A cross double knife seat with striping

Abstract

The utility model discloses a kind of striping cross double tool seats, including front tool holder assembly and the rear tool holder assembly of being set in the rear side of front tool holder assembly, the front tool holder assembly and rear tool holder assembly left and right ends are fixedly connected between all through mid partition fixed block, the front tool holder assembly and rear tool holder assembly left and right ends bottom are all connected with installation bottom plate, by additionally adding auxiliary feeding and protection device on the mid partition fixed block of front tool holder assembly and rear tool holder assembly, by long strip thickened metal frame A and long strip thickened metal frame B cooperation, with the help of height adjusting nut adjustment pitch, make auxiliary feeding cylinder A and auxiliary feeding cylinder B accurate clamping material upper and lower end, offset the bending, deviation caused by uneven tension, thickness deviation or vibration in conveying, ensure that material straight and stable contact cutter, avoid striping deviation, burr and other defects, improve precision and quality, cylinder rotates synchronously with material, reduce surface wear, provide stable guiding force, avoid material and material stagnation.

Description

Technical Field

[0001] This utility model belongs to the technical field of slitting machines, specifically relating to a slitting cross double knife holder. Background Technology

[0002] In industries such as metal processing and packaging materials, slitting machines are key equipment for cutting wide rolls of material into narrower widths. The performance of their core component—the double-blade holder—directly determines slitting efficiency, processing accuracy, and operational safety. As downstream industries increasingly demand higher standards for material slitting quality (such as cut smoothness and width tolerance) and production continuity;

[0003] Traditional double-blade slitting systems rely heavily on the material's own tension or simple guide rollers for feeding, lacking active material clamping and attitude control. When processing thin materials (such as aluminum foil or steel strip with a thickness ≤0.3mm), wrinkles and bends easily occur due to insufficient material rigidity. When processing thick plates or rigid metal strips, material deviation may occur due to uneven edges of the roll and vibrations during conveying. These problems cause unstable posture of the material when in contact with the slitting head, resulting in defects such as slitting width deviation (usually exceeding ±0.5mm), burrs on the cut, and curled edges, failing to meet the high-precision requirements of narrow strip materials in fields such as automotive manufacturing and precision electronics. Utility Model Content

[0004] The purpose of this utility model is to provide a slitting cross double cutter holder to solve the problems mentioned in the background art. Traditional double cutter holders rely on material tension or simple guide rollers for feeding, lack active clamping and posture control, and are prone to wrinkling and bending due to insufficient rigidity when processing thin materials, and are prone to unstable contact posture between the material and the cutter head due to uneven edges and vibration when processing thick plates or rigid strips.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a slitting cross double-blade holder, comprising a front blade holder assembly and a rear blade holder assembly disposed behind the front blade holder assembly. The left and right ends of the front and rear blade holder assemblies are fixedly connected by a central fixing block. Mounting base plates are connected to the bottom of both the left and right ends of the front and rear blade holder assemblies, and these mounting base plates can be bolted to the corresponding positions on the slitting machine. The front and rear blade holder assemblies have the same shape, size, and structural composition. The front blade holder assembly includes a right blade holder base, an auxiliary slitting roller, an active slitting roller, a metal retaining ring, a circular slitting cutter disc, and a left blade holder base. A left blade holder is disposed on the symmetrical left side of the right blade holder base. A knife holder base is provided, with an auxiliary slitting roller positioned between the lower center of the right and left knife holder bases. A drive slitting roller is positioned parallel above the auxiliary slitting roller. Multiple metal retaining rings are equidistantly fitted around the drive slitting roller. A circular slitting disc is fixed to the left end of each metal retaining ring via an open ring. The metal retaining rings are open, and their openings are connected by embedded screws. After the metal retaining rings are fitted onto the drive slitting roller, tightening the embedded screws closes the openings of the metal retaining rings, thus securing them to the outside of the drive slitting roller. An auxiliary feeding and protection device is provided between the two intermediate fixing blocks.

[0006] Preferably, the auxiliary feeding and protection device includes a long strip-shaped thickened metal frame A, a long strip-shaped thickened metal frame B, a height adjustment chute, a U-shaped groove A, an auxiliary feeding roller A, a protective partition, a U-shaped groove B, and an auxiliary feeding roller B. The interiors of both of the two intermediate partition fixing blocks are vertically equipped with height adjustment chutes. The bottom ends of the two height adjustment chutes are internally connected to the long strip-shaped thickened metal frame A, and the bottom and front and rear ends of the long strip-shaped thickened metal frame A are fixedly connected to the bottom and inner walls of the height adjustment chute by welding. A long strip-shaped thickened metal frame B is positioned parallel above the long strip-shaped thickened metal frame A. The left and right ends of the long strip-shaped thickened metal frame A and the long strip-shaped thickened metal frame B are respectively exposed in the two intermediate partitions. On the outside of the fixed block, the upper half of the center of the long strip thickened metal frame A is provided with a downwardly recessed U-shaped groove A, and the lower half of the center of the long strip thickened metal frame B is provided with an upwardly recessed U-shaped groove B. An auxiliary feeding roller A is provided inside the U-shaped groove A, and an auxiliary feeding roller B is provided inside the U-shaped groove B. Both the auxiliary feeding roller A and the auxiliary feeding roller B are located in the area between the two intermediate fixed blocks. A protective partition is welded to the top of the long strip thickened metal frame B. The protective partition extends vertically upward from the top of the long strip thickened metal frame B. The protective partition is located between the two intermediate fixed blocks and is also located between the rear tool holder assembly and the front tool holder assembly.

[0007] Preferably, shaft holes are provided inside the upper left and right ends of the center of the U-shaped groove A and the lower left and right ends of the center of the U-shaped groove B. Thickened metal shafts are provided at the center of the left and right ends of both the auxiliary feeding roller A and the U-shaped groove B. The thickened metal shafts at the left and right ends of the auxiliary feeding roller A are respectively inserted into the shaft holes inside the left and right ends of the U-shaped groove A, and the thickened metal shafts at the left and right ends of the auxiliary feeding roller B are respectively inserted into the shaft holes inside the left and right ends of the U-shaped groove B. The top end of the auxiliary feeding roller A protrudes above the top outer wall of the long, thickened metal frame A, while the bottom end of the auxiliary feeding roller B protrudes below the bottom outer wall of the long, thickened metal frame B. The top outer wall of the auxiliary feeding roller A and the top outer wall of the auxiliary slitting roller are on the same horizontal plane.

[0008] Preferably, the auxiliary feeding and protection device further includes a height adjustment nut A, an adjustment connecting screw, a height adjustment nut B, and a height adjustment lifting hole. Adjustment connecting screws are vertically welded to the outer wall of the top of the elongated thickened metal frame A near both the left and right ends. Height adjustment lifting holes are provided inside the elongated thickened metal frame B near both the left and right ends. Two adjustment connecting screws pass through the height adjustment lifting holes corresponding to their respective positions. A height adjustment nut A is threaded onto the lower outer side of the center of each of the two adjustment connecting screws, and the height adjustment nut A is located at the bottom of the elongated thickened metal frame B. A height adjustment nut B is threaded onto the upper outer side of the center of each of the two adjustment connecting screws, and the height adjustment nut B is located at the top of the elongated thickened metal frame B.

[0009] Preferably, the elongated thickened metal frame B can move up and down in the height adjustment grooves inside the two intermediate fixed blocks respectively. The elongated thickened metal frame B can move up and down outside the adjusting connecting screw through the height adjustment lifting hole. After the height adjustment nut A and the height adjustment nut B are tightened at the bottom and top of the elongated thickened metal frame B respectively, the height of the elongated thickened metal frame B can be locked.

[0010] Preferably, the auxiliary feeding and protection device further includes lifting guide holes and lifting guide rods. Lifting guide holes are provided on both the left and right sides of the two height adjustment lifting holes, and lifting guide rods are provided on both the left and right sides of the two adjusting connecting screws. Multiple lifting guide rods are vertically fixed by welding to the top outer wall of the long strip thickened metal frame A, and the top of each of the multiple lifting guide rods passes through the lifting guide hole corresponding to its position. The lifting guide holes move up and down outside the lifting guide rods, and the length of the lifting guide rods is equal to the length of the adjusting connecting screws.

[0011] Preferably, bearings are fixed inside the lower center of both the right and left knife holder bases. Roller shafts are provided at both ends of the auxiliary slitting roller, and the roller shafts at both ends of the auxiliary slitting roller are respectively inserted into the bearings inside the lower center of the right and left knife holder bases. Lifting adjustment grooves are provided inside the upper center of both the right and left knife holder bases. The top of both the right and left knife holder bases are fixed with base sealing plates by screws, and the two base sealing plates respectively seal the openings at the top of the two lifting adjustment grooves.

[0012] Preferably, a right lifting bearing seat and a left lifting bearing seat are respectively provided in the lifting adjustment groove inside the right knife holder base and the lifting adjustment groove inside the left knife holder base. Both the right and left lifting bearing seats can slide up and down inside the lifting adjustment groove. An adjustment screw hole is provided inside the center of the top plate of the two bases. An adjustment stud is threaded into the inside of the two adjustment screw holes. An adjustment handwheel is provided at the top of the two adjustment studs. The adjustment handwheel can drive the adjustment stud to rotate clockwise and counterclockwise. Roller shafts are provided at the center of the left and right ends of the active slitting roller. The roller shafts at both ends of the active slitting roller are respectively inserted into the bearings inside the right and left lifting bearing seats.

[0013] Preferably, a rotating connecting block is provided at the center of the top of both the right and left lifting bearing seats. An anti-disengagement hole is provided inside the center of both rotating connecting blocks, and an anti-disengagement block is provided inside the anti-disengagement hole. The cross-sectional shape of the anti-disengagement hole and the anti-disengagement block is T-shaped, and the opening diameter at the top of the anti-disengagement hole is smaller than the diameter at the bottom. The bottom of the height adjustment stud is fixedly connected to the top of the anti-disengagement block by welding.

[0014] Preferably, the height adjustment stud can move up and down inside the adjusting screw hole by rotating clockwise and counterclockwise through the action of the thread. When the height adjustment stud rotates clockwise and counterclockwise, it can drive the anti-disengagement block in the anti-disengagement hole to rotate synchronously. The anti-disengagement block can only rotate clockwise and counterclockwise in the anti-disengagement hole and cannot move up and down. When the height adjustment stud moves up and down, it will drive the right lifting bearing seat and the left lifting bearing seat to move up and down inside the lifting adjustment groove through the connecting action of the rotating connecting block.

[0015] Compared with the prior art, this utility model provides a slit cross double-blade holder, which has the following beneficial effects:

[0016] This invention adds a novel auxiliary feeding and protection device to the intermediate fixing block between the left and right ends of the front and rear cutter holder assemblies. This device, through the cooperation of elongated thickened metal frame A and elongated thickened metal frame B, allows the distance between them to be adjusted using adjusting nuts A and B. This ensures that the auxiliary feeding rollers A and B precisely clamp the material at its upper and lower ends. This clamping structure effectively counteracts bending and offset problems caused by uneven tension, thickness deviation, or equipment vibration during material conveying, ensuring that the material always maintains a straight and stable posture and a circular shape. The blade disc contacts the material, ensuring that it remains in a fixed position during cutting, whether it is as thin as aluminum foil or as thick as steel strip. This avoids defects such as slitting width deviation and edge burrs caused by material movement, significantly improving the dimensional accuracy and cut quality of the slitting process. In addition, the auxiliary feeding rollers A and B of this device rotate synchronously with the material during the material conveying process. Their rolling friction characteristics can reduce wear on the material surface and provide a stable guiding force for the material, avoiding material jamming and stagnation. Especially for continuous slitting operations of long roll materials, it can effectively maintain the uniformity of the feeding speed.

[0017] The protective partition at the top of the long, thickened metal frame B of the device is vertically installed between the front and rear cutter head assemblies, forming a solid physical barrier. When operators adjust the position of the circular slitting cutter head of one of the cutter heads, replace the spacer, or perform maintenance, the partition can effectively prevent limbs or tools from accidentally entering the operating cutter head area, avoiding contact with the high-speed rotating cutter head and reducing the risk of mechanical injury from the source. The entire device adopts a thickened metal frame, which is installed on the middle partition fixing block by a combination of welding and bolt locking. It has high structural strength and vibration resistance. Even under long-term high-load operation or material impact, it can maintain a stable installation position and working condition, avoiding safety hazards caused by loosening or falling off. Attached Figure Description

[0018] Figure 1 This is a front-view three-dimensional structural diagram of a slit cross double-blade holder according to the present invention.

[0019] Figure 2 This is a top view schematic diagram of the overall planar structure of a slit cross double-blade holder according to the present invention.

[0020] Figure 3 This is a front-view three-dimensional structural diagram of the tool holder assembly of this utility model.

[0021] Figure 4 This is a front view schematic diagram of the tool holder assembly of this utility model.

[0022] Figure 5 This is a three-dimensional structural diagram of the auxiliary feeding and protection device of this utility model.

[0023] Figure 6 This is a disassembly diagram of the auxiliary feeding and protection device of this utility model.

[0024] In the diagram: 1. Rear cutter holder assembly; 2. Front cutter holder assembly; 3. Mounting base plate; 4. Auxiliary feeding and protection device; 5. Center partition fixing block; 6. Right cutter holder base; 7. Lifting adjustment groove; 8. Auxiliary slitting roller; 9. Active slitting roller; 10. Metal retaining ring; 11. Circular slitting cutter disc; 12. Left cutter holder base; 13. Adjusting screw hole; 14. Adjusting handwheel; 15. Base sealing top plate; 16. Left lifting bearing seat; 17. Rotating connecting block; 18. Height adjustment stud; 19. Right lifting bearing seat; 20. Long strip thickened metal frame A; 21. Long strip thickened metal frame B; 22. Height adjustment slide; 23. U-shaped groove A; 24. Auxiliary feeding roller A; 25. Protective partition; 26. U-shaped groove B; 27. Auxiliary feeding roller B; 28. Height adjustment nut A; 29. ​​Adjusting connecting screw; 30. Height adjustment nut B; 31. Lifting guide hole; 32. Height adjustment lifting hole; 33. Lifting guide rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides, for example Figure 1-6The slitting cross-shaped double-blade holder shown includes a front blade holder assembly 2 and a rear blade holder assembly 1 disposed behind the front blade holder assembly 2. The left and right ends of the front blade holder assembly 2 and the rear blade holder assembly 1 are fixedly connected by a central fixing block 5. Mounting base plates 3 are connected to the bottom of both the left and right ends of the front blade holder assembly 2 and the rear blade holder assembly 1, and the mounting base plates 3 can be fixed to the corresponding positions on the slitting machine with bolts. The front blade holder assembly 2 and the rear blade holder assembly 1 are identical in shape, size, and structural composition, and adopt a completely symmetrical structural design. Using a power system and positioning reference (rigidly connected via a central fixing block 5 and mounting base plate 3), the two sets of tool holders can independently complete tool arrangement and slitting operations during operation. When one set of tool holders (such as the front tool holder) is in production, the other set (the rear tool holder) can simultaneously perform preparatory work such as tool spacing adjustment and spacer arrangement. Through a cross-shaped moving track (lateral and longitudinal moving mechanism), the two sets of tool holders can quickly interchange positions, achieving seamless connection between "production and preparation," significantly reducing tool change downtime and improving equipment utilization. The front tool holder assembly 2 includes a right tool holder. The system comprises a base 6, an auxiliary slitting roller 8, a drive slitting roller 9, metal retaining rings 10, a circular slitting cutter head 11, and a left cutter head base 12. A left cutter head base 12 is symmetrically positioned to the left of the right cutter head base 6. An auxiliary slitting roller 8 is positioned between the lower center of the right cutter head base 6 and the left cutter head base 12. A drive slitting roller 9 is positioned parallel above the auxiliary slitting roller 8. Multiple metal retaining rings 10 are equidistantly sleeved on the outside of the drive slitting roller 9. The left ends of each metal retaining ring 10 are fixed to the circular slitting cutter head 11 via open rings. The metal retaining rings 10 are open... The opening of the metal retaining ring 10 is connected by an embedded screw. After the metal retaining ring 10 is fitted onto the outside of the active slitting roller 9, the opening of the metal retaining ring 10 can be tightened by tightening the embedded screw, so that the metal retaining ring 10 is tightened and fixed to the outside of the active slitting roller 9. The circular slitting cutter disc 11 is fixed to the active slitting roller 9 by the metal retaining ring 10. The tightening force of the embedded screw at the opening of the retaining ring ensures that there is no relative sliding between the cutter disc and the roller shaft. By changing the arrangement of the spacers between the cutter discs, the slitting width can be precisely set.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, bearings are fixed inside the lower center of both the right knife holder base 6 and the left knife holder base 12. Roller shafts are provided at both ends of the auxiliary slitting roller 8, and these roller shafts are respectively inserted into the bearings inside the lower center of the right knife holder base 6 and the left knife holder base 12. Lifting adjustment grooves 7 are provided inside the upper center of both the right knife holder base 6 and the left knife holder base 12. Base sealing top plates 15 are fixed to the top of both the right knife holder base 6 and the left knife holder base 12 by screws, and the two base sealing top plates 15 respectively seal the two lifting adjustment grooves. The opening at the top of the groove 7, the lifting adjustment groove 7 inside the right tool holder base 6, and the lifting adjustment groove 7 inside the left tool holder base 12 are respectively provided with a right lifting bearing seat 19 and a left lifting bearing seat 16. Both the right lifting bearing seat 19 and the left lifting bearing seat 16 can slide up and down inside the lifting adjustment groove 7. The center of the top plate 15 of the two bases is provided with an adjusting screw hole 13. The interior of the two adjusting screw holes 13 is threaded with a height adjustment stud 18. The top of the two height adjustment studs 18 is provided with an adjusting handwheel 14. The height adjustment screw 18 can be driven to rotate clockwise and counterclockwise. Roller shafts are located at the center of both ends of the active slitting roller 9, and these shafts are respectively inserted into bearings inside the right lifting bearing seat 19 and the left lifting bearing seat 16. The height of the active slitting roller 9 is adjusted through the cooperation of the right lifting bearing seat 19, the left lifting bearing seat 16, and the lifting adjustment groove 7. The operator rotates the adjustment handwheel 14 to rotate the height adjustment screw 18, causing the active slitting roller 9 to move vertically, thereby precisely controlling the distance between it and the auxiliary slitting roller 8. The gap ensures that the cutting depth of the blade on the material is consistent, avoiding overcutting or incomplete cutting. The front blade holder assembly 2 and the rear blade holder assembly 1 form a frame structure through the middle partition fixing block 5. The bottom mounting base 3 is rigidly connected to the slitting machine body by bolts, which can offset the radial force and vibration generated during the slitting process. The blade holder base (right blade holder base 6 and left blade holder base 12) is made of thick-walled cast steel. With the precise matching of bearings and rollers, the parallelism error between the active slitting roller 9 and the auxiliary slitting roller 8 is smaller, providing a stable structural foundation for high-speed slitting.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a rotating connecting block 17 is provided at the center of the top of both the right lifting bearing seat 19 and the left lifting bearing seat 16. An anti-disengagement hole is provided inside the center of each rotating connecting block 17, and an anti-disengagement block is provided inside the anti-disengagement hole. Both the anti-disengagement hole and the anti-disengagement block have a T-shaped cross-section, and the top opening diameter of the anti-disengagement hole is smaller than the bottom diameter. The bottom end of the height adjustment stud 18 is fixedly connected to the top end of the anti-disengagement block by welding. The height adjustment stud 18 can move up and down inside the adjusting screw hole 13 by rotating clockwise and counterclockwise, and this rotation can also drive the anti-disengagement block in the anti-disengagement hole to rotate synchronously. The anti-disengagement block can only rotate clockwise and counterclockwise within the anti-disengagement hole and cannot move up and down. When the height adjustment stud 18 moves up and down, it will drive the right lifting bearing seat 19 and the left lifting bearing seat 16 to move up and down inside the lifting adjustment groove 7 through the connecting action of the rotating connecting block 17. Both the anti-disengagement block and the anti-disengagement hole are T-shaped. The cross-sectional design (the diameter of the top opening of the anti-detachment rotation hole is smaller than the diameter of the bottom opening, and the shape of the anti-detachment rotation block matches it) allows the anti-detachment rotation block to rotate freely within the anti-detachment rotation hole, preventing it from detaching axially (up and down). When the operator rotates the adjusting handwheel 14, the height adjustment stud 18 moves up and down along the adjusting screw hole 13 of the base sealing top plate 15 via threaded transmission. At this time, the anti-detachment rotation block rotates synchronously with the height adjustment stud 18, but due to the limiting effect of the anti-detachment rotation hole, it will not detach from the rotating connecting block 17. Meanwhile, the rigid connection between the anti-detachment rotation block and the rotating connecting block 17 transmits the axial force (the force of up and down movement) of the height adjustment stud 18 to the right lifting bearing seat 19 and the left lifting bearing seat 16, driving the active slitting roller 9 to rise and fall precisely. This "rotation without detachment, force transmission without deviation" coordination ensures the linear accuracy of the height adjustment of the active slitting roller 9, avoids adjustment errors caused by loose parts (such as the blade shaft gap fluctuating), and ensures the consistency of the slitting dimensions.

[0029] like Figure 1 , Figure 5 and Figure 6As shown, an auxiliary feeding and protection device 4 is provided between the two intermediate fixing blocks 5. The auxiliary feeding and protection device 4 includes a long strip thickened metal frame A20, a long strip thickened metal frame B21, a height adjustment chute 22, a U-shaped groove A23, an auxiliary feeding roller A24, a protective partition 25, a U-shaped groove B26, and an auxiliary feeding roller B27. The interior of each of the two intermediate fixing blocks 5 is vertically provided with a height adjustment chute 22. The bottom end of the two height adjustment chute 22 is connected to the long strip thickened metal frame A20. The bottom end and the front and rear ends of the long strip thickened metal frame A20 are welded and adjusted. The bottom end and the inner walls of the front and rear ends of the high chute 22 are fixedly connected. A long strip thickened metal frame B21 is set parallel above the long strip thickened metal frame A20. The left and right ends of the long strip thickened metal frame A20 and the long strip thickened metal frame B21 are respectively exposed on the outside of the two middle partition fixing blocks 5. The upper half of the center of the long strip thickened metal frame A20 is provided with a downwardly recessed U-shaped groove A23. The lower half of the center of the long strip thickened metal frame B21 is provided with an upwardly recessed U-shaped groove B26. An auxiliary feeding roller A24 is set inside the U-shaped groove A23. Inside B26, there is an auxiliary feeding roller B27. Both the auxiliary feeding rollers A24 and B27 are located between two intermediate fixing blocks 5. A protective partition 25 is welded to the top of the long, thick metal frame B21. The protective partition 25 extends vertically upward from the top of the long, thick metal frame B21. The protective partition 25 is located between the two intermediate fixing blocks 5 and also between the rear cutter holder assembly 1 and the front cutter holder assembly 2. The protective partition 25 at the top of the long, thick metal frame B21 extends vertically and its height covers the cutter head running of the front and rear cutter holder assemblies 1. The partition forms a longitudinal isolation barrier. When operators perform operations such as tool changing or cleaning in one set of tool holders (such as the rear tool holder), the partition can prevent limbs or tools from accidentally contacting another set of operating tool holders (such as the front tool holder), avoiding mechanical damage caused by high-speed rotating tools. The length of the protective partition 25 is consistent with the distance between the two middle partition fixing blocks 5, and the width covers the radial range of the tool holder, ensuring that there are no blind spots in the isolation. At the same time, the partition rises and falls synchronously with the long strip thickened metal frame B21, and always maintains effective shielding of the tool holder area regardless of the material thickness, adapting to the safety protection needs under different working conditions.

[0030] like Figure 1 , Figure 5 and Figure 6As shown, shaft holes are provided inside the upper left and right ends of the center of U-shaped groove A23 and the lower left and right ends of the center of U-shaped groove B26. Thickened metal shafts are provided at the center of the left and right ends of auxiliary feeding roller A24 and U-shaped groove B26. The thickened metal shafts at the left and right ends of auxiliary feeding roller A24 are respectively inserted into the shaft holes inside the left and right ends of U-shaped groove A23. The thickened metal shafts at the left and right ends of auxiliary feeding roller B27 are respectively inserted into the shaft holes inside the left and right ends of U-shaped groove B26. The top of auxiliary feeding roller A24 protrudes above the top outer wall of the long, thickened metal frame A20. The bottom end of roller B27 is exposed below the bottom outer wall of the long, thickened metal frame B21. The top outer wall of the auxiliary feeding roller A24 is on the same horizontal plane as the top outer wall of the auxiliary slitting roller 8. The auxiliary feeding rollers A24 and B can rotate flexibly through the cooperation of the thickened metal shaft and shaft hole. When the material passes between the two rollers, the rollers rotate synchronously with the material, using rolling friction to reduce damage to the surface of the material. At the same time, the axes of the two rollers are kept parallel to the active slitting roller 9 to ensure that the material has no lateral deviation in the conveying direction and always enters the cutting area of ​​the cutter head in a straight line, avoiding the deviation in cutting width caused by the bending of the material.

[0031] like Figure 1 , Figure 5 and Figure 6As shown, the auxiliary feeding and protection device 4 also includes a height adjustment nut A28, an adjustment connecting screw 29, a height adjustment nut B30, and a height adjustment lifting hole 32. The top outer wall of the elongated thickened metal frame A20 has vertically welded adjustment connecting screws 29 near both ends. The elongated thickened metal frame B21 has height adjustment lifting holes 32 near both ends, with the two adjustment connecting screws 29 passing through their corresponding height adjustment lifting holes 32. The lower outer side of the center of each of the two adjustment connecting screws 29 is threaded with a height adjustment nut A28, located at the bottom of the elongated thickened metal frame B21. The upper outer side of the center of each of the two adjustment connecting screws 29 is threaded with a height adjustment nut B30, located at the top of the elongated thickened metal frame B21. The elongated thickened metal frame B21 can be fixed to two intermediate blocks 5. The elongated thickened metal frame B21 moves up and down in the internal height adjustment groove 22. It can move up and down outside the adjusting connecting screw 29 through the height adjustment lifting hole 32. After the height adjustment nut A28 and height adjustment nut B30 are tightened at the bottom and top of the elongated thickened metal frame B21 respectively, the height of the elongated thickened metal frame B21 can be locked. The elongated thickened metal frame A20 is fixed at the bottom of the height adjustment groove 22. The auxiliary feeding roller A24 in its U-shaped groove A23 serves as the lower support point, forming a symmetrical clamping structure with the auxiliary feeding roller B27 of the upper elongated thickened metal frame B21. By adjusting the height adjustment nut A28 (bottom) and height adjustment nut B30 (top) on the connecting screw 29, the elongated thickened metal frame B21 can be driven to move up and down along the height adjustment groove 22, changing the distance between the two rollers to adapt to materials of different thicknesses.

[0032] like Figure 1 , Figure 5 and Figure 6As shown, the auxiliary feeding and protection device 4 also includes lifting guide holes 31 and lifting guide rods 33. Lifting guide holes 31 are provided on both the left and right sides of the two height adjustment lifting holes 32, and lifting guide rods 33 are provided on both the left and right sides of the two adjusting connecting screws 29. Multiple lifting guide rods 33 are vertically fixed to the top outer wall of the long, thickened metal frame A20 by welding, and the tops of the multiple lifting guide rods 33 pass through the corresponding lifting guide holes 31. The lifting guide holes 31 move up and down outside the lifting guide rods 33, and the length of the lifting guide rods 33 is equal to the length of the adjusting connecting screws 29. The long, thickened metal frames A20 and B are made of high-strength alloy steel and are connected to the central fixing block 5 by welding. They can withstand the vibration and material impact during the cutting process. The adjusting connecting screw 29 and the lifting guide rod 33 (symmetrically distributed on both sides of the height adjustment hole 32) form multi-point support to prevent the frame from tilting. The gap between the lifting guide hole 31 and the lifting guide rod 33 is controlled within a very small range, which can ensure that the long, thickened metal frame B21 moves up and down without jamming or offset, and ensure the relative position accuracy of the auxiliary feeding roller and the cutter head, so as to avoid the cutting quality or protection effect due to structural shaking.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A slitting cross double knife holder, comprising a front knife holder assembly (2) and a rear knife holder assembly (1) disposed on the rear side of the front knife holder assembly (2), wherein the left and right ends of the front knife holder assembly (2) and the rear knife holder assembly (1) are fixedly connected by a middle fixing block (5), and the bottom of the left and right ends of the front knife holder assembly (2) and the rear knife holder assembly (1) are connected to a mounting base plate (3), and the mounting base plate (3) can be fixed to the corresponding position on the slitting machine by bolts. The front knife holder assembly (2) and the rear knife holder assembly (1) are identical in shape, size and structural composition. The front knife holder assembly (2) comprises a right knife holder base (6), an auxiliary slitting roller (8), an active slitting roller (9), a metal fixing ring (10), a circular slitting cutter disc (11) and a left knife holder base (12). A left knife holder base is provided on the symmetrical left side of the right knife holder base (6). A knife holder base (12) is provided with an auxiliary slitting roller (8) between the lower center of the right knife holder base (6) and the left knife holder base (12). An active slitting roller (9) is provided parallel above the auxiliary slitting roller (8). Multiple metal retaining rings (10) are equidistantly sleeved on the outside of the active slitting roller (9). The left ends of the multiple metal retaining rings (10) are all fixed with a circular slitting disc (11) through an open ring. The metal retaining rings (10) are open, and the openings of the metal retaining rings (10) are connected by embedded screws. After the metal retaining rings (10) are sleeved on the outside of the active slitting roller (9), the openings of the metal retaining rings (10) can be tightened by tightening the embedded screws, so that the metal retaining rings (10) are tightened and fixed on the outside of the active slitting roller (9). The feature is that: An auxiliary feeding and protection device (4) is provided between the two intermediate fixing blocks (5); The auxiliary feeding and protection device (4) includes a long strip thickened metal frame A (20), a long strip thickened metal frame B (21), a height adjustment chute (22), a U-shaped groove A (23), an auxiliary feeding roller A (24), a protective partition (25), a U-shaped groove B (26), and an auxiliary feeding roller B (27). The two intermediate fixing blocks (5) are each vertically provided with a height adjustment chute (22). The bottom end of the two height adjustment chute (22) is connected to the long strip thickened metal frame A (20). The bottom end and the front and rear ends of the long strip thickened metal frame A (20) are fixedly connected to the bottom end and the inner wall of the front and rear ends of the height adjustment chute (22) by welding. The long strip thickened metal frame B (21) is provided parallel above the long strip thickened metal frame A (20). The left and right ends of the long strip thickened metal frame A (20) and the long strip thickened metal frame B (21) are respectively exposed on the two intermediate fixing blocks (5). On the outside of the long strip thickened metal frame A (20), the upper half of the center is provided with a downwardly recessed U-shaped groove A (23), the lower half of the center of the long strip thickened metal frame B (21) is provided with an upwardly recessed U-shaped groove B (26), the U-shaped groove A (23) is provided with an auxiliary feeding roller A (24), the U-shaped groove B (26) is provided with an auxiliary feeding roller B (27), the auxiliary feeding roller A (24) and the auxiliary feeding roller B (27) are both located in the area between two middle partition fixing blocks (5), the top of the long strip thickened metal frame B (21) is welded with a protective partition (25), the protective partition (25) extends vertically upward from the top of the long strip thickened metal frame B (21), the protective partition (25) is located between the two middle partition fixing blocks (5), and the protective partition (25) is also located between the rear tool holder assembly (1) and the front tool holder assembly (2).

2. The slit cross double-blade holder according to claim 1, characterized in that: Shaft holes are provided inside the upper left and right ends of the center of the U-shaped groove A (23) and the lower left and right ends of the center of the U-shaped groove B (26). Thickened metal shafts are provided at the center of the left and right ends of the auxiliary feeding roller A (24) and the U-shaped groove B (26). The thickened metal shafts at the left and right ends of the auxiliary feeding roller A (24) are respectively inserted into the shaft holes inside the left and right ends of the U-shaped groove A (23). The thickened metal shafts at the left and right ends of the auxiliary feeding roller B (27) are respectively inserted into the shaft holes inside the left and right ends of the U-shaped groove B (26). The top of the auxiliary feeding roller A (24) is exposed above the top outer wall of the long strip thickened metal frame A (20), while the bottom of the auxiliary feeding roller B (27) is exposed below the bottom outer wall of the long strip thickened metal frame B (21). The top outer wall of the auxiliary feeding roller A (24) and the top outer wall of the auxiliary slitting roller (8) are on the same horizontal plane.

3. A slit cross double-blade holder according to claim 2, characterized in that: The auxiliary feeding and protection device (4) also includes a height adjustment nut A (28), an adjustment connecting screw (29), a height adjustment nut B (30), and a height adjustment hole (32). The top outer wall of the long strip thickened metal frame A (20) is vertically welded with adjustment connecting screws (29) near the left and right ends. The long strip thickened metal frame B (21) is provided with height adjustment holes (32) near the left and right ends. The two adjustment connecting screws (29) pass through the height adjustment holes (32) corresponding to their positions. The lower outer side of the center of the two adjustment connecting screws (29) is threaded with a height adjustment nut A (28), and the height adjustment nut A (28) is located at the bottom of the long strip thickened metal frame B (21). The upper outer side of the center of the two adjustment connecting screws (29) is threaded with a height adjustment nut B (30), and the height adjustment nut B (30) is located at the top of the long strip thickened metal frame B (21).

4. A slit cross double-blade holder according to claim 3, characterized in that: The long strip thickened metal frame B (21) can move up and down in the height adjustment groove (22) inside the two middle fixed blocks (5). The long strip thickened metal frame B (21) can move up and down outside the adjusting connecting screw (29) through the height adjustment lifting hole (32). After the height adjustment nut A (28) and height adjustment nut B (30) are tightened at the bottom and top of the long strip thickened metal frame B (21) respectively, the height of the long strip thickened metal frame B (21) can be locked.

5. A slit cross double-blade holder according to claim 4, characterized in that: The auxiliary feeding and protection device (4) also includes lifting guide holes (31) and lifting guide rods (33). Lifting guide holes (31) are provided on both the left and right sides of the two height adjustment lifting holes (32), and lifting guide rods (33) are provided on both the left and right sides of the two adjustment connecting screws (29). Multiple lifting guide rods (33) are vertically fixed by welding to the top outer wall of the long strip thickened metal frame A (20), and the top of multiple lifting guide rods (33) passes through the lifting guide holes (31) corresponding to their positions. The lifting guide holes (31) move up and down outside the lifting guide rods (33), and the length of the lifting guide rods (33) is equal to the length of the adjustment connecting screws (29).

6. A slit cross double-blade holder according to claim 1, characterized in that: Bearings are fixed inside the lower side of the center of the right knife base (6) and the left knife base (12). Roller shafts are provided at both ends of the auxiliary slitting roller (8). The roller shafts at both ends of the auxiliary slitting roller (8) are respectively inserted into the bearings inside the lower side of the center of the right knife base (6) and the left knife base (12). Lifting adjustment grooves (7) are provided inside the upper side of the center of the right knife base (6) and the left knife base (12). The top of the right knife base (6) and the left knife base (12) are fixed with base sealing top plates (15) by screws. The two base sealing top plates (15) respectively seal the openings at the top of the two lifting adjustment grooves (7).

7. A slit cross double-blade holder according to claim 6, characterized in that: The right lifting bearing seat (19) and the left lifting bearing seat (16) are respectively provided in the lifting adjustment groove (7) inside the right knife seat base (6) and the lifting adjustment groove (7) inside the left knife seat base (12). The right lifting bearing seat (19) and the left lifting bearing seat (16) can slide up and down inside the lifting adjustment groove (7). The center of the two base sealing top plates (15) is provided with an adjustment screw hole (13). The two adjustment screw holes (13) are threaded with height adjustment studs (18). The top of the two height adjustment studs (18) is provided with an adjustment handwheel (14). The adjustment handwheel (14) can drive the height adjustment studs (18) to rotate clockwise and counterclockwise. The center of the left and right ends of the active slitting roller (9) is provided with a roller shaft. The roller shafts at both ends of the active slitting roller (9) are respectively inserted into the bearings inside the right lifting bearing seat (19) and the left lifting bearing seat (16).

8. A slit cross double-blade holder according to claim 7, characterized in that: The right lifting bearing seat (19) and the left lifting bearing seat (16) are both provided with a rotating connecting block (17) at the center of their top ends. The center of each of the two rotating connecting blocks (17) is provided with an anti-disengagement hole, and an anti-disengagement block is provided inside the anti-disengagement hole. The cross-sectional shape of the anti-disengagement hole and the anti-disengagement block is T-shaped, and the opening diameter at the top of the anti-disengagement hole is smaller than the diameter at the bottom. The bottom end of the height adjustment stud (18) is fixedly connected to the top end of the anti-disengagement block by welding.

9. A slit cross double-blade holder according to claim 8, characterized in that: The height adjustment stud (18) can rotate clockwise and counterclockwise to move up and down inside the adjustment screw hole (13) through the action of the thread. When the height adjustment stud (18) rotates clockwise and counterclockwise, it can drive the anti-disengagement block in the anti-disengagement hole to rotate synchronously. The anti-disengagement block can only rotate clockwise and counterclockwise in the anti-disengagement hole and cannot move up and down. When the height adjustment stud (18) moves up and down, it will drive the right lifting bearing seat (19) and the left lifting bearing seat (16) to move up and down inside the lifting adjustment groove (7) through the connecting action of the rotating connecting block (17).

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