CN216541015U - A double incision countersinking compound drill - Google Patents

Abstract

The utility model discloses a double-notch countersink composite drill which comprises a cylindrical tool shank part, wherein the front end of the tool shank part is integrally provided with a front stop block, a tool bit part is fixedly arranged at the front end of the front stop block, the tool bit part, the front stop block and the tool shank part are coaxially arranged, the tool bit part is divided into a drilling tool and a countersink tool, a front end core is an internal supporting part of the drilling tool, the front end core is of a solid cylindrical structure, and a rear end core is an internal supporting part of the countersink tool. This compound brill of two incisions countersink adopts neotype structural design for the device utilizes the cutting force that produces when drilling and countersink can effectively be reduced in the in-process that uses between drill bit angle and the countersink angle, especially axial cutting force, and alleviates the wearing and tearing of cutter, thereby the life and the work efficiency of obvious improvement cutter reduce the unnecessary energy consumption and reduce use cost when using.

Description

A double incision countersinking compound drill

technical field

The utility model relates to the technical field of compound drills, in particular to a double-notch countersinking compound drill.

Background technique

The compound drill is a kind of tool that combines a drill and a countersink. It is widely used in the field of machining. The front-end drill is used to drill the workpiece, and then the back-end countersink is used to invert the top of the hole. angle, this process can be done in one operation.

In the prior art, the Chinese patent with the authorization announcement number CN200981131U discloses a drill-spotting compound milling cutter, which includes a tool tip, a cutting edge, a chip flute, a tool neck and a shank. The tool tip is a drill tip, and the cutting edge portion is composed of a drill rod edge portion and a milling cutter edge portion with a diameter larger than the secondary cutting edge of the drill cutter. The secondary cutting edge of the drill rod and the milling cutter cutting edge are on the same helix. , there is an undercut between the drill rod and the end face of the milling cutter. For the milling cutter, the tip angle of the end face of the milling cutter is made R0.5 to 1; the width of the chip removal groove from the end face of the milling cutter to the neck of the cutter is larger than the width of the drill pipe chip removal groove, and the depth is Starting from the end face of the milling cutter, it gradually becomes shallower in the direction of the milling cutter. The composite drilling and countersinking cutter related to the utility model can complete the two steps of drilling, countersinking or milling of the stepped bolt pressing countersink at one time. It can save processing time, prolong the service life of tools and improve the manufacturing accuracy of parts.

However, in actual use, the tool has a large cutting force in the process of rotary machining, especially the axial cutting force, which makes the tool wear larger, which ultimately affects the overall service life of the tool and increases the cost of use.

Utility model content

The purpose of this utility model is to provide a double-notch countersinking compound drill, so as to solve the problem in the above-mentioned background art that the increased cutting force when the tool is working causes serious wear and affects the service life.

In order to achieve the above-mentioned purpose, the present utility model provides the following technical solutions: a double-notch countersinking compound drill, comprising a shank part with a cylindrical structure, the front end of the shank part is integrally provided with a front stopper, and also includes:

The cutter head part is fixedly arranged at the front end of the front stopper, the cutter head part is coaxially installed with the front stopper and the cutter handle part, and the cutter head part is divided into two parts: a drill cutter and a countersink. ;

The front-end core is the inner support part of the drill, and the front-end core is a solid cylindrical structure;

The rear end core is the inner support part of the countersink, and the front end core and the rear end core are integrally processed and formed.

Preferably, there is an incremental stepped structure between the drill and the countersink, and two of the drills and the countersink are symmetrically arranged, and the same piece of material is processed into a drill and a countersink. The composite tool can use the countersink to synchronously perform the countersinking operation after the drilling is performed during processing, thereby reducing the processing operation steps and improving the efficiency.

Preferably, a helical chip groove is provided between the drill and the countersink, and the positions of the two chip grooves correspond to each other, and the chips generated when the tool part rotates to process the workpiece It will enter the inside of the chip pocket, and then enter the corresponding countersinking hole from the chip pocketing hole in the drill, and finally discharge it, so as to avoid the impact of the chips generated by the drilling tool on the subsequent countersinking.

Preferably, the diameter of the front-end core is 3.5mm, and the diameter of the rear-end core is 6mm. The overall diameter of the drill is smaller than that of the countersink, so that the countersink can be used for countersinking after drilling.

Preferably, the depth of the drill is 0.5mm and the rake angle is 10°, and the depth of the countersink is 1mm and the rake angle is 11°, and the drill and the countersink are of a double-helix internal cooling structure, The double-helix internal cooling structure enables the tool to be quickly cooled during the machining process, so as to avoid damage to the tool caused by excessive temperature and affect the machining accuracy.

Preferably, the radius of the chip flute is 0.1mm, the width of the arc edge of the drill is 0.75mm, and the width of the chisel edge of the drill is 0.18mm, and the overall depth and rake angle of the drill and the countersink are specified. , the width of the arc edge and the width of the chisel edge can reduce the axial cutting force in the process of use, and reduce the wear in the process, so as to extend the overall service life and save the use cost.

Compared with the prior art, the beneficial effect of the present utility model is that: the double-notch countersinking compound drill adopts a novel structural design, so that the device can effectively utilize the cooperation between the angle of the drill and the angle of the countersink during use. Reduce the cutting force, especially the axial cutting force during drilling and countersinking, and reduce the wear of the tool, thereby significantly improving the service life and work efficiency of the tool, reducing unnecessary energy consumption and reducing the cost of use. , and its specific contents are as follows:

1. The use of the drill and the countersink, which are integrally processed from the same material, improves the overall strength between the drill and the countersink and reduces the post-assembly process. The matching between the diameter and the angle between the knife and the countersink (the overall angle is small), so that the generated axial cutting force is small, and the wear in the process is reduced, and finally the purpose of improving the service life is achieved.

2. The shank part, the front stopper and the chip groove are used together. When in use, the tool shank part can be used to clamp the tool as a whole, and then the chip can be used when rotating the workpiece. The grooves divert the debris, allowing drilling and countersinking to work properly.

Description of drawings

Fig. 1 is the front view sectional structure schematic diagram of the utility model;

FIG. 2 is a schematic view of the side view sectional structure of the drill of the present utility model;

FIG. 3 is a schematic view of the side sectional structure of the countersinking knife of the present invention;

Fig. 4 is the front view structure schematic diagram of the cutter head part of the utility model;

FIG. 5 is a schematic side view of the structure of the utility model.

In the figure: 1. Tool handle part; 2. Front stop; 3. Tool head part; 301. Drilling tool; 302. Countersinking tool; 4. Front-end core; 5. Back-end core;

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIGS. 1-5 , the present utility model provides a technical solution: a double-notch countersinking compound drill, comprising a shank part 1 having a cylindrical structure, and a front stopper 2 is integrally provided at the front end of the shank part 1 ,Also includes:

The cutter head part 3 is fixedly arranged at the front end of the front stopper 2;

The front-end core 4 is the inner support part of the drill 301, and the front-end core 4 is a solid cylindrical structure;

The rear end core 5 is the inner support part of the countersink 302, and the front end core 4 and the rear end core 5 are integrally processed and formed.

The drill 301 and the countersink 302 are in an incremental stepped structure, and two drills 301 and 302 are symmetrically arranged, and a helical chip flute is arranged between the drill 301 and the countersink 302 6, and the positions of the two chip flutes 6 correspond to each other.

When using the device, the tool can be installed on the tool as a whole by using the rear shank part 1. During the machining of the workpiece, the drill 301 is first used to enter the workpiece for drilling operation, and the drill 301 completely enters the workpiece. Afterwards, the countersinking tool 302 is in contact with the hole that has just been drilled in the workpiece, so that the countersinking operation is performed again, so that two operations of countersinking of the drilled hole can be completed at the same time in one processing, which simplifies the overall steps of machining the workpiece, and rotates as a whole at the cutter head part 3 The chips generated in the process of machining enter the inside of the chip pocket 6, and the chips inside the chip pocket 6 on the drill 301 can smoothly enter the chip pocket 6 at the position of the countersink 302 and finally be discharged, so as to avoid the front-end debris from being damaged. Subsequent countersinking operations have an impact.

The diameter of the front-end core 4 is 3.5mm, and the diameter of the rear-end core 5 is 6mm. The countersink 302 has a double-helix internal cooling structure, the radius of the chip flute 6 is 0.1mm, the width of the arc edge of the drill 301 is 0.75mm, and the width of the chisel edge of the drill 301 is 0.18mm.

In the process of machining, the use of the cooperation between the widths and angles of the tool head part 3 can minimize the axial cutting force generated in the process on the basis of ensuring normal machining, thereby improving the overall machining accuracy of the tool, and each A reasonable combination of parameters can reduce the friction loss between the tool and the workpiece during use, thereby prolonging the service life of the tool, so that the tool can improve the processing efficiency while reducing the use cost.

Working principle: When using this device, according to the structure shown in Fig. 1-Fig. 5, firstly use the drill 301 to enter the inside of the workpiece to perform the drilling operation. contact, so that the countersinking operation is performed again, so that two operations of countersinking and countersinking can be completed at the same time in one processing, which simplifies the overall steps of workpiece processing, and the chips generated during the integral rotary processing of the cutter head part 3 enter the set Inside the chip flute 6, and the chips inside the chip flute 6 on the drill 301 can smoothly enter the chip flute 6 at the position of the countersink 302 and finally be discharged, and the axial cutting force can be reduced during the machining process, thereby improving the cutting tool. The accuracy of the overall processing and the reasonable combination of parameters can reduce the friction loss between the tool and the workpiece during use, thereby prolonging the service life of the tool, so that the tool can reduce the cost of use and improve the processing efficiency. This is the The working principle of the double-cut countersinking compound drill.

The content not described in detail in this specification belongs to the prior art known to those skilled in the art. It should be understood that the terms "center", "longitudinal", "horizontal", "front", "rear" and "left" , "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, only The simplified description for the convenience of describing the present invention does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operate for a specific orientation, and thus should not be construed as a limitation on the protection content of the present invention.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides a compound brill of double incision ream face, includes by the handle of a knife part that is the cylinder structure, handle of a knife part front end integration is provided with positive stop, its characterized in that still includes:

the tool bit part is fixedly arranged at the front end of the front stop block, the tool bit part, the front stop block and the tool shank part are coaxially arranged, and the tool bit part is divided into a drilling tool and a countersink;

the front end core is an internal supporting part of the drill cutter and is of a solid cylindrical structure;

the rear end core is the supporting part inside the countersink, and the front end core and the rear end core are integrally machined and molded.

2. The double-cut spot-facing composite drill according to claim 1, characterized in that: the drill bit with be the incremental type echelonment structure between the countersink, just the drill bit with the countersink all symmetry is provided with 2.

3. The double-cut spot-facing composite drill according to claim 2, characterized in that: the drill bit with all be provided with between the countersink and be spiral helicine chip groove, and two the chip groove position corresponds each other.

4. The double-cut spot-facing composite drill according to claim 1, characterized in that: the front end core diameter is 3.5mm, and the rear end core diameter is 6 mm.

5. The double-cut spot-facing composite drill according to claim 1, characterized in that: the drill bit depth of sounding is 10 for 0.5mm anterior angle, just the countersink depth of sounding is 11 for 1mm anterior angle, and the drill bit with the countersink is double helix inner cooling structure.

6. The double-cut spot-facing composite drill according to claim 3, wherein: the radius of the chip groove is 0.1mm, the width of the circular arc edge of the drill is 0.75mm, and the width of the chisel edge is 0.18 mm.

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