preparation frame 303, the two side walls of the material preparation frame 303 are respectively provided with a vertical guide groove 6013, the two ends of the U-shaped driving frame 6012 are respectively installed in the vertical guide grooves 6013 on both sides and can move up and down, the U-shaped A third hinge seat 6014 is provided at the outer end of the driving frame 6012, a longitudinal guide rail 6015 is provided above the vertical guide groove 6013, a longitudinal push block 6016 is movably provided in the longitudinal guide rail 6015, a fourth hinge seat 6017 is provided on the longitudinal push block 6016, a length control link 6018 is hinged between the third hinge seat 6014 and a corresponding fourth hinge seat 6017, and the longitudinal push block 6016 is connected to the longitudinal position holding control assembly 602;

[0054] By controlling the second push rod motor 6011 to move up and down, the third hinge seats 6014 on both sides are driven to move up and down. During the up and down movement of the third hinge seats 6014 on both sides, the longitudinal push block 6016 is pulled or pushed to move forward and backward, thereby driving the vertical driving rod 6023 to move forward and backward.

[0055] The longitudinal position holding control assembly 602 of the present invention comprises longitudinal guide grooves 6021 arranged on both sides of the material preparation frame 303, a driving telescopic rod 6022 is extended outwardly from the outer wall of the longitudinal slider 502, and the driving telescopic rod 6022 is movably inserted into the longitudinal guide groove 6021, a vertical driving rod 6023 is arranged on the side of the longitudinal push block 6016 close to the driving telescopic rod 6022, a vertical driving groove 6024 is arranged on the vertical driving rod 6023, and the vertical driving rod 6023 is movably inserted into the vertical driving groove 6024, and the left and right walls of the longitudinal slider 502 are respectively provided with synchronous limit plates 6025 close to the two side walls of the longitudinal limit vertical plate 403;

[0056] Since the transverse limit plate 503 will follow the longitudinal limit vertical plate 403 to change its left and right position, at this time, the length of the driving telescopic rod 6022 should be greater than its left and right range of movement;

[0057] When the vertical driving slot 6024 moves forward and backward, it will push the driving telescopic rod 6022 to move forward and backward synchronously without interfering with the left and right movement of the driving telescopic rod 6022, ensuring that the left and right movement and the front and back movement of the horizontal limiting plate 503 can be carried out independently.

[0058] The pallet height control assembly 8 of the present invention comprises a rotary adjustment nut 801 arranged on the material preparation base 301, a plurality of vertical guide sleeves 802 are arranged around the material preparation frame 303, an adjustment vertical shaft 803 is movably arranged in the vertical guide sleeve 802, an adjustment support plate 804 is arranged between the lower ends of the plurality of adjustment vertical shafts 803, a screw rotating seat 805 is arranged on the lower surface of the adjustment support plate 804, an adjustment screw 806 is rotatably arranged in the screw rotating seat 805, and the adjustment screw 806 is movably inserted into the rotary adjustment nut 801 and is threadedly connected with the rotary adjustment nut 801;

[0059] Since the thickness of the metal piece 1000 is different, in order to ensure that the metal piece 1000 at the bottom can be pushed out every time, at this time, the height position of the adjustment support plate 804 can be adjusted to a size consistent with the thickness of the metal piece 1000 to prevent the metal piece 1000 from being too small to be pushed out or the metal piece 1000 from being too large to be pushed out at one time;

[0060] The rotary adjustment nut 801 is rotated, and the rotary adjustment nut 801 cooperates with the adjustment screw 806 to drive the adjustment screw 806 to move up and down;

[0061] The height synchronization structure 10 includes a support rod groove 101 arranged at the bottom of the adjustable height feeding support plate 203 , and a height support rod 102 is arranged at the front end of the adjustment support plate 804 . The height support rod 102 is installed in the support rod groove 101 .

[0062] The self-adaptive height pushing device 9 of the present invention comprises a feeding motor 901 and a feeding track 902 arranged on the material preparation base 301, a feeding rear push plate 903 is movably arranged on the feeding track 902, an output end of the feeding motor 901 is fixedly connected to the feeding rear push plate 903, a plurality of fixed shaft sleeves 904 are arranged on the adjusting support plate 804, a feeding push rod 905 is movably arranged in the fixed shaft sleeve 904, a feeding front push plate 906 is arranged between the inner ends of the plurality of feeding push rods 905, the lower surface of the feeding front push plate 906 is arranged closely to the upper surface of the adjusting support plate 804, a synchronous vertical slider 907 is arranged at the outer end of the feeding push rod 905, a plurality of synchronous vertical slots 908 are arranged on the feeding rear push plate 903, and the synchronous vertical slider 907 is movably installed in a corresponding one of the synchronous vertical slots 908;

[0063] The feeding front push plate 906 can push the bottom metal piece 1000 forward;

[0064] A limit top plate covering the range of the feeding stacking frame is provided behind the upper surface of the feeding front push plate 906, and the purpose of providing the limit top plate is to prevent the feeding front push plate 906 from being blocked by the falling metal plate 1000 when it is reset;

[0065] Since the height of the adjusting support plate 804 will change, it is necessary to ensure that the front push plate 906 always moves close to the upper surface of the adjusting support plate 804 to prevent the bottom metal piece 1000 from being unable to be pushed out;

[0066] By the cooperation between the synchronous vertical slot 908 and the vertical slider 907 , the front push plate 906 for feeding can be ensured to always be in close contact with the adjustment support plate 804 while also being pushed forward.

[0067] The adjusting support plate 804 of the present invention is provided with width covering slots 100 on both sides, and the lower end of the longitudinal limit vertical plate 403 is provided with a width covering extension plate 200 for extending to the bottom of the feeding opening 7, and the width covering extension plate 200 extends to a corresponding one of the width covering slots 100 and moves left and right;

[0068] Since the height of the adjusting support plate 804 may change, the width covering extension plate 200 needs to be reserved. When the adjusting support plate 804 is lowered, the width dimension of the metal plate 1000 can still be limited by the width covering extension plate 200 .

[0069] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An adjustable feeding mechanism for a CNC machine tool, comprising a CNC punch press (1), characterized in that: The CNC punching machine (1) is connected to a lifting feeding plate (2) on one side, and also includes a feeding stacking frame (3). A width limit control component (4) for controlling the width dimension of the feeding stacking frame (3) is arranged in the feeding stacking frame (3). A length limit adjustment component (5) for controlling the length dimension of the feeding stacking frame (3) is arranged between the feeding stacking frame (3) and the width limit control component (4). A front and rear position control component (6) for controlling the front and rear movement of the length limit adjustment component (5) is arranged on the feeding stacking frame (3). A feeding opening (7) is arranged below the feeding stacking frame (3). A pallet height control component (8) for controlling the height of the feeding opening (7) is arranged in the feeding stacking frame (3). An adaptive height pushing device (9) capable of following the height movement of the pallet height control component (8) is arranged on the feeding stacking frame (3). A height synchronization structure (10) is arranged between the pallet height control component (8) and the lifting feeding plate (2).

2. The adjustable feeding mechanism of a CNC machine tool according to claim 1, characterized in that: The lifting feeding plate (2) comprises a lifting base (201) arranged on one side of the CNC punching machine (1), a plurality of vertical telescopic support rods (202) are arranged on the lifting base (201), an adjustable height feeding support plate (203) is arranged between the upper ends of the plurality of vertical telescopic support rods (202), and the adjustable height feeding support plate (203) is connected to the processing support table of the CNC punching machine (1); The material feeding stacking frame (3) comprises a material preparation base (301) arranged on one side of the lifting base (201), a support frame (302) is arranged on the material preparation base (301), and a material preparation frame (303) is arranged on the support frame (302).

3. The adjustable feeding mechanism of a CNC machine tool according to claim 2, characterized in that: The width limit control component (4) includes two symmetrical transverse guide grooves (401) arranged on the front and rear surfaces of the material preparation frame (303), a transverse slider (402) is movably arranged in the transverse guide groove (401), a longitudinal limit vertical plate (403) fixedly connected to the transverse slider (402) is movably arranged in the material preparation frame (303), a first push rod motor (404) is arranged between the two transverse guide grooves (401), two first hinges (405) are symmetrically arranged at the output end of the first push rod motor (404), a second hinge (406) is arranged on the transverse slider (402), and a width control connecting rod (407) is hinged between the first hinge (405) and a corresponding second hinge (406).

4. The adjustable feeding mechanism of a CNC machine tool according to claim 3, characterized in that: The length limit adjustment component (5) comprises a longitudinal slot (501) arranged on the longitudinal limit vertical plate (403), a longitudinal slider (502) is movably arranged in the longitudinal slot (501), a transverse limit plate (503) is arranged on the inner side of the longitudinal slider (502), and the transverse limit plate (503) is correspondingly arranged on the inner side of one of the longitudinal limit vertical plates (403).

5. The adjustable feeding mechanism of a CNC machine tool according to claim 4, characterized in that: The front-rear position control component (6) comprises a driving mechanism (601) and a longitudinal position holding control component (602) arranged on the material preparation frame (303), the driving mechanism (601) and the longitudinal position holding control component (602) are connected, and the longitudinal position holding control component (602) is connected to the longitudinal slider (502).

6. The adjustable feeding mechanism of a CNC machine tool according to claim 5, characterized in that: The driving mechanism (601) comprises a second push rod motor (6011) arranged on the front surface of the material preparation frame (303); a U-shaped driving frame (6012) is arranged at the output end of the second push rod motor (6011); the U-shaped driving frame (6012) is extended to the two side walls of the material preparation frame (303); the two side walls of the material preparation frame (303) are respectively provided with a vertical guide groove (6013); the two ends of the U-shaped driving frame (6012) are respectively installed in the vertical guide grooves (6013) on both sides and can move up and down; the U-shaped driving frame A third hinged seat (6014) is arranged at the outer end of the frame (6012), a longitudinal guide rail (6015) is arranged above the vertical guide groove (6013), a longitudinal push block (6016) is movably arranged in the longitudinal guide rail (6015), a fourth hinged seat (6017) is arranged on the longitudinal push block (6016), a length control link (6018) is hinged between the third hinged seat (6014) and a corresponding fourth hinged seat (6017), and the longitudinal push block (6016) is connected to the longitudinal position holding control component (602).

7. The adjustable feeding mechanism of a CNC machine tool according to claim 6, characterized in that: The longitudinal position holding control component (602) includes longitudinal guide grooves (6021) arranged on both sides of the material preparation frame (303); a driving telescopic rod (6022) is extended outward from the outer wall of the longitudinal slider (502); the driving telescopic rod (6022) is movably inserted into the longitudinal guide groove (6021); a vertical driving rod (6023) is arranged on the side of the longitudinal push block (6016) close to the driving telescopic rod (6022); a vertical driving groove (6024) is arranged on the vertical driving rod (6023); the vertical driving rod (6023) is movably inserted into the vertical driving groove (6024); and the left and right walls of the longitudinal slider (502) are respectively provided with synchronous limit plates (6025) that are closely attached to the two side walls of the longitudinal limit vertical plate (403).

8. The adjustable feeding mechanism of a CNC machine tool according to claim 7, characterized in that: The support plate height control component (8) comprises a rotary adjustment nut (801) arranged on the material preparation base (301), a plurality of vertical guide sleeves (802) are arranged around the material preparation frame (303), an adjustment vertical shaft (803) is movably arranged in the vertical guide sleeve (802), an adjustment support plate (804) is arranged between the lower ends of the plurality of adjustment vertical shafts (803), a screw rotating seat (805) is arranged on the lower surface of the adjustment support plate (804), an adjustment screw (806) is rotatably arranged in the screw rotating seat (805), and the adjustment screw (806) is movably inserted into the rotary adjustment nut (801) and is threadedly connected to the rotary adjustment nut (801); The height synchronization structure (10) comprises a support rod groove (101) arranged at the bottom of the adjustable height feeding support plate (203), and a height support rod (102) is arranged at the front end of the adjustment support plate (804), and the height support rod (102) is installed in the support rod groove (101).

9. The adjustable feeding mechanism of a CNC machine tool according to claim 8, characterized in that: The self-adaptive height pushing device (9) comprises a feeding motor (901) and a feeding track (902) arranged on the material preparation base (301); a feeding rear push plate (903) is movably arranged on the feeding track (902); an output end of the feeding motor (901) and the feeding rear push plate (903) are fixedly connected; a plurality of fixed shaft sleeves (904) are arranged on the adjusting support plate (804); a feeding push rod (903) is movably arranged in the fixed shaft sleeve (904); 05), a front feeding push plate (906) is arranged between the inner ends of the plurality of feeding push rods (905), the lower surface of the front feeding push plate (906) is arranged close to the upper surface of the adjusting support plate (804), a synchronous vertical slider (907) is arranged at the outer end of the feeding push rod (905), and a plurality of synchronous vertical slots (908) are arranged on the rear feeding push plate (903), and the synchronous vertical slider (907) is movably installed in a corresponding one of the synchronous vertical slots (908).

10. The adjustable feeding mechanism of a CNC machine tool according to claim 9, characterized in that: The adjusting support plate (804) is provided with width covering slots (100) on both sides, and the lower end of the longitudinal limiting vertical plate (403) is provided with a width covering extension plate (200) for extending to the bottom of the feeding opening (7), and the width covering extension plate (200) extends to a corresponding one of the width covering slots (100) and moves left and right.

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