CN112355068B - A cantilever drawing machine - Google Patents

Abstract

The invention discloses a cantilever drawing machine which comprises a box body, a feeding motor, a supporting rod, a sliding block and a receiving platform, wherein the feeding motor is arranged on the upper surface of the box body, the outer surface of one side of the feeding motor is connected with the feeding rod, the outer surface of the feeding rod is connected with a feeding chamber, the outer surface of the feeding chamber is penetrated by a clamping rod, a clamping spring is connected between the clamping rod and the feeding chamber, the outer surface of the sliding block is provided with the drawing motor, the sliding block is fixed on the side surface of the box body, and the receiving platform is arranged on the upper surface of the box body. This cantilever drawbench is provided with the bull stick of drawing, rotates and drives through the bull stick of drawing and draw the piece and carry out gliding mode and draw to the steel pipe main part, because the bull stick of drawing is very firm with drawing the threaded connection of piece and be difficult to take place to skid for the steel pipe main part receives the stability that the drawing force is very, is favorable to improving the drawing effect of steel pipe main part.

Description

A cantilever drawing machine

Technical Field

The invention relates to the technical field of drawing machines, in particular to a cantilever drawing machine.

Background technique

In the process of mechanical processing, there are many mechanical processing methods for steel pipes, such as stamping, forging, roller processing, rolling, bulging and drawing, etc. Among them, drawing is especially suitable for seamless steel pipes with small diameter and high quality. For the cold drawing of steel pipes, the commonly used tooling equipment is chain or hydraulic drawing machine, which uses hydraulic pressure as the driving force for drawing. However, since the hydraulic station that controls the drawing process occupies a large area, is difficult to repair and has a very high maintenance cost, it is not suitable for small and medium-sized enterprises. Therefore, more steel pipe drawing machines use chain drawing machines, but the existing chain drawing machines have some defects, such as:

1. For example, the publication number "CN201911148211.9 High-speed, high-precision belt drawing machine" transmits power through a pulley to draw the steel pipe. Although this method is easier to maintain and install than a hydraulically driven drawing machine, since chain drives such as belts or connecting chains have a polygonal effect, the transmission chain itself has an uneven speed. The transmission chain itself will vibrate or slip during movement, resulting in an unstable stretching effect of the steel pipe, which is not conducive to improving the yield rate of the product;

2. For example, in the publication number “CN201911148211.9 High-speed, high-precision belt drawing machine”, the feeding devices of the steel pipes of the belt drawing machine and the traditional chain drawing machine are often arranged in front of the fixed jaws, which will make the overall length of the drawing machine longer, which is not conducive to the installation of the drawing machine by the enterprise, and the belt drawing machine and the chain drawing machine cannot be continuously fed to increase the overall production rate of the drawing machine.

In view of the above problems, it is urgent to carry out innovative design based on the original drawing machine.

Summary of the invention

The object of the present invention is to provide a cantilever drawing machine to solve the problems of unstable drawing effect and inability to continuously feed materials mentioned in the above background technology.

To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cantilever drawing machine, comprising a box body, a feeding motor, a supporting rod, a sliding block and a receiving platform, the feeding motor is installed on the upper surface of the box body, and the outer surface of one side of the feeding motor is connected to the feeding rod, the outside of the feeding rod is connected to the feeding chamber, and the outer surface of the feeding chamber is penetrated by the clamping rod, and a clamping spring is connected between the clamping rod and the feeding chamber, the outer surface of the feeding chamber is installed with the clamping motor, and the outer surface of one side of the clamping motor is connected to the pushing rod, and the outer surface of the pushing rod is connected to the extrusion barrel, an ejection block is installed inside the feeding chamber, and the ejection spring is connected between the ejection block and the feeding chamber, a feeding motor is installed on the side surface of the box body, and the outer surface of one side of the feeding motor is connected to the feeding rod, and the outer surface of the feeding rod is provided with a feeding plate, and the outer surface of the box body is fixed There is a rolling plate, and a supporting plate is fixed on the outer surface of the box body, and a steel pipe main body is placed on the upper surface of the supporting plate, a power motor is installed on the outer surface of one side of the box body, and a driving gear is connected to the outer surface of one side of the power motor, the driving gear passes through the outer surface of the box body and is connected to a pushing rotating rod, and the outer surface of the pushing rotating rod is connected to a pushing block, the outer surface of the driving gear is connected to a driven gear, and one end of the driven gear is connected to a drawing rotating rod, and the outer surface of the drawing rotating rod is connected to a drawing block, a drawing motor is installed on the outer surface of the drawing block, and a screw is connected to the outer surface of one side of the drawing motor, and the screw passes through the outer surface of the drawing block and is connected to a pressing block, the inside of the drawing block is connected to a fixed block, and a fixing spring is connected between the fixed block and the drawing block, a sliding block is fixed on the side surface of the box body, and a material receiving platform is provided on the upper surface of the box body.

Preferably, the feeding chamber is symmetrically distributed about the cylindrical center line of the feeding rod, and the feeding chamber and the clamping rod form a sliding structure, and the clamping rod and the feeding chamber form an elastic structure through a clamping spring.

Preferably, the feeding chamber forms a rotating structure with the box body through the feeding rod, and the feeding chamber and the pop-up block form a sliding structure, and the pop-up block forms an elastic structure with the feeding chamber through the pop-up spring.

Preferably, the push rod and the feeding chamber form a rotating structure, the push rod and the extrusion barrel are threadedly connected, and the extrusion barrel and the feeding chamber form a sliding structure.

Preferably, the loading plates are equidistantly arranged on the outer surface of the loading rod, and the loading rod and the box body form a rotating structure, and rolling plates are equidistantly arranged on the outer surface of the box body, and the rolling plates are symmetrically distributed about the longitudinal center line of the loading plate.

Preferably, the pusher rotating rod forms a rotating structure with the box body through a driving gear, and the pusher rotating rod is threadedly connected to the pusher block, and the lower end of the pusher block is in contact with the outer surface of the supporting plate.

Preferably, the pulling block is threadedly connected to the pulling rotating rod, the pulling block and the pressing block form a sliding structure, and the pressing block is threadedly connected to the screw rod.

Preferably, a support plate is installed on the side surface of the box body, a support spring is connected between the support plate and the box body, and a support rod is arranged on the upper surface of the support plate.

Preferably, the support rods penetrate the outer surface of the sliding block, and the support rods are evenly spaced and distributed on the upper surface of the support plate, and the support plate forms an elastic structure with the box body through a support spring.

Compared with the prior art, the invention has the following beneficial effects: the cantilever drawing machine,

1. A drawing rod is provided, and the steel pipe body is drawn by rotating the drawing rod and driving the drawing block to slide. Since the threaded connection between the drawing rod and the drawing block is very firm and not prone to slipping, the drawing force on the steel pipe body is very stable, which is conducive to improving the drawing effect of the steel pipe body;

2. A feeding chamber is provided. The rotatable feeding chamber allows the drawing and feeding processes of the drawing machine to be carried out simultaneously. After the drawing of the steel pipe body in the feeding chamber on one side is completed, another steel pipe body has been pushed into the feeding chamber on the other side waiting for drawing, which greatly improves the working efficiency of the drawing machine;

3. A loading plate is provided, which rotates and drives the steel pipe body to move to the supporting plate to realize automatic loading. It only needs to place the steel pipe body on the upper surface of the rolling plate, and the casing is automatically loaded through the loading plate, which greatly reduces the labor intensity of the operator;

4. A support rod is provided, which slides upward to support the steel pipe body after drawing. Then, in the process of driving the steel pipe body to slide downward, the steel pipe body contacts the sliding block and breaks away from the contact with the support rod. The steel pipe body slides along the sliding block to the receiving table and waits for the staff to take it away, thereby achieving the purpose of automatic discharging.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall top sectional structure of the present invention;

FIG2 is a schematic diagram of a top cross-sectional view of the connection between the push rod and the push block of the present invention;

FIG3 is a schematic diagram of the overall front cross-sectional structure of the present invention;

FIG4 is a schematic diagram of the overall side sectional structure of the present invention;

FIG5 is a schematic diagram of the overall rear cross-sectional structure of the present invention;

FIG. 6 is an enlarged structural schematic diagram of point A in FIG. 1 of the present invention.

In the figure: 1. box body; 2. feeding motor; 3. feeding rod; 4. feeding chamber; 5. clamping rod; 6. clamping spring; 7. clamping motor; 8. pushing rod; 9. extrusion barrel; 10. pop-up block; 11. pop-up spring; 12. feeding motor; 13. feeding rod; 14. feeding plate; 15. rolling plate; 16. supporting plate; 17. steel pipe body; 18. power motor; 19. driving gear; 20. pushing rod; 21. pushing block; 22. driven gear; 23. pulling rod; 24. pulling block; 25. pulling motor; 26. screw; 27. pressing block; 28. fixing block; 29. fixing spring; 30. supporting plate; 31. supporting spring; 32. supporting rod; 33. sliding block; 34. receiving table.

Detailed ways

The following will be combined with the drawings in 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.

Please refer to Figures 1-6. The present invention provides a technical solution: a cantilever drawing machine, including a box body 1, a feeding motor 2, a feeding rod 3, a feeding chamber 4, a clamping rod 5, a clamping spring 6, a clamping motor 7, a push rod 8, an extrusion barrel 9, an ejection block 10, an ejection spring 11, a feeding motor 12, a feeding rod 13, a feeding plate 14, a rolling plate 15, a supporting plate 16, a steel pipe body 17, a power motor 18, a driving gear 19, a pushing rod 20, a pushing block 21, a driven gear 22, a drawing rod 23, a drawing block 24, a drawing motor 25, a screw 26, a pressing block 27, a fixing block 28, a fixing spring 29, A support plate 30, a support spring 31, a support rod 32, a sliding block 33 and a receiving platform 34, a feeding motor 2 is installed on the upper surface of the box body 1, and a feeding rod 3 is connected to the outer surface of one side of the feeding motor 2, a feeding chamber 4 is connected to the outside of the feeding rod 3, and the outer surface of the feeding chamber 4 is penetrated by a clamping rod 5, and a clamping spring 6 is connected between the clamping rod 5 and the feeding chamber 4, a clamping motor 7 is installed on the outer surface of the feeding chamber 4, and a push rod 8 is connected to the outer surface of one side of the clamping motor 7, and an extrusion barrel 9 is connected to the outer surface of the push rod 8, and an ejection block 10 is installed inside the feeding chamber 4, and the ejection block 10 is connected to the feeding chamber 4. A pop-up spring 11 is connected between the box body 1 and the box body 1, a feeding motor 12 is installed on the side surface of the box body 1, and a feeding rod 13 is connected to the outer surface of one side of the feeding motor 12, and a feeding plate 14 is arranged on the outer surface of the feeding rod 13, a rolling plate 15 is fixed to the outer surface of the box body 1, and a supporting plate 16 is fixed to the outer surface of the box body 1, and a steel pipe body 17 is placed on the upper surface of the supporting plate 16, a power motor 18 is installed on the outer surface of one side of the box body 1, and a driving gear 19 is connected to the outer surface of one side of the power motor 18, and the driving gear 19 passes through the outer surface of the box body 1 and is connected to a push rod 20, and the outer surface of the push rod 20 is connected to a push rod 20. The material block 21, the outer surface of the driving gear 19 is connected to the driven gear 22, and one end of the driven gear 22 is connected to the drawing rotating rod 23, and the outer surface of the drawing rotating rod 23 is connected to the drawing block 24, the outer surface of the drawing block 24 is installed with a drawing motor 25, and the outer surface of one side of the drawing motor 25 is connected to a screw rod 26, and the screw rod 26 passes through the outer surface of the drawing block 24 and is connected to a pressure block 27, the inside of the drawing block 24 is connected to a fixed block 28, and a fixed spring 29 is connected between the fixed block 28 and the drawing block 24, a sliding block 33 is fixed to the side surface of the box body 1, and a material receiving platform 34 is provided on the upper surface of the box body 1.

The feeding chamber 4 is symmetrically distributed about the cylindrical center line of the feeding rod 3, and the feeding chamber 4 and the clamping rod 5 form a sliding structure, and the clamping rod 5 forms an elastic structure with the feeding chamber 4 through the clamping spring 6. The clamping rod 5 slides and compresses the clamping spring 6 to clamp the steel pipe body 17 to prevent the steel pipe body 17 from falling out during the rotation of the feeding chamber 4.

The feeding chamber 4 forms a rotating structure with the box body 1 through the feeding rod 3, and the feeding chamber 4 and the pop-up block 10 form a sliding structure, and the pop-up block 10 forms an elastic structure with the feeding chamber 4 through the pop-up spring 11. The pop-up block 10 is squeezed by the steel pipe body 17 to compress the pop-up spring 11. When the feeding chamber 4 rotates to the drawing block 24, the pop-up spring 11 pushes one end of the steel pipe body 17 into the interior of the drawing block 24 through the pop-up block 10.

The push rod 8 and the feeding chamber 4 form a rotating structure, and the push rod 8 and the extrusion barrel 9 are threadedly connected, and the extrusion barrel 9 and the feeding chamber 4 form a sliding structure. The push rod 8 rotates and drives the extrusion barrel 9 to slide and squeeze the clamping rod 5 through the threaded connection with the extrusion barrel 9.

The loading plates 14 are equidistantly arranged on the outer surface of the loading rod 13, and the loading rod 13 and the box body 1 form a rotating structure, and the outer surface of the box body 1 is equidistantly arranged with rolling plates 15, and the rolling plates 15 are symmetrically distributed about the longitudinal center line of the loading plate 14. The rotation of the loading rod 13 drives the loading plate 14 to move the steel pipe body 17 placed on the upper surface of the rolling plate 15 to the upper surface of the supporting plate 16.

The pushing rod 20 forms a rotating structure with the box body 1 through the driving gear 19, and the pushing rod 20 is threadedly connected to the pushing block 21, and the lower end of the pushing block 21 is in contact with the outer surface of the supporting plate 16. The pushing rod 20 rotates and drives the pushing block 21 to push the steel pipe body 17 placed on the upper surface of the rolling plate 15 into the feeding chamber 4 through the threaded connection with the pushing block 21.

The drawing block 24 is threadedly connected to the drawing rotating rod 23, and the drawing block 24 and the pressing block 27 constitute a sliding structure, and the pressing block 27 is threadedly connected to the screw rod 26. The drawing rotating rod 23 rotates and drives the drawing block 24 to slide through the threaded connection with the drawing block 24. The pressing block 27 in the drawing block 24 slides and squeezes the fixed block 28 to clamp the steel pipe body 17 under the drive of the screw rod 26. The steel pipe body 17 is elongated as the drawing block 24 moves when both ends are clamped.

A support plate 30 is installed on the side surface of the box body 1, and a support spring 31 is connected between the support plate 30 and the box body 1, and a support rod 32 is arranged on the upper surface of the support plate 30, so that the steel pipe body 17 that has been drawn can be automatically unloaded.

The support rod 32 passes through the outer surface of the sliding block 33, and the support rods 32 are evenly spaced on the upper surface of the support plate 30, and the support plate 30 forms an elastic structure with the box body 1 through the support spring 31. The support rod 32 supports the steel pipe body 17 as the support plate 30 rises, and then the steel pipe body 17 contacts the sliding block 33 as the support rod 32 descends and slides along the sliding block 33 to the receiving platform 34 to wait to be taken away by the staff.

Working principle: When using the cantilever drawing machine, first connect the device to an external power supply, and then as shown in Figures 1, 2, 3, 4 and 6, place the steel pipe body 17 to be drawn on the upper surface of the rolling plate 15 on the side of the box body 1, then the feeding motor 12 is started, the feeding motor 12 drives the feeding rod 13 to rotate, the feeding rod 13 drives the feeding plate 14 to move the first steel pipe body 17 placed on the upper surface of the rolling plate 15 to the upper surface of the supporting plate 16 and prevent the second steel pipe body 17 placed on the upper surface of the rolling plate 15 from sliding, then the feeding motor 12 drives the feeding rod 13 to rotate in the opposite direction, and the feeding rod 13 drives the feeding rod 13 to rotate in the opposite direction to the initial position, at this time the upper surface of the rolling plate 15 The steel pipe body 17 placed on the surface slides downward and is blocked by the protrusion of the rolling plate 15, and will not slide onto the supporting plate 16. At this time, the power motor 18 rotates, and the power motor 18 drives the driving gear 19 to rotate forward. The driving gear 19 drives the pushing block 21 to slide in the direction close to the feeding chamber 4 through the pushing rotating rod 20. The pushing block 21 pushes the steel pipe body 17 until the steel pipe body 17 enters the interior of the feeding chamber 4 to squeeze the pop-up block 10 and compress the pop-up spring 11. At this time, the clamping motor 7 is started, and the clamping motor 7 drives the squeezing barrel 9 to squeeze the clamping rod 5 through the pushing rod 8. The clamping rod 5 slides toward the inside of the feeding chamber 4 and compresses the clamping spring 6 until the clamping rod 5 clamps the steel pipe body 17 inside the feeding chamber 4;

Then, as shown in Figures 2, 3, 5 and 6, the power motor 18 reverses to drive the push block 21 to move to the initial position, and at the same time, the driving gear 19 drives the drawing rod 23 to rotate through the driven gear 22, and the drawing rod 23 drives the drawing block 24 to move to the end of the drawing rod 23 close to the feeding chamber 4, and then the feeding motor 2 rotates, and the feeding motor 2 drives the feeding chamber 4 to rotate through the feeding rod 3, so that the two feeding chambers 4 exchange positions, and the empty feeding chamber 4 rotates to one side of the loading plate 14 to wait for loading, and the feeding chamber 4 equipped with the steel pipe body 17 rotates to the drawing block 24, at this time, the clamping motor 7 drives the push rod 8 to rotate in the opposite direction, and the push rod 8 drives the extrusion barrel 9 to release the extrusion of the clamping rod 5. The clamping rod 5 releases the clamping of the steel pipe body 17 under the drive of the compressed clamping spring 6. One end of the steel pipe body 17 enters the interior of the drawing block 24 under the drive of the compressed pop-up spring 11 through the pop-up block 10. At this time, the drawing motor 25 drives the pressing block 27 to slide inside the drawing block 24 through the screw 26 and squeeze the fixed block 28. The fixed block 28 compresses the fixed spring 29 and clamps one end of the steel pipe body 17;

Then, as shown in Figures 4-6, the power motor 18 drives the driven gear 22 to rotate through the driving gear 19, and the driven gear 22 drives the pulling block 24 to slide in the direction away from the feeding chamber 4 through the pulling rotating rod 23, until the end of the steel pipe body 17 located in the feeding chamber 4 is about to completely leave the feeding chamber 4, the clamping motor 7 drives the extrusion barrel 9 to squeeze the clamping rod 5 through the pushing rod 8, and the clamping rod 5 slides toward the inside of the feeding chamber 4 and compresses the clamping spring 6 until the clamping rod 5 clamps the steel pipe body 17 inside the feeding chamber 4. At this time, the two ends of the steel pipe body 17 are clamped by the fixed block 28 and the clamping rod 5 respectively, and the fixed block 28 is constantly moving with the pulling block 24, so the steel pipe The main body 17 completes the drawing operation under the pulling force of the fixed block 28 and the clamping rod 5. As shown in FIG5 , when the drawing block 24 moves to the downward depression of the support plate 30, the drawing block 24 temporarily releases the squeezing of the support plate 30, and the support rod 32 slides upward under the support of the support spring 31 and the support plate 30 and supports the steel pipe main body 17. Then, at this time, the clamping rod 5 first releases the clamping of the steel pipe main body 17. When the steel pipe main body 17 is completely out of the feeding chamber 4, the fixed block 28 releases the clamping of the steel pipe main body 17. The steel pipe main body 17 no longer moves with the drawing block 24 under the support of the support rod 32 until one end of the steel pipe main body 17 is completely out of the drawing block 24.

At this time, as shown in FIGS. 4-5 , the drawing block 24 has passed the lowest point of the depression of the support plate 30. As the drawing block 24 continues to move, the drawing block 24 squeezes the support plate 30, and the support plate 30 moves downward under pressure and drives the support rod 32 to move downward. During the downward movement of the support rod 32, the steel pipe body 17 is driven to contact the sliding block 33. After the sliding block 33 is completely out of contact with the support rod 32, it slides along the sliding block 33 to the upper surface of the receiving platform 34 to wait for the staff to take it away.

As shown in Figures 1-6, during the process of the drawing block 24 drawing the steel pipe body 17, the feeding motor 12 drives the feeding rod 13 to rotate, and the feeding rod 13 drives the feeding plate 14 to move the first steel pipe body 17 placed on the upper surface of the rolling plate 15 to the upper surface of the supporting plate 16, and the active gear 19 drives the pushing block 21 to slide in the direction close to the feeding chamber 4 through the pushing rotating rod 20, and the pushing block 21 pushes the steel pipe body 17 until the steel pipe body 17 enters the interior of the feeding chamber 4 to squeeze the pop-up block 10 and compress the pop-up spring 11. At this time, the clamping motor 7 is started, and the clamping motor 7 drives the extrusion barrel 9 to squeeze the clamping rod 5 through the pushing rod 8. The clamping rod 5 slides toward the inside of the feeding chamber 4 and compresses the clamping spring 6 until the clamping rod 5 clamps the steel pipe body 17 inside the feeding chamber 4, thereby realizing the purpose of automatic feeding of the drawing machine during the drawing process, thereby increasing the overall practicality.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A cantilever drawing machine, comprising a box body (1), a feeding motor (2), a support rod (32), a sliding block (33) and a receiving platform (34), characterized in that: a feeding motor (2) is installed on the upper surface of the box body (1), and a feeding rod (3) is connected to the outer surface of one side of the feeding motor (2), the outer surface of the feeding rod (3) is connected to a feeding chamber (4), and the outer surface of the feeding chamber (4) is penetrated by a clamping rod (5), and a clamping spring (6) is connected between the clamping rod (5) and the feeding chamber (4), and a clamping motor (7) is installed on the outer surface of the feeding chamber (4), and the clamping A push rod (8) is connected to the outer surface of one side of the tightening motor (7), and the outer surface of the push rod (8) is connected to the extrusion barrel (9); an ejection block (10) is installed inside the feeding chamber (4), and an ejection spring (11) is connected between the ejection block (10) and the feeding chamber (4); a feeding motor (12) is installed on the side surface of the box body (1), and a feeding rod (13) is connected to the outer surface of one side of the feeding motor (12), and a feeding plate (14) is arranged on the outer surface of the feeding rod (13); a rolling plate (15) is fixed to the outer surface of the box body (1), and the outer surface of the box body (1) A supporting plate (16) is fixed, and a steel pipe body (17) is placed on the upper surface of the supporting plate (16); a power motor (18) is installed on the outer surface of one side of the box body (1), and a driving gear (19) is connected to the outer surface of one side of the power motor (18); the driving gear (19) passes through the outer surface of the box body (1) and is connected to a material pushing rotating rod (20), and the outer surface of the material pushing rotating rod (20) is connected to a material pushing block (21); the outer surface of the driving gear (19) is connected to a driven gear (22), and one end of the driven gear (22) is connected to a pulling rotating rod (23), and the pulling rotating rod (23) is connected to the outer surface of the driving gear (19). The outer surface of the pulling rod (23) is connected to a pulling block (24), a pulling motor (25) is installed on the outer surface of the pulling block (24), and a screw (26) is connected to the outer surface of one side of the pulling motor (25), and the screw (26) passes through the outer surface of the pulling block (24) and is connected to a pressing block (27), the inside of the pulling block (24) is connected to a fixing block (28), and a fixing spring (29) is connected between the fixing block (28) and the pulling block (24), a sliding block (33) is fixed to the side surface of the box body (1), and a material receiving platform (34) is provided on the upper surface of the box body (1); The feeding chamber (4) is symmetrically distributed about the cylindrical center line of the feeding rod (3), and the feeding chamber (4) and the clamping rod (5) form a sliding structure, and the clamping rod (5) and the feeding chamber (4) form an elastic structure through a clamping spring (6); The feeding chamber (4) forms a rotating structure with the feeding rod (3) and the box body (1), and the feeding chamber (4) and the ejection block (10) form a sliding structure, and the ejection block (10) forms an elastic structure with the feeding chamber (4) through the ejection spring (11); The push rod (8) and the feeding chamber (4) form a rotating structure, the push rod (8) and the extrusion barrel (9) are threadedly connected, and the extrusion barrel (9) and the feeding chamber (4) form a sliding structure. 2. A cantilever drawing machine according to claim 1, characterized in that: the feeding plate (14) is equidistantly arranged on the outer surface of the feeding rod (13), and the feeding rod (13) and the box body (1) form a rotating structure, and the outer surface of the box body (1) is equidistantly arranged with rolling plates (15), and the rolling plates (15) are symmetrically distributed about the longitudinal center line of the feeding plate (14). 3. A cantilever drawing machine according to claim 1, characterized in that: the push rod (20) forms a rotating structure with the box body (1) through a driving gear (19), and the push rod (20) is threadedly connected to the push block (21), and the lower end of the push block (21) is in contact with the outer surface of the support plate (16). 4. A cantilever drawing machine according to claim 1, characterized in that: the drawing block (24) and the drawing rotating rod (23) are threadedly connected, and the drawing block (24) and the pressing block (27) constitute a sliding structure, and the pressing block (27) and the screw rod (26) are threadedly connected. 5. A cantilever drawing machine according to claim 1, characterized in that: a support plate (30) is installed on the side surface of the box body (1), and a support spring (31) is connected between the support plate (30) and the box body (1), and a support rod (32) is arranged on the upper surface of the support plate (30). 6. A cantilever drawing machine according to claim 5, characterized in that: the support rod (32) passes through the outer surface of the sliding block (33), and the support rods (32) are evenly spaced and distributed on the upper surface of the support plate (30), and the support plate (30) forms an elastic structure with the box body (1) through the support spring (31).