A drawing device for processing seamless internally threaded copper tubes

Abstract

The present invention relates to the technical field of copper tube processing and drawing, and particularly relates to a drawing device for processing seamless internally threaded copper tubes, including a bottom plate. One side of the top of the bottom plate is fixedly connected with a fixing plate, and a drawing die is fixedly connected to the fixing plate. A lubricating mechanism and a cooling mechanism are arranged on the fixing plate. Opposite sides of the fixing plate on the top of the bottom plate are fixedly connected with vertical side plates, and a drawing mechanism is arranged on the two vertical side plates. A buffer feeding mechanism is arranged inside the bottom plate corresponding to the vertical side plates and the fixing plate; the lubricating mechanism includes a rotating ring, and an annular groove is formed on the outer wall of the rotating ring, and a plurality of circular holes are penetrated through the annular groove; the present invention can reduce the friction during the drawing process, reduce the wear of the drawing die and the seamless internally threaded copper tube, and make the drawing force evenly distributed on the outer surface of the seamless internally threaded copper tube, ensuring the drawing efficiency and drawing quality of the seamless internally threaded copper tube.

Description

Technical Field

[0001] The present invention relates to the technical field of copper tube processing and drawing, and particularly relates to a drawing device for processing seamless internally threaded copper tubes. Background Art

[0002] A drawing device for processing seamless internally threaded copper tubes is a plastic forming device that pulls a metal billet through a die hole by means of tensile force to obtain a product with the same size and shape as the die hole. It is mainly used for the drawing and forming of seamless internally threaded copper tubes. By changing the shape and size of the die, internally threaded copper tubes of different specifications can be drawn.

[0003] Currently, in the prior art, during the drawing process of seamless internally threaded copper tubes, a lubricating liquid is sprayed on their surfaces, and a spray head is used for spraying during the spraying process. Generally, the spray head is fixedly installed. This results in multiple areas on the outer wall of the seamless internally threaded copper tube between the spray heads where the outer surface is not sprayed with the lubricating liquid or the amount of sprayed lubricating liquid is less. Therefore, the friction force at the gap during the drawing process is relatively large. This not only increases the energy consumption during the drawing process but also may accelerate the wear of the drawing die and the copper tube. Also, due to the uneven distribution of the lubricating liquid, the drawing force is also unevenly distributed on the surface of the copper tube. This uneven drawing force may cause the copper tube to deform, twist, or even break during the drawing process, thus affecting the drawing efficiency and quality of the steel tube. In the drawing process, if the supply of the lubricating liquid is interrupted, it will have an adverse impact on the subsequent drawing quality. At the same time, during the drawing operation, contact occurs between the steel tube and the drawing die, so a large amount of heat is generated, resulting in a significant temperature rise. This excessively high temperature will damage the lubricating liquid, causing it to lose its lubricating efficacy.

[0004] In addition, when a seamless internally threaded copper tube is drawn to an end, the seamless internally threaded copper tube is directly dropped onto the placement rack. When the seamless internally threaded copper tube drops onto the placement rack, it collides with the placement rack, so dents, deformations, and scratches will occur on the outer surface of the seamless internally threaded copper tube, affecting subsequent use. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies in the background art and propose a drawing device for processing seamless internally threaded copper tubes.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: A drawing device for processing seamless internally threaded copper tubes includes a bottom plate. One side of the top end of the bottom plate is fixedly connected with a fixed plate. A drawing die is fixedly connected to the fixed plate. A lubricating mechanism and a cooling mechanism are arranged on the fixed plate. Opposite to both sides of the fixed plate on the top end of the bottom plate, vertical side plates are fixedly connected. A drawing mechanism is arranged on the two vertical side plates. A buffer and feeding mechanism is arranged on the top end of the bottom plate corresponding to the inner sides of the vertical side plates and the fixed plate.

[0007] The lubrication mechanism includes a rotating ring. An annular groove is formed on the outer wall of the rotating ring, and a plurality of circular holes are provided through the annular groove. An annular wiping sponge is fixedly connected to the inner wall of the rotating ring. The annular wiping sponge is in contact with the plurality of circular holes. The plurality of circular holes are used for the circulation of the lubricating liquid and penetration into the annular wiping sponge, and the annular wiping sponge is used for evenly applying the lubricating liquid on the outer wall of the seamless internal thread copper tube;

[0008] The cooling mechanism includes a cooling cavity formed between the fixed plate and the drawing die. The lubricating liquid in the cooling cavity is used to cool the drawing die to prevent the temperature of the drawing die from being too high during the drawing process. The fixed plate is fixedly penetrated with a liquid outlet pipe, and the other end of the liquid outlet pipe is fixedly connected to a hose. The hose is fixedly connected to the vertical side plate. The cooling mechanism further includes a roller, and the roller rolls and squeezes the lubricating liquid in the hose to keep the lubricating liquid in the cooling cavity in a flowing state.

[0009] Preferably, the lubrication mechanism further includes a fixed ring rotatably connected to the inner wall of the annular groove. Both sides of the outer wall of the fixed ring are fixedly connected with L-shaped plates, and both L-shaped plates are fixedly connected to the fixed plate. A second motor is fixedly connected to one of the L-shaped plates. The driving end of the second motor is fixedly connected to a gear through a driving shaft. The outer diameter of the gear is meshed with an external gear ring, and the external gear ring is fixedly connected to the rotating ring.

[0010] Preferably, the lubrication mechanism further includes a connecting pipe fixedly connected to the top end of one of the vertical side plates. The connecting pipe is fixedly connected to the hose and the fixed ring. The diameter of the connecting pipe gradually decreases in the direction close to the fixed ring, so that the flow rate of the lubricating liquid is accelerated. The other side of the cooling cavity is fixedly penetrated with a liquid inlet pipe, and a collection box is fixedly connected to the top of the bottom plate corresponding to the lower part of the rotating ring.

[0011] Preferably, the drawing mechanism includes sliding grooves formed at the mutually close ends of the vertical side plates. A first slider and a second slider are respectively slidably connected to the inner walls of the two sliding grooves. A stretching device is fixedly connected between the first slider and the second slider.

[0012] Preferably, the cooling mechanism further includes a moving groove formed at the top end of the first slider. A moving block is slidably connected to the inner wall of the moving groove. The moving block and the roller are rotatably connected through a rotating shaft. One end of the moving groove communicates with a circular groove, and an electric push rod is fixedly connected to one end of the circular groove. The telescopic end of the electric push rod is fixedly connected to the moving block.

[0013] Preferably, the drawing mechanism further includes a first motor fixedly connected to one end of the vertical side plate. The driving end of the first motor is fixedly connected with a threaded rod. The other end of the threaded rod is rotatably connected to a chute on one side. The threaded rod is threadedly connected to the second slider. A guiding column is fixedly connected to the inner wall of the other chute. The guiding column is slidably connected to the first slider.

[0014] Preferably, the buffer feeding mechanism includes a U-shaped plate and a straight plate. Four connecting columns are fixedly connected between the U-shaped plate and the straight plate. The four connecting columns are arranged in two groups and are symmetric about the center line of the straight plate. Limiting rods are fixedly connected to the lower oblique sides corresponding to the connecting columns between the U-shaped plate and the straight plate.

[0015] Preferably, support rods are rotatably connected to the outer walls of the four connecting columns. Fixed slots are formed at both ends of the four support rods corresponding to the outside of the connecting columns. Torsion springs are fixedly connected between the four groups of fixed slots and the connecting columns.

[0016] Preferably, a square hole is penetrated through the top end of the bottom plate. Hydraulic rods are fixedly penetrated through both sides corresponding to the square hole at the top end of the bottom plate. The telescopic ends of the two hydraulic rods are respectively fixedly connected to the two U-shaped plates. Vertical rods are fixedly connected to the bottom of the bottom plate corresponding to the lower sides of the support rods.

[0017] Preferably, the buffer feeding mechanism further includes a placing plate fixedly connected to one side of the bottom plate corresponding to the square hole. The other end of the placing plate is fixedly connected with a plurality of stoppers. Connecting plates are symmetrically and fixedly connected between the placing plate and the bottom plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By providing the lubricating mechanism, the annular wiping sponge can be rotated, and the lubricating liquid can be evenly applied to the outer surface of the seamless inner-threaded copper tube, avoiding the gap with less spraying amount. Therefore, the friction during the drawing process can be reduced, the wear of the drawing die and the seamless inner-threaded copper tube can be reduced, and the drawing force can be evenly distributed on the outer surface of the seamless inner-threaded copper tube, ensuring the drawing efficiency and drawing quality of the seamless inner-threaded copper tube. And during the application process, the lubricating liquid can be continuously provided through the connecting pipe. Since the diameter of the connecting pipe gradually decreases, the flow rate of the lubricating liquid will increase, so that the lubricating liquid can be provided in time, avoiding the situation of lubricating liquid cut-off, and further preventing the influence on the subsequent drawing quality;

[0020] 2. Through the provided cooling mechanism, the drawing die can be cooled during the drawing process, preventing the temperature of the drawing die from rising during drawing, thus avoiding damage to the lubricating fluid, enabling the lubricating fluid to always maintain its lubricating effect, preventing an increase in adhesion between the seamless internal threaded copper tube and the drawing die, reducing the drawing stress, and further preventing the seamless internal threaded copper tube from breaking. Therefore, the seamless internal threaded copper tube can be protected, and the service life of the drawing die can be extended.

[0021] 3. Through the provided buffer feeding mechanism, after drawing is completed, the seamless internal threaded copper tube can be placed on the support rod. Due to the presence of the coil spring, it can buffer when the seamless internal threaded copper tube is placed, avoiding the situation of concave deformation and scratching on the outer surface of the seamless internal threaded copper tube, and enabling the seamless internal threaded copper tube to move downward. When the support rod contacts the vertical rod, the support rod will tilt until the seamless internal threaded copper tube can slide off the support rod and fall onto the placement plate through the square hole. Therefore, the seamless internal threaded copper tube can be protected, facilitating subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the overall schematic diagram of a drawing device for processing seamless internal threaded copper tubes according to the present invention;

[0023] Figure 2 is the top view of another perspective of a drawing device for processing seamless internal threaded copper tubes according to the present invention;

[0024] Figure 3 is a drawing device for processing seamless internal threaded copper tubes according to the present invention Figure 2 enlarged view at A in;

[0025] Figure 4 is the side view of a drawing device for processing seamless internal threaded copper tubes according to the present invention;

[0026] Figure 5 is the cross-sectional view of the first slider of a drawing device for processing seamless internal threaded copper tubes according to the present invention;

[0027] Figure 6 is the cross-sectional view of the fixed plate of a drawing device for processing seamless internal threaded copper tubes according to the present invention;

[0028] Figure 7 is the structural schematic diagram of the rotating ring of a drawing device for processing seamless internal threaded copper tubes according to the present invention;

[0029] Figure 8 is the upper part structural diagram of the bottom plate of a drawing device for processing seamless internal threaded copper tubes according to the present invention;

[0030] Figure 9 is the cutting diagram of the straight plate of a drawing device for processing seamless internal threaded copper tubes according to the present invention;

[0031] Figure 10 For the drawing device for processing seamless internally threaded copper tubes of the present invention Figure 9 The enlarged view at position B in it.

[0032] In the figure: 1, bottom plate; 2, vertical side plate; 3, chute; 4, flexible hose; 5, first slider; 6, roller; 7, connecting pipe; 8, stretching device; 9, liquid inlet pipe; 10, fixing plate; 11, drawing die; 12, stop block; 13, placing plate; 14, vertical rod; 15, first motor; 16, U-shaped plate; 17, collection box; 18, second slider; 19, threaded rod; 20, gear; 21, second motor; 22, fixing ring; 23, rotating ring; 24, L-shaped plate; 25, external tooth ring; 26, moving groove; 27, moving block; 28, circular groove; 29, electric push rod; 30, cooling cavity; 31, liquid outlet pipe; 32, annular wiping sponge; 33, annular groove; 34, circular hole; 35, support rod; 36, straight plate; 37, fixing groove; 38, limiting rod; 39, coil spring; 40, connecting column. Detailed implementation manners

[0033] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0034] As Figures 1 - 10 shown, a drawing device for processing seamless internally threaded copper tubes includes a bottom plate 1. One side of the top of the bottom plate 1 is fixedly connected with a fixing plate 10. A drawing die 11 is fixedly connected to the fixing plate 10. A lubrication mechanism and a cooling mechanism are arranged on the fixing plate 10. Vertical side plates 2 are fixedly connected to both sides of the top of the bottom plate 1 corresponding to the fixing plate 10. A drawing mechanism is arranged on the two vertical side plates 2. A buffer feeding mechanism is arranged inside the bottom plate 1 corresponding to the vertical side plates 2 and the fixing plate 10. By arranging the lubrication mechanism, the outer surface of the seamless internally threaded copper tube can be continuously lubricated to ensure the drawing quality of the seamless internally threaded copper tube. By arranging the cooling mechanism, the drawing die 11 can be cooled to avoid affecting the lubrication effect of the lubricating liquid and to extend the service life of the drawing die 11. By arranging the drawing mechanism, the seamless internally threaded copper tube can be drawn. By arranging the buffer feeding mechanism, buffering can be carried out when placing the seamless internally threaded copper tube to avoid the occurrence of dents, deformations and scratches on the seamless internally threaded copper tube;

[0035] As Figure 3 、 Figure 7As shown, the lubrication mechanism includes a rotating ring 23. An annular groove 33 is formed on the outer wall of the rotating ring 23. A plurality of circular holes 34 are provided in the annular groove 33. An annular wiping sponge 32 is fixedly connected to the inner wall of the rotating ring 23. The annular wiping sponge 32 is in contact with the plurality of circular holes 34. The plurality of circular holes 34 are used for the circulation of the lubricating fluid and its penetration into the annular wiping sponge 32. The annular wiping sponge 32 is used to evenly apply the lubricating fluid on the outer wall of the seamless internal thread copper tube.

[0036] As Figure 1 , Figure 6 shown, the cooling mechanism includes a cooling cavity 30 formed between the fixed plate 10 and the drawing die 11. The lubricating fluid in the cooling cavity 30 is used to cool the drawing die 11 to prevent the temperature of the drawing die 11 from being too high during the drawing process. The fixed plate 10 is fixedly penetrated with a liquid outlet pipe 31. The other end of the liquid outlet pipe 31 is fixedly connected to a hose 4. The hose 4 is fixedly connected to the vertical side plate 2. The cooling mechanism further includes a roller 6. The roller 6 rolls and squeezes the lubricating fluid in the hose 4 to make the lubricating fluid in the cooling cavity 30 in a flowing state.

[0037] As Figure 3 , Figure 7 shown, the lubrication mechanism further includes a fixed ring 22 rotatably connected to the inner wall of the annular groove 33. Both sides of the outer wall of the fixed ring 22 are fixedly connected with L-shaped plates 24. Both L-shaped plates 24 are fixedly connected to the fixed plate 10. A second motor 21 is fixedly connected to one L-shaped plate 24. The driving end of the second motor 21 is fixedly connected with a gear 20 through a driving shaft. The outer diameter of the gear 20 is meshed with an external gear ring 25. The external gear ring 25 is fixedly connected to the rotating ring 23. The L-shaped plates 24 can limit and fix the fixed ring 22 to fixedly install it on the fixed plate 10. The second motor 21 can drive the gear 20 to rotate, so the external gear ring 25 and the rotating ring 23 can be driven to rotate. The rotation speed of the second motor 21 is at a low speed, which can evenly apply the lubricating fluid on the outer surface of the seamless internal thread copper tube, ensuring the subsequent drawing quality and drawing efficiency.

[0038] As Figure 1 , Figure 2 , Figure 3 , Figure 6As shown in the figure, the lubrication mechanism further includes a connecting pipe 7 fixedly connected to the top end of one side vertical side plate 2. The connecting pipe 7 is fixedly connected to the hose 4 and the fixing ring 22. The diameter of the connecting pipe 7 gradually decreases in the direction close to the fixing ring 22, so as to accelerate the flow rate of the lubricating fluid. The other side of the cooling cavity 30 is fixedly penetrated by a liquid inlet pipe 9. A collecting box 17 is fixedly connected to the top end of the bottom plate 1 corresponding to the lower side of the rotating ring 23. Through the hose 4, the lubricating fluid can be in a flowing state during the drawing process and provide lubricating fluid for the annular wiping sponge 32. When the lubricating fluid passes through the connecting pipe 7 with a gradually smaller diameter, the flow rate increases. This principle is based on the conservation of flow. Therefore, during the drawing process, the lubricating fluid can be stably provided, preventing the interruption of the lubricating fluid supply and ensuring the subsequent drawing effect.

[0039] As Figure 1 、 Figure 2 shown in the figure, the drawing mechanism includes sliding grooves 3 opened at one ends of the vertical side plates 2 close to each other. A first slider 5 and a second slider 18 are respectively slidably connected to the inner walls of the two sliding grooves 3. A stretching device 8 is fixedly connected between the first slider 5 and the second slider 18. The stretching device 8 is similar to the stretching trolley in a precision cold-drawn tube production device with the application number CN201620250384.7, and the internal structures are the same, so it will not be described here. Through the sliding grooves 3, the first slider 5 and the second slider 18 can be limited, and thus the stretching device 8 can be limited.

[0040] As Figure 1 、 Figure 5 shown in the figure, the cooling mechanism further includes a moving groove 26 opened at the top end of the first slider 5. A moving block 27 is slidably connected to the inner wall of the moving groove 26. The moving block 27 and the roller 6 are rotatably connected through a rotating shaft. One end of the moving groove 26 communicates with a circular groove 28. One end of the circular groove 28 is fixedly connected to an electric push rod 29. The telescopic end of the electric push rod 29 is fixedly connected to the moving block 27. Through the moving groove 26, the moving block 27 can be limited, and the roller 6 on the moving block 27 just presses the hose 4, so that the liquid in the hose 4 flows. The electric push rod 29 can provide moving power for the moving block 27, and the circular groove 28 is arranged inside the first slider 5.

[0041] As Figure 1 、 Figure 2 shown in the figure, the drawing mechanism further includes a first motor 15 fixedly connected to one end of one side vertical side plate 2. The driving end of the first motor 15 is fixedly connected to a threaded rod 19. The other end of the threaded rod 19 is rotatably connected to one side of the sliding groove 3. The threaded rod 19 is threadedly connected to the second slider 18. A guiding column is fixedly connected to the inner wall of the other side sliding groove 3. The guiding column is slidably connected to the first slider 5. By driving the threaded rod 19 to rotate through the first motor 15, the second slider 18 can be moved through the threading effect of the threaded rod 19, and the guiding column can limit the first slider 5.

[0042] As Figure 1 , Figure 8 , Figure 9 , Figure 10 shown, the buffer feeding mechanism includes a U-shaped plate 16 and a straight plate 36. Four connecting columns 40 are fixedly connected between the U-shaped plate 16 and the straight plate 36. The four connecting columns 40 are arranged in two groups and are symmetric about the center line of the straight plate 36. Limiting rods 38 are fixedly connected to the lower oblique sides corresponding to the connecting columns 40 between the U-shaped plate 16 and the straight plate 36. The U-shaped plate 16 and the straight plate 36 form a frame, and the positions of the connecting columns 40 are staggered in pairs, which is convenient for subsequent supporting functions. The supporting rod 35 can be limited by the limiting rod 38 and the supporting rod 35 is in a horizontal state.

[0043] As Figure 9 , Figure 10 shown, a supporting rod 35 is rotatably connected to the outer walls of the four connecting columns 40. Fixed grooves 37 are opened at both ends of the four supporting rods 35 corresponding to the outside of the connecting columns 40. Torsion springs 39 are fixedly connected between the four groups of fixed grooves 37 and the connecting columns 40. The elasticity of the torsion spring 39 can make the supporting rod 35 elastic. Therefore, when the seamless internally threaded copper tube falls on the supporting rod 35, buffering can be carried out, so as to reduce the dent deformation and scratching of the seamless internally threaded copper tube and ensure the quality of the seamless internally threaded copper tube.

[0044] As Figure 4 , Figure 8 shown, a square hole is penetrated through the top end of the bottom plate 1. Hydraulic rods are fixedly penetrated through both sides corresponding to the square hole at the top end of the bottom plate 1. The telescopic ends of the two hydraulic rods are fixedly connected to the two U-shaped plates 16 respectively. Vertical rods 14 are fixedly connected to the bottom of the bottom plate 1 corresponding to the lower sides of the supporting rods 35. The buffer feeding mechanism further includes a placing plate 13 fixedly connected to one side of the bottom plate 1 corresponding to the square hole at the bottom end. A plurality of stoppers 12 are fixedly connected to the other end of the placing plate 13. Connecting plates are also symmetrically and fixedly connected between the placing plate 13 and the bottom plate 1. The square hole provided can enable the seamless internally threaded copper tube to pass through and fall on the placing plate 13 below. The hydraulic rod is controlled by the synchronous controller to drive the U-shaped plate 16 to move downward. When the supporting rod 35 contacts the vertical rod 14, the supporting rod 35 will rotate and tilt. When the U-shaped plate 16 contacts the bottom plate 1, the supporting rod 35 is in a completely open state. Therefore, the seamless internally threaded copper tube can fall into the square hole. Since the placing plate 13 has an arc, the seamless internally threaded copper tube can slide down slowly, thereby protecting the seamless internally threaded copper tube again.

[0045] Working principle: First, make a part of the seamless internally threaded copper tube pass through the drawing die 11, and clamp and fix the seamless internally threaded copper tube through the stretching device 8. At this time, start the electric push rod 29 to drive the moving block 27 to move, so that the roller 6 squeezes the hose 4. Then start the first motor 15 to drive the threaded rod 19 to rotate, and through the threading effect of the threaded rod 19, the second slider 18 can be moved, so as to drive the stretching device 8 and the first slider 5 to move. Since the roller 6 can rotate, when the first slider 5 moves, the hose 4 will be continuously squeezed and the lubricating fluid in the hose 4 will be in a flowing state, so that the lubricating fluid in the cooling cavity 30 will be in a flowing state. Therefore, new lubricating fluid can be continuously replaced and the drawing die 11 can be cooled to prevent the temperature of the drawing die 11 from being too high during the drawing process, so as to prevent the lubricating effect of the lubricating fluid from being affected, and further prevent the drawing effect of the seamless internally threaded copper tube from being affected;

[0046] Furthermore, the lubricating fluid in the hose 4 flows into the connecting pipe 7. Since the diameter of one end of the connecting pipe 7 gradually decreases, the flow rate of the lubricating fluid can be increased, and the cavity between the fixed ring 22 and the annular groove 33 can be quickly filled, and it penetrates into the annular wiping sponge 32 through the circular hole 34, and the outer surface of the seamless internally threaded copper tube is smeared through the annular wiping sponge 32. Since the flow rate of the lubricating fluid can be continuously provided, the situation of interrupted supply can be avoided, and the lubricating effect can be ensured. At the same time, start the second motor 21 to drive the gear 20 to rotate, and the gear 20 drives the external tooth ring 25 to rotate, so that the rotating ring 23 and the annular wiping sponge 32 can rotate, so that the lubricating fluid can be evenly smeared on the outer surface of the seamless internally threaded copper tube, so as to improve the drawing quality and drawing efficiency;

[0047] Even further, after the drawing of the seamless internally threaded copper tube is completed, release the clamping of the seamless internally threaded copper tube. At this time, the seamless internally threaded copper tube falls on the support rod 35. Due to the existence of the coil spring 39, the seamless internally threaded copper tube can be buffered. At this time, start the hydraulic rod to drive the U-shaped plates 16 on both sides to move downward. When the support rod 35 contacts the vertical rod 14, it starts to tilt. When the U-shaped plate 16 contacts the bottom plate 1, the support rod 35 is in a fully open state. At this time, the seamless internally threaded copper tube passes through the square hole and falls on the placing plate 13, and will contact the arc section on the placing plate 13 when falling, so that the seamless internally threaded copper tube can roll down, avoiding the situation of dent deformation and scratching of the seamless internally threaded copper tube.

[0048] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A drawing device for processing seamless internally threaded copper tubes, comprising a base plate (1), characterized in that: A fixed plate (10) is fixedly connected to one side of the top of the bottom plate (1), a drawing die (11) is fixedly connected to the fixed plate (10), a lubrication mechanism and a cooling mechanism are provided on the fixed plate (10), both sides of the top of the bottom plate (1) corresponding to the fixed plate (10) are fixedly connected to vertical side plates (2), the two vertical side plates (2) are provided with a drawing mechanism, and a buffer discharge mechanism is provided on the inner side of the top of the bottom plate (1) corresponding to the vertical side plates (2) and the fixed plate (10); The lubrication mechanism comprises a rotating ring (23), an annular groove (33) is formed on the outer wall of the rotating ring (23), a plurality of circular holes (34) are formed on the annular groove (33), an annular wiping sponge (32) is fixedly connected to the inner wall of the rotating ring (23), the annular wiping sponge (32) is in contact with the plurality of circular holes (34), the plurality of circular holes (34) are used for the circulation of lubricating liquid and the penetration into the annular wiping sponge (32), and the annular wiping sponge (32) is used for evenly applying the lubricating liquid to the outer wall of the seamless internally threaded copper tube; The cooling mechanism comprises a cooling chamber (30) provided between the fixed plate (10) and the drawing die (11); the lubricating liquid in the cooling chamber (30) is used to cool the drawing die (11) to prevent the drawing die (11) from being overheated during the drawing process; a liquid outlet pipe (31) is fixedly passed through the fixed plate (10); a hose (4) is fixedly connected to the other end of the liquid outlet pipe (31); the hose (4) is fixedly connected to the vertical side plate (2); the cooling mechanism further comprises a roller (6); the roller (6) rolls and squeezes the lubricating liquid in the hose (4) and keeps the lubricating liquid in the cooling chamber (30) in a flowing state.

2. A drawing device for processing seamless internally threaded copper tubes according to claim 1, characterized in that: The lubrication mechanism further comprises a fixed ring (22) rotatably connected to the inner wall of the annular groove (33), L-shaped plates (24) are fixedly connected to both sides of the outer wall of the fixed ring (22), both L-shaped plates (24) are fixedly connected to the fixed plate (10), a second motor (21) is fixedly connected to one of the L-shaped plates (24), a gear (20) is fixedly connected to the driving end of the second motor (21) via a driving shaft, an outer gear ring (25) is meshingly connected to the outer diameter of the gear (20), and the outer gear ring (25) is fixedly connected to the rotating ring (23).

3. A drawing device for processing seamless internally threaded copper tube according to claim 2, characterized in that: The lubrication mechanism further comprises a connecting pipe (7) fixedly connected to the top end of the vertical side plate (2) on one side, the connecting pipe (7) and the hose (4) are fixedly connected, the connecting pipe (7) and the fixing ring (22) are fixedly connected, the diameter of the connecting pipe (7) gradually decreases in the direction where the connecting pipe (7) approaches the fixing ring (22), so that the flow rate of the lubricating liquid is accelerated, a liquid inlet pipe (9) is fixedly penetrated through the other side of the cooling cavity (30), and a collecting box (17) is fixedly connected to the top end of the bottom plate (1) corresponding to the lower side of the rotating ring (23).

4. A drawing device for processing seamless internally threaded copper tube according to claim 1, characterized in that: The pulling mechanism comprises a slide groove (3) provided at one end of the vertical side plate (2) close to each other, the inner walls of the two slide grooves (3) are respectively slidably connected with a first slider (5) and a second slider (18), and a stretching device (8) is fixedly connected between the first slider (5) and the second slider (18).

5. A drawing device for processing seamless internally threaded copper tube according to claim 4, characterized in that: The cooling mechanism further comprises a movable groove (26) formed at the top end of the first sliding block (5); a movable block (27) is slidably connected to the inner wall of the movable groove (26); the movable block (27) and the roller (6) are rotatably connected via a rotating shaft; one end of the movable groove (26) is connected to a circular groove (28); one end of the circular groove (28) is fixedly connected to an electric push rod (29); and a telescopic end of the electric push rod (29) is fixedly connected to the movable block (27).

6. A drawing device for processing seamless internally threaded copper tube according to claim 4, characterized in that: The pulling mechanism further comprises a first motor (15) fixedly connected to one end of the vertical side plate (2) on one side, a threaded rod (19) fixedly connected to a driving end of the first motor (15), the other end of the threaded rod (19) being rotatably connected to a slide groove (3) on one side, the threaded rod (19) being threadedly connected to a second slider (18), a guide column fixedly connected to an inner wall of the slide groove (3) on the other side, and the guide column being slidably connected to the first slider (5).

7. A drawing device for processing seamless internally threaded copper tube according to claim 1, characterized in that: The buffer discharge mechanism comprises a U-shaped plate (16) and a straight plate (36), four connecting columns (40) are fixedly connected between the U-shaped plate (16) and the straight plate (36), the four connecting columns (40) are arranged in two groups and are symmetrical about the center line of the straight plate (36), and the oblique lower parts of the corresponding connecting columns (40) between the U-shaped plate (16) and the straight plate (36) are fixedly connected to limit rods (38).

8. A drawing device for processing seamless internally threaded copper tube according to claim 7, characterized in that: The outer walls of the four connecting columns (40) are rotatably connected to support rods (35), and fixing grooves (37) are provided at both ends of the four support rods (35) on the outer sides corresponding to the connecting columns (40), and coil springs (39) are fixedly connected between the four groups of fixing grooves (37) and the connecting columns (40).

9. A drawing device for processing seamless internally threaded copper tube according to claim 8, characterized in that: A square hole is formed at the top of the bottom plate (1), and hydraulic rods are fixedly inserted through both sides of the top of the bottom plate (1) corresponding to the square hole. The telescopic ends of the two hydraulic rods are respectively fixedly connected to the two U-shaped plates (16), and the top of the bottom plate (1) corresponding to the support rod (35) is fixedly connected to a vertical rod (14).

10. A drawing device for processing seamless internally threaded copper tube according to claim 9, characterized in that: The buffer discharge mechanism further comprises a placement plate (13) fixedly connected to one side of the bottom end of the bottom plate (1) corresponding to the square hole, the other end of the placement plate (13) being fixedly connected to a plurality of stoppers (12), and a connecting plate being symmetrically fixedly connected between the placement plate (13) and the bottom plate (1).

Images