A rotary cutting machine pressure bar follow-up control device

Abstract

The utility model relates to a kind of rotary cutting machine pressure ruler follow-up control device, the rotary cutting machine includes base and is equipped with the pressure ruler beam of pressure ruler;The upper side of the rear portion both sides of base is equipped with beam body support seat, and the lower side of pressure ruler beam both ends is connected with connecting seat, and the rear portion of connecting seat is hinged on beam body support seat;Still include to control the electric fine adjustment device of the up-and-down floating of pressure ruler beam to adjust the height difference of pressure ruler blade edge and rotary cutting knife blade height difference.This utility model rotary cutting machine pressure ruler follow-up control device novel structure, reasonable in design, convenient and practical, for pressure ruler has increased height follow-up adjustment function, it is favorable to adjust the height difference of pressure ruler blade edge and rotary cutting knife blade in different wood diameter stage in processing process, solve the problem of veneer reverse winding and positive winding, it is favorable to improve veneer board type.

Description

Technical Field

[0001] This utility model relates to the field of veneer anti-rolling veneer cutting control method and control device for veneer cutting machine. Background Technology

[0002] Traditional veneer laminating machines, when used on small-diameter wood, often produce veneers with a positive curl due to the downward curling stress of the wood itself. Figure 1 As shown.

[0003] Chinese patent CN114670303B discloses a thickness-fixing structure and working method for a spindleless veneer lathe. It utilizes rows of pressure strips to hold the wood in place, enhancing the thickness-fixing function and controlling the board thickness within a standard precision range. This ensures stable and uniform veneer cutting, guaranteeing veneer quality while eliminating stringiness and waviness, resulting in a smooth surface and further improving veneer precision and quality. Furthermore, the pressure of the pressure strips helps to mitigate positive curling.

[0004] In actual rotary cutting, because the height of the pressure strip is fixed at different times (keeping the pressure strip edge flush with the rotary cutter blade), veneer may curl backwards when the wood diameter is large (generally above 250mm), making subsequent veneer collection more difficult. The reason is that when the pressure strip edge and the rotary cutter blade are aligned, the combined inner and outer pressure of the pressure strip and the rotary cutter results in excessive scraping force on the wood surface. This causes upward curling stress in the wood after rotary cutting, similar to paper curling up after being scraped with a scraper. Figure 2 As shown. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a reasonably designed and convenient veneer strip follow-up control device, which adds a height follow-up adjustment function to the strip, which is beneficial to improving the shape of the veneer.

[0006] This utility model is achieved by the following solution: a control device for the follow-up movement of the pressure strip of a veneer cutting machine, wherein the veneer cutting machine includes a machine base and a pressure beam with a pressure strip; characterized in that: a beam support seat is provided on the upper sides of both rear parts of the machine base, and a connecting seat is connected to the lower side of both ends of the pressure beam, the rear part of the connecting seat is hinged to the beam support seat; it also includes an electric fine-tuning device for controlling the up and down floating of the pressure beam to adjust the height difference between the pressure strip blade and the veneer cutting blade.

[0007] Furthermore, the electric fine-tuning device includes an adjusting screw that runs vertically through the front of the connecting seat and is threaded into the connecting seat. The adjusting screw is driven by an adjusting motor, and the lower end of the adjusting screw abuts against the beam support seat.

[0008] Furthermore, a steel ball is embedded in the lower end of the adjusting screw, and a support bolt is connected to the upper front part of the beam support seat, with the upper end of the support bolt abutting against the steel ball.

[0009] Furthermore, the upper end of the adjusting screw is coaxially connected to the main shaft of the adjusting motor via a sleeve, the upper end of the sleeve is tightly fitted to the main shaft of the adjusting motor, and the lower end of the sleeve is connected to the upper end of the adjusting screw via a key, allowing the adjusting screw to slide axially relative to the sleeve.

[0010] Furthermore, the electric fine-tuning device includes a cam rotatably mounted on the beam support and driven to rotate by an adjusting motor, with the bottom of the connecting seat abutting against the upper side of the cam.

[0011] Furthermore, one end of the measuring beam is provided with a lifting hydraulic cylinder for controlling the lifting of the measuring beam. One end of the lifting hydraulic cylinder is hinged to the connecting seat, and the other end is hinged to the beam support seat.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention has a novel structure, reasonable design, and is convenient and practical. It adds a height adjustment function to the pressure strip, which is beneficial to adjust the height difference between the pressure strip blade and the rotary cutter blade at different wood diameter stages during the processing, thereby solving the problems of veneer roll-back and roll-forward, and improving the veneer shape.

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through specific embodiments and related drawings. Attached Figure Description

[0014] Figure 1 This is a diagram illustrating the principle behind the positive curling phenomenon that occurs when a traditional veneer lathe cuts small-diameter wood.

[0015] Figure 2 This is a schematic diagram illustrating the principle of the curling phenomenon that occurs when a veneer lathe is used to cut large-diameter wood.

[0016] Figure 3 This is a partial perspective view of a rotary cutting machine with a control device according to an embodiment of the present invention;

[0017] Figure 4 yes Figure 3 Side view;

[0018] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0019] Figure 6 This is a cross-sectional view of the sleeve connection according to an embodiment of the present utility model;

[0020] Figure 7This is a schematic diagram illustrating the principle of rotary cutting large-diameter wood according to an embodiment of this utility model;

[0021] Figure 8 yes Figure 2 Enlarged view of a portion of the image;

[0022] Figure 9 This is a schematic diagram illustrating the principle of rotary cutting small-diameter wood according to an embodiment of this utility model;

[0023] The following are the labels in the diagram: 100-machine base, 110-beam support seat, 111-support bolt, 200-single roller, 300-rotary cutting blade, 400-lifting hydraulic cylinder, 500-pressure gauge beam, 510-connecting seat, 600-electric fine-tuning device, 610-adjusting screw, 611-steel ball, 620-adjusting motor, 630-sleeve. Detailed Implementation

[0024] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Example 1: As Figures 3-6 As shown, a control device for the follow-up movement of the pressure strip of a veneer lathe is disclosed. The veneer lathe includes a base 100 and a pressure strip beam 500. Beam support seats 110 are provided on the upper sides of both rear sides of the base. Connecting seats 510 are connected to the lower sides of both ends of the pressure strip beam, and the rear of the connecting seats 510 is hinged to the beam support seats 110. The device also includes an electric fine-tuning device 600 for controlling the up-and-down movement of the pressure strip beam to adjust the height difference between the pressure strip blade and the veneer lathe blade. The electric fine-tuning device 600 finely adjusts the height position of the pressure strip beam to achieve adjustment of the height difference between the pressure strip blade and the veneer lathe blade within a range of 0-10mm.

[0027] Because small-diameter wood veneers naturally exhibit downward curling stress after rotary cutting, with smaller diameters resulting in greater stress, this invention utilizes this characteristic by incorporating an adjustable control device that controls the height difference between the pressure gauge blade and the rotary cutting blade. When the wood diameter is large, raising the pressure gauge blade height offsets its position from the rotary cutting blade in the vertical direction. This staggers the pressure gauge's scraping action on the wood surface from the cutting action of the rotary cutting blade, reducing the scraping force on the wood surface. The wood then forms a transition arc below the pressure gauge blade at the cutting position, reducing upward curling stress after rotary cutting and preventing the veneer from curling backward. Figure 7 , 8 As shown; however, when the wood diameter is small, the cutting edge of the pressure strip is flush with the blade of the rotary cutter. This increases the scraping force of the pressure strip on the wood surface, using the upward curling stress to counteract the downward curling stress after rotary cutting of small-diameter wood, thus preventing positive curling of the veneer. Figure 9 As shown.

[0028] This utility model relates to a rotary veneer press bar follow-up control device, which adds a height follow-up adjustment function to the press bar. This allows the press bar height to be raised when the wood diameter is large to reduce the scraping force on the wood surface; and the press bar height to be lowered when the wood diameter is small to balance the downward rolling stress of small-diameter wood. By adjusting the height difference between the press bar blade and the rotary veneer blade at different wood diameter stages, it helps to solve the problems of veneer back-rolling and forward-rolling, improves the veneer shape, and facilitates subsequent board collection operations.

[0029] In fact, the veneer laminating machine also includes a single-roller beam with a single roller 200, a veneer blade 300, a double-roller beam with two rollers that can move back and forth relative to the machine base, and a pressure gauge beam 500 located above the single-roller beam. The machine base 100, the single-roller beam with the single roller 200, the veneer blade 300, the double-roller beam with two rollers, the beam support 110, the pressure gauge beam 500, the pressure gauge strip, and the connecting seat 510 of the aforementioned veneer laminating machine are all existing technologies and are not within the scope of improvement of this control device. Therefore, their structure and principle will not be described in detail here.

[0030] In this embodiment, the electric fine-tuning device 600 includes an adjusting screw 610 (or a ball screw) that runs vertically through the front of the connecting seat and is threaded into the connecting seat. The adjusting screw is driven by an adjusting motor, and the lower end of the adjusting screw abuts against the beam support seat. The adjusting motor is a geared motor. The connecting seat has a threaded hole that mates with the adjusting screw 610 or a threaded sleeve that mates with the adjusting screw 610. The lower end of the adjusting screw abuts against the beam support seat. Depending on the position of the lower end of the adjusting screw, the pressure gauge beam can be raised or lowered slightly when the adjusting screw rotates.

[0031] In this embodiment, a steel ball 611 is embedded in the lower end of the adjusting screw, and a support bolt 111 is connected to the upper front part of the beam support seat. The upper end of the support bolt abuts against the steel ball, and there is point contact between the steel ball 611 and the support bolt, which can improve the adjustment accuracy. The support bolt can also be used to manually adjust the height of the gauge beam. A threaded hole for connecting the support bolt 111 is provided on the upper front part of the beam support seat. A locking nut is connected to the support bolt 111 and locks it on the upper side of the beam support seat to prevent the support bolt 111 from loosening.

[0032] In this embodiment, the upper end of the adjusting screw is coaxially connected to the main shaft of the adjusting motor via a sleeve 630. The upper end of the sleeve is tightly fitted to the main shaft of the adjusting motor. The lower end of the sleeve is connected to the upper end of the adjusting screw via a key, and the adjusting screw can slide axially relative to the sleeve. The upper end of the adjusting screw is symmetrically provided with a pair of keyways for placing the transmission key. The lower end of the sleeve is symmetrically provided with a pair of sliding grooves that slide with the transmission key. The length direction of the sliding grooves is parallel to the axial direction of the sleeve.

[0033] In this embodiment, a lifting hydraulic cylinder 400 is provided at one end of the gauge beam to control its lifting. One end of the lifting hydraulic cylinder is hinged to the connecting seat, and the other end is hinged to the beam support seat. The lifting hydraulic cylinder 400 can lift the first side of the connecting seat. Thus, during the processing, if minor debris blockage occurs between the gauge strip and other components, the connecting seat and gauge beam can be quickly lifted over a short distance, and the debris blockage will be carried out by the rotating shaft or gear plate, thereby solving the blockage problem. When maintenance is required or in case of severe debris blockage, the connecting seat and gauge beam can be lifted after stopping the machine, thus facilitating equipment maintenance.

[0034] The pressure bar follow-up control device of the veneer lathe can be controlled in the following ways during the veneer lathe process: (1) Set two diameter settings D for the wood, one large and one small. 大 D 小 Set the maximum height difference H between the cutting edge of the pressure gauge strip and the cutting edge of the rotary cutter. max (2) Calculate the diameter D of the rotary-cut wood; (3) Perform rotary-cutting on the wood using a rotary-cutting machine; (4) When D > D 大 At that time, the wood was rotary-cut from diameter D to diameter D 大 During the process, the height difference between the cutting edge of the pressure strip and the cutting edge of the rotary cutter is always maintained at H. max (5) When D 小 <D≤D 大 At that time, the wood was rotary-cut from diameter D to diameter D 小 During the process, the height difference between the cutting edge of the pressure gauge and the cutting edge of the rotary cutter gradually decreases from the set value H to 0 (i.e., the cutting edge of the pressure gauge and the cutting edge of the rotary cutter are flush), where H≤H max When the diameter of the wood D=D 大When, H=H max (6) When D≤D 小 During the process, from the moment the wood is rotary-cut from diameter D to the end of the process, the height difference between the cutting edge of the pressure strip and the cutting edge of the rotary cutter remains at 0 (i.e., the cutting edge of the pressure strip and the cutting edge of the rotary cutter are flush).

[0035] H and H max D, D 大 D 小 Satisfying the relation: H=H max (DD) 小 ) / (D 大 -D 小 D 大 250~400mm, D 小 60~100mm, H max 5~8mm; D 大 D 小 H max The specific settings can be rotated according to actual processing needs. Generally, the thicker the single board, the greater the D value. 小 D 大 The larger it is; D 大 The larger H is max The larger it gets, the bigger it becomes.

[0036] The calculation method for the diameter D of the rotary-cut wood in step (2) is a function that is built into the existing rotary-cutting machine. Specifically, D = 2(h² + L² - r²) / (2r + 2L), where r is the radius of the double rollers of the rotary-cutting machine, h is the center distance between the double rollers / 2, and L is the horizontal distance between the center of the double rollers and the rotary-cutting blade.

[0037] Example 2: The difference between this example and Example 1 lies in the construction of the electric fine-tuning device. In this example, the electric fine-tuning device includes a cam rotatably mounted on the beam support and driven to rotate by an adjusting motor. The adjusting motor is a geared motor, and the main shaft of the geared motor is coaxially connected to the wheel axle of the cam. The bottom of the connecting seat abuts against the upper side of the cam. The rotation of the cam can drive the pressure beam to rise or fall slightly.

[0038] Example 3: The difference between this example and Example 1 lies in the construction of the fine-tuning device. In this example, the fine-tuning device uses a servo hydraulic cylinder (also called a digital hydraulic cylinder). The servo hydraulic cylinder is mounted on the connecting seat, and the end of the telescopic rod of the servo hydraulic cylinder abuts against the beam support seat.

[0039] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely a range of numerical values ​​among many implementable values ​​that have a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of this invention. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0040] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured by integral molding using a casting process) (except where it is obviously impossible to use an integral molding process).

[0041] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0042] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A peeler presser bar follower control device for a peeler, the peeler comprising a frame and a presser bar provided with a presser bar, characterized in that: The machine base is provided with beam support seats on both sides above the rear part, and connecting seats are connected to the lower sides of both ends of the pressure gauge beam. The rear part of the connecting seats is hinged to the beam support seats; it also includes an electric fine adjustment device for controlling the up and down floating of the pressure gauge beam to adjust the height difference between the pressure gauge blade and the rotary cutting blade.

2. The log band saw mill gage bar follow-up control of claim 1 wherein: The electric fine-tuning device includes an adjusting screw that runs vertically through the front of the connecting seat and is threaded into the connecting seat. The adjusting screw is driven by an adjusting motor, and the lower end of the adjusting screw abuts against the beam support seat.

3. The rotary cutting machine pressure strip follow-up control device according to claim 2, characterized in that: The lower end of the adjusting screw is embedded with a steel ball, and a support bolt is connected to the upper front part of the beam support seat, with the upper end of the support bolt abutting against the steel ball.

4. The rotary cutting machine pressure strip follow-up control device according to claim 2, characterized in that: The upper end of the adjusting screw is coaxially connected to the main shaft of the adjusting motor via a sleeve. The upper end of the sleeve is tightly fitted to the main shaft of the adjusting motor. The lower end of the sleeve is connected to the upper end of the adjusting screw via a key, and the adjusting screw can slide axially relative to the sleeve.

5. The rotary cutting machine pressure strip follow-up control device according to claim 1, characterized in that: The electric fine-tuning device includes a cam that is rotatably mounted on the beam support and driven to rotate by an adjusting motor, with the bottom of the connecting seat abutting against the upper side of the cam.

6. The rotary cutting machine pressure strip follow-up control device according to claim 1, characterized in that: One end of the measuring beam is equipped with a lifting hydraulic cylinder for controlling the lifting of the measuring beam. One end of the lifting hydraulic cylinder is hinged to the connecting seat, and the other end is hinged to the beam support seat.

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