A rotary cutting machine capable of adjusting the size and drop of a knife slit

Abstract

This invention discloses a veneer lathe with adjustable kerf size and drop, relating to the field of veneer lathe technology. The veneer lathe with adjustable kerf size and drop includes: a base, a double-row roller unit, a single-row roller unit, a linear drive unit, a blade holder, a veneer blade, a kerf adjustment unit, and a dynamic position stabilization unit; the blade holder is fixed on the base, and the veneer blade is fixed on the blade holder; the double-row roller unit slides on the base and is located on the opposite side of the blade holder; the linear drive unit includes a first motor fixed on the base, and a lead screw driven by the main shaft of the first motor; the lead screw is threadedly driven by the double-row roller unit. This invention solves the stability problem of the supporting bending plate during operation, ensuring the normal operation of the equipment and avoiding safety hazards; and when driving the first cam to rotate, it ensures that the supporting bending plate rotates according to the diameter of the first cam, realizing automatic adjustment of the kerf size and drop.

Description

Technical Field

[0001] This invention relates to the field of rotary cutting machine technology, and specifically to a rotary cutting machine with adjustable slit size and drop. Background Technology

[0002] A veneer lathe is a device used to ring-cut round logs to produce veneers, which are primarily used for veneer production of plywood, veneer sheets, and other engineered wood products. Currently, when ring-cutting veneers of different thicknesses, workers generally need to manually adjust the kerf distance between the veneer blade and the single-row rollers, which is a relatively cumbersome operation.

[0003] In order to achieve automatic adjustment of the blade seam, the applicant has made structural improvements to the veneer lathe. The design principle of the improved veneer lathe can be briefly described as follows: a support plate is hinged to each side of the blade holder, a transmission bearing is rotatably connected to the end of the support plate, and a first cam that can be actively rotated is set below the transmission bearing; the transmission bearing and the first cam are in rolling contact; a single row of rollers is fixed on the support plate.

[0004] When the first cam rotates, its rotation causes the support plate to rotate and change according to the diameter of the cam. This rotation adjusts the height of the single-row rollers, thus changing the kerf size and automatically adjusting the kerf size and the height difference between the rotary cutter and the log surface. (See detailed diagram.) Figure 3 .

[0005] The applicant discovered the following technical problems when using the aforementioned veneer laminating machine in actual operation:

[0006] (1) Because one side of the support plate is hinged to the blade holder to form a lever principle, but the other side of the support plate is not fixed, when it encounters the impact of hard wood, it will cause the support plate to vibrate. The vibration will affect the stability of the blade seam, thus affecting the quality of the ring cut.

[0007] (2) If the support plate is subjected to a large external force (such as the cutting resistance of hardwood), it may cause one side of the support plate to flip over, which may even cause the equipment to stop or be damaged; flipping over will not only affect the normal operation of the equipment, but may also cause safety hazards.

[0008] (3) However, when the structure is fixed on the other side of the support plate and the first cam is driven to rotate to adjust the cutter gap, the support plate cannot rotate with the wheel diameter of the first cam, so the cutter gap size and drop cannot be adjusted.

[0009] Therefore, how to solve the above-mentioned technical problems is a technical problem that those skilled in the art need to solve.

[0010] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0011] To address the aforementioned technical problems, embodiments of the present invention provide a rotary cutting machine with adjustable kerf size and drop, thereby solving the problems mentioned in the background art.

[0012] This invention provides the following technical solutions:

[0013] A rotary veneer with adjustable kerf size and drop; comprising: a base, a double-row roller unit, a single-row roller unit, a linear drive unit, a blade table, a rotary veneer, a kerf adjustment unit, and a dynamic position stabilization unit;

[0014] The blade holder is fixed on the machine base, and the rotary cutter is fixed on the blade holder; the double-row roller unit slides on the machine base and is located on the opposite side of the blade holder;

[0015] The linear drive unit includes a first motor fixed on the base and a lead screw driven by the main shaft of the first motor; the lead screw is threadedly driven by the double-row roller unit.

[0016] The cutter adjustment unit includes a support plate, a transmission bearing, a first cam, a first transmission shaft, a rotating shaft seat, and a second motor.

[0017] The support bending plate includes two plates, which are hinged to both sides of the tool holder; a single row roller unit is fixed to the top of the two support bending plates; and a transmission bearing is rotatably connected to the side of the support bending plate away from the tool holder.

[0018] The rotating shaft seat includes two rotating shaft seats, which are fixedly and spaced apart on the machine base. One rotating shaft seat is located below each transmission bearing.

[0019] The first drive shaft is rotatably connected between two shaft seats; the second motor is mounted on the base and the main shaft of the second motor is driven by the first drive shaft.

[0020] The first cam includes two cams, which are fixed at intervals on the first drive shaft; each first cam is located directly below a drive bearing, and the drive bearing on the same side is in rolling contact with the first cam.

[0021] The dynamic position stabilization unit is connected between the first drive shaft and the support plate; the dynamic position stabilization unit can automatically adjust its length as the first cam rotates to compensate for the change in distance between the first drive shaft and the support plate caused by the rotation of the first cam.

[0022] Preferably, the dynamic position stabilization unit includes: a fixed shaft, a fixed bushing, and a connecting rod compensation module;

[0023] The fixed bushings include two, which are respectively fixed to the support bend plate; the fixed shaft is fixed to the two fixed bushings.

[0024] The linkage compensation module includes a long cylindrical body, a side conical body, a second cam, a bolt, a connecting rod, a spring, a short cylindrical body, and a rotating bushing;

[0025] The long cylindrical body and the short cylindrical body are coaxially rotatably connected; the long cylindrical body and the short cylindrical body are coaxially provided with through shaft holes; the long cylindrical body and the short cylindrical body are rotatably connected to the first transmission shaft through the shaft holes;

[0026] The short cylindrical body is provided with multiple radial holes, and bolts are inserted into the radial holes to lock the short cylindrical body onto the first drive shaft;

[0027] The elongated cylindrical body has a cam movable cavity coaxial with the shaft hole. The second cam is disposed in the cam movable cavity and fixedly connected to the first drive shaft. The second cam is the same size and shape as the first cam.

[0028] The side cone is fixed to the side wall of the long cylindrical body, and a cylindrical cavity is provided on the side cone along its length direction, which communicates with the cam movable cavity on the long cylindrical body; the cavity wall of the cylindrical cavity is provided with internal threads;

[0029] The bolt thread is locked onto the internal thread of the cylindrical cavity; a through hole is provided on the bolt along its axial direction; the connecting rod is movably inserted into the through hole of the bolt;

[0030] The lower end of the connecting rod has a hemispherical surface structure and its lower end is in sliding contact with the second cam; the upper end of the connecting rod is fixedly connected to a rotating bushing; the rotating bushing is rotatably connected to a fixed shaft;

[0031] The spring is set in the cylindrical cavity and sleeved on the connecting rod; the lower end of the spring is fixedly connected to the connecting rod, and the upper end of the spring is fixedly connected to the tail of the bolt.

[0032] Preferably, the short cylindrical body is also provided with an annular groove coaxial with the shaft hole, and the diameter of the annular groove is larger than the diameter of the shaft hole; the end of the long cylindrical body is provided with an annular limiting plate that matches the size of the annular groove, and the annular limiting plate is rotatably connected in the annular groove.

[0033] Preferably, a log feeder is provided on one side of the rotary cutting machine; the log feeder is positioned close to the double-row roller unit.

[0034] Preferably, the log feeder includes: a log storage rack, a log feeding seat, a log feeding unit, a stop bar, and a log rolling plate;

[0035] The top of the log storage rack is equipped with a storage ramp; the log loading seat is located near the log storage rack and at the lower end of the storage ramp.

[0036] The log feeding unit includes a second drive shaft, a material support plate, a material limiting plate, a material support block, a cylinder, and a third motor;

[0037] The log loading platform has a storage chamber, and the cylinder is fixed in the storage chamber of the log loading platform; the cylinder includes two cylinders, and the drive rods of the two cylinders pass upward through the top working surface of the log loading platform;

[0038] The material support plate is set on the top working surface of the log loading seat, and the bottom surface of the material support plate is fixedly connected to the drive rods of the two cylinders.

[0039] On the top working surface of the log loading base, there is a vertical plate on each side of the support plate. The vertical plate has a vertically arranged sliding channel, and a slider is slidably connected in the sliding channel.

[0040] An arc-shaped groove is provided on the top surface of the material support plate along the length of the material support plate. The second drive shaft is rotatably connected in the arc-shaped groove, and both ends of the second drive shaft are rotatably connected to the slider.

[0041] The third motor is fixed on one of the sliders, and the main shaft of the third motor is driven by the second transmission shaft.

[0042] The material support block includes multiple blocks, which are fixed at intervals on the second drive shaft; a V-shaped groove is provided on the top of the material support block; and a relief groove for the material support block to rotate is provided on the corresponding position below each material support block.

[0043] The material limiting upright is vertically fixed to one side of the material support plate and is positioned close to the log storage rack; wherein, when the cylinder drive rod is in the retracted state, the upper end of the material limiting upright is lower than the lower end of the storage inclined plate.

[0044] The material stop bar is fixed on the round log loading seat and located on the other side of the material support plate;

[0045] The log rolling plate is fixed to the log feeding seat by a support plate. The height of the log rolling plate is greater than the top of the stop bar. The lower end of the log rolling plate extends to the top of the double-row roller unit.

[0046] The rotary cutting machine with adjustable slit size and drop provided by the present invention has the following beneficial effects: the present invention solves the stability problem of the operating state of the support bending plate, which can ensure the normal operation of the equipment and avoid safety hazards; and when driving the first cam to rotate, it can ensure that the support bending plate rotates and changes with the wheel diameter of the first cam, thereby realizing automatic adjustment of slit size and drop. Attached Figure Description

[0047] Figure 1This is a schematic diagram of the structure of the present invention from one angle;

[0048] Figure 2 This is a schematic diagram of the structure from angle two of the present invention;

[0049] Figure 3 This is a cross-sectional view of the present invention.

[0050] Figure 4 For the present invention Figure 1 A magnified view of part A in the image;

[0051] Figure 5 For the present invention Figure 2 A magnified view of part B in the image;

[0052] Figure 6 This is a partial cross-sectional structural diagram of angle one of the connecting rod compensation module in this invention;

[0053] Figure 7 This is a partial cross-sectional structural diagram of angle two of the connecting rod compensation module in this invention;

[0054] Figure 8 This is a schematic diagram of the structure of the log feeding machine at angle one in this invention;

[0055] Figure 9 This is a schematic diagram of the structure of the log feeding machine at angle two in this invention;

[0056] Figure 10 For the present invention Figure 8 Cross-sectional view along the CC direction;

[0057] Figure 11 For the present invention Figure 9 A magnified view of part D;

[0058] Figure 12 For the present invention Figure 10 A magnified view of part E in the image. Detailed Implementation

[0059] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] See Figures 1-12 .

[0061] To address the problems mentioned in the background section, this invention provides a rotary cutting machine with adjustable kerf size and drop to solve the aforementioned technical problems. The technical solution is as follows:

[0062] Example 1

[0063] A rotary veneer with adjustable kerf size and drop; comprising: a base 110, a double-row roller unit, a single-row roller unit, a linear drive unit, a blade holder 141, a rotary veneer blade 142, a kerf adjustment unit, and a dynamic position stabilization unit;

[0064] The single-row roller unit is equipped with one actively rotatable single-row roller; the double-row roller unit is equipped with two actively rotatable double-row rollers; both the single-row roller and the double-row roller are driven by independent motors.

[0065] The blade holder 141 is fixed on the machine base 110, and the rotary cutter 142 is fixed on the blade holder 141; the double-row roller unit slides on the machine base 110 and is located on the opposite side of the blade holder 141; specifically, the machine base 110 is provided with a slide rail 133, and the bottom of the double-row roller unit is provided with a sliding block 134; the double-row roller unit slides on the slide rail 133 of the machine base 110 through the sliding block 134;

[0066] The linear drive unit includes a first motor 131 fixed on the base 110, and a lead screw 132 driven by the main shaft of the first motor 131; the lead screw 132 is threadedly driven to the double-row roller unit; specifically, the lead screw 132 is threadedly connected to the housing of the double-row roller unit.

[0067] The cutter adjustment unit includes a support plate 161, a transmission bearing 162, a first cam 163, a first transmission shaft 165, a rotating shaft seat 164, and a second motor 166.

[0068] The support bending plate 161 includes two plates, which are respectively hinged to both sides of the knife holder 141; the single-row roller unit is fixed on the top of the two support bending plates 161; the transmission bearing 162 is rotatably connected to the side of the support bending plate 161 away from the knife holder 141.

[0069] The rotating shaft seat 164 includes two, which are fixedly and spaced apart on the machine base 110. One rotating shaft seat 164 is provided below each transmission bearing 162.

[0070] The first drive shaft 165 is rotatably connected between two shaft seats 164; the second motor 166 is mounted on the base 110 and the main shaft of the second motor 166 is drivenly connected to the first drive shaft 165.

[0071] The first cam 163 includes two cams, which are fixed at intervals on the first drive shaft 165; each first cam 163 is located directly below a drive bearing 162, and the drive bearing 162 on the same side is in rolling contact with the first cam 163.

[0072] The dynamic position stabilization unit is connected between the first drive shaft 165 and the support plate 161. The dynamic position stabilization unit can automatically adjust its length as the first cam 163 rotates to compensate for the change in distance between the first drive shaft 165 and the support plate 161 caused by the rotation of the first cam 163.

[0073] In this embodiment, the dynamic position stabilization unit includes: a fixed shaft 172, a fixed shaft sleeve 171, and a connecting rod compensation module 180;

[0074] The fixed bushing 171 includes two, and the two fixed bushings 171 are respectively fixed on the support bending plate 161; the fixed shaft 172 is fixed on the two fixed bushings 171;

[0075] The linkage compensation module 180 includes a long cylindrical body 181, a side conical body 182, a second cam 183, a bolt 184, a connecting rod 185, a spring 186, a short cylindrical body 187, and a rotating bushing 188;

[0076] The long cylindrical body 181 and the short cylindrical body 187 are coaxially rotatably connected; the long cylindrical body 181 and the short cylindrical body 187 are coaxially provided with a through shaft hole 181a; the long cylindrical body 181 and the short cylindrical body 187 are rotatably connected to the first transmission shaft 165 through the shaft hole 181a.

[0077] The short cylindrical body 187 is provided with a plurality of radial holes 187a, and bolts are inserted into the radial holes 187a to lock the short cylindrical body 187 onto the first drive shaft 165; however, since the long cylindrical body 181 is coaxially rotatably connected to the short cylindrical body 187, the long cylindrical body 181 can rotate freely on the first drive shaft 165.

[0078] The elongated cylindrical body 181 has a cam movable cavity 181b coaxially arranged with the shaft hole 181a. The second cam 183 is disposed in the cam movable cavity 181b and fixedly connected to the first transmission shaft 165. The second cam 183 is the same size and shape as the first cam 163. At the same time, the second cam 183 and the first cam 163 have the same mounting angle on the first transmission shaft 165. In this way, the synchronization of the movement and rotation of the first cam 163 and the second cam 183 can be ensured.

[0079] The side cone 182 is fixed to the side wall of the long cylindrical body 181. The side cone 182 is provided with a cylindrical cavity 182a along its length direction, which communicates with the cam movable cavity 181b on the long cylindrical body 181. The cavity wall of the cylindrical cavity 182a is provided with internal threads.

[0080] Bolt 184 is threaded and locked onto the internal thread of cylindrical cavity 182a; a through hole is provided on bolt 184 along its axial direction; connecting rod 185 is movably inserted into the through hole of bolt 184;

[0081] The lower end of the connecting rod 185 has a hemispherical surface structure and its lower end is in sliding contact with the second cam 183; the upper end of the connecting rod 185 is fixedly connected to the rotating bushing 188; the rotating bushing 188 is rotatably connected to the fixed shaft 172.

[0082] Spring 186 is disposed in cylindrical cavity 182a and sleeved on connecting rod 185; lower end of spring 186 is fixedly connected to connecting rod 185, and upper end of spring 186 is fixedly connected to tail of bolt 184.

[0083] In this embodiment, the short cylindrical body 187 is also provided with an annular groove 187b coaxially arranged with the shaft hole 181a, and the diameter of the annular groove 187b is larger than the diameter of the shaft hole 181a; the end of the long cylindrical body 181 is provided with an annular limiting plate 181b that is adapted to the size of the annular groove 187b, and the annular limiting plate 181b is rotatably connected in the annular groove 187b.

[0084] The working method of the rotary cutting machine with adjustable kerf size and drop provided in this embodiment is as follows:

[0085] 1. Control the second motor 166 to work and drive the first transmission shaft 165 and the first cam 163 to rotate; the rotation of the first cam 163 can cause the support plate 161 to rotate and change with the wheel diameter of the first cam 163, thereby realizing the adjustment of the cut size;

[0086] 2. When the second motor 166 is working, the second cam 183 will rotate synchronously with the first cam 163. The connecting rod 185 in the connecting rod compensation module 180 can move in length extension and retraction within the cylindrical cavity 182a of the side cone 182 as the wheel diameter at the contact position with the second cam 183 changes. The varying length of the connecting rod 185 extending outside the cylindrical cavity 182a can be used to compensate for the change in distance between the first transmission shaft 165 and the support bending plate 161 caused by the rotation of the first cam 163.

[0087] 3. Because the second cam 183 and the first cam 163 are the same in size, shape and installation angle on the first drive shaft 165, this will ensure that the extension and retraction length of the connecting rod 185 is basically equal to the change in distance between the first drive shaft 165 and the support plate 161. This not only solves the technical problem that the other side of the support plate cannot be structurally fixed, but also ensures that the support plate can rotate and change with the wheel diameter of the first cam.

[0088] 4. At the same time, since the connecting rod 185 is connected to the cylindrical cavity 182a by the spring 186, it not only facilitates the extension and retraction of the connecting rod 185 within the cylindrical cavity 182a, but also plays a certain role in vibration reduction.

[0089] Example 2

[0090] A log feeder 200 is installed on one side of the veneer lathe 100; the log feeder 200 is positioned near the double-row roller unit. The log feeder 200 installed on one side of the veneer lathe 100 enables automatic batch feeding of logs.

[0091] In this embodiment, the log feeding machine 200 includes: a log temporary storage rack 210, a log feeding seat 220, a log feeding unit, a baffle bar 270, and a log rolling plate 280;

[0092] The top of the log storage rack 210 is provided with a storage ramp 211; the log loading seat 220 is set near the log storage rack 210 and is located at the lower end of the storage ramp 211.

[0093] The log feeding unit includes a second drive shaft 240, a material support plate 230, a material limiting upright plate 231, a material support block 250, a cylinder 260, and a third motor 290;

[0094] The log loading base 220 is provided with a storage chamber, and the cylinder 260 is fixed in the storage chamber of the log loading base 220; the cylinder 260 includes two cylinders, and the drive rods of the two cylinders 260 pass through the top working surface of the log loading base 220 upwards.

[0095] The material support plate 230 is set on the top working surface of the log loading base 220, and the bottom surface of the material support plate 230 is fixedly connected to the drive rods of the two cylinders 260.

[0096] On the top working surface of the log loading base 220, there is a vertical plate 221 on each side of the support plate 230. The vertical plate 221 is provided with a vertical sliding channel 222, and a slider 223 is slidably connected in the sliding channel 222.

[0097] An arc-shaped groove is provided on the top surface of the material support plate 230 along the length direction of the material support plate 230. The second drive shaft 240 is rotatably connected in the arc-shaped groove and both ends of the second drive shaft 240 are rotatably connected to the slider 223 respectively.

[0098] Specifically, in order to further ensure the stability of the rotational connection between the second drive shaft 240 and the arc groove, a bearing can be welded to each side of the material support plate 230, and the two ends of the second drive shaft 240 are connected to the bearings;

[0099] The third motor 290 is fixed on one of the sliders 223, and the main shaft of the third motor 290 is driven by the second transmission shaft 240.

[0100] The material support block 250 includes multiple blocks, which are fixed at intervals on the second drive shaft 240. A V-shaped groove 251 is provided on the top of each material support block 250. The material support plate 230 is provided with a clearance groove at a corresponding position below each material support block 250 to allow the material support block 250 to rotate. The clearance groove ensures that the material support block 250 can rotate freely without being obstructed.

[0101] The material limiting plate 231 is vertically fixed to one side of the material support plate 230 and is positioned close to the log storage rack 210; wherein, when the drive rod of the cylinder 260 is in the retracted state, the upper end of the material limiting plate 231 is lower than the lower end of the storage inclined plate 211.

[0102] The material stop bar 270 is fixed on the round log loading seat 220 and is located on the other side of the material support plate 230;

[0103] The log roller plate 280 is fixed on the log loading seat 220 by a support plate. The height of the log roller plate 280 is greater than the top of the stop bar 270. The lower end of the log roller plate 280 extends to the top of the double-row roller unit.

[0104] The specific working method of the log feeding machine 200 provided in this embodiment is as follows:

[0105] 1. Before loading, control the third motor 290 to drive the second transmission shaft 240 and the material support block 250 to rotate, causing one side of the material support block 250 to be lower than the lower end of the storage inclined plate 211. That is, at this time, the V-shaped grooves 251 on the material support block 250 are in an inclined state; see details for specific states. Figure 12 ;

[0106] 2. Place a batch of logs on the storage ramp 211 at the top of the log storage rack 210; the logs at the bottom of the storage ramp 211 will naturally roll into the V-groove 251 on the support block 250; the stop bar 270 will limit the position to prevent the logs from rolling off.

[0107] 3. Control the third motor 290 to work again, drive the second transmission shaft 240 and the material support block 250 to rotate, causing the V-shaped groove 251 on the material support block 250 to be vertically aligned, and stably load the log into the V-shaped groove 251 on the material support block 250.

[0108] 4. Control the extension of the drive rod of the cylinder 260 and drive the support plate 230 to rise until the height of the support plate 230 is higher than the height of the log rolling plate 280; at this time, the limiting plate 231 on one side of the support plate 230 rises synchronously with the support plate 230 and is limited to the bottom of the batch of logs to prevent the logs from rolling off the storage inclined plate 211.

[0109] 5. Then, control the third motor 290 to work again, drive the second transmission shaft 240 and the material support block 250 to rotate, causing the V-groove 251 on the material support block 250 to rotate toward the round log rolling plate 280. The round log in the V-groove 251 will naturally roll onto the round log rolling plate 280 and fall into the working space between the double-row roller unit and the single-row roller unit.

[0110] 6. Control the third motor 290 to work again, drive the second transmission shaft 240 and the material support block 250 to rotate in the opposite direction and reset; and control the cylinder 260 to retract the drive rod to reset the material support plate 230; the limiting plate 231 on one side of the material support plate 230 will descend synchronously with the material support plate 230 until the upper height of the limiting plate 231 is lower than the lower height of the storage inclined plate 211, and the log at the bottom of the storage inclined plate 211 will naturally roll into the V-groove 251 on the material support block 250;

[0111] 7. Repeat steps 3-6 again to feed all logs sequentially into the working space between the double-row roller unit and the single-row roller unit until all logs have been loaded.

[0112] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0113] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of components or the interaction between components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0114] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solutions and concepts of this invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A rotary cutting machine with adjustable slit size and drop; characterized in that, include: The machine base, double-row roller unit, single-row roller unit, linear drive unit, knife table, rotary cutter, cutter gap adjustment unit, and dynamic position stabilization unit; The blade holder is fixed on the machine base, and the rotary cutter is fixed on the blade holder; the double-row roller unit slides on the machine base and is located on the opposite side of the blade holder; The linear drive unit includes a first motor fixed on the base and a lead screw driven by the main shaft of the first motor; the lead screw is threadedly driven by the double-row roller unit. The cutter adjustment unit includes a support plate, a transmission bearing, a first cam, a first transmission shaft, a rotating shaft seat, and a second motor. The support bending plate includes two plates, which are hinged to both sides of the tool holder; a single row roller unit is fixed to the top of the two support bending plates; and a transmission bearing is rotatably connected to the side of the support bending plate away from the tool holder. The rotating shaft seat includes two rotating shaft seats, which are fixedly and spaced apart on the machine base. One rotating shaft seat is located below each transmission bearing. The first drive shaft is rotatably connected between two shaft seats; the second motor is mounted on the base and the main shaft of the second motor is driven by the first drive shaft. The first cam includes two cams, which are fixed at intervals on the first drive shaft; each first cam is located directly below a drive bearing, and the drive bearing on the same side is in rolling contact with the first cam. The dynamic position stabilization unit is connected between the first drive shaft and the support bend plate; the dynamic position stabilization unit can automatically adjust its length as the first cam rotates to compensate for the change in distance between the first drive shaft and the support bend plate caused by the rotation of the first cam. The dynamic position stabilization unit includes: a fixed shaft, a fixed bushing, and a linkage compensation module; The fixed bushings include two, which are respectively fixed to the support bend plate; the fixed shaft is fixed to the two fixed bushings. The linkage compensation module includes a long cylindrical body, a side conical body, a second cam, a bolt, a connecting rod, a spring, a short cylindrical body, and a rotating bushing; The long cylindrical body and the short cylindrical body are coaxially rotatably connected; the long cylindrical body and the short cylindrical body are coaxially provided with through shaft holes; the long cylindrical body and the short cylindrical body are rotatably connected to the first transmission shaft through the shaft holes; The short cylindrical body is provided with multiple radial holes, and bolts are inserted into the radial holes to lock the short cylindrical body onto the first drive shaft; The elongated cylindrical body has a cam movable cavity coaxial with the shaft hole. The second cam is disposed in the cam movable cavity and fixedly connected to the first drive shaft. The second cam is the same size and shape as the first cam. The side cone is fixed to the side wall of the long cylindrical body, and a cylindrical cavity is provided on the side cone along its length direction, which communicates with the cam movable cavity on the long cylindrical body; the cavity wall of the cylindrical cavity is provided with internal threads; The bolt thread is locked onto the internal thread of the cylindrical cavity; a through hole is provided on the bolt along its axial direction; the connecting rod is movably inserted into the through hole of the bolt; The lower end of the connecting rod has a hemispherical surface structure and its lower end is in sliding contact with the second cam; the upper end of the connecting rod is fixedly connected to a rotating bushing; the rotating bushing is rotatably connected to a fixed shaft; The spring is set in the cylindrical cavity and sleeved on the connecting rod; the lower end of the spring is fixedly connected to the connecting rod, and the upper end of the spring is fixedly connected to the tail of the bolt.

2. The rotary cutting machine with adjustable slit size and drop according to claim 1, characterized in that, The short cylindrical body is also provided with an annular groove coaxial with the shaft hole, and the diameter of the annular groove is larger than the diameter of the shaft hole; the end of the long cylindrical body is provided with an annular limiting plate that matches the size of the annular groove, and the annular limiting plate is rotatably connected in the annular groove.

3. The rotary cutting machine with adjustable slit size and drop according to claim 1, characterized in that, A log feeder is installed on one side of the rotary cutting machine; the log feeder is located near the double-row roller unit.

4. The rotary cutting machine with adjustable kerf size and drop according to claim 3, characterized in that, The log feeder includes: a log storage rack, a log feeding seat, a log feeding unit, a stop bar, and a log rolling plate; The top of the log storage rack is equipped with a storage ramp; the log loading seat is located near the log storage rack and at the lower end of the storage ramp. The log feeding unit includes a second drive shaft, a material support plate, a material limiting plate, a material support block, a cylinder, and a third motor; The log loading platform has a storage chamber, and the cylinder is fixed in the storage chamber of the log loading platform; the cylinder includes two cylinders, and the drive rods of the two cylinders pass upward through the top working surface of the log loading platform; The material support plate is set on the top working surface of the log loading seat, and the bottom surface of the material support plate is fixedly connected to the drive rods of the two cylinders. On the top working surface of the log loading base, there is a vertical plate on each side of the support plate. The vertical plate has a vertically arranged sliding channel, and a slider is slidably connected in the sliding channel. An arc-shaped groove is provided on the top surface of the material support plate along the length of the material support plate. The second drive shaft is rotatably connected in the arc-shaped groove, and both ends of the second drive shaft are rotatably connected to the slider. The third motor is fixed on one of the sliders, and the main shaft of the third motor is driven by the second transmission shaft. The material support block includes multiple blocks, which are fixed at intervals on the second drive shaft; a V-shaped groove is provided on the top of the material support block; and a relief groove for the material support block to rotate is provided on the corresponding position below each material support block. The material limiting upright is vertically fixed to one side of the material support plate and is positioned close to the log storage rack; wherein, when the cylinder drive rod is in the retracted state, the upper end of the material limiting upright is lower than the lower end of the storage inclined plate. The material stop bar is fixed on the round log loading seat and located on the other side of the material support plate; The log rolling plate is fixed to the log feeding seat by a support plate. The height of the log rolling plate is greater than the top of the stop bar. The lower end of the log rolling plate extends to the top of the double-row roller unit.

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