An integrated device for milling and straightening resistor strips

Abstract

This invention provides an integrated milling and straightening device for resistance strips, used to process grooves on alloy strips. It includes a traction turntable and a cutting table and a shaping assembly arranged sequentially along the feeding direction of the alloy strip. The cutting table is equipped with a milling cutter used to cut grooves on the alloy strip. The shaping assembly includes a motor, a shaping base, a grinding wheel, and two follower wheels. A track is provided on the shaping base, and the two follower wheels are located on both sides of the track, with a shaping area between the two follower wheels. The output shaft of the motor is connected to the grinding wheel, which is located in the shaping area. The outer wall of the grinding wheel has a cutting edge that extends into the groove. A coupling is provided between the grinding wheel and the output shaft. This integrated milling and straightening device for resistance strips can perform grooving and shaping operations on alloy strips, improving processing efficiency while protecting the motor in case of jamming, reducing equipment maintenance costs, and extending the motor's service life.

Description

Technical Field

[0001] This invention relates to the field of resistor strip processing, and in particular to an integrated device for milling and straightening resistor strips. Background Technology

[0002] Before preparing alloy resistors, the alloy strip needs to be pretreated. When processing the groove between the two electrodes of the alloy resistor, if the grooving station is arranged after the alloy strip is granulated, grooving work needs to be carried out for each resistor particle, and each resistor particle needs to be clamped and positioned, which reduces the processing efficiency of the alloy resistor. Therefore, in the existing alloy resistor production process, the grooving station is arranged in the pretreatment work of the alloy strip.

[0003] The method of grooving on alloy strip involves configuring a winding structure to wind up the alloy strip and placing a milling cutter along the conveying path of the alloy strip. The milling cutter performs the grooving operation as the alloy strip moves forward. In this processing method, the alloy strip is a thin and soft component, and milling with the milling cutter can easily cause deformation of the alloy strip. Therefore, after cutting, the alloy strip needs to be rolled to shape it. During shaping, the outer surface and grooves of the alloy strip need to be squeezed. The burrs generated by the milling cutter can easily jam the roller shaft. Furthermore, the alloy strip itself is pulled forward by the winding structure. When jamming occurs, a torque reaction force is generated and acts on the output shaft of the motor, which can easily damage the motor connected to the roller shaft. In other words, the motor is prone to damage when a failure occurs, resulting in high maintenance costs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrated device for milling and straightening resistance strips, which avoids damage to the motor and its surrounding accessories caused by instantaneous torque when the material jams, and reduces the maintenance cost of the equipment.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A resistive strip milling and straightening integrated device for machining grooves on alloy strip, comprising: a traction turntable and a cutting table and a shaping assembly arranged sequentially along the feeding direction of the alloy strip;

[0007] The cutting table is equipped with a milling cutter, which is used to cut grooves on the alloy strip.

[0008] The shaping assembly includes a motor, a shaping base, a grinding wheel, and two follower wheels. The shaping base has a track, and the two follower wheels are located on both sides of the track. A shaping area is provided between the two follower wheels. The output shaft of the motor is connected to the grinding wheel, and the grinding wheel is located on the shaping area. The outer wall of the grinding wheel has a cutting edge that extends into the groove.

[0009] A coupling is provided between the grinding wheel and the output shaft.

[0010] In one embodiment, the coupling includes a connecting disc, a limiting ring, and a plurality of resistance rollers. The connecting disc is located at the end of the output shaft. The grinding wheel is rotatably mounted on the connecting disc. A polygonal boss is provided on the connecting disc within the grinding wheel, and a gap is provided between the polygonal boss and the inner cavity of the grinding wheel. The limiting ring is rotatably located within the gap between the polygonal boss and the grinding wheel. A plurality of through slots are provided on the limiting ring. The resistance rollers are located within the through slots, and the outer wall of the resistance rollers is tangent to one side of the polygonal boss. When the polygonal boss rotates, it presses against the resistance rollers, so that the resistance rollers abut against the inner cavity of the grinding wheel.

[0011] In one embodiment, the hardness of the resistance roller is less than that of the grinding wheel and the polygonal boss.

[0012] In one embodiment, the polygonal boss has a hexagonal cross-section, and the number of resistance rollers is the same as the number of sides of the polygonal boss.

[0013] In one embodiment, the width of the through groove is greater than the outer diameter of the resistance roller.

[0014] In one embodiment, the resistance roller is spherical in shape.

[0015] In one embodiment, the resistance roller is cylindrical in shape.

[0016] In one embodiment, the resistance roller includes a magnetic core and a soft outer sheath, the magnetic core being embedded within the soft outer sheath.

[0017] In one embodiment, the cutting table is provided with a pressure plate for covering the alloy strip, and the pressure plate has a clearance opening through which the milling cutter passes.

[0018] In one embodiment, an anti-bias block is provided between the milling cutter and the shaping component.

[0019] The integrated milling and straightening device for resistance strips can slot and shape alloy strips, improving processing efficiency while protecting the motor in case of jamming, reducing equipment maintenance costs and extending motor life. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the integrated device for milling and straightening resistor strips;

[0022] Figure 2 This is a schematic diagram of the cutting table structure;

[0023] Figure 3 This is a schematic diagram showing the disassembled coupling;

[0024] Figure 4 This is a schematic diagram showing the fit between the resistance roller, the follower wheel, and the polygonal boss.

[0025] Figure 5 This is a schematic diagram of the shaping area.

[0026] Reference numerals: 10. Integrated milling and straightening device for resistance strip; 1. Shaping area; 20. Alloy strip; 21. Groove; 100. Traction turntable; 200. Cutting table; 210. Milling cutter; 220. Pressure plate; 221. Clearance opening; 300. Shaping assembly; 310. Motor; 311. Output shaft; 320. Shaping seat; 321. Track; 330. Grinding wheel; 331. Cutting edge; 340. Follower wheel; 400. Coupling; 410. Connecting disc; 411. Polygonal boss; 420. Limiting ring; 421. Through groove; 430. Resistance roller; 500. Anti-eccentricity block. Detailed Implementation

[0027] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please see Figure 1 , Figure 2 and Figure 3 This invention provides an integrated milling and straightening device 10 for resistive strip, used to process grooves 21 on alloy strip 20. It includes a traction turntable 100 and a cutting table 200 and a shaping component 300 arranged sequentially along the feeding direction of the alloy strip 20. When the traction turntable 100 rotates, it winds up the alloy strip 20. Before being wound up, the strip passes through the cutting table 200 and the shaping component 300.

[0031] Please see Figure 1 A milling cutter 210 is provided on the cutting table 200. When the alloy strip 20 passes through the cutting table 200, the milling cutter 210 rotates and mills on the alloy strip 20 to form a groove 21.

[0032] Please see Figure 1 and Figure 3 The shaping assembly 300 includes a motor 310, a shaping base 320, a grinding wheel 330, and two follower wheels 340. A track 321 is provided on the shaping base 320, and the two follower wheels 340 are located on both sides of the track 321. A shaping area 1 is provided between the two follower wheels 340. Figure 5 As shown. The output shaft 311 on the motor 310 is connected to the grinding wheel 330, which is located on the shaping area 1. The outer wall of the grinding wheel 330 is provided with a cutting edge 331, which extends into the groove 21.

[0033] A coupling 400 is provided between the grinding wheel 330 and the output shaft 311.

[0034] The working principle of the above-mentioned integrated device 10 for milling and straightening of resistance strips is as follows:

[0035] The alloy strip 20 is passed through the cutting table 200 and the shaping assembly 300, and the end of the alloy strip 20 is fixed on the traction turntable 100, so that the surface to be machined on the alloy strip 20 faces the milling cutter 210. When the traction turntable 100 rotates, it pulls the alloy strip 20 to feed. During this process, the alloy strip 20 first passes through the milling cutter 210, and the milling cutter 210 cuts grooves 21 on it.

[0036] Because the alloy strip 20 is thin, the milling cutter 210 easily causes deformation during the cutting process. In this application, a shaping assembly 300 is configured along the conveying path of the alloy strip 20. The portion of the alloy strip 20 cut by the milling cutter 210 is fed into the shaping seat 320. When it enters the shaping area 1, two follower wheels 340 separately roll the two opposite sides of the alloy strip 20, and the cutting edge 331 of the grinding wheel 330 extends into the groove 21. While the follower wheels 340 roll the outer wall of the alloy strip 20 for shaping, the cutting edge 331 provides support to prevent the groove 21 from becoming concave due to rolling. This ensures that the external dimensions of the alloy strip 20 meet the standards and prevents changes in the dimensions of the groove 21 during the shaping process. Simultaneously, the motor 310 drives the grinding wheel 330 to rotate, using the cutting edge 331 to grind the inner side of the groove 21, removing burrs generated during the milling process of the milling cutter 210, thus ensuring the accuracy of the pre-processing of the alloy strip 20.

[0037] It should be noted that the deformation of the alloy strip 20 is mainly due to two factors. Firstly, dimensional errors occur during the production process, such as localized bending or unevenness. Secondly, the strip 20 has a small thickness and low rigidity, causing it to be squeezed against both sides of the groove 21 during milling by the milling cutter 210, resulting in the widening of the alloy strip 20. The shaping operation of the alloy strip 20 is essentially eliminating dimensional errors. The two follower wheels 340 cooperate with the grinding wheel 330 to jointly press the portion of the alloy strip 20 that enters the shaping area 1. This process applies extrusion force to the outer wall of the alloy strip 20 and the groove 21, and the magnitude of the extrusion force is directly proportional to the amount of dimensional deformation of the alloy strip 20. That is, the greater the dimensional deformation entering the shaping area 1, the greater the extrusion force required to flatten it. The structure formed by the cooperation of the follower wheels 340 and the grinding wheel 330... The leveling capacity has an upper limit. When the size of the part to be leveled is too large, the part will get stuck in the forming area 1 because it cannot be leveled. At this time, the machine needs to be stopped and the follower wheel 340 and the grinding wheel 330 need to be removed before the stuck part on the alloy strip 20 can be moved out, which makes maintenance difficult. If the operator does not stop the machine in time when the jamming problem occurs, the output shaft 311 of the motor 310 will bear the torque generated when the material is jammed, which can easily cause the motor 310 to malfunction. This not only increases the maintenance cost, but also causes the pre-processing process of the alloy strip 20 to be stopped for a long time.

[0038] Please see Figure 3 and Figure 4 To solve the above problems, the coupling 400 includes a connecting disc 410, a limiting ring 420, and several resistance rollers 430.

[0039] Please see Figure 3 and Figure 4A connecting plate 410 is located at the end of the output shaft 311, and a grinding wheel 330 is rotatably mounted on the connecting plate 410, allowing the grinding wheel 330 to rotate relative to the connecting plate 410. A polygonal boss 411 is provided on the connecting plate 410 within the grinding wheel 330. There is a gap between the polygonal boss 411 and the inner cavity of the grinding wheel 330. It should be noted that in this embodiment, the cross-section of the polygonal boss 411 is hexagonal, while the inner cavity of the grinding wheel 330 is circular. Therefore, the width of the gap formed by the outer wall of the polygonal boss 411 and the inner cavity of the grinding wheel 330 has the following characteristics: the size of the gap decreases from the middle of the side to both sides, i.e., it is wider in the middle and narrower at the sides. Figure 4 As shown.

[0040] The limiting ring 420 is rotatably disposed within the gap between the polygonal boss 411 and the grinding wheel 330, and the limiting ring 420 is in a state of free rotation within the gap. The limiting ring 420 has multiple through grooves 421, and the resistance roller 430 is located in the through groove 421, and the outer wall of the resistance roller 430 is tangent to one side of the polygonal boss 411; each side of the polygonal boss 411 is in contact with a resistance roller 430.

[0041] When the polygonal boss 411 rotates, it presses against the resistance roller 430 so that the resistance roller 430 abuts against the inner cavity of the grinding wheel 330.

[0042] The coupling 400 links the grinding wheel 330 with the output shaft 311, and releases the linkage in case of material jamming, as follows:

[0043] When the motor 310 starts, the connecting plate 410 rotates with the output shaft 311, while the grinding wheel 330 and the limiting ring 420 are stationary at this moment due to inertia. The resistance roller 430 inside the limiting ring 420 is also stationary at the moment the motor 310 starts. The deflection of the polygonal boss 411 causes its side to push against the resistance roller 430, making the resistance roller 430 away from the center of the polygonal boss 411 and in contact with the inner wall of the grinding wheel 330. The polygonal boss 411 makes contact with the grinding wheel 330 through the resistance roller 430, thereby driving the grinding wheel 330 to rotate synchronously to grind the groove 21.

[0044] It should be noted that during the grinding process, the motor 310 always rotates in the same direction, and the resistance roller 430 is clamped between the grinding wheel 330 and the polygonal boss 411, so that the grinding wheel 330 and the output shaft 311 rotate synchronously.

[0045] The output shaft 311 and the grinding wheel 330 are linked by the resistance roller 430. When material jamming occurs during the grinding process, simply press the emergency stop button. After the motor 310 stops running, drag the alloy strip 20 in the opposite direction to release the resistance roller 430 from the grinding wheel 330, so that the grinding wheel 330 can be manually rotated. Maintenance personnel can pull the jammed part out of the forming area 1 without disassembling the grinding wheel 330. Since there is no need to disassemble or reassemble parts, the time for releasing the jamming is greatly reduced, which helps to reduce the difficulty of maintenance and improve the pre-processing efficiency of the alloy strip 20.

[0046] It is known that in the initial state, the output shaft 311 and the grinding wheel 330 are not locked together, and the grinding wheel 330 is in a freely rotatable state. Only when the motor 310 is started and there is alloy strip 20 in the shaping area 1 will the resistance roller 430 contact the inner wall of the grinding wheel 330, thus linking the grinding wheel 330 with the output shaft 311. At the same time, the component that keeps the output shaft 311 and the grinding wheel 330 rotating is the resistance roller 430. The resistance roller 430 will bear the extrusion force from the inner wall of the grinding wheel 330 and the side of the polygonal boss 411. When jamming occurs, the extrusion force on the resistance roller 430 will increase sharply, squeezing and deforming the resistance roller 430. The resistance roller 430 can no longer hold against the inner wall of the grinding wheel 330, and the linkage between the grinding wheel 330 and the output shaft 311 will be automatically released. The resistance roller 430 is made of a material with a lower hardness than the grinding wheel 330 and the edge boss 411. The resistance roller 430 is made as a wear part to replace the grinding wheel 330 and the output shaft 311 in case of damage, thus providing protection for the main shaping components. On the other hand, since the resistance roller 430 cannot effectively hold the grinding wheel 330 after deformation, the locking of the grinding wheel 330 is automatically released. This allows the output shaft 311 to be in an idling state when the operator does not shut down the equipment in time, avoiding the torque generated by the jamming material from continuously acting on the motor 310 and preventing the motor 310 from being overloaded and burned out.

[0047] In summary, the integrated device 10 for milling and straightening resistance strips has the following beneficial effects:

[0048] 1. The grooving and shaping of the alloy strip 20 are carried out on the same equipment, which improves the pretreatment efficiency of the alloy strip 20.

[0049] 2. Utilizing the characteristic that the motor 310 always rotates in the same direction during the grinding process, the grinding wheel 330 is linked to the output shaft 311 through the resistance roller 430. When the motor 310 starts, the grinding wheel 330 and the output shaft 311 rotate synchronously. If material jamming occurs, the grinding wheel 330 can be disengaged from the output shaft 311 by reversing the motion, so that the grinding wheel 330 can be manually rotated. The process of resolving the material jamming problem does not require disassembly of parts, reducing maintenance difficulty.

[0050] 3. The linkage between the grinding wheel 330 and the output shaft 311 is achieved through the resistance roller 430. As a vulnerable component in the coupling 400, the resistance roller 430 can replace the grinding wheel 330 and the output shaft 311 in the event of material jamming and the operator not stopping the machine in time, thus protecting the main shaping components. On the other hand, since the resistance roller 430 cannot effectively support the grinding wheel 330 after deformation, the locking of the grinding wheel 330 is automatically released. This allows the output shaft 311 to be in an idling state when the operator does not shut down the equipment in time, preventing the torque generated by material jamming from continuously acting on the motor 310 and avoiding overload and burnout of the motor 310.

[0051] In one embodiment, the hardness of the resistance roller 430 is less than that of the grinding wheel 330 and the polygonal boss 411, ensuring that the resistance roller 430 deforms first in the event of a jamming problem, thereby protecting other components from damage and reducing equipment maintenance costs. Preferably, the resistance roller 430 includes a magnetic core and a soft outer skin, with the magnetic core embedded in the soft outer skin. The magnetic attraction generated between the magnetic core and the polygonal boss 411 attracts the resistance roller 430 to the outer wall of the polygonal boss 411. The part that deforms after a jamming occurs is the soft outer skin, and the magnetic core can be recycled, reducing maintenance costs.

[0052] In one embodiment, the width of the through groove 421 is greater than the outer diameter of the resistance roller 430, so that there is a gap between the resistance roller 430 and the through groove 421, so as to avoid the through groove 421 from hindering the movement of the resistance roller 430, and ensure that the rotation of the output shaft 311 can push the resistance roller 430 to move outward and abut against the inner wall of the grinding wheel 330 at the first time, thereby locking the grinding wheel 330.

[0053] In one embodiment, the resistance roller 430 is spherical or cylindrical in shape.

[0054] Please see Figure 2 In one embodiment, a pressure plate 220 is provided on the cutting table 200. The pressure plate 220 is used to cover the alloy strip 20. An avoidance opening 221 is provided on the pressure plate 220, and the milling cutter 210 passes through the avoidance opening 221.

[0055] Please see Figure 1 In one embodiment, an anti-bias block 500 is provided between the milling cutter 210 and the shaping component 300. The anti-bias block 500 covers the alloy strip 20 to prevent the alloy strip 20 from jumping during the feeding process and affecting the subsequent shaping process.

[0056] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A resistance strip milling and straightening integrated device for processing a groove on an alloy strip, characterized by, include: A traction turntable and a cutting table and a shaping assembly arranged sequentially along the feeding direction of the alloy strip; The cutting table is equipped with a milling cutter, which is used to cut grooves on the alloy strip. The shaping assembly includes a motor, a shaping base, a grinding wheel, and two follower wheels. The shaping base has a track, and the two follower wheels are located on both sides of the track. A shaping area is provided between the two follower wheels. The output shaft of the motor is connected to the grinding wheel, and the grinding wheel is located on the shaping area. The outer wall of the grinding wheel has a cutting edge that extends into the groove. A coupling is provided between the grinding wheel and the output shaft; The coupling includes a connecting disc, a limiting ring, and several resistance rollers. The connecting disc is located at the end of the output shaft. The grinding wheel is rotatably mounted on the connecting disc. A polygonal boss is provided on the connecting disc within the grinding wheel, with a gap between the polygonal boss and the inner cavity of the grinding wheel. The limiting ring is rotatably located within the gap between the polygonal boss and the grinding wheel, and has multiple through grooves. The resistance rollers are located within the through grooves, and the outer wall of the resistance roller is tangent to one side of the polygonal boss. When the polygonal boss rotates, it presses against the resistance roller, causing the resistance roller to abut against the inner cavity of the grinding wheel. The hardness of the resistance roller is less than that of the grinding wheel and the polygonal boss. The polygonal boss has a hexagonal cross-section, and the number of resistance rollers is the same as the number of sides of the polygonal boss. The width of the through groove is greater than the outer diameter of the resistance roller. Initially, the output shaft and the grinding wheel are not locked together, and the grinding wheel is in a freely rotatable state. Only when the motor is started and there is alloy material strip in the shaping area will the resistance roller contact the inner wall of the grinding wheel, linking the grinding wheel with the output shaft. At the same time, the component that keeps the output shaft and the grinding wheel rotating is the resistance roller. The resistance roller will bear the extrusion force from the inner wall of the grinding wheel and the side of the polygonal boss. When jamming occurs, the extrusion force on the resistance roller will increase sharply, squeezing and deforming the resistance roller. The resistance roller can no longer hold against the inner wall of the grinding wheel, and the linkage between the grinding wheel and the output shaft will be automatically released.

2. The integrated device of claim 1, wherein, The resistance roller is spherical in shape.

3. The integrated electric resistance strip milling and straightening apparatus of claim 1, wherein, The resistance roller is cylindrical in shape.

4. The integrated electric resistance strip milling and straightening apparatus of claim 1, wherein, The resistance roller includes a magnetic core and a soft outer sheath, with the magnetic core embedded within the soft outer sheath.

5. The integrated device for milling and straightening resistance strips according to claim 1, characterized in that, The cutting table is provided with a pressure plate, which is used to cover the alloy strip. The pressure plate has a clearance opening, through which the milling cutter passes.

6. The integrated device for milling and straightening resistor strips according to claim 1, characterized in that, An anti-bias block is provided between the milling cutter and the shaping component.

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