A portable slitting knife

Abstract

The utility model provides a movable slitting knife relates to slitting knife technical field, including slitting knife group, one end fixed connection of slitting knife group has the detection seat of supporting and fixing, the bottom surface of detection seat and the lowest point of slitting knife group are located same plane, the inside fixed mounting of detection seat has the pressure extruding block of slitting pressure detection. The utility model has the advantages of: setting up and slitting plane same plane distribution's pressure extruding block of the bottom of slitting knife group to the pressure of slitting knife slitting real -time monitoring, and according to monitoring data feedback control mobile support drive slitting knife group's position, can adjust the pressure of slitting according to the different of slitting material, avoid the problem of overcut or undercut, set up detection seat to support the protection to pressure extruding block, guarantee the stability of pressure extruding block work, can effectively improve the quality of slitting, guarantee the stability of slitting knife work.

Description

Technical Field

[0001] This utility model relates to the field of slitting knife technology, and in particular to a movable slitting knife. Background Technology

[0002] In industries such as metal processing, packaging materials, and textiles, slitting blades are crucial tools for cutting wide rolls of material (such as metal strips, plastic films, and fabrics) into narrow strips. They achieve precise slitting through the relative movement of the blade and the roll material, and the slitting accuracy (width deviation ≤ 0.1mm) directly impacts the quality of subsequent processed products. Movable slitting blades, by adjusting the blade position to meet different width slitting needs, are widely used in multi-variety, small-batch production scenarios and are important equipment for improving the flexibility of production lines.

[0003] However, existing slitting knives are not easy to adjust during operation, and when slitting different materials, they are prone to overcutting (material tearing) or undercutting (incomplete slitting), which affects the quality of slitting. Utility Model Content

[0004] Therefore, the purpose of this utility model is to propose a movable slitting knife to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, one embodiment of this utility model provides a movable slitting knife, including a movable support for support and drive. A slitting shaft connected to an external motor is rotatably connected inside the movable support. A slitting knife assembly for slitting is fixedly mounted on the surface of the slitting shaft. A detection seat for support and fixation is fixedly connected to one end of the slitting knife assembly. The bottom surface of the detection seat and the lowest point of the slitting knife assembly are located on the same plane. A pressure extrusion block for slitting pressure detection is fixedly mounted inside the detection seat. The pressure extrusion block is signal-connected to a PLC control unit for automatic control of the slitting knife. The PLC control unit is signal-connected to a telescopic drive block for adjusting the position of the slitting knife assembly. A laser rangefinder sensor for position detection is fixedly mounted inside the telescopic drive block. A highly elastic rubber pad for sealing and protecting the laser rangefinder sensor is provided on one side.

[0006] Preferably, in any of the above embodiments, the movable support includes a pneumatic telescopic rod connected to a PLC control unit and a slitting support for support and fixation. The top end of the pneumatic telescopic rod is fixedly installed with the slitting support, and the slitting shaft is fixedly installed inside the slitting support via a bearing. The slitting shaft has a groove inside for guiding the slitting knife assembly.

[0007] The above technical solution is adopted as follows: the pneumatic telescopic rod is driven by the PLC control unit and is installed on the equipment corresponding to the slitting knife. The corresponding slitting conveyor supports and fixes the pneumatic telescopic rod. Its top end is rigidly connected to the slitting support (made of gray cast iron) by bolts. The slitting shaft (45# steel heat-treated) is installed inside the slitting support through a deep groove ball bearing to ensure that the radial runout is very small during rotation. The internal groove of the slitting shaft provides guidance for the movement of the slitting knife group and restricts the knife group to slide only along the axial direction. When it is necessary to adjust the slitting pressure, the PLC controls the pneumatic telescopic rod to extend and retract, driving the slitting support to rise and fall, thereby changing the contact pressure between the slitting knife group and the roll material.

[0008] Preferably, in any of the above embodiments, the slitting knife assembly includes a fixed knife holder for support and a slitting knife for slitting. The fixed knife holder is fitted onto the surface of the slitting shaft, and the slitting knife is fixedly installed at one end of the fixed knife holder. The detection seat is fixedly installed at the bottom of the fixed knife holder, and the bottom surface of the detection seat and the lowest point of the slitting knife are located on the same plane.

[0009] The above technical solution is adopted as follows: The fixed knife holder (aluminum alloy material, anodized surface) is connected to the surface of the slitting shaft by a key and can slide along the slide groove. One end of the fixed knife holder is fixed with a screw to the slitting knife (high speed steel material). The detection seat (ABS material, with wear-resistant ceramic sheet attached to the bottom) is fixed to the bottom of the fixed knife holder. Its bottom surface is strictly coplanar with the lowest point of the slitting knife to ensure that the pressure block and the slitting knife contact the roll material synchronously during slitting, so as to achieve consistency between pressure detection and slitting action. The slitting knife rotates with the slitting shaft and cuts the roll material through the cutting edge. The fixed knife holder is adjusted in position by connecting with the telescopic drive block to adapt to different slitting width requirements.

[0010] Preferably, in any of the above embodiments, the pressure extrusion block includes a pressure sensor connected to the PLC control unit and a pressure-bearing block that bears the pressure. The pressure sensor is fixedly installed inside the monitoring base, and the detection end of the pressure sensor is fixedly installed with the pressure-bearing block located inside the monitoring base.

[0011] The above technical solution is adopted as follows: the pressure sensor (strain gauge type) is fixed inside the detection seat, and its detection end is rigidly connected to the pressure block (polyurethane material). When the slitting blade contacts the roll material, the pressure block is simultaneously subjected to the reaction force of the roll material. The pressure is transmitted to the sensor through the pressure block. The sensor converts the mechanical signal into an electrical signal and transmits it to the PLC control unit. The PLC compares the real-time pressure value with the preset threshold (set according to the roll material). If the pressure deviation exceeds the preset value, the pneumatic telescopic rod is driven to adjust the height of the slitting support until the pressure returns to the threshold range, thereby realizing closed-loop pressure control.

[0012] Preferably, in any of the above embodiments, the telescopic drive block includes an electric telescopic rod connected to a PLC control unit and a moving block that drives the fixed tool holder. The electric telescopic rod is fixedly installed inside the slitting shaft, and the moving block, which is fixedly installed on the output end of the electric telescopic rod, is also fixedly installed on the fixed tool holder.

[0013] The above technical solution is adopted as follows: the electric telescopic rod (ball screw type) is fixed inside the slitting shaft and driven by the analog signal of the PLC control unit. Its output end is connected to the moving block (45 steel, chrome plated) through the flange. The moving block is rigidly connected to the fixed knife holder by bolts. When the electric telescopic rod extends or retracts, it drives the fixed knife holder to slide along the slide groove of the slitting shaft to realize the position adjustment of the slitting knife group. During the adjustment process, the PLC controls the stroke of the telescopic rod according to the preset slitting width parameters (input through the human-machine interface) to ensure that the slitting width deviation is very small.

[0014] Preferably, in any of the above embodiments, the laser rangefinder is fixedly installed inside the moving block, the laser rangefinder is signal-connected to the PLC control unit, and the laser rangefinder is located on one side of the electric telescopic rod.

[0015] The above technical solution employs a laser rangefinder (triangular reflector type) fixed inside the moving block. Its detection beam is parallel to the slitting shaft axis and points towards the reference surface at the end of the slitting shaft. The sensor detects the distance between the moving block and the reference surface in real time and transmits the distance signal (RS485 communication) to the PLC control unit. The PLC calculates the distance change to obtain the actual position of the slitting knife group, compares it with the target position to form a closed-loop position control, and ensures the spacing accuracy between multiple slitting knives.

[0016] Preferably, in any of the above embodiments, the high-elasticity rubber pad is fixedly installed at both ends of the moving block, and the end of the high-elasticity rubber pad away from the moving block is fixedly installed with the slitting shaft.

[0017] The above technical solution is adopted: the high elasticity rubber pad (silicone rubber material) is fixed to both ends of the moving block through a vulcanization process, and its other end is tightly fitted to the inner wall of the slide groove of the sliding shaft. When the moving block slides, the rubber pad generates elastic deformation, absorbs the vibration during the sliding process, and avoids the impact load from affecting the accuracy of the laser rangefinder. At the same time, the rubber pad fills the gap between the moving block and the slide groove, forming a dustproof seal to prevent dust from entering and affecting the sliding accuracy.

[0018] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: 1. Pressure extrusion blocks, distributed on the same plane as the slitting plane, are installed at the bottom of the slitting knife assembly to monitor the slitting pressure of the slitting knife in real time. Based on the monitoring data feedback, the position of the slitting knife assembly is controlled by the moving bracket. The slitting pressure can be adjusted according to different slitting materials to avoid over-cutting or under-cutting. At the same time, a detection seat is set to support and protect the pressure extrusion blocks to ensure the stability of the pressure extrusion blocks. This can effectively improve the slitting quality and ensure the stability of the slitting knife operation.

[0019] 2. A telescopic drive block for driving the slitting knife assembly and a laser rangefinder sensor for detecting its position are installed at one end of the slitting knife assembly. The telescopic drive block can be controlled to adjust the position of the slitting knife assembly according to the slitting size, and the adjustment position of the slitting knife assembly can be determined by the detection feedback of the laser rangefinder sensor, thereby improving the slitting accuracy.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure according to an embodiment of the present utility model; Figure 2 This is a partial structural schematic diagram according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the slitting knife assembly according to an embodiment of the present utility model; Figure 4 This is a cross-sectional structural diagram of the slitting knife assembly according to an embodiment of the present utility model; The components are: 1-moving bracket, 11-pneumatic telescopic rod, 12-slitting support, 2-slitting shaft, 3-slitting knife assembly, 31-fixed knife holder, 32-slitting knife, 4-detection seat, 5-pressure extrusion block, 51-pressure sensor, 52-pressure block, 6-telescopic drive block, 61-electric telescopic rod, 62-moving block, 7-laser rangefinder sensor, and 8-high elasticity rubber pad. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0023] like Figure 1-4As shown, a movable slitting knife according to an embodiment of the present invention includes a movable support 1 for support and drive. A slitting shaft 2 connected to an external motor is rotatably connected inside the movable support 1. A slitting knife assembly 3 for slitting is fixedly installed on the surface of the slitting shaft 2. A detection seat 4 for support and fixation is fixedly connected to one end of the slitting knife assembly 3. The bottom surface of the detection seat 4 and the lowest point of the slitting knife assembly 3 are located on the same plane. A pressure extrusion block 5 for slitting pressure detection is fixedly installed inside the detection seat 4. The pressure extrusion block 5 is signal-connected to a PLC control unit for automatic control of the slitting knife. The PLC control unit is signal-connected to a telescopic drive block 6 for adjusting the position of the slitting knife assembly 3. A laser rangefinder sensor 7 for detecting its position is fixedly installed inside the telescopic drive block 6. A high-elasticity rubber pad 8 is provided on one side of the laser rangefinder sensor 7 for sealing and protection.

[0024] Preferably, in any of the above schemes, the movable support 1 includes a pneumatic telescopic rod 11 connected to the PLC control unit and a slitting support 12 for support and fixation. The top end of the pneumatic telescopic rod 11 is fixedly installed with the slitting support 12. The slitting shaft 2 is fixedly installed inside the slitting support 12 by bearings. The slitting shaft 2 has a groove inside to guide the slitting knife group 3.

[0025] The above technical solution is adopted: the pneumatic telescopic rod 11 is driven by the PLC control unit. The pneumatic telescopic rod 11 is installed on the equipment corresponding to the slitting knife. The corresponding slitting conveying equipment supports and fixes the pneumatic telescopic rod 11. Its top end is rigidly connected to the slitting support 12 (made of gray cast iron) by bolts. The slitting shaft 2 (45# steel heat-treated) is installed inside the slitting support through a deep groove ball bearing to ensure that the radial runout is very small when rotating. The internal groove of the slitting shaft provides guidance for the movement of the slitting knife group 3, restricting the knife group to slide only along the axial direction. When it is necessary to adjust the slitting pressure, the PLC controls the pneumatic telescopic rod to extend and retract, driving the slitting support to rise and fall, changing the contact pressure between the slitting knife group and the roll material.

[0026] Preferably, the slitting knife assembly 3 includes a fixed knife holder 31 for support and a slitting knife 32 for slitting. The fixed knife holder 31 is fitted onto the surface of the slitting shaft 2. The slitting knife 32 is fixedly installed at one end of the fixed knife holder 31. The detection seat 4 is fixedly installed at the bottom of the fixed knife holder 31. The bottom surface of the detection seat 4 and the lowest point of the slitting knife 32 are located on the same plane.

[0027] The above technical solution is adopted: the fixed knife holder 31 (aluminum alloy material, anodized surface) is connected to the surface of the slitting shaft 2 by a key and can slide along the slide groove. One end of the fixed knife holder 31 is fixed with a screw to the slitting knife 32 (high speed steel material). The detection seat 4 (ABS material, with wear-resistant ceramic sheet attached to the bottom) is fixed to the bottom of the fixed knife holder. Its bottom surface is strictly coplanar with the lowest point of the slitting knife to ensure that the pressure block 52 and the slitting knife contact the roll material synchronously during slitting, so as to achieve consistency between pressure detection and slitting action. The slitting knife rotates with the slitting shaft and cuts the roll material through the cutting edge. The fixed knife holder is adjusted in position by connecting with the telescopic drive block 6 to adapt to different slitting width requirements.

[0028] Preferably, in any of the above schemes, the pressure extrusion block 5 includes a pressure sensor 51 connected to the PLC control unit and a pressure receiving block 52 that bears the pressure. The pressure sensor 51 is fixedly installed inside the monitoring base 4, and the detection end of the pressure sensor 51 is fixedly installed with the pressure receiving block 52 located inside the detection base 4.

[0029] The above technical solution is adopted: the pressure sensor 51 (strain gauge type) is fixed inside the detection seat 4, and its detection end is rigidly connected to the pressure block 52 (polyurethane material). When the slitting blade contacts the roll material, the pressure block is simultaneously subjected to the reaction force of the roll material. The pressure is transmitted to the sensor through the pressure block. The sensor converts the mechanical signal into an electrical signal and transmits it to the PLC control unit. The PLC compares the real-time pressure value with the preset threshold (set according to the roll material). If the pressure deviation exceeds the preset value, the pneumatic telescopic rod 11 is driven to adjust the height of the slitting support until the pressure returns to the threshold range, thereby realizing closed-loop pressure control.

[0030] Preferably, in any of the above embodiments, the telescopic drive block 6 includes an electric telescopic rod 61 connected to the PLC control unit and a moving block 62 that drives the fixed tool holder 31. The electric telescopic rod 61 is fixedly installed inside the slitting shaft 2, and the moving block 62, which is fixedly installed on the output end of the electric telescopic rod 61, is also fixedly installed on the fixed tool holder 31.

[0031] The above technical solution is adopted: the electric telescopic rod 61 (ball screw type) is fixed inside the slitting shaft 2 and driven by the analog signal of the PLC control unit. Its output end is connected to the moving block 62 (45 steel, chrome plated) through the flange. The moving block is rigidly connected to the fixed knife holder 31 by bolts. When the electric telescopic rod extends or retracts, it drives the fixed knife holder to slide along the slide groove of the slitting shaft, thereby realizing the position adjustment of the slitting knife group 3. During the adjustment process, the PLC controls the stroke of the telescopic rod according to the preset slitting width parameters (input through the human-machine interface) to ensure that the slitting width deviation is very small.

[0032] Preferably, in any of the above schemes, the laser rangefinder 7 is fixedly installed inside the movable block 62, the laser rangefinder 7 is connected to the PLC control unit, and the laser rangefinder 7 is located on one side of the electric telescopic rod 61.

[0033] The above technical solution employs a laser rangefinder 7 (triangular reflector type) fixed inside the moving block 62. Its detection beam is parallel to the slitting shaft axis and points towards the reference surface at the end of the slitting shaft. The sensor detects the distance between the moving block and the reference surface in real time and transmits the distance signal (RS485 communication) to the PLC control unit. The PLC calculates the distance change to obtain the actual position of the slitting knife group, compares it with the target position to form a closed-loop position control, and ensures the spacing accuracy between multiple slitting knives.

[0034] Preferably, in any of the above solutions, the high-elasticity rubber pad 8 is fixedly installed at both ends of the movable block 62, and the end of the high-elasticity rubber pad 8 away from the movable block 62 is fixedly installed with the slitting shaft 2.

[0035] The above technical solution is adopted: the high elasticity rubber pad 8 (silicone rubber material) is fixed to both ends of the moving block 62 through a vulcanization process, and its other end is tightly fitted to the inner wall of the groove of the sliding shaft 2. When the moving block slides, the rubber pad generates elastic deformation, absorbs the vibration during the sliding process, and avoids the impact load from affecting the accuracy of the laser rangefinder 7. At the same time, the rubber pad fills the gap between the moving block and the groove, forming a dustproof seal to prevent dust from entering and affecting the sliding accuracy.

[0036] The working principle of this utility model of a movable slitting knife is as follows: An external motor drives the slitting shaft 2 to rotate within the slitting support 12 of the moving bracket 1. The fixed blade holder 31 of the slitting blade assembly 3 is distributed along the sliding groove on the surface of the slitting shaft. The slitting blade 32 rotates with the slitting shaft to slit the roll material. The PLC control unit drives the electric telescopic rod 61 of the telescopic drive block 6 according to preset parameters. The fixed blade holder moves through the moving block 62 to adjust the slitting blade spacing. The laser range sensor 7 detects the position of the moving block in real time and feeds it back to the PLC to ensure accurate slitting width. During slitting, the detection seat 4 contacts the roll material synchronously with the fixed blade holder. The pressure block 52 of the internal pressure squeezing block 5 is subjected to force. The pressure sensor 51 transmits the signal to the PLC. If the pressure deviates from the threshold, the PLC controls the pneumatic telescopic rod 11 of the moving bracket 1 to extend and retract, adjusting the height of the slitting support to correct the slitting pressure. When the moving block slides, the high-elasticity rubber pads 8 at both ends absorb vibration and seal against dust, ensuring stable operation of the laser range sensor. All structures work together through PLC closed-loop control to achieve precise adjustment of slitting position and pressure.

[0037] Compared with the prior art, the present invention has the following advantages: 1. A pressure extrusion block 5 is set at the bottom of the slitting knife assembly 3 and distributed on the same plane as the slitting plane to monitor the slitting pressure of the slitting knife in real time. Based on the monitoring data feedback, the moving bracket 1 is controlled to drive the position of the slitting knife assembly 3. The slitting pressure can be adjusted according to different slitting materials to avoid over-cutting or under-cutting. At the same time, a detection seat 4 is set to support and protect the pressure extrusion block 5 to ensure the stable operation of the pressure extrusion block 5, which can effectively improve the slitting quality and ensure the stability of the slitting knife operation.

[0038] 2. A telescopic drive block 6 for driving the slitting knife assembly 3 and a laser rangefinder 7 for detecting its position are provided at one end of the slitting knife assembly 3. The telescopic drive block 6 can be controlled to adjust the position of the slitting knife assembly 3 according to the slitting size, and the adjustment position of the slitting knife assembly 3 can be determined by the detection feedback of the laser rangefinder 7, thereby improving the slitting accuracy.

Claims

1. A movable slitting knife, comprising a movable support (1) for support and drive, wherein a slitting shaft (2) connected to an external motor is rotatably connected inside the movable support (1), and a slitting knife assembly (3) for slitting is fixedly mounted on the surface of the slitting shaft (2), characterized in that: One end of the slitting knife assembly (3) is fixedly connected to a detection seat (4) for support and fixation. The bottom surface of the detection seat (4) and the lowest point of the slitting knife assembly (3) are located on the same plane. A pressure extrusion block (5) for slitting pressure detection is fixedly installed inside the detection seat (4). The pressure extrusion block (5) is signal-connected to a PLC control unit for automatic control of the slitting knife. The PLC control unit is signal-connected to a telescopic drive block (6) for adjusting the position of the slitting knife assembly (3). A laser range sensor (7) for detecting its position is fixedly installed inside the telescopic drive block (6). A high-elasticity rubber pad (8) for sealing and protecting the laser range sensor (7) is provided on one side.

2. A movable slitting knife as described in claim 1, characterized in that: The movable support (1) includes a pneumatic telescopic rod (11) connected to the PLC control unit and a slitting support (12) for support and fixation. The top end of the pneumatic telescopic rod (11) is fixedly installed with the slitting support (12). The slitting shaft (2) is fixedly installed inside the slitting support (12) by bearings. The slitting shaft (2) has a groove inside to guide the slitting knife group (3).

3. A movable slitting knife as described in claim 2, characterized in that: The slitting knife assembly (3) includes a fixed knife holder (31) for support and a slitting knife (32) for slitting. The fixed knife holder (31) is fitted onto the surface of the slitting shaft (2). The slitting knife (32) is fixedly installed at one end of the fixed knife holder (31). The detection seat (4) is fixedly installed at the bottom of the fixed knife holder (31). The bottom surface of the detection seat (4) and the lowest point of the slitting knife (32) are located on the same plane.

4. A movable slitting knife as described in claim 3, characterized in that: The pressure extrusion block (5) includes a pressure sensor (51) connected to the PLC control unit and a pressure block (52) that bears the pressure. The pressure sensor (51) is fixedly installed inside the detection seat (4), and the detection end of the pressure sensor (51) is fixedly installed with the pressure block (52) located inside the detection seat (4).

5. A movable slitting knife as described in claim 4, characterized in that: The telescopic drive block (6) includes an electric telescopic rod (61) connected to the PLC control unit and a moving block (62) that drives the fixed tool holder (31). The electric telescopic rod (61) is fixedly installed inside the slitting shaft (2), and the output end of the electric telescopic rod (61) is fixedly installed with the moving block (62) which is fixedly installed with the fixed tool holder (31).

6. A movable slitting knife as described in claim 5, characterized in that: The laser rangefinder (7) is fixedly installed inside the movable block (62). The laser rangefinder (7) is connected to the PLC control unit. The laser rangefinder (7) is located on one side of the electric telescopic rod (61).

7. A movable slitting knife as described in claim 6, characterized in that: The high elasticity pad (8) is fixedly installed at both ends of the moving block (62), and the end of the high elasticity pad (8) away from the moving block (62) is fixedly installed with the slitting shaft (2).

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