A continuous extrusion device and method for copper strip processing

Abstract

The present invention provides a continuous extrusion device and method for copper strip processing, which relates to the technical field of copper strip processing devices. A continuous extrusion device for copper strip processing includes: a workbench erected on a horizontal plane; a first rotation source fixedly arranged on the workbench and provided with a plurality of them along the vertical direction. The driving shaft of each first rotation source is fixedly connected with a support rod, the support rod is rotationally connected with the workbench, the support rod is fixedly sleeved with a roller base body, and adjacent two roller base bodies extrude the copper strip. The inner side wall of the roller base body is fixedly connected with a reinforcing rib, and the height of the reinforcing rib gradually increases from the middle of the roller base body to both ends. The present invention has the effect of improving the extrusion accuracy of the copper strip.

Description

Technical Field

[0001] The present invention relates to the technical field of copper strip processing devices, and particularly relates to a continuous extrusion device and method for copper strip processing. Background Art

[0002] Copper strip extrusion is a processing method in which a copper strip is placed in an extruder, and the copper strip is extruded into a desired shape and size by the extrusion force of rolling rollers. This method can be used to manufacture various copper products, such as wires, cables, connectors, etc. Copper strip extrusion is usually used to manufacture high-precision and high-quality copper products, which have excellent electrical conductivity and good mechanical properties.

[0003] Rolling rollers are important tools for extruding workpieces during metal manufacturing. They are usually made of high-strength alloy steel or other materials and are used to apply pressure to metal plates, bars or tubes, so that the materials are deformed, flattened or stretched, and finally the desired shape and size are obtained.

[0004] For example, in a patent document with the publication number CN103025527B and the theme name of a method for repairing a rolling roller and a rolling roller, a covering is provided on the outer surface of the roller base body, and a bearing support assembly is inserted into each area at both ends of the roller base body. The outer side of the bearing support assembly is connected to the inner side of the roller base body by adhesion. The inner side of the bearing support assembly has been ground to form an inner surface that abuts against the outer ring of the roller bearing. The inner ring of the roller bearing is arranged on a shaft, and the shaft is used to carry the rolling roller.

[0005] In view of the above related technologies, when the rolling roller extrudes the copper strip below, the rolling roller presses down on the copper strip, and at the same time, the rolling roller receives an upward extrusion force from the copper strip. The rolling roller will bend and deform upward under the extrusion force. When the bent and deformed rolling roller processes the copper strip, it will affect the extrusion accuracy of the rolling roller on the copper strip and have a negative impact on the quality of the copper strip finished product. Summary of the Invention

[0006] In view of this, the present invention provides a continuous extrusion device and method for copper strip processing, aiming to solve the problem that the roller base body bends and deforms upward under pressure, reducing the extrusion accuracy of the roller on the copper strip.

[0007] To solve the above technical problems, in a first aspect, the present invention provides a continuous extrusion device for copper strip processing, including a workbench erected on a horizontal plane; a first rotation source fixedly arranged on the workbench, there are two first rotation sources arranged along the vertical direction, a support rod is fixedly connected to the driving shaft of each first rotation source, the support rod is rotationally connected to the workbench, a roller base body is fixedly sleeved on the support rod, the two roller base bodies extrude the copper strip, a reinforcing rib is fixedly connected to the inner side wall of the roller base body, and the height of the edge of the reinforcing rib from the roller base body gradually increases from the middle of the roller base body to both ends.

[0008] By adopting the above technical solution, the pressing roller base extrudes the copper strip, and the copper strip generates a reaction extrusion force on the pressing roller base. This reaction force is evenly distributed along the axial direction of the pressing roller base. Thus, the internal pressure distribution of the pressing roller base gradually increases from the middle to both ends of the pressing roller base. The reinforcing ribs are designed with reference to the magnitude of the internal extrusion force of the pressing roller base, improving the support and strengthening effect of the reinforcing ribs on the pressing roller base, reducing the deformation amount of the pressing roller base, and improving the precision of the pressing roller base for extruding the copper strip.

[0009] Optionally, a plurality of pressing roller bases are arranged along the length direction of the workbench. The pressing roller base includes a heating roller and a cooling roller respectively arranged at both ends of the workbench. The pressing roller base is filled with heat-conducting oil for maintaining the temperature of the pressing roller base, and a temperature control mechanism for controlling the temperature of the heat-conducting oil is arranged on the side of the workbench.

[0010] By adopting the above technical solution, the height of the reinforcing ribs gradually increases from the middle to both ends of the pressing roller base, so that the contact area between the reinforcing ribs and the heat-conducting oil gradually increases from the middle to both ends of the pressing roller base, increasing the power of the heat-conducting oil located at both ends of the pressing roller base to transfer heat to the pressing roller base, and improving the axial heat reception uniformity of the pressing roller base.

[0011] Optionally, the gap between the support rod and the pressing roller base is an oil delivery cavity. A receiving cavity for the heat-conducting oil to flow through is opened in the support rod, and a material delivery hole is opened on the side wall of the support rod. Both the receiving cavity and the oil delivery cavity are communicated with the inside of the material delivery hole.

[0012] Optionally, a material pressing tube is slidably connected in the receiving cavity. The material pressing tube is provided with a flow control hole that can coincide with the material delivery hole. The material pressing tube is threadedly connected with a transmission screw rod, and a second rotation source is fixedly installed on the side wall of the pressing roller base. The second rotation source is fixedly connected with the transmission screw rod.

[0013] By adopting the above technical solution, when the temperature on one side of the pressing roller base is relatively low, the material pressing tube is moved to increase the overlapping area between the flow control hole and the material delivery hole on the side of the pressing roller base with relatively low temperature, thereby increasing the amount of heat-conducting oil flowing to the side of the pressing roller base with relatively low temperature, and further improving the axial temperature distribution uniformity of the pressing roller base.

[0014] Optionally, the temperature control mechanism includes an eddy current rod box arranged on the side of the workbench. The eddy current rod box is fixedly communicated with a heat exchanger and a cold exchanger. The heat exchanger is fixedly communicated with a first oil delivery pipe for delivering heat-conducting oil to the heating roller. The heating roller is fixedly communicated with a first return pipe for delivering heat-conducting oil to the heat exchanger. The cold exchanger is fixedly communicated with a second oil delivery pipe for delivering heat-conducting oil to the heating roller. The cooling roller is fixedly communicated with a second return pipe for delivering heat-conducting oil to the cold exchanger.

[0015] Optionally, temperature sensors are fixedly installed on the side walls at both ends of the pressure roller base body.

[0016] By adopting the above technical solution, the temperature sensors detect the temperatures at both ends of the pressure roller base body, feedback the temperature difference information on both sides of the pressure roller base body, and thus control the second rotation source to drive the material pressing pipe to move.

[0017] Optionally, limiting rings are fixedly sleeved at both ends of the outer side wall of the pressure roller base body, and the limiting rings are in contact with the side wall of the copper strip.

[0018] By adopting the above technical solution, the limiting rings are in contact with the side wall of the copper strip, so as to adjust the position of the copper strip along the axial direction of the pressure roller base body and reduce the offset distance of the copper strip when it is extruded.

[0019] In a second aspect, the present invention provides a continuous extrusion method for copper strip processing, which is applied to the continuous extrusion device for copper strip processing described in the first aspect. The extrusion method is as follows:

[0020] S1, the eddy current rod box outputs hot air flow and cold air flow. The hot air flow heats the heat conduction oil in the heat exchanger, and the heat exchanger conveys the heat conduction oil into the heating roller.

[0021] S2, the cold air flow cools the heat conduction oil in the cold exchanger, and the cold exchanger conveys the heat conduction oil into the cooling roller.

[0022] S3, the first rotation source drives the pressure roller base body to rotate self - clockwise. Two adjacent heating rollers in the vertical direction heat and extrude the copper strip. The heating rollers transport the copper strip to the cooling roller, and then the cooling roller extrudes and cools and shapes the copper strip.

[0023] By adopting the above technical solution, when the heating roller extrudes the copper strip, it heats and softens the copper strip, making it easy for the copper strip to be extruded and deformed. After the copper strip is extruded by the heating roller, the cooling roller cools and shapes the copper strip to improve the hardness of the copper strip product.

[0024] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects:

[0025] 1. The pressure roller base body extrudes the copper strip, and the copper strip generates a reaction extrusion force on the pressure roller base body. This reaction force is directed radially towards the inside of the pressure roller base body and is evenly distributed along the axial direction of the pressure roller base body. The internal pressure distribution of the pressure roller base body gradually increases from the middle to both ends of the pressure roller base body. Designing the reinforcing ribs with reference to the magnitude of the internal extrusion force of the pressure roller base body improves the support and strengthening effect of the reinforcing ribs on the pressure roller base body, reduces the deformation amount of the pressure roller base body, and improves the precision of the pressure roller base body for extruding the copper strip.

[0026] 2. The height of the reinforcing rib gradually increases from the middle of the roller base to both ends, so that the contact area between the reinforcing rib and the heat-conducting oil gradually increases from the middle of the roller base to both ends. This increases the heat transfer power of the heat-conducting oil located at both ends of the roller base to the roller base, and improves the uniformity of the roller base being heated axially. Besides supporting the roller base according to the magnitude of the internal pressure of the roller base, the reinforcing rib also helps the roller base to be heated uniformly axially. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of the internal structure of the roller base in an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the reinforcing rib in an embodiment of the present invention;

[0030] Figure 4 is an embodiment of the present invention Figure 2 a partial enlarged view of area A therein;

[0031] Figure 5 is a schematic diagram of the structure of the first oil delivery pipe and the first return pipe in an embodiment of the present invention.

[0032] DESCRIPTION OF THE REFERENCE NUMERALS: 1. Workbench; 2. First rotation source; 3. Support rod; 31. Accommodation cavity; 32. Feeding hole; 4. Roller base; 41. Reinforcing rib; 42. Heating roller; 43. Cooling roller; 44. Limiting ring; 45. Oil delivery cavity; 6. Temperature control mechanism; 61. Eddy current rod box; 62. Heat exchanger; 63. Cold exchanger; 64. First oil delivery pipe; 65. First return pipe; 66. Second oil delivery pipe; 67. Second return pipe; 7. Material pressing pipe; 71. Flow control hole; 72. Transmission screw; 73. Second rotation source; 8. Temperature sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the Figures 1-5 of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0034] This embodiment provides a continuous extrusion device for copper strip processing. Refer to Figure 1 、 Figure 2 and Figure 3, A continuous extrusion device for copper strip processing includes a workbench 1. Two first rotating sources 2 are fixedly installed on the side wall of the workbench 1 in the vertical direction. The driving shaft of each first rotating source 2 is fixedly connected with a support rod 3, and the support rod 3 is rotatably connected with the workbench 1. A roller base 4 is fixedly sleeved on the support rod 3, and the copper strip passes through between the two roller bases 4. A plurality of reinforcing ribs 41 are fixedly connected to the inner side wall of the roller base 4 along the circumferential direction, and the height of the edge of the reinforcing rib 41 from the roller base 4 gradually increases from the middle of the roller base 4 to both ends.

[0035] The roller base 4 extrudes the copper strip, and the copper strip generates a reaction extrusion force on the roller base 4. This reaction force is radially directed towards the inside of the roller base 4, and this reaction force is uniformly distributed along the axial direction of the roller base 4. The distribution of the internal pressure of the roller base 4 gradually increases from the middle of the roller base 4 to both ends. The reinforcing ribs 41 are designed with reference to the magnitude of the internal extrusion force of the roller base 4, which improves the support and strengthening effect of the reinforcing ribs 41 on the roller base 4, reduces the deformation amount of the roller base 4, and improves the precision of the roller base 4 in extruding the copper strip.

[0036] Refer to Figure 1 and Figure 2 , A plurality of roller bases 4 are arranged along the length direction of the workbench 1. The roller base 4 includes a heating roller 42 and a cooling roller 43 respectively arranged at both ends of the workbench 1, and the copper strip is transported from the heating roller 42 to the cooling roller 43. The roller base 4 is filled with heat-conducting oil for maintaining the temperature of the roller base 4. The heating roller 42 and the cooling roller 43 have the same structure, and the temperatures of the heat-conducting oil inside the heating roller 42 and the cooling roller 43 are different. Specifically, the heat-conducting oil can be silicone oil, mineral oil or synthetic oil. A temperature control mechanism 6 for controlling the temperature of the heat-conducting oil is arranged on the side of the workbench 1.

[0037] Refer to Figure 1 and Figure 2 , The gap between the support rod 3 and the roller base 4 is an oil delivery cavity 45. A receiving cavity 31 for the circulation of the heat-conducting oil is opened in the support rod 3. A plurality of feeding holes 32 for delivering the heat-conducting oil in the receiving cavity 31 to the inside of the roller base 4 are opened on the side wall of the support rod 3. The feeding holes 32 are arranged on both sides of the middle section of the support rod 3 along the axial direction, and one end of each feeding hole 32 away from the receiving cavity 31 is inclined near the end of the support rod 3. The receiving cavity 31 and the oil delivery cavity 45 are both communicated with the inside of the feeding holes 32.

[0038] Extrusion causes work hardening of the material, which will limit the further deformation of the material. Therefore, the heating roller 42 heats and softens the copper strip when extruding the copper strip, making it easy for the copper strip to be extruded and deformed. After the copper strip is extruded by the heating roller 42, the cooling roller 43 cools and shapes the copper strip, and at the same time improves the hardness of the copper strip product. Using heat-conducting oil to control the temperature of the heating roller 42 and the cooling roller 43 increases the uniformity of heat transfer of the heating roller 42 and the cooling roller 43, and further increases the uniformity of heat absorption of the copper strip.

[0039] When inside the heating roller 42, the heat-conducting oil flows from the middle of the roller base 4 to both sides through the material conveying holes 32. During the flowing process, the heat-conducting oil transfers heat to the roller base 4. Thus, the heat of the heat-conducting oil in the middle of the roller base 4 is greater than that of the heat-conducting oil at both ends of the roller base 4. The height of the reinforcing ribs 41 gradually increases from the middle of the roller base 4 to both ends, so that the contact area between the reinforcing ribs 41 and the heat-conducting oil gradually increases from the middle of the roller base 4 to both ends. This increases the power of the heat-conducting oil at both ends of the roller base 4 to transfer heat to the roller base 4 through the reinforcing ribs 41, improves the uniformity of the axial heat reception of the roller base 4, which is conducive to the uniform heating of the copper strip, reduces the difficulty of the roller base 4 extruding the copper strip to deform, and improves the efficiency of the roller base 4 extruding the copper strip. Therefore, in addition to supporting the roller base 4 according to the magnitude of the internal pressure of the roller base 4, the reinforcing ribs 41 are also conducive to the uniform axial heat reception of the roller base 4. The same applies to the inside of the cooling roller 43.

[0040] Refer to Figure 1 、 Figure 2 and Figure 4 As shown in, temperature sensors 8 are respectively fixedly installed on the side walls at both ends of the roller base 4. A material pressing tube 7 is slidably connected in the accommodating cavity 31. The material pressing tube 7 is provided with a flow control hole 71 that can coincide with the material conveying hole 32. The material pressing tube 7 is threadedly connected with a transmission screw rod 72. A second rotation source 73 is fixedly installed on the side wall of the roller base 4, and the second rotation source 73 is fixedly connected with the transmission screw rod 72.

[0041] The second rotation source 73 drives the transmission screw rod 72 to rotate, thereby driving the material pressing tube 7 to move axially along the accommodating cavity 31, and adjusting the position of the flow control hole 71 relative to the material conveying hole 32 according to the temperature difference between the temperature sensors 8 at both ends of the roller base 4. Inside the heating roller 42, when the temperature on one side of the roller base 4 is relatively low, the second rotation source 73 drives the material pressing tube 7 to move closer to the side with relatively low temperature of the roller base 4 through the transmission screw rod 72, increasing the overlapping area between the flow control hole 71 and the material conveying hole 32 on the side with relatively low temperature of the roller base 4, thereby increasing the amount of the heat-conducting oil flowing to the side with relatively low temperature of the roller base 4, and further improving the uniformity of the axial temperature distribution of the roller base 4. The same applies to the inside of the cooling roller 43.

[0042] Refer to Figure 1 、 Figure 2 and Figure 5, the temperature control mechanism 6 includes a vortex rod box 61, a heat exchanger 62, a cold exchanger 63, a first oil pipeline 64, a first return pipeline 65, a second oil pipeline 66 and a second return pipeline 67. The vortex rod box 61 is fixedly arranged on the side of the workbench 1. The vortex rods inside the vortex rod box 61 can simultaneously separate hot air flow and cold air flow. Both the heat exchanger 62 and the cold exchanger 63 are communicated with the inside of the vortex rod box 61. The hot air flow flows into the heat exchanger 62, and the cold air flow flows into the cold exchanger 63. The heat exchanger 62 and the accommodation cavity 31 inside the heating roller 42 are respectively communicated with both ends of the first oil pipeline 64, and the heat exchanger 62 and the oil delivery cavity 45 inside the heating roller 42 are respectively communicated with both ends of the first return pipeline 65. The heat conducting oil in the heat exchanger 62 circulates through the heat exchanger 62, the first oil pipeline 64, the accommodation cavity 31 inside the heating roller 42, the oil delivery cavity 45 inside the heating roller 42 and the first return pipeline 65. The cold exchanger 63 and the accommodation cavity 31 inside the cooling roller 43 are respectively communicated with both ends of the second oil pipeline 66, and the cold exchanger 63 and the oil delivery cavity 45 inside the cooling roller 43 are respectively communicated with both ends of the second return pipeline 67. The heat conducting oil in the cold exchanger 63 circulates through the cold exchanger 63, the second oil pipeline 66, the accommodation cavity 31 inside the cooling roller 43, the oil delivery cavity 45 inside the cooling roller 43 and the second return pipeline 67.

[0043] Refer to Figure 5 , at both ends of the outer side wall of the press roller base 4, limiting rings 44 are fixedly sleeved. The limiting rings 44 are in contact with the side wall of the copper strip, thereby adjusting the position of the copper strip along the axial direction of the press roller base 4 and reducing the offset distance of the copper strip when it is squeezed.

[0044] The implementation principle of a continuous extrusion device for copper strip processing in an embodiment of the present invention is as follows: The vortex rod box 61 outputs hot air flow and cold air flow. The hot air flow heats the heat conducting oil in the heat exchanger 62, and the heat conducting oil in the heat exchanger 62 is transported to the heating roller 42 through the first oil pipeline 64. The cold air flow cools the heat conducting oil in the cold exchanger 63, and the heat conducting oil in the cold exchanger 63 is transported to the cooling roller 43 through the second oil pipeline 66. The first rotation source 2 drives the press roller base 4 to rotate self - sufficiently. Two adjacent heating rollers 42 in the vertical direction heat and squeeze the copper strip. The heating roller 42 transports the copper strip to the cooling roller 43, and then the cooling roller 43 squeezes and cools and shapes the copper strip.

[0045] In the second aspect, an embodiment of the present invention provides a continuous extrusion method for copper strip processing, which is applied to a continuous extrusion device for copper strip processing in the first aspect. The extrusion method is as follows:

[0046] S1, the vortex rod box 61 outputs hot air flow and cold air flow. The hot air flow heats the heat conducting oil in the heat exchanger 62, and the heat exchanger 62 transports the heat conducting oil into the heating roller 42;

[0047] S2. The cold air flow cools the heat-conducting oil in the cold exchanger 63, and the cold exchanger 63 conveys the heat-conducting oil into the cooling roller 43;

[0048] S3. The first rotating source 2 drives the roller base body 4 to rotate self, and two adjacent heating rollers 42 in the vertical direction heat and extrude the copper strip. The heating rollers 42 transport the copper strip to the cooling roller 43, and then the cooling roller 43 extrudes and cools and shapes the copper strip.

[0049] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0050] The above are the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A continuous extrusion device for copper strip processing, comprising a workbench erected on a horizontal plane, characterized in that: Also includes: A first rotating source is fixedly arranged on the workbench, and two first rotating sources are arranged in the vertical direction. The driving shaft of each first rotating source is fixedly connected to a support rod, and the support rod is rotatably connected to the workbench. A roller base is fixedly sleeved on the support rod, and the two roller bases extrude the copper strip. A reinforcing rib is fixedly connected to the inner side wall of the roller base, and the height of the edge of the reinforcing rib from the roller base gradually increases from the middle of the roller base to both ends; a plurality of roller bases are arranged along the length direction of the workbench, and the roller bases include a heating roller and a cooling roller respectively arranged at both ends of the workbench, and the roller base is filled with heat transfer oil for maintaining the temperature of the roller base, and a temperature control mechanism for controlling the temperature of the heat transfer oil is arranged on the side of the workbench; The gap between the support rod and the roller base is an oil delivery cavity, a receiving cavity for circulating the heat transfer oil is provided in the support rod, a material delivery hole is provided on the side wall of the support rod, and both the receiving cavity and the oil delivery cavity are connected to the inside of the material delivery hole; A material-resisting tube is slidably connected in the accommodating cavity. The material-resisting tube is provided with a flow control hole which can overlap with the material feeding hole. The material-resisting tube is threadedly connected with a transmission screw. A second rotation source is fixedly installed on the side wall of the pressure roller base, and the second rotation source is fixedly connected to the transmission screw.

2. A continuous extrusion device for copper strip processing according to claim 1, characterized in that: The temperature control mechanism includes an eddy current rod box arranged on the side of the workbench, the eddy current rod box is fixedly connected to a heat exchanger and a cold exchanger, the heat exchanger is fixedly connected to a first oil pipeline for conveying heat-conducting oil to the heating roller, the heating roller is fixedly connected to a first return pipe for conveying heat-conducting oil to the heat exchanger, the cold exchanger is fixedly connected to a second oil pipeline for conveying heat-conducting oil to the heating roller, and the cooling roller is fixedly connected to a second return pipe for conveying heat-conducting oil to the cold exchanger.

3. A continuous extrusion device for copper strip processing according to claim 1, characterized in that: Temperature sensors are fixedly mounted on the side walls at both ends of the pressure roller base.

4. A continuous extrusion device for copper strip processing according to claim 1, characterized in that: The two ends of the outer side wall of the pressing roller base body are fixedly sleeved with limiting rings, and the limiting rings are in contact with the side wall of the copper belt.

5. A continuous extrusion method for copper strip processing, applied to a continuous extrusion device for copper strip processing according to claim 2, characterized in that: include: S1, the vortex rod box outputs hot air flow and cold air flow, the hot air flow heats the heat transfer oil in the heat exchanger, and the heat exchanger transports the heat transfer oil into the heating roller; S2, a cold air flow cools the heat transfer oil in the cold exchanger, and the cold exchanger delivers the heat transfer oil to the cooling roller; S3, the first rotation source drives the pressure roller base to rotate, and the two adjacent heating rollers in the vertical direction heat and extrude the copper strip, the heating roller transports the copper strip to the cooling roller, and then the cooling roller extrude and cool the copper strip to shape it.

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