Cutter for machining taper hole and opening chamfer

Abstract

The utility model belongs to the technical field of machining, and discloses a cutter for machining a taper hole and an opening chamfer, which comprises a cutter body, a cutter handle part and a cutter head part are respectively arranged at two ends of the cutter body, the radial size of the front end of the cutter head part is smaller than that of the rear end, and the whole cutter head part is conical; two chip grooves are formed in the side wall of the tool bit part in a central symmetry mode along the axis of the tool handle part, reamer blades are detachably and fixedly connected to the front ends of the chip grooves in an embedded mode, a chamfering tool mounting groove is formed in the portion, facing the side wall of the tool body, of the root of the tool bit part in an inclined penetrating mode, and a chamfering tool assembly is detachably mounted in the chamfering tool mounting groove. A traditional chamfering blade is changed into the detachable chamfering tool assembly, the side fixing plane is fixed through the fixing screw, adjustment is conducted from the tail of the chamfering tool assembly through the adjusting screw, and then the chamfering size can be adjusted in a large range. And the cutter is easier to manufacture, the segment difference size is easier to guarantee, the blade is convenient to replace after being abraded, and the cutter grinding cost is greatly reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of machining, in particular to a tool for machining a tapered hole and a chamfered mouth. BACKGROUND

[0002] At present, as the mechanical design level is higher and higher, the technical requirements for machining parts are higher and higher, and various high-precision hole machining exists in the machining process of mechanical parts. Since the hole diameter is high, a hole is usually drilled first, then the hole is chamfered and precisely lathed to meet the high-precision requirement. In order to obtain a high-precision hole, two processes of drilling and lathing are generally required. The function of the drill is to pre-drill the hole, and the function of the lath is to ensure the size tolerance and roughness. Therefore, the tool needs to be frequently replaced in the machining operation, the disassembly and assembly steps are complex, the machining efficiency is reduced, and the machining cost is increased due to the use of multiple tools.

[0003] The existing drill-chamfer-lathe integrated tool, such as the drill-lathe-chamfer integrated tool with the application number CN202021018503.9, can realize the functions of lathing and chamfering by adding a finishing blade and a chamfering blade to the drill. However, when a through hole is machined, the diameter and the chamfering joint are not easy to handle, the step difference is not easy to ensure, in addition, the stress during machining is large, the cutting allowance of the chamfering part is large, thereby causing the tool bit to wear out very quickly, the service life is very poor, and the cost of repairing the integrated tool is large. On the other hand, the tool is easy to shake, the machining effect is poor, and burrs are generated on the workpiece far from the drill penetration surface. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above problems, the application provides a tool for machining a tapered hole and a chamfered mouth.

[0005] The tool for machining a tapered hole and a chamfered mouth provided by the application adopts the following technical scheme:

[0006] The tool for machining a tapered hole and a chamfered mouth comprises a tool body, a tool handle part and a tool head part arranged at two ends of the tool body respectively, the front end of the tool head part is smaller in radial dimension than the rear end, and the tool head part is conical as a whole, two chip removal grooves are centrally symmetrically arranged in the side wall of the tool head part along the axis of the tool handle part, a lath blade is detachably and fixedly connected to the front end of each chip removal groove, a chamfering tool installation groove is obliquely and through arranged in the root of the tool head part towards the side wall of the tool body, a chamfering tool assembly is detachably installed in the chamfering tool installation groove, a fixing hole is arranged in the inside of the chip removal groove and through the chamfering tool installation groove, and a fixing screw is threadedly connected in the fixing hole.

[0007] Further, an adjusting hole is through arranged in the rear end of the chamfering tool installation groove, and an adjusting screw is threadedly connected in the adjusting hole.

[0008] Further, the chamfering cutter assembly comprises a chamfering cutter holder and a chamfering cutter blade, the chamfering cutter holder is cylindrical, and a cutter slot is formed in the chamfering cutter holder in an axial direction.

[0009] Further, the side wall of the chamfering cutter holder has a side fixing plane.

[0010] Further, the front end of the chamfering cutter holder and the chamfering cutter blade is a smooth inclined plane.

[0011] Further, the rear end of the chip removal groove extends to 1 / 2 of the side wall of the cutter body.

[0012] In summary, the present application has at least one of the following beneficial technical effects:

[0013] (1) The chamfering cutter assembly of the present application is detachable, and the chamfering cutter assembly is arranged obliquely, the front end of the chamfering cutter assembly protrudes from the side wall of the cutter head, the side fixing plane is fixed by a fixing screw, and the chamfering cutter assembly is adjusted from the tail by an adjusting screw, so that the chamfering size can be adjusted in a large range, and the adjustable chamfering cutter assembly is easier to manufacture and the step size is easier to ensure.

[0014] (2) The present application separates the reamer blade (i.e. the diameter blade) from the chamfering blade, so that the cutter is less stressed during processing, the processing effect is easier to meet the requirements, the cutter life is greatly improved, the cutter blade is easy to replace after wear, and the cutter grinding cost is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural perspective view of one side of the present application;

[0016] Figure 2 is a structural schematic view of another side of the present application;

[0017] Figure 3 is a side view of the present application;

[0018] Figure 4 is a front end perspective view of the present application;

[0019] Figure 5 is a structural schematic view of the chamfering cutter assembly.

[0020] Explanation of Reference Numerals in the Drawings:

[0021] 1, cutter body; 11, cutter shank; 12, cutter head; 13, chip removal groove; 14, chamfering cutter mounting slot; 15, fixing hole; 16, fixing screw; 17, adjusting hole; 18, adjusting screw; 2, reamer blade; 3, chamfering cutter assembly; 31, chamfering cutter holder; 32, chamfering cutter blade; 33, cutter slot; 34, side fixing plane. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, and not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0023] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Embodiment 1:

[0026] The present application will be further described in detail below with reference to the accompanying drawings.

[0027] The embodiment of the present application discloses a tool for machining tapered hole and chamfering mouth, comprising a tool body 1, the two ends of the tool body 1 are respectively provided with a tool handle part 11 and a tool head part 12, the front end of the tool head part 12 is smaller in radial dimension than the rear end, and the whole is conical, the side wall of the tool head part 12 is centrally symmetrically provided with two chip flutes 13 along the axis of the tool handle part 11, the front end of each chip flute 13 is embedded with a reamer blade 2 which is detachably and fixedly connected, a chamfering cutter mounting groove 14 is obliquely and through provided at the root of the tool head part 12 towards the side wall of the tool body 1, a chamfering cutter assembly 3 is detachably mounted in the chamfering cutter mounting groove 14, a fixing hole 15 is provided through the inside of the chip flute 13 and the chamfering cutter mounting groove 14, a fixing screw 16 is threadedly connected in the fixing hole 15, and the fixing screw 16 is selected from M4 headless screws.

[0028] As a further preferred embodiment of the present application, the rear end of the chamfering tool mounting slot 14 is provided with an adjusting hole 17, and an adjusting screw 18 is threadedly connected in the adjusting hole 17, and the adjusting screw 18 is selected as an M6 headless screw.

[0029] As a further preferred embodiment of the present application, the chamfering tool assembly 3 comprises a chamfering tool holder 31 and a chamfering tool blade 32, the chamfering tool holder 31 is cylindrical, and a tool slot 33 is axially formed in the front end of the chamfering tool holder 31, and the chamfering tool blade 32 is fixedly installed in the tool slot 33.

[0030] As a further preferred embodiment of the present application, the side wall of the chamfering tool holder 31 has a side fixing plane 34.

[0031] As a further preferred embodiment of the present application, the front end of the chamfering tool holder 31 and the chamfering tool blade 32 is a smooth inclined plane.

[0032] As a further preferred embodiment of the present application, the rear end of the chip removal groove 13 extends to 1 / 2 of the side wall of the tool body 1.

[0033] The implementation principle of the tool for machining a tapered hole and a chamfered mouth portion according to the embodiments of the present application is as follows:

[0034] According to the present application, the traditional chamfering blade is changed into a detachable chamfering tool assembly 3, the chamfering tool assembly 3 is obliquely arranged, the front end of the chamfering tool assembly 3 protrudes from the side wall of the tool head portion 12, the side fixing plane 34 is fixed by the fixing screw 16, and the chamfering tool assembly 3 is adjusted from the tail portion of the chamfering tool assembly 3 by the adjusting screw 18, so that the chamfering size can be adjusted in a large range. The adjustable chamfering tool assembly 3 is easier to manufacture, and the step size is easier to guarantee. According to the present application, the reamer blade (i.e. the diameter blade) and the chamfering blade are separated, the tool is subjected to small force during machining, the machining effect is easier to meet the requirements, the tool life is greatly improved, the tool blade is easy to replace after wear, and the tool grinding cost is greatly reduced.

[0035] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A tool for machining a tapered hole and a chamfered mouth portion, comprising a tool body (1), a handle portion (11) and a tool head portion (12) being arranged at two ends of the tool body (1) respectively, characterized in that: The front end radial dimension of the cutter head part (12) is smaller than the rear end radial dimension, which is overall tapered, the side wall of the cutter head part (12) is centrally symmetrically provided with two chip flutes (13) along the axis of the shank part (11), the front ends of the chip flutes (13) are embedded with detachably fixedly connected reamer blades (2), the root of the cutter head part (12) is obliquely and throughly provided with a chamfering cutter installation groove (14) towards the side wall of the cutter body (1), the chamfering cutter installation groove (14) is detachably installed with a chamfering cutter assembly (3), the inside of the chip flute (13) is provided with a fixing hole (15) through the chamfering cutter installation groove (14), and the fixing hole (15) is threadedly connected with a fixing screw (16).

2. A tool for machining a tapered bore and a chamfered mouth portion according to claim 1, characterised in that: The rear end of the chamfering cutter installation groove (14) is throughly provided with an adjusting hole (17), and the adjusting hole (17) is threadedly connected with an adjusting screw (18).

3. The tool according to claim 1, wherein: The chamfering cutter assembly (3) comprises a chamfering cutter holder (31) and a chamfering cutter blade (32), the chamfering cutter holder (31) is cylindrical, the front end of the chamfering cutter holder (31) is axially provided with a cutter groove (33), and the chamfering cutter blade (32) is fixedly installed in the cutter groove (33).

4. A tool for machining a tapered bore and a chamfered mouth portion according to claim 3, characterised in that: The side wall of the chamfering cutter holder (31) has a side fixing plane (34).

5. A tool for machining a tapered bore and a chamfered mouth portion according to claim 4, characterised in that: The front end of the chamfering cutter holder (31) and the chamfering cutter blade (32) is a smooth inclined plane.

6. The tool according to claim 1, wherein: The rear end of the chip flute (13) extends to 1 / 2 of the side wall of the cutter body (1).

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