Special-shaped copper strip floating type composite withdrawal and straightening device

Abstract

The invention relates to a floating type composite withdrawal and straightening device for a special-shaped copper strip. A floating type unreeling machine is sequentially connected with an inlet pinch roll, a head-cutting inclined shearing machine, a pressing plate device, an inlet S roll set and a composite withdrawal and straightening machine. A CPC centering system is arranged between the floating type unreeling machine and the inlet pinch roll, and a middle EPC edge aligning system is arranged between the inlet S roll set and the composite withdrawal and straightening machine. The composite withdrawal and straightening machine is sequentially connected with an outlet S roller set, a slitting shear, an outlet pinch roller and a floating type winding machine. And an outlet EPC edge aligning system is arranged between the outlet pinch roll and the floating winding machine. According to the invention, the CPC centering system and the EPC edge aligning system are adopted to carry out double deviation correction on the withdrawal and straightening copper strip, so that the special-shaped copper strip can be accurately positioned in the straightening process; the floating type winding / unwinding device and the special-shaped rollers with the expansion and contraction adjusting function are adopted, so that the copper strip straightening machine can be suitable for straightening copper strips with different winding diameters and thicknesses, the application range of the equipment is widened, and the input cost of a production enterprise is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of special-shaped strip processing, and in particular to a floating composite straightening device for special-shaped copper strips. Background Art

[0002] Due to its unique cross-sectional shape and excellent thermal, electrical and mechanical properties, special-shaped copper strips are widely used in communication technology, consumer electronics, electrical engineering and other fields. Common cross-sections of special-shaped copper strips are T / U / M or a combination of the above, among which T-shaped copper strips are the most widely used. At present, the processing methods of T-shaped copper strips are mainly rolling or forging processes. Although they can initially meet production needs, they face many technical challenges in actual production.

[0003] Affected by multiple factors such as chemical composition uniformity, roller grinding quality, rolling and annealing process, T-shaped copper strips often have uneven thickness and inconsistent extension during processing, which leads to stress concentration inside the strip and excessive residual stress. This residual stress will affect the stability of the material in the subsequent stamping process, causing distortion and bulging in the mold, which can easily cause "mold jamming". In severe cases, the lead frame made of T-shaped copper strips will deform due to stress release, resulting in quality problems such as chip welding detachment or loose plastic sealing, affecting the reliability and stability of the entire electronic product.

[0004] At present, the existing straightening equipment in China is mainly used for flat strip straightening and stress improvement. Due to the special shape of special-shaped strips, the following problems often exist in the straightening process: 1. Special-shaped strips need to be processed with special straightening rollers, which cannot be accurately positioned during the straightening process, easily causing secondary crushing of the profiles; 2. Different customers have different requirements for the coil diameter of the strip, and the existing winding / unwinding devices mostly adopt a fixed structure, which cannot meet the use requirements of different customers; 3. The working roller of the stretch bending straightening machine is related to the thickness of the strip to be straightened. One roller diameter can only adapt to a certain range of strip thickness, which is relatively costly for manufacturers.

[0005] In summary, in order to overcome the shortcomings of the existing technology, improve the processing quality and production efficiency of special-shaped copper strips, and reduce quality defects caused by stress problems, designing and developing a straightening device suitable for special-shaped copper strips is of great significance for achieving effective straightening and stress improvement of special-shaped copper strips. Summary of the invention

[0006] In view of the problems in the above-mentioned prior art that the special-shaped copper strip cannot be accurately positioned during the straightening process, the winding / unwinding device cannot be applied to strips with different coil diameters, and the working rollers of the straightening machine can only adapt to a certain range of strip thicknesses, the present invention provides a floating composite pulling and straightening device for special-shaped copper strip, which can perform double deviation correction on the pulled and straightened copper strip and is applicable to strips with different coil diameters and thicknesses.

[0007] To achieve the above object, the technical solution of the present invention is as follows:

[0008] A floating composite straightening device for special-shaped copper strips comprises a floating unwinder and a composite straightening machine; a paper take-up machine is arranged below the floating unwinder, and the floating unwinder is sequentially connected to an inlet pinch roller, a cropping and beveling shear, a pressure plate device, an inlet S roller group and a composite straightening machine; a CPC centering system is arranged between the floating unwinder and the inlet pinch roller, and an intermediate EPC edge alignment system is arranged between the inlet S roller group and the composite straightening machine; the composite straightening machine is sequentially connected to an outlet S roller group, a slitting shear, an outlet pinch roller and a floating winder; an outlet EPC edge alignment system is arranged between the outlet pinch roller and the floating winder; a lining paper machine is arranged below the floating winder.

[0009] Furthermore, the compound tensioning and straightening machine comprises a frame, and the frame comprises an upper frame and a lower frame.

[0010] Furthermore, a first stretching, bending and straightening unit, a second stretching, bending and straightening unit and a parallel roller straightening unit are sequentially arranged in the frame.

[0011] Furthermore, the straightening unit comprises a special-shaped roller with an expansion and contraction adjustment function, and the special-shaped roller comprises a winding shaft, an expansion and contraction connecting rod and an expansion and contraction sliding block.

[0012] Further, the parallel roller straightening unit comprises an upper roller box and a lower roller box, wherein the upper roller box is arranged at the bottom of the upper frame, and the lower roller box is arranged at the top of the lower frame.

[0013] Furthermore, a pressing mechanism is provided on the upper portion of the parallel roller straightening unit.

[0014] Furthermore, the upper frame and the lower frame are connected by a hinge at one end and by bolts at the other end.

[0015] Furthermore, a pressure roller is provided on the floating unwinding machine.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides a floating composite straightening device for special-shaped copper strips. The composite straightening device adopts a CPC centering system and an EPC edge alignment system to perform double deviation correction on the straightening copper strip, so that the special-shaped copper strip can be accurately positioned during the straightening process, avoiding the occurrence of crush defects in the special-shaped copper strip products after straightening, improving product quality, and ensuring the stability of the product during operation; the composite straightening device also integrates a floating winding / unwinding device, and can be suitable for straightening operations of copper strips with different winding diameters. At the same time, the straightening unit adopts a special-shaped roller with an expansion and contraction adjustment function, and can be suitable for straightening operations of copper strips with different thicknesses, thereby broadening the scope of use of the equipment and reducing the investment cost of the production enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The embodiments of the present invention are further described below with reference to the accompanying drawings, in which:

[0019] Figure 1 A structural schematic diagram of an embodiment of a floating composite straightening device for a profiled copper strip is shown;

[0020] Figure 2 A schematic diagram of the structure of a special-shaped roller with expansion and contraction adjustment function is shown;

[0021] Figure identification: 1-paper receiving machine, 2-floating unwinder, 3-CPC centering system, 4-entrance pinch roller, 5-crop diagonal shear, 6-pressing plate device, 7-entrance S roller group, 8-middle EPC edge alignment system, 9-compound tensioning and straightening machine, 10-exit S roller group, 11-slitting shear, 12-exit pinch roller, 13-exit EPC edge alignment system, 14-floating winder, 15-liner, 16-winding shaft, 17-expansion and contraction connecting rod, 18-expansion and contraction slider. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] Reference Figure 1A floating composite straightening device for a special-shaped copper strip comprises a floating unwinder 2 and a composite straightening machine 9; a paper collecting machine 1 is arranged below the floating unwinder 2, and the floating unwinder 2 is sequentially connected to an inlet pinch roller 4, a cropping and beveling shear 5, a pressing plate device 6, an inlet S roller group 7 and a composite straightening machine 9; a CPC centering system 3 is arranged between the floating unwinder 2 and the inlet pinch roller 4, and an intermediate EPC edge alignment system 8 is arranged between the inlet S roller group 7 and the composite straightening machine 9; the composite straightening machine 9 is sequentially connected to an outlet S roller group 10, a slitting shear 11, an outlet pinch roller 12 and a floating winder 14; an outlet EPC edge alignment system 13 is arranged between the outlet pinch roller 12 and the floating winder 14; a lining paper machine 15 is arranged below the floating winder 14, and lining paper is padded between the strips to protect the surface of the strips from damage.

[0024] In one embodiment of the present invention, the compound tension and leveling machine 9 comprises a frame, and the frame comprises an upper frame and a lower frame.

[0025] In one embodiment of the present invention, a first stretching, bending and straightening unit, a second stretching, bending and straightening unit and a parallel roller straightening unit are sequentially arranged in the frame.

[0026] Reference Figure 2 In one embodiment of the present invention, the straightening unit includes a profiled roller with an expansion and contraction adjustment function, and the profiled roller includes a winding shaft 16, an expansion and contraction connecting rod 17 and an expansion and contraction slider 18.

[0027] In one embodiment of the present invention, the parallel roller straightening unit comprises an upper roller cassette and a lower roller cassette, wherein the upper roller cassette is arranged at the bottom of the upper frame and the lower roller cassette is arranged at the top of the lower frame.

[0028] In one embodiment of the present invention, a pressing mechanism is provided on the upper portion of the parallel roller straightening unit, and the height of the pressing mechanism is adjusted to thereby adjust the spacing between the upper and lower working rollers of the parallel straightening unit.

[0029] In one embodiment of the present invention, the upper frame and the lower frame are connected by hinges at one end and bolts at the other end. When the composite straightening machine 9 needs to be opened, the bolts are loosened to support the machine with the hinge axis as the rotation center.

[0030] In one embodiment of the present invention, a pressure roller is provided on the floating unwinding machine 2 to prevent the special-shaped copper strip roll from unwinding.

[0031] When in use, place the special-shaped copper strip coil to be processed at the appropriate position of the reel of the floating unwinder 2, and tighten the reel. Use the pressure roller on the floating unwinder 2 to press the copper strip coil, and the floating unwinder 2 adopts the upper unwinding working mode. With the assistance of the floating unwinder 2, the copper strip head is manually sent to the entrance pinch roller 4. The lower roller of the entrance pinch roller 4 moves up under the drive of the oil cylinder to clamp the copper strip head. When the strip is threaded for the first time, the copper strip head passes through the head cutting and beveling shear 5, the pressure plate device 6, the entrance S roller group 7, the compound tensioning and straightening machine 9 and the exit S roller group 10 in sequence, and reaches the slitting shear 11. The slitting shear 11 cuts off the irregular copper strip head, and then the copper strip head reaches the exit pinch roller 12. Under the drive of the exit pinch roller 12, the regular copper strip head reaches the jaws of the floating winder 14. When the strip is threaded for the second time and thereafter, the tail of the copper strip threaded for the first time slowly stays at the head-cutting and beveling shearing machine 5, which cuts off the tail of the copper strip obliquely, and under the traction of the entrance pinch roller 4, the tail of the copper strip reaches the pressing plate device 6, which presses down and clamps the tail of the copper strip. The head of the newly rolled copper strip reaches the head-cutting and beveling shearing machine 5 driven by the floating unwinder 2 and the entrance pinch roller 4, which cuts off the head of the newly rolled copper strip obliquely, and under the traction of the entrance pinch roller 4, the head of the newly rolled copper strip reaches the pressing plate device 6, so that the tail of the copper strip threaded for the first time and the head of the newly rolled copper strip are aligned, and the pressing plate device 6 presses down and clamps the head of the newly rolled copper strip, and the copper strip head and the tail are connected together by manual welding, and the weld is cleaned. Driven by the floating winder 14, the weld passes through the inlet S roller group 7, the compound tension and leveling machine 9 and the outlet S roller group 10 in sequence, and reaches the slitting shear 11. The slitting shear 11 cuts off the weld, and after separation, the previous copper strip is completely rolled up under the drive of the floating winder 14. The floating winder 14 reels down, and the previous copper strip is taken off the reel of the floating winder 14 and put into the storage. The head of the next copper strip reaches the jaws of the floating winder 14 under the drive of the outlet pinch roller 12. This process is the threading process.

[0032] When the copper strip head passes through the inlet S roller group 7, the CPC centering system 3 is put into use; when the copper strip head passes through the outlet S roller group 10, the intermediate EPC edge alignment system 8 is put into use; when the floating winder 14 clamps the copper strip head and starts winding, the outlet EPC edge alignment system 13 is put into use.

[0033] When the linkage conditions of the unit are met, the unit starts to build tension. At this time, the pressure roller of the floating unwinder 2 is in the raised position, and the inlet S roller group 7 and the outlet S roller group 10 are in the middle position. The head cutting shear 5 and the slitting shear 11 are in the open position. The inlet pinch roller 4 and the outlet pinch roller 12 are in the closed position. Start the unit to run at a low speed, close the composite tension and leveling machine 9 according to the process requirements, adjust the upper and lower working rollers to the appropriate working position, check the operating status of each process section, and observe whether the plate shape meets the production requirements. After confirmation, increase the speed and start normal production.

[0034] After the unit runs stably, the composite tension and leveling process parameters are adjusted. The special-shaped copper alloy strip is subjected to 0.5-1% and 1-2% elongation respectively when entering the first stretch bending and straightening unit and the second stretch bending and straightening unit; when the strip after the above bending and straightening enters the parallel roller straightening unit, it is subjected to 0.5-1% elongation. In this process, the deformation of the copper alloy strip increases from small to large, and then gradually decreases.

[0035] The present invention provides a floating composite straightening device for special-shaped copper strips. The composite straightening device adopts a CPC centering system and an EPC edge alignment system to perform double deviation correction on the straightening copper strip, so that the special-shaped copper strip can be accurately positioned during the straightening process, avoiding the occurrence of crush defects in the special-shaped copper strip products after straightening, improving product quality, and ensuring the stability of the product during operation; the composite straightening device also integrates a floating winding / unwinding device, and can be suitable for straightening operations of copper strips with different winding diameters. At the same time, the straightening unit adopts a special-shaped roller with an expansion and contraction adjustment function, and can be suitable for straightening operations of copper strips with different thicknesses, thereby broadening the scope of use of the equipment and reducing the investment cost of the production enterprise.

[0036] Some exemplary embodiments of the present invention are described above. It can be understood that the above embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention. The features in these embodiments can be recombined in a suitable manner, and the scheme obtained thereby is still within the protection scope required by the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without making creative work, that is, all modifications, equivalent substitutions and improvements made within the spirit and principles of this application, fall within the protection scope required by the present invention.

Claims

1. A floating composite straightening device for special-shaped copper strips, characterized in that: The invention comprises a floating unwinder (2) and a composite tension and straightening machine (9); a paper collecting machine (1) is arranged below the floating unwinder (2); the floating unwinder (2) is sequentially connected to an inlet pinch roller (4), a head cutting and beveling shear (5), a pressure plate device (6), an inlet S roller group (7) and a composite tension and straightening machine (9); a CPC centering system (3) is arranged between the floating unwinder (2) and the inlet pinch roller (4); an intermediate EPC edge alignment system (8) is arranged between the inlet S roller group (7) and the composite tension and straightening machine (9); the composite tension and straightening machine (9) is sequentially connected to an outlet S roller group (10), a slitting shear (11), an outlet pinch roller (12) and a floating winder (14); an outlet EPC edge alignment system (13) is arranged between the outlet pinch roller (12) and the floating winder (14); a lining paper machine (15) is arranged below the floating winder (14).

2. The floating composite straightening device for special-shaped copper strip according to claim 1 is characterized in that: The composite tensioning and straightening machine (9) comprises a frame, and the frame comprises an upper frame and a lower frame.

3. The floating composite straightening device for special-shaped copper strip according to claim 2 is characterized in that: The frame is provided with a first stretching, bending and straightening unit, a second stretching, bending and straightening unit and a parallel roller straightening unit in sequence.

4. The floating composite straightening device for special-shaped copper strip according to claim 3 is characterized in that: The straightening unit comprises a special-shaped roller with an expansion and contraction adjustment function, and the special-shaped roller comprises a winding shaft (16), an expansion and contraction connecting rod (17) and an expansion and contraction sliding block (18).

5. A floating composite straightening device for special-shaped copper strip according to claim 3 or 4, characterized in that: The parallel roller straightening unit comprises an upper roller box and a lower roller box, wherein the upper roller box is arranged at the bottom of the upper frame, and the lower roller box is arranged at the top of the lower frame.

6. The floating composite straightening device for special-shaped copper strip according to claim 5, characterized in that: A pressing mechanism is provided on the upper portion of the parallel roller straightening unit.

7. The floating composite straightening device for special-shaped copper strip according to claim 2, characterized in that: The upper frame and the lower frame are connected by a hinge at one end and by bolts at the other end.

8. The floating composite straightening device for special-shaped copper strip according to claim 1, characterized in that: The floating unwinding machine (2) is provided with a pressing roller.

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