Connecting structure of blade part and cutter handle of hard alloy cutter

Abstract

The utility model discloses a connecting structure of a blade part and a cutter handle of a hard alloy cutter, the cutter comprises the blade part and the cutter handle, the bottom end of the blade part is fixedly connected with the top end of the cutter handle through welding so that the blade part and the cutter handle form an integral cutter, a V-shaped bulge is arranged at the bottom end of the blade part, and a V-shaped groove is arranged at the top end of the cutter handle. The V-shaped protrusion and the V-shaped groove are matched in size and shape, the V-shaped protrusion is arranged in the V-shaped groove, a left protruding block protruding outwards is arranged on the left outer inclined face of the V-shaped protrusion, a right protruding block protruding outwards is arranged on the right outer inclined face of the V-shaped protrusion, a left groove is formed in the left inner inclined face of the V-shaped groove, and a right groove is formed in the right inner inclined face of the V-shaped groove. A left groove is formed in the left inner inclined face of the V-shaped groove, a right groove is formed in the right inner inclined face of the V-shaped groove, the left protruding block and the left groove are matched in size and shape, the left protruding block is embedded in the left groove, the right protruding block and the right groove are matched in size and shape, and the right protruding block is embedded in the right groove. The connection between the blade part and the cutter handle is stable and reliable, and the safe use performance of the cutter is greatly improved.

Description

Technical Field

[0001] The utility model relates to a hard alloy tool for mechanical processing, in particular to a connecting structure of a blade and a handle of a hard alloy tool, belonging to the technical field of metal cutting tools. Background Art

[0002] The existing cemented carbide tool commonly used in mechanical processing includes a blade made of cemented carbide for cutting workpieces and a shank made of carbon steel for clamping on a machine tool. The bottom plane of the blade is fixedly connected to the top plane of the shank by welding, so that the two form an integral tool. This tool formed by welding a cemented carbide blade and a carbon steel shank combines the advantages of high cutting performance and economic practicality. However, the cemented carbide tool of this structure has the following disadvantages during actual use, that is, since the welding process is currently usually operated manually, there is an unstable welding quality, resulting in an unstable connection between the blade and the shank. Therefore, when the tool is in use, due to force or improper operation, the welding part often cracks or even breaks, thereby causing the blade to separate from the shank, causing safety risks and causing the tool and workpiece to be scrapped. Summary of the invention

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a connection structure between the blade and the handle of a cemented carbide tool which is not only simple in structure but also can make the connection between the blade and the handle more stable and reliable, thereby greatly improving the safe use performance of the tool.

[0004] In order to solve the above technical problems, the utility model adopts such a connection structure of the blade and the handle of a cemented carbide tool, the tool comprises a blade made of cemented carbide for cutting a workpiece and a handle made of carbon steel for clamping on a machine tool, the bottom end of the blade is fixedly connected to the top end of the handle by welding so that the two constitute an integral tool, a V-shaped protrusion is provided at the bottom end of the blade, and a V-shaped groove is provided at the top end of the handle, the V-shaped protrusion is matched in size and shape with the V-shaped groove and the V-shaped protrusion is placed in the V-shaped groove, a left protruding block protruding outward is provided on the left outer inclined surface of the V-shaped protrusion, a right protruding outward is provided on the right outer inclined surface of the V-shaped protrusion, a left groove is provided on the left inner inclined surface of the V-shaped groove, and a right groove is provided on the right inner inclined surface of the V-shaped groove, the left protrusion is matched in size and shape with the left groove and the left protrusion is embedded in the left groove, the right protrusion is matched in size and shape with the right groove and the right protrusion is embedded in the right groove.

[0005] As a preferred implementation mode of the present invention, the cross-sectional shapes of the left protrusion, the left groove, the right protrusion, and the right groove are all dovetail-shaped.

[0006] As a preferred implementation manner of the present utility model, the cross-sectional shapes of the left protrusion, the left groove, the right protrusion, and the right groove are all T-shaped.

[0007] As a preferred embodiment of the present invention, the cross-sectional shape of the left protrusion and the left groove is dovetail-shaped, and the cross-sectional shape of the right protrusion and the right groove is rectangular.

[0008] As a preferred embodiment of the utility model, a penetrating square hole is provided at the sharp corner of the V-shaped protrusion and the V-shaped groove, and a square wedge is tightly installed in the square hole.

[0009] After adopting the above structure, the utility model has the following beneficial effects:

[0010] The utility model is provided with a V-shaped protrusion at the bottom end of the blade, and a V-shaped groove is provided at the top end of the handle. The V-shaped protrusion is adapted to the size and shape of the V-shaped groove and is placed in the V-shaped groove. A left protrusion protruding outward is provided on the left outer inclined surface of the V-shaped protrusion, a right protrusion protruding outward is provided on the right outer inclined surface of the V-shaped protrusion, a left groove is provided on the left inner inclined surface of the V-shaped groove, and a right groove is provided on the right inner inclined surface of the V-shaped groove. The left protrusion is adapted to the size and shape of the left groove and the left protrusion is embedded in the left groove, and the right protrusion is adapted to the size and shape of the right groove and the right protrusion is embedded in the right groove. That is to say, the bottom end of the blade of the utility model is not only fixedly connected with the top end of the handle by welding, but also the left protrusion is embedded in the left groove and the right protrusion is embedded in the right groove, so that the connection structure between the blade and the handle is more stable and reliable. When the knife is in use, the blade and the handle will not be separated, which greatly improves the safety performance of the knife.

[0011] The cross-sectional shapes of the left protrusion, the left groove, the right protrusion and the right groove of the utility model are all dovetail-shaped or T-shaped. Such a structure makes the connection between the blade and the handle more firm and withstands greater cutting force.

[0012] The cross-section of the left protrusion and the left groove of the utility model is in a dovetail shape, and the cross-section of the right protrusion and the right groove is in a rectangular shape. Such a structure makes the connection between the blade and the handle firm and the installation more convenient.

[0013] The utility model arranges a penetrating square hole at the sharp corners of the V-shaped protrusion and the V-shaped groove, and a square wedge is tightly installed in the square hole. Such a structure further strengthens the connection structure between the blade and the handle, making the connection strength between the two greater. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0015] Figure 1The utility model is a structural schematic diagram of the connection structure between the blade and the handle of the cemented carbide tool.

[0016] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle. DETAILED DESCRIPTION

[0017] See also Figure 1 , Figure 2 The blade and handle connection structure of a cemented carbide tool is shown, the tool comprises a blade 1 made of cemented carbide for cutting a workpiece and a handle 2 made of carbon steel for clamping on a machine tool, the bottom end of the blade 1 is fixedly connected to the top end of the handle 2 by welding so that the two form an integral tool, a V-shaped protrusion 1a is provided at the bottom end of the blade 1, and a V-shaped groove 2a is provided at the top end of the handle 2, the V-shaped protrusion 1a and the V-shaped groove 2a are adapted in size and shape and the V-shaped protrusion 1a is placed in the V-shaped groove 2a, A left convex block 3 protruding outward is provided on the left outer inclined surface of the V-shaped protrusion 1a, a right convex block 4 protruding outward is provided on the right outer inclined surface of the V-shaped protrusion 1a, a left groove 5 is provided on the left inner inclined surface of the V-shaped groove 2a, and a right groove 6 is provided on the right inner inclined surface of the V-shaped groove 2a. The left convex block 3 is matched with the left groove 5 in size and shape and is embedded in the left groove 5. The right convex block 4 is matched with the right groove 6 in size and shape and is embedded in the right groove 6. Figure 1 , 2 As shown, there is welding metal 9 formed after the welding process is completed and heat-insulated and solidified between the V-shaped protrusion 1a at the bottom end of the blade 1 and the V-shaped groove 2a at the top end of the handle 2 of the utility model.

[0018] As a preferred embodiment of the present invention, Figure 1 , 2 As shown, the cross-sectional shapes of the left protrusion 3, the left groove 5, the right protrusion 4, and the right groove 6 are all dovetail-shaped.

[0019] As a preferred embodiment of the present utility model, the cross-sectional shapes of the left protrusion 3, the left groove 5, the right protrusion 4, and the right groove 6 are all T-shaped, which is not shown in the figure.

[0020] As a preferred embodiment of the utility model, the cross-sectional shape of the left protrusion 3 and the left groove 5 is dovetail-shaped, and the cross-sectional shape of the right protrusion 4 and the right groove 6 is rectangular. The cross-sectional shape of the right protrusion 4 and the right groove 6 is not shown in the figure.

[0021] The cross-sectional shapes of the left protrusion 3, the left groove 5, the right protrusion 4, and the right groove 6 of the utility model can adopt other shapes besides the above shapes.

[0022] As a preferred embodiment of the present invention, Figure 1 , 2 As shown, a through square hole 7 is provided at the sharp corner of the V-shaped protrusion 1a and the V-shaped groove 2a, and a square wedge block 8 is tightly installed in the square hole 7. In practice, after the welding process is completed and the heat preservation and curing are completed, the square hole 7 can be cut out at the sharp corner of the V-shaped protrusion 1a and the V-shaped groove 2a by using a wire cutting process, and then the square hole 7 can be blocked by using the tightly fitted square wedge block 8.

[0023] After trial use, the utility model has been found to have a simple structure, a stable and reliable connection between the blade and the handle, which greatly improves the safe use performance of the tool and achieves good practical effects.

Claims

1. A connection structure between a blade and a shank of a cemented carbide tool, the tool comprising a blade (1) made of cemented carbide for cutting a workpiece and a shank (2) made of carbon steel for clamping on a machine tool, the bottom end of the blade (1) being fixedly connected to the top end of the shank (2) by welding so that the two form an integral tool, characterized in that: A V-shaped protrusion (1a) is provided at the bottom end of the blade (1), and a V-shaped groove (2a) is provided at the top end of the shank (2); the V-shaped protrusion (1a) and the V-shaped groove (2a) are matched in size and shape, and the V-shaped protrusion (1a) is placed in the V-shaped groove (2a); a left protrusion (3) protruding outward is provided on the left outer inclined surface of the V-shaped protrusion (1a); a right protrusion (4) protruding outward is provided on the right outer inclined surface of the V-shaped protrusion (1a); a left groove (5) is provided on the left inner inclined surface of the V-shaped groove (2a); and a right groove (6) is provided on the right inner inclined surface of the V-shaped groove (2a); the left protrusion (3) and the left groove (5) are matched in size and shape, and the left protrusion (3) is embedded in the left groove (5); the right protrusion (4) and the right groove (6) are matched in size and shape, and the right protrusion (4) is embedded in the right groove (6).

2. The cutting edge and handle connection structure of a cemented carbide tool according to claim 1, characterized in that: The cross-sectional shapes of the left protrusion (3), the left groove (5), the right protrusion (4), and the right groove (6) are all dovetail-shaped.

3. The connection structure between the blade and the handle of a cemented carbide tool according to claim 1, characterized in that: The cross-sectional shapes of the left protrusion (3), the left groove (5), the right protrusion (4), and the right groove (6) are all T-shaped.

4. The cutting edge and handle connection structure of a cemented carbide tool according to claim 1, characterized in that: The cross-sectional shape of the left protrusion (3) and the left groove (5) is dovetail-shaped, and the cross-sectional shape of the right protrusion (4) and the right groove (6) is rectangular.

5. The connection structure between the blade and the handle of a cemented carbide tool according to any one of claims 1 to 4, characterized in that: A through square hole (7) is provided at the sharp corner of the V-shaped protrusion (1a) and the V-shaped groove (2a), and a square wedge block (8) is tightly mounted in the square hole (7).

Images