Damping arbor for wood shaper-milling machines

Abstract

The utility model discloses a woodworking planer-milling machine damping cutter shaft, including cutter shaft stem, the stem body of cutter shaft radially is inlayed with radial damping spring and spring top cover, and this spring top cover is located radial damping spring's outer end side, the stem body shoulder end of cutter shaft stem is inlayed with axial damping spring along the axial direction, still is equipped with planer cutter gland in the outer end of cutter shaft stem. Cutter shaft stem is conical column axle, and the conical angle alpha of this conical column is 4-6. Planer cutter gland is provided with the taper hole for passing through cutter shaft stem, and the taper angle beta of this taper hole is greater than alpha. Cutter shaft stem has at least two cross sections and is inlayed with radial damping spring and spring top cover, and cutter shaft stem's same cross section is inlayed with four pairs of radial damping spring and spring top cover, and every radial damping spring has a spring top cover. The top surface of spring top cover is a conical surface. This woodworking planer-milling machine damping cutter shaft can effectively reduce planer-milling cutter shaft vibration, to improve the planing precision of wood.

Description

Technical Field

[0001] This utility model relates to woodworking milling machines in the field of wood processing technology, and more particularly to an improvement in the structure of the milling cutter shaft of a woodworking milling machine. Background Technology

[0002] A woodworking milling machine is a device used for milling and planing wood. The cutter shaft, which mounts the milling cutters, is its key component. Because wood is not a homogeneous material, knots, grain, and variations in hardness lead to changes in the planing force of the cutter. These differences in wood texture inevitably cause vibrations in the cutter shaft and the cutters during milling. This not only results in changes in the wood feed speed but also in fluctuations in feed speed, such as the wood block jerking. The jerking of the wood block can then obstruct the feed of subsequent blocks, causing them to bounce backward upon impact. All these phenomena create repeated planing on the wood surface, resulting in an uneven, pitted surface that affects both planing accuracy and efficiency. Furthermore, during planing, the planer makes sudden impact contact with the wood across its entire width, causing continuous impact milling with multiple pieces of wood. The higher the feed rate, the higher the impact frequency, resulting in chipping at the wood head, which reduces planing accuracy and flatness. It also hinders tool life and chip removal, making vibration unavoidable. High-speed planing makes the tool more prone to cracking and chipping, reducing tool durability. Utility Model Content

[0003] In view of the above-mentioned differences in the existing technology, the technical problem to be solved by this utility model is to provide a vibration damping cutter shaft for woodworking milling machines that can effectively reduce the vibration of the milling cutter shaft and improve the milling accuracy.

[0004] To solve the above-mentioned technical problems, the present invention provides a woodworking milling machine vibration damping cutter shaft, including a cutter shaft rod. A radial damping spring and a spring top cover are radially embedded in the shaft body of the cutter shaft rod, and the spring top cover is located on the outer end side of the radial damping spring. An axial damping spring is axially embedded in the shoulder end of the shaft body. A planer blade pressure cover is also fitted on the outer end of the cutter shaft rod.

[0005] In the above technical solution, the use of damping spring structures in both the radial and axial directions of the cutter shaft not only reduces the radial vibration of the planer cutter but also its axial vibration. This damping structure effectively reduces the adverse effects of planer shaft vibration on planing operations, preventing planing vibration from affecting planing accuracy and meeting the requirements of high-speed, high-precision wood planing. This damping structure also helps reduce the wear rate of the planer cutter, extending its service life and accuracy, and ensuring its long-term stable operation.

[0006] In a preferred embodiment of this invention, the cutter shaft is a conical column shaft with a cone angle α of 4°–6°. The conical surface fit ensures the coaxiality of the cutter and the spindle, achieving precise positioning of the cutter and the shaft. It also helps the planer resist vibration and maintain machining accuracy during high-speed planing.

[0007] In a preferred embodiment of this invention, the planer cover is provided with a tapered hole for the planer shaft to pass through, wherein the tapered angle β > α of the tapered hole. This effectively clamps and locks planers of different widths on the planer shaft.

[0008] In a preferred embodiment of this invention, radial damping springs and spring caps are embedded in at least two cross sections of the cutter shaft; four pairs of radial damping springs and spring caps are embedded in the same cross section of the cutter shaft, with each radial damping spring corresponding to one spring cap. The top surface of the spring cap is a conical surface. This effectively improves the vibration damping effect of the cutter shaft and the planer blade.

[0009] In a preferred embodiment of this invention, both the radial damping spring and the axial damping spring are disc springs. Disc springs offer high stiffness, strong damping and vibration absorption capabilities, and high space utilization. Attached Figure Description

[0010] The vibration damping cutter shaft of the woodworking milling machine of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is a structural view of a specific embodiment of the shock-absorbing cutter shaft of a woodworking planer and milling machine according to this utility model;

[0012] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of the cutter shaft rod in the structure shown;

[0013] Figure 3 yes Figure 2 Enlarged view of section A-A;

[0014] Figure 4 yes Figure 3 Front view of the spring-loaded top cover;

[0015] Figure 5 yes Figure 3 View from direction A;

[0016] Figure 6 yes Figure 2 Cross-sectional view of the middle planer blade cap.

[0017] In the figure, 1—cutter shaft rod, 2—cutter shaft support seat, 3—cutter shaft drive speed change motor, 4—spring top cover, 5—radial damping spring, 6—spring pressure cover, 7—axial damping spring, 8—planer blade pressure cover, 9—pressure cover bolt. Detailed Implementation

[0018] like Figure 1 , Figure 2 and Figure 3 The woodworking planer / milling machine shown has a vibration-damping cutter shaft. This shaft includes a cutter shaft rod 1, which is rotatably supported on a cutter shaft support 2 for mounting the planer / milling cutter. The cutter shaft support 2 is fixedly mounted on the housing of a cutter shaft variable speed motor 3. The cutter shaft rod 1 is connected to the output shaft of the cutter shaft variable speed motor 3 via a coupling. The cutter shaft variable speed motor 3 is a commonly used variable speed motor in woodworking planer / milling machines. Alternatively, the cutter shaft rod 1 can also be connected to the output shaft of the cutter shaft variable speed motor 3 via a belt drive.

[0019] The cutter shaft 1 includes a mandrel section for mounting a milling cutter. This mandrel section has a conical cylindrical structure with a cone angle α = 4°, preferably α = 3°–5°. A cutter cap 8 is fitted onto the front end of the mandrel section, and cap bolts 9 press the cutter cap 8 against the mandrel section for mounting the cutter. Twelve radial damping springs 5 ​​are radially embedded in the mandrel section. These twelve radial damping springs 5 ​​are located on three sections of the mandrel section of the cutter shaft 1. Each section has four spring mounting holes at its two mutually perpendicular diameter ends. Each spring mounting hole contains one radial damping spring 5. A spring top cap 4 is installed at the outer end of each radial damping spring 5, forming a pairwise opposing damping structure. The rear end of the spindle section of the cutter shaft 1 is a platform stage. An annular spring mounting hole is axially provided at the shoulder end of this platform stage, which is used for cutting tool positioning. An axial damping spring 7 is embedded in the annular spring mounting hole. A spring cap 6, which is a circular washer with a central hole, is placed on the outer end of the axial damping spring 7. Both the radial damping spring 5 and the axial damping spring 7 are composed of stacked disc springs.

[0020] like Figure 4 , Figure 5 As shown, the spring top cover 4 includes a guide rod part at the lower end and a top cover part. The guide rod part is inserted into the core hole of the disc spring. The top cover part is round and the top surface of the top cover part is a conical surface. The cone angle of the conical column where the conical surface is located is the same as the cone angle of the core shaft section of the cutter shaft rod 1.

[0021] like Figure 6 As shown, a conical hole is provided at the center of the planer cover 8, and the cone angle β of the conical hole is greater than the cone angle α of the mandrel section. This allows the position of the planer cover 8 on the cutter shaft 1 to be changed, thereby adapting to the installation needs of different planer and milling cutter lengths.

[0022] The above are some preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make improvements and substitutions to the technical solutions described in the foregoing embodiments. Such substitutions and improvements that violate the spirit and principles of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A vibration damping cutter shaft for a woodworking planer and milling machine, comprising a cutter shaft rod (1), characterized in that: The cutter shaft rod (1) is radially fitted with a radial damping spring (5) and a spring top cover (4), the spring top cover (4) being located on the outer end side of the radial damping spring (5); the shoulder end of the cutter shaft rod (1) is axially fitted with an axial damping spring (7); a planer blade pressure cover (8) is also fitted on the outer end of the cutter shaft rod (1).

2. The woodworking milling machine vibration damping cutter shaft according to claim 1, characterized in that: The cutter shaft (1) is a conical shaft with a cone angle α = 4°–6°.

3. The vibration damping cutter shaft of the woodworking planer and milling machine according to claim 2, characterized in that: The planer cap (8) is provided with a tapered hole for the cutter shaft rod (1) to pass through, and the tapered angle of the tapered hole is β > α.

4. The woodworking milling machine vibration damping cutter shaft according to claim 1, 2 or 3, characterized in that: The cutter shaft (1) has radial damping springs (5) and spring caps (4) embedded in at least two cross sections; four pairs of radial damping springs (5) and spring caps (4) are embedded in the same cross section of the cutter shaft (1), and each radial damping spring (5) corresponds to a spring cap (4).

5. The vibration damping cutter shaft of the woodworking planer and milling machine according to claim 1, characterized in that: The top surface of the spring top cover (4) is a conical surface.

6. The vibration damping cutter shaft of the woodworking planer and milling machine according to claim 1, characterized in that: Both the radial damping spring (5) and the axial damping spring (7) are disc springs.

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