CN113070414A

CN113070414A - Automatic steel wire straightening and cutting machine with safety and stability

Info

Publication number: CN113070414A
Application number: CN202110329746.7A
Authority: CN
Inventors: 郭怡; 冉书明; 权凤; 马小兵
Original assignee: Chongqing Water Resources and Electric Engineering College
Current assignee: Chongqing Water Resources and Electric Engineering College
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-07-06

Abstract

The invention discloses a safe and stable automatic steel wire straightening and cutting machine which comprises a rack main body, a rough bending straightening component, a built-in precision straightening component and a cutting device, wherein the rough bending straightening component is used for tightly bending a steel wire cable so as to enable the steel wire cable to be subjected to balanced bending deformation within a wave amplitude range; one side of the built-in precision straightening component, which is close to the rough bending straightening component, is provided with a guide wheel which can rotate relatively, the guide wheel and an inlet port of the built-in precision straightening component are in a horizontal state, and the guide wheel transversely conveys the steel wire cable into the built-in precision straightening component; the built-in precision straightening component performs high-precision straightening work on the steel wire cable through internal self-spinning action; the cutting device cuts the steel wire cable at a fixed point at a specified length; and driving rollers are symmetrically arranged at four corners of the lower end surface of the rack main body.

Description

Automatic steel wire straightening and cutting machine with safety and stability

Technical Field

The invention relates to the technical field of steel wire straightening equipment, in particular to a safe and stable automatic steel wire straightening and cutting machine.

Background

At present, a steel wire with high straightness cannot be effectively produced in the production process of the steel wire, the steel wire is easy to deform due to excessive thinness and overlength, the steel wire needs to be corrected for many times before being used, particularly for secondary or repeated use of a certain steel wire cable, the recovery and straightening processes are relatively complex due to the influence of bending deformation of the steel wire cable in the previous work, and the high straightness effect cannot be achieved. The existing straightening devices use roller clamping to straighten the steel wire and mostly depend on manual operation. Such a device has a poor straightening effect, requires low manual efficiency and high labor cost, and is not suitable for the modern industry of automatic production, so that a safe and stable automatic steel wire straightening and cutting machine is needed to solve the above problems.

Disclosure of Invention

In order to achieve the purpose, the invention provides the following technical scheme: a safe and stable automatic steel wire straightening and cutting machine comprises a rack main body, a rough bending straightening component, a built-in precision straightening component and a cutting device, wherein a plurality of mounting concave positions are formed in the upper end face of the rack main body, the rough bending straightening component, the built-in precision straightening component and the cutting device are sequentially arranged in the mounting concave positions, and the rough bending straightening component is used for tightly bending a steel wire cable so that the steel wire cable is subjected to balanced bending deformation in a wave amplitude range;

one side of the built-in precision straightening component, which is close to the rough bending straightening component, is provided with a guide wheel which can rotate relatively, the guide wheel and an inlet port of the built-in precision straightening component are in a horizontal state, and the guide wheel transversely conveys the steel wire cable into the built-in precision straightening component;

the built-in precision straightening component performs high-precision straightening work on the steel wire cable through internal self-spinning action;

the cutting device cuts the steel wire cable at a fixed point at a specified length;

and driving rollers are symmetrically arranged at four corners of the lower end surface of the rack main body.

As a preferred technical scheme of the invention, the rough bending correction assembly comprises a fixed base, a main guide wheel, a side guide wheel, a supporting shaft piece and a telescopic adjusting rod; a fixed base is fixed on the upper transverse line inside one side of the rack main body, and a main guide wheel is arranged in the middle of the lower end face of the fixed base in a relatively rotatable manner through a support rib;

supporting shaft pieces are symmetrically hinged to the left and right of the axis of the main guide wheel, and one end of each supporting shaft piece is rotatably provided with a side guide wheel, so that the steel wire cables are wound between the main guide wheel and the side guide wheels in an up-and-down staggered manner;

the two sides of the fixed base are symmetrically hinged with telescopic adjusting rods, the output ends of the telescopic adjusting rods are correspondingly hinged with the supporting shaft pieces, and the vertical distance between the side guide wheels and the main guide wheels is controlled by the up-down telescopic action of the telescopic adjusting rods, so that the steel wire cable is bent in a deformation range.

As a preferred technical scheme of the invention, the built-in precision straightening assembly comprises an external machine body, a transmission gear box, a transmission chain piece, a fixed lining, a straightening device and an end traction assembly; the straightening device comprises a rack main body, a straightening device and a straightening device, wherein an external machine body is fixed on the upper end face of the rack main body through a locking screw piece, a fixed lining is vertically embedded in the external machine body, and the straightening device is transversely limited and arranged in the external machine body through the fixed lining in a manner of relative rotation;

a transmission gear box is mounted on the lower end face of the outer machine body, is in meshed transmission with the transmission chain piece and drives the straightening device to perform directional circular rotation motion;

and an end traction assembly is further arranged on one side, far away from the straightening device, in the external machine body and used for transversely drawing and guiding out the straightened steel wire cable.

As a preferred technical scheme of the invention, the straightening device comprises a fixed end seat, an internal transmission branch pipe, an external gear ring, a main transmission gear, a straightening roller body and a transition straightening device; fixed end seats are transversely fixed on the outer machine body and the fixed lining in a penetrating manner, outer gear rings are embedded in the fixed end seats, and inner transmission branch pipes are coaxially and relatively rotatably arranged in the fixed end seats through bearings;

the inner transmission branch pipe transversely assists in guiding the steel wire wheel to pass in and out, and a main transmission gear is fixedly sleeved outside the inner transmission branch pipe;

a plurality of straightening roller bodies are arranged in the fixed end seat in a relatively rotatable manner, and are connected with and driven by the gear meshing action between the external rotary gear and the main transmission gear as well as between the external gear ring;

and transition adjusting devices are further connected among the corresponding straightening roller bodies and are used for straightening and transitioning the steel wire cables with different tensile strengths.

As a preferred technical solution of the present invention, the effective straightening outer diameter of the straightening roller body located at the side close to the fixed liner is larger than that of the straightening roller body located at the side far from the fixed liner.

As a preferred technical scheme of the invention, the transition correcting and adjusting device comprises an electric telescopic rod, a transmission support rod, a support guide frame, a straightening plate and an internal spring; an electric telescopic rod is transversely embedded and fixed on the straightening rolling shaft body which is positioned on one side far away from the fixed lining, and a plurality of transmission support rods are hinged to the circumference of the output end of the electric telescopic rod;

a straightening plate is hinged corresponding to the position limitation which can deflect relatively between the straightening roller bodies, and the inner wall of the cross section of the straightening plate is of an inclined plane structure;

a supporting guide frame is arranged between the transmission and connection supporting rods and is in abutting contact with the inner wall of the straightening plate through an auxiliary rotor;

and the straightening plate is also connected with an internal spring.

As a preferred technical solution of the present invention, the end traction assembly includes a main traction wheel, an outer clamp device, an inner rotating disk member, and a fixed body member, wherein; the external machine body is internally provided with main traction wheels which are vertically symmetrical and can relatively rotate, the upper circumference of each main traction wheel is provided with a plurality of built-in concave positions, and fixed body parts are respectively arranged in the built-in concave positions;

an external clamping device is arranged in the fixed body part;

and an inner rotating disc piece is coaxially arranged in the main traction wheel and can rotate relatively, and the inner rotating disc piece is connected with the outer clamping device through a connecting support rod for transmission.

As a preferred technical scheme of the invention, the external clamping device further comprises traction splints, side supporting rods and lifting supporting pieces, wherein the traction splints are symmetrically hinged in the fixed body piece, the lifting supporting pieces are vertically and relatively slidably arranged on the fixed body piece, and one ends of the lifting supporting pieces are hinged with the connecting supporting rods;

each traction clamping plate is connected with the lifting support piece through a side supporting rod for transmission.

Compared with the prior art, the invention provides a safe and stable automatic steel wire straightening and cutting machine, which has the following beneficial effects:

according to the invention, a rough bending correction component and a built-in precision straightening component are arranged on a rack main body, and the rough bending correction component is used for carrying out preliminary balanced bending deformation on steel wire cables with different bending deformation curvatures so that the steel wire cables are within a certain curvature amplitude range when entering the built-in precision straightening component, so that the later straightening working strength is reduced, the reset deformation is prevented, and a cutting device is further arranged on the rack main body and used for fixed-point cutting; in the method, the plurality of straightening roller bodies which rotate directionally carry out circumferential tangent plane resetting and correcting work, so that the jacking and correcting can be effectively carried out on each spatial bending point of the steel wire cable, and the correcting precision is high; still be provided with tip traction assembly in outside organism, transversely pull through tip traction assembly to carry out local clamp by its inside outer device of pressing from both sides and protect the steel wire cable, prevent that it from appearing the phenomenon of skidding in pulling, make the steel wire cable produce inside not hard up in the alignment, influence the alignment quality.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a rough bend leveling assembly according to the present invention;

FIG. 3 is a schematic structural diagram of a built-in precision alignment assembly according to the present invention;

FIG. 4 is a schematic view of the straightening apparatus according to the present invention;

FIG. 5 is a schematic structural diagram of a transition calibration device according to the present invention;

FIG. 6 is a schematic structural view of an end hitch assembly according to the present invention;

FIG. 7 is a schematic view of the external clamp apparatus of the present invention;

in the figure: 1 frame main body, 2 rough bending straightening components, 201 fixed base, 202 main guide wheel, 203 support shaft parts, 204 side guide wheel, 205 telescopic adjusting rod, 3 guide wheel, 4 built-in precision straightening components, 401 external machine body, 402 transmission gear box, 403 transmission chain parts, 5 cutting device, 6 straightening device, 601 fixed end seat, 602 internal transmission branch pipe, 603 external gear ring, 604 main transmission gear, 605 external rotary gear part, 606 straightening roller body, 7 fixed lining, 8 end traction component, 801 main traction wheel, 802 internal rotary disk part, 803 fixed body part, 804 external clamp device, 805 lifting support part, 806 traction clamping plate, 9 transition straightening device, 901 electric telescopic rod, 902 transmission connecting support rod, 903 support guide frame, 904 straightening plate part and 905 built-in spring.

Detailed Description

Referring to fig. 1, the present invention provides a technical solution: a safe and stable automatic steel wire straightening and cutting machine comprises a rack main body 1, a rough bending correction component 2, a built-in precision straightening component 4 and a cutting device 5, wherein the upper end face of the rack main body 1 is provided with a plurality of mounting concave positions, the rough bending correction component 2, the built-in precision straightening component 4 and the cutting device 5 are sequentially arranged in the mounting concave positions, the rough bending correction component 2 tightly bends a steel wire cable, so that the steel wire cable is subjected to balanced bending deformation in a wave amplitude range, bending points of the steel wire cable are uniformly distributed, the steel wire cable is in a specific curvature range value before entering the built-in precision straightening component, the built-in precision straightening component can conveniently perform high-precision straightening work on the steel wire cable, and the reset deformation is prevented;

one side, close to the rough bending straightening component, of the built-in precision straightening component 4 is provided with a guide wheel 3 in a relatively rotating manner, the guide wheel 3 and an incoming port of the built-in precision straightening component 4 are in a horizontal state, and a steel wire cable is transversely conveyed into the built-in precision straightening component 4 through the guide wheel 3;

the built-in precision straightening component 4 performs high-precision straightening work on the steel wire cable through internal self-spinning action;

the cutting device 5 cuts the steel wire cable at a fixed point at a specified length;

and driving rollers are symmetrically arranged at four corners of the lower end surface of the rack main body 1.

Referring to fig. 2, in the present embodiment, the rough bending straightening assembly 2 includes a fixed base 201, a main guide wheel 202, a side guide wheel 204, a supporting shaft member 203, and a telescopic adjusting rod 205; a fixed base 201 is fixed on the upper transverse line inside one side of the rack main body 1, and a main guide wheel 202 is arranged in the middle of the lower end face of the fixed base 201 and can rotate relatively through a support rib;

moreover, support shaft pieces 203 are symmetrically hinged to the left and right of the axle center of the main guide wheel 202, and side guide wheels 204 are rotatably arranged at one ends of the support shaft pieces 203, so that steel wire cables are vertically and alternately wound between the main guide wheel 202 and the side guide wheels 204;

the bilateral symmetry of unable adjustment base 201 articulates there is telescopic adjusting rod 205, telescopic adjusting rod 205's output and each support shaft piece 203 corresponds the hinge and establishes, and by telescopic adjusting rod 205's upper and lower telescopic action control side guide wheel 204 with the perpendicular interval between leading wheel 202 for the steel wire cable is tortuous at deformation range, and here, the steel wire cable to different bending resistance deformation intensity suitably adjusts the coarse correction straight curvature scope, prevents that it from appearing excessive deformation or fracture in the department of bending.

Referring to fig. 3, in the present embodiment, the built-in precision straightening assembly 4 includes an outer body 401, a transmission gear box 402, a transmission chain member 403, a fixed liner 7, a straightening device 6, and an end pulling assembly 8; an outer machine body 401 is fixed on the upper end face of the machine frame main body 1 through a locking screw, a fixed lining 7 is vertically embedded in the outer machine body 401, and the straightening device 6 is transversely limited and arranged in the outer machine body 401 through the fixed lining 7 in a relatively rotatable manner;

a transmission gear box 402 is mounted on the lower end surface of the outer machine body 401, the transmission gear box 402 is in meshing transmission with the transmission chain piece 402, and the transmission chain piece 403 drives the straightening device 6 to perform directional circular rotation motion; so as to bend and reset the steel wire cable from different directions;

an end traction assembly 8 is further arranged on one side, far away from the straightening device 6, of the outer machine body 401, and the end traction assembly 8 transversely pulls and guides out the straightened steel wire cable.

Referring to fig. 4, in the present embodiment, the straightening device 6 includes a fixed end seat 601, an internal transmission branch pipe 602, an external gear ring 603, a main transmission gear 604, a straightening roller body 606, and a transition straightening device 9; a fixed end seat 601 transversely penetrates through and is fixed on the outer machine body 401 and the fixed lining 7, an outer gear ring 603 is embedded in the fixed end seat 601, and an inner transmission branch pipe 602 is coaxially and relatively rotatably arranged in the fixed end seat 601 through a bearing;

the inner transmission branch pipe 602 transversely assists in guiding the wire reel to pass in and out, and a main transmission gear 604 is fixedly sleeved outside the inner transmission branch pipe 602;

a plurality of straightening roller bodies 606 are arranged in the fixed end seat 601 in a relatively rotatable manner, and the straightening roller bodies 606 are connected with and driven by the gear meshing action between the main transmission gear 604 and the external gear ring 604 through external rotating gear members 605;

transition adjusting devices 9 are further connected between the corresponding straightening roller bodies 606, and the transition adjusting devices 9 perform straightening transition on steel wire cables with different tensile strengths.

In this embodiment, the effective straightening outer diameter of straightening roller body 606 on the side near fixed liner 7 is greater than that of straightening roller body 606 on the side far from fixed liner 7.

Referring to fig. 5, in this embodiment, the transition calibrating device 9 includes an electric telescopic rod 901, a coupling rod 902, a supporting guide frame 930, a calibrating plate 904, and an internal spring 905; an electric telescopic rod 901 is transversely embedded and fixed on the straightening roller body 606 positioned on one side far away from the fixed lining 7, and a plurality of transmission supporting rods 902 are hinged to the circumference of the output end of the electric telescopic rod 901;

a straightening plate 904 is hinged corresponding to the limit between the straightening roller bodies 606, which can deflect relatively, and the inner wall of the cross section of the straightening plate 904 is of an inclined surface structure;

a support guide frame 903 is arranged between the transmission support rods 902, and the support guide frame 903 is in abutting contact with the inner wall of the straightening plate 904 through an auxiliary rotor;

an internal spring 905 is further connected to the straightening plate 904; specifically, for a steel wire cable with high bending deformation strength, the steel wire cable is relatively difficult to reset at a bending point, the electric telescopic rod drives the supporting guide frame to obliquely and outwards eject the straightening plate, so that the straightening plate is in a slope fixing state, and at the moment, the steel wire cable can be gradually bent and reset in the shuttling process to prevent the steel wire cable from deforming again in the later period; and to the lower steel wire cable of bending deformation intensity, it is whole to bend to reset relatively simply, is the horizontal cylindricality curved surface state with the alignment plate by electric telescopic handle drive support guide to form cascaded face that resets with alignment roller bearing looks adaptation, thereby improve alignment efficiency.

Referring to fig. 6, in this embodiment, the end traction assembly 8 includes a primary traction wheel 801, an outer clamp 804, an inner rotating disk 802, and a stationary torso 803, wherein; a main traction wheel 801 is symmetrically arranged in the outer machine body 401 up and down and can rotate relatively, a plurality of built-in concave positions are arranged on the circumference of the main traction wheel 801, and fixed body parts 803 are arranged in the built-in concave positions;

an external clamping device 804 is arranged in the fixed body member 803;

and, coaxial relatively pivoted is provided with interior rotation dish piece 802 in main traction wheel 801, interior rotation dish piece 802 through connecting branch with outer clamping device 804 is connected the transmission, and it should be noted that, this main traction wheel should keep unanimous with the circumference rotational speed of interior rotation dish piece for the outer clamping device that is located the steel wire cable contact point can be in the centre gripping state, and its adjacent point is and prepares opening and shutting and prepare the state of contracting, thereby realizes the centre gripping traction to the steel wire cable.

Referring to fig. 7, in this embodiment, the external clamp device 804 further includes a pulling splint 806, side branch rods, and a pulling brace 805, the pulling splint 806 is symmetrically hinged in the fixed trunk 803, the pulling brace 805 is vertically and relatively slidably disposed on the fixed trunk 803, and one end of the pulling brace 805 is hinged to the connecting rod;

each traction splint 803 is connected with the lifting support 805 through a side support rod for transmission.

Specifically, during the automatic straightening and cutting-off work of the steel wire cable, the steel wire cable is wound between the side guide wheel and the main guide wheel in a staggered manner, and the relative vertical transmission distance between the side guide wheel and the main guide wheel is properly regulated and controlled by the telescopic adjusting rod, so that the steel wire cable presents a certain curvature amplitude range before entering the built-in precision straightening assembly, each straightening device is driven by the transmission gear box to perform directional circular rotation motion around the cable, and the straightening roller body is matched with the transition straightening device to perform bending correction; the straightened steel wire cable is transversely pulled and guided out by utilizing the end part pulling assembly, and finally, the cut-off device can be adopted to cut off the steel wire cable at a fixed point in the specified length.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept within the technical scope of the present invention, and the technical solution and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The utility model provides an automatic straightening cutting machine of steel wire of safety and stability, its includes frame main part (1), thick straightening subassembly (2), built-in precision straightening subassembly (4) and cut device (5) of bending, wherein, a plurality of installation concave positions have been seted up to the up end of frame main part (1), thick straightening subassembly (2), built-in precision straightening subassembly (4) and cut device (5) of bending arrange in proper order and establish in the installation concave position, its characterized in that: the rough bending correction assembly (2) is used for tightly bending the steel wire cable, so that the steel wire cable is subjected to balanced bending deformation within the amplitude range;

one side, close to the rough bending straightening component, of the built-in precision straightening component (4) is provided with a guide wheel (3) in a relatively rotating mode, the guide wheel (3) and an incoming line port of the built-in precision straightening component (4) are in a horizontal state, and a steel wire cable is transversely conveyed into the built-in precision straightening component (4) through the guide wheel (3);

the built-in precision straightening component (4) performs high-precision straightening work on the steel wire cable through internal self-spinning action;

the cutting device (5) cuts the steel wire cable at a fixed point at a specified length;

and driving rollers are symmetrically arranged at four corners of the lower end surface of the rack main body (1).

2. The safe and stable automatic steel wire straightening and cutting machine according to claim 1, characterized in that: the rough bending correction assembly (2) comprises a fixed base (201), a main guide wheel (202), a side guide wheel (204), a support shaft piece (203) and a telescopic adjusting rod (205); a fixed base (201) is fixed on the upper transverse line inside one side of the rack main body (1), and a main guide wheel (202) is arranged in the middle of the lower end face of the fixed base (201) in a relatively rotatable manner through a support rib;

moreover, supporting shaft pieces (203) are symmetrically hinged to the axis of the main guide wheel (202) in the left-right direction, and side guide wheels (204) are rotatably arranged at one ends of the supporting shaft pieces (203), so that steel wire cables are vertically and alternately wound between the main guide wheel (202) and the side guide wheels (204);

the bilateral symmetry of unable adjustment base (201) articulates there is telescopic adjusting rod (205), the output and each of telescopic adjusting rod (205) support shaft spare (203) and correspond the hinge and establish, and by telescopic adjusting rod (205) about, telescopic action control side guide wheel (204) with perpendicular interval between leading wheel (202) makes the steel wire cable zigzag in deformation range.

3. The safe and stable automatic steel wire straightening and cutting machine according to claim 1, characterized in that: the built-in precision straightening assembly (4) comprises an external machine body (401), a transmission gear box (402), a transmission chain piece (403), a fixed lining (7), a straightening device (6) and an end traction assembly (8); the straightening device comprises a rack main body (1), an outer machine body (401) and a straightening device (6), wherein the upper end surface of the rack main body (1) is fixed with the outer machine body (401) through a locking screw, a fixed lining (7) is vertically embedded into the outer machine body (401), and the straightening device is transversely limited and arranged in the outer machine body (401) through the fixed lining (7) in a relatively rotatable manner;

a transmission gear box piece (402) is mounted on the lower end face of the outer machine body (401), the transmission gear box piece (402) is in meshed transmission with the transmission chain piece (402), and the transmission chain piece (403) drives the straightening device (6) to perform directional circular rotation motion;

an end traction assembly (8) is further arranged on one side, far away from the straightening device (6), of the outer machine body (401), and the end traction assembly (8) transversely pulls and guides out the straightened steel wire cable.

4. A safe and stable automatic straightening and cutting machine for steel wires according to claim 3, characterized in that: the straightening device (6) comprises a fixed end seat (601), an internal transmission branch pipe (602), an external gear ring (603), a main transmission gear (604), a straightening roller body (606) and a transition straightening device (9); a fixed end seat (601) transversely penetrates through and is fixed on the outer machine body (401) and the fixed lining (7), an outer gear ring (603) is embedded into the fixed end seat (601), and an inner transmission branch pipe (602) is coaxially and relatively rotatably arranged in the fixed end seat (601) through a bearing;

the inner transmission branch pipe (602) transversely assists in guiding the wire wheel to pass in and out, and a main transmission gear (604) is fixedly sleeved outside the inner transmission branch pipe (602);

a plurality of straightening roller bodies (606) are arranged in the fixed end seat (601) in a relatively rotatable manner, and the straightening roller bodies (606) are connected with the main transmission gear (604) and the outer gear ring (604) for transmission through a gear meshing function between an outer rotary gear (605);

transition adjusting devices (9) are further connected among the corresponding straightening roller bodies (606), and the transition adjusting devices (9) conduct straightening transition aiming at steel wire cables with different tensile strengths.

5. The safe and stable automatic steel wire straightening and cutting machine according to claim 4, characterized in that: the effective straightening outer diameter of the straightening roller body (606) on the side close to the fixed lining (7) is larger than that of the straightening roller body (606) on the side far away from the fixed lining (7).

6. The safe and stable automatic steel wire straightening and cutting machine according to claim 4, characterized in that: the transition adjusting device (9) comprises an electric telescopic rod (901), a transmission support rod (902), a support guide frame (930), an adjusting plate (904) and an internal spring (905); an electric telescopic rod (901) is transversely embedded and fixed on a straightening roller body (606) which is positioned on one side far away from the fixed lining (7), and a plurality of transmission supporting rods (902) are hinged to the circumference of the output end of the electric telescopic rod (901);

a straightening plate (904) is hinged corresponding to the limit of relative deflection between the straightening roller bodies (606), and the inner wall of the cross section of the straightening plate (904) is of an inclined surface structure;

a supporting guide frame (903) is arranged between the transmission support rods (902), and the supporting guide frame (903) is in abutting contact with the inner wall of the straightening plate (904) through an auxiliary rotor;

and an internal spring (905) is further connected to the straightening plate (904).

7. A safe and stable automatic straightening and cutting machine for steel wires according to claim 3, characterized in that: the end traction assembly (8) comprises a main traction wheel (801), an outer clamp arrangement (804), an inner rotating disc (802) and a stationary torso (803), wherein; a main traction wheel (801) is symmetrically arranged in the outer machine body (401) up and down and can rotate relatively, a plurality of built-in concave positions are arranged on the circumference of the main traction wheel (801), and fixed body parts (803) are arranged in the built-in concave positions;

an external clamping device (804) is arranged in the fixed body piece (803);

and an inner rotating disc piece (802) is coaxially arranged in the main traction wheel (801) and can rotate relatively, and the inner rotating disc piece (802) is connected with the outer clamping device (804) through a connecting support rod for transmission.

8. The safe and stable automatic steel wire straightening and cutting machine according to claim 7, characterized in that: the external clamping device (804) further comprises a traction clamping plate (806), a side branch rod and a lifting support piece (805), the traction clamping plate (806) is symmetrically hinged in the fixed body piece (803), the lifting support piece (805) is vertically and relatively slidably arranged on the fixed body piece (803), and one end of the lifting support piece (805) is hinged to the connecting support rod;

each traction splint (803) is connected with the lifting support piece (805) through a side support rod for transmission.