CN207386652U - A kind of spiral bit - Google Patents

Abstract

The utility model discloses a kind of spiral bits.The device belongs to Machining Technology for Cutting field, a kind of spiral bit, including apex point and bore body, the apex point includes apex angle, major cutting edge, knife face and chisel edge afterwards, the brill body includes land, chip space, the chisel edge is connected with drill bit drill core, the core thickness of the drill bit drill core is with spiral to thickening, the land includes the first main land and the second main land of screw arrangement, chip space is accompanied between the first main land and the second main land, first main land and the second main land surface offer prominent auxiliary-blade respectively, the blade surface of the auxiliary-blade is gradually wide along hand of spiral width.Ability of the gradual thickening rigidity for enhancing drill bit of drill bit drill core with resisting shearing force, effectively reduce trembling in process, auxiliary-blade blade surface is gradually wide along hand of spiral width so that auxiliary-blade has more guiding role in drill bit process, improve the fraising ability of auxiliary-blade, it effectively prevents auxiliary-blade from collapsing damage, improves the service life of spiral bit.

Description

A kind of spiral bit

Technical field

The utility model belongs to Machining Technology for Cutting field, more particularly to a kind of spiral bit.

Background technology

Fluted drill is that the cutter to portal is processed from solid material, and is cutter most widely used in aperture knife tool, fiber crops It is to be relatively fixed the rotary cutting of axis by it with the circular hole instrument of drilling workpiece that flower, which bores, because of the spiral likeness in form of its chip pocket Fried dough twist and gain the name, helicla flute has 2 slots, 3 slots or more multiple-grooved, but most commonly seen with 2 slots, and fluted drill can be clamped in manual, electric Dynamic holding uses on formula boring bar tool or drilling machine, milling machine, lathe or even machining center, drilled material instrument be generally tool steel or Hard alloy.

Existing fluted drill is during the cutting process since drill bit core thickness unanimously usually can be because shaking during the variation of torque It quivers, processing stability is poor, is easy to cause drilling bit breakage, while angle of throat width is unchanged on land during the bit operation, makes Drill bit angle of throat cutting force and fraising power deficiency are obtained, cutting edge easily collapses damage, and parts processing surface roughness is low, guiding role The problems such as difference, processing efficiency is low, and service life is short.

The content of the invention

The utility model aim is to provide a kind of rigidity strong, and guiding role is good, fraising power foot, fried dough twist high in machining efficiency Drill bit.

In order to realize above-mentioned technical purpose, the technical solution that a kind of fluted drill of the utility model uses for：

A kind of spiral bit including apex point and bores body, and the apex point includes apex angle, major cutting edge, rear knife face and chisel edge, described Boring body includes land, chip space, and the chisel edge is connected with drill bit drill core, and the core thickness of the drill bit drill core is with spiral to thickening, institute Stating land includes the first main land and the second main land of screw arrangement, the row of accompanying between the first main land and the second main land Consider slot to be worth doing, the first main land and the second main land surface offer prominent auxiliary-blade respectively, and the auxiliary-blade blade surface is along spiral shell It is gradually wide to revolve direction width.Ability of the gradual thickening rigidity for enhancing drill bit of drill bit drill core with resisting shearing force so that drill bit is more The stabilization added, effectively reduces trembling in process, and the blade surface of auxiliary-blade is gradually wide so that drill bit adds along hand of spiral width Auxiliary-blade has more guiding role during work, and parts processing surface roughness improves, improves the fraising ability of auxiliary-blade, have Effect prevents auxiliary-blade from collapsing damage, improves the service life of spiral bit.

Preferably, the described first main land gradually broadens with the second main margin width along the hand of spiral, the first main land with Second main land is in a center of symmetry on spiral bit pivot.Improve drill bit integral strength and rigidity so that fluted drill The fraising power of head is more sufficient.

Preferably, the main angle of throat head end apex angle is that scope is 118 ° ~ 135 °, and deviation is ± 3 °.Be conducive to spiral bit The machining on top enhances the intensity at top, spiral bit drilling power bigger.

Preferably, for the chip space depth of rebate along spiral to gradually shallow, width of rebate is more than the width of the first main land.Just In the discharge of waste cut materials.

Compared with prior art, the beneficial effects of the utility model are：

Ability of the gradual thickening rigidity for enhancing spiral bit of drill bit drill core with resisting shearing force so that drill bit is more Stablize, effectively reduce trembling in process, the width of auxiliary-blade blade surface is gradually wide so that secondary in spiral bit process Blade has more guiding role, and cutting force bigger, fraising power is more sufficient, and parts processing surface roughness improves, the entirety of auxiliary-blade Intensity improves, and effectively prevents the service life for collapsing damage, improving spiral bit of auxiliary-blade.

Description of the drawings

Fig. 1 is the structure diagram of the utility model；

Fig. 2 is the utility model A portions partial enlarged view.

In figure：1. rake face；2. major cutting edge；Knife face after 3.；4. chisel edge；5. auxiliary-blade；6 blade surfaces；7. minor flank；8. row Consider slot to be worth doing；9. the first main land；10. the second main land；11. apex angle；12. apex point；13. bore body.

Specific embodiment

With reference to the accompanying drawings and detailed description, the utility model is furtherd elucidate, it should be understood that these embodiments are only For illustrating the utility model rather than limitation the scope of the utility model, after the utility model has been read, this field Technical staff falls within the application scope as defined in the appended claims to the modification of the various equivalent forms of the utility model.

A kind of spiral bit as illustrated in fig. 1 and 2 including apex point 12 and bores body 13, and the apex point 12 includes apex angle 11, operator Sword 2, rear knife face 3 and chisel edge 4, the brill body 13 include land, chip space 8, and the chisel edge 4 is connected with drill bit drill core, the brill For the core thickness of head drill core with spiral to thickening, the land includes the first main 9 and second main land 10 of land of screw arrangement, the Chip space 8, first main 9 and second main 10 surface of land of the land difference are accompanied between one main 9 and second main land 10 of land Prominent auxiliary-blade 5 is offered, the blade surface 6 of the auxiliary-blade 5 is gradually wide along hand of spiral width, the first main land 9 and Two main 10 width of land gradually broaden along the hand of spiral, during the first main 9 and second main land 10 of land is rotated on spiral bit The heart is in a center of symmetry, main 2 head end apex angle of angle of throat, 11 scope be 118 ° ~ 135 °, 8 depth of rebate of chip space along spiral to Gradually shallow, width of rebate is more than the width of the first main land 9.

Ability of the gradual thickening rigidity for enhancing spiral bit of drill bit drill core with resisting shearing force so that drill bit is more Stablize, effectively reduce trembling in process, the width of the blade surface 6 of auxiliary-blade 5 is gradually wide so that spiral bit process Middle auxiliary-blade 5 has more guiding role, and cutting force bigger, fraising power is more sufficient, and parts processing surface roughness improves, auxiliary-blade 5 Integral strength improve, effectively prevent the service life for collapsing damage, improving spiral bit of auxiliary-blade 5.

Claims (4)

1. a kind of spiral bit including apex point and bores body, the apex point includes apex angle, major cutting edge, rear knife face and chisel edge, the brill Body includes land, chip space, it is characterised in that：The chisel edge is connected with drill bit drill core, and the core thickness of the drill bit drill core is with spiral To thickening, the land includes the first main land and the second main land of screw arrangement, in the first main land and the second main land Between accompany chip space, the first main land and the second main land surface offer prominent auxiliary-blade, the pair knife respectively The blade surface of sword is gradually wide along hand of spiral width.

2. a kind of spiral bit according to claim 1, it is characterised in that：The first main land and the second main margin width Degree gradually broadens along the hand of spiral, and the first main land is in a center of symmetry on spiral bit pivot with the second main land.

3. a kind of spiral bit according to claim 1, it is characterised in that：The main angle of throat head end apex angle is that scope is 118 ° ~ 135 °, deviation is ± 3 °.

4. a kind of spiral bit according to claim 1, it is characterised in that：The chip space depth of rebate is along spiral to gradually Shallow, width of rebate is more than the width of the first main land.