Drawing machine for copper pipe head manufacturing

Abstract

The invention discloses a drawing machine for copper pipe head processing, which relates to the technical field of copper pipe processing and comprises a drawing machine tool, a chain rail arranged on one side of the drawing machine tool and a moving frame movably arranged on the chain rail. The clamp trolley is fixed in the middle of the moving frame, the quick-acting assembly is arranged in the clamp trolley and suddenly moves backwards by utilizing the impact force of copper pipe breakage, and the secondary clamping assembly is arranged on one side of the clamp trolley and is pulled by the quick-acting assembly to make contact with the copper pipe quickly and powerfully. Impact force generated by breakage of the copper pipe in the drawing process is ingeniously utilized, self-adaptive secondary clamping of the copper pipe is achieved, simple secondary head manufacturing is carried out on the premise that flow is not cut off and die withdrawing is not carried out, drawing work continues, the risk that copper pipe drawing work is interrupted due to sudden breakage of a head manufacturing part is also reduced, and the production efficiency of the copper pipe is improved. And the drawing efficiency is further improved.

Description

Technical Field

[0001] This invention relates to the field of copper tube processing technology, specifically a drawing machine for processing copper tube heads. Background Technology

[0002] Copper tube drawing, a core cold working method for precision copper tube forming, involves forcing a pre-treated copper tube blank through a drawing die with progressively smaller cross-sectional dimensions at room temperature or low temperature under axial tension. This results in plastic deformation, achieving precise reduction in outer diameter, controllable adjustment of wall thickness, and length extension. This process significantly improves the dimensional accuracy, surface finish, and mechanical properties of copper tubes, and effectively enhances the material's microstructure uniformity, making it a key technology for producing high-performance, high-value-added copper tube products. To ensure smooth initiation and continuous drawing, the copper tube end must be pre-processed to form a robust, appropriately sized traction head; this process is called head preparation. The head must be smaller than the minimum cross-sectional dimension of the drawing die. After passing through the die, the head is clamped and forcibly pulled by a clamping carriage.

[0003] However, the head-making process softens the copper tube head material due to localized forging, resulting in slightly lower mechanical properties than the original tube body. During the drawing process, the clamping carriage applies continuous axial tensile force, making the head-making area a stress concentration point. Especially in the transition zone between the head and the tube body, fracture may occur due to strength mismatch. If fracture occurs in the later stages of drawing, because the copper tube has completely penetrated the mold and the remaining tube section is long, a second head-making cannot be performed without interrupting flow and demolding. At this point, the clamping carriage continues to pull according to the set program, causing the copper tube to lose effective clamping, ultimately leading to drawing interruption, process failure, and loss of materials and time.

[0004] To address the aforementioned issues, there is an urgent need for innovative design based on the existing drawing machine used for processing copper tube heads. Summary of the Invention

[0005] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the present invention aims to provide a drawing machine for processing copper tube heads, thereby solving the problem mentioned in the background that the copper tube breaks during the later stages of drawing, resulting in the copper tube losing its effective clamping.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a drawing machine for processing copper tube heads, comprising a drawing machine tool, a chain rail disposed on one side of the drawing machine tool, and a movable frame movably disposed on the chain rail, and further comprising: The clamping cart is fixed in the middle of the moving frame; the quick-acting component is set in the clamping cart to move backward rapidly using the impact force of the copper pipe breaking; and the secondary clamping component is set on one side of the clamping cart to quickly and forcefully contact the copper pipe by being pulled by the quick-acting component. The speed-actuating component includes several sets of empty cylindrical rails fixed in proportion inside the clamping vehicle, a fixed component movably disposed inside the empty cylindrical rails, and a ball rotatably disposed in the middle of the fixed component. The secondary clamping assembly includes several sets of pull rods that are proportionally and movably inserted on one side of the clamping vehicle, a second track fixed to the outer wall of one side of the clamping vehicle, and a first track fixed to one end of the pull rods.

[0007] Preferably, a main clamping assembly is provided in the middle of the clamping vehicle; The sidewall of the clamping vehicle is provided with several sets of square grooves in equal proportion; The side wall of the clamping vehicle is fixed with a fixing plate at the corresponding position of each set of square slots, and a baffle is hinged to one end of the fixing plate. The baffle is L-shaped, and one end of the baffle extends through the square groove into the interior of the empty cylindrical rail; Both sides of the other end of the baffle are movably fitted with tension springs, and the other end of the tension springs is movably fitted on the outer wall of the clamping vehicle.

[0008] Preferably, the quick-acting assembly further includes unidirectional teeth symmetrically fixed to the middle section of the inner wall of the empty cylindrical rail; The unidirectional tooth is composed of several sets of triangular blocks arranged in a linear array with equal proportions. The inclined surface of each set of triangular blocks faces the direction of the drawing machine tool and the reverse side faces the direction of the drawing machine tool. Limit buckles are provided on both sides of the fastener via a pivot. The shaft is movably fitted with a torsion spring, and the two ends of the torsion spring are respectively pressed against one side of the limit buckle and the inner wall of the fixing member. One end of the limiting buckle is configured as a right-angled triangle adapted to the one-way tooth, and the inclined surface of the right-angled triangle faces away from the direction of the drawing machine tool. The right-angled triangle is movably inserted in the middle of several sets of triangular blocks.

[0009] Preferably, one end of each set of pull rods passes through a clamping machine and is fixedly connected to a fixing member; Several sets of the tie rods are fixedly connected by a No. 1 connecting ring.

[0010] Preferably, the secondary clamping assembly further includes a slider that is simultaneously movably inserted into the middle of one end of the second track and the middle of the first track; One end of the slider is fixed with a long rod, and the other end of the long rod is fixed with a clamping plate; The clamping plate is provided with several groups arranged in a proportional array according to the circular axis; An anti-slip rubber pad is fixedly adhered to one side of the clamping plate.

[0011] Preferably, the second track consists of a square rod vertically fixed to one side of the clamping vehicle and a track rod vertically fixed to the other end of the square rod; The track rod is parallel to one side of the outer wall of the clamping vehicle; The No. 1 track forms a 45° angle with the track pole.

[0012] Preferably, the length of the long rod is greater than the length of the track rod at the other end of the second track; The total length of the long rod and the other end of the second track rod is greater than the outer diameter of the clamping vehicle.

[0013] Preferably, a groove is provided at one end of the pull rod near the first track; The inside of the chute is equipped with pull bolts that are movably installed via an I-shaped track.

[0014] Preferably, the pull bolts are provided in several groups arranged in a proportional array along the circular axis; Several sets of bolts are fixedly connected by a second connecting ring.

[0015] Preferably, a steel wire rope is movably inserted inside the pull rod; One end of the steel wire rope passes through the pull rod and is divided into two strands, which are respectively fixedly connected to two sets of symmetrically distributed limit buckles. The other end of the wire rope extends into the groove and is fixedly connected to the bolt.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In this invention, when the copper tube breaks during the drawing process, the resulting impact force forces the rolling ball to break through the baffle and drives the pull rod to pull sharply at a speed significantly faster than the clamping machine. This causes several sets of clamping plates to simultaneously converge towards the center, achieving secondary clamping of the copper tube. Furthermore, due to the large impact force, the clamping plates also exert a certain impact force on the copper tube as they converge, resulting in a secondary head formation, which facilitates a more secure clamping of the copper tube by the clamping plates. This invention cleverly utilizes the impact force generated by the copper tube breaking during the drawing process to achieve adaptive secondary clamping of the copper tube. It enables simple secondary head formation without interrupting flow or demolding, allowing the drawing process to continue. It also reduces the risk of interruption in the copper tube drawing process due to sudden head breakage, further improving the efficiency of the drawing operation.

[0017] Note: The breakage of the copper tube head midway is a sudden and accidental event. Although the secondary head-making process of the copper tube in this invention is relatively rough and simple, it is sufficient to deal with unexpected situations. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the first three-dimensional structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the initial state structure of part of the present invention.

[0020] Figure 3 This is a schematic diagram of the working state structure of the present invention.

[0021] Figure 4 This is a partial structural diagram of the present invention.

[0022] Figure 5 This is a schematic diagram of the cross-sectional rear view of the clamping machine of the present invention.

[0023] Figure 6 This is a rear view structural diagram of the rolling ball in working state according to the present invention.

[0024] Figure 7 This is a schematic diagram of the unidirectional tooth structure of the present invention.

[0025] Figure 8 This is a partial side view of the structure of the present invention.

[0026] Figure 9 For the present invention Figure 8 A magnified three-dimensional structural diagram of A in the middle.

[0027] Figure 10 This is a schematic diagram of the torsion spring of the present invention.

[0028] Figure 11 This is a schematic diagram of the structure of track number one and track number two of the present invention.

[0029] Figure 12 This is a schematic diagram of the steel wire rope of the present invention.

[0030] In the diagram: 1. Drawing machine; 2. Chain rail; 3. Moving frame; 4. Clamping carriage; 5. Tie rod; 6. Track 1; 7. Main clamping assembly; 8. Track 2; 9. Long rod; 10. Clamping plate; 11. Slider; 12. Empty cylinder rail; 13. One-way tooth; 14. Fixing plate; 15. Baffle; 16. Tension spring; 17. Fixing component; 18. Ball bearing; 19. Limit buckle; 20. Torsion spring; 21. Wire rope; 22. Connecting ring 1; 23. Connecting ring 2; 24. Slide groove; 25. Tie bolt. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 12 The present invention provides a technical solution: a drawing machine for processing copper tube heads, comprising a drawing machine tool 1, a chain rail 2 disposed on one side of the drawing machine tool 1, and a movable frame 3 movably disposed on the chain rail 2, and further comprising: The clamping carriage 4 is fixed in the middle of the moving frame 3, the quick-moving component is set in the clamping carriage 4 to move back quickly using the impact force of the copper pipe breaking, and the secondary clamping component is set on one side of the clamping carriage 4 to quickly and forcefully contact the copper pipe by being pulled by the quick-moving component. In specific implementation, the drawing machine tool 1, the chain rail 2 and the moving frame 3 are existing mature technologies. Their specific components, connection relationships and operation methods are consistent with the existing technologies. This invention will not elaborate on them further.

[0033] The quick-action assembly includes several sets of empty cylindrical rails 12 that are fixed in proportion inside the clamping car 4, a fixing member 17 that is movably disposed inside the empty cylindrical rails 12, and a ball bearing 18 that is rotatably disposed in the middle of the fixing member 17. In practical implementation, in order to ensure that several sets of clamping plates 10 have sufficient clamping force on the copper tube, the travel of the ball 18 must be long enough. Simply put, the ball 18 moves by impact force. If the length of the one-way tooth 13 is too short, the ball 18 will no longer be constrained by the one-way tooth 13 when it moves to the end of the one-way tooth 13, which may cause it to retreat and cause the clamping plate 10 to fail. Therefore, it is necessary to ensure that when the clamping plate 10 clamps the copper tube with the smallest diameter, the limit buckle 19 is still constrained by the one-way tooth 13. The specific length of the one-way tooth 13 can be selected according to the requirements. In addition, it should be noted that the length of the empty cylinder rail 12 also needs to be reserved enough so that the limit buckle 19 can be separated from the one-way tooth 13 under the influence of normal manual pushing force, so that when the steel wire rope 21 is pulled later, the limit buckle 19 can retract into the fixed part 17.

[0034] The secondary clamping assembly includes several sets of pull rods 5 that are proportionally and movably inserted on one side of the clamping vehicle 4, a second track 8 fixed to the outer wall of one side of the clamping vehicle 4, and a first track 6 fixed to one end of the pull rods 5.

[0035] The clamping vehicle 4 has a main clamping assembly 7 in the middle; In practical implementation, the main clamping assembly 7 consists of multiple components such as clamping plates, springs, and linkages. The specific components and connections are consistent with existing technologies, and will not be described in detail here. When the copper tube is not broken, the main clamping assembly 7 always securely clamps the end of the copper tube, and the entire operation process of the device is consistent with that of existing technologies.

[0036] The side wall of the clamping vehicle 4 is provided with several sets of square grooves in proportion. A fixing plate 14 is fixed to the side wall of the clamping vehicle 4 at the corresponding position of each set of square slots, and a baffle 15 is hinged to one end of the fixing plate 14. The baffle 15 is L-shaped, and one end of the baffle 15 extends through the square groove into the interior of the empty cylindrical rail 12; Both sides of the other end of the baffle 15 are movably fitted with tension springs 16, and the other end of the tension springs 16 is movably fitted on the outer wall of the clamping vehicle 4.

[0037] In specific implementation, the angle at the bend of the baffle 15 is greater than 90 degrees, and the bend of the baffle 15 is hinged to one end of the fixed plate 14, as shown in the attached figure. Figure 5 and attached Figure 6 As shown, the tension spring 16 is initially tilted. One end of the tension spring 16 is movably connected to the other end of the baffle 15. After the ball 18 impacts one end of the baffle 15, the baffle 15 is forced to rotate and stretches the tension spring 16. When the baffle 15 rotates to a certain angle, the tilting direction of the tension spring 16 changes, for example, from tilting to the right to tilting to the left. At this time, the stretched tension spring 16 rebounds again and pulls the baffle 15 in the opposite direction, causing the baffle 15 to tilt rapidly in the other direction. In this way, after the ball 18 breaks through the obstruction of the baffle 15, the baffle 15 will quickly stop interfering with the movement of the ball 18.

[0038] The quick-acting assembly also includes one-way teeth 13 symmetrically fixed to the middle section of the inner wall of the empty cylindrical rail 12; In practical implementation, it is important to note that the end of the one-way tooth 13 furthest from the clamping plate 10 should not extend to the rear end of the empty cylindrical rail 12. In other words, sufficient space must be left at the rear end of the empty cylindrical rail 12 for the normal movement of the limit buckle 19. When the limit buckle 19 moves into this space, it is not constrained by the one-way tooth 13. This design is to allow the limit buckle 19 to retract into the fixing member 17 under the pull of the wire rope 21 during the later pullback of the rolling ball 18. The unidirectional tooth 13 is composed of several sets of triangular blocks arranged in a linear array with equal proportions. The inclined surface of each set of triangular blocks faces the direction of the drawing machine tool 1 and the back faces the direction of the drawing machine tool 1. Limit buckles 19 are provided on both sides of the fastener 17 via a pivot column; A torsion spring 20 is movably sleeved on the outside of the shaft column, and the two ends of the torsion spring 20 are respectively pressed against one side of the limit buckle 19 and the inner wall of the fixing member 17. One end of the limit buckle 19 is set as a right-angled triangle that is compatible with the one-way tooth 13, and the inclined surface of the right-angled triangle faces away from the drawing machine tool 1. The right-angled triangle is movably inserted in the middle of several sets of triangular blocks.

[0039] In practical implementation, the main function of the torsion spring 20 is to drive the limit buckle 19 to quickly reset when it rotates due to the obstruction of the one-way tooth 13. That is, once the limit buckle 19 is no longer constrained by the one-way tooth 13, it can quickly return to the position shown in the attached figure. Figure 9 The initial state shown is intended to ensure that when the limit buckle 19 moves between any two sets of triangular blocks, the limit buckle 19 is aligned with the straight surface of the triangular blocks, thus preventing the fixing member 17 from moving back. In other words, if the copper tube breaks, the ball 18 will move suddenly away from the drawing machine tool 1 until several sets of clamping plates 10 tightly clamp the copper tube. During this process, the ball 18 will not move back, causing the secondary clamping to fail.

[0040] One end of each set of pull rods 5 passes through the clamping car 4 and is fixedly connected to the fixing part 17; In practice, when the fixing part 17 is suddenly accelerated due to the impact force of the copper tube breaking, it will drive the pull rod 5 to move synchronously away from the drawing machine tool 1. The displacement of the pull rod 5 can make several sets of clamping plates 10 quickly converge towards the center to achieve the final secondary clamping purpose.

[0041] Several sets of tie rods 5 are fixedly connected by a first connecting ring 22.

[0042] In practical implementation, under the connection of the first connecting ring 22, several sets of tie rods 5 can move synchronously. Note: There may be a time difference in the movement of several sets of tie rods 5 due to factors such as uneven component materials and impact force. However, the first connecting ring 22 can greatly reduce the time difference. Although complete synchronization may not be possible, the time difference in movement within a reasonable range can be ignored and will not have a serious impact on the operation of the device.

[0043] The secondary clamping assembly also includes a slider 11 that is simultaneously movably inserted into the middle of one end of the second track 8 and the middle of the first track 6; In practice, the slider 11 is affected by both the second track 8 and the first track 6. On the one hand, when the first track 6 is stationary, the slider 11 will not slide off the second track 8 due to the limit of the first track 6. On the other hand, when the first track 6 is moving, the slider 11 will move along the trajectory of the second track 8, not along the trajectory of the first track 6. In this way, when the pull rod 5 is pulled back, several sets of clamping plates 10 can converge in a direction different from the direction of movement of the pull rod 5, that is, towards the copper tube.

[0044] One end of the slider 11 is fixed with a long rod 9, and the other end of the long rod 9 is fixed with a clamping plate 10; The clamping plate 10 is provided with several groups arranged in a proportional array according to the circular axis; An anti-slip rubber pad is fixedly adhered to one side of the clamping plate 10.

[0045] In practice, the center of the circle formed by several sets of clamping plates 10, the center of the circle, the center of the clamping plate in the main clamping assembly 7, and the center of the mold hole in the drawing machine tool 1 must be on the same horizontal line.

[0046] Track 8 consists of a square rod vertically fixed to one side of the clamping vehicle 4 and a track rod vertically fixed to the other end of the square rod; The track rod is parallel to one side of the outer wall of the clamping vehicle 4; The No. 1 track 6 forms a 45° angle with the track pole.

[0047] The length of long rod 9 is greater than the length of the other end of track rod 8 of track 2; The total length of the long rod 9 and the other end of the track rod of the second track 8 is greater than the outer diameter of the clamping vehicle 4.

[0048] In practice, the travel of the clamping plate 10, or the maximum difference in the diameter of the circle formed by several sets of clamping plates 10, depends on the total length of the long rod 9 and the track rod at the other end of the second track 8. A long rod 9 of appropriate length can ensure that the diameter of the circle formed by several sets of clamping plates 10 can better fit the copper pipe with a smaller diameter.

[0049] A groove 24 is provided at one end of the pull rod 5 near the first track 6; The inside of the slide 24 is equipped with a pull bolt 25 that moves along an I-shaped track.

[0050] In specific implementation, as shown in the appendix Figure 12 As shown, the bolt 25 can slide smoothly along the inside of the slide groove 24 under the action of the I-shaped track, and will not detach from the inside of the slide groove 24.

[0051] The bolt 25 is provided with several groups arranged in a proportional array according to the circular axis; Several sets of bolts 25 are fixedly connected by the second connecting ring 23.

[0052] In practice, when the pull bolt 25 needs to be manually pulled, it can be directly pulled by the second connecting ring 23 to drive several sets of pull bolts 25 to move together, so as to simultaneously unlock several sets of one-way teeth 13 and limit buckles 19.

[0053] A steel wire rope 21 is inserted into the internal movable part of the pull rod 5; One end of the steel wire rope 21 passes through the pull rod 5 and is divided into two strands, which are respectively fixedly connected to two sets of symmetrically distributed limit buckles 19; The other end of the wire rope 21 extends into the groove 24 and is fixedly connected to the bolt 25.

[0054] In practice, after the previous set of copper tubes breaks, the secondary clamping component is triggered to work. Later, the limit buckle 19 is manually pushed away from the one-way tooth 13, and then the steel wire rope 21 is pulled by manually pulling the second connecting ring 23, so that the limit buckle 19 and the right angle surface of the one-way tooth 13 no longer correspond, making it easier to pull the ball 18 back to its original position.

[0055] Working Principle: When using this copper tube drawing machine for tube end processing, the copper tube is first drawn according to the existing process. During the drawing process, the entire system is in a tense state of force balance. When the copper tube suddenly breaks during the drawing process, the resulting impact force will not significantly affect the electrically controlled clamp carriage 4 and the main clamp assembly 7 which is reliably fixed to the clamp carriage 4. However, the moving parts inside the clamp carriage 4, such as the ball 18, will be subjected to a net impact force away from the drawing machine tool 1. This is similar to when one side suddenly lets go during a tug-of-war, the other side will be affected by the impact force and suddenly accelerate backward. The ball 18 will suddenly move backward sharply. This impact force is enough to break through the constraint of the baffle 15. Under the rebound of the tension spring 16, the baffle 15 will eventually quickly flip its direction and disengage from the ball 18. The ball 18 continues to be affected by the impact force, causing the fixing part 17 and the pull rod 5 to move backward. The limit buckle 19 is in one direction. The tube rotates and retracts into the fixing part 17 under the obstruction of the tooth 13, and then continuously resets under the rebound of the torsion spring 20. When the pull rod 5 drives the first track 6 to move backward quickly, the slider 11, under the influence of the trajectory of the first track 6 and the second track 8, drives the long rod 9 and the clamping plate 10 to quickly close together at the center. Several sets of clamping plates 10 finally smash against the outer wall of the copper tube and tightly clamp the copper tube. The impact of the clamping plate 10 will compress the head of the copper tube again, completing a new head forming, making the friction between the copper tube and the clamping plate 10 greater. Once the clamping plate 10 can no longer close together, the pull rod 5 and the ball 18 can no longer move backward. The movement of the ball 18 comes to an abrupt stop. Under the constraint of the one-way tooth 13, the limit buckle 19 cannot return to its original position, so the ball 18 cannot move back to the drawing machine tool 1. Finally, the clamping plate 10 maintains the state of tightly clamping the end of the copper tube, and the whole system continues to draw the copper tube at a uniform speed.

[0056] After the broken copper tube is pulled out, the first connecting ring 22 can be pushed away from the pulling machine tool 1, so that the pull rod 5 and the ball 18 continue to move backward until the limit buckle 19 is completely separated from the one-way tooth 13. Then, the second connecting ring 23 is pulled closer to the pulling machine tool 1, so that the pull bolt 25 pulls the limit buckle 19 through the wire rope 21, so that the limit buckle 19 retracts into the fixed part 17. Finally, the second connecting ring 23 and the first connecting ring 22 are pulled at the same time until the ball 18 returns to the initial position. Then, the baffle 15 is moved to return the baffle 15 to the initial state, that is, the state of blocking the ball 18.

[0057] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drawing machine for processing copper tube heads, comprising a drawing machine tool (1), a chain rail (2) disposed on one side of the drawing machine tool (1), and a movable frame (3) movably disposed on the chain rail (2), characterized in that, Also includes: The clamping cart (4) is fixed in the middle of the moving frame (3), the quick-moving component is set in the clamping cart (4) to move quickly and forcefully by the impact force of the copper pipe breaking, and the secondary clamping component is set on one side of the clamping cart (4) to be pulled quickly and forcefully to contact the copper pipe by the quick-moving component. The speed-actuated assembly includes several sets of empty cylindrical rails (12) fixed in proportion inside the clamping vehicle (4), a fixing member (17) movably disposed inside the empty cylindrical rails (12), and a ball (18) rotatably disposed in the middle of the fixing member (17). The secondary clamping assembly includes several sets of pull rods (5) that are proportionally and movably inserted on one side of the clamping vehicle (4), a second track (8) fixed on the outer wall of one side of the clamping vehicle (4), and a first track (6) fixed on one end of the pull rods (5).

2. The drawing machine for processing copper tube heads according to claim 1, characterized in that: The clamping vehicle (4) has a main clamping assembly (7) in the middle. The side wall of the clamping vehicle (4) is provided with several sets of square grooves in equal proportion; The side wall of the clamping vehicle (4) is fixed with a fixing plate (14) at the corresponding position of each set of square slots, and a baffle (15) is hinged to one end of the fixing plate (14). The baffle (15) is L-shaped, and one end of the baffle (15) extends through the square groove into the interior of the empty cylindrical rail (12); Both sides of the other end of the baffle (15) are movably fitted with tension springs (16), and the other end of the tension springs (16) is movably fitted on the outer wall of the clamping vehicle (4).

3. The drawing machine for processing copper tube heads according to claim 1, characterized in that: The speed-actuating component also includes unidirectional teeth (13) symmetrically fixed in the middle section of the inner wall of the empty cylindrical rail (12). The unidirectional tooth (13) is composed of several sets of triangular blocks arranged in a linear array with equal proportions. The inclined surface of each set of triangular blocks faces the direction of the drawing machine (1) and the back faces the direction of the drawing machine (1). Limit buckles (19) are provided on both sides of the fastener (17) via a pivot. The shaft is movably sleeved with a torsion spring (20), and the two ends of the torsion spring (20) are respectively pressed against one side of the limit buckle (19) and the inner wall of the fixing member (17); One end of the limiting buckle (19) is set as a right-angled triangle adapted to the one-way tooth (13), and the inclined surface of the right-angled triangle faces away from the drawing machine (1). The right-angled triangle is movably inserted in the middle of several sets of triangular blocks.

4. The drawing machine for processing copper tube heads according to claim 1, characterized in that: One end of each set of pull rods (5) passes through the clamping machine (4) and is fixedly connected to the fixing member (17); Several sets of the pull rods (5) are fixedly connected by a No. 1 connecting ring (22).

5. A drawing machine for processing copper tube heads according to claim 1, characterized in that: The secondary clamping assembly also includes a slider (11) that is simultaneously movably inserted into the middle of one end of the second track (8) and the middle of the first track (6). One end of the slider (11) is fixed with a long rod (9), and the other end of the long rod (9) is fixed with a clamping plate (10). The clamping plate (10) is provided with several groups arranged in a proportional array according to the circular axis; An anti-slip rubber pad is fixedly adhered to one side of the clamping plate (10).

6. A drawing machine for processing copper tube heads according to claim 1, characterized in that: The second track (8) consists of a square rod vertically fixed to one side of the clamping vehicle (4) and a track rod vertically fixed to the other end of the square rod; The track rod is parallel to one side of the outer wall of the clamping vehicle (4); The first track (6) forms a 45° angle with the track pole.

7. A drawing machine for processing copper tube heads according to claim 5, characterized in that: The length of the long rod (9) is greater than the length of the rail rod at the other end of the second track (8); The total length of the long rod (9) and the other end of the second track (8) is greater than the outer diameter of the clamping vehicle (4).

8. A drawing machine for processing copper tube heads according to claim 1, characterized in that: A groove (24) is provided at one end of the pull rod (5) near the first track (6); The inside of the chute (24) is equipped with a pull bolt (25) that moves along an I-shaped track.

9. A drawing machine for processing copper tube heads according to claim 8, characterized in that: The bolts (25) are provided with several groups arranged in a circular axis in equal proportion; Several sets of the bolts (25) are fixedly connected by the second connecting ring (23).

10. A drawing machine for processing copper tube heads according to claim 1, characterized in that: A steel wire rope (21) is movably inserted inside the pull rod (5); One end of the wire rope (21) passes through the pull rod (5) and is divided into two strands, which are respectively fixedly connected to two sets of symmetrically distributed limit buckles (19); The other end of the wire rope (21) extends into the groove (24) and is fixedly connected to the bolt (25).

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