CN209385995U - A kind of hard alloy bar with hole cold in spiral - Google Patents

Abstract

The utility model discloses a kind of hard alloy bars with hole cold in spiral, including round barred body；The cold hole in the spiral shape at the both ends of round barred body is equipped in the axis direction of round barred body；On the circumferential surface of round barred body, equipped with a plurality of parallel spiral groove, and the cross sectional shape of spiral groove be it is trapezoidal, the groove width of each spiral groove is identical, and trapezoidal helical tooth is constituted between two adjacent trapezoid spiral grooves, and the facewidth of each helical tooth is also identical；The groove width of the spiral groove is 1~4 times of the facewidth of helical tooth；In the circumferential direction of round barred body, being additionally provided with a section is the trapezoidal narrow tooth of spiral, and the facewidth of the narrow tooth of spiral is the 1/4~3/4 of the facewidth of helical tooth.The utility model can either improve mouldability, provide enough compacting driving forces, improve screw drive efficiency；Compacting uniform force can be improved again, improve compacting deformation.

Description

A kind of hard alloy bar with hole cold in spiral

Technical field

The utility model relates to hard alloy bar processing technique fields, more particularly to a kind of with the hard of hole cold in spiral Matter alloy bar material.

Background technique

Hard alloy is produced with powder metallurgy process, the combination being made of refractory metal compound and binding metal Material, wearability height high with hardness, the good advantage of heat resistance are widely used in Milling Process field.Hard alloy bar Material is a kind of hard alloy for being fabricated to stick, has stable mechanical performance, is easy to weld, high-wearing feature and high-impact The characteristics of, it is widely used in processing various cutters.As rapid industrial development needs, for hard alloy bar product consumption Also it is continuously increased.It is one of type of hard alloy bar with hole cold in spiral bar in hard alloy bar, it can Using the interior type of cooling, cooling velocity and chip removal speed can be accelerated under the action of certain pressure coolant liquid or lubricant, thus Milling tool revolving speed, machining accuracy and service life are improved, is important new technique product, market demand is increasing. A kind of hard alloy bar with hole cold in spiral of the prior art, as disclosed by Chinese patent CN205745999U, in stick It is equipped with cooling hole in spiral shape inside material, is covered with the external screw thread of close arrangement in bar outer surface, the cross section of bar is band tooth Textured, the wide helicla flute that a thread tooth runs through both ends at one is arbitrarily removed in outer surface, in the band spiral of this structure The hard alloy bar in cold hole is not easy to form in batch production process, can generate compacting defect, when compacting can because by Power unevenness causes to suppress deformation.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, provide a kind of hard alloy with hole cold in spiral Bar is improved by structure, on the one hand, can be improved mouldability, be provided enough compacting driving forces, improve worm drive effect Rate；On the other hand, compacting uniform force can be improved, improve compacting deformation.

The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of hard alloy with hole cold in spiral Bar, including round barred body；The cold hole in the spiral shape at the both ends of round barred body is equipped in the axis direction of round barred body；? On the circumferential surface of round barred body, equipped with a plurality of parallel spiral groove, and the cross sectional shape of spiral groove be it is trapezoidal, each spiral is recessed The groove width of slot is identical, and constitutes trapezoidal helical tooth, and the tooth of each helical tooth between two adjacent trapezoid spiral grooves It is wide also identical；The groove width of the spiral groove is 1~4 times of the facewidth of helical tooth；In the circumferential direction of round barred body, it is additionally provided with one Section is the trapezoidal narrow tooth of spiral, and the facewidth of the narrow tooth of spiral is the 1/4~3/4 of the facewidth of helical tooth.

Cold hole is two or two or more in the spiral shape.

The cross sectional shape of the spiral groove be isosceles trapezoid, and between two adjacent trapezoid spiral grooves constitute etc. The trapezoidal helical tooth of waist.

The cross sectional shape of the spiral groove is not isosceles trapezoid, and is constituted between two adjacent trapezoid spiral grooves The not helical tooth of isosceles trapezoid.

The angle of the v-groove of the spiral groove is 10~170 °.

The helix angle of the spiral groove is 10~60 °.

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

The utility model is due to using on the circumferential surface of round barred body, equipped with a plurality of parallel spiral groove, and spiral The cross sectional shape of groove be it is trapezoidal, the groove width of each spiral groove is identical, and the structure between two adjacent trapezoid spiral grooves At trapezoidal helical tooth, and the facewidth of each helical tooth is also identical；The groove width of the spiral groove be helical tooth the facewidth 1~ 4 times；In the circumferential direction of round barred body, being additionally provided with a section is the trapezoidal narrow tooth of spiral, and the facewidth of the narrow tooth of spiral is helical tooth The 1/4~3/4 of the facewidth.This structure of the utility model, on the one hand, mouldability can be improved, enough compacting drivings are provided Power improves screw drive efficiency；On the other hand, compacting uniform force can be improved, improve compacting deformation.

The utility model is described in further detail with reference to the accompanying drawings and embodiments；But a kind of band of the utility model The hard alloy bar in cold hole is not limited to the embodiment in spiral.

Detailed description of the invention

Fig. 1 is the schematic diagram of the part construction (for one section of length) of the utility model；

Fig. 2 is the schematic cross-section of the utility model；

Fig. 3 is the portion the A enlarged diagram in Fig. 2；

Fig. 4 is the portion the B enlarged diagram in Fig. 2；

Fig. 5 is the schematic diagram that the angle of the v-groove of the spiral groove of the utility model is 10 °；

Fig. 6 is the schematic diagram that the angle of the v-groove of the spiral groove of the utility model is 90 °；

Fig. 7 is the schematic diagram that the angle of the v-groove of the spiral groove of the utility model is 170 °.

Specific embodiment

Embodiment

Referring to FIG. 1 to FIG. 4, a kind of hard alloy bar with hole cold in spiral of the utility model, including circle Barred body 1；The cold hole 2 in the spiral shape at the both ends of round barred body is equipped in the axis direction of round barred body 1；In round barred body On circumferential surface, equipped with a plurality of parallel spiral groove 31, and the cross sectional shape of spiral groove 31 be it is trapezoidal, each spiral groove 31 Groove width is identical, and trapezoidal helical tooth 32, and the tooth of each helical tooth 32 are constituted between two adjacent trapezoid spiral grooves It is wide also identical；The groove width of the spiral groove 31 is 1~4 times of the facewidth of helical tooth 32；In the circumferential direction of round barred body 1, also set Having a section is the trapezoidal narrow tooth 33 of spiral, and the facewidth of the narrow tooth 33 of spiral is the 1/4~3/4 of the facewidth of helical tooth 32.

In the present embodiment, cold hole 2 is two in the spiral shape.Certainly, two or more also can be set into as needed, Such as three or four etc..

In the present embodiment, the cross sectional shape of the spiral groove 31 is isosceles trapezoid, and in two adjacent trapezoid spirals The helical tooth 32 of isosceles trapezoid is constituted between groove.

Certainly, according to actual needs, the cross sectional shape of spiral groove may be not isosceles trapezoid, due to spiral groove Cross sectional shape is that in this case isosceles trapezoid does not just constitute not isosceles trapezoid between two adjacent trapezoid spiral grooves yet Helical tooth.

The helix angle of spiral groove is 10~60 °.

The angle of the v-groove of spiral groove is 10~170 °.

In the present embodiment, the angle of the v-groove of spiral groove 31 is 98 °.It is of course also possible to as needed, by spiral groove 31 The angle of the v-groove is set as 10 ° (as shown in Figure 5), and spiral groove 31 at this time is approximately rectangular shape；Either by spiral groove 31 The angle of the v-groove is set as 90 ° (as shown in Figure 6)；The angle of the v-groove of spiral groove 31 is either set as 170 ° (as shown in Figure 7).

It is on squeezing outer mold inner wall, around mold axial direction with spiral motion rail when making the utility model Mark opens a plurality of parallel spiral groove (i.e. thread groove), and every thread groove width is identical, and the helix angle of thread groove is 10-60 °, spiral shell The section of groove slot is ladder type, and ladder type can be isosceles trapezoid, and either isosceles trapezoid, the ladder-type trough angle of the v-groove are not 10-170 °； The trapezoid spiral groove 31 and trapezoid spiral tooth 32 of the utility model can be made using the extruding outer mold, i.e. extruding outer mold The corresponding helical tooth 32 that the utility model is made of thread groove.And the narrow tooth 33 of trapezoidal spiral is made, it is not reduce thread groove Extruding outer mold on arbitrarily open a narrow slot, narrow slot groove width is the 1/4~3/4 of normal groove groove width, by extruding outer mold The narrow tooth 33 of spiral of utility model is made in narrow slot.

A kind of hard alloy bar with hole cold in spiral of the utility model, is used by spiral groove 31 and helical tooth 32 Trapezium structure can make to be distributed spiral slot number as much as possible on existing extruding outer mold, provide bigger extruding driving force, improve Pressure check.The chamfered shape of screw thread is known as form of thread in machinery, there is the shapes such as triangular form, T-type, circular arc type, square, spiral The presence of hole bar product surface form of thread, can provide worm drive power for compression moulding, so that the molding of threaded hole stick (if It is driven without this screw, zigzag shape can not be presented in interior cold hole after extrusion forming).When by ladder-type trough design, due to ladder-type trough Three side sizes are adjustable and variation, i.e. tooth form angle of the v-groove scope of design value is larger, when bar circumference C is fixed, bar table Face can the theoretical formula of quantity of arrangement of grooves be N=C/ (A+B), wherein space-threaded tooth width B between slot and slot is to fix Value, ladder-type trough tooth form groove width A can reduce A value according to force design, thus increase slot number N value, it can be as much as possible in circumference Upper arrangement slot number.Rifle bar suppresses driving force F=P*S, and P is the pressure of pressing material, is constant for the inherent characteristic of material；S is spiral shell The surface area for revolving rod product, since ladder type slot number increases, stick body surface area S increases, and increases rifle bar driving force F, driving force Increase the cementation power enhancing that can make between material, reduces compacting defect.

It in the prior art, is arbitrarily to remove a thread tooth into a wide spiral through both ends in bar outer surface Slot is then to reduce by a helicla flute corresponding to outer mold, causes slot teeth size to be relatively larger than other slot teeth, easily lead to pressed surface shape Become；What the utility model corresponded to outer mold is 1/4~3/4 that narrow slot slot Design of Tooth Width of Right Shaft is normal slot, is equal in original spiral shell It is on spin slot to increase a thread groove more, unbalance stress is avoided, compacting S type bending is improved；When compacting, driving that threaded hole stick is subject to Power is F, if the uniform equal part bar circumference of slot, it is F1=F/N that driving force suffered by every single slot is consistent.The sipes of the prior art Design is removed one of thread groove divided by as measuring flume (reference line when measurement screw pitch), and design value is 2 times of threads Width, the driving force being subject to i.e. frictional force are also 2 times of other slots, when compacting, easily generate stress in this slot and concentrate, with spiral Easily the bending of helical form S type is presented on this slot stick body surface in transmission, the uneven of stress.The utility model is designed using narrow slot slot tooth, It is to be further added by one narrower slot of design on equally distributed helicla flute, is used as measuring flume, the slot facewidth is designed with respect to other slots It is worth small by 1/4~3/4, influences smaller on being uniformly distributed for driving force, opposite sipes measuring flume tooth, stress is more uniform, can change The kind curved looks of pressing S bend.

A kind of hard alloy bar with hole cold in spiral of the utility model, using on the circumferential surface of round barred body 1, Equipped with a plurality of parallel spiral groove 31, and the cross sectional shape of spiral groove 31 is trapezoidal, the groove width phase of each spiral groove 31 Together, and between two adjacent trapezoid spiral grooves trapezoidal helical tooth 32 is constituted, and the facewidth of each helical tooth 32 also phase Together；The groove width of the spiral groove 31 is 1~4 times of the facewidth of helical tooth 32；In the circumferential direction of round barred body 1, it is additionally provided with one Section is the trapezoidal narrow tooth 33 of spiral, and the facewidth of the narrow tooth 33 of spiral is the 1/4~3/4 of the facewidth of helical tooth 32.The utility model This structure, on the one hand, mouldability can be improved, enough compacting driving forces are provided, improve screw drive efficiency；Another party Face can improve compacting uniform force, improve compacting deformation.

The preferred embodiment of above-mentioned only the utility model, does not impose any limitation on the present invention.Though So the utility model has been disclosed with preferred embodiment as above, however is not intended to limit the utility model.It is any to be familiar with this field Technical staff, in the case where not departing from technical solutions of the utility model range, all using the technology contents of the disclosure above Many possible changes and modifications are made to technical solutions of the utility model, or are revised as equivalents equivalent embodiment.Therefore, All contents without departing from technical solutions of the utility model, according to the utility model technical spirit made to the above embodiment What simple modification, equivalent variation and modification should all be fallen in the range of technical solutions of the utility model protection.

Claims (6)

1. a kind of hard alloy bar with hole cold in spiral, including round barred body；It is equipped with and passes through in the axis direction of round barred body Wear cold hole in the spiral shape at the both ends of round barred body；It is characterized by: on the circumferential surface of round barred body, equipped with a plurality of parallel spiral shell Revolve groove, and the cross sectional shape of spiral groove be it is trapezoidal, the groove width of each spiral groove is identical, and in two adjacent trapezoidal spiral shells Trapezoidal helical tooth is constituted between rotation groove, and the facewidth of each helical tooth is also identical；The groove width of the spiral groove is spiral 1~4 times of the facewidth of tooth；In the circumferential direction of round barred body, being additionally provided with a section is the trapezoidal narrow tooth of spiral, the tooth of the narrow tooth of spiral Width is the 1/4~3/4 of the facewidth of helical tooth.

2. the hard alloy bar according to claim 1 with hole cold in spiral, it is characterised in that: cold in the spiral shape Hole is two or two or more.

3. the hard alloy bar according to claim 1 or 2 with hole cold in spiral, it is characterised in that: the spiral is recessed The cross sectional shape of slot is isosceles trapezoid, and the helical tooth of isosceles trapezoid is constituted between two adjacent trapezoid spiral grooves.

4. the hard alloy bar according to claim 1 or 2 with hole cold in spiral, it is characterised in that: the spiral is recessed The cross sectional shape of slot is not isosceles trapezoid, and the spiral of not isosceles trapezoid is constituted between two adjacent trapezoid spiral grooves Tooth.

5. the hard alloy bar according to claim 1 with hole cold in spiral, it is characterised in that: the spiral groove The angle of the v-groove is 10~170 °.

6. the hard alloy bar according to claim 1 with hole cold in spiral, it is characterised in that: the spiral groove Helix angle is 10~60 °.