CN114799906A - Material rod clamping and pushing linkage device - Google Patents

Abstract

The invention belongs to the technical field of lathe machining, and discloses a material bar clamping and pushing linkage device which comprises a base and is characterized in that a bar clamping device, a material cutting and receiving device and a pushing and supporting linkage device are arranged on the base; through the mutual cooperation of the bar clamping device, the cutting and receiving device and the pushing and supporting linkage device, the grinding and rolling continuous operation of a grinding and rolling tool bit is realized, and the coordinated linkage integral linkage control of a plurality of processes of clamping, grinding, rolling, cutting, supporting, pushing and the like of a material bar to be cut is realized, so that the working efficiency is improved; in the material pushing and supporting linkage device, the material supporting mechanism, the linkage trigger mechanism and the material pushing mechanism are mutually matched to realize the smooth, quick and accurate pushing and in-place of the material rods to be cut, so that the next period of working procedures can be conveniently carried out, and the overall processing efficiency is greatly improved.

Description

A material bar clamping and pushing material linkage device

technical field

The invention belongs to the technical field of lathe machining, and in particular relates to a material bar clamping and pushing material linkage device.

Background technique

Grinding is a mechanical processing method for removing materials, which refers to the processing method of removing excess material on the workpiece with abrasives and abrasive tools. Grinding is one of the most widely used material removal methods.

Rolling is a process commonly used in automobile production, including rolling of inner holes, rolling of rims, rolling forming of door frame strips, rolling forming of frame longitudinal beams, rolling strengthening and straightening of crankshafts, Roll forming of small modulus spline shafts, rolling forming of screws, etc.

Polishing refers to the use of mechanical, chemical or electrochemical action to reduce the surface roughness of the workpiece to obtain a bright and smooth surface. When the polishing machine is working, the wheels of soft materials such as cloth, leather or wood with abrasives are generally used to rotate at high speed to wipe the surface of the workpiece and improve its surface finish. The traditional polishing machine has a good polishing effect on low-curvature planes and surfaces. However, when polishing the circumferential surface, uneven polishing occurs, which greatly reduces the processing efficiency, and the vibration of the traditional polishing machine will also reduce the polishing effect. .

The above processes all require a device for holding and fixing the material to be cut and automatically feeding the material to ensure that the previous process can be carried out smoothly, smoothly and quickly.

SUMMARY OF THE INVENTION

The purpose of the invention is to provide a material bar clamping and pushing material linkage device, which realizes the smooth, fast and accurate moving of the material bar to be cut in place, so as to facilitate the process of the next cycle and greatly improve the overall processing efficiency; The technical solutions adopted for the above purposes are:

A material bar clamping and pushing material linkage device, comprising a base, on which a bar material clamping device, a material cutting and receiving device and a material pushing and pushing linkage device are installed;

The bar material clamping device includes a second lead screw slide mechanism, the slide table of the second lead screw slide mechanism moves in the front and rear directions, a support frame is installed on the slide table, and a rotatable connection in the support frame is provided. A vertical rotating shaft, the vertical rotating shaft is divided into an upper threaded section, a smooth section and a lower threaded section from top to bottom, and a second servo motor that provides power for the rotation of the vertical rotating shaft is arranged at the bottom of the support frame; on the support frame A vertical slideway is provided, and an upper clamping arm and a lower clamping arm are slidably connected up and down in the vertical slideway. An upper arc-shaped clamping plate is arranged at the front end of the upper clamping arm, and a lower arc-shaped clamping plate is arranged at the front end of the lower clamping arm. The upper arc-shaped clamping plate and the lower arc-shaped clamping plate are used for cutting Clamping of the material rod;

The material cutting and receiving device includes a wire cutting device and a material receiving device, the wire cutting device is used for cutting the material bar to be cut, and the material receiving device is used for receiving the cut material plate;

The push-pulling linkage device includes a linkage trigger mechanism, a material-supporting mechanism and a push-feed mechanism, wherein the linkage trigger mechanism includes a trigger support, and a transmission rod is slidably connected up and down in the trigger support, and a trigger rod is slidably connected to the left and right, and a rotating connection is provided. There is a horizontal rotating shaft, a steering gear is fixed on the horizontal rotating shaft, and teeth are provided on the transmission rod, the trigger rod and the horizontal rotating shaft, that is, the transmission rod and the horizontal rotating shaft are meshed and connected, and the steering gear is meshed with the trigger rod. There is a contact rod on the clamping arm. When the lower clamping arm moves downward, the contact rod presses down the transmission rod, the transmission rod drives the horizontal shaft to rotate, the steering gear drives the trigger rod to move, and the trigger rod triggers the action of the material support mechanism. , the downward movement of the bottom of the transmission rod triggers the action of the pushing mechanism.

Preferably, a support seat is provided in the middle of the support frame, the vertical shaft passes through the support seat and is rotatably connected to the support seat, the upper threaded section and the smooth section of the vertical shaft are located above the support seat, and the lower threaded section is located below the support seat A compression spring is sleeved on the upper thread section above the upper clamping arm, one end of the compression spring is pressed against the end of the upper clamping arm, and the other end of the compression spring is pressed against the support frame on the top of the upper thread section.

Preferably, a threaded adjusting rod is provided on the lower clamping arm, a strip-shaped hole arranged along the length direction is provided on the threaded adjusting rod, two adjusting rods are slidably connected in the strip-shaped hole, and the two adjusting rods are All are provided with a lower arc-shaped clamping plate, and adjusting nuts are provided on the left and right sides and the upper and lower sides of the adjusting rod, and the adjusting nuts are threadedly connected with the threaded adjusting rod.

Preferably, the material support mechanism includes a material support support, a material support rod is slidably connected up and down in the material support support, and a spring for pushing the material support rod to pop up is provided at the bottom of the material support rod. The top is provided with an arc-shaped material support plate, and a spring button is arranged on the material support support. When the trigger lever triggers the spring button, the material support lever pops up under the action of the spring to lift and support the material bar to be cut; When the rod is disengaged from the spring button, manually push down the support rod to reset.

Preferably, the material pushing mechanism includes a material pushing support, in which a material pushing transmission rod is slidably connected up and down, a material pushing trigger rod is slidably connected to the left and right, a horizontal rotating shaft is rotatably connected, and a horizontal rotating shaft is fixed on the horizontal rotating shaft. The two steering gears are provided with teeth on the pusher transmission rod and the pusher trigger rod, that is, the pusher transmission rod meshes with the gear on the horizontal rotating shaft, and the steering gear and the pusher trigger rod are meshed and connected; in the linkage trigger mechanism A balance-type swing rod is arranged between it and the pusher transmission rod, one end of the balance-type swing rod is hinged with the bottom of the transmission rod, the other end of the balance-type swing rod is hinged with the bottom of the pusher transmission rod, and one end of the balance-type swing rod is set. Has return spring.

Preferably, the arc-shaped material support plate includes an arc-shaped plate with an opening facing upward, and a positioning plate is provided on the side surface of the arc-shaped plate.

Preferably, it also includes a material pushing auxiliary mechanism, the material pushing auxiliary mechanism includes a frame body, a step slider is slidably connected left and right in the frame body, and a cross push frame for pushing the material bar to be cut is fixedly connected to the right end of the step slider. , There is a groove at the left end of the step slider, and there are multiple steps on the opposite inner wall of the groove, the multiple steps on both sides are symmetrically distributed, and the distance between the multiple steps on both sides is gradually from left to right. The left end of the frame body is slidably connected to the left and right with a slide bar, the right end of the slide bar extends into the groove, two guide rods are symmetrically arranged on the right end of the slide bar, and a push arm is slidably connected to the guide rod, and the push arm and the A spring is sleeved on the guide rod between the slide bars, and under the pressure of the spring, the push arm is pressed against the corresponding multi-step steps.

Preferably, the push arm is provided with a connecting rod extending out of the groove, and the left end of the sliding bar is connected with the pushing trigger rod.

The beneficial effects of the present invention are: (1) Through the interaction of the bar material clamping device C, the material cutting and receiving device A, and the pushing and pushing material linkage device D, the grinding, The continuous operation of rolling, as well as the coordinated linkage and overall linkage control of a series of process actions such as clamping, grinding, rolling, cutting, feeding, and pushing of the material bar C21 to be cut, improve work efficiency.

(2) In the bar material clamping device C, the fast clamping and releasing of the material bar C21 to be cut is realized by setting different thread segments and smooth segments on a vertical rotating shaft, and the overall structure is relatively compact; The left and right sides and the upper and lower sides of the adjusting rod are provided with adjusting nuts, and the adjusting nuts are threadedly connected with the threaded adjusting rod to realize the free adjustment of the up, down, left and right directions of the adjusting rod. The coordination can move left and right up and down during processing.

(3) In the push-pulling linkage device D, through the mutual cooperation of the feeding mechanism D1, the linkage trigger mechanism D2, and the pushing mechanism D3, the stable, fast and accurate pushing of the material bar C21 to be cut is realized, so as to facilitate the next cycle. process, greatly improving the overall processing efficiency.

Description of drawings

Fig. 1 is one of the three-dimensional structure schematic diagrams of the present invention;

Fig. 2 is the second schematic diagram of the three-dimensional structure of the present invention;

Fig. 3 is the three-dimensional structure schematic diagram of the bar material clamping device;

Fig. 4 is the enlarged structural representation of G part in Fig. 3;

Figure 5 is a schematic diagram of the vertical body structure of the feeding device;

Fig. 6 is the body structure schematic diagram of pushing material linkage device;

Fig. 7 is the enlarged structural representation of K part in Fig. 6;

FIG. 8 is one of the three-dimensional schematic diagrams of the pushing auxiliary mechanism;

FIG. 9 is the second schematic diagram of the three-dimensional structure of the pushing auxiliary mechanism;

Figure 10 is a cross-sectional view of the pushing auxiliary mechanism along the H-H direction.

Detailed ways

The present invention is further described below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, a grinding and rolling equipment that can work continuously includes a base 1, on which are installed a bar clamping device C, a material cutting and receiving device A, and a pushing material linkage device D;

As shown in FIG. 3 , the bar clamping device C includes a second lead screw sliding table mechanism C14, and the sliding table C20 of the second lead screw sliding table mechanism C14 moves in the front-rear direction, and is installed on the sliding table C20 There is a supporting frame C1, and a vertical rotating shaft is rotatably connected in the supporting frame C1. The vertical rotating shaft is divided into an upper threaded section C8, a smooth section C9 and a lower threaded section C11 in turn from top to bottom, and the bottom of the supporting frame C1 is provided with a A second servo motor C13 that provides power for the rotation of the vertical shaft; a vertical slideway is provided on the support frame C1, and an upper clamping arm C6 and a lower clamping arm C2 are slidably connected up and down in the vertical slideway, and the upper clamping arm C6 and the lower clamping arm C2 are connected. The end of the arm C6 is threadedly connected with the upper threaded section C8, the end of the lower clamping arm C2 is threadedly connected with the lower threaded section C11, an upper arc-shaped clamping plate C4 is arranged at the front end of the upper clamping arm C6, and the front end of the lower clamping arm C2 is provided with an upper arc clamping plate C4. A lower arc-shaped clamping plate C5 is provided, and the upper arc-shaped clamping plate C4 and the lower arc-shaped clamping plate C5 are used for clamping the material bar C21 to be cut;

As shown in FIG. 1 , FIG. 2 and FIG. 5 , the cutting and splicing device A includes a wire cutting device A1 and a splicing device A2. The wire cutting device A21 is used for cutting the material bar C21 to be cut. The material receiving device A2 is used to accept the cut material plate; in this embodiment, the material receiving device A2 can adopt the following structure, the material receiving device A2 includes a support A27, and the support plate A24 and the support plate A24 are fixed on the support A27. The fourth servo motor A26, the support plate A24 is slidably connected with the feeder plate A22 through the guide rod A23, and the support plate A24 is rotatably connected with a threaded rod A21, the threaded rod A21 penetrates the support plate A24, and is connected with the support plate A24 Threaded connection, the transmission connection between the threaded rod A21 and the fourth servo motor A26 is performed through the bevel gear A25.

As shown in Fig. 1, Fig. 2, Fig. 6 and Fig. 7, in order to realize the automatic linkage action of supporting material and pushing material after cutting is completed, the equipment also includes a pushing material linkage device D, the pushing material interlocking device D It includes a linkage trigger mechanism D2, a material support mechanism D1 and a push mechanism D3, wherein the linkage trigger mechanism D2 includes a trigger support D21, and a transmission rod D25 is slidably connected up and down in the trigger support D21, and a trigger rod D22 is slidably connected to the left and right. The horizontal rotating shaft D24 is rotatably connected, the steering gear D26 is fixed on the horizontal rotating shaft D24, and the transmission rod D25, the trigger rod D22 and the horizontal rotating shaft D24 are all provided with teeth, that is, the transmission rod D25 is meshed with the horizontal rotating shaft D24. The gear D26 is meshed with the trigger lever D22, and a contact lever C3 is arranged on the lower clamping arm C2. When the lower clamping arm C2 moves downward, the contact lever C3 presses down the transmission rod D25, and the transmission rod D25 drives the horizontal rotating shaft D24 rotates, the steering gear D24 drives the trigger rod D22 to move, the trigger rod D22 triggers the action of the feeding mechanism D1, and at the same time, the bottom of the transmission rod D25 moves downward to trigger the action of the pushing mechanism D3.

As shown in FIGS. 3 and 4 , a support base C10 is provided in the middle of the support frame C16, the vertical shaft passes through the support base C10 and is rotatably connected to the support base C10, the upper threaded section C8 and the smooth section C9 of the vertical shaft Located above the support seat C10, the lower thread segment C11 is located below the support seat C10; a compression spring C7 is sleeved on the upper thread segment C8 above the upper clamping arm C6, and one end of the compression spring C7 abuts against the upper clamping arm C6. At the end, the other end of the compression spring C7 abuts on the support frame C1 at the top of the upper threaded section C8.

On the other hand, a threaded adjusting rod C17 is provided on the lower clamping arm C2, a bar-shaped hole C19 arranged along the length direction is provided on the threaded adjusting rod C17, and two adjusting rods C18 are slidably connected in the bar-shaped hole C19. , a lower arc-shaped clamping plate C5 is provided on the two adjusting rods C18, and adjusting nuts C16 are provided on both sides of the adjusting rod C18. C16 can adjust the distance between the two adjusting rods C18 to adapt to different diameters of the material rods C21 to be cut.

The material supporting mechanism D1 includes a material supporting support D12, a material supporting rod D13 is slidably connected up and down in the material supporting support D12, and a spring D11 for pushing the material supporting rod D13 to pop up is provided at the bottom of the material supporting rod D13. The top of the material support rod D13 is provided with an arc-shaped material support plate D16, and a spring button D14 is provided on the material support support D12. When the trigger rod D22 triggers the spring button, the material support rod D13 pops up under the action of the spring D11. Lift and support the material bar C21 to be cut; when the trigger lever is released from the spring D14 button, manually push down the material lever D13 to reset.

Further, the arc-shaped material support plate D16 includes an arc-shaped plate with an upward opening, and a positioning plate D15 is provided on the side of the arc-shaped plate, so that when the material bar C21 to be cut is pushed forward, it abuts against the positioning plate D15 Push it in place.

The pushing mechanism D3 includes a pushing support D36, a pushing transmission rod D33 is slidably connected up and down in the pushing support D36, a pushing trigger rod D35 is slidably connected to the left and right, and a horizontal rotating shaft D34 is rotatably connected. Two steering gears D37 and D39 are fixed on D34, and teeth are provided on both the pusher transmission rod D33 and the pusher trigger rod D35, that is, the pusher transmission rod D33 meshes with the gear D37 on the horizontal shaft D34, and the steering gear D39 is connected to the The push trigger lever D35 is meshed and connected; a balance swing lever D32 is arranged between the linkage trigger mechanism D2 and the pusher transmission lever D33, one end of the balance swing lever D32 is hinged with the bottom of the transmission lever D25, and the balance swing lever D32 The other end is hinged with the bottom of the pusher transmission rod D33, and a return spring D31 is provided at one end of the balance-type pendulum rod D32.

As shown in Fig. 8, Fig. 9 and Fig. 10, it also includes a material pushing auxiliary mechanism E, the material pushing auxiliary mechanism E includes a frame body E7, and a step slider E8 is slidably connected left and right in the frame body E7. The right end of E8 is fixedly connected with a cross pusher E6 for pushing the material bar C21 to be cut, a groove is provided on the left end of the step slider E8, and a multi-step step E5 is provided on the opposite inner wall in the groove, and the multi-step steps on both sides are provided. The steps E5 are symmetrically distributed, and the distance between the multi-step steps E5 on both sides decreases step by step from left to right. A slider E4 is slidably connected to the left end of the frame E7, and the right end of the slider E4 extends into the groove. Two guide rods are symmetrically arranged at the right end of the slider E4, and a push arm E1 is slidably connected to the guide rod. A spring E3 is sleeved on the guide rod between the push arm E1 and the slider E4. Under the pressure of the spring E3 , the push arm E1 abuts on the corresponding multi-step step E5.

As shown in Figure 3, in order to ensure that the relative position between the pushing auxiliary mechanism E and the material bar C21 to be cut remains unchanged, so as to push the material bar C21 to be cut more accurately and stably, the pushing auxiliary mechanism E can be fixed on the upper clamp on arm C6.

In order to facilitate the reset of the two push arms E1 so as to push the new material bar C21 to be cut and perform the next cycle action, the push arm E1 is provided with a connecting rod E2 extending out of the groove, and the left end of the slide bar E4 It is connected with the push trigger lever D35.

When the present invention is working, as shown in Figure 1, Figure 2, Figure 3 and Figure 4, firstly, the material bar C21 to be cut is fixed on the bar material clamping device C, and the specific steps are as follows: the second servo motor C13 drives the vertical The straight shaft rotates, the upper clamping arm C6 and the lower clamping arm C2 are driven by the upper thread segment C8 and the lower thread segment C11 to move the next piece downward. When the upper clamping arm C6 moves down to the smooth segment C9, it does not move downward. Movement, the lower clamping arm C2 continues to move downward to open the upper arc clamping plate C4 and the lower arc clamping plate C5. According to the diameter of the material bar C21 to be cut, adjust the two adjusting nuts C16 to adjust the two adjusting rods The distance between C18, put the material bar C21 to be cut on the two lower arc-shaped clamping plates C5, press its tail against the cross pusher E6, and then rotate the vertical shaft in the opposite direction, the lower clamping arm C2 With the material bar C21 to be cut moving upward, when it reaches the upper arc clamping plate C4, with the continuous rise of the lower clamping arm C2 and the pressure of the compression spring C7, the upper clamping arm C6 will be further clamped The material bar C21 to be cut is then threadedly connected to the upper threaded section C8, and then the upper clamping arm C6, the material bar C21 to be cut and the lower clamping arm C2 are raised to an appropriate height as a whole, and finally the servo motor C15 acts to drive the sliding table C20 and its components. The whole on the top is moved back and forth to the appropriate position, and the adjustment is completed.

When the above processes are over, the end face of the C21 bar to be cut is ground, rolled and cut by the machine tool’s own grinding and rolling tool. As shown in Figure 1, Figure 2 and Figure 5, the wire cutting device A1 can use existing equipment, and use wire cutting technology to cut the end face after grinding and rolling treatment. At this time, the fourth servo motor A26 The action drives the threaded rod A21 to rotate, thereby driving the material receiving plate A22 to quickly extend to catch the cut product sheet.

After the material cutting and material receiving process is finished, the material bar C21 to be cut is moved forward step by step through the push-up material linkage device D to perform grinding, rolling and cutting operations in the next cycle. First, the second servo motor C13 drives the vertical shaft to rotate, and the upper clamping arm C6, the material bar C21 to be cut and the lower clamping arm C2 move downward as a whole under the driving of the upper thread segment C8 and the lower thread segment C11. The clamping arm C6 does not move downward after it moves down to the smooth section C9, and the lower clamping arm C2 continues to move downward to open the upper arc clamping plate C4 and the lower arc clamping plate C5. At this time, the contact rod C3 Pressing on the transmission rod D25, the transmission rod D25 moves downward, on the one hand, it drives the trigger rod D22 to extend and press on the spring button D14. Lift the support; when the trigger lever is released from the spring D14 button, manually push down the support lever D13 to reset. The transmission rod D25 moves downward. On the other hand, press down one end of the balance-type pendulum rod D32 to push the push transmission rod D33 to move upward, thereby driving the push trigger rod D35 to extend. Connect, as shown in Figure 8 to Figure 10, so as to drive the slider E4 to push forward a certain distance, the slider E4 pushes the step slider E8 to the right, and the cross pusher E6 pushes the material bar C21 to be cut forward to a suitable position, or push it until the The end of the cutting material bar C21 abuts on the positioning plate D15, that is, it is pushed to the process position.

When the material bar C21 to be cut is pushed into place, the upper clamping arm C6, the material bar C21 to be cut and the lower clamping arm C2 move upward as a whole to reset, and under the action of the return spring D31, push the material support rod D13 and the transmission rod D25 , The slider E4 must be reset. During the return and reset process of the slider E4, the push arms E1 on both sides will be raised by a step, so that the next cycle will not be affected.

In this embodiment, the pushing auxiliary mechanism E can also be fixedly installed at the top position of the pushing mechanism D3, and the connecting end D38 of the pushing trigger rod D35 can be directly and fixedly connected to the slide bar E4. In order to reduce the hard contact between the trigger lever D22 and the spring button D14, an elastic contact D23 is provided at the end of the trigger lever D22.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. A material bar clamping and pushing linkage device comprises a base and is characterized in that a bar clamping device, a material cutting and receiving device and a pushing and supporting linkage device are mounted on the base;

the bar clamping device comprises a second lead screw sliding table mechanism, a sliding table of the second lead screw sliding table mechanism moves in the front-back direction, a supporting frame is mounted on the sliding table, a vertical rotating shaft is connected in the supporting frame in a rotating mode, the vertical rotating shaft is sequentially divided into an upper threaded section, a smooth section and a lower threaded section from top to bottom, and a second servo motor for providing power for the rotation of the vertical rotating shaft is arranged at the bottom of the supporting frame; the cutting device comprises a supporting frame, and is characterized in that a vertical slideway is arranged on the supporting frame, an upper clamping arm and a lower clamping arm are vertically and slidably connected in the vertical slideway, the tail end of the upper clamping arm is in threaded connection with an upper threaded section, the tail end of the lower clamping arm is in threaded connection with a lower threaded section, an upper arc-shaped clamping plate is arranged at the front end of the upper clamping arm, a lower arc-shaped clamping plate is arranged at the front end of the lower clamping arm, and the upper arc-shaped clamping plate and the lower arc-shaped clamping plate are used for clamping a material bar to be cut;

the cutting and receiving device comprises a linear cutting device and a receiving device, the linear cutting device is used for cutting a material bar to be cut, and the receiving device is used for receiving the cut material plate;

the material pushing and supporting linkage device comprises a linkage trigger mechanism, a material supporting mechanism and a material pushing mechanism, wherein the linkage trigger mechanism comprises a trigger support, a transmission rod is connected in the trigger support in a vertical sliding mode, a trigger rod is connected in the trigger support in a horizontal sliding mode, a horizontal rotating shaft is connected in the rotating mode, a steering gear is fixed on the horizontal rotating shaft, teeth are arranged on the transmission rod, the trigger rod and the horizontal rotating shaft, namely the transmission rod is connected with the horizontal rotating shaft in a meshing mode, the steering gear is connected with the trigger rod in a meshing mode, a contact rod is arranged on a lower clamping arm, when the lower clamping arm moves downwards, the contact rod presses the transmission rod downwards, the transmission rod drives the horizontal rotating shaft to rotate, the steering gear drives the trigger rod to move, the trigger rod triggers the material supporting mechanism to move, and meanwhile, the bottom of the transmission rod moves downwards to trigger the material pushing mechanism to move.

2. The material bar clamping and pushing linkage device as claimed in claim 1, wherein a support seat is provided at the middle part of the support frame, the vertical shaft passes through the support seat and is rotatably connected with the support seat, an upper threaded section and a smooth section of the vertical shaft are located above the support seat, and a lower threaded section is located below the support seat; and a pressure spring is sleeved on the upper threaded section above the upper clamping arm, one end of the pressure spring abuts against the tail end of the upper clamping arm, and the other end of the pressure spring abuts against a supporting frame at the top of the upper threaded section.

3. A bar clamping and pushing linkage as claimed in claim 2, wherein the lower clamping arm has a threaded rod, the threaded rod has a strip-shaped hole along the length thereof, two adjusting rods slidably connected in the strip-shaped hole, the two adjusting rods each have a lower arc-shaped clamping plate, and the left and right sides and upper and lower sides of the adjusting rod have adjusting nuts threadedly connected to the threaded rod.

4. The material bar clamping and pushing linkage device according to claim 2, wherein the material supporting mechanism comprises a material supporting support, a material supporting rod is connected in the material supporting support in a vertical sliding manner, a spring for pushing the material supporting rod to pop up is arranged at the bottom of the material supporting rod, an arc-shaped material supporting plate is arranged at the top of the material supporting rod, a spring button is arranged on the material supporting support, and when the spring button is triggered by a trigger rod, the material supporting rod pops up under the action of the spring to support the material bar to be cut; when the trigger rod is separated from the spring button, the material supporting rod can be reset by manually pressing down the material supporting rod.

5. The material bar clamping and pushing linkage device as claimed in any one of claims 1 to 4, wherein the pushing mechanism comprises a pushing support, a pushing transmission rod is connected in the pushing support in a vertical sliding manner, a pushing trigger rod is connected in the pushing support in a left-right sliding manner, a horizontal rotating shaft is rotatably connected, two steering gears are fixed on the horizontal rotating shaft, teeth are arranged on the pushing transmission rod and the pushing trigger rod, namely the pushing transmission rod is meshed with a gear on the horizontal rotating shaft, and the steering gears are meshed with the pushing trigger rod; a balance type swing rod is arranged between the linkage trigger mechanism and the material pushing transmission rod, one end of the balance type swing rod is hinged to the bottom of the transmission rod, the other end of the balance type swing rod is hinged to the bottom of the material pushing transmission rod, and a return spring is arranged at one end of the balance type swing rod.

6. The material bar clamping and pushing linkage device as claimed in claim 5, wherein the arc-shaped material supporting plate comprises an arc-shaped plate with an upward opening, and a positioning plate is arranged on the side surface of the arc-shaped plate.

7. The material bar clamping and pushing linkage device as claimed in claim 5, further comprising a pushing auxiliary mechanism, wherein the pushing auxiliary mechanism comprises a frame body, a step slide block is connected in the frame body in a left-right sliding way, a cross-shaped pushing frame used for pushing a material bar to be cut is fixedly connected at the right end of the step slide block, the left end of the step slide block is provided with a groove, the opposite inner walls in the groove are provided with multi-stage steps, the multi-stage steps at two sides are symmetrically distributed, and the distance between the multi-stage steps at two sides is gradually reduced from left to right, the left end of the frame body is connected with a slide bar in a left-right sliding way, the right end of the slide bar extends into the groove, two guide rods are symmetrically arranged at the right end of the slide bar, the guide rod is connected with a push arm in a sliding mode, a spring is sleeved on the guide rod between the push arm and the slide bar, and the push arm abuts against the corresponding multistage step under the pressure action of the spring.

8. The material bar clamping, pushing and supporting linkage device as claimed in claim 7, wherein a connecting rod extending out of the groove is arranged on the pushing arm, and the left end of the sliding strip is connected with the pushing trigger rod.

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