Numerical control bending machine for workpiece machining

Abstract

The application relates to the technical field of workpiece machining, in particular to a numerical control bending machine for workpiece machining, which comprises a machine body, the machine body comprises a machine body, the inner side of the machine body is provided with a bending bin, the inner side of the bending bin is provided with a lower die seat, the inner side of the bending bin is movably connected with an upper die plate, the bottom end of the upper die plate is fixedly installed with a bending knife, the inner side of the bending bin is fixedly installed with a telescopic air cylinder, and the output end of the telescopic air cylinder is fixedly connected with a resisting plate. The bending bin is arranged, workpieces can be conveniently placed, the motor drives the reciprocating screw rod to rotate, the second moving block can drive the connecting block to move under the action of the reciprocating screw rod, the workpiece can be fed by the movement of the connecting block, the workpiece can be conveniently extended into the inner side of the bending bin and placed on the surface of the lower die seat, manual feeding is not needed during the machining process, the operation is more convenient and labor-saving, and the workpiece can be better bent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of workpiece processing, in particular to a numerical control bending machine for workpiece processing. BACKGROUND

[0002] Workpiece refers to the processing object in the machining process, which can be a single part or a combination of several parts fixed together. The processing methods of workpieces are various, including turning, milling, planing, grinding, casting, forging, etc. The processing procedures of workpieces also change with the processing methods. When processing workpieces, a numerical control bending machine is usually used to bend the workpieces quickly and consistently. The numerical control bending machine is a machine used for metal plate processing, which can accurately bend metal plates through computer control. It is a plate forming machine designed for cold rolling sheet metal processing, widely used in plate bending processing in industries such as automobile, aircraft manufacturing, light industry, shipbuilding, container, elevator, and railway vehicle. By using a numerical control bending machine to process workpieces, computer control can be achieved, highly accurate bending can be achieved, the accuracy of the size and geometric shape of the workpiece can be ensured, thereby improving product quality, providing high efficiency, diversity, and safety, and reducing human errors. It is of great significance for the processing of metal plate workpieces.

[0003] When a numerical control bending machine is used to bend workpieces, the workpiece is usually placed in the bending bin and placed on the lower die seat, then the upper die and die knife are pressed down, and the end of the workpiece far from the lower die seat is manually lifted up to achieve bending. In this process, the workpiece needs to be manually fed into the bending bin, and the workpiece needs to be supported throughout the process to fix the workpiece and perform subsequent bending. Manual operation is cumbersome, time-consuming and labor-intensive, and is prone to injury to the hands due to accidental touch, thereby reducing the safety of bending. Therefore, in order to solve the above problems, a numerical control bending machine for workpiece processing is proposed. SUMMARY

[0004] The present application aims to provide a numerical control bending machine for workpiece processing to solve the problem of manually feeding the workpiece into the bending bin and supporting the workpiece throughout the process to fix the workpiece and perform subsequent bending, which is cumbersome, time-consuming, labor-intensive, and prone to injury to the hands due to accidental touch, thereby reducing the safety of bending.

[0005] In order to achieve the above object, the present application provides the following technical scheme: a numerical control bending machine for workpiece machining, comprising a machine body, the machine body comprises a machine body, the inner side of the machine body is provided with a bending bin, the inner side of the bending bin is provided with a lower die seat, the inner side of the bending bin is movably connected with an upper die plate, the bottom end of the upper die plate is fixedly installed with a bending knife, the inner side of the bending bin is fixedly installed with a telescopic cylinder, and the output end of the telescopic cylinder is fixedly connected with a resisting plate.

[0006] The surface of the machine body is provided with a feeding mechanism, the feeding mechanism comprises a first movable slot, the first movable slot is opened in the inner side of the machine body, the inner wall of the first movable slot is fixedly connected with a fixed rod, the surface of the fixed rod is movably connected with a first moving block, the surface of the first moving block is fixedly connected with a supporting plate, the inner side of the supporting plate is provided with a second movable slot, the inner side of the second movable slot is movably connected with a reciprocating screw rod, the reciprocating screw rod moves in the inner side of the supporting plate, the inner side of the second movable slot is movably connected with a second moving block, the top end of the second moving block is fixedly connected with a connecting block, and the inner side of the connecting block is provided with a placing bin.

[0007] Preferably, the feeding mechanism further comprises a sliding groove, the sliding groove is opened in the inner wall of the first movable slot, one end of the first moving block away from the supporting plate is fixedly connected with a sliding block, the surface of the supporting plate is fixedly installed with a motor, the reciprocating screw rod and the output end of the motor are fixedly connected, and the surface of the reciprocating screw rod is movably connected with a first belt.

[0008] Preferably, the first movable slot is opened in the inner side of the machine body in two groups, the fixed rods are connected with the first movable slots in two groups, the first movable blocks are connected with the fixed rods in two groups, and the two groups of first movable blocks are fixedly connected with the supporting plate.

[0009] Preferably, one end of the sliding block is movably connected with the sliding groove, the other end of the sliding block is fixedly connected with the first moving block, and the two groups of first moving blocks are connected with the supporting plate in correspondence.

[0010] Preferably, the second movable slot is opened in the inner side of the supporting plate in two groups, the reciprocating screw rods are connected with the second movable slots in two groups, the second moving block is movably connected with the reciprocating screw rod through threads, and the two groups of reciprocating screw rods move at two ends of the first belt respectively.

[0011] Preferably, the inner side of the connecting block is provided with a fixing mechanism, the fixing mechanism comprises a first rack fixedly connected to the inner side of the supporting plate, the inner side of the connecting block is provided with a third movable slot, the inner side of the third movable slot movably connects a first rotating rod, the surface of the first rotating rod is fixedly connected with a first gear, the inner side of the connecting block movably connects a second rotating rod, the surface of the second rotating rod is fixedly connected with a second gear, the surface of the second rotating rod movably connects a second belt, the inner side of the connecting block is provided with a limiting slot, the surface of the limiting slot movably connects a limiting block, the end of the limiting block away from the limiting slot is fixedly connected with a second rack, the bottom end of the second rack is fixedly connected with a pressing plate, and the inner wall of the placing bin is fixedly connected with a rubber pad.

[0012] Preferably, the second gear is fixedly connected to the surface of the second rotating rod in two groups, one end of the second belt is movably connected with the first rotating rod, and the other end of the second belt is movably connected with the second rotating rod.

[0013] Preferably, the limiting slot is provided in the inner side of the connecting block in two groups, one end of the limiting block is movably connected with the limiting slot, the other end of the limiting block is fixedly connected with the second rack, and the two groups of second racks are movably connected with the pressing plate;

[0014] Preferably, the inner side of the first moving block is provided with a lifting mechanism, the lifting mechanism comprises a fixed block fixedly connected to the lower surface of the supporting plate, the inner side of the fixed block movably connects a worm, the worm moves in the inner side of the first moving block, the surface of the worm movably connects a third belt, the inner side of the first moving block movably connects a third gear, and the surface of the fixed rod is fixedly connected with a third rack.

[0015] Preferably, one end of the third belt is movably connected with the reciprocating lead screw, the other end of the third belt is movably connected with the worm, the third gear is movably connected with the first moving block through a rotating shaft, and the third rack moves in the inner side of the first moving block.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. By providing the placing bin, the workpiece can be placed, the second moving block can drive the connecting block to move under the action of the reciprocating lead screw driven by the motor, thereby realizing the feeding of the workpiece by the movement of the connecting block, facilitating the workpiece to be inserted into the inner side of the bending bin and placed on the surface of the lower die seat, so that manual feeding is not required during processing, operation is more convenient and labor-saving, and the workpiece can be better bent.

[0018] 2、When the connecting block is moving, the first gear will rotate under the action of the first rack, and drive the second rotating rod to rotate, so as to realize the vertical movement of the second gear rotating the second rack, and through the downward movement of the second rack, the lower movement of the pressing plate can be realized to press the workpiece in the placing bin, and then the fixation of the workpiece can be realized, so that the workpiece does not need to be manually supported during entering the bending bin and processing, the danger of manual support can be reduced, and the safety is better, and through the setting of the rubber pad, the friction between the inner wall of the placing bin and the workpiece can be increased, so that the workpiece can be fixed more stably on the inner side of the placing bin.

[0019] 3、When the reciprocating screw rod rotates, the third belt will move under the action of the reciprocating screw rod, and drive the worm to rotate, and then the third gear rotates under the action of the worm, and through the meshing action of the third gear and the third rack, the first moving block can move on the surface of the fixed rod, so as to realize the lifting of the supporting plate by the first moving block, and then during the process of the bending knife pressing the workpiece to bend, the connecting block is lifted by the supporting plate, so that the end of the workpiece away from the bending bin can be lifted, so that the workpiece can be better bent, and manual operation of the workpiece can be reduced, and the safety hazard can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure front view cross-sectional view schematic of the application;

[0021] Figure 2 It is a structure front view cross-sectional view schematic of the first moving block and the connecting block of the application;

[0022] Figure 3 It is a structure side view cross-sectional view schematic of the first moving block and the reciprocating screw rod of the application;

[0023] Figure 4 It is a structure side view cross-sectional view schematic of the first moving block and the first gear of the application;

[0024] Figure 5 It is a structure side view cross-sectional view schematic of the second gear and the second rack of the application;

[0025] Figure 6 It is a structure side view cross-sectional view schematic of the second gear and the second rack of the application; Figure 1

[0026] Figure 7 It is a structure side view cross-sectional view schematic of the second gear and the second rack of the application; Figure 2

[0027] Figure 8 It is a structure side view cross-sectional view schematic of the second gear and the second rack of the application; Figure 2

[0028] ​​​Figure 9 It is a schematic diagram of the structure of the second rack and the pressing plate of the application in the front view and section view.

[0029] Figure 10 It is a schematic diagram of the structure of the connecting block and the first belt of the application in the front view and section view.

[0030] In the figure: 1, body; 11, bending bin; 12, lower die seat; 13, upper die plate; 14, bending knife; 15, telescopic cylinder; 16, pressing plate; 2, first movable groove; 21, fixed rod; 22, sliding groove; 23, sliding block; 24, first moving block; 25, support plate; 26, second movable groove; 27, reciprocating screw rod; 28, motor; 29, second moving block; 210, connecting block; 211, placing bin; 212, first belt; 3, first rack; 31, third movable groove; 32, first rotating rod; 33, first gear; 34, second rotating rod; 35, second gear; 36, second belt; 37, limiting groove; 38, limiting block; 39, second rack; 310, pressing plate; 311, rubber pad; 4, fixed block; 41, worm; 42, third belt; 43, third gear; 44, third rack. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0032] Please refer to Figures 1-10 An embodiment provided by the application:

[0033] The telescopic cylinder 15 and the motor 28 used in the application are products that can be directly purchased on the market, and the principles and connection modes thereof are all prior art known to a person of ordinary skill in the art, so they will not be described here.

[0034] A numerical control bending machine for workpiece machining, comprising a machine body, the machine body comprising a body 1, the inner side of the body 1 is provided with a bending bin 11, the inner side of the bending bin 11 is provided with a lower die seat 12, the inner side of the bending bin 11 is movably connected with an upper die plate 13, the bottom end of the upper die plate 13 is fixedly installed with a bending knife 14, the inner side of the bending bin 11 is fixedly installed with a telescopic cylinder 15, the output end of the telescopic cylinder 15 is fixedly connected with a pressing plate 16, through the setting of the lower die seat 12, the bottom of the workpiece can be supported, through the extension of the telescopic cylinder 15 to drive the pressing plate 16 to move, the pressing plate 16 and the workpiece can be abutted, so that the workpiece is not easy to be skewed when placed, through the pressing of the upper die plate 13 and the bending knife 14, the workpiece can be bent.

[0035] The surface of the machine body 1 is provided with a feeding mechanism, the feeding mechanism comprises a first movable slot 2, the first movable slot 2 is opened in the inner side of the machine body 1, the inner wall of the first movable slot 2 is fixedly connected with a fixed rod 21, the surface of the fixed rod 21 is movably connected with a first moving block 24, the surface of the first moving block 24 is fixedly connected with a supporting plate 25, the inner side of the supporting plate 25 is opened with a second movable slot 26, the inner side of the second movable slot 26 is movably connected with a reciprocating screw rod 27, the reciprocating screw rod 27 moves in the inner side of the supporting plate 25, the inner side of the second movable slot 26 is movably connected with a second moving block 29, the top end of the second moving block 29 is fixedly connected with a connecting block 210, the inner side of the connecting block 210 is opened with a placing bin 211, through the setting of the placing bin 211, it is convenient to place the workpiece, through the rotation of the reciprocating screw rod 27, the second moving block 29 can drive the connecting block 210 to move, and then the workpiece can be fed into the inner side of the bending bin 11, so that manual feeding is not needed during processing.

[0036] Further, the feeding mechanism further comprises a sliding groove 22, the sliding groove 22 is opened in the inner wall of the first movable slot 2, one end of the first moving block 24 away from the supporting plate 25 is fixedly connected with a sliding block 23, the surface of the supporting plate 25 is fixedly installed with a motor 28, the output end of the reciprocating screw rod 27 and the motor 28 is fixedly connected, the surface of the reciprocating screw rod 27 is movably connected with a first belt 212, through the setting of the first belt 212, a group of reciprocating screw rods 27 can be moved when rotating, and another group of reciprocating screw rods 27 can be driven to rotate, and then two groups of reciprocating screw rods 27 can be rotated simultaneously, so that the movement of the connecting block 210 can be more stable.

[0037] Further, the first movable slot 2 is opened in the inner side of the machine body 1 in two groups, the fixed rod 21 is connected with the first movable slot 2 in two groups, the first moving block 24 is connected with the fixed rod 21 in two groups, the two groups of first moving blocks 24 are fixedly connected with the supporting plate 25, through the setting of the first moving block 24 and the supporting plate 25, the connecting block 210 can be supported, and then the workpiece can be placed in the inner side of the placing bin 211.

[0038] Further, one end of the sliding block 23 is movably connected with the sliding groove 22, the other end of the sliding block 23 is fixedly connected with the first moving block 24, the two groups of first moving blocks 24 are movably connected with the supporting plate 25, through the cooperation of the sliding groove 22 and the sliding block 23, the first moving block 24 can move more stably when moving, and then the stability of the workpiece processing can be guaranteed.

[0039] Further, the second movable slot 26 is arranged in two groups on the inner side of the support plate 25, the reciprocating wire rod 27 is arranged in two groups and is connected with the second movable slot 26, the second moving block 29 is movably connected with the reciprocating wire rod 27 through threads, and the two groups of reciprocating wire rods 27 are movably arranged at the two ends of the first belt 212. Through the arrangement of the second moving block 29, when the reciprocating wire rod 27 rotates, the second moving block 29 can drive the connecting block 210 to move under the action of the reciprocating wire rod 27, so as to facilitate the movement of the workpiece through the connecting block 210, and the workpiece enters the inner side of the bending bin 11 and the upper side of the lower die seat 12.

[0040] Further, the inner side of the connecting block 210 is provided with a fixing mechanism, the fixing mechanism comprises a first rack 3, the first rack 3 is fixedly connected to the inner side of the support plate 25, the inner side of the connecting block 210 is provided with a third movable slot 31, the inner side of the third movable slot 31 is movably connected with a first rotating rod 32, the surface of the first rotating rod 32 is fixedly connected with a first gear 33, the inner side of the connecting block 210 is movably connected with a second rotating rod 34, the surface of the second rotating rod 34 is fixedly connected with a second gear 35, the surface of the second rotating rod 34 is movably connected with a second belt 36, the inner side of the connecting block 210 is provided with a limiting slot 37, the surface of the limiting slot 37 is movably connected with a limiting block 38, one end of the limiting block 38 away from the limiting slot 37 is fixedly connected with a second rack 39, the bottom end of the second rack 39 is fixedly connected with a pressing plate 310, and the inner wall of the placing bin 211 is fixedly connected with a rubber pad 311. Through the arrangement of the rubber pad 311, the friction between the inner wall of the placing bin 211 and the surface of the workpiece can be increased, so that the workpiece is not easy to slip from the inner side of the placing bin 211, and the pressing plate 310 can also be more stable when fixing the workpiece.

[0041] Further, the second gear 35 is fixedly connected to the surface of the second rotating rod 34 in two groups, one end of the second belt 36 is movably connected with the first rotating rod 32, and the other end of the second belt 36 is movably connected with the second rotating rod 34. Through the arrangement of the second gear 35, when the second gear 35 rotates, the second rack 39 will be lifted and moved under the action of the second gear 35. The second rack 39 can drive the pressing plate 310 to move downward, so that the pressing plate 310 can press the workpiece tightly, thereby facilitating the fixation of the workpiece, and the workpiece can be fixed without manual support during processing, which can reduce the safety hazard.

[0042] Further, the limiting groove 37 is formed in two groups on the inner side of the connecting block 210, one end of the limiting block 38 is movably connected with the limiting groove 37, the other end of the limiting block 38 is fixedly connected with the second rack 39, two groups of the second rack 39 are correspondingly connected with the pressing plate 310, through the setting of the limiting groove 37 and the limiting block 38, the second rack 39 can be limited, the second rack 39 can be prevented from being deviated under the action of the second gear 35, and then the second rack 39 can stably move, so that the pressing plate 310 can stably move and press the workpiece;

[0043] Further, the inner side of the first moving block 24 is provided with a lifting mechanism, the lifting mechanism comprises a fixed block 4, the fixed block 4 is fixedly connected to the lower surface of the supporting plate 25, the inner side of the fixed block 4 is movably connected with a worm 41, the worm 41 moves in the inner side of the first moving block 24, the surface of the worm 41 is movably connected with a third belt 42, the inner side of the first moving block 24 is movably connected with a third gear 43, the surface of the fixed rod 21 is fixedly connected with a third rack 44, the worm 41 can drive the third gear 43 to rotate, and then the third gear 43 rotates and cooperates with the third rack 44, so that the first moving block 24 can drive the supporting plate 25 to ascend and descend, when the bending knife 14 bends the workpiece, the end of the workpiece away from the lower die seat 12 can be lifted, so that the bending purpose is achieved;

[0044] Further, one end of the third belt 42 is movably connected with the reciprocating lead screw 27, the other end of the third belt 42 is movably connected with the worm 41, the third gear 43 is movably connected with the first moving block 24 through a rotating shaft, the third rack 44 moves in the inner side of the first moving block 24, through the rotation of the third gear 43, the third gear 43 and the third rack 44 can mesh to make the first moving block 24 move vertically on the surface of the fixed rod 21, so that the position of the supporting plate 25 can be lifted and lowered.

[0045] Working principle: when in use, the workpiece is placed in the inner side of the placing bin 211, the motor 28 is electrically connected by an external power supply, the staff starts the motor 28 by pressing the switch, the motor 28 rotates to drive the corresponding reciprocating lead screw 27 to rotate, the first belt 212 moves under the action of the reciprocating lead screw 27, and drives the other group of reciprocating lead screws 27 to rotate, so that the two groups of reciprocating lead screws 27 rotate at the same time, the second moving block 29 moves in the inner side of the second movable groove 26 under the action of the reciprocating lead screw 27, and then the connecting block 210 drives the workpiece to move to the bending bin 11;

[0046] When the connecting block 210 moves, the first gear 33 will drive the first rotating rod 32 to rotate under the action of the first rack 3, and then the second belt 36 will move under the action of the first rotating rod 32, and drive the second rotating rod 34 to rotate, so that the second gear 35 rotates, the second rack 39 is limited by the limiting groove 37 and the limiting block 38, and moves vertically under the action of the second gear 35, so that the connecting block 210 moves while the pressing plate 310 descends to press the workpiece in the placing bin 211, and the workpiece is fixed.

[0047] When the reciprocating screw rod 27 rotates, the third belt 42 will move under the action of the reciprocating screw rod 27, and drive the worm 41 to rotate, the third gear 43 will rotate under the action of the worm 41, and through the cooperation of the third gear 43 and the third rack 44, the first moving block 24 will move on the surface of the fixed rod 21 under the action of the third gear 43, so that the first moving block 24 moves upward in the inside of the first movable groove 2, and then the connecting block 210 drives the workpiece to move into the bending bin 11, when the bending knife 14 presses down the workpiece, the first moving block 24 rises to drive the supporting plate 25 and the connecting block 210 to rise, so that the workpiece is lifted away from one end of the bending bin 11, and better bending is realized.

[0048] The above is only a preferred embodiment of the present application, and does not limit the present application in any form; any ordinary skilled person in the art can easily implement the present application according to the above and the drawings; however, any equivalent changes, modifications and evolution of the above disclosed technical content within the scope of the technical solutions of the present application are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present application are still within the protection scope of the technical solutions of the present application.

Claims

1. A CNC bending machine for workpiece processing, comprising a machine body, wherein the machine body comprises a machine body (1), a bending chamber (11) is provided on the inner side of the machine body (1), a lower die seat (12) is provided on the inner side of the bending chamber (11), an upper die plate (13) is movably connected to the inner side of the bending chamber (11), a bending knife (14) is fixedly installed at the bottom end of the upper die plate (13), a telescopic cylinder (15) is fixedly installed on the inner side of the bending chamber (11), and an output end of the telescopic cylinder (15) is fixedly connected to a stop plate (16); It is characterized by: The surface of the fuselage (1) is provided with a feeding mechanism, and the feeding mechanism comprises a first movable groove (2), the first movable groove (2) is opened on the inner side of the fuselage (1), the inner wall of the first movable groove (2) is fixedly connected with a fixed rod (21), the surface of the fixed rod (21) is movably connected with a first moving block (24), the surface of the first moving block (24) is fixedly connected with a support plate (25), the inner side of the support plate (25) is provided with a second movable groove (26), the inner side of the second movable groove (26) is movably connected with a reciprocating screw rod (27), the reciprocating screw rod (27) is movably connected to the inner side of the support plate (25), the inner side of the second movable groove (26) is movably connected with a second moving block (29), the top end of the second moving block (29) is fixedly connected with a connecting block (210), and the inner side of the connecting block (210) is provided with a placement bin (211); The feeding mechanism further comprises a slide groove (22), wherein the slide groove (22) is provided on the inner wall of the first movable groove (2), an end of the first movable block (24) away from the support plate (25) is fixedly connected to a slider (23), a motor (28) is fixedly mounted on the surface of the support plate (25), the reciprocating screw rod (27) is fixedly connected to the output end of the motor (28), and the surface of the reciprocating screw rod (27) is movably connected to a first belt (212); A fixing mechanism is provided on the inner side of the connecting block (210), and the fixing mechanism includes a first rack (3), the first rack (3) is fixedly connected to the inner side of the support plate (25), a third movable groove (31) is provided on the inner side of the connecting block (210), a first rotating rod (32) is movably connected to the inner side of the third movable groove (31), a first gear (33) is fixedly connected to the surface of the first rotating rod (32), a second rotating rod (34) is movably connected to the inner side of the connecting block (210), and the second rotating rod (34) is movably connected to the inner side of the connecting block (210). The surface of the connecting block (210) is fixedly connected to a second gear (35), the surface of the second rotating rod (34) is movably connected to a second belt (36), a limiting groove (37) is provided on the inner side of the connecting block (210), the surface of the limiting groove (37) is movably connected to a limiting block (38), the end of the limiting block (38) away from the limiting groove (37) is fixedly connected to a second rack (39), the bottom end of the second rack (39) is fixedly connected to a pressing plate (310), and the inner wall of the placement bin (211) is fixedly connected to a rubber pad (311); A lifting mechanism is provided on the inner side of the first moving block (24), and the lifting mechanism includes a fixed block (4), the fixed block (4) is fixedly connected to the lower surface of the support plate (25), the inner side of the fixed block (4) is movably connected to a worm (41), the worm (41) is movable on the inner side of the first moving block (24), the surface of the worm (41) is movably connected to a third belt (42), the inner side of the first moving block (24) is movably connected to a third gear (43), and the surface of the fixed rod (21) is fixedly connected to a third rack (44).

2. A CNC bending machine for workpiece processing according to claim 1, characterized in that: The first movable grooves (2) are formed into two groups and are opened on the inner side of the fuselage (1); the fixed rods (21) are formed into two groups and are connected to the first movable grooves (2) in correspondence; the first movable blocks (24) are formed into two groups and are connected to the fixed rods (21) in correspondence; and the two groups of the first movable blocks (24) are fixedly connected to the support plate (25).

3. A CNC bending machine for workpiece processing according to claim 2, characterized in that: One end of the slider (23) is movably connected to the slide groove (22), and the other end of the slider (23) is fixedly connected to the first moving block (24). Two groups of the first moving blocks (24) and the support plate (25) are correspondingly connected.

4. A CNC bending machine for workpiece processing according to claim 1, characterized in that: The second movable grooves (26) are formed into two groups and are opened on the inner side of the support plate (25); the reciprocating screw rods (27) are formed into two groups and are connected to the second movable grooves (26) in correspondence; the second moving block (29) is movably connected to the reciprocating screw rods (27) through a thread; the two groups of the reciprocating screw rods (27) are movably connected to the two ends of the first belt (212) respectively.

5. The CNC bending machine for workpiece processing according to claim 1, characterized in that: The second gears (35) are fixedly connected to the surface of the second rotating rod (34) in two groups, one end of the second belt (36) is movably connected to the first rotating rod (32), and the other end of the second belt (36) is movably connected to the second rotating rod (34).

6. A CNC bending machine for workpiece processing according to claim 5, characterized in that: The limiting grooves (37) are formed into two groups and are opened on the inner side of the connecting block (210). One end of the limiting block (38) is movably connected to the limiting groove (37), and the other end of the limiting block (38) is fixedly connected to the second rack (39). The two groups of the second rack (39) and the pressure plate (310) are correspondingly connected.

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