A copper alloy double-mode continuous extrusion device and method

Abstract

The present invention belongs to the technical field of continuous pressure processing, and particularly relates to a copper alloy double-mode continuous extrusion device and method. The continuous extrusion device includes a machine body, a compaction wheel, an extrusion wheel, a drive shaft, a scraper, and further includes a double-mode forming assembly, an anti-oxidation channel, and a cooling water tank. The double-mode forming assembly includes a boot seat, a guide plate, a material blocking block, an inlet insert, a material distributing plate, a material distributing cavity, and two forming dies. The boot seat is installed at the rear of the machine body, and a guide plate is installed on the boot seat to deflect the casting rod. An inlet insert is installed in the middle and lower part of the boot seat, and the inlet insert is provided with a material blocking block. The material distributing plate is installed in the material distributing cavity, and the V-shaped block divides the casting rod blank in the hole channel of the material distributing plate into two parts, entering the two chambers of the material distributing cavity. Two detachable and replaceable forming dies are installed at the rear of the material distributing cavity. The present invention can realize the simultaneous production of two profiles with different sizes and shapes by one device, and the way of replacing the die to adjust the profile shape is more flexible.

Description

Technical Field

[0001] The invention belongs to the technical field of continuous pressurizing processing, and in particular relates to a copper alloy double-die continuous extrusion device and method. Background Art

[0002] Copper alloys are widely used in electrical, electronic, communication and automotive industries due to their excellent electrical and thermal conductivity and corrosion resistance. Common copper alloys include brass (copper-zinc alloy), bronze (copper-tin alloy), white copper (copper-nickel alloy), etc. With the development of modern industry, higher requirements are placed on the performance and quality of copper alloy products, such as improving the strength, wear resistance and fatigue resistance of the material.

[0003] Traditional copper alloy extrusion processes include intermittent extrusion and continuous extrusion. Intermittent extrusion has low efficiency, more material waste during the production process, and unstable product quality. The continuous extrusion process can achieve mass production, greatly improve production efficiency, and reduce production costs. By precisely controlling the extrusion temperature and pressure, the continuous extrusion products have excellent mechanical properties and conductivity. The continuous extrusion process can process copper alloy profiles with various complex cross-sections, with less material waste and a high product yield rate.

[0004] In order to improve the quality of copper continuous extrusion products, the Chinese invention patent with publication number CN105195543A discloses a metal special-shaped U-row continuous extrusion die, which is provided with a gasket diversion area, a flow blocking area, a flow promotion area, and a transition area, which can effectively adjust the flow of metal, make the metal tend to flow evenly, promote the metal to flow to the small-sized part, and make the metal flow speed uniform and stable when the metal enters the sizing belt, thereby ensuring the uniformity of the profile size and improving the molding effect of the product. Another example is a continuous extrusion method and equipment for lead brass disclosed in Chinese invention patent CN102294376B. The existing copper continuous extruder has a similar structure principle, and fixedly produces specific profile products. Each copper continuous extruder needs to be equipped with a motor and a reducer for driving. The copper alloy feeding part is provided with a discharge tray, a straightening feeding device, and a heating furnace. After the continuous extruder is extruded, it enters the cooling tank, a blow dryer, and a material unloading area, and a control cabinet is also required. The overall vertical space occupied in the workshop is tens of meters, and the horizontal space (mainly the continuous extruder part) occupies seven or eight meters. When an enterprise encounters more orders, it needs to increase the output per unit time. At this time, it needs to add production lines, which requires additional production space. At the same time, a series of equipment such as supporting discharge trays, straightening and feeding devices, cooling troughs, etc. need to be added, and corresponding operating and management personnel are required, which requires a large investment. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the problem to be solved by the present invention is that the existing copper continuous extrusion equipment needs to be equipped with a series of complete supporting equipment such as a control cabinet, a discharge tray, a straightening and feeding device, a heating furnace, a cooling tank, a blow dryer, and a material unloading area for continuous production operation, and the investment is too large when the output needs to be increased. The present invention provides a copper alloy double-mode continuous extrusion device and method, which improves the structure of the extrusion wheel and the compaction wheel so that the copper rod shape is extruded flatter. After the flat blank is cut by a slitting knife, it enters the deformation expansion channel, and is extruded and formed by two identical or different molds, and finally enters the double-tube vacuum cooling tube, and is blown dry and rolled after cooling in a layered water tank. Through the innovative design of the continuous extrusion device, two profiles of different sizes and shapes can be produced at the same time, which greatly improves production efficiency and reduces the investment in production equipment.

[0006] The present invention adopts the following technical scheme: a copper alloy double-die continuous extrusion device, comprising: a machine body, a compacting wheel, an extrusion wheel, a driving shaft, a scraper, a double-die forming component, an anti-oxidation channel, and a cooling water tank.

[0007] The drive shaft is installed on the machine body and drives the extrusion wheel to rotate. The extrusion wheel and the compaction wheel drive the copper alloy casting rod into the double-mold forming assembly. The wheel surface of the compaction wheel is provided with multiple protrusions evenly arranged in an annular direction. The scraper is arranged on the machine body to clean the wheel groove of the extrusion wheel.

[0008] The double-mold forming assembly comprises a shoe seat, a guide plate, a material stopper, an inlet insert, a material dividing plate, a material dividing cavity, and two forming dies. The shoe seat is installed at the rear of the machine body, a guide plate is installed on the shoe seat to deflect the direction of the casting rod, an inlet insert is installed at the middle and lower part of the shoe seat, the inlet insert is provided with a material stopper, and a casting rod inlet is provided at the upper part of the material stopper; a fitted material dividing plate is provided at the rear of the inlet insert, the material dividing plate is installed in the material dividing cavity, the material dividing plate is provided with a through channel to guide the casting rod, and the material dividing cavity is provided with a V-shaped block. The tip of the V-shaped block is close to the dividing plate to form two upper and lower chambers; the V-shaped block divides the cast rod blank in the hole of the dividing plate into two parts, which enter the two chambers of the dividing cavity. The back plates of the dividing cavity above and below the V-shaped block are provided with two variable diameter holes, and the variable diameter holes are provided with inclined holes; two detachable and replaceable forming molds are installed at the rear of the dividing cavity, and the two forming molds are arranged up and down, and the mold holes correspond to the variable diameter holes of the dividing cavity respectively; two discharge ports are provided at the rear of the shoe seat to pass through the mold holes of the forming mold,

[0009] The anti-oxidation channel is connected to the two discharge ports of the shoe seat. A partition is arranged in the anti-oxidation channel to prevent the two copper alloy profiles from affecting each other. A nitrogen pipe is arranged in the anti-oxidation channel to introduce nitrogen into the two internal chambers.

[0010] According to another embodiment of the invention or the continuous extrusion equipment of any one of the foregoing embodiments, wherein the variable-diameter channel of the material distribution cavity includes a flared opening with an angle of 10-15 degrees, and the flared opening extends towards the forming die. With such a setting, the forming effect will be better.

[0011] According to another embodiment of the invention or the continuous extrusion equipment of any one of the foregoing embodiments, wherein the die hole shapes and size specifications of the two forming dies can be the same or different. Two profiles with different sizes and shapes can be produced.

[0012] According to another embodiment of the invention or the continuous extrusion equipment of any one of the foregoing embodiments, wherein the two sides of the V-shaped block of the material distribution cavity are arc-shaped, and the top angle is provided with a rounded corner. This is more convenient for the flow of the copper alloy after deformation and also avoids damaging the V-shaped block.

[0013] According to another embodiment of the invention or the continuous extrusion equipment of any one of the foregoing embodiments, wherein the V-shaped block of the material distribution cavity is integrally formed with the material distribution cavity. It is formed by machining, which improves the rigidity of the structure.

[0014] According to another embodiment of the invention or the continuous extrusion equipment of any one of the foregoing embodiments, wherein the compaction wheel is suspended above the extrusion wheel through a compaction adjustment frame, and the compaction adjustment frame raises and lowers the compaction wheel by screwing a screw.

[0015] According to another embodiment of the invention or the continuous extrusion equipment of any one of the foregoing embodiments, wherein the protrusions on the compaction wheel are inlaid with cemented carbide particles with a particle size of 3-6 mm.

[0016] According to another embodiment of the invention or the continuous extrusion equipment of any one of the foregoing embodiments, wherein the cooling water tank is provided with a double-layer structure. The upper water tank is smaller in size than the lower water tank, and the cooling water overflowing from the upper part enters the lower water tank. The copper alloy profile above is immersed in the upper water tank, and the copper alloy profile below is immersed in the lower water tank.

[0017] According to another embodiment of the invention or the continuous extrusion equipment of any one of the foregoing embodiments, wherein two groups of multiple symmetric cooling nozzles are arranged on the inner wall of the cooling water tank along the material discharging direction of the profile. A guide wheel assembly is arranged in the water tank. The guide wheel assembly includes a U-shaped bracket and two guide wheels installed in the U-shaped bracket, and the guide wheels are arranged vertically. One end of the water tank is provided with a sunken tank body, which is deeper than the water tank below the cooling nozzles. A return pipe is connected to the sunken tank body and introduced into the water tank. A water supply pipe is also installed in the water tank, and the cooling water is sent into the branch pipe connected to the cooling nozzles through a water pump.

[0018] Correspondingly, a working method of a copper alloy double-mode continuous extrusion device is disclosed, including the following steps:

[0019] 1. After installing and debugging the copper alloy double-mode continuous extrusion device, the cast rod is unwound and then enters the straightening device for straightening twice, followed by feeding.

[0020] 2. The cast rod enters the induction heating furnace and is heated to above 450 °C for softening.

[0021] 3. The cast rod enters the groove of the extrusion wheel and, under the extrusion and pushing of the compaction wheel with protrusions, enters the channel formed by the guide plate and the wheel groove, changing to arc-shaped feeding.

[0022] 4. The cast rod is blocked by the stop block and enters the hole channel of the dividing plate from the inlet of the inlet insert. It is divided into two parts by the V-shaped block in the dividing cavity and enters the two cavities of the dividing cavity.

[0023] 5. After the deformed copper alloy fills the two cavities, it enters the forming die through the reduced-diameter hole channel for forming.

[0024] 6. The formed profile enters the anti-oxidation channel from the discharge port of the shoe base for nitrogen blowing and cooling.

[0025] 7. The formed copper alloy profile enters the cooling water tank for cooling and then enters the subsequent process for treatment.

[0026] Advantages of the present invention:

[0027] 1. A copper alloy double-mode continuous extrusion device and method disclosed by the present invention can realize the simultaneous production of two profiles with different sizes and shapes by one device. The way of changing the profile shape by replacing the die is more flexible, greatly improving the production efficiency and reducing the investment in production equipment.

[0028] 2. The present invention improves the anti-oxidation channel and the cooling water tank, resulting in better forming quality. Specifically, the nitrogen blowing method is used to prevent the oxidation of the extruded copper alloy profile; the cooling water tank is designed for double-mode discharging, and the spraying and water circulation methods are used to cool down the upper and lower layers of the copper alloy finished profiles.

[0029] 3. Compared with the traditional method, the present invention does not simply set two forming die holes, nor does it need to set two sets of unwinders and feeding and straightening devices, and there is no need to connect two copper alloy cast rods; the present invention uses a compaction wheel with protrusions, which cooperates with the dividing plate and the dividing cavity to partition the extruded copper alloy, corresponding to a single die. The dividing cavity is provided with a reduced-diameter hole, and the die and the dividing cavity can be disassembled and replaced to produce copper alloy profiles of different specifications, sizes and shapes. Description of the drawings

[0030] Figure 1 It is a side view of the copper alloy double-mode continuous extrusion device described in the present invention;

[0031] Figure 2Schematic three-dimensional view of the copper alloy double-mode continuous extrusion device according to the present invention;

[0032] Figure 3 Enlarged schematic three-dimensional view of the guide wheel assembly according to the present invention;

[0033] Figure 4 Schematic three-dimensional view of the machine body, drive shaft, and anti-oxidation channel according to the present invention;

[0034] Figure 5 Schematic three-dimensional view of the machine body, scraper, extrusion wheel, and compaction wheel according to the present invention;

[0035] Figure 6 Side view schematic of the machine body, drive shaft, and anti-oxidation channel according to the present invention;

[0036] Figure 7 Top view schematic of the machine body, drive shaft, and anti-oxidation channel according to the present invention;

[0037] Figure 8 Cross-sectional view schematic of the machine body, double-mode forming assembly, and compaction adjustment frame according to the present invention;

[0038] Figure 9 Enlarged cross-sectional view schematic of the double-mode forming assembly according to the present invention;

[0039] Figure 10 Enlarged schematic three-dimensional view of the double-mode forming assembly according to the present invention Figure 1 ;

[0040] Figure 11 Enlarged schematic three-dimensional view of the double-mode forming assembly according to the present invention Figure 2 ;

[0041] Figure 12 Enlarged schematic three-dimensional view of the compaction wheel according to the present invention;

[0042] Figure 13 Exploded assembly view schematic of the double-mode forming assembly according to the present invention;

[0043] In the figure, 1. Machine body; 2. Compaction adjustment frame; 3. Anti-oxidation channel; 4. Cooling water tank; 5. Return water pipe; 6. Nitrogen connection pipe; 7. Water supply pipe; 8. Guide wheel assembly; 9. Cooling nozzle; 10. Water tank; 11. Drive shaft; 12. Scraper; 13. Compaction wheel; 14. Shoe base; 15. Guide plate; 16. Material blocking block; 17. Inlet insert; 18. Dividing plate; 19. Dividing cavity; 20. Forming die; 21. Extrusion wheel. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0045] As Figure 1 、 2 shown in Figures 4 and 5, a copper alloy double-mode continuous extrusion device includes: a machine body 1, a compaction wheel 13, an extrusion wheel 21, a drive shaft 11, a scraper 12, and further includes a double-mode forming assembly, an anti-oxidation channel 3, and a cooling water tank 4. As Figure 4 、 5 shown, the drive shaft 11 is installed through the machine body 1 and drives the extrusion wheel 21 to rotate. The extrusion wheel 21 and the compaction wheel 13 drive the copper alloy casting rod into the double-mode forming assembly. As Figure 12 shown, a plurality of protrusions arranged circumferentially and uniformly are provided on the wheel surface of the compaction wheel 13. The scraper 12 is arranged on the machine body 1 to clean the wheel groove of the extrusion wheel 21. The compaction wheel 13 is suspended above the extrusion wheel 21 through a compaction adjustment frame 2, and the compaction adjustment frame 2 raises and lowers the compaction wheel 13 by screwing the screw rod. The protrusions on the compaction wheel 13 are inlaid with cemented carbide particles, and the particle size is 3-6 mm.

[0046] As Figure 6 、 7 shown in Figures 8, the double-mode forming assembly includes a boot seat 14, a guide plate 15, a material blocking block 16, an inlet insert 17, a material distributing plate 18, a material distributing cavity 19, and two forming dies 20. The boot seat 14 is installed at the rear of the machine body 1. A guide plate 15 is installed on the boot seat 14 to deflect the casting rod. An inlet insert 17 is installed in the middle and lower part of the boot seat 14. A material blocking block 16 is provided on the inlet insert 17, and a casting rod inlet is provided at the upper part of the material blocking block 16. As Figure 8 、 9 shown in Figures 10 and 13, a fitting material distributing plate 18 is provided at the rear of the inlet insert 17. The material distributing plate 18 is installed in the material distributing cavity 19. The material distributing plate 18 is provided with a through hole to guide the casting rod. The material distributing cavity 19 is provided with a V-shaped block. The tip of the V-shaped block is closely attached to the material distributing plate 18, forming upper and lower chambers. The V-shaped block divides the casting rod blank in the hole of the material distributing plate 18 into two parts and enters the two chambers of the material distributing cavity 19. The two sides of the V-shaped block of the material distributing cavity 19 are arc-shaped, and the top angle is provided with a fillet. It is more convenient for the flow of the copper alloy after deformation and also avoids damaging the V-shaped block. The V-shaped block of the material distributing cavity 19 is integrally formed with the material distributing cavity 19. It is formed by machining, which improves the rigidity of the structure.

[0047] As Figure 9 、 13As shown, the back plates of the material distribution cavity 19 above and below the V-shaped block are provided with two variable diameter channels, and the variable diameter channels are provided with oblique holes. The variable diameter channel of the material distribution cavity 19 includes a bell mouth with an angle of 10-15 degrees, and the bell mouth expands toward the forming mold 20. In this way, the forming effect will be better.

[0048] like Figure 9 , 13 As shown, two detachable and replaceable forming dies 20 are installed at the rear of the material distribution cavity 19. The two forming dies 20 are arranged up and down, and the die holes correspond to the variable diameter channels of the material distribution cavity 19 respectively. Figure 11 As shown, two discharge ports are arranged at the rear of the shoe seat 14 and are connected to the die holes of the forming mold 20. The shapes and dimensions of the die holes of the two forming molds 20 can be the same or different. Two profiles of different sizes and shapes can be produced.

[0049] like Figure 2 , 4 As shown, the anti-oxidation channel 3 connects the two discharge ports of the shoe seat 14, a partition is arranged in the anti-oxidation channel 3 to prevent the two copper alloy profiles from affecting each other, and a nitrogen pipe 6 is arranged in the anti-oxidation channel 3 to introduce nitrogen into the two internal chambers.

[0050] like Figure 2 As shown, since there are two types of profiles arranged in an upper and lower arrangement for discharge, the traditional water trough needs to be improved. It can be improved in the following two ways: 1) The cooling water trough 4 is set up with a double-layer structure, the upper water trough is smaller than the lower water trough, and the overflow cooling water from the upper part enters the lower water trough, the upper copper alloy profile is immersed in the upper water trough, and the lower copper alloy profile is immersed in the lower water trough. 2) Two groups of cooling nozzles 9 are arranged symmetrically along the profile discharge direction on the inner wall of the cooling water trough 4. A guide wheel assembly 8 is set in the water trough, as shown in FIG. Figure 3 As shown, the guide wheel assembly 8 includes a U-shaped bracket and two guide wheels installed in the U-shaped bracket, and the guide wheels are arranged up and down. A sinking tank body is provided at one end of the water tank, and the depth is deeper than the water tank below the cooling nozzle 9. The return pipe 5 is connected to the sinking tank body and introduced into the water tank 10. The water tank 10 is also equipped with a water supply pipe 7, and the cooling water is sent to the branch pipe connected to the cooling nozzle 9 through a water pump.

[0051] Accordingly, a working method of a copper alloy double-die continuous extrusion device is disclosed, comprising the following steps:

[0052] 1. After installing and debugging the copper alloy double-die continuous extrusion device, the cast rod is unwound and enters the straightening device for two straightenings and feeding.

[0053] 2. The cast rod enters the induction heating furnace and is heated to above 450 degrees Celsius to soften.

[0054] 3. The cast rod enters the groove of the extrusion wheel 21, and under the extrusion and pushing of the compaction wheel 13 with protrusions, it enters the channel formed by the guide plate 15 and the groove and changes to arc-shaped feeding.

[0055] 4. The cast rod is blocked by the material blocking block 16, enters the channel of the distribution plate 18 from the inlet of the inlet insert 17, and is divided into two parts by the V-shaped block of the distribution cavity 19 and enters the two cavities of the distribution cavity 19.

[0056] 5. After the deformed copper alloy fills the two cavities, it enters the forming die 20 through the reduced-diameter channel for forming.

[0057] 6. The formed profile enters the anti-oxidation channel 3 from the discharge port of the shoe base 14 for nitrogen blowing and cooling.

[0058] 7. The formed copper alloy profile enters the cooling water tank 4 for cooling and then enters the subsequent process for treatment.

[0059] The working principle of the present invention:

[0060] Chinese Invention Patent CN100393437C - Method and Device for Producing Extruded Products by Using a Single-Groove Continuous Extrusion Machine discloses that in order to improve production efficiency, the British BWE company adopts a double-in and double-out extrusion process and uses a double-groove extrusion machine, that is, two grooves are opened on the extrusion wheel 21, and two copper rods enter the double grooves during feeding. For the method and device for producing extruded products by using a single-groove continuous extrusion machine, a single-groove is adopted, two copper rods are fed, and after passing through their respective straightening devices and deoxidation processes, they enter the compaction wheel 13 and the extrusion wheel 21, and two finished products are extruded through a double-hole die.

[0061] As Figures 8 - 13 shown, the difference between the present invention and the above two methods is that the present invention does not introduce two copper rods, but adopts the following solutions to solve the problem of the feeding amount per unit time: 1) Select rod materials with a diameter 20%-30% thicker than that of conventional copper alloy cast rods; 2) Increase the rotation speeds of the compaction wheel 13 and the extrusion wheel 21 by 10%-20%. At the same time, according to the characteristic that copper alloy is softer than other metals, hard alloy protrusion particles are arranged on the wheel surface of the compaction wheel 13 to provide a propelling force for the copper alloy cast rod to facilitate subsequent extrusion. The present invention uses the distribution plate 18 and the distribution cavity 19 to form two buffer spaces, the blank is compressed in length, fills the two buffer spaces, and after the buffer spaces are all filled, it flows out from the reduced-diameter hole on the distribution cavity 19, generates a violent radial flow in the two dies, and finally forms.

[0062] After the forming is completed, the high temperature caused by extrusion deformation will oxidize the copper alloy. In the present invention, the finished product is led out through two anti-oxidation channels 3 into which nitrogen is introduced, and is cooled by nitrogen and the oxidation effect of oxygen is eliminated. When entering the cooling water tank 4, the traditional cooling water tank 4 adopts a water immersion type, while the two copper alloy profiles formed in the present invention are discharged in an up-and-down arrangement, and it is impossible to achieve water immersion cooling through a single cooling water tank 4 (after the upper copper alloy profile is immersed, the lower copper alloy profile cannot continuously pass through the water tank without causing the cooling water to overflow). The present invention solves this problem through two solutions. One is to adopt spray cooling, the length of the water tank becomes longer, and the guide wheel assembly 8 arranged in the water tank has two guide wheels arranged up and down. The heated cooling water after spraying enters the water tank 10 from one end of the cooling water tank 4 through the return water pipe 5, and after circulation, it continues to be sprayed through the water supply pipe 7. Another way is that the cooling water tank 4 adopts a double-layer structure. The upper water tank is smaller in size than the lower water tank, and the overflowing cooling water in the upper part will enter the lower water tank. The upper copper alloy profile is immersed in the upper water tank, and the lower copper alloy profile is immersed in the lower water tank.

[0063] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments are only for explaining the technical concept and features of the present invention, and the purpose is to enable those familiar with this technology to understand the content of the present invention and implement it, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A copper alloy double-mode continuous extrusion device, comprising: The machine body (1), compaction wheel (13), extrusion wheel (21), drive shaft (11), and scraper (12), characterized in that: it further includes a dual-mode forming assembly, an anti-oxidation channel (3), and a cooling water tank (4). The drive shaft (11) is installed through the machine body (1) and drives the extrusion wheel (21) to rotate. The extrusion wheel (21) and the compaction wheel (13) drive the copper alloy casting rod into the dual-mode forming assembly. A plurality of protrusions are arranged in a circumferentially uniform manner on the wheel surface of the compaction wheel (13); the scraper (12) is arranged on the machine body (1) to clean the wheel grooves of the extrusion wheel (21). The dual-mode forming assembly includes a boot seat (14), a guide plate (15), a material blocking block (16), an inlet insert (17), a material distributing plate (18), a material distributing cavity (19), and two forming dies (20). The boot seat (14) is installed at the rear of the machine body (1). A guide plate (15) is installed on the boot seat (14) to deflect the casting rod. An inlet insert (17) is installed in the middle and lower part of the boot seat (14). The inlet insert (17) is provided with a material blocking block (16), and a casting rod inlet is arranged above the material blocking block (16); a fitting material distributing plate (18) is arranged at the rear of the inlet insert (17). The material distributing plate (18) is installed in the material distributing cavity (19). The material distributing plate (18) is provided with a through hole to guide the casting rod. The material distributing cavity (19) is provided with a V-shaped block. The V-shaped block of the material distributing cavity (19) is integrally formed with the material distributing cavity (19). The two side surfaces of the V-shaped block of the material distributing cavity (19) have arcs, and the top angle is provided with a rounded corner. The tip of the V-shaped block is closely attached to the material distributing plate (18) to form two upper and lower chambers; the V-shaped block divides the casting rod blank in the hole of the material distributing plate (18) into two parts and enters the two chambers of the material distributing cavity (19). Reducing diameter holes are arranged on the back plates of the material distributing cavity (19) above and below the V-shaped block. The reducing diameter holes are provided with inclined holes; the reducing diameter holes of the material distributing cavity (19) include a flared opening with an angle of 10 - 15 degrees, and the flared opening expands towards the forming die (20); two detachable and replaceable forming dies (20) are installed at the rear of the material distributing cavity (19). The two forming dies (20) are arranged vertically, and the die holes respectively correspond to the reducing diameter holes of the material distributing cavity (19); two discharge ports are arranged at the rear of the boot seat (14) and are communicated with the die holes of the forming die (20). The anti-oxidation channel (3) connects the two discharge ports of the boot seat (14). A partition is arranged in the anti-oxidation channel (3) to prevent the two copper alloy profiles from affecting each other. A nitrogen gas connection pipe (6) is arranged in the anti-oxidation channel (3) to introduce nitrogen gas into the two internal chambers.

2. The copper alloy double-mode continuous extrusion device according to claim 1, wherein: The die hole shapes and size specifications of the two forming dies (20) can be the same or different.

3. A copper alloy double-mode continuous extrusion device according to claim 1, characterized in that: The compaction wheel (13) is suspended above the extrusion wheel (21) through a compaction adjustment frame (2), and the compaction adjustment frame (2) raises and lowers the compaction wheel (13) by screwing the screw.

4. A copper alloy double-mode continuous extrusion device according to claim 1, characterized in that: The protrusions on the compaction wheel (13) are inlaid hard alloy particles with a particle size of 3 - 6 mm.

5. A copper alloy double-mode continuous extrusion device according to claim 1, characterized in that: The cooling water tank (4) is provided with a double-layer structure. The upper water tank is smaller in size than the lower water tank. The cooling water overflowing from the upper part enters the lower water tank. The upper copper alloy profile is immersed in the upper water tank, and the lower copper alloy profile is immersed in the lower water tank.

6. A copper alloy double-mode continuous extrusion device according to claim 1, characterized in that: Two groups of multiple symmetric cooling nozzles (9) arranged along the profile discharging direction are provided on the inner wall of the cooling water tank (4). A guide wheel assembly (8) is arranged in the water tank. The guide wheel assembly (8) includes a U-shaped bracket and two guide wheels installed in the U-shaped bracket, with the guide wheels arranged vertically. One end of the water tank is provided with a sunken tank body, which is deeper than the water tank below the cooling nozzle (9). The return water pipe (5) is connected to the sunken tank body and introduced into the water tank (10). A water supply pipe (7) is also installed in the water tank (10), and the cooling water is sent into the branch pipe connected to the cooling nozzle (9) through a water pump.

7. A working method of a copper alloy double-mode continuous extrusion device according to any one of claims 1-6, characterized in that: It includes the following steps: S1. After the copper alloy double-mode continuous extrusion device is installed and debugged, the casting rod is uncoiled and then enters the straightening device for straightening twice, and then the feeding is carried out. S2. The casting rod enters the induction heating furnace and is heated to above 450 °C for softening. S3. The casting rod enters the wheel groove of the extrusion wheel (21), and under the extrusion and pushing of the compaction wheel (13) with protrusions, it enters the channel formed by the guide plate (15) and the wheel groove and changes to arc-shaped feeding. S4. The casting rod is blocked by the material blocking block (16), enters the hole channel of the distribution plate (18) from the inlet of the inlet insert (17), and is divided into two parts by the V-shaped block of the distribution cavity (19) and enters the two cavities of the distribution cavity (19). S5. After the deformed copper alloy fills the two cavities, it enters the forming die (20) through the variable-diameter hole channel for forming. S6. The formed profile enters the anti-oxidation channel (3) from the discharge port of the boot seat (14) for nitrogen blowing and cooling. S7. The formed copper alloy profile enters the cooling water tank (4) for cooling and then enters the subsequent process for treatment.

Images