CN202180238U

CN202180238U - Combined-land fixed-feeding-amount step drill

Info

Publication number: CN202180238U
Application number: CN 201120192325
Authority: CN
Inventors: 王宏嘉
Original assignee: SHANGHAI TEC-SPIRAL ENTERPRISES CO LTD
Current assignee: SHANGHAI TEC-SPIRAL ENTERPRISES CO LTD
Priority date: 2011-06-09
Filing date: 2011-06-09
Publication date: 2012-04-04
Anticipated expiration: 2021-06-09
Also published as: WO2012167448A1

Abstract

The utility model discloses a combined-land fixed-feeding-amount step drill, comprising step-drill cutting lands and multiple steps. The combined-land fixed-feeding-amount step drill is characterized in that the steps have axial rear angles and/or radial rear angles and together with the lands therebehind form a combined land, which is located at a different level from a cutting edge. The combined-land fixed-feeding-amount step drill disclosed by the utility model not only prevents the friction between a rear cutter surface and a machined surface, but also, through the combination of the rear lands, eliminates the 'cutter rolling' phenomenon which may be caused due to too great the depth of cut (axial feeding amount) as the force applied manually is not uniform.

Description

Compound land is decided amount of feeding step drill

Technical field

The utility model discloses step drill, especially a kind of compound land is decided amount of feeding step drill, belongs to the metal cutting manufacture field.

Background technology

Step drill is the machining tool a kind of commonly used of metal processing cutting, the pagoda shape drill bit of being made up of a plurality of steps of different-diameter, difference (or identical) length.Because when holing on the tube wall of thin plate and pipe fitting (pipe and square tube) with step drill is in the workplace away from other Metal Cutting Machine Tools such as drilling machines mostly; Use electric hand tool; Carry out manually-operated; Manual work firmly comes and go, so this just requires step drill to have following two technical characteristics: 1. cut sharp, laborsaving; 2. working angles is steady, operates, grips easily.

According to sharp, the labour-saving requirement of drilling palpus, step drill should adopt bigger anterior angle and relief angle.In such cases, can cause step drill often " lipper ".Under the effect of higher rotation speed and torsional moment, be easy to cause spraining of operator's arm, damage of processed hole or surface quality are coarse.

Steady according to the drilling working angles, operate, grip easy requirement, step drill should adopt less anterior angle and relief angle.In such cases, smear metal was difficult to discharge when less anterior angle made the step drill drilling; Less relief angle makes the back knife face of cutting portion and machined surface contact-making surface bigger, will produce following situation:

A, the sassafras that rubs are more serious, thereby the cutting heat that produces is just big, and heat is difficult for distributing;

B, make the burning of step drill cutting edge and influence cut, often could continue to process after the cutter cooling is waited in processing just needing behind the several holes of processing to suspend, efficient is lower;

If the untimely time-out in c heating back will cause the work hardening of surface to be machined, in addition may when serious

With cutter and workpiece to be machined scaling loss together even scrap;

D, axial cutting force are bigger, are difficult for the incision workpiece, and be artificial firmly too big.

Existing technical scheme, all can't satisfy simultaneously 1. cut sharp, laborsaving; 2. working angles is steady, operates, grips easily these two kinds of needs, only can satisfy 1. or during 2. a kind of purpose, be difficult to overcome above-mentioned pointed defective.

The compound land of the utility model is decided amount of feeding step drill and has then been overcome the problems referred to above.

Summary of the invention

The utility model discloses compound land and decide amount of feeding step drill; Overcome defective of the prior art; Sharp, the labour-saving that had not only solved the step drill drilling require: but also eliminated because manual firmly inhomogeneous, caused the excessive and phenomenon of " lipper " of bite (axial feed amount).

In the utility model, described technical words is conspicuous to those skilled in the art.In the utility model, used vocabulary can be with reference to following explanation:

The pagoda shape drill bit of step drill-form by a plurality of steps of different-diameter, difference (or identical) length.

Decide the amount of feeding-by the decision of the design parameter of step drill, have certain drilling depth of cut, both during drilling, its back engagement of the cutting edge was invariable.

Cutting edge-be step drill the cutting position.

The compound land of the utility model is decided amount of feeding step drill; Comprise step drill cutting land and multistage step; It is characterized in that said step is provided with axial relief angle and/or radial clearance angle, form compound land with its land afterwards, there are drop in said compound land and cutting edge.

In the utility model; Said step is provided with axial relief angle and/or radial clearance angle and also can be regarded as the angle part (angle land) that the back knife face is provided with axial relief angle and/or radial clearance angle, step drill land and be provided with axial relief angle and/or radial clearance angle; To those skilled in the art; Above-mentioned different address all is used in reference to the same position of step drill, in the essence invention spirit of the utility model, uses the different techniques term still to belong to the protection domain of the utility model.

In the utility model, the shape of said land and type do not receive special restriction, as long as feasible step drill land all is covered by the utility model in this area.Described land can be plane land, circular arc land, multistage circular arc sword quilt, and promptly said step is provided with axial relief angle and/or radial clearance angle, is formed compound land with plane land or circular arc land or multistage circular arc sword after it; Sword in preferred the utility model is the circular arc land, and promptly said step is provided with axial relief angle and/or radial clearance angle, forms compound land with its circular arc land afterwards.

In the utility model, use " and/or " expression both can be step be provided with in axial relief angle, the radial clearance angle the two one of, also can be that step is provided with axial relief angle and radial clearance angle, preferably step is provided with axial relief angle and radial clearance angle.

In the utility model; It will be appreciated by those skilled in the art that the described land that is compounded to form axially, the drop of radially designing certain value with cutting edge and aforesaid axial relief angle, radial clearance angle be corresponding, the land that promptly is compounded to form is axially, radially be provided with certain drop with cutting edge.

On the basis of the above, the compound land of the utility model is decided amount of feeding step drill and is comprised also further with compound land and decide the shank that amount of feeding step drill drill body is connected that promptly cutter is in order to the part of clamping and transferring power.Any this area can with handle all can be applicable to the utility model, what preferably be used for the utility model is six sides band locating slot handle.

On the basis of the above, the compound land of the utility model is decided amount of feeding step drill and is further comprised the appearance bits groove that is used to get rid of the smear metal that the drill body cutting produces, and described appearance bits groove can be one, also can be a plurality of; Can be angle shape, also can be any other available shape.

The compound land of the utility model is decided amount of feeding step drill when Drilling Operations, and its axial feeding (bite) can adopt any available numerical value as required, and preferably its axial feeding (bite) keeps a definite value.

Compare with existing step drill; The compound land of the utility model is decided the sassafras that rubs that amount of feeding step drill had both been avoided back knife face and surface to be machined; Pass through the compound land of back segment simultaneously again; Eliminated because manual firmly inhomogeneous, caused the excessive and phenomenon of " lipper " of bite (axial feed amount), thereby have following remarkable technical advantage:

More steady when 1, artificial electric hand tool is holed, guaranteed the boring processing under the safety prerequisite; Avoid the generation of equipment and personal injury;

2, through design different cutters parameter, can control the cutter cutting amount of feeding in use, guarantee crudy;

3, reduced cutter in use, the scrapping of artificial infringement and workpiece.

Description of drawings

Fig. 1 is the structural representation of the quantitative step drill of the compound back of the body of the utility model;

Fig. 2 is the cross section zoomed-in view of the quantitative step drill of the compound back of the body of the utility model;

Fig. 3 is Fig. 2 I place zoomed-in view, shows radial clearance angle α j and drop δ j;

Fig. 4 is Fig. 1 II place zoomed-in view, shows axial relief angle α z and drop δ z.

The specific embodiment

Following embodiment only is used to explain a kind of feasible embodiment of the utility model; And the only available following proposal of unrestricted the utility model realizes; Those skilled in the art carry out any feasible conversion change, equivalents etc. according to the utility model invention spirit, all belong to the utility model protection domain.

Fig. 1 discloses the structure of the quantitative step drill of the compound back of the body of the utility model, comprises six sides band locating slot handle 1, drill body 2; Hold bits groove 3, cutting edge 4, angle land (being the step drill step part) 5; Circular arc land 6, six sides band locating slot handle 1 connects and drill body 2, and angle land (being the step drill step part) 5 is provided with radially, axial angle; Form compound land with circular arc land 6, drop axially, is radially arranged between compound land and the cutting edge 4.

Fig. 2 is the sectional view of Fig. 1, has showed that angle land (being the step drill step part) 5 is provided with radial angle and circular arc land 6 is formed compound land, between compound land and the cutting edge 4 drop is arranged radially.

Fig. 3 is the partial enlarged drawing of Fig. 2, has showed the radial clearance angle α j 51 of angle land (being the step drill step part) 5 with circular arc land 6, the drop δ j 52 between compound land and the cutting edge 4.

Fig. 4 is the partial enlarged drawing of II among Fig. 1; Showed radially axial (being the step drill step part) 5b and the circular arc land axial relief angle α z 53 of 6a, circular arc land 6b radially of (being the step drill step part) 5a, angle land of angle land, the drop δ z 54 between compound land and the cutting edge 4.

Claims

1. compound land is decided amount of feeding step drill, comprises step drill cutting land and multistage step, it is characterized in that said step is provided with axial relief angle and/or radial clearance angle, forms compound land with its land afterwards, and there are drop in said compound land and cutting edge.

2. decide amount of feeding step drill according to the compound land of claim 1, it is characterized in that said step is provided with axial relief angle and/or radial clearance angle, form compound land with its plane land afterwards.

3. decide amount of feeding step drill according to the compound land of claim 1, it is characterized in that said step is provided with axial relief angle and/or radial clearance angle, form compound land with its circular arc land afterwards.

4. decide amount of feeding step drill according to the compound land of claim 1, it is characterized in that said step is provided with axial relief angle and/or radial clearance angle, form compound land with its multistage circular arc land afterwards.

5. compound land according to claim 1 is decided amount of feeding step drill, also comprises with said compound land deciding the shank that amount of feeding step drill drill body is connected.

6. compound land according to claim 5 is decided amount of feeding step drill, it is characterized in that said shank is six a sides band locating slot handle.

7. compound land according to claim 1 is decided amount of feeding step drill, it is characterized in that also comprising being used to get rid of the appearance bits groove that drill body cuts the smear metal of generation.

8. compound land according to claim 7 is decided amount of feeding step drill, it is characterized in that said appearance bits groove is a plurality of.