SUMMERY OF THE UTILITY MODEL
Film guide cutter, its aim at solve above-mentioned problem and use defect and realize rotatory roller sword and hang the swing between the roller and lead cutting structure and method, the roller sword is led the extrusion on roller surface and is cut power and dynamic adjustment and play the effect of protection cutter body.
The design purpose still lies in, improves rotatory roller sword self structure and with hang the relative installation clearance of roller, realizes rotatory roller sword and leads the automatically regulated of cutting the effort, improves and leads and cut efficiency, reduce the work noise.
Another design objective is to realize a combined type cutting guide method of shearing, extruding and tearing, so as to remove heavy manual rubber cutting work and improve the overall automation rate of tire production.
In order to achieve the design purpose, the film guiding and cutting machine mainly comprises the following structures:
the roller knife cutting device comprises a rack, and a roller knife cutting device and a conveying device are arranged on the rack.
The driving motor drives the chain and the chain wheel to drive the conveying device to convey and lift the film to the roller knife cutting device.
The speed reduction motor drives the roller knife cutting device to cut the film.
The improvement is that the roller cutter cutting device is provided with an open box body, and a rotary roller cutter is transversely arranged in the box body through bearing seats on two sides.
A swinging mechanism is connected between two side plates of the box body, and a cold rolling roller which can realize reciprocating swing along the vertical central line of the swinging mechanism is hung below the swinging mechanism; the transverse center line of the rotary roller knife is parallel to the transverse center line of the cold rolling roller.
The periphery of the cold rolling roller and the blade edge part of the rotary roller knife form a negative clearance.
According to the technical characteristics, the installation gap between the cold rolling roller and the rotary roller cutter is a negative gap, namely the outer edges of the two parts are staggered, and when the blade of the rotary roller cutter rotates to the transverse center line of the cold rolling roller, the blade edge part can abut against and push the cold rolling roller backwards, so that the cold rolling roller swings backwards; after the rotating roller knife is disengaged from the cold roller, the cold roller is reset by the spring plate 237.
In the reciprocating swing process of the cold rolling roller, the rotary roller knife applies continuous and stable extrusion acting force to the film, so that the film is completely cut off, and meanwhile, the blade edge part of the blade cannot be damaged.
In order to improve the maneuverability and the flexibility of the reciprocating swing of the cold rolling roller, the swing mechanism is provided with a group of side plates, and the cold rolling roller is arranged between the side plates through a bearing seat. The side plates of the swing mechanism are connected and fixed with each other through connecting rods and are connected between the two side plates of the box body in a hanging mode through a hanging shaft above the side plates.
When the cold rolling roller is pressed by the rotating roller knife, the cold rolling roller swings around the central axis of the suspension shaft in a reciprocating manner.
In order to improve the micro-swing of the cold rolling roller in a certain pressure and range, an elastic return mechanism is arranged in the swing mechanism, wherein a half wedge pull rod seat is fixedly connected below the side plate, and the pull rod is sleeved on the half wedge pull rod seat;
the inner side end of the pull rod is connected with the box body, the outer side end of the pull rod is provided with a fastening nut and a limiting sleeve, and a plurality of groups of springs sleeved on the pull rod are arranged in the limiting sleeve.
The elastic restoring mechanism can play a role in pushing the cold rolling roller to reset, and has the more important role that the extrusion force of the blade edge part of the rotary roller knife on the cold rolling roller can be self-elastically adjusted in the process of cutting the film by the rotary roller knife, so that the effects of completely cutting off the film and protecting the knife body can be achieved.
Further, after the rotary roller blade is used for a long time, the blade edge portion is worn, but the gap between the blade edge portion and the cold rolling roller can be adjusted by the elastic force of the spring, so that it is not necessary to separately replace the rotary roller blade.
In a further development, the rotating roller knife can have a cylindrical blade carrier on which at least one inclined blade is mounted.
The shaft diameters of two ends of the tool rest are connected between two side plates of the box body through a pair of self-aligning roller bearings; the end part of the tool rest is provided with a rotary tool gear and a transmission chain meshed with the speed reducing motor.
The preferable scheme is that 2 blades symmetrically arranged along the rotating shaft of the tool rest are arranged on the periphery of the cylindrical surface of the tool rest, and included angles between the 2 blades and the axis of the rotating shaft of the tool rest are the same and are all between 5 and 10 degrees.
In order to improve the efficiency of the film guiding and cutting, a speed ratio gear set is arranged between the end part of the rotary roller cutter and the end part of the cold rolling roller, and comprises a rotary cutter gear, a transition gear, a sun gear and a planetary gear which are sequentially in meshing transmission;
the sun gear is sleeved at the shaft diameter end of the suspension shaft, and the planet gear is sleeved at the shaft diameter end of the cold rolling roller.
The speed reducing motor drives the rotary roller cutter to work, and the cold rolling roller is driven to rotate around the axis of the cold rolling roller through the rotary cutter gear. And after the direction of the transition gear and the direction of the sun gear are changed, the rotating direction of the rotating roller cutter is opposite to that of the cold rolling roller.
In order to further form the rotation dislocation between the rotary roller knife and the cold roller, 2 components are added when the rotary roller knife guides and cuts the film, and meanwhile, reverse dragging acting force is applied to the film so as to tear the film, and finally, the efficiency of guiding and cutting the film is improved, and the rotation speed of the rotary roller knife and the cold roller can be set to be different.
If the ratio of the rotating linear speed of the rotating knife gear to the rotating linear speed of the planetary gear is set to be (1.2-1.5): 1.
the power of the rotary roller cutter is derived from a speed reducing motor by adopting a speed ratio gear set structure, a chain wheel at the output end of the speed reducing motor transmits the power to the rotary roller cutter through a chain, and the other end of the rotary roller cutter is provided with the speed ratio gear set so as to transmit the power to the cold rolling roller.
When the cold rolling roller swings due to the negative clearance between the cold rolling roller and the rotary roller cutter, the planetary gear swings around the sun gear, and at the moment, the speed ratio gear set transmits power to the cold rolling roller.
No matter the cold rolling roller swings or the rotating diameter of the rotating roller knife changes due to the fact that the blades of the rotating roller knife are worn, the center distance of meshing gears in the speed ratio gear set cannot be changed.
To sum up, the utility model discloses film guide cutter has following advantage:
1. the swinging guide cutting method between the rotary roller cutter and the suspended roller is realized, and the extrusion guide cutting force of the roller cutter on the surface of the roller is dynamically adjusted to play a role in protecting the cutter body.
2. The self structure of the rotary roller cutter and the relative installation gap between the rotary roller cutter and the suspension roller are improved, so that the guide cutting efficiency can be effectively improved, and the working noise is reduced.
3. The combined type guide cutting method for realizing shearing, extruding and tearing can relieve heavy manual rubber cutting work and improve the integral automation rate of tire production.
Drawings
The present invention will now be further described with reference to the accompanying drawings
FIG. 1 is a schematic view of the film slitting machine;
FIG. 2 is a schematic view of the roller knife cutting apparatus;
FIG. 3 is a schematic structural view of the rotary roller cutter;
FIG. 4 is a schematic illustration of the speed ratio gear set;
FIG. 5 is a top view of the roller knife cutting assembly;
as shown in fig. 1 to 5, a frame 1, a roller cutter cutting device 2, a speed reduction motor 3, a conveying device 4, a driving motor 5, and a film 6;
the device comprises a box body 21, a rotary roller cutter 22, a blade 221, a cutter frame 222, a rotary cutter gear 223, a swing mechanism 23, a side plate 231, a suspension shaft 232, a half wedge pull rod seat 233, a pull rod 234, a fastening nut 235, a limiting sleeve 236, a spring 237 and a cold rolling roller 24;
a transition gear 61, a sun gear 62, and a planetary gear 63.
In fig. 3, the included angles a of the 2 blades 221 to the axis of the spindle of the blade holder 222 are all 8 °.
The arrows in fig. 4 indicate the direction in which the cold roll 24 oscillates slightly.
Detailed Description
Embodiment 1, as shown in fig. 1 to 5, the film guide cutter has a frame 1, and a roller blade cutting device 2, a reduction motor 3, a conveying device 4, and a drive motor 5 are provided on the frame 1. Wherein,
the drive motor 5 drives a chain and a sprocket to drive the conveyor 4 and lift the film 6 to the roller knife cutting device 2. The speed reducing motor 3 drives the roller cutter cutting device 2 to cut the film 6.
The roller knife cutting device 2 has an open box 21, and a rotary roller knife 22 is transversely installed in the box 21 through bearing blocks on two sides. A swing mechanism 23 is connected between two side plates of the box body 21, and a cold rolling roller 24 which can realize reciprocating swing along the vertical central line is hung below the swing mechanism 23.
The transverse center line of the rotating roller cutter 22 is parallel to the transverse center line of the cold rolling roller 24, and the periphery of the cold rolling roller 24 and the blade part 221 of the rotating roller cutter 22 form a negative clearance.
The swing mechanism 23 has a set of side plates 231, and the side plates 231 are connected and fixed to each other through a connecting rod, and are suspended and connected between the two side plates of the box 21 through a suspension shaft 232 above the side plates. The cold roll cylinder 24 is installed between the side plates 231 through a bearing housing.
An elastic return mechanism is arranged in the swing mechanism 23, wherein a half wedge pull rod seat 233 is fixedly connected below the side plate 231, and the pull rod 234 is sleeved on the half wedge pull rod seat 233; the inner end of the pull rod 234 is connected to the box body 21, the outer end thereof is provided with a fastening nut 235 and a limiting sleeve 236, and a plurality of groups of springs 237 sleeved on the pull rod 234 are arranged inside the limiting sleeve 236.
The rotary roller cutter 22 is provided with a columnar cutter rest 222, the shaft diameters of two ends of the cutter rest 222 are connected between two side plates of the box body 21 through a pair of self-aligning roller bearings, and a rotary cutter gear 223 is arranged at the end part of the cutter rest 222 and meshed with a transmission chain of the speed reducing motor 3.
The periphery of the cylindrical surface of the tool holder 222 is provided with 2 blades 221 symmetrically arranged along the rotating shaft of the tool holder 222, and the included angles between the 2 blades 221 and the axis of the rotating shaft of the tool holder 222 are all 8 degrees.
A speed ratio gear set is arranged between the end part of the rotary roller knife 22 and the end part of the cold roller 24 and comprises a rotary knife gear 223, a transition gear 61, a sun gear 62 and a planetary gear 63 which realize meshing transmission in sequence. The sun gear 62 is sleeved at the shaft diameter end of the suspension shaft 232, and the planet gear 63 is sleeved at the shaft diameter end of the cold rolling roller 24.
The ratio of the linear speed of the rotary knife gear 223 to the planetary gear 63 is (1.2-1.5): 1.
the compound cutting method of cutting, extruding and tearing is realized by applying the film cutting guide machine, the rotary roller cutter 22 is driven by the speed reducing motor 3, and the film is cut on the surface of the cold rolling roller 24 suspended below the swing mechanism 23.
When the rotary roller knife 22 shears the film, the cold rolling roller 24 swings backwards along the vertical central line of the swing mechanism 23, and the blade 221 of the rotary roller knife 22 exerts a continuous extrusion acting force with stable pressure value on the film on the surface of the cold rolling roller 24.
Meanwhile, the spring 237 compresses and applies an opposite direction elastic force to the cold roll tube 24, and the cold roll tube 24 tends to be stationary;
at the beginning of the film shearing action by the rotating knife 22, the rotating knife 22 is rotationally misaligned with the cold roller 24 while pulling the film in the opposite direction until the film is completely torn.
After the rotating knife 22 finishes shearing the film and disengages from the compression with the cold roller 24, the cold roller 24 is reset by the restoring force of the spring 237.