RU2328371C1 - Rotary wood-cutting attachment - Google Patents

Abstract

FIELD: woodworking.

SUBSTANCE: invention can be used in processing the plain surfaces of the wood materials. The attachment contains the body with the input spindle installed in it by means of the rolling bearings, the orbital transmission and cutting tools. The cogwheel is affixed to the body by use of the rotation bearings and kinetically connected with the cutting rate modifying device. The input spindle is fixedly connected with the orbital transmission carrier, and the cutting tools are made as the cylinder-shaped screw milling cutters and installed on the planetary pinions which are set on the rolling bearings of the carrier and engaged into the cogwheel with ability of traveling along it.

EFFECT: design of cutting attachment is simplified; accuracy and finish of wood materials are increased.

4 dwg

Description

The invention relates to the woodworking industry and can be used in milling, planing and other wood-cutting machines for processing flat surfaces of wood materials.

A well-known wood-cutting tool for processing flat surfaces of wood materials (SU No. 793765, MKI B27G 13/00, publ. 08/07/1981), (SU No. 990515, MKI B27G 13/00, publ. 01/23/1983), (SU No. 1240586 A1 , MKI B27G 13/00, publ. 06/30/1986), (RU No. 2024366 C1, MKI B23C 5/06, publ. 12/15/1994), comprising a housing, a shaft, a device for mounting a cutting tool on a shaft, a cutting tool.

A disadvantage of the known structures is the impossibility of high-quality processing of wood materials due to the large vibration of the cutting tool during operation.

A device is known (SU No. 1240586 A1, MKI B27G 13/00, publ. 06/30/1986), consisting of a housing, nozzles, disk cutters, stoppers, output shafts, a bevel wheel and satellites, a bevel gear, telescopic connection and telescopic shafts.

A disadvantage of the known design is that when it rotates, a runout occurs in the bearings of the output shaft due to the impressive masses: the body, telescopic joints, telescopic shafts and bevel gears, as well as the impossibility of perfect installation of each cutting tool in height.

The invention solves the problem of improving the accuracy and quality of the processed surface of wood materials and simplifying the design.

The technical result consists in improving the quality of the machined surface due to: reducing the rotating masses of the rotary wood-cutting head, the location of all its elements on one rigid structure, finding the axis of rotation of the screw cutters on the same horizontal plane and all manufacturing inaccuracies of the whole structure are easily corrected when sharpening the cutting tool.

The specified technical result is achieved in that in a rotary wood-cutting head containing a housing in which an input shaft, a planetary gear and cutting tools are mounted by means of rolling bearings, according to the invention, a gear wheel is mounted on the housing, which is fixed to the housing rigidly or by rotation bearings and with this is kinematically connected with the device for changing the cutting speed, and the input shaft is rigidly connected to the planet carrier of the planetary gear, and the cutting tools are made in the form of cylines -empirical screw cutters and mounted on the satellites of the planetary gear, which are planted on roller bearings and carrier are in engagement with a toothed wheel with the possibility of movement on it.

The technical result is achieved by changing the design of the bearing housing and the cutting tool drive.

Figure 1 shows a rotary wood-cutting head; figure 2 is a schematic diagram of a combined circuit of a rotary wood-cutting head; figure 3 - rotary wood-cutting head with a removed device for changing the cutting speed; figure 4 is a schematic diagram of the kinematic principle of a rotary wood-cutting head with a removed device for changing the cutting speed.

The rotary wood-cutting head consists of a housing 1, a tin protection 2 of a planetary gear, a cutting tool 3, which is a cylindrical helical mill, in which the lateral outer cutting part has the geometry of the passage cutter. The input shaft 4 has a rigid connection with the carrier 5. A gear 6 is mounted on the bearings 6. The satellites 7 are mounted on the bearings of the carrier 5 and are made to rotate and move along the gear 6. On the satellites 7 the cutting tool 3 is fixedly mounted. the gear wheel 6 is fixed to the gear wheel 8. The gear wheels 6 and 8 comprise a gear block mounted on rotation bearings on the housing 1. Wheel 9 is mounted on the shaft of an adjustable hydraulic motor 10 of type 313.16 or 303.112 and is used to rotate bchatogo wheel 8. Connected to the hydraulic motor 10 associated with the rotary die body 1 by means of mounting plate 11, brackets 12 and mounting bolts 13.

The cutting speed changing device includes a gear wheel 8, a gear wheel 9, and a hydraulic motor 10. The rotary wood-cutting head can work with a cutting speed changing device mounted on the housing 1, and can work with a removed cutting speed changing device.

Rotary wood-cutting head works as follows.

The rotary wood-cutting head has four operating modes:

- the motor shaft does not rotate;

- rotation of the shaft of the hydraulic motor 10 from the side of the gear 9 clockwise;

- rotation of the shaft of the hydraulic motor 10 from the side of the gear 9 counterclockwise;

- with the removed gears 9 and 8, the hydraulic motor 10, the mounting plate 11, the bracket 12 and the mounting bolts 13.

In the mode when the shaft of the hydraulic motor 10 does not rotate, and the gears 9 and 8 do not rotate. The rotation from the electric motor or the spindle of the machine is transmitted to the input shaft 4, which rotates the carrier 5. Satellites 7 are installed on the carrier 5. Being in gear with the gear wheel 6 , satellites 7 begin to spin. Mounted stationary on the satellites 7, the cutting tool 3 begins to rotate and moves around the circumference. The working fluid to the hydraulic motor 10 is not supplied.

The second mode, when the shaft of the hydraulic motor 10 rotates clockwise. The rotation from the electric motor or the machine spindle is transmitted to the input shaft 4, which rotates the carrier 5, with the satellites 7 installed on it. Being in mesh with the gear wheel 6, the satellites 7 begin to rotate. Mounted stationary on the satellites 7, the cutting tool 3 begins to rotate and moves around the circumference. Simultaneously with the start of rotation of the input shaft 4, a hydraulic fluid is supplied to the hydraulic motor 10 through a hydraulic system under pressure. The rotation from the gear motor 9 fixed to the shaft of the hydraulic motor 10 is transmitted to the gear 8. In this case, the gear unit 8 and 6 rotates in the same direction as the carrier 5. The cutting speed decreased compared to the first mode, but the angular speed of the carrier 5 remained unchanged.

The third mode, when the shaft of the hydraulic motor 10 rotates counterclockwise. Rotation from the electric motor or the machine spindle is transmitted to the input shaft 4, which rotates the carrier 5, with the satellites 7 installed on it. Being in mesh with the gear wheel 6, the satellites 7 begin to rotate. Mounted stationary on the satellites 7, the cutting tool 3 begins to rotate and moves around the circumference. Simultaneously with the start of rotation of the input shaft 4, a hydraulic fluid is supplied to the hydraulic motor 10 through a hydraulic system under pressure, changing the direction of flow. The rotation from the gear wheel 9, which is fixedly mounted on the shaft of the hydraulic motor 10, is transmitted to the gear wheel 8. In this case, the block of gears 8 and 6 rotates in the direction opposite to the direction of rotation of the carrier 5. The cutting speed increased in comparison with the first mode, but the angular speed of the carrier 5 remained unchanged.

In the fourth mode, the gears 9 and 8 are removed and the hydraulic motor 10 is removed along with the mounting plate 11, the bracket 12 and the fixing bolts 13. The rotation from the electric motor or the machine spindle is transmitted to the input shaft 4, which rotates the carrier 5 with the satellites 7 installed on it. in meshing with the gear 6, the satellites 7 begin to rotate. Mounted on the satellites 7, the cutting tool 3 begins to rotate and moves around the circumference. In this mode of operation, the gear 6 is fixedly attached to the housing 1.

The first three operating modes of the rotary wood-cutting head are used on surface processing lines of any wood material. The fourth mode is applied on the lines for surface treatment of wood material processed at the same cutting speed.

Claims (1)

A rotary wood-cutting head comprising a housing in which an input shaft, a planetary gear and cutting tools are mounted by means of rolling bearings, characterized in that a gear is mounted on the housing, which is fixedly attached to the housing by rotation bearings and is kinematically connected with the change device cutting speeds, and the input shaft is rigidly connected with the planet carrier of the planetary gear, and cutting tools are made in the form of cylindrical helical mills and mounted on satellite gears non-sized gears, which are mounted on the roller bearings of the carrier and are meshed with a gear wheel with the possibility of movement along it.

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