CN217433144U

CN217433144U - Carbide drill bit of interchangeable cutting head

Info

Publication number: CN217433144U
Application number: CN202221654444.3U
Authority: CN
Inventors: 周金泽
Original assignee: Wenling Zhongren Precision Tools Co ltd
Current assignee: Wenling Zhongren Precision Tools Co ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-09-16
Anticipated expiration: 2032-06-29

Abstract

The utility model provides a carbide drill bit of interchangeable cutting head belongs to cutter technical field. It has solved current drill bit structure as an organic whole and has constituted, needs wholly to change during the change, leads to the problem that replacement cost is high. This carbide drill bit of interchangeable cutting head, including cutting head and the handle of a knife that supplies cutting head demountable installation, the cutting head end extends to the interior blade portion that forms of handle of a knife, the thread groove is seted up outward to blade portion, and install in the handle of a knife through threaded connection's mode, the radial evagination in handle of a knife top has the protruding edge of location, be equipped with a plurality of locating component between protruding edge of location and the blade portion, a plurality of locating component are around protruding edge evenly distributed of location, locating component comprises the cushion of tool setting body axial and radial positioning and the connection briquetting that compresses tightly the cushion. The utility model has the advantages of reduce replacement cost, improve cutting head positioning accuracy and machining precision.

Description

Carbide drill bit of interchangeable cutting head

Technical Field

The utility model belongs to the technical field of the cutter, a drill bit is related to, in particular to carbide drill bit of interchangeable cutting head.

Background

The drill bit is a tool on a drill press and is used to create a hole in a workpiece. The conventional drill comprises a cutting head and a shank, wherein the cutting head is used for drilling a workpiece. The integral construction of the drill bit can cause several disadvantages.

For a small and simple drilling machine, when workers need to drill holes with different sizes, the whole cutter needs to be taken down and replaced; most importantly, when the cutting head of one cutter is seriously worn and needs to be replaced, the whole cutter needs to be abandoned, so that the resource waste of other structures is caused, and the replacement cost and the production cost are increased.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a split type carbide drill bit that cutting head can be changed alone.

The purpose of the utility model can be realized by the following technical proposal: a hard alloy drill bit with a replaceable cutting head is characterized by comprising a cutting head and a tool shank for detachably mounting the cutting head, the tail end of the cutting head extends into the cutter handle to form a cutter body part, a thread groove is arranged outside the cutter body part, and is arranged in the knife handle in a threaded connection mode, the top of the knife handle is radially and outwards protruded with a positioning convex edge, a plurality of positioning components are arranged between the positioning convex edge and the cutter body part and are uniformly distributed around the positioning convex edge, the positioning component consists of cushion blocks for axially and radially positioning the cutter body part and a connecting pressing block for pressing the cushion blocks, a plurality of triangular grooves for installing corresponding positioning components are arranged on the inner wall of the positioning convex edge and between the positioning convex edge and the cutter body part, the connecting pressing block and the cushion block are fixed through an adjusting screw, and the tail end of the adjusting screw is connected into the positioning convex edge.

In the cutting head replaceable hard alloy drill bit, the back of the cushion block is provided with an inclined surface, the front of the cushion block is provided with a positioning surface positioned with the cutter body, the positioning surface is a plane, line-surface positioning is formed between the positioning surface and the cutter body, and the positioning surface is provided with a positioning line L positioned with the cutter body.

In the cutting head replaceable hard alloy drill bit, the front part of the cushion block is also provided with an inclined surface between the top surface and the positioning surface, the inclined surface is provided with a sealing groove, each sealing groove is combined to form a sealing area, the sealing area is internally provided with a sealing ring in a sealing manner, and the sealing ring is supported against each sealing groove in a sealing manner.

In the cutting head replaceable cemented carbide drill, the cutting head is made of cemented carbide.

Compared with the prior art, the cutting head replaceable hard alloy drill bit has the following advantages:

1. the cutting head can be replaced independently without replacing the whole drill, so that the replacement cost and the production cost are reduced;

2. the positioning precision of the cutting head is improved, and the machining precision of the cutting head is further improved.

Drawings

Fig. 1 is a front view of the cemented carbide drill with replaceable cutting head.

Fig. 2 is a schematic sectional structure view of the cemented carbide drill with replaceable cutting head.

Fig. 3 is a schematic perspective view of the cushion block.

In the drawings, 1, a cutting head; 2. a knife handle; 3. a blade portion; 4. positioning the convex edge; 5. cushion blocks; 6. connecting the pressing blocks; 7. a triangular groove; 8. an adjusting screw; 9. positioning the surface; 10. and (5) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the cutting head replaceable hard alloy drill bit comprises a cutting head 1 and a tool holder 2 for detachably mounting the cutting head 1, wherein the tail end of the cutting head 1 extends into the tool holder 2 to form a tool body part 3, thread grooves are formed outside the tool body part 3, the thread grooves are not formed outside the whole tool body part 3 and are mounted in the tool holder 2 in a threaded connection mode, a positioning convex edge 4 is radially protruded out of the top of the tool holder 2, a plurality of positioning assemblies are arranged between the positioning convex edge 4 and the tool body part 3 and uniformly distributed around the positioning convex edge 4, each positioning assembly comprises a cushion block 5 for axially and radially positioning the tool body part 3 and a connecting pressing block 6 for pressing the cushion block 5, a plurality of triangular grooves 7 for mounting the corresponding positioning assemblies are formed in the inner wall of the positioning convex edge 4 and the position between the positioning convex edge and the tool body part 3, the connecting pressing block 6 and the cushion block 5 are fixed through adjusting screws 8, and the tail end of the adjusting screw 8 is connected into the positioning convex edge 4, so that the connecting pressing block 6, the cushion block 5 and the positioning convex edge 4 are connected.

In a further elaboration, the back of the cushion block 5 is provided with an inclined plane, the front of the cushion block 5 is provided with a positioning plane 9 which is positioned with the cutter body part 3, the positioning plane 9 is a plane, line-to-plane positioning is formed between the positioning plane 9 and the cutter body part 3, the positioning plane 9 is provided with a positioning line L which is positioned with the cutter body part 3, in the screwing process of the adjusting bolt, the connecting pressing block 6 is pressed downwards and drives the cushion block 5 to press downwards, the inclined plane of the back of the cushion block 5 moves inwards towards the cutter body part 3 along the groove surface of the triangular groove 7, the positioning plane 9 of the cushion block 5 is attached to the wall surface of the cutter body part 3 to form line-to-plane positioning, and then the drill is positioned in an axial direction and a radial direction with high precision.

Further saying, cushion 5 is anterior and be located and also seted up the inclined plane between top surface and the locating surface 9, the seal groove has been seted up on the inclined plane, each seal groove combination forms a sealing area, the sealing area internal seal is provided with sealing washer 10, and this sealing washer 10 is sealed to lean on each seal groove, in the drilling machine course of working, there is a large amount of coolant liquid, consequently, in order to prevent that the coolant liquid from entering into the screw thread department of cutter body portion 3, cause the rust of screw thread, sealing washer 10 has been installed additional in locating component, a sealed water-proof effects has been formed.

When the cutting head 1 needs to be disassembled, only the adjusting screw 8 needs to be taken out, the positioning force is released, and then the cutter body part 3 is screwed out, the whole drill bit does not need to be taken out from the drilling machine, the cutter handle 2 can be reserved on a tool table of the drilling machine, the cutter body seat is taken out, replacement can be achieved, and the tool structure in the drilling machine does not need to be operated.

Preferably, the cutting head 1 is made of cemented carbide material.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms cutting head 1, tool shank 2, tool body 3, positioning ledge 4, spacer 5, coupling block 6, triangular groove 7, adjusting screw 8, positioning surface 9, sealing ring 10, etc. are used more extensively herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The hard alloy drill bit with the replaceable cutting head is characterized by comprising a cutting head (1) and a cutter handle (2) detachably mounted with the cutting head (1), wherein the tail end of the cutting head (1) extends into the cutter handle (2) to form a cutter body part (3), a thread groove is formed outside the cutter body part (3) and is mounted in the cutter handle (2) in a threaded connection mode, a positioning convex edge (4) is radially protruded out of the top of the cutter handle (2), a plurality of positioning assemblies are arranged between the positioning convex edge (4) and the cutter body part (3), the positioning assemblies are uniformly distributed around the positioning convex edge (4), each positioning assembly comprises a cushion block (5) for axially and radially positioning the cutter body part (3) and a connecting pressing block (6) for pressing the cushion block (5), a plurality of triangular grooves (7) for mounting the corresponding positioning assemblies are formed in the positions between the positioning convex edge (4) and the cutter body part (3), the connecting pressing block (6) and the cushion block (5) are fixed through an adjusting screw (8), and the tail end of the adjusting screw (8) is connected into the positioning convex edge (4).

2. The carbide drill bit with the replaceable cutting head as claimed in claim 1, wherein the back of the spacer (5) is provided with an inclined surface, the front of the spacer (5) is provided with a positioning surface (9) for positioning with the cutter body part (3), the positioning surface (9) is a plane, a line-to-plane positioning is formed between the positioning surface (9) and the cutter body part (3), and the positioning surface (9) is provided with a positioning line L for positioning with the cutter body part (3).

3. The cutting head replaceable cemented carbide drill bit according to claim 1, wherein an inclined surface is also formed in the front part of the spacer (5) between the top surface and the positioning surface (9), a sealing groove is formed in the inclined surface, each sealing groove is combined to form a sealing area, a sealing ring (10) is arranged in the sealing area in a sealing manner, and the sealing ring (10) is in sealing abutment with each sealing groove.

4. A cutting head replaceable cemented carbide drill according to claim 1, characterized in that the cutting head (1) is of cemented carbide material.