A cutting mechanism and a numerically controlled straight wire machine using the same

Abstract

The present invention relates to the technical field of straightening and cutting of metal wires, and mentions a cutting mechanism and a CNC straight wire machine using the mechanism, which are used to cut the metal wire, and include a frame, a reciprocating member, which reciprocates on the frame, a mobile frame, which is arranged on the frame and moves along the axial direction of the metal wire, and has a stopper, which is used to drive the mobile frame to move when the free end of the metal wire acts on the stopper, a guide member, which is arranged on the mobile frame at one end away from the stopper, and has a guide hole, which is used for the metal wire to pass through, a cutting knife, which is slidably arranged on the guide member and approaches or moves away from the metal wire after sliding, and the cutting knife is located on one side of the guide hole. When the cutting knife moves with the mobile frame to below the reciprocating member, the reciprocating member acts on the cutting knife to cut the metal wire after moving. Through the above technical scheme, the problem of low automation in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of metal wire straightening, and in particular to a cutting mechanism and a numerically controlled wire straightening machine using the mechanism. Background Art

[0002] The metal wire in the prior art needs to be straightened and cut by two mechanisms, a straightening mechanism and a cutting mechanism. The cutting mechanism can only cut the metal wire, and the cut length of the metal wire needs to be determined manually. The straightening structure can only straighten but not cut. Therefore, there is no complete mechanism for cutting and straightening the metal wire simultaneously. At the same time, the prior art manually determines the length of the metal wire when cutting, and cannot be fully automated. Summary of the invention

[0003] The invention provides a cutting mechanism and a numerically controlled straight wire machine using the mechanism, which solves the problem of low automation in the related art.

[0004] The technical solution of the present invention is as follows:

[0005] A cutting mechanism for cutting a metal wire, comprising:

[0006] frame,

[0007] A reciprocating member reciprocates on the frame,

[0008] The movable frame is arranged on the frame for axial movement along the metal wire and has a stopper, which is used to drive the movable frame to move when the free end of the metal wire acts on the stopper.

[0009] A guide member is arranged on the end of the movable frame away from the stopper and has a guide hole for the metal wire to pass through.

[0010] A cutting knife is slidably arranged on the guide member and moves closer to or away from the metal wire after sliding. The cutting knife is located on one side of the guide hole. When the cutting knife moves with the movable frame to be located below the reciprocating moving member, the reciprocating moving member moves and acts on the cutting knife to cut the metal wire.

[0011] As a further technical solution, one end of the reciprocating member acting on the cutting knife is stepped.

[0012] As a further technical solution, one of the second limiting portion and the second stop portion is arranged on the frame and the other is arranged on the moving frame, and is used to limit the moving frame from moving to a position close to the reciprocating moving member.

[0013] The second elastic member is used to provide a force for the moving frame to approach the reciprocating moving member.

[0014] The sensor is a proximity switch, and is used for counting when the mobile rack approaches the sensor.

[0015] As a further technical solution, one of the first limiting portion and the first stop portion is arranged on the cutting knife, and the other is arranged on the guide member, for limiting the cutting knife from moving to a position close to the reciprocating moving member.

[0016] The first elastic member is used for providing a force for the cutting knife to be away from the metal wire and is sleeved on the cutting knife.

[0017] As a further technical solution, the first stopper is arranged on the boss of the cutting knife, and the first limiting portion is a plane and is arranged on the guide member.

[0018] The second stopper is a plane and is arranged on the frame. The second limiting portion is a nut and is adjustable in position and is arranged on the moving frame.

[0019] As a further technical solution, the movable frame has a space for accommodating the wire, and the space has a long discharge hole.

[0020] Also includes,

[0021] A lead screw is rotatably arranged on the moving frame, and one end of the stopper is threadedly arranged on the lead screw, so as to move the stopper to adjust the position.

[0022] A swinging member is rotatably arranged on the frame and is located below the long discharge hole. One end of the swinging member has a connecting vertical plate. The cutting knife is connected to the connecting vertical plate to drive it to swing downward. A tension spring is arranged on the connecting vertical plate. The tension spring is used to provide a force for pulling the swinging member upward to return to its original position.

[0023] As a further technical solution, the straightening mechanism comprises:

[0024] A rotating frame is rotatably arranged on the frame,

[0025] A rotation driving device drives the rotating frame to rotate,

[0026] The straightening rollers are rotatably arranged on the rotating frame, and there are several of them. The axes of at least two of the straightening rollers are not parallel, and the axes of the straightening rollers are inclined to the axes of the metal wires, so as to straighten and drive the metal wires to move.

[0027] As a further technical solution, the rotation driving device is an electric motor, the rotating frame has a pulley, and the electric motor is connected to the pulley via a conveyor belt.

[0028] As a further technical solution, the rotating frame is a rectangular frame, and both the rectangular frame and the pulley have a through hole, and the through hole is used for the metal wire to pass through, and the through hole is coaxial with the metal wire.

[0029] As a further technical solution, the correction roller is arranged on the rectangular frame, and the rolling contact surface between the correction roller and the metal wire is a concave arc surface.

[0030] The working principle and beneficial effects of the present invention are:

[0031] The wire cutting machine in the prior art can only cut the wire, and the wire cutting length needs to be determined manually, and cannot be fully automated. To address the problem of being unable to fully automate, the inventor has specially designed a cutting mechanism, in which the frame is used as a carrier of other structures; wherein the reciprocating member is used to provide power for the cutting knife, the reciprocating member continuously moves up and down, and the cutting knife is driven by the moving frame to move laterally, and at the same time the cutting knife can move up and down along the guide member of the moving frame, and when the cutting knife is located below the reciprocating member, the cutting knife can be driven to move up and down; the moving frame can realize the function of moving along the advancing direction of the wire, wherein the stopper on the moving frame is used to stop the moving wire, and there is a certain distance between the stopper and the cutting knife, and the length of the wire to be cut can be adjusted by adjusting the length of this distance;

[0032] The guide member moves with the above-mentioned moving frame, wherein the guide member is provided with a guide hole for passing the metal wire through the guide hole, wherein the guide member is also provided with a countersunk hole, the bottom of the countersunk hole is vertically intersected with the above-mentioned guide hole; the cutting knife is slidably arranged in the countersunk hole of the guide member, and when the cutting knife is driven by the guide member to move below the reciprocating member, the reciprocating member will squeeze the cutting knife, and the cutting knife moves downward along the countersunk hole until the metal wire in the guide hole is cut off; wherein the working process of the above-mentioned cutting mechanism is that the metal wire passes through the guide member and then moves along the moving frame, when the metal wire resists the blocking part, the moving frame will have a displacement, the moving frame will move synchronously with the guide member, the guide block drives the cutting knife to the bottom of the reciprocating member, the reciprocating member will squeeze the cutting knife, and the cutting knife cuts the metal wire, wherein the cutting knife is not directly connected to the reciprocating member, but adopts a contact form, in order to realize intermittent motion, if it is in the form of previous connection, the cutting knife will continue to do the cutting motion, which can realize the function of automatic fixed length of the metal wire, and the function of automatic fixed length cutting of the metal wire can be realized through the above process. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] Figure 1 This is a schematic diagram of the structure of the straightening mechanism of the present invention;

[0035] Figure 2 It is a schematic diagram of the structure of the truncation mechanism of the present invention;

[0036] Figure 3 It is a schematic diagram of the overall structure of the present invention;

[0037] Figure 4 This is a schematic diagram of the three-dimensional structure of the truncation matching portion of the present invention;

[0038] Figure 5 It is a schematic diagram of the cross-sectional structure of the truncated matching part of the present invention;

[0039] In the figure: 1-frame, 2-reciprocating moving member, 3-moving frame, 301-blocking part, 4-guide member, 5-cutting knife, 6-second limiting part and second blocking part, 7-first limiting part and first blocking part, 8-first elastic member, 9-screw, 10-swinging member, 1001-connecting vertical plate, 11-rotating frame, 12-correction roller, DETAILED DESCRIPTION

[0040] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example 1

[0042] like Figure 1 to Figure 5 As shown, this embodiment provides a cutting mechanism for cutting a metal wire, comprising:

[0043] Rack 1,

[0044] The reciprocating member 2 reciprocates on the frame 1.

[0045] The movable frame 3 is arranged on the frame 1 for movement along the axial direction of the metal wire and has a stopper 301 for driving the movable frame 3 to move when the free end of the metal wire acts on the stopper 301.

[0046] The guide member 4 is arranged on the end of the movable frame 3 away from the stopper 301 and has a guide hole for the metal wire to pass through.

[0047] The cutting knife 5 is slidably set on the guide member 4 and approaches or moves away from the metal wire after sliding. The cutting knife 5 is located on one side of the guide hole. When the cutting knife 5 moves with the movable frame 3 to be located below the reciprocating moving member 2, the reciprocating moving member 2 moves and acts on the cutting knife 5 to cut the metal wire.

[0048] The wire cutting machine in the prior art can only cut the wire, and the wire cutting length needs to be determined by manual operation, and cannot be fully automated. In view of the problem that it cannot be fully automated, the inventor has specially designed a cutting mechanism, in which the frame 1 is used as a carrier of other structures; wherein the reciprocating member 2 is used to provide power for the cutting knife 5, the reciprocating member 2 continuously reciprocates up and down, and the cutting knife 5 is driven by the moving frame 3 to move laterally, and the cutting knife 5 can move up and down along the guide member 4 of the moving frame 3 at the same time, and the cutting knife 5 can be driven to move up and down when the cutting knife 5 is located below the reciprocating member 2; the moving frame 3 can realize the function of moving along the advancing direction of the wire, wherein the stopper 301 on the moving frame 3 is used to block the moving wire, and there is a certain distance between the stopper 301 and the cutting knife 5, and the length of the wire to be cut can be adjusted by adjusting the length of this distance.

[0049] The guide member 4 moves with the above-mentioned moving frame 3, wherein the guide member 4 has a guide hole for passing the metal wire through the guide hole, wherein the guide member 4 also has a countersunk hole, the bottom of which is vertically intersecting with the above-mentioned guide hole; the cutting knife 5 is slidably arranged in the countersunk hole of the guide member 4, and when the cutting knife 5 is driven by the guide member 4 to move below the reciprocating moving member 2, the reciprocating moving member 2 will squeeze the cutting knife 5, and the cutting knife 5 moves downward along the countersunk hole until the metal wire in the guide hole is cut off; wherein the working process of the above-mentioned cutting mechanism is that the metal wire passes through the guide member 4 and then moves forward along the moving frame 3 When the metal wire presses against the blocking part 301, the movable frame 3 will be displaced, and the movable frame 3 will move synchronously with the guide member 4. The guide block drives the cutting knife 5 to the bottom of the reciprocating moving member 2, and the reciprocating moving member 2 will squeeze the cutting knife 5, and the cutting knife 5 cuts the metal wire. The cutting knife 5 is not directly connected to the reciprocating moving member 2, but is in contact with it in order to achieve intermittent motion. If it is in the previous connection form, the cutting knife 5 will continue to make the cutting motion, which can realize the function of automatic fixed length of the metal wire. The function of automatic fixed length cutting of the metal wire can be realized through the above process.

[0050] Furthermore, one end of the reciprocating member 2 acting on the cutting knife 5 is stepped.

[0051] In order to realize the intermittent motion of the cutting knife 5 and realize automatic control in this embodiment, the inventor designs the contact surface between the reciprocating moving part 2 and the cutting knife 5 into a step shape, and the step shape can be divided into a long step at one end close to one end of the moving part and a short step at the other end. When the metal wire has not yet been set in length, the cutting knife 5 is under the short step of the reciprocating moving part 2, and the reciprocating movement of the reciprocating moving part 2 will not contact the cutting knife 5. When the metal wire has been set in length and moves against the stopper 301, the cutting can begin. The working process at this time is that the blocking part 301 drives the moving part to move, the moving part drives the guide part 4 to move, and the guide part 4 drives the cutting knife 5 to move horizontally. When the cutting knife 5 follows the moving frame 3 to move under the long step of the reciprocating moving part 2, the long step will contact the cutting knife 5, driving the cutting knife 5 to perform a cutting movement to realize the action of cutting the metal wire. The movement of the above mechanism can realize the intermittent cutting of the cutting knife 5, cutting when it is needed, and not cutting when it is not needed, thereby realizing automatic control.

[0052] Further, the second limiting portion and the second stopper 6, one of which is arranged on the frame 1 and the other is arranged on the moving frame 3, are used to limit the moving frame 3 from moving to a position close to the reciprocating moving member 2,

[0053] The second elastic member is used to provide a force for the moving frame 3 to approach the reciprocating moving member 2.

[0054] The sensor is a proximity switch, which is used for counting when the mobile rack 3 approaches the sensor.

[0055] In order to achieve the limit movement between the moving frame 3 and the reciprocating moving member 2 in the horizontal direction to the backward direction in the present embodiment, a second limit part and a second stop part 6 are specially designed. The second limit part is arranged on the reciprocating moving member 2, and the second stop part is arranged on the moving member. A second elastic member connects the moving frame 3 with the reciprocating moving member 2. The second elastic member is a spring. The spring provides power for the moving frame 3 to approach the reciprocating moving member 2. The second limit part can block the second stop part at an appropriate position, thereby determining the final position of the moving frame 3 moving in the horizontal direction to the backward direction; the sensor uses a proximity switch, and each time the moving frame approaches the proximity switch, a count is made to record the number of cut metal wires.

[0056] Furthermore, a first limiting portion and a first stop portion 7, one of which is disposed on the cutting knife 5 and the other of which is disposed on the guide member 4, are used to limit the cutting knife 5 from moving toward a position close to the reciprocating moving member 2.

[0057] The first elastic member 8 is used for providing a force to move the cutting knife 5 away from the metal wire and is sleeved on the cutting knife 5 .

[0058] In order to achieve vertical positioning between the cutting knife 5 and the reciprocating moving part 2 in this embodiment, a first limiting portion and a first stop portion 7 are specially designed, wherein one end of the spring is connected to the first limiting portion, and the other end is connected to the first stop portion 301, and the spring is used to provide power for the cutting knife 5 to move into the reciprocating moving part 2.

[0059] Further, the first stop is arranged on the boss of the cutting knife 5, and the first limiting portion is a plane arranged on the guide member 4.

[0060] The second stopper is a plane and is disposed on the frame 1 . The second limiting portion is a nut and is adjustable in position and is disposed on the moving frame 3 .

[0061] In order to achieve stable and accurate positioning of the cutting knife 5 in this embodiment, the first stop part 301 is a boss, the first limiting part is a plane, and is arranged on the guide member 4. The first limiting part is a plane and is arranged on the guide member 4. The boss and the plane can well realize the positioning of the spring therebetween, thereby ensuring stable positioning; the second stop part 301 is a plane and is arranged on the frame 1, and the second limiting part is a nut, which is adjustable in position and is arranged on the movable frame 3. The nut is used to achieve fine-tuning of the position of the movable member, thereby making the positioning of the cutting knife 5 more accurate. The above mechanism combination can achieve stable and accurate positioning of the cutting knife 5.

[0062] Furthermore, the movable frame 3 has a space for accommodating the metal wire, and the space has a long discharge hole.

[0063] Also includes,

[0064] The lead screw 9 is rotatably arranged on the moving frame 3, and one end of the stopper 301 is threadedly arranged on the lead screw 9, so as to move the stopper 301 to adjust the position.

[0065] The swing member 10 is rotatably arranged on the frame 1 and is located below the long discharge hole. One end of the swing member 10 has a connecting vertical plate 1001. The cutting knife 5 is connected to the connecting vertical plate 1001 to drive it to swing downward. A tension spring is arranged on the connecting vertical plate 1001, and the tension spring is used to provide the swing member 10 with a force to pull it back to its original position upward.

[0066] In this embodiment, in order to enable the metal wire to smoothly support the stopper 301, a accommodating space for the metal wire is specially designed, so that the metal wire can smoothly support the stopper 301; in order to adjust the length of the cut metal wire, the stopper 301 is specially designed with a threaded hole, which is threadedly connected to the lead screw 9, and the position of the stopper 301 is adjusted by rotating the lead screw 9, thereby adjusting the length of the cut metal wire; the swing frame is swingably set on the frame 1, and the metal wire after the stage falls onto the swing frame. The connecting vertical plate 1001 of the swing frame is slidably connected with the cutting knife 5. Every time the cutting knife 5 performs a descending and cutting action, it will drive the swing member 10 to perform a swing action. This swing is to allow the metal wire to swing out of the swing member 10, wherein the swing vertical plate is connected to the frame 1 by a tension spring, and the tension spring provides a force for the swing member 10 to approach the frame 1, so that the swing member 10 is reset.

[0067] Further, the straightening mechanism comprises,

[0068] A rotating frame 11 is rotatably arranged on the frame 1.

[0069] The rotating driving device drives the rotating frame 11 to rotate,

[0070] The straightening rollers 12 are rotatably arranged on the rotating frame 11. There are several straightening rollers 12, and the axes of at least two of the straightening rollers 12 are not parallel. The axes of the straightening rollers 12 are inclined to the axes of the metal wires, and are used for straightening and driving the metal wires to move.

[0071] In order to achieve the function of straightening and cutting the bent metal wire in this embodiment, a straightening mechanism is set, wherein the rotating frame 11 is set on the frame 1, and can be rotated on the frame 1, and the rotating drive device can provide power for the rotation of the rotating frame 11, and the straightening roller 12 is used to straighten the metal wire at multiple angles and multiple positions, wherein the rotating pneumatic device drives the rotating frame 11 to rotate, and at this time, multiple straightening rollers 12 rotate together with the rotating frame 11, wherein the rotation trajectory of the straightening roller 12 is a circle, thereby achieving 360° all-round straightening, and the circumference is the same size, and the axis is collinear. The operation of the above mechanism can achieve the straightening of the metal wire.

[0072] Furthermore, the rotation driving device is an electric motor, the rotating frame 11 has a pulley 1101, and the electric motor is connected to the pulley 1101 through a conveyor belt.

[0073] In this embodiment, in order to realize the rotation of the rotating frame 11, a rotation driving device is specially provided. The rotation driving device is an electric motor, which can continuously realize the rotation movement. It is connected to the rotating frame 11 through a pulley. The advantage of using belt drive is that the center distance has a large variation range and can be used for transmission over long distances. It runs smoothly, has low noise, can absorb shock and buffer, and has overload protection.

[0074] Furthermore, the rotating frame 11 is a rectangular frame, and both the rectangular frame and the pulley 1101 have a through hole, and the through hole is used for the metal wire to pass through, and the through hole is coaxial with the metal wire.

[0075] In order to achieve the quality of wire straightening in this embodiment, the rotating frame 11 is specially designed as a rectangular frame. The rectangular frame and the pulley 1101 both have through holes, and the through holes are also concentric with the circumference of the rotation trajectory of the positive roller. Multiple concentric structures are used to straighten the wire to ensure the quality of the straightened wire.

[0076] Furthermore, the correction roller 12 is arranged on the rectangular frame, and the rolling contact surface between the correction roller 12 and the metal wire is a concave arc surface.

[0077] In order to improve the straightening quality of the metal wire in this embodiment, the rolling contact surface of the straightening roller 12 is specially designed to be a concave arc surface. The arc surface and the tilting mechanism of the straightening roller 12 can maximize the contact area between the straightening roller 12 and the metal wire, thereby improving the straightening quality of the metal wire.

[0078] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cutting mechanism for cutting a metal wire, characterized in that: include, Rack (1), A reciprocating member (2) reciprocates on the frame (1). The movable frame (3) is arranged on the frame (1) for movement along the axial direction of the metal wire, and has a stopper (301) for driving the movable frame (3) to move when the free end of the metal wire acts on the stopper (301). A guide member (4) is arranged on an end of the movable frame (3) away from the blocking portion (301), and has a guide hole for the metal wire to pass through. a cutting knife (5) which is slidably arranged on the guide member (4) and moves closer to or farther from the metal wire after sliding; the cutting knife (5) is located on one side of the guide hole; when the cutting knife (5) moves with the moving frame (3) to a position below the reciprocating member (2), the reciprocating member (2) moves and acts on the cutting knife (5) to cut the metal wire; One end of the reciprocating member (2) acting on the cutting knife (5) is in a stepped shape; the stepped shape is divided into a long step at one end close to one end of the moving member and a short step at the other end; when the length of the metal wire is not yet fixed, the cutting knife (5) is under the short step of the reciprocating member (2); when the length of the metal wire is fixed, the stopper (301) drives the moving member to move, the moving member drives the guide member (4) to move, and the guide member (4) drives the cutting knife (5) to move horizontally; when the cutting knife (5) follows the moving frame (3) to move under the long step of the reciprocating member (2), the long step will contact the cutting knife (5), driving the cutting knife (5) to perform a cutting movement; Also includes, A second limiting portion and a second stopper (6), one of which is arranged on the frame (1) and the other is arranged on the moving frame (3), for limiting the moving frame (3) from moving to a position close to the reciprocating moving member (2). a second elastic member, used for providing a force for the moving frame (3) to approach the reciprocating moving member (2), A sensor, the sensor being a proximity switch, used for counting when the mobile rack (3) approaches the sensor; Also includes, A first limiting portion and a first stopper (7), one of which is arranged on the cutting knife (5) and the other of which is arranged on the guide member (4), for limiting the cutting knife (5) from moving to a position close to the reciprocating member (2). A first elastic member (8), used for providing a force to move the cutting knife (5) away from the metal wire, and sleeved on the cutting knife (5); The first stop portion is arranged on a boss of the cutting knife (5); the first limit portion is a plane and is arranged on the guide member (4); The second stop portion is a plane and is arranged on the frame (1); the second limit portion is a nut and is adjustably arranged on the movable frame (3); The movable frame (3) has a space for accommodating the metal wire, and the space has a long discharge hole. Also includes, a lead screw (9), the lead screw (9) being rotatably disposed on the movable frame (3), one end of the stopper (301) being threadedly disposed on the lead screw (9) for moving the stopper (301) to achieve position adjustment, A swinging member (10) is rotatably arranged on the frame (1) and is located below the long discharge hole. One end of the swinging member has a connecting vertical plate (1001). The cutting knife (5) is connected to the connecting vertical plate (1001) to drive it to swing downward. A tension spring is arranged on the connecting vertical plate (1001). The tension spring is used to provide a force for the swinging member (10) to pull it back to its original position upward.

2. A CNC straight wire machine having a cutting mechanism according to claim 1, characterized in that: It also includes a straightening mechanism, which is arranged before the cutting mechanism, and the straightening mechanism includes: A rotating frame (11) is rotatably disposed on the frame (1), A rotation driving device drives the rotating frame (11) to rotate, A plurality of straightening rollers (12) are rotatably arranged on the rotating frame (11), wherein the axes of at least two of the straightening rollers (12) are not parallel, and the axes of the straightening rollers (12) are inclined to the axes of the metal wires, and are used for straightening and driving the metal wires to move.

3. The CNC straight wire machine according to claim 2, characterized in that: The rotation driving device is an electric motor, the rotating frame (11) has a pulley (1101), and the electric motor is connected to the pulley (1101) via a conveyor belt.

4. The CNC straight wire machine according to claim 3, characterized in that: The rotating frame (11) is a rectangular frame, and both the rectangular frame and the pulley (1101) have a through hole, the through hole is used to allow the metal wire to pass through, and the through hole is coaxial with the metal wire.

5. The CNC straight wire machine according to claim 4, characterized in that: The correction roller (12) is arranged on the rectangular frame, and the rolling contact surface between the correction roller (12) and the metal wire is a concave arc surface.

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