CN216912257U - Four-edge ball head taper milling cutter for machining water tank at end part of drill bit - Google Patents

Abstract

The utility model discloses a four-edge ball head taper milling cutter for machining a water tank at the end part of a drill bit, which comprises a cutter handle part, wherein the cutter handle part is connected with a cutter taper part, the cutter taper part is fixedly connected with a cutter ball head part, the center of the cutter ball head part is provided with a cutter edge diameter, one side of the cutter edge diameter is provided with a cutter end tooth part, the cutter end tooth part is connected with the radius of the cutter ball head, a cutter groove-shaped part is arranged on the cutter taper part, one side of the cutter groove-shaped part is provided with a cutter peripheral tooth first relief angle, and one side of the cutter peripheral tooth first relief angle is connected with a cutter peripheral tooth second relief angle. The utility model can finish the processing of the water tank at one time, reduce the cost, ensure that the connection part of the plane with the angle at the upper part of the water tank and the cambered surface at the bottom of the water tank can reach a tangent state, avoid inflection points, and ensure smooth connection, thereby improving the quality and the precision of a drill bit product, improving the flowing speed of a water body, accelerating slag discharge, and reducing the cost by repeatedly grinding a cutter.

Description

Four-edge ball head taper milling cutter for machining water tank at end part of drill bit

Technical Field

The utility model relates to the technical field of milling cutters, in particular to a four-edge ball head taper milling cutter for machining a water tank at the end part of a drill bit.

Background

When the drill bit is used, the water tank at the end part of the drill bit adopts high-pressure water, the water is led to the end part of the drill bit through the water hole of the drill bit, and the water led to the end part flows along the water tank at the end part of the drill bit to play roles of cooling, lubricating and flushing slag. Therefore, there are certain requirements for the shape and surface profile of the water tank. The current common structure is that the upper part of the water tank is a plane with a certain angle, and the bottom of the water tank is a cambered surface. The upper part of the water tank adopts a plane with an angle, which is beneficial to the water to flow to the end part of the drill bit more quickly; the bottom adopts a spherical surface, which is beneficial to the flow of water, reduces resistance and quickly discharges slag.

At present, a drill bit end water tank processing mode generally adopts a blade to process an angled plane at the upper part of a water outlet tank, and then adopts a ball-end milling cutter to mill a cambered surface at the bottom. By adopting the mode, firstly, cutter separation processing is carried out, the efficiency is lower, secondly, the blade cannot be ground, the cost is higher, thirdly, the cutter processing is carried out on the upper part of the water tank and the bottom of the water tank, and the connection point inevitably has an inflection point, so that the connection point is not smooth, the water body flow is influenced during the use, and the slag discharge is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: in order to solve the problems, the four-edge ball head taper milling cutter is provided for machining the water tank at the end part of the drill bit.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the four-edge ball head taper milling cutter comprises a cutter handle part, wherein the cutter handle part is connected with a cutter taper part, the cutter taper part is fixedly connected with a cutter ball head part, the cutter ball head part is provided with a cutter edge diameter, a cutter end tooth part is arranged on one side of the cutter edge diameter, the cutter end tooth part is connected with a cutter ball head radius, a cutter groove type part is arranged on the cutter taper part, a cutter peripheral tooth first relief angle is arranged on one side of the cutter groove type part, and a cutter peripheral tooth second relief angle is connected on one side of the cutter peripheral tooth first relief angle.

Preferably, the cutter end tooth parts are four, and the four cutter end tooth parts are arranged on the cutter ball head part in a centrosymmetric mode.

Preferably, the plane included angle between the extension line of the first back angle of the peripheral teeth of the cutter and the central line of the handle of the cutter is a cutter groove helical angle, and the angle of the cutter groove helical angle is 30 degrees.

Preferably, the included angle formed by the horizontal line of the tangent point of the spherical head part of the cutter and the first back angle of the peripheral teeth of the cutter and the connecting line of the tangent point and the handle part of the cutter is a cutter taper angle which is not more than 10 degrees.

Preferably, the number of the tool groove-shaped parts is four, and the four tool groove-shaped parts are uniformly spirally and circularly arranged on the tool taper part.

Preferably, a cutter circumferential tooth first clearance angle and a cutter circumferential tooth second clearance angle are arranged between the cutter groove-shaped parts.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. this application can reach tangent state with the department of meeting of bottom of water tank cambered surface through basin upper portion area angle plane, avoids the flex point, and the rounding off that meets, and then improves bore bit product quality and precision, and basin upper portion area angle plane and bottom of water tank cambered surface one shot forming avoid dividing the problem that efficiency and contact that sword processing brought have the flex point.

2. This application is through adopting cutter tapering part for the repeated coping of cutter, reduce cost, this cutter more than be applicable to bore bit basin processing, as long as accord with this work piece structure processing requirement, all can adopt this structure, and the structure has the practicality.

Drawings

Fig. 1 shows a front view of a milling cutter according to an embodiment of the present invention;

fig. 2 shows a schematic structural view of a milling cutter tool edge diameter looking down according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram illustrating a cross-section of a milling tool machining part according to an embodiment of the present invention.

Illustration of the drawings:

1. the diameter of the cutter edge; 2. a cutter bulb part; 3. a cutter taper portion; 4. a cutter end tooth portion; 5. radius of the cutter ball head; 6. a cutter pocket section; 7. the circumference of the cutter is a clearance angle; 8. a second relief angle of the peripheral teeth of the cutter; 9. a tool shank.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution:

the utility model provides a four sword bulb tapering milling cutter for processing of bore bit tip basin, including cutter stalk portion 9, cutter stalk portion 9 is connected with cutter tapering part 3, 3 fixedly connected with cutter bulb parts 2 of cutter tapering part, cutter bulb parts 2 center is equipped with cutter sword footpath 1, 1 one side in cutter sword footpath is provided with cutter end tooth part 4, cutter end tooth part 4 is connected with cutter bulb radius 5, cutter cell type part 6 has been seted up on the cutter tapering part 3, 6 one sides in cutter cell type part are provided with cutter all-tooth relief angle 7, 7 one side in cutter all-tooth relief angle is connected with cutter all-tooth relief angle 8. The cutter end tooth parts 4 are provided with four, and the four cutter end tooth parts 4 are arranged on the cutter ball head part 2 in a centrosymmetric manner. The plane included angle between the extension line of the cutter peripheral tooth first relief angle 7 and the central line of the cutter handle part 9 is a cutter groove helical angle, and the cutter groove helical angle is 30 degrees. The included angle formed by the horizontal line of the tangent point of the cutter ball head part 2 and the cutter peripheral tooth-back angle 7 and the connecting line of the tangent point and the cutter handle part 9 is a cutter taper angle which is not more than 10 degrees. Four cutter groove-shaped parts 6 are arranged, and the four cutter groove-shaped parts 6 are uniformly spirally and annularly arranged on the cutter taper part 3. A cutter peripheral tooth primary relief angle 7 and a cutter peripheral tooth secondary relief angle 8 are provided between the cutter groove-shaped portions 6.

Specifically, as shown in fig. 1, a four-edged ball head taper milling cutter for processing a water tank at the end of a drill bit, including a cutter handle part 9, the cutter handle part 9 is connected with a cutter taper part 3, the cutter taper part 3 is fixedly connected with a cutter ball head part 2, the center of the cutter ball head part 2 is provided with a cutter edge diameter 1, the cutter edge diameter 1 one side is provided with a cutter end tooth part 4, the cutter end tooth part 4 is connected with a cutter ball head radius 5, a cutter groove type part 6 is arranged on the cutter taper part 3, one side of the cutter groove type part 6 is provided with a cutter peripheral tooth first relief angle 7, one side of the cutter peripheral tooth first relief angle 7 is connected with a cutter peripheral tooth second relief angle 8, an angle plane at the upper part of the water tank and a cambered surface at the bottom of the water tank are formed by one-time processing, and the problems of inflection points existing in efficiency and connection points caused by cutter dividing processing are avoided.

Specifically, as shown in fig. 2, four cutter end tooth portions 4 are provided, and the four cutter end tooth portions 4 are arranged on the cutter head portion 2 in a centrosymmetric manner. The plane included angle between the extension line of the cutter peripheral tooth first relief angle 7 and the central line of the cutter handle part 9 is a cutter groove helical angle, and the cutter groove helical angle is 30 degrees. The included angle that tangent point horizontal line and tangent point and the 9 lines of cutter stalk portion of cutter bulb part 2 and cutter week tooth back angle 7 formed is cutter tapering angle, and cutter tapering angle is not more than 10, adopts the four sword structure, can effectively reduce per tooth cutting output, and stability when improving cutter life-span and use adopts 30 cutter slot helical angles, compares in other 40 bulb milling cutters, can improve the cutter rigidity, avoids disconnected sword or the condition of collapsing and lacking.

Specifically, as shown in fig. 1, four tool groove-shaped portions 6 are provided, and the four tool groove-shaped portions 6 are uniformly spirally arranged around the tool taper portion 3. Be provided with cutter week tooth clearance angle 7 and cutter week tooth clearance angle 8 between the cutter cell type part 6, the cutter adopts the design of week tooth clearance angle, and cutter week tooth clearance angle 7 adopts 10 ~ 14 design forms, compares traditional milling cutter 5 ~ 9 design, has improved the cutting ability of week tooth, and cutter week tooth is more sharp.

In summary, the four-edged ball-end taper milling cutter for machining a water tank at the end of a drill bit provided by the embodiment is shown in the drawing, wherein fig. 3 is a cross-sectional view of a machined part after molding, in the drawing, a part a is a smooth tangent part of a taper part and a spherical part, a part B is a spherical surface, and a part C is a plane with an angle at the upper part, the taper part 3 of the cutter can be designed into a taper with an angle of 0-10 degrees according to the product requirement, and is suitable for the requirement of different angles at the upper part of the water tank, the thickness of the core of the cutter is designed according to a 60-70% large core thickness structure, compared with a conventional 55-65% core thickness design, the rigidity of the cutter is improved, the cutter is prevented from being broken due to vibration during use, the cutter can be repeatedly ground, and the applicable cost is reduced.

The previous description of the embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. The utility model provides a four sword bulb taper milling cutter for processing of bore bit tip basin, includes cutter stalk portion (9), its characterized in that, cutter stalk portion (9) are connected with cutter tapering part (3), cutter tapering part (3) fixedly connected with cutter bulb portion (2), cutter bulb portion (2) center is equipped with cutter sword footpath (1), cutter sword footpath (1) one side is provided with cutter end tooth part (4), cutter end tooth part (4) are connected with cutter bulb radius (5), cutter cell type part (6) have been seted up on cutter tapering part (3), cutter cell type part (6) one side is provided with cutter week tooth first relief angle (7), cutter week tooth first relief angle (7) one side is connected with cutter week tooth second relief angle (8).

2. A four-edged ball nose taper milling cutter for drill bit end water channel machining according to claim 1, characterized in that the tool end tooth portions (4) are provided in four, four of the tool end tooth portions (4) being arranged centrally symmetrically in the tool ball nose portion (2).

3. The four-edged ball-nose taper milling cutter for drill bit end water groove machining according to claim 2, characterized in that the plane angle between the extension line of the tool peripheral tooth-clearance angle (7) and the center line of the tool shank (9) is a tool flute helix angle, and the tool flute helix angle is 30 °.

4. A four-edged ball-nose taper milling cutter for water channel machining of drill bit ends according to claim 3, characterized in that the horizontal line of the tangent point of the tool ball-nose portion (2) to the tool peripheral tooth-clearance angle (7) and the angle formed by the tangent point and the line of the tool shank portion (9) are tool taper angles, which are not more than 10 °.

5. The four-edged ball nose taper milling cutter for water tank machining of drill bit ends as claimed in claim 4, characterized in that four tool groove-shaped portions (6) are provided, four tool groove-shaped portions (6) being uniformly helically wound around the tool taper portion (3).

6. A four-edged ball-nose taper milling cutter for water channel machining of drill bit ends according to claim 5, characterized in that a cutter peripheral tooth-one clearance angle (7) and a cutter peripheral tooth-two clearance angle (8) are provided between the cutter groove-shaped portions (6).

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