CN113145767B - A forming and bending process for designing a bending angle - Google Patents

Abstract

The invention discloses a forming and bending process for designing a bending angle, and relates to the technical field of bending machines. The invention includes the first step of calculating and determining the bending angle of the wire rod, and preparing the wire rod and the bending machine body required for construction. Step 2. Selection of the bending tool: according to the diameter of the wire, select the suitable bending tool, and one end of the bending tool is fixedly connected with a connecting plate. In the present invention, a positioning groove is arranged on one side of the bending tool, the positioning groove can bend the wire with the minimum bending radius, and is suitable for wire forming products with thin wire diameter and short length, thereby improving the applicability of the bending device , the set limiter, the limiter can replace the bending tool according to different wires, thereby improving the stability of the bending device, the set connector, the connector can be replaced according to different wires for different mandrels, This increases the variety of bending devices.

Description

A forming and bending process for designing a bending angle

technical field

The invention belongs to the technical field of bending machines, and in particular relates to a forming and bending process for designing a bending angle.

Background technique

The bending machine is a machine that can bend thin plates. Its structure mainly includes a bracket, a worktable and a clamping plate. The worktable is placed on the bracket. The worktable is composed of a base and a pressure plate. The base is composed of a seat shell, a coil and a cover plate, the coil is placed in a recess of the seat shell, and the top of the recess is covered with a cover plate. When in use, the coil is energized by the wire, and after the electricity is energized, the pressure plate is gravitationalized, so as to realize the clamping of the thin plate between the pressure plate and the base. Due to the use of electromagnetic force clamping, the pressing plate can be made into various workpiece requirements, and the workpiece with side walls can be processed, and the operation is also very simple.

Most of the existing bending machines may cause damage to the wire when bending the wire, and it is inconvenient to replace the tool when the wire is not suitable.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a forming and bending process for designing a bending angle, which solves the problems existing in the above-mentioned prior art by means of a bending tool and a limiter.

For reaching the above-mentioned purpose, the present invention is achieved through the following technical solutions:

A forming and bending process for designing a bending angle, including

Step 1. Calculate and determine the bending angle of the wire, and prepare the wire and the body of the bending machine required for construction;

Step 2. Selection of the bending tool: according to the diameter of the wire, select the suitable bending tool. One end of the bending tool is fixedly connected with the first connecting plate, and the bending tool is flat at the end close to the first connecting plate, and is connected The end of the plate away from the bending tool has an arc structure to reduce damage to the wire, and the bending tool and one side of the first connecting plate are provided with a positioning groove, and the positioning groove can be set according to the thickness of the wire ;

Step 3. The outer front end of the bending machine body is provided with a knife seat, and then the knife seat is replaced by a sliding member, so that the bending tool can be close to the wire;

Step 4: Install the bending tool, insert the bending tool into the tool holder, and then the tool holder uses the limiter to fix the bending tool;

Step 5, the installation of the mandrel, the inner side of the bending machine body is fixedly connected with the first motor, the output end of the first motor is fixedly connected with the mandrel through the connecting piece, and the mandrel is replaced according to the thickness of the wire;

Step 6. Bending of the wire: a material storage mechanism, a correction mechanism and a feeding mechanism are arranged inside the bending machine body, a cutting device is arranged on the upper side of the bending machine body, and the correction mechanism is located between the material storage mechanism and the feeding mechanism. ;

Optionally, the limiting member includes: a first groove in which the bending tool is slidably fitted, a first channel is opened on both sides of the tool seat, and a slide rail is fixedly connected to one side of the first channel The bottom of the first rod body is fixedly connected with a first rotating shaft, the peripheral side of the first rotating shaft is rotatably connected with a second rod body, and one end of the fixed rod is fixedly connected with a second rotating shaft;

One end of the second shaft is rotatably connected with the second rod body, one end of the second rod body is fixedly connected with the first gear, the lower side of the second rod body is fixedly connected with the first spring, and one end of the first spring is fixedly connected with the first channel. bottom.

Optionally, the upper side of the first channel is slidably fitted with a first toothed plate, and the first gear is engaged with the first toothed plate, and both sides of the bending tool are provided with clamping grooves adapted to the first toothed plate, The slide rail is a rectangular strip structure, one side of the slide rail is provided with a chute adapted to the first rod body, one side of the first groove is provided with a limit groove, and a third rod body is slidably connected in the limit groove;

One side of the limiting groove is provided with a first notch, the bottom of the first notch is fixedly connected with a second spring, one end of the second spring is fixedly connected with a fourth rod body, and one end of the fourth rod body is fixedly connected with the third rod body, The upper side of the third rod body is fixedly connected with a rectangular block, and the peripheral side of the third rod body is rotatably connected with a limiting plate.

Optionally, the connecting piece includes a second groove, the mandrel is slidably fitted in the middle of the second groove, a fixing plate is fixedly connected to one side of the body of the bending machine, the first motor is fixedly connected to the upper side of the fixing plate, and the first motor is fixedly connected to the upper side of the fixing plate. A motor output end is fixedly connected to a connecting plate, one side of the connecting plate is provided with two second slots and a second channel, the lower side of the mandrel is fixedly connected with a connecting rod, the connecting rod is slidably fitted in the second slot, the second One side of the channel is provided with a third slot;

A sliding rod is slidably fitted in the middle of the second channel, a second tooth plate is fixedly connected to one side of the sliding rod, a second gear is rotatably connected to one side of the third slot, and a third tooth is slidably fitted to the bottom of the second channel strip.

Optionally, one side of the sliding rod is fixedly connected with the first positioning rod, and one side of the second toothed plate is provided with a third groove adapted to the second toothed plate, and the second toothed plate is slidably fitted in the third groove. inside the road.

Optionally, the cutting device includes a second motor, the output end of the second motor is fixedly connected with a screw rod, one side of the bending machine body is fixedly connected with a baffle plate, one side of the baffle plate is provided with a second rectangular groove, and the second The positioning rod is slidably connected in the second rectangular groove, one side of the second positioning rod is provided with a thread groove adapted to the screw rod, and the other side of the positioning rod is provided with a blade.

Optionally, the second channel includes a first rectangular groove, and the sliding rod is slidably fitted inside the first rectangular groove, a second rectangular groove is formed on one side of the first rectangular groove, and a first rectangular groove is formed on one side of the second rectangular groove. Three rectangular grooves, and the third rack is slidably fitted inside the third rectangular groove.

Optionally, the second slot is communicated with the second channel, and the second gear is engaged with the third rack and the second tooth plate.

Optionally, the sliding member includes a guide rail that can be powered.

Optionally, one side of the limiting plate is provided with a first rectangular groove adapted to the rectangular block, and the limiting plate is of a U-shaped plate structure.

Embodiments of the present invention have the following beneficial effects:

In one embodiment of the present invention, a positioning groove is provided on one side of the bending tool. The positioning groove can bend the wire with the minimum bending radius, and is suitable for wire forming products with thin wire diameter and short length, thereby improving bending. The applicability of the device, the set limiter, the limiter can replace the bending tool according to different wires, thus improving the stability of the bending device, the set connector, the connector can be replaced according to different wires. mandrels, thus increasing the variety of bending devices.

Of course, it is not necessary for any product embodying the present invention to achieve all of the above-described advantages simultaneously.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic diagram of a three-dimensional structure of a bending machine body according to an embodiment of the present invention;

2 is a schematic three-dimensional structure diagram of a bending tool according to an embodiment of the present invention;

3 is a schematic cross-sectional structural diagram of a bending machine body according to an embodiment of the present invention;

4 is a schematic diagram of a cross-sectional structure of a tool holder according to an embodiment of the present invention;

Fig. 5 is a structural representation at A in Fig. 4;

Fig. 6 is the structural representation at B in Fig. 3;

FIG. 7 is a schematic diagram of the structure at C in FIG. 4 .

Wherein, the above-mentioned drawings include the following reference signs:

Bending machine body 1, bending tool 2, first connecting plate 3, positioning groove 4, tool seat 5, sliding member 6, limiting member 7, mandrel 8, first motor 9, connecting member 10, material storage mechanism 11. Correction mechanism 12, feeding mechanism 13, first groove 14, first channel 15, first rod body 16, fixing plate 17, slide rail 18, spring 19, second rod body 20, first shaft 21, second Rotating shaft 22, fixing rod 23, first tooth plate 24, first gear 25, third slot 26, cutting device 27, connecting plate 28, second slot 29, limit plate 30, second groove 31, sliding Rod 32, third rack 33, second gear 34, third channel 35, second tooth plate 36, first positioning rod 37, second motor 38, screw 39, second positioning rod 40, blade 41, block Plate 42 , limiting slot 43 , third rod body 44 , fourth rod body 45 , rectangular block 46 , second connecting plate 47 , second slot 48 , connecting rod 49 , first slot 50 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of well-known functions and well-known components.

Referring to Figures 1-7, this embodiment provides a forming and bending process for designing a bending angle, including:

Step 1. Calculate and determine the bending angle of the wire rod, and prepare the wire rod and the bending machine body 1 required for construction;

Step 2. Selection of the bending tool 2: Select the suitable bending tool 2 according to the diameter of the wire. One end of the bending tool 2 is fixedly connected with the first connecting plate 3, and the bending tool 2 is close to the first connecting plate 3. One end is flat, and the first connecting plate 3 has an arc structure at one end away from the bending tool 2 to reduce damage to the wire, and both the bending tool 2 and the first connecting plate 3 are provided with positioning The slot 4, and the positioning slot 4 can be set according to the thickness of the wire.

Step 3. Both sides of the sliding bending machine body 1 of the knife seat 5 are provided with the knife seat 5, and then the knife seat 5 can be replaced by the sliding member 6, so that the bending tool 2 can be close to the wire.

Step 4: The installation of the bending tool 2, the bending tool 2 is inserted into the tool holder 5, and then the tool holder 5 uses the limiter 7 to fix the bending tool 2;

Step 5. Installation of the mandrel 8. One side of the bending machine body 1 is fixedly connected with the first motor 9, and the output end of the first motor 9 is fixedly connected with the mandrel 8 through the connector 10. The mandrel 8 can be adjusted according to the wire rod. Change the mandrel 8 according to the thickness of the wire;

Step 6. Bending of the wire: a material storage mechanism 11, a correction mechanism 12, and a feeding mechanism 13 are arranged inside the bending machine body 1, and a cutting device 27 is arranged on the upper side of the bending machine body 1, and the correction mechanism 12 is located in the storage mechanism 12. between the feeding mechanism 11 and the feeding mechanism 13 .

One aspect of the application of this embodiment is: when a bending machine needs to be used, first according to 650xS ² xL/V=P (P=bending pressure, S=plate thickness, L=plate length, V=lower die notch ) Calculate the bending force of the bending machine, then use the suitable bending tool 2 according to the wire, then install the bending tool 2 into the body 1 of the bending machine, and then open the material storage mechanism 11, the correction mechanism 12 and the feeding mechanism 13 , the storage mechanism 11 feeds the wire into the correction mechanism 12, and then the correction mechanism 12 fixes the wire, and then the wire enters the peripheral side of the mandrel 8 through the feeding mechanism 13, and then the sliding member 6 is opened, so that the sliding member 6 passes through the knife The seat 5 drives the bending tool 2 to move to the side close to the mandrel 8, and then the wire is inserted into the positioning groove 4 of the connecting plate 3, and the sliding member 6 generates a force to bend the wire along the mandrel 8, and then the bending of the wire is completed. Afterwards, the cutting device 27 is turned on, and the cutting device 27 cuts off the bent wire, thereby completing the bending of the wire, and then the bending radius of the wire is determined by the distance between the end face of the mandrel 8 and the connecting plate 3, which also determines the wire. After the minimum bending length and the advancing distance s of the bending tool 2 are determined, the control precision that can be achieved for wire bending can be determined according to the minimum feed amount that the sliding member 10 can achieve. The value of l has a minimum value according to the wire diameter d, that is, l1≥d. When the value of l1 is determined, the minimum line segment length l that can be bent by the wire bending equipment of this design is also determined, that is, l≥l1+2; when the value of l is determined, the wire bending equipment of this design is also determined. Wire bending with small bending radii can be achieved, while the value of the minimum bending radius is r=d. It can be seen from the mathematical modeling and theoretical analysis of the wire bending process that the design of this wire bending equipment can realize wire bending with a small bending radius when the wire diameter is small and the bending length is short. It should be noted that the body of the bending machine involved in this application can be powered by a battery or an external power source.

By setting the positioning groove 4 on one side of the bending tool 2, the positioning groove 4 can bend the wire with the minimum bending radius, and is suitable for wire forming products with thin wire diameter and short length, thereby improving the application of the bending device. The limiter 7 is provided, and the limiter 7 can be used to replace the bending tool 2 according to different wires, thereby improving the stability of the bending device. The provided connector 10 can be used for different wires. By changing different mandrels 8, the versatility of the bending device is increased.

The limiting member 7 of this embodiment includes: a first groove 14 in which the bending tool 2 is slidably fitted; both sides of the tool seat 5 are provided with first grooves 15 , and the first grooves 15 One side is fixedly connected with the slide rail 18, the bottom of the first rod body 16 is fixedly connected with the first rotating shaft 21, the peripheral side of the first rotating shaft 21 is rotatably connected with the second rod body 20, and one end of the fixed rod 23 is fixedly connected with the second rotating shaft 22 ;

One end of the second shaft 22 is rotatably connected with the second rod body 20 , one end of the second rod body 20 is fixedly connected with the first gear 25 , the lower side of the second rod body 20 is fixedly connected with the first spring 19 , and one end of the first spring 19 is fixed Connected to the bottom of the first channel 15 .

In this embodiment, the upper side of the first channel 15 is slidably fitted with a first toothed plate 24 , and the first gear 25 is meshed with the first toothed plate 24 . Both sides of the bending tool 2 are provided with the first toothed plate 24 . The matching slot, the sliding rail 18 is a rectangular strip structure, one side of the sliding rail 18 is provided with a sliding groove that is adapted to the first rod body 16, and one side of the first channel 15 is provided with a limit slot 43, which is A third rod body 44 is slidably connected in the groove 43;

One side of the limiting groove 43 is provided with a first notch 50 , the bottom of the first notch 50 is fixedly connected with a second spring, one end of the second spring is fixedly connected with a fourth rod body 45 , and one end of the fourth rod body 45 is connected with the second spring. The three rod bodies 44 are fixedly connected, the upper side of the third rod body 44 is fixedly connected with a rectangular block 46 , and the peripheral side of the third rod body 44 is rotatably connected to the limiting plate 30 . When the limit plate 30 needs to be moved, the rectangular block 46 is first pulled, so that the third rod body 44 fixedly connected with the rectangular block 46 moves along the limit groove 43 to the side away from the limit plate 30, and then simultaneously the third rod body 44 squeezes Press the fourth rod body 45 to retract the fourth rod body 45 into the first slot 50, while the rectangular block 46 slides out from the second rectangular slot, and then rotate the limit plate 30. When the bending tool 2 needs to be installed , first put the bending tool 2 into the first groove 14, then pull out the first rod body 16, and then the slide rail 18 drives the first rod body 16 to slide out of the first groove 15 with less effort, and the first rod body 16 drives the first rod body 16. The second rod body 20 rotates on the fixed rod 23, and at the same time, the fixed rod 23 drives the first gear 25 to move toward the side close to the bottom of the first channel 15, and then the first gear 25 engages with the first toothed plate 24, so that the first toothed plate 24 is snapped into the bending tool 2.

The connector 10 of this embodiment includes a second groove 31 , the mandrel 8 is slidably fitted in the middle of the second groove 31 , the fixing plate 17 is fixedly connected to one side of the bending machine body 1 , and the first motor 9 is fixedly connected to the middle of the second groove 31 . On the upper side of the fixing plate 17 , the output end of the first motor 9 is fixedly connected to the second connecting plate 47 , one side of the second connecting plate 47 is provided with two second notches 48 and the second channel 29 , and the lower side of the mandrel 8 A connecting rod 49 is fixedly connected, the connecting rod 49 is slidably fitted in the second slot 48, and one side of the second slot 29 is provided with a third slot 26;

A sliding rod 32 is slidably fitted in the middle of the second channel 29 , a second toothed plate 36 is fixedly connected to one side of the sliding rod 32 , and a second gear 34 is rotatably connected to one side of the third slot 26 . The bottom is slidably fitted with a third rack 33 .

In this embodiment, a first positioning rod 37 is fixedly connected to one side of the sliding rod 32 , and a third groove 35 adapted to the second toothed plate 36 is opened on one side of the second toothed plate 36 . The second toothed plate 36 Sliding fit in the third channel 35 .

When the mandrel 8 needs to be fixed, firstly insert the mandrel 8 into the second groove 31, while the connecting rod 49 slides into the second groove 48, and then push the first positioning rod 37 to be fixed with the first positioning rod 37 The connected sliding rod 32 moves to the side close to the third rack 33, and at the same time the sliding rod 32 slides into the third groove 35, and then the second toothed plate 36 drives the second gear 34 to move, and at the same time the second gear 34 drives the first gear 34 to move. The third rack 33 moves, and then the third rack 33 moves toward the side close to the connecting rod 49 , so that the third rack 33 and the connecting rod 49 have a position-limiting relationship, thereby completing the fixation of the mandrel 8 .

The cutting device 27 in this embodiment includes a second motor 38 , the output end of the second motor 38 is fixedly connected with a screw 39 , a baffle plate 42 is fixedly connected to one side of the bending machine body 1 , and a second plate 42 is opened on one side of the baffle plate 42 . Two rectangular grooves, and the second positioning rod 40 is slidably connected in the second rectangular groove, one side of the second positioning rod 40 is provided with a threaded groove adapted to the screw 39, and the other side of the positioning rod 40 is provided with a blade 41 . When the cutting device 27 needs to be used, the second motor 38 is first turned on, so that the screw 39 fixedly connected to the output end of the second motor 38 rotates, and then the screw 39 drives the second positioning rod 40 to move along the baffle 42 to the side close to the wire. , and then the blade 41 cuts the bent wire to complete the cutting of the wire.

The second channel 29 in this embodiment includes a first rectangular groove, and the sliding rod 32 is slidably fitted inside the first rectangular groove. A second rectangular groove is opened on one side of the first rectangular groove, and the second tooth plate 36 slides Fitted inside the second rectangular slot, a third rectangular slot is defined on one side of the second rectangular slot, and the third rack 33 is slidably fitted inside the third rectangular slot.

In this embodiment, the second slot 48 communicates with the second channel 29 , and the second gear 34 meshes with the third rack 33 and the second tooth plate 36 .

The sliding member 6 in this embodiment includes a guide rail which can be electric.

One side of the limiting plate 30 of the present embodiment is provided with a first rectangular groove adapted to the rectangular block 46 , and the limiting plate 30 is a U-shaped plate structure.

The above-described embodiments may be combined with each other.

It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that data so used may be interchanged under appropriate circumstances so that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein.

In the description of the present invention, it should be understood that the orientations indicated by orientation words such as "front, rear, top, bottom, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. Or the positional relationship is usually based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and these orientation words do not indicate or imply the indicated device or element unless otherwise stated. It must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be construed as a limitation on the protection scope of the present invention; the orientation words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

Claims (8)

1. The utility model provides a shaping bending process of design bending angle which characterized in that includes:

step one, calculating and determining a bending angle required by a wire rod, and preparing the wire rod and a bending machine body (1) required by construction;

step two, selecting a bending cutter (2): the adaptive bending tool (2) is selected according to the diameter of the wire, one end of the bending tool (2) is fixedly connected with a first connecting plate (3), one end, close to the first connecting plate (3), of the bending tool (2) is flat, one end, far away from the bending tool (2), of the first connecting plate (3) is of an arc-shaped structure and used for reducing damage to the wire, positioning grooves (4) are formed in one sides of the bending tool (2) and the first connecting plate (3), and the positioning grooves (4) are arranged according to the thickness of the wire;

thirdly, tool holders (5) are arranged on two sides of the outer front end of the bending machine body (1) in a sliding mode, and then the tool holders (5) are replaced through sliding pieces (6), so that the bending tool (2) is close to the wire;

step four, mounting the bending cutter (2), namely inserting the bending cutter (2) into the cutter holder (5), and then fixing the bending cutter (2) by the cutter holder (5) through the limiting piece (7);

Fifthly, installing a mandrel (8), wherein a first motor (9) is fixedly connected to one side inside the bending machine body (1), the mandrel (8) is fixedly connected to the output end of the first motor (9) through a connecting piece (10), and the mandrel (8) is replaced according to the thickness of the wire;

step six, bending the wire: a material storage mechanism (11), a correcting mechanism (12) and a feeding mechanism (13) are arranged in a bending machine body (1), a cutting device (27) is arranged on the upper side of the bending machine body (1), the correcting mechanism (12) is located between the material storage mechanism (11) and the feeding mechanism (13), the material storage mechanism (11), the correcting mechanism (12) and the feeding mechanism are opened during bending, the material storage mechanism (11) sends the wire material into the correcting mechanism (12), then the correcting mechanism (12) fixes the wire material, then the wire material enters the peripheral side of a mandrel (8) through the feeding mechanism, then a sliding part (6) is opened, the sliding part (6) drives a bending cutter (2) to move towards one side close to the mandrel (8) through a cutter holder (5), then the wire material is inserted into a positioning groove (4) of a first connecting plate (3), and meanwhile the sliding part (6) generates force to bend the wire material along the mandrel (8), then, after the wire is bent, a cutting device (27) is started, and the cutting device (27) cuts off the bent wire, so that the wire is bent;

Wherein the stopper (7) comprises: the bending tool comprises a first groove (14), a bending tool (2) is in sliding fit in the first groove (14), first channels (15) are formed in two sides of a tool apron (5), a sliding rail (18) is fixedly connected to one side of each first channel (15), a first rod body (16) is arranged in each first channel (15), a first rotating shaft (21) is fixedly connected to the bottom of each first rod body (16), a second rod body (20) is rotatably connected to the peripheral side of each first rotating shaft (21), a fixing rod (23) is vertically arranged at the bottom of each first channel (15), and one end of each fixing rod (23) is fixedly connected with a second rotating shaft (22);

one end of the second rotating shaft (22) is rotatably connected with the second rod body (20), the upper end of the second rod body (20) is fixedly connected with a first gear (25), the lower side of the second rod body (20) is fixedly connected with a first spring (19), and one end of the first spring (19) is fixedly connected with the bottom of the first channel (15);

a first toothed plate (24) is in sliding fit with the upper side of the first channel (15), a first gear (25) is meshed with the first toothed plate (24), clamping grooves matched with the first toothed plate (24) are formed in the two sides of the bending cutter (2), the sliding rail (18) is of a rectangular bar structure, a sliding groove matched with the first rod body (16) is formed in one side of the sliding rail (18), a limiting groove (43) is formed in one side of the first channel (15), and a third rod body (44) is in sliding fit with the limiting groove (43);

One side of the limiting groove (43) is provided with a first notch (50), the bottom of the first notch (50) is fixedly connected with a second spring, one end of the second spring is fixedly connected with a fourth rod body (45), one end of the fourth rod body (45) is fixedly connected with the third rod body (44), the upper side of the third rod body (44) is fixedly connected with a rectangular block (46), the peripheral side of the third rod body (44) is rotatably connected with a limiting plate (30), one side of the limiting plate (30) is provided with a rectangular groove matched with the rectangular block (46), when the limiting plate (30) needs to be moved, the rectangular block (46) is pulled firstly, so that the third rod body (44) fixedly connected with the rectangular block (46) moves towards one side far away from the limiting plate (30) along the limiting groove (43), then the fourth rod body (45) is extruded by the third rod body (44), the fourth rod body (45) is retracted into the first notch (50), simultaneously rectangular block (46) follow the rectangular channel roll-off, then rotate limiting plate (30) can, when needs installation bending tool (2), put into first recess (14) bending tool (2) earlier, then pull out first body of rod (16), then slide rail (18) drive the first channel of roll-off (15) that first body of rod (16) is more laborsaving, first body of rod (16) drive the second body of rod (20) and rotate on dead lever (23), dead lever (23) drive first gear (25) simultaneously and remove to the one side that is close first channel (15) bottom, then make first gear (25) mesh first pinion rack (24), make first pinion rack (24) card go into in bending tool (2).

2. The forming and bending process for designing the bending angle according to claim 1, wherein the connecting piece (10) comprises a second groove (31), the mandrel (8) is in sliding fit with the middle of the second groove (31), one side of the interior of the bending machine body (1) is fixedly connected with a fixing plate (17), the first motor (9) is fixedly connected with the upper side of the fixing plate (17), the output end of the first motor (9) is fixedly connected with a second connecting plate (47), one side of the second connecting plate (47) is provided with two second notches (48) and a second channel (29), one side of the mandrel (8) is fixedly connected with a connecting rod (49), the connecting rod (49) is in sliding fit with the second notch (48), and one side of the second channel (29) is provided with a third notch (26);

a sliding rod (32) is in sliding fit with the middle of the second channel (29), a second toothed plate (36) is fixedly connected to one side of the sliding rod (32), a second gear (34) is rotatably connected to one side of the third notch (26), and a third rack (33) is in sliding fit with the bottom of the second channel (29).

3. The forming and bending process for designing the bending angle according to claim 2, wherein a first positioning rod (37) is fixedly connected to the other side of the sliding rod (32), a third groove channel (35) matched with the second tooth plate (36) is formed in one side of the second tooth plate (36), and the second tooth plate (36) is in sliding fit in the third groove channel (35).

4. The forming and bending process for designing the bending angle according to claim 1, wherein the cutting device (27) comprises a second motor (38), a screw (39) is fixedly connected to an output end of the second motor (38), a baffle (42) is fixedly connected to one side of the bending machine body (1), a rectangular groove is formed in one side of the baffle (42), a second positioning rod (40) is slidably connected in the rectangular groove, a threaded groove matched with the screw (39) is formed in one side of the second positioning rod (40), and a blade (41) is arranged on the other side of the second positioning rod (40).

5. The forming and bending process for designing a bending angle according to claim 2, wherein the second channel (29) comprises a first rectangular groove, the slide rod (32) is slidably fitted in the first rectangular groove, a second rectangular groove is formed in one side of the first rectangular groove, a third rectangular groove is formed in one side of the second rectangular groove, and the third rack (33) is slidably fitted in the third rectangular groove.

6. The forming and bending process for designing a bending angle according to claim 2, wherein the second notch (48) communicates with the second channel (29), and the second gear (34) is engaged with the third rack (33) and the second toothed plate (36).

7. A form-bending process for designing a bending angle according to claim 1, wherein the slide (6) is a motorized guide rail.

8. The forming and bending process for designing a bending angle as claimed in claim 1, wherein the limiting plate (30) is a U-shaped plate structure.

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