Diamond pre-milling cutter with single-double bond switching function

Abstract

The utility model relates to the field of woodworking tools. The diamond pre-milling cutter comprises a disc type cutter body, a plurality of blade parts are arranged on the outer side wall of the cutter body, a mounting hole penetrating through the upper surface and the lower surface of the cutter body is formed in the center of the cutter body, and two key grooves are symmetrically formed in the two sides of the mounting hole; the key matching pin is matched with the key groove, the pin pressing blocks are arranged on the upper surface and the lower surface of the cutter body in pairs, and the pin pressing blocks are connected with the cutter body through set screws; one end of the pin pressing block is opposite to the two ends of the key groove, and the key matching pin is pressed in the key groove; the key matching pin is formed by splicing an inner pin body and an outer pin body, and the contact surfaces of the two pin bodies are inclined surfaces; and the surface of one side, close to the mounting hole, of the pin body on the inner side is an arc-shaped surface. The utility model can be simultaneously matched with single-key and double-key driving shafts, and is stable and reliable in installation.

Description

Technical Field

[0001] The utility model relates to the field of woodworking tools, in particular to a pre-milling cutter. Background Art

[0002] Disc pre-milling cutters are a type of cutting tool used on edge banding machines during the production of panel furniture. They are installed before the gluing process. Their main function is to pre-mill the edge of the board (opening seam) to achieve a sufficient degree of flatness, thereby achieving better results in subsequent gluing, pressing and other processes. At present, due to the large number of edge banding machine brands and the lack of a unified standard, the edge banding machines used by various furniture factories are different. Pre-milling cutters are a type of consumable tool that needs to be replaced frequently on edge banding machines. Due to different standards, when changing the cutter, it is often impossible to install it because the model does not match the motor spindle. Figure 1 As shown in the figure, there are existing disc-type pre-milling cutters. Even if there are two pre-milling cutters with the same outer diameter of 125mm, inner diameter of 30mm and height of 43mm, some brands use single keyway and the other part uses double keyway, which causes certain troubles to the mechanics in actual operation. The pre-milling cutter with a single keyway obviously cannot be directly installed on the motor shaft with a double keyway. Although the pre-milling cutter with a double keyway can be forcibly installed on the motor shaft with a single keyway, its dynamic balance performance is poor and there is a huge noise during operation. Therefore, if there is a pre-milling cutter that can realize the switching between single and double keys, it will be able to solve the above problems to a large extent. Summary of the invention

[0003] The utility model aims to provide a diamond pre-milling cutter with a single-key and double-key switching function, which can be adapted to a single-key driving shaft and a double-key driving shaft at the same time.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is: a diamond pre-milling cutter with a single-double key switching function, comprising a disc-shaped cutter body, a plurality of cutting edges are arranged on the outer wall of the cutter body, a mounting hole penetrating the upper and lower surfaces of the cutter body is arranged at the center of the cutter body, and two keyways are symmetrically arranged on both sides of the mounting hole;

[0005] It also includes a key pin matching the keyway, and pin pressing blocks arranged in pairs on the upper and lower surfaces of the cutter body, the pin pressing blocks are connected to the cutter body through set screws; one end of the pin pressing block is opposite to the two ends of the keyway, and presses the key pin in the keyway; the key pin is composed of two inner and outer pin bodies, and the contact surfaces of the two pin bodies are inclined surfaces; the surface of the inner pin body close to the mounting hole is an arc surface.

[0006] Preferably, the keyways on both sides of the cutter body are provided with pressing pin blocks.

[0007] Preferably, the pressing pin block is in a strip shape, and a mounting groove extending radially along the cutter body is provided at positions of the upper and lower surfaces of the cutter body opposite to the pressing pin block, the width of the mounting groove is adapted to the width of the pressing pin block, and the pressing pin block is located in the mounting groove;

[0008] The end of the pressing pin block close to the keyway is thickened to form a trapezoidal head; a strip hole extending along the length direction of the pressing pin block is arranged in the middle of the pressing pin block, and the set screw passes through the strip hole to lock the pressing pin block and the cutter body.

[0009] Preferably, the blade is a diamond blade or a cemented carbide blade.

[0010] The beneficial effects of the utility model are concentrated in that it can adapt to single-key and double-key drive shafts at the same time, and the installation is stable and reliable. Specifically, when the utility model is used, it can be directly adapted to the drive shaft of the double keyway. At this time, the key pin is not installed, and the two key teeth of the drive shaft are respectively inserted into the two keyways at the installation hole. When it is necessary to install it on the drive shaft of the single keyway, first install the pressure pin block on the bottom surface of the cutter body, then set the cutter body on the drive shaft, the key teeth on the drive shaft are inserted into one keyway, and then the matching key pin is inserted into the other empty keyway, and the pressure pin block on the top surface of the cutter body is installed, ensuring that the pressure pin blocks on the upper and lower surfaces compact and tighten the matching key pin, so as to adapt the single-key and double-key drive shafts as needed. At the same time, since the matching key pin of the utility model is composed of two pin bodies, and the contact plane between the two is an inclined plane, in the process of pressing the pressure pin block up and down, the two pin bodies can maintain close contact with the keyway and the drive shaft under the extrusion action, so that the overall dynamic balance is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of an existing disc pre-milling cutter;

[0012] Figure 2 It is a schematic diagram of the structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the structure of a preferred embodiment of the utility model;

[0014] Figure 4 The figure is a schematic diagram of the installation of the key pin;

[0015] Figure 5 It is a schematic diagram of the structure of the key pin and the pressing pin block. DETAILED DESCRIPTION

[0016] like Figure 2-5The diamond pre-milling cutter with single and double key switching function shown is installed on the edge banding machine used in the production of panel furniture, and is mainly used for pre-milling and trimming the cut surface of the board to match the subsequent sticking of the edge banding tape. The utility model can be universally adapted to different edge banding machine models when there are differences in the key teeth of the drive shaft, making the tool change operation more universal and flexible, and reducing unnecessary troubles caused by the mismatch of the key teeth of the drive shaft.

[0017] The utility model is similar to the traditional disc pre-milling cutter in that it also includes a disc-shaped cutter body 1, and a plurality of blades 2 are arranged on the outer wall of the cutter body 1. The blades 2 are diamond blades 2 or carbide blades 2, but more diamond blades are used, which have better wear resistance and longer service life. A mounting hole 3 is arranged at the center of the cutter body 1 and passes through the upper and lower surfaces of the cutter body 1. Two keyways 4 are symmetrically arranged on both sides of the mounting hole 3.

[0018] The pre-milling cutter described in the utility model all adopts double key slots 4, which can directly adapt to the double-key drive shaft. When it is necessary to adapt to the single-key drive shaft, one of the key slots is filled by adding other components to ensure the overall dynamic balance and installation stability. This is also the biggest difference between the utility model and the existing pre-milling cutter.

[0019] The specific method is as follows Figure 2 As shown in the figure, the utility model further includes a key pin 5 matching the key slot 4, and a pressing pin block 6 arranged in pairs on the upper and lower surfaces of the cutter body 1. That is to say, the utility model has a key pin 5, which is inserted into the key slot 4 as required to fill one key slot 4 so that the mounting hole 3 can form a single key slot 4. The pressing pin block 6 is used to fix the upper and lower ends of the key pin 5 to ensure the stability of the installation, such as Figure 4 As shown in , the pressing pin block 6 is connected to the cutter body 1 by a set screw 7. One end of the pressing pin block 6 is opposite to the two ends of the keyway 4, and the key pin 5 is pressed tightly in the keyway 4.

[0020] The specific form of the pressing pin block 6 of the utility model is more, and it can be a simple square block, round block, etc. But a better way can also be as follows Figure 5 As shown in the figure, the end of the pressing pin block 6 close to the keyway 4 is thickened to form a trapezoidal head 9. A strip hole 10 extending along the length direction of the pressing pin block 6 is provided in the middle of the pressing pin block 6, and the set screw 7 passes through the strip hole 10 to lock the pressing pin block 6 and the cutter body 1. The provision of the strip hole 10 allows the pressing pin block 6 to have a certain installation margin, which can reduce the accuracy requirements for the screw hole corresponding to the set screw 7 on the cutter body 1, reduce the processing accuracy requirements, and simplify the processing.

[0021] At the same time, since the pre-milling cutter is a high-speed rotating component, in order to ensure the stability of the installation of the pressing pin block 6, a better approach can also be as follows Figure 4 and5 As shown in the figure, the pressing pin block 6 is in a strip shape, and a mounting groove extending radially along the cutter body 1 is provided at the positions of the upper and lower surfaces of the cutter body 1 opposite to the pressing pin block 6. The width of the mounting groove is adapted to the width of the pressing pin block 6. The pressing pin block 6 is located in the mounting groove, and the pressing pin block 6 is limited to a certain extent by the mounting groove, which can ensure the stability of the pressing pin block 6 during the high-speed rotation of the pre-milling cutter. The limiting support of the mounting groove can also reduce the shear stress of the set screw and improve the overall service life.

[0022] Another special feature of the present invention is that Figure 5 As shown in , the key pin 5 is composed of two inner and outer pin bodies 8, and the contact surfaces of the two pin bodies 8 are inclined surfaces. The surface of the inner pin body 8 close to the mounting hole 3 is an arc surface. In the process of pressing the pin block 6 up and down, the two pin bodies 8 can maintain close contact with the key slot 4 and the drive shaft under the extrusion effect, so that the overall dynamic balance is better. Figure 2 and 3 As shown in the figure, the cutter body 1 of the present invention can be provided with a pressing pin block 6 only at one side of the keyway 4, or can be provided with pressing pin blocks 6 at the keyways 4 on both sides, so as to achieve weight balance on the symmetrical side of the cutter body 1 and better dynamic balance.

Claims

1. A diamond pre-milling cutter with a single-double key switching function, comprising a disc-shaped cutter body (1), a plurality of blades (2) being arranged on the outer wall of the cutter body (1), a mounting hole (3) penetrating the upper and lower surfaces of the cutter body (1) being arranged at the center of the cutter body (1), and two key slots (4) being symmetrically arranged on both sides of the mounting hole (3); Features: It also includes a key pin (5) matching the key slot (4), and a pair of pressing pin blocks (6) arranged on the upper and lower surfaces of the knife body (1), wherein the pressing pin blocks (6) are connected to the knife body (1) via set screws (7); one end of the pressing pin block (6) is opposite to the two ends of the key slot (4), and the key pin (5) is pressed tightly into the key slot (4); the key pin (5) is composed of two inner and outer pin bodies (8), and the surfaces of the two pin bodies (8) in contact are inclined surfaces; the surface of the inner pin body (8) close to the mounting hole (3) is an arc surface.

2. The diamond pre-milling cutter with single and double key switching function according to claim 1, characterized in that: Pressing pin blocks (6) are provided at the keyways (4) on both sides of the knife body (1).

3. The diamond pre-milling cutter with single and double key switching function according to claim 2, characterized in that: The pressing pin block (6) is in a strip shape, and a mounting groove extending radially along the blade body (1) is provided at positions of the upper and lower surfaces of the blade body (1) opposite to the pressing pin block (6), the width of the mounting groove being adapted to the width of the pressing pin block (6), and the pressing pin block (6) being located in the mounting groove; The end of the pressing pin block (6) close to the keyway (4) is thickened to form a trapezoidal head (9); a strip hole (10) extending along the length direction of the pressing pin block (6) is provided in the middle of the pressing pin block (6); the set screw (7) passes through the strip hole (10) to lock the pressing pin block (6) and the knife body (1).

4. The diamond pre-milling cutter with single and double key switching function according to claim 1, characterized in that: The blade (2) is a diamond blade or a cemented carbide blade.

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