Pre-milling cutter with hydraulic device

Abstract

The utility model discloses a pre-milling cutter with a hydraulic device, which comprises a pre-milling cutter unit and an expansion unit, the pre-milling cutter unit comprises a cutter body, the cutter body is disc-shaped or cylindrical, a plurality of cutter teeth are arranged on the outer circle of the cutter body, a shaft sleeve hole is arranged in the center of the cutter body, the expansion unit comprises a hydraulic shaft sleeve, the hydraulic shaft sleeve is arranged in the shaft sleeve hole, and the hydraulic shaft sleeve is arranged in the shaft sleeve hole. A motor shaft hole is formed in the center of the hydraulic shaft sleeve, an expansion oil cavity and a pressurization channel are arranged in the hydraulic shaft sleeve, the expansion oil cavity is close to and surrounds the periphery of the motor shaft hole, hydraulic oil is filled in the expansion oil cavity, a screw hole is formed in the side face of the hydraulic shaft sleeve, a pressurization screw is screwed into the screw hole, and the bottom of the screw hole is communicated with the expansion oil cavity through the pressurization channel. When the pre-milling cutter is mounted on a station motor shaft, shaft hole matching zero clearance is achieved through hydraulic clamping, so that the assembly precision is improved, and high machining precision and long service life are achieved under the condition that the structure of the motor shaft is not changed.

Description

Technical Field

[0001] The utility model relates to plate edge banding equipment, in particular to a pre-milling cutter with a hydraulic device used for an edge banding machine. Background Art

[0002] The first step in edge banding is pre-milling. Pre-milling is to remove the excess edges of the board through the pre-milling cutter. Pre-milling can eliminate slight unevenness and cracks on the cut surface of the board, making the edge banding and the board bonded more firmly.

[0003] The pre-milling cutter is mounted on the workstation motor shaft, ensuring assembly through a hole-shaft clearance fit. The motor transmits torque via a threaded gland and keyed connection. This hole-shaft clearance fit can affect product accuracy and operational precision, thus affecting the machining results and product lifespan. Summary of the Invention

[0004] Purpose of the utility model: The purpose of the utility model is to provide a pre-milling cutter with a hydraulic device, which improves the assembly accuracy through hydraulic tightening during installation.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A pre-milling cutter with a hydraulic device includes a pre-milling cutter unit and a tightening unit. The pre-milling cutter unit includes a cutter body, which is disc-shaped or cylindrical. A plurality of cutter teeth are arranged on the outer circle of the cutter body, and a sleeve hole is arranged in the center of the cutter body. The tightening unit includes a hydraulic sleeve, which is arranged in the sleeve hole. A motor shaft hole is arranged in the center of the hydraulic sleeve. An expansion oil chamber and a pressurizing channel are arranged inside the hydraulic sleeve. The expansion oil chamber is close to and surrounds the motor shaft hole. The expansion oil chamber is filled with hydraulic oil. A screw hole is provided on the side of the hydraulic sleeve. A pressurizing screw is screwed into the screw hole. The bottom of the screw hole is connected to the expansion oil chamber through the pressurizing channel.

[0007] Furthermore, the hydraulic sleeve is fixed to the cutter body by means of assembly screws.

[0008] Furthermore, the outer circle of the hydraulic sleeve is provided with an annular positioning protrusion, the annular protrusion is provided with a screw hole, the sleeve hole of the cutter body is provided with an annular positioning groove adapted to the annular protrusion, and the annular positioning groove is provided with a threaded hole corresponding to the screw hole, and the assembly screw passes through the screw hole and is screwed into the threaded hole.

[0009] Furthermore, a keyway is provided on the inner wall of the motor shaft hole of the hydraulic sleeve.

[0010] Furthermore, the blade teeth are divided into several groups along the width direction of the blade body, and two adjacent groups of blade teeth are staggered with each other in the circumferential direction of the blade body.

[0011] Furthermore, the blade body is made of steel or aluminum alloy, and the blade teeth are made of cemented carbide or diamond.

[0012] Beneficial effect: When the pre-milling cutter is installed on the workstation motor shaft, the shaft-hole fit is achieved through hydraulic clamping, thereby improving assembly accuracy. Without changing the motor shaft structure, high processing accuracy and service life are achieved, which can meet the technical requirements of seamless edge sealing of laser edge banding machines.

[0013] The pre-milling cutter can achieve an outer diameter radial runout within 0.008 mm during grinding;

[0014] When the pre-milling cutter is used, the workpiece can be machined with higher precision, so that the machined material can obtain higher smoothness, and the product itself can also achieve the purpose of increasing its service life due to the higher machining precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the front view of the pre-milling cutter with hydraulic device;

[0016] Figure 2 It is a side view of the pre-milling cutter with hydraulic device;

[0017] Figure 3 This is a cross-sectional view of a pre-milling cutter with a hydraulic device;

[0018] In the figure: 1- cutter body; 2- cutter teeth; 3- hydraulic sleeve; 4- motor shaft hole; 5- expansion oil chamber; 6- pressurized channel; 7- pressurized screw; 8- assembly screw; 9- positioning boss; 10- keyway. DETAILED DESCRIPTION

[0019] The present invention will be further explained below in conjunction with the accompanying drawings.

[0020] like Figures 1 to 3 As shown, a pre-milling cutter with a hydraulic device of the present invention includes a pre-milling cutter unit and an expansion unit.

[0021] The pre-milling cutter unit consists of a cutter body 1 and teeth 2. The cutter body 1 is made of steel or aluminum alloy, and the teeth 2 are made of carbide or diamond. The cutter body 1 is disc-shaped or cylindrical, with multiple teeth 2 arranged on the outer circumference of the cutter body 1. The teeth 2 are divided into several groups along the width of the cutter body 1, and adjacent groups of teeth 2 are staggered along the circumference of the cutter body 1. A sleeve hole is provided in the center of the cutter body 1 for mounting the expansion unit.

[0022] The expansion unit includes a hydraulic sleeve 3, which is arranged in the sleeve hole. The outer circle of the hydraulic sleeve 3 is provided with an annular positioning protrusion 9, and the annular protrusion 9 is provided with a screw hole. The sleeve hole of the cutter body 1 is provided with an annular positioning groove adapted to the annular protrusion 9, and the annular positioning groove is provided with a threaded hole corresponding to the screw hole. The assembly screw 8 passes through the screw hole and is screwed into the threaded hole, thereby connecting and fixing the hydraulic sleeve 3 and the cutter body 1 through the assembly screw 8.

[0023] A motor shaft hole 4 is provided at the center of the hydraulic sleeve 3 for mounting the motor shaft. A key groove 10 is provided on the inner wall of the motor shaft hole 4 of the hydraulic sleeve 3 , and the key groove 10 cooperates with the key on the motor shaft to achieve key connection.

[0024] An expansion oil chamber 5 and a pressurizing channel 6 are provided inside the hydraulic sleeve 3. The expansion oil chamber 5 is close to and surrounds the motor shaft hole 4. The expansion oil chamber 5 is filled with hydraulic oil. A screw hole is provided on the side of the hydraulic sleeve 3. A pressurizing screw 7 is screwed into the screw hole. The bottom of the screw hole is connected to the expansion oil chamber 5 through the pressurizing channel 6.

[0025] When in use, by tightening the pressure screw 7, the pressure screw 7 applies pressure to the expansion oil chamber 5. The pressure forces the inner wall of the oil chamber to deform, so as to achieve the purpose of holding the hole and the shaft tightly, and reduce the matching clearance between the hole and the shaft to zero.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A pre-milling cutter with a hydraulic device, characterized in that: It includes a pre-milling cutter unit and a tightening unit. The pre-milling cutter unit includes a cutter body, which is disc-shaped or cylindrical. A plurality of cutter teeth are arranged on the outer circle of the cutter body, and a sleeve hole is arranged in the center of the cutter body. The tightening unit includes a hydraulic sleeve, which is arranged in the sleeve hole. A motor shaft hole is arranged in the center of the hydraulic sleeve. An expansion oil chamber and a pressurizing channel are arranged inside the hydraulic sleeve. The expansion oil chamber is close to and surrounds the motor shaft hole. The expansion oil chamber is filled with hydraulic oil. A screw hole is provided on the side of the hydraulic sleeve. A pressurizing screw is screwed into the screw hole. The bottom of the screw hole is connected to the inflation oil chamber through a pressurizing channel.

2. A pre-milling cutter with a hydraulic device according to claim 1, characterized in that: The hydraulic sleeve is connected and fixed to the cutter body by assembling screws.

3. A pre-milling cutter with a hydraulic device according to claim 2, characterized in that: The outer circle of the hydraulic sleeve is provided with an annular positioning protrusion, the annular protrusion is provided with a screw hole, the sleeve hole of the cutter body is provided with an annular positioning groove adapted to the annular protrusion, and the annular positioning groove is provided with a threaded hole corresponding to the screw hole, and the assembly screw passes through the screw hole and is screwed into the threaded hole.

4. The pre-milling cutter with a hydraulic device according to claim 1, characterized in that: The inner wall of the motor shaft hole of the hydraulic shaft sleeve is provided with a keyway.

5. The pre-milling cutter with a hydraulic device according to claim 1, characterized in that: The blade teeth are divided into several groups along the width direction of the blade body, and two adjacent groups of blade teeth are staggered with each other in the circumferential direction of the blade body.

6. The pre-milling cutter with a hydraulic device according to claim 1, characterized in that: The material of the blade body is steel or aluminum alloy, and the material of the blade teeth is cemented carbide or diamond.

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