A lead strip unwinding system

Abstract

The present invention discloses a lead strip unwinding system, which system comprises a machine body; a support unwinding unit, the support unwinding unit comprising a swing arm assembly and an unwinding assembly; the swing arm assembly comprising a swing arm and a swing arm driving mechanism, the swing arm driving mechanism being connected to the machine body; the swing arm comprising a U-shaped main body, two side walls of the U-shaped main body being provided with coaxial first through holes and second through holes; the swing arm driving mechanism comprising a motor and a worm and worm gear reducer; this system can prevent the lead coil in a free state from reversing, enable the lead coil to rotate only in one direction along the lead strip feeding direction, reduce the fluctuation of the feeding resistance, reduce the deformation of the lead strip, and achieve the effect of stabilizing the lead strip feeding. The structure is small and simple, occupies little space, and has good effects. Without using a conventional complex unwinding mechanism, the manufacturing cost is low, and during normal production, the energy consumption of this mechanism is small. Its operation and maintenance are simple, and the use cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of the production of bullet head parts - lead sleeves, and particularly to a lead strip unwinding system that can reduce the quality fluctuation of lead strip feeding and improve the utilization rate of lead strips. Background Art

[0002] Lead sleeves are used for assembling bullet heads. The lead sleeve preparation process is one of the important links in the bullet head manufacturing process. In the traditional lead sleeve preparation process for bullet head parts at present, there is a problem of large quality fluctuation in the lead strip feeding mechanism (length fluctuation and diameter fluctuation). A large quality fluctuation in feeding requires increasing the length of each lead strip feeding, resulting in a reduction in the utilization rate of lead strips. There are mainly the following two reasons.

[0003] a. The lead coil (when full) weighs about 100 kg, the tooling is rough (low cost), the eccentricity is large, and it is worn on the lead shaft during operation. During the lead strip unwinding process, it is easy to swing back and forth, increasing the resistance fluctuation of lead strip feeding. Especially when the lead coil rotates in reverse due to eccentricity, just when the lead strip is in the feeding process, its feeding resistance increases several times. The lead strip is soft and easy to deform, resulting in being stretched and the diameter becoming smaller, causing the quality fluctuation of lead strip feeding.

[0004] b. After the feeding of the lead strip ends in each punching cycle (the lead sleeve preparation machine tool belongs to a horizontal punching press), the lead strip is in a free state and is easily taken back by the feeding mechanism of the lead sleeve preparation machine tool during reset or the lead strip retreats due to its own weight, etc., resulting in a decrease in the feeding length of the lead strip and causing the quality fluctuation of lead strip feeding.

[0005] Therefore, how to provide a simple lead strip unwinding mechanism to reduce the quality fluctuation of lead strip feeding and improve the utilization rate of lead strips is an urgent technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the above problems, the present invention provides a lead strip unwinding system for overcoming the above problems or at least partially solving the above problems. It solves the disadvantages of large quality fluctuation in lead strip feeding and low utilization rate of lead strips (length fluctuation and diameter fluctuation) in the traditional lead sleeve preparation process. This system is used for the lead strip feeding link in the lead sleeve preparation machine tool. During the lead strip unwinding process, it can prevent the lead coil from rotating in reverse, and at the same time guide, straighten and prevent the lead strip from retreating.

[0007] The present invention provides the following solutions:

[0008] A lead strip unwinding system, comprising:

[0009] A body;

[0010] A support unwinding unit, the support unwinding unit comprising a swing arm assembly and an unwinding assembly;

[0011] The swing arm assembly includes a swing arm and a swing arm drive mechanism, and the swing arm drive mechanism is connected to the machine body; the swing arm includes a U-shaped main body, and two side walls of the U-shaped main body are provided with coaxial first through holes and second through holes; the swing arm drive mechanism includes a motor and a worm and worm gear reducer; one side of the lower end of the U-shaped main body is connected to a pedestal bearing on the machine body in a mating manner, and the other side of the lower end of the U-shaped main body is connected to the motor and the worm and worm gear reducer in a mating manner, and the worm and worm gear reducer has a self-locking function;

[0012] The unwinding assembly includes a lead roll shaft, a fixed sleeve, a first one-way bearing, a stop turntable and a fork; the fixed sleeve is coaxially and fixedly connected to the inside of the second through hole, the first one-way bearing is sleeved outside the fixed sleeve, and the stop turntable is sleeved outside the first one-way bearing; the stop turntable is provided with a mounting hole penetrating through its two side surfaces;

[0013] Wherein, the swing arm drive mechanism is used to drive the swing arm and carry the unwinding assembly to swing within the working angle range, so that the unwinding assembly is switched between the roll change position and the unwinding position; between the two side arms of the U-shaped main body is used to place a lead roll tooling, so that the lead roll shaft sequentially passes through the first through hole, the lead roll tooling and the first one-way bearing, and the lead roll tooling is erected on the U-shaped main body; one end of the fork is inserted into the mounting hole and is connected to the stop turntable through a positioning screw, and the other end of the fork forks into a spoke of the lead roll tooling, and the lead roll tooling is used to carry a lead bar and rotates and unwinds along the rotatable direction of the first one-way bearing under the traction force of a lead sleeve preparation machine tool connected to the lead bar.

[0014] Preferably: the fixed sleeve and the U-shaped main body are connected by a stop plate; the stop plate is used for axial positioning and stopping rotation of the fixed sleeve.

[0015] Preferably: it further includes a guiding, straightening and anti-retreat unit, and the guiding, straightening and anti-retreat unit is arranged on the traveling path of the lead bar from the support unwinding unit to the lead sleeve preparation machine tool; the guiding, straightening and anti-retreat unit is used to guide, straighten and stop rotation of the lead bar unwound from the lead roll tooling.

[0016] Preferably: the guiding, straightening and anti-retreat unit includes a guiding component, and the guiding component includes a mounting plate and at least 3 pairs of guiding wheels; the mounting plate is connected to the machine body, and at least 3 pairs of the guiding wheels are arranged coaxially and are all connected to the mounting plate; the outer circle of the guiding wheel is provided with a first arc groove structure; each pair of the guiding wheels is distributed up and down, so that the lead bar is limited between the first arc groove structures of the two guiding wheels included in each pair.

[0017] Preferably, a guide wheel shaft is provided on the mounting plate, and the guide wheel is connected to the guide wheel shaft through a bearing.

[0018] Preferably, the guiding, straightening and anti-reverse unit further includes a guiding anti-reverse assembly, the guiding anti-reverse assembly includes two anti-reverse wheels, and an anti-reverse wheel shaft is provided on the mounting plate; the anti-reverse wheel is connected to the anti-reverse wheel shaft through a second one-way bearing; a second arc groove structure is provided on the outer circle of the anti-reverse wheel; the two anti-reverse wheels are distributed in pairs up and down, so that the lead strip is limited between the second arc groove structures of the two anti-reverse wheels respectively.

[0019] Preferably, a plurality of shallow grooves are provided on the surface of the second arc groove structure.

[0020] Preferably, the mounting plate is provided with a first sliding groove, an adjusting block is connected to the upper part of the first sliding groove, and a slider in a free state is provided in the first sliding groove; the anti-reverse wheel located above is connected to the anti-reverse wheel shaft on the slider; by adjusting the position of the slider in the height direction, the distance between the two anti-reverse wheels arranged in pairs up and down can be adjusted.

[0021] Preferably, an adjusting screw is further included, and the adjusting screw is in threaded connection with the threaded hole of the adjusting block; the lower end of the adjusting screw is hinged to the slider, and a locking nut is provided on the adjusting screw, and the locking nut is located above the adjusting block.

[0022] Preferably, the slider is provided with a second sliding groove, and the lower end of the adjusting screw extends into the second sliding groove; a shaft retaining ring is provided at the lower end of the adjusting screw, and a retaining edge is provided on the second sliding groove; the lower end of the adjusting screw is limited in the second sliding groove by the shaft retaining ring and the retaining edge, and a gap is formed between the lower end surface of the adjusting screw and the bottom surface of the second sliding groove; a spring is sleeved outside the adjusting screw, and the spring is located between the slider and the adjusting block.

[0023] According to the specific embodiments provided by the present invention, the following technical effects of the present invention are disclosed:

[0024] A lead strip unwinding system provided by an embodiment of the present application can prevent the lead coil in a free state from reversing, enable the lead coil to rotate only in one direction along the lead strip feeding direction, reduce the fluctuation of the feeding resistance, reduce the deformation of the lead strip, and achieve the effect of stabilizing the lead strip feeding. The structure is small and simple, occupies little space, and has good effects. It does not use a conventional complex unwinding mechanism, has a low manufacturing cost, and has low energy consumption during normal production (only when replacing the lead coil, the motor drives the swing arm), and its operation and maintenance are simple, and the use cost is low.

[0025] In addition, in a preferred embodiment, a plurality of pairs of guide wheels are provided to guide and straighten the lead bar. The outer circle of the guide wheel is an arc groove structure, and the lead bar passes through the arc groove structures of the plurality of pairs of guide wheels to achieve the guiding and straightening of the lead bar. A pair of anti-reverse wheels are used to guide and prevent the reverse movement of the lead bar. A one-way bearing is installed in each anti-reverse wheel, so that the anti-reverse wheel can only rotate along the feeding direction of the lead bar. At the same time, the outer circle of the anti-reverse wheel is an arc groove structure, and the lead bar passes through the arc grooves of the two anti-reverse wheels. A plurality of shallow grooves are evenly distributed in the arc grooves to increase the friction with the lead bar. The spring pressure makes the anti-reverse wheels approach each other and press the lead bar tightly to achieve the guiding and anti-reverse of the lead bar.

[0026] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. Brief Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 is a schematic structural diagram of a lead bar unwinding system provided by an embodiment of the present invention;

[0029] Figure 2 is a partial schematic diagram in the X direction provided by an embodiment of the present invention;

[0030] Figure 3 is a sectional view taken along the A-A plane provided by an embodiment of the present invention;

[0031] Figure 4 is an enlarged schematic view of the K part provided by an embodiment of the present invention;

[0032] Figure 5 is a sectional view taken along the B-B plane provided by an embodiment of the present invention;

[0033] Figure 6 is an enlarged schematic view of the L part provided by an embodiment of the present invention;

[0034] Figure 7 is a sectional view taken along the N-N plane provided by an embodiment of the present invention;

[0035] Figure 8 is a sectional view taken along the C-C plane provided by an embodiment of the present invention;

[0036] Figure 9 is a sectional view taken along the D-D plane provided by an embodiment of the present invention;

[0037] Figure 10It is a schematic structural diagram of the anti-return wheel provided by an embodiment of the present invention;

[0038] Figure 11 It is a schematic structural diagram of the lead coil tooling provided by an embodiment of the present invention;

[0039] Figure 12 It is the front view of the lead coil tooling provided by an embodiment of the present invention.

[0040] In the figure: 100. Support and unwind unit, 200. Guide, straighten and anti-return unit, 300. Lead sleeve preparation machine tool, 1. Machine body, 2. Motor and worm and worm gear reducer, 3. Pillow block bearing, 4. Swing arm, 5. Lead reel shaft, 6. Lead coil tooling, 61. Spoke, 7. Lead coil, 8. First one-way bearing, 9. Fixed sleeve, 10. Anti-rotation plate, 11. Retaining ring, 12. Hole retaining ring, 13. Anti-return plate, 14. Positioning screw, 15. Fork, 16. Mounting plate, 17. Guide wheel, 18. First bushing, 19. Bearing, 20. Guide wheel shaft, 21. First nut, 22. Anti-return wheel, 23. Bearing end cover, 24. Second one-way bearing, 25. Anti-return wheel shaft, 26. Second bushing, 27. Second nut, 28. Slide block, 29. Adjusting screw, 30. Locking nut, 31. Adjusting block, 32. Spring, 33. Shaft spring retaining ring, 34. First key, 35. Second key, 36. Third key, 37. Fourth key, 38. Fifth key, P. Lead bar. Detailed implementation manners

[0041] 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. Based on the embodiments in 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.

[0042] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 , a lead bar unwinding system provided by an embodiment of the present invention, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、Figure 10 , Figure 11 , Figure 12 As shown in Figure 12 , the system may include:

[0043] A body 1; a fixed part of the equipment that does not move, and all other components are installed thereon.

[0044] A supporting unwind unit 100, the supporting unwind unit 100 includes a swing arm assembly and an unwind assembly;

[0045] The swing arm assembly includes a swing arm 4 and a swing arm driving mechanism, and the swing arm assembly and the swing arm driving mechanism are connected to the body 1; the swing arm 4 includes a U-shaped main body, and two side walls of the U-shaped main body are provided with coaxial first through holes and second through holes; the swing arm driving mechanism is a motor and a worm and worm gear reducer 2 that are connected in cooperation therewith; one side of the lower end of the U-shaped main body is connected to the pedestal bearing 3 on the body 1, and the other side of the lower end of the U-shaped main body is connected in cooperation with the motor and the worm and worm gear reducer 2;

[0046] The unwind assembly includes a lead reel 5, a fixed sleeve 9, a first one-way bearing 8, a stop turntable 13, and a fork 15; the fixed sleeve 9 is coaxially fixedly connected to the inside of the second through hole, the first one-way bearing 8 is sleeved outside the fixed sleeve 9, and the stop turntable 13 is sleeved outside the first one-way bearing 8; the stop turntable 13 is provided with mounting holes penetrating through both its two side surfaces;

[0047] Wherein, the swing arm driving mechanism is used to drive the swing arm 4 and the unwind assembly carried by it to swing within the working requirement and safe angle range, so that the unwind assembly can be switched between the lead roll replacement position and the unwind working position; between the two side arms of the U-shaped main body is used to place a lead roll tooling 6, so that the lead reel 5 sequentially passes through the first through hole, the lead roll tooling 6, and the first one-way bearing 8, and the lead roll tooling 6 is erected on the U-shaped main body; one end of the fork 15 is inserted into the mounting hole and connected to the stop turntable 13 through a positioning screw 14, and the other end of the fork 15 is inserted into a spoke 61 of the lead roll tooling 6, and the lead roll tooling 6 is used to carry a lead bar and rotate and unwind along the rotatable direction of the first one-way bearing 8 under the traction force of a lead sleeve manufacturing machine tool 300 connected to the lead bar P.

[0048] In the lead strip unwinding system provided by the embodiment of the present application, the lead reel 5 is installed on the swing arm 4, the lead coil 7 is wound on the lead reel 5, and the motor and the worm and worm gear reducer 2 drive the swing arm 4 to swing within the working requirement and safe angle range, so as to realize the lifting of the lead coil 7, facilitate the replacement of the lead coil 7, and can also be provided with a travel switch or a sensor according to needs to limit the swing angle of the swing arm 4. The swing arm 4 can only swing within the safe angle range required for work. The worm and worm gear reducer has a self-locking function, and the swing arm 4 can stop at any position within the safe range, and will not cause accidental swinging or slipping of the swing arm 4 due to sudden power failure or other reasons, resulting in danger. The stop turntable 13 is fixed to the outer ring of the first one-way bearing 8 and can only rotate in one direction. The fork 15 is fixed to the stop turntable 13, and the fork 15 is inserted into one of the spokes of the lead coil tooling 6 to prevent the lead coil 7 from swinging along the axis of the lead reel 5.

[0049] The system provided by the embodiment of the present application can prevent the lead coil 7 in a free state from reversing, reduce the fluctuation of the feeding resistance, reduce the deformation of the lead strip, and achieve the effect of stable lead strip feeding. This system does not use a conventional complex servo unwinding mechanism. The lead coil 7 is wound on the lead reel 5, and the feeding mechanism of the lead sleeve preparation machine tool 300 (feeding once per stroke) intermittently pulls the lead strip to realize lead strip feeding. However, since the lead coil 7 weighs 100 kg (when full), the tooling is rough (low manufacturing cost), the eccentricity is large, the lead coil 7 is prone to swing back and forth along the axis of the lead reel 5, and the fluctuation of the lead strip feeding resistance is large. Especially when the lead strip is fed, if the lead coil 7 just swings in the reverse direction, the rotation direction of the lead coil 7 is opposite to the traction direction of the lead strip feeding, and the feeding resistance will increase several times. And the lead strip is soft and easy to deform, that is, the diameter will be pulled smaller (the length of the lead strip conveyed per stroke is the same, and the mass of the lead strip of the same length will become smaller), which will affect the stability of the lead strip feeding quality. This system can make the lead coil 7 rotate only in one direction along the lead strip feeding direction, the lead coil 7 will not swing in the reverse direction, reduce the lead strip feeding resistance, and achieve the effect of stable lead strip feeding.

[0050] In order to further prevent the fixing sleeve 9 from moving relative to the stop plate, the embodiment of the present application can provide that the fixing sleeve 9 is connected to the U-shaped body through the stop plate; the stop plate is used for axial positioning and rotation stopping of the fixing sleeve 9.

[0051] The uses of the components included in the supporting unwinding unit provided by the embodiments of the present application are as follows: Motor and worm and worm gear reducer 2: used to drive the swing arm 4 to swing, realize the lifting of the lead coil 7, and facilitate the replacement of the lead coil 7. The worm and worm gear reducer has a self-locking function, which can keep the lead coil 7 at any angle. Swing arm 4: used to install components such as the lead coil 7 and the lead coil shaft 5, and can be driven by the motor and the worm and worm gear reducer 2 to swing axially to realize the lifting of the lead coil 7 and facilitate the replacement of the lead coil 7. Lead coil shaft 5: the lead coil 7 is threaded thereon and used to support the lead coil 7. Lead coil tooling 6: used to wind the lead strip to form the lead coil 7. Lead coil 7: the raw material for lead sleeve production, and the lead strip is wound on the lead coil tooling 6 to form the lead coil 7. First one-way bearing 8: used to prevent the lead coil 7 from swinging along the axis of the lead coil shaft 5. Fixed sleeve 9: used to support the lead coil shaft 5 and install components such as the first one-way bearing 8, the anti-rotation plate 13, and the fork 15 to prevent the lead coil 7 from swinging. Anti-rotation plate 10: used for axial positioning and anti-rotation of the fixed sleeve 9. Retaining ring 11: used to separate the swing arm 4 from the first one-way bearing 8. Two hole-type retaining rings 12: used for axial positioning of the first one-way bearing 8 and the anti-rotation plate 13. Anti-rotation plate 13: fixed to the outer ring of the one-way bearing and can only rotate in one direction, used to install the fork 15. Positioning screw 14: used for positioning the fork 15 and can quickly disassemble and assemble the fork 15. Fork 15: fixed to the anti-rotation plate 13. During operation, the fork 15 forks into one of the spokes of the lead coil tooling 6 and is used to prevent the lead coil 7 from swinging along the axis of the lead coil shaft 5. First key 34: used for radial anti-rotation of the inner ring of the first one-way bearing 8 and the fixed sleeve 9. Second key 35: used for radial anti-rotation of the outer ring of the one-way bearing 1 and the anti-rotation plate 13.

[0052] After the soft lead strip is unwound from the lead coil 7, its shape is irregularly bent and its straightness is poor. At the same time, after the feeding of the lead strip ends in each punching cycle (the lead sleeve preparation machine tool 300 is a horizontal punching machine), the lead strip is in a free state and is easily carried back by the feeding mechanism of the lead sleeve preparation machine tool 300 when it is reset, or the lead strip retreats due to its own weight, etc., resulting in a shorter feeding length of the lead strip, thereby affecting the stability of the lead strip feeding quality. To solve the above problems, the unwound lead strip can be guided, straightened, and stopped from retreating, so as to achieve the effect of stable feeding of the lead strip. The embodiments of the present application can provide a guiding, straightening, and anti-retreat unit 200, and the guiding, straightening, and anti-retreat unit 200 is arranged on the traveling path of the lead strip from the supporting unwinding unit to the lead sleeve preparation machine tool 300; the guiding, straightening, and anti-retreat unit 200 is used to guide, straighten, and stop the retreat of the lead strip unwound from the lead coil tooling 6.

[0053] Further, the guiding, straightening and anti-retreat unit 200 includes a guiding assembly. The guiding assembly includes a mounting plate 16 and at least three pairs of guiding wheels 17, shown as four pairs in the figure. The mounting plate 16 is connected to the machine body 1. At least three pairs of the guiding wheels 17 are arranged coaxially and are all hinged to the mounting plate 16. A first arc groove structure is provided on the outer circle of the guiding wheel 17. At least three pairs of the guiding wheels 17 are distributed in pairs up and down, so that the lead bar P is limited between the first arc groove structures of multiple pairs of the guiding wheels 17. Specifically, a guiding wheel shaft 20 is provided on the mounting plate 16, and the guiding wheel 17 is connected to the guiding wheel shaft 20 through a bearing.

[0054] In order to further achieve the guiding, straightening and anti-retreat effects of the lead bar, the embodiment of the present application can also provide that the guiding, straightening and anti-retreat unit 200 further includes a guiding and anti-retreat assembly. The guiding and anti-retreat assembly includes two anti-retreat wheels 22. A anti-retreat wheel shaft 25 is provided on the mounting plate 16. The anti-retreat wheel 22 is connected to the anti-retreat wheel shaft 25 through a second one-way bearing 24. A second arc groove structure is provided on the outer circle of the anti-retreat wheel 22. The two anti-retreat wheels 22 are distributed in pairs up and down, so that the lead bar is limited between the second arc groove structures of the two anti-retreat wheels 22.

[0055] In order to increase the friction between the anti-retreat wheel 22 and the lead bar, the embodiment of the present application can also provide that multiple shallow grooves are provided on the surface of the second arc groove structure.

[0056] Since it is convenient for the lead bar to enter and exit between the two anti-retreat wheels 22 during actual use, the embodiment of the present application can also provide that the mounting plate 16 is provided with a first sliding groove. The upper part of the first sliding groove is connected with an adjusting block 31. A slider 28 in a free state is provided in the first sliding groove. The anti-retreat wheel 22 located above is connected to the anti-retreat wheel shaft 25 on the slider 28. Adjust the position of the slider 28 in the height direction to realize the adjustment of the distance between the two anti-retreat wheels 22 arranged in pairs up and down.

[0057] Specifically, in order to further optimize the adjustment method, the embodiment of the present application can also provide that an adjusting screw 29 is further included. The adjusting screw 29 is cooperatively connected to the threaded hole of the adjusting block 31. The lower end of the adjusting screw 29 is hinged to the slider 28. A locking nut 30 is provided on the adjusting screw 29, and the locking nut 30 is located above the adjusting block 31.

[0058] The slider 28 is provided with a second chute, and the lower end of the adjusting screw 29 extends into the second chute; a shaft retaining ring 33 is arranged at the lower end of the adjusting screw 29, and the second chute is provided with a retaining edge; the lower end of the adjusting screw 29 is limited by the shaft retaining ring 33 and the retaining edge, and a gap is formed between the lower end surface of the adjusting screw 29 and the bottom surface of the second chute within the second chute; a spring 32 is sleeved outside the adjusting screw 29, and the spring 32 is located between the slider 28 and the adjusting block 31.

[0059] In the guiding, straightening and anti-retreat unit 200 provided by the embodiment of the present application, multiple pairs of guiding wheels 17 (3 pairs and more than 3 pairs, Figure 1 as shown as 4 pairs) are used to guide and straighten the lead bar. A bearing is installed inside the guiding wheel 17, and the outer circle of the guiding wheel 17 is an arc groove structure. The lead bar passes through the arc grooves of multiple pairs of guiding wheels 17 to realize the guiding and straightening of the lead bar. A pair of anti-retreat wheels 22 are used to guide and prevent the retreat of the lead bar. A one-way bearing is installed inside each anti-retreat wheel 22, and the outer circle of the anti-retreat wheel 22 is an arc groove structure. The lead bar passes through the arc grooves of the two anti-retreat wheels 22, and multiple shallow grooves are evenly distributed in the arc grooves to increase the friction with the lead bar. Under the pressure of the spring 32, the anti-retreat wheels 22 approach each other and press the lead bar tightly to realize the guiding and anti-retreat of the lead bar. Components such as the adjusting screw 29, the slider 28, and the spring 32 are used to adjust the pressure of the anti-retreat wheels 22 on the lead bar during work, and are used to withdraw and load the pressure of the anti-retreat wheels 22 on the lead bar when replacing the lead coil 7.

[0060] The uses of the various components included in the guiding, straightening and anti-retreat unit 200 provided by the embodiment of the present application are as follows:

[0061] The mounting plate 16: used to mount the guiding wheels 17, the anti-retreat wheels 22 and related components. The guiding wheel 17: the outer circle of the guiding wheel 17 is an arc groove structure, and a bearing is installed inside the guiding wheel 17, which is used for guiding and straightening the lead bar and is used in pairs (3 pairs and more than 3 pairs, Figure 1As shown in (4 pairs). The first bushing 18: used to separate the two bearings of each guide wheel 17. The bearing: used for the installation of the guide wheel 17, reducing friction, and the guide wheel 17 can rotate axially along the guide wheel shaft 20. The guide wheel shaft 20: used for the installation of the guide wheel 17 and related components. The first nut 21: used to fasten the guide wheel shaft 20 and the bearing 19. The anti-backlash wheel 22: The anti-backlash wheel 22 is fixed on the outer ring of the second one-way bearing 24 and can only rotate in the lead bar feeding direction. The outer circle of the anti-backlash wheel 22 is in the shape of an arc groove, and multiple shallow grooves are evenly distributed in the arc groove, which can increase the friction between the anti-backlash wheel 22 and the lead bar, and is used for the guiding and anti-backlash of the lead bar P. The bearing end cover 23: used for the axial positioning of the second one-way bearing 24. The second one-way bearing 24: One second one-way bearing 24 is installed for each anti-backlash wheel 22, so that the anti-backlash wheel 22 can only rotate in the lead bar feeding direction. The anti-backlash wheel shaft 25: used for the installation of the anti-backlash wheel 22 and related components. The second bushing 26: used to separate the second one-way bearing 24 from the mounting plate 16. The second nut 27: used to fasten the anti-backlash wheel shaft 25. The slider 28: used for the lifting (compressed by the spring 32, floating) of the upper anti-backlash wheel 22. The adjusting screw 29: During operation, it is used to compress the spring 32 of the upper anti-backlash wheel 22. When replacing the lead coil 7, it releases and restores the pressure of the spring 32, and drives the slider 28 to lift, facilitating the lead bar P to pass through the arc groove of the 2 anti-backlash wheels 22. The locking nut 30: used to lock the adjusting screw 29 to prevent it from loosening. The adjusting block 31: used for the installation connection of the adjusting screw 29. The spring 32: used to compress the slider 28. The shaft circlip 33: used for the axial positioning of the slider 28 at one end of the adjusting screw 29. The third key 36: used for the radial anti-rotation between the anti-backlash wheel shaft 25 and the mounting plate 16. The fourth key 37: used for the radial anti-rotation between the inner ring of the second one-way bearing 24 and the anti-backlash wheel shaft 25. The fifth key 38: used for the radial anti-rotation between the outer ring of the second one-way bearing 24 and the anti-backlash wheel 22.

[0062] The system provided by the embodiment of the present application can be used in the lead bar feeding link of the lead sleeve preparation machine tool 300. The lead sleeve preparation machine tool 300 is a horizontal punching machine, and the lead bar feeding is realized by the internal feeding mechanism of the lead sleeve preparation machine tool 300 to traction the lead bar, and a certain length of lead bar is tractioned in each punching cycle.

[0063] The working process of the system provided by the embodiment of the present application is as follows:

[0064] When the lead coil 7 is used up and needs to be replaced to continue production, manually start the motor to drive the swing arm 4 to rotate a certain angle and stop. The lead coil tooling 6 automatically descends to the loading position. Manually withdraw the fork 15 (used to stop the rotation of the lead coil 7), pull out the lead coil shaft 5, thread the lead coil 7 to be replaced onto the lead coil shaft 5, reinstall the fork 15, and then manually start the motor to swing in the reverse direction by a certain angle and stop. The lead coil 7 automatically rises to the working position. Manually loosen the locking nut 30, rotate the adjusting screw 29 to make it rise, relieve the pressure of the spring 32, and drive the slider 28 to rise. Manually withdraw the remaining lead strip. For the replaced lead coil 7, manually withdraw a section to make it pass through multiple pairs of guide wheels 17 and a pair of anti-reverse wheels 22, and connect the head of the lead strip P to the corresponding feeding mechanism of the lead sleeve manufacturing machine tool 300. Finally, rotate the adjusting screw 29 to descend to the working position and lock the locking nut 30 to complete the replacement of the lead coil 7.

[0065] During operation, under the traction of the lead sleeve manufacturing machine tool 300, a certain length of the lead strip P is fed in each working cycle (one stroke of the lead sleeve manufacturing machine tool 300), causing the lead strip P to unwind gradually. At the same time, under the action of components such as the first one-way bearing 8 and the fork 15, the lead coil 7 can only rotate on the lead coil shaft 5 along the feeding direction of the lead strip P without forming a swing, achieving the effect of stable feeding of the lead strip P. (Due to the gap, there will be a slight swing, but its impact can be ignored). In addition, the lead strip P is soft and is bent after unwinding from the lead coil 7. After passing through multiple pairs of guide wheels 17 and a pair of anti-reverse wheels 22, the guiding, straightening, and anti-reverse of the lead strip P are completed, also achieving the effect of stable feeding of the lead strip.

[0066] In short, the lead strip unwinding system provided by this application can prevent the lead coil 7 in a free state from reversing, enable the lead coil 7 to rotate only in one direction along the feeding direction of the lead strip P, reduce the fluctuation of the feeding resistance, reduce the deformation of the lead strip P, and achieve the effect of stable feeding of the lead strip P. It has a small and simple structure, occupies little space, and has good effects. It does not use a conventional complex unwinding mechanism, has a low manufacturing cost, and has low energy consumption during normal production (only when replacing the lead coil, the motor will be run to drive the swing arm). Its operation and maintenance are simple, and the use cost is low.

[0067] In addition, the system realizes the guiding and straightening of the lead strip P through the provided multiple pairs of guide wheels. The outer circle of the guide wheel is an arc groove structure, and the lead strip P passes through the arc groove of the guide wheel to achieve the guiding and straightening of the lead strip. A pair of anti-reverse wheels realizes the guiding and anti-reverse functions of the lead strip P. A one-way bearing is installed in each anti-reverse wheel, and the outer circle of the anti-reverse wheel is an arc groove structure. The lead strip P passes through the arc grooves of the two anti-reverse wheels, and multiple shallow grooves are evenly distributed in the arc grooves to increase the friction with the lead strip P. The pressure of the spring 32 makes the anti-reverse wheels approach each other and press the lead strip P tightly to achieve the guiding and anti-reverse of the lead strip P.

[0068] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0069] From the description of the above embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of this application, in essence or the part that contributes to the prior art, can be embodied in the form of a software product, which can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0070] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for a system or a system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The systems and system embodiments described above are only illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative work.

[0071] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A lead strip unwinding system, characterized in that, it includes: a body; a support unwinding unit, the support unwinding unit includes a swing arm assembly and an unwinding assembly; the swing arm assembly includes a swing arm and a swing arm driving mechanism, the swing arm driving mechanism is connected to the body; the swing arm includes a U-shaped main body, and two side walls of the U-shaped main body are provided with coaxial first through holes and second through holes; the swing arm driving mechanism includes a motor and a worm and worm gear reducer; one side of the lower end of the U-shaped main body is connected to the pedestal bearing on the body in a mating manner, and the other side of the lower end of the U-shaped main body is connected to the motor and the worm and worm gear reducer in a mating manner, and the worm and worm gear reducer has a self-locking function; the unwinding assembly includes a lead roll shaft, a fixed sleeve, a first one-way bearing, a stop turntable and a fork; the fixed sleeve is coaxially and fixedly connected to the inside of the second through hole, the first one-way bearing is sleeved outside the fixed sleeve, and the stop turntable is sleeved outside the first one-way bearing; the stop turntable is provided with mounting holes penetrating through its two side surfaces; wherein, the swing arm driving mechanism is used to drive the swing arm and carry the unwinding assembly to swing within the working angle range, so that the unwinding assembly is switched between the roll-changing position and the unwinding position; between the two side arms of the U-shaped main body is used to place the lead roll tooling, so that the lead roll shaft sequentially passes through the first through hole, the lead roll tooling and the first one-way bearing, and the lead roll tooling is erected on the U-shaped main body; one end of the fork is inserted into the mounting hole and is connected to the stop turntable through a positioning screw, and the other end of the fork is inserted into a spoke of the lead roll tooling, and the lead roll tooling is used to carry the lead strip and rotate and unwind along the rotatable direction of the first one-way bearing under the traction of the lead sleeve preparation machine tool connected to the lead strip.

2. The lead strip unwinding system according to claim 1, characterized in that, the fixed sleeve is connected to the U-shaped main body through a stop plate; the stop plate is used for axial positioning and anti-rotation of the fixed sleeve.

3. The lead strip unwinding system according to claim 1, characterized in that, it further includes a guiding, straightening and anti-retreat unit, and the guiding, straightening and anti-retreat unit is arranged on the traveling path of the lead strip from the support unwinding unit to the lead sleeve preparation machine tool; the guiding, straightening and anti-retreat unit is used for guiding, straightening and anti-rotating the lead strip unwound from the lead roll tooling.

4. The lead strip unwinding system according to claim 3, characterized in that, the guiding, straightening and anti-retreat unit includes a guiding component, and the guiding component includes a mounting plate and at least 3 pairs of guiding wheels; the mounting plate is connected to the body, and at least 3 pairs of the guiding wheels are arranged coaxially and are all connected to the mounting plate; the outer circle of the guiding wheel is provided with a first arc groove structure; each pair of the guiding wheels is distributed up and down, so that the lead strip is limited between the first arc groove structures of the two guiding wheels included in each pair.

5. The lead strip unwinding system according to claim 4, characterized in that, A guide wheel shaft is provided on the mounting plate, and the guide wheel is connected to the guide wheel shaft through a bearing.

6. The lead bar unwinding system according to claim 4, characterized in that the guiding, straightening and anti-retreat unit further includes a guiding anti-retreat assembly, the guiding anti-retreat assembly includes two anti-retreat wheels, and an anti-retreat wheel shaft is provided on the mounting plate; the anti-retreat wheel is connected to the anti-retreat wheel shaft through a second one-way bearing; a second arc groove structure is provided on the outer circumference of the anti-retreat wheel; the two anti-retreat wheels are distributed in pairs up and down so that the lead bar is limited between the second arc groove structures of the two anti-retreat wheels.

7. The lead bar unwinding system according to claim 6, characterized in that a plurality of shallow grooves are provided on the surface of the second arc groove structure.

8. The lead bar unwinding system according to claim 7, characterized in that the mounting plate is provided with a first sliding groove, an adjusting block is connected to the upper part of the first sliding groove, and a slider in a free state is arranged in the first sliding groove; the anti-retreat wheel located above is connected to the anti-retreat wheel shaft on the slider; by adjusting the position of the slider in the height direction, the distance between the two anti-retreat wheels arranged in pairs up and down can be adjusted.

9. The lead bar unwinding system according to claim 8, characterized in that it further includes an adjusting screw, and the adjusting screw is cooperatively connected to the threaded hole of the adjusting block; the lower end of the adjusting screw is hinged to the slider, and a locking nut is arranged on the adjusting screw, and the locking nut is located above the adjusting block.

10. The lead bar unwinding system according to claim 9, characterized in that the slider is provided with a second sliding groove, and the lower end of the adjusting screw extends into the second sliding groove; an axial spring retaining ring is arranged at the lower end of the adjusting screw, and a retaining edge is arranged on the second sliding groove; the lower end of the adjusting screw is limited in the second sliding groove by the axial spring retaining ring and the retaining edge, and a gap is formed between the lower end surface of the adjusting screw and the bottom surface of the second sliding groove; a spring is sleeved outside the adjusting screw, and the spring is located between the slider and the adjusting block.

Images