A copper strip fine cutting device for coaxial feeder production

Abstract

The present invention provides a copper strip fine cutting device for coaxial feeder production, which enables stable and reliable fine cutting in the width direction of the copper strip, and the device can quickly adapt to the fine cutting of copper strips with different widths, and has good versatility. It includes: a front base, which includes two upwardly convex first bearing positioning plates and a first positioning bottom plate; a front disc cutter assembly, which includes a front fine cutting cutter shaft, two side front disc cutters, a front spacer blade, two front fine cutting bushings, two first bearings, and two groups of first bearing fasteners; a rear base, which includes two upwardly convex second bearing positioning plates and a second positioning bottom plate; a rear disc cutter assembly, which includes a rear fine cutting cutter shaft, two side rear disc cutters, a rear spacer blade, two rear fine cutting bushings, two second bearings, and two groups of second bearing fasteners; a rotating positioning pin shaft; and at least one set of adjustable mechanisms, which are height direction adjustable mechanisms.

Description

Technical Field

[0001] The present invention relates to the technical field of coaxial feeder production, and specifically to a copper strip fine cutting device for coaxial feeder production. Background Art

[0002] With the continuous expansion of the subway and railway markets in China, 5G feeders are commonly used for radio frequency signal transmission and have a wider and wider application range. The existing feeder production technologies all use adjustable fine cutting devices for copper strip fine cutting. Due to the large number of parts in this fine cutting device, it is difficult to ensure the machining accuracy, and the adjustment process is too long. Often, due to poor adjustment, there are burrs on the cut edge, the cut edge is uneven, which easily leads to problems in subsequent welding and corrugation. Welding is prone to small holes and poor welding, with poor airtightness. Poor welding leads to corrugation cracking, and due to the periodic poor cut edge problem, cable standing wave problems occur. Therefore, the quality of the fine cutting device directly affects the quality of the cable. There is an urgent need to develop a fine cutting device that can ensure stable and reliable copper strip fine cutting. Summary of the Invention

[0003] In view of the above problems, the present invention provides a copper strip fine cutting device for coaxial feeder production, which enables stable and reliable fine cutting in the width direction of the copper strip, and the device can quickly adapt to the fine cutting of copper strips with different widths, and has good versatility.

[0004] A copper strip fine cutting device for coaxial feeder production, characterized in that it comprises:

[0005] A front base, which comprises two upwardly convex first bearing positioning plates and a first positioning bottom plate;

[0006] A front disc cutter assembly, which comprises a front fine cutting cutter shaft, two side front disc cutters, a front spacer blade, two front fine cutting shaft sleeves, two first bearings, and two sets of first bearing fasteners;

[0007] A rear base, which comprises two upwardly convex second bearing positioning plates and a second positioning bottom plate;

[0008] A rear disc cutter assembly, which comprises a rear fine cutting cutter shaft, two side rear disc cutters, a rear spacer blade, two rear fine cutting shaft sleeves, two second bearings, and two sets of second bearing fasteners;

[0009] A rotation positioning pin shaft;

[0010] And at least one set of adjustable mechanism, which is a height direction adjustable mechanism;

[0011] A transverse through-hole is provided at the rear end of the first positioning base plate. A pair of through-positioning holes are provided between the second bearing positioning plates arranged oppositely. The rotating positioning pin shaft is arranged through the transverse through-hole and the through-positioning hole on the corresponding side. At least one side of the front end of the first positioning base plate is provided with a first waist-shaped hole arranged in the front-back direction, and the first waist-shaped hole is arranged through the thickness direction of the first positioning base plate. A positioning connection hole is provided at the position directly below the first waist-shaped hole on the second positioning base plate. The bottom of the adjustable mechanism is fixedly connected to the positioning connection hole, and the movable end of the adjustable mechanism drives the second positioning base plate to move in the height direction;

[0012] The first bearings on both sides of the front disc cutter assembly are respectively positioned in the installation cavities of the first bearing positioning plates on the corresponding sides, and the second bearings on both sides of the rear disc cutter assembly are respectively positioned in the installation cavities of the second bearing positioning plates on the corresponding sides;

[0013] The copper strip to be precisely cut enters from below the disc cutter of the front disc cutter assembly into the gap between the two groups of disc cutter groups, and then flows out backward from above the disc cutter of the rear disc cutter assembly;

[0014] The width of the rear spacer blade of the rear disc cutter assembly is the precise cutting width of the copper strip.

[0015] Its further features are as follows:

[0016] When the front disc cutter assembly and the rear disc cutter assembly are assembled, the corresponding bearings are limited and assembled through the bearing gland covers and bearing end covers on both sides to ensure the stable and reliable positions of the first bearing and the second bearing;

[0017] Two axially penetrating concave key grooves are arranged at intervals on the inner ring wall of the front spacer blade. A round head cylindrical pin is fixedly installed on the outer ring of the axial center of the front precision cutting tool shaft. The concave key grooves of the front spacer blade are aligned with the round head cylindrical pin to complete radial positioning;

[0018] Fixing holes are provided on the two side walls of the front spacer blade. The front disc cutters on the corresponding sides are respectively fixedly installed on the corresponding side surfaces of the front spacer blade through fasteners and positioning holes. The front precision cutting shaft sleeves on the corresponding sides are respectively arranged closely against the outer surface of the front disc cutter on the corresponding side and the inner surface of the inner ring of the first bearing. When the width of the copper strip needs to be adjusted, only the front spacer blade and the front precision cutting shaft sleeve with the corresponding bearing width need to be replaced;

[0019] Two axially penetrating concave key grooves are arranged at intervals on the inner ring wall of the rear spacer blade. A round head cylindrical pin is fixedly installed on the outer ring of the axial center of the rear precision cutting tool shaft. The concave key grooves of the rear spacer blade are aligned with the round head cylindrical pin to complete radial positioning;

[0020] Fixing holes are provided on both side walls of the rear separating blade. The rear disc knives on the corresponding sides are respectively fixed on the corresponding side surfaces of the rear separating blade through fasteners and positioning holes. The rear precision cutting bushings on the corresponding sides are respectively arranged closely against the outer surface of the rear disc knife on the corresponding side and the inner surface of the inner ring of the second bearing. When the width of the copper strip needs to be adjusted, only the rear separating blade and the rear precision cutting bushing with the corresponding bearing width need to be replaced;

[0021] The adjustable mechanism is arranged on one side of the device, and a set of mounting holes is reserved on the symmetric other side of the device. The set of mounting holes includes a first waist-shaped hole and a positioning connection hole, which ensures that the edge cutting device is applicable to production lines in both left and right hand directions and is convenient for operation and installation;

[0022] The adjustable mechanism is specifically a screw-nut adjustment mechanism, which specifically includes a compression spring, a nut, a stud, and a spring seat. The bottom of the stud is fixed in the positioning connection hole. A compression spring and a spring seat are sleeved on the stud. The upper part of the compression spring abuts against the spring seat, and the upper part of the spring seat abuts against the lower surface of the first positioning bottom plate. The stud passes through the first waist-shaped hole and is threadedly connected to the nut. The lower surface of the nut is pressed against the upper surface of the first positioning bottom plate. By rotating the nut, the angle between the first positioning bottom plate and the second positioning bottom plate is adjusted, so as to adjust the precision cutting gap;

[0023] The transverse width of the first positioning bottom plate is equal to the distance between the second bearing positioning plates on both sides, thereby restricting the cutting edge of the precision cutting from shifting left and right;

[0024] The outer diameters of the front disc knife and the front separating blade are the same. The outer diameter of the rear disc knife is larger than that of the rear separating blade. The overall width formed by the combination of the front disc knife and the front separating blade is equal to the width of the rear separating blade. The copper strip surface closely adheres to the outer circles of the front disc knife and the front separating blade to reach the cutting point. The cutting point is the shearing position of the cutting edges of the front and rear disc knives. This shearing position is divided into two on the left and right, corresponding to both sides of the copper strip. The shearing positions are symmetrically distributed with respect to the center of the device, ensuring that both sides of the copper strip are precisely cut after passing through the two shearing positions on both sides. After precision cutting, the middle is the required copper strip with a fixed width, and both sides are the waste cut edges after precision cutting. The copper strip with a fixed width leaves the precision cutting device along the outer circular surface of the rear separating blade;

[0025] Preferably, the outer diameter of the rear disc knife is 2 mm larger than that of the rear separating blade;

[0026] The distance between the inner side surfaces of the two rear disc knives is the same as the distance between the outer side surfaces of the two front disc knives. The outer cutting edge of the front disc is in contact with the inner cutting edge of the rear disc knife. The front and rear cutting edges of the two knives on the corresponding sides cross by 0.2 - 0.5 mm. The front and rear disc knives are driven by the copper strip to realize rolling cutting of both sides of the copper strip.

[0027] After adopting the above technical solution, the copper strip surface closely adheres to the outer circles of the front disc cutter and the front spacer blade to reach the cutting point, which is the shearing position of the blades of the front and rear disc cutters. This shearing position is divided into two on the left and right, corresponding to both sides of the copper strip. The shearing positions are symmetrically distributed with respect to the center of the device, ensuring that both sides of the copper strip are precisely cut after passing through the shearing positions on both sides. After precise cutting, the middle is the required copper strip with a fixed width, and both sides are the waste cut edges after precise cutting. The copper strip with a fixed width leaves the precise cutting device along the outer circular surface of the rear spacer blade. The size of the front and rear cross positions of the two blades is realized by a height-adjustable mechanism. Since the rotating positioning pin shaft pivotally connects the front base and the rear base, the front base can swing around the center line of the rotating positioning pin shaft within the front area of the rear base. By adjusting the angle between the front and rear bases, the cross distance between the shears of the front and rear disc cutters can be adjusted, and then the adjustment of the cutting positions of the two groups of circular cutter disc assemblies can be realized. It can accurately control the cutting depth, and there will be no change in the width direction; when adjustment in the width direction is required, only the spacer blades and the precise cutting bushings with corresponding width dimensions of the two groups of circular cutter disc assemblies need to be replaced; it makes the precise cutting in the width direction of the copper strip stable and reliable, and the device can quickly adapt to the precise cutting of copper strips with different widths, and it has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic perspective view of the present invention Figure I ;

[0029] Figure 2 is a schematic perspective view of the present invention Figure II ;

[0030] Figure 3 is an exploded perspective view of the present invention;

[0031] Figure 4 is a top view of the present invention;

[0032] Figure 5 is Figure 4 a partially enlarged schematic view of part A of

[0033] Figure 6 is a schematic diagram of the copper strip running direction of the present invention;

[0034] Figure 7 is a cross-sectional view of the front disc cutter assembly of the present invention;

[0035] Figure 8 is a cross-sectional view of the rear cutter disc assembly of the present invention;

[0036] The names of the numbers corresponding in the figures are as follows:

[0037] Front base 1, first bearing positioning plate 11, first positioning bottom plate 12, first waist-shaped hole 121, front disc cutter assembly 2, front precision cutting tool shaft 21, first round head cylindrical pin 211, front disc cutter 22, front spacer blade 23, first concave keyway 231, front precision cutting bushing 24, first bearing 25, rear base 3, second bearing positioning plate 31, second positioning bottom plate 32, through positioning hole 321, positioning connection hole 322, second waist-shaped round hole 323, rotating positioning pin shaft 4, rear disc cutter assembly 5, rear precision cutting tool shaft 51, second round head cylindrical pin 511, rear disc cutter 52, rear spacer blade 53, second concave keyway 531, rear precision cutting bushing 54, second bearing 55, bearing gland 6, bearing end cover 7, screw-nut adjusting mechanism 8, compression spring 81, wing nut 82, stud 83, spring seat 84, bearing fastener 9, washer 91, lock washer 92, round nut 93. Detailed implementation mode

[0038] A copper strip precision cutting device for coaxial feeder production, see Figures 1-8 : It includes a front base 1, a front disc cutter assembly 2, a rear base 3, a rear disc cutter assembly 5, a rotating positioning pin shaft 4, and a set of adjustable mechanisms 8;

[0039] The front base 1 includes two upwardly convex first bearing positioning plates 11 and a first positioning bottom plate 12;

[0040] The front disc cutter assembly 2 includes a front precision cutting tool shaft 21, front disc cutters 22 on both sides, a front spacer blade 23, two front precision cutting bushings 24, two first bearings 25, and two sets of first bearing fasteners;

[0041] The rear base 3 includes two upwardly convex second bearing positioning plates 31 and a second positioning bottom plate 32;

[0042] The rear disc cutter assembly 5 includes a rear precision cutting tool shaft 51, rear disc cutters 52 on both sides, a rear spacer blade 53, two rear precision cutting bushings 54, two second bearings 55, and two sets of second bearing fasteners;

[0043] The adjustable mechanism is a height-direction adjustable mechanism;

[0044] A transverse through-hole is provided at the rear end of the first positioning base plate 12. A pair of through-positioning holes 321 are provided between the second bearing positioning plates 22 arranged oppositely. The rotating positioning pin shaft 4 is arranged through the transverse through-hole and the through-positioning hole 321 on the corresponding side. At least one first waist-shaped hole 121 arranged in the front-rear direction is provided on at least one side of the front end of the first positioning base plate 12. The first waist-shaped hole 121 penetrates through the thickness direction of the first positioning base plate 12. A positioning connection hole 322 is provided at the position directly below the first waist-shaped hole 121 on the second positioning base plate 22. The bottom of the adjustable mechanism is fixedly connected to the positioning connection hole 322. The movable end of the adjustable mechanism drives the second positioning base plate to rotate in the height direction along the rotating positioning pin shaft 4, and the length of the first waist-shaped hole 121 ensures rotation in the height direction within a reasonable range.

[0045] The first bearings 25 on both sides of the front disc cutter assembly 2 are respectively positioned in the installation cavities of the first bearing positioning plates 11 on the corresponding sides. The second bearings 55 on both sides of the rear disc cutter assembly 5 are respectively positioned in the installation cavities of the second bearing positioning plates 31 on the corresponding sides.

[0046] The copper strip to be precisely cut enters from below the disc cutter of the front disc cutter assembly into the gap between the two groups of disc cutter sets, and then flows out backward from above the disc cutter of the rear disc cutter assembly.

[0047] The width of the rear spacer blade 53 of the rear disc cutter assembly 5 is the precise cutting width of the copper strip.

[0048] During specific implementation: The first bearing fastener and the second bearing fastener are the same bearing fastener 9, which specifically includes a washer 91, a lock washer 92, and a round nut 93.

[0049] When assembling the front disc cutter assembly 2 and the rear disc cutter assembly 5, the corresponding bearings are limited and assembled through the bearing gland 6 and the bearing end cover 7 on both sides to ensure the stable and reliable positions of the first bearing 25 and the second bearing 55.

[0050] Two axially penetrating first concave key grooves 231 are arranged at intervals on the inner ring wall of the front spacer blade 23. A first round head cylindrical pin 211 is fixedly installed on the outer ring of the axial center of the front precision cutting tool shaft 21. The first concave key groove 231 of the front spacer blade 23 is aligned with the first round head cylindrical pin 211 to complete radial positioning.

[0051] A pair of fixing holes at different radial angles are provided on the two side walls of the front spacer blade 23. The corresponding front disc cutters 22 on the corresponding sides are respectively fixedly installed on the corresponding side surfaces of the front spacer blade 23 through fasteners and positioning holes. The corresponding front precision cutting bushings 24 on the corresponding sides are respectively arranged closely against the outer surface of the corresponding front disc cutter 22 and the inner surface of the inner ring of the first bearing 25. When the width of the copper strip needs to be adjusted, only the front spacer blade 23 and the front precision cutting bushing 24 with the corresponding bearing width need to be replaced.

[0052] On the inner ring wall of the rear spacer blade 53, two axially penetrating second concave key grooves 531 are arranged at intervals. Corresponding to the outer ring of the axial center of the rear finish cutting tool shaft 51, a second round head cylindrical pin 511 is fixedly installed. The second concave key groove 531 of the rear spacer blade 53 is aligned with the second round head cylindrical pin 511 to complete radial positioning.

[0053] On both side walls of the rear spacer blade 53, a pair of fixing holes at different radial angles are provided. The corresponding rear disc knives 52 on each side are fixedly installed on the corresponding side surfaces of the rear spacer blade 53 through fasteners and positioning holes. The corresponding rear finish cutting bushings 54 on each side are arranged closely against the outer surface of the corresponding rear disc knife 52 and the inner surface of the inner ring of the second bearing 55. When the width of the copper strip needs to be adjusted, only the rear spacer blade 53 and the rear finish cutting bushing 54 with the corresponding bearing width need to be replaced.

[0054] The adjustable mechanism is arranged on one side of the device, and a set of mounting holes is reserved on the symmetric other side of the device. The set of mounting holes includes a first waist-shaped hole 121 and a positioning connection hole 322, which ensures that the edge cutting device is applicable to production lines in both left and right hand directions, facilitating operation and installation.

[0055] The adjustable mechanism is specifically a screw-nut adjustment mechanism 8, which specifically includes a compression spring 81, a wing nut 82, a stud 83, and a spring seat 84. The bottom of the stud 83 is fixedly installed in the positioning connection hole 322. A compression spring 81 and a spring seat 84 are sleeved on the stud 83. The upper part of the compression spring 81 abuts against the spring seat 84, and the upper part of the spring seat 84 abuts against the lower surface of the first positioning base plate 12. The stud 83 passes through the first waist-shaped hole 121 and is threadedly connected to the wing nut 82. The lower surface of the wing nut 82 is pressed against the upper surface of the first positioning base plate 12. By rotating the wing nut 82, the angle between the first positioning base plate 11 and the second positioning base plate 31 is adjusted, thereby adjusting the finish cutting gap.

[0056] The transverse width of the first positioning base plate 11 is equal to the facing distance between the second bearing positioning plates 12 on both sides, thereby restricting the cutting edge of the finish cutting from shifting left and right.

[0057] The outer diameters of the front disc knife 22 and the front spacer blade 23 are the same. The outer diameter of the rear disc knife 52 is larger than the outer diameter of the rear spacer blade 53. The overall width formed by the combination of the front disc knife 22 and the front spacer blade 23 is equal to the width of the rear spacer blade 53. The copper strip surface abuts against the outer circles of the front disc knife 22 and the front spacer blade 23 to reach the cutting point. The cutting point is the shearing position of the cutting edges of the front and rear disc knives. This shearing position is divided into two on the left and right, corresponding to both sides of the copper strip. The cutting positions are symmetrically distributed with respect to the center of the device, ensuring that both sides of the copper strip are finish cut after passing through the two side cutting positions. After finish cutting, the middle is the required width-fixed copper strip, and both sides are the waste cut edges after finish cutting. The width-fixed copper strip leaves the finish cutting device along the outer circular surface of the rear spacer blade.

[0058] During specific implementation, the outer diameter of the rear disk cutter 52 is 2 mm larger than that of the rear spacer blade 53; the distance between the inner sides of the two rear disk cutters 52 is the same as the distance between the outer sides of the two front disk cutters 22. The outer cutting edge of the front disk cutter 22 contacts the inner cutting edge of the rear disk cutter 52, and the front and rear cutting edges of the corresponding sides cross by 0.2 - 0.5 mm. The front and rear disk cutters are driven by a copper strip to roll-cut both sides of the copper strip.

[0059] During specific implementation: The second positioning base plate 32 is installed on the coaxial feeder production line through 4 second slotted round holes 323. The second slotted round holes 323 can enable the entire edge cutting device to move left and right, ensuring that the precision-cut copper strip is located at the center position of the production line.

[0060] The operation process is as follows: a. First, assemble this device to ensure that the front and rear disk cutter assemblies rotate flexibly, the circumferential and radial runouts of the front and rear disk cutters are within the required tolerance range, the shear position gap between the front and rear disk cutters is minimized, and the edge cutting width is adjusted by replacing the spacer blade and the precision cutting bushing. A set of spacer blade and precision cutting bushing is configured for each specification of the feeder, and other parts are all common; b. Adjust the shear crossing position of the front and rear disk blades by adjusting the position of the screw nut to ensure that the crossing position is between 0.2 and 0.5 mm, with the standard that the copper strip edge can be cut off and the cut is smooth without burrs; c. Thread the copper strip through the lower part of the front disk blade and then upwards into the shear edge position of the front and rear blades, and pull out the copper strip after shearing both sides; d. The width-fixed copper strip in the middle enters the subsequent forming and welding tooling along the middle of the production line; e. The waste cut edges removed from both sides are collected through the guide wheels and the cut edge collection device on the production line.

[0061] The working principle is as follows:

[0062] The coaxial feeder copper strip enters from below the front disc cutter. The entering direction of the copper strip is tangent to the outer circle of the two front disc precision cutters in front. The two side lines of the copper strip enter the precision cutting device symmetrically with respect to the center line of the precision cutting device. The designed outer circle diameters of the front disc cutter and the front spacer blade are the same. Therefore, the copper strip surface closely adheres to the outer circles of the front disc cutter and the front spacer blade to reach the cutting point. The cutting point is the shearing position of the cutting edges of the front and rear disc cutters. This cutting position is divided into two, corresponding to the two sides of the copper strip. The cutting positions are symmetrically distributed with respect to the device center, ensuring that both sides of the copper strip are precisely cut after passing through the two cutting positions. After precise cutting, the middle is the required copper strip with a fixed width, and the two sides are the waste cut edges after precise cutting. The copper strip with a fixed width leaves the precision cutting device along the outer circle surface of the rear spacer blade. In specific implementation, the outer diameter of the rear disc blade is 2 mm larger than the outer diameter of the rear spacer blade. The distance between the inner side surfaces of the two rear disc blades is exactly the same as the distance between the outer side surfaces of the two front disc cutters. The outer cutting edge of the front disc is in contact with the inner cutting edge of the rear disc cutter. The front and rear cross positions of the two cutting edges are 0.2 - 0.5 mm. The rolling cutting of both sides of the copper strip is realized by driving the front and rear disc cutters through the copper strip. The adjustment mechanism for the size of the front and rear cross positions of the two cutting edges is realized. In specific implementation, the adjustment mechanism includes a stud, a compression spring, a spring seat, and a wing nut. The compression spring generates a separating force between the front base and the lower base. The nut presses the first positioning bottom plate and the second positioning bottom plate tightly. Since the rotating positioning pin shaft pivotally connects the front base and the rear base, the front base can swing around the center line of the rotating positioning pin shaft in the front area of the rear base. By adjusting the angle between the front and rear bases, the cross distance between the shearing of the front and rear disc cutters can be adjusted, and then the adjustment of the cutting position of the two sets of circular cutter disc assemblies can be realized. It can accurately control the cutting depth, and there will be no change in the width direction. Due to the lever distance, the number of turns of the rotating wing nut corresponds to the size of the position distance between the disc cutters. When adjustment in the width direction is required, just replace the spacer blades and precision cutting bushings with corresponding width dimensions for the two sets of circular cutter disc assemblies. It makes the precise cutting of the copper strip in the width direction stable and reliable, and the device can quickly adapt to the precise cutting of copper strips with different widths, and it has good versatility.

[0063] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non - restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0064] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A copper strip fine cutting device for coaxial feeder production, characterized in that, It includes: A front base, which includes two upwardly convex first bearing positioning plates and a first positioning bottom plate; A front disc cutter assembly, which includes a front precision cutting tool shaft, two front disc cutters on both sides, a front spacer blade, two front precision cutting bushings, two first bearings, and two sets of first bearing fasteners; A rear base, which includes two upwardly convex second bearing positioning plates and a second positioning bottom plate; A rear disc cutter assembly, which includes a rear precision cutting tool shaft, two rear disc cutters on both sides, a rear spacer blade, two rear precision cutting bushings, two second bearings, and two sets of second bearing fasteners; A rotating positioning pin shaft; And at least one set of adjustable mechanisms, which are height-direction adjustable mechanisms; A transverse through-hole is provided at the rear end of the first positioning bottom plate, and a pair of through positioning holes are provided between the second bearing positioning plates arranged opposite to each other. The rotating positioning pin shaft is arranged through the transverse through-hole and the corresponding through positioning hole on one side. At least one side of the front end of the first positioning bottom plate is provided with a first waist-shaped hole arranged in the front-rear direction, and the first waist-shaped hole penetrates through the thickness direction of the first positioning bottom plate. A positioning connection hole is provided at the position directly below the first waist-shaped hole on the second positioning bottom plate. The bottom of the adjustable mechanism is fixedly connected to the positioning connection hole, and the movable end of the adjustable mechanism drives the second positioning bottom plate to move in the height direction; The adjustable mechanism is specifically a screw-nut adjustment mechanism, which specifically includes a compression spring, a nut, a stud, and a spring seat. The bottom of the stud is fixedly installed in the positioning connection hole. A compression spring and a spring seat are sleeved on the stud. The upper part of the compression spring is mounted on the spring seat, and the upper part of the spring seat is mounted on the lower surface of the first positioning bottom plate. The stud passes through the first waist-shaped hole and is threadedly connected to the nut. The lower surface of the nut is pressed on the upper surface of the first positioning bottom plate. By rotating the nut, the angle between the first positioning bottom plate and the second positioning bottom plate can be adjusted; The first bearings on both sides of the front disc cutter assembly are respectively positioned in the installation cavities of the corresponding first bearing positioning plates on both sides, and the second bearings on both sides of the rear disc cutter assembly are respectively positioned in the installation cavities of the corresponding second bearing positioning plates on both sides; The copper strip to be precision cut enters from below the disc cutter of the front disc cutter assembly into the gap between the two sets of disc cutter groups, and then flows out from above the disc cutter of the rear disc cutter assembly and flows backward; The width of the rear spacer blade of the rear disc cutter assembly is the precision cutting width of the copper strip.

2. The copper strip fine cutting device for coaxial feeder production according to claim 1, characterized in that: When the front disc cutter assembly and the rear disc cutter assembly are assembled, the corresponding bearings are limited and assembled through the bearing gland covers and bearing end covers on both sides.

3. The copper strip precision cutting device for coaxial feeder production according to claim 1, characterized in that: Two axially penetrating concave key grooves are spacedly arranged on the inner ring wall of the front spacer blade. A round head cylindrical pin is fixedly installed on the outer ring of the axial center of the front precision cutting tool shaft. The concave key grooves of the front spacer blade are aligned with the round head cylindrical pin to complete radial positioning.

4. The copper strip fine cutting device for coaxial feeder production according to claim 3, characterized in that: Fixing holes are provided on both side walls of the front spacer blade. The front disc cutters on the corresponding sides are respectively fixedly installed on the corresponding sides of the front spacer blade through fasteners and positioning holes. The front precision cutting bushings on the corresponding sides are respectively closely arranged against the outer surface of the front disc cutter on the corresponding side and the inner surface of the inner ring of the first bearing. When the width of the copper strip needs to be adjusted, only the front spacer blade and the front precision cutting bushing with the corresponding bearing width need to be replaced.

5. The copper strip fine cutting device for coaxial feeder production according to claim 1, characterized in that: On the inner ring wall of the rear spacer blade, two axially penetrating concave key grooves are arranged at intervals. On the outer ring of the axial center of the rear finish cutting tool shaft, a round head cylindrical pin is fixedly installed correspondingly. The concave key grooves of the rear spacer blade are aligned with the round head cylindrical pin to complete radial positioning.

6. A copper strip fine cutting device for coaxial feeder production according to claim 5, characterized in that: On the two side walls of the rear spacer blade, fixing holes are provided. The rear disc cutters on the corresponding sides are respectively fixedly installed on the corresponding side surfaces of the rear spacer blade through fasteners and positioning holes. The rear finish cutting shaft sleeves on the corresponding sides are respectively arranged closely against the outer surface of the rear disc cutter on the corresponding side and the inner surface of the inner ring of the second bearing. When the width of the copper strip needs to be adjusted, only the rear spacer blade and the rear finish cutting shaft sleeve with the corresponding bearing width need to be replaced.

7. The copper strip fine cutting device for coaxial feeder production according to claim 1, wherein: The adjustable mechanism is arranged on one side of the device, and a set of installation holes is reserved on the symmetric other side of the device. The set of installation holes includes a first kidney-shaped hole and a positioning connection hole.

8. The copper strip fine cutting device for coaxial feeder production according to claim 1, wherein: The outer diameter of the rear disc cutter is 2 mm larger than the outer diameter of the rear spacer blade.

9. The copper strip precision cutting device for coaxial feeder production according to claim 8, wherein: The distance between the inner side surfaces of the two rear disc cutters is the same as the distance between the outer side surfaces of the two front disc cutters. The outer cutting edge of the front disc is in contact with the inner cutting edge of the rear disc cutter. The two cutting edges on the corresponding sides are crossed front and back by 0.2 - 0.5 mm. The front and rear disc cutters are driven by the copper strip to realize rolling cutting of both sides of the copper strip.

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