Molding support cutter

Abstract

The forming support cutter comprises a main cutter body and a center cutter body, the main cutter body comprises a main cutter handle and a main cutter head, the main cutter head is arranged at the front end of the main cutter handle and comprises a cylindrical base and a chamfering support, and a cylindrical installation cavity is formed in the center of the front end face of the cylindrical base. Two chamfering supports are arranged around the mounting cavity in a 180-degree central symmetry mode, chamfering blades are installed on the inner side corners of the front ends of the two chamfering supports, an assembly hole leading to the main cutter handle is formed in the bottom face of the mounting cavity in the axial direction, the tail of the center cutter body is installed in the assembly hole and the mounting cavity in an embedded mode, and a drill bit is arranged at the front end of the center cutter body. The drill bit is higher than the front end of the chamfering bracket; the forming support cutter can complete drilling of the center of a cylindrical part and chamfering of the end face at a time, and the machining efficiency and precision are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of machining tool, concretely relates to a forming support knife. BACKGROUND

[0002] In the machining process of mechanical parts, it is often necessary to drill a hole in the center of a cylindrical member. Through the center hole, the cylindrical member can be connected with other parts. In order to facilitate the assembly of the cylindrical member, the end of the cylindrical member also needs to be chamfered. The chamfer can help the cylindrical member enter another end or part more easily, and can also effectively reduce the stress concentration on the surface of the part, thereby reducing the risk of wear and tear and cracks of the part and prolonging the service life of the part. At present, the drilling and chamfering of the cylindrical member are usually divided into two processing procedures. First, a center hole is drilled by a drill bit, and then a chamfering tool is used for chamfering. This not only has low processing efficiency, but also affects the machining accuracy due to multiple processing. SUMMARY

[0003] To solve the above problems and technical needs, the utility model provides a forming support knife which can complete the drilling of the center of the cylindrical part and the chamfering of the end face at one time, thereby improving the processing efficiency and accuracy.

[0004] The technical scheme of the utility model is as follows: a forming support knife comprises a main tool body and a center tool body. The main tool body comprises a main tool handle and a main tool head. The main tool head is arranged at the front end of the main tool handle. The main tool head comprises a cylindrical base and a chamfer support. A cylindrical mounting cavity is arranged in the center of the front end face of the cylindrical base. Two chamfer supports are arranged in a 180° center symmetry around the mounting cavity. Chamfer blades are arranged on the inner side of the front end of the two chamfer supports. An assembly hole is arranged in the bottom face of the mounting cavity along the axial direction and leads to the main tool handle. The tail of the center tool body is embedded in the assembly hole and the mounting cavity. The front end of the center tool body is a drill bit which is higher than the front end of the chamfer support.

[0005] Further, the center tool body comprises a tool handle, a tool neck and a drill bit. The tool neck is connected with the drill bit at the front end and connected with the tool handle at the rear end. A positioning plane is arranged on the circumferential surface of the tool handle. The tool handle can be embedded in the assembly hole. The tool handle is limited in the circumferential direction by the positioning plane and the assembly hole. A threaded positioning hole is arranged on the circumferential surface of the cylindrical base and leads to the assembly hole. A flat head screw connected in the threaded positioning hole can be tightly arranged on the positioning plane to lock the tool handle.

[0006] Further, the drill bit comprises a first step, a second step, a chamfer blade and a drill tip. The front end of the drill bit is a tapered drill tip. The drill tip is connected with the first step. The first step is connected with the second step at the other end. The diameter of the first step is smaller than that of the second step. The chamfer blade is arranged between the first step and the second step.

[0007] Further, the taper of the drill tip is 120 degrees.

[0008] Further, the drill tip to the second step is provided with a chip flute, the chip flute is arranged on the peripheral surface of the drill bit in the axial direction.

[0009] Further, the chamfer blade is installed on the chamfer support through a screw, the edge opposite to the center blade body is a blade edge, and the blade edge and the main blade body form a 45-degree included angle in the radial direction.

[0010] Further, the diameter of the neck of the center blade body is consistent with the diameter of the mounting cavity, when the shank of the center blade body is embedded into the assembly hole, the neck of the center blade body is correspondingly embedded into the mounting cavity.

[0011] Further, the core of the main shank is provided with a rear cooling hole, and the core of the center blade body is also provided with a front cooling hole leading to the drill bit, when the center blade body is embedded into the main blade body, the front cooling hole and the rear cooling hole are communicated, and the cooling liquid injected from the rear cooling hole can reach the drill bit through the front cooling hole.

[0012] The utility model discloses a beneficial effect: this cutter is used for the center drilling of cylindrical parts and end face chamfering, adopts the mode that the center blade body is embedded in the main blade body, and the end face is chamfered outward by the chamfer blade installed on the main blade body while the center blade body is drilled to the part, and the machining efficiency is high, and the machining precision can be greatly improved, and the machining quality of finished products is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the assembly structure diagram of the center blade body and the main blade body of the utility model forming support cutter;

[0014] Fig. 2 It is the axial structure diagram of the main blade body in the utility model;

[0015] Fig. 3 It is the axial structure diagram of the center blade body in the utility model;

[0016] In the drawing, it is marked as: main blade body 1, main shank 2, rear cooling hole 21, main blade head 3, cylindrical base 31, chamfer support 32, chamfer blade 321, mounting cavity 33, assembly hole 34, threaded positioning hole 35, center blade body 4, drill bit 41, first step 411, second step 412, chamfer edge 413, drill tip 414, chip flute 415, front cooling hole 416, neck 42, shank 43, positioning plane 431. DETAILED DESCRIPTION

[0017] The application will be further described below in combination with the drawings and examples.

[0018] As Figs. 1-3The utility model discloses a forming support cutter, including main cutter body 1 and center cutter body 4, main cutter body 1 includes main cutter handle 2 and main cutter head 3, and the main cutter head 3 sets up at the front end of main cutter handle 2, and the main cutter head 3 includes cylindrical pedestal 31 and chamfer support 32, and the cylindrical pedestal 31 front end face center is provided with the cylindrical installation cavity 33, and is provided with two chamfer supports 32 around installation cavity 33 and is 180 ° center symmetry, and the inside angle part of two chamfer supports 32 front end is equipped with chamfer blade 321, and the bottom surface of installation cavity 33 is provided with assembly hole 34 leading to main cutter handle 2 along the axial direction, and the tail of center cutter body 4 is embedded in assembly hole 34 and installation cavity 33, and the front end of center cutter body 4 is drill bit 41, and drill bit 41 is higher than the front end of chamfer support 32.

[0019] The chamfer blade 321 is installed on the chamfer support 32 by a screw, and the edge opposite to the center cutter body 4 is a blade edge, and the blade edge and the main cutter body 1 form a 45-degree included angle in the radial direction.

[0020] The center cutter body 4 includes a cutter handle 43, a cutter neck 42 and a drill bit 41, the cutter neck 42 is connected with the drill bit 41 at the front end and connected with the cutter handle 43 at the rear end, the circumferential surface of the cutter handle 43 is provided with a positioning plane 431, the cutter handle 43 can be embedded into the assembly hole 34, the cutter handle 43 is limited in the circumferential direction by the positioning plane 431 and the assembly hole 34, the circumferential surface of the cylindrical pedestal 31 is provided with a threaded positioning hole 35 leading to the assembly hole 34, and the top of the flat head screw connected in the positioning threaded hole 35 can be tightly pressed on the positioning plane 431 to lock the cutter handle 43. The drill bit 41 includes a first step 411, a second step 412, a chamfer blade 413 and a drill tip 414, the front end of the drill bit 41 is a tapered drill tip 414, the taper of the drill tip 414 is 120 degrees, the drill tip 414 is connected with the first step 411, the other end of the first step 411 is connected with the second step 412, the diameter of the first step 411 is smaller than that of the second step 412, and the chamfer blade 413 is arranged between the first step 411 and the second step 412.

[0021] A chip removal groove 415 is arranged between the drill tip 414 and the second step 412, and the chip removal groove 415 is arranged on the circumferential surface of the drill bit 41 in the axial direction. The diameter of the cutter neck of the center cutter body 4 is consistent with the diameter of the installation cavity, and when the cutter handle 43 of the center cutter body 4 is embedded into the assembly hole 34, the cutter neck 42 of the center cutter body 4 is embedded into the installation cavity 33.

[0022] The core of the main cutter handle 2 is provided with a rear cooling hole 21, and the core of the center cutter body 4 is also provided with a front cooling hole 416 leading to the drill bit, when the center cutter body 4 is embedded into the main cutter body 1, the front cooling hole 416 and the rear cooling hole 21 are communicated, and the cooling liquid injected from the rear cooling hole 21 can reach the drill bit 41 through the front cooling hole 416.

[0023] The working principle of the utility model is as follows:

[0024] The center tool body 4 is embedded into the main tool body 1, wherein the shank of the center tool body 4 is embedded into the assembly hole 34, the neck 42 of the center tool body 4 is embedded into the installation cavity 33, the center tool body 4 is locked in the main tool body 1 by screwing the flat head screw in the threaded positioning hole 35 inward and pressing on the positioning plane 431, the center tool body 4 and the main tool body 1 are kept circumferentially locked, the rear cooling hole 21 leads to the assembly hole 34, thus the front cooling hole 416 communicates with the rear cooling hole 21 after assembly, and the cooling liquid can be injected from the tail end of the rear cooling hole 21 to apply the cooling liquid to the drill bit 41 and the chamfer blade 321, thereby preventing the drill bit from collapsing due to high temperature during work.

[0025] During drilling, for the same cylindrical part, the drill bit 41 drills the center of the part, the chips are discharged outward through the chip groove 415, the chamfer blade 321 on the chamfer support 32 contacts the outer edge of the end face of the part as the drilling extends, and the chamfer blade 321 processes the outer chamfer of the end face of the part, and the chamfer angle is 45 degrees.

[0026] The above only describes several preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes and replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A forming support knife, characterized in that: It includes a main cutter body and a center cutter body. The main cutter body includes a main cutter shank and a main cutter head. The main cutter head is located at the front end of the main cutter shank and includes a cylindrical base and a chamfered bracket. A cylindrical mounting cavity is opened at the center of the front end face of the cylindrical base. Two chamfered brackets are arranged symmetrically at 180° around the mounting cavity. Chamfered blades are installed on the inner corners of the front ends of the two chamfered brackets. An assembly hole leading to the main cutter shank is opened along the axial direction on the bottom surface of the mounting cavity. The tail end of the center cutter body is embedded in the assembly hole and the mounting cavity. The front end of the center cutter body is a drill bit, which is higher than the front end of the chamfered bracket.

2. The forming bracket knife according to claim 1, characterized in that: The central cutting body includes a handle, a neck, and a drill bit. The drill bit is connected to the front end of the neck, and the handle is connected to the rear end. A positioning plane is provided on the circumferential surface of the handle, and the handle can be inserted into the mounting hole accordingly. The handle is circumferentially limited by the positioning plane and the mounting hole. A threaded positioning hole leading to the mounting hole is opened on the circumferential surface of the cylindrical base. The top of the flat-head screw connected in the positioning threaded hole can be pressed against the positioning plane to lock the handle.

3. The forming support blade according to claim 2, characterized in that: The drill bit includes a first step, a second step, a chamfered cutting edge, and a drill tip. The front end of the drill bit is a conical drill tip, which is connected to the first step. The other end of the first step is connected to the second step. The diameter of the first step is smaller than that of the second step. A chamfered cutting edge is provided between the first step and the second step.

4. The forming bracket knife according to claim 3, characterized in that: The taper of the drill tip is 120 degrees.

5. The forming bracket knife according to claim 4, characterized in that: A chip removal groove is provided between the drill tip and the second step, and the chip removal groove is arranged axially on the circumferential surface of the drill bit.

6. The forming bracket knife according to claim 5, characterized in that: The chamfering blade is mounted on the chamfering bracket by screws. The edge of the chamfering blade opposite to the central blade body is the cutting edge, and the cutting edge forms a 45-degree angle with the radial direction of the main blade body.

7. The forming bracket knife according to claim 6, characterized in that: The diameter of the blade neck of the central blade body is the same as the diameter of the mounting cavity. When the handle of the central blade body is inserted into the mounting hole, the blade neck of the central blade body is correspondingly inserted into the mounting cavity.

8. The forming bracket knife according to claim 7, characterized in that: The core of the main shank is provided with a rear cooling hole, and the core of the central cutter body is also provided with a front cooling hole leading to the drill bit. When the central cutter body is embedded in the main cutter body, the front cooling hole and the rear cooling hole are connected, and the coolant injected from the rear cooling hole can reach the drill bit through the front cooling hole.

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