CN207534018U - A kind of high-precision modeling outside chip removal deep hole drill cutter - Google Patents

Abstract

The utility model provides a kind of high-precision modeling outside chip removal deep hole drill cutter, including handle of a knife, knife bar and cutter head, one end of knife bar is installed in handle of a knife, the other end connection cutter head of knife bar, knife bar upper edge are axially arranged with chip space, and chip space extends to cutter head end, cutter head end is equipped with apex point, apex point includes surface in the second blade that the first blade and vertical section of plane are arc, and the second blade is the half cone shape for cutting a part, and the first blade connect to form apex point with the second blade.Die injection moulding is processed using the utility model, and the bottom of die hole has a round and smooth transition face, and plastic liquid flows into unobstructed, is not in rebound phenomena, moulding surfacing, finished product improves product quality and processing efficiency without handle by hand.

Description

A kind of high-precision modeling outside chip removal deep hole drill cutter

Technical field

The utility model belongs to depth drill cutter manufacture technical field, and in particular to a kind of high-precision modeling external chip discharging depth Hole drill cutter.

Background technology

Deep hole machining refers to the hole machined of draw ratio (i.e. the ratio between hole depth L and aperture d) more than 5.Common deep hole (L/d<5 ~20) lengthening can be used or spreading fluted drill is processed, for special deep hole (L/d>20~100) then must special equipment, It is processed on special deep hole working machine with depth drill cutter.In the deep hole machining for being molded class die steel manufacture field, Hole is mostly bored, in the prior art traditional drill gun using external chip discharging list double-edged deep-hole to be semiclosed, due to its drill bit had pasta, The face at multiple and different inclination angles such as inner edge rear corner surface, point of a knife rear corner surface, interior cutting edge, outer cutting edge and sword, and each face and sword Be plane or straight line, it is " W " type to lead to the bottom shape of workpiece hole that rotary drilling-head processes, as shown in Figure 1, when with When family uses mold injection, plastic liquid flows obstructed when reaching bottom hole, it may appear that the rebound phenomena of liquid, plastic optical fibre It may be stuck in above " W " type dog-ear, lead to moulding surface irregularity, poor sealing performance, for the high product of precision prescribed, Necessary manual handle moulding, it is time-consuming and laborious.

Utility model content

The purpose of this utility model is to provide a kind of high-precision modeling outside chip removal deep hole drill cutter, uses its drilling hole bottom Round and smooth, flatness is high, high precision machining, suitable for the drilling of injection molding class die steel.

The utility model provides following technical solution：

A kind of high-precision modeling outside chip removal deep hole drill cutter, including handle of a knife, knife bar and cutter head, one end peace of the knife bar Loaded in the handle of a knife, the other end of the knife bar connects the cutter head, and the knife bar upper edge is axially arranged with chip space, the row Bits slot extends to the cutter head end, and the cutter head end is equipped with apex point, and the apex point includes the first knife that surface is in plane Sword and the second blade that vertical section is arc, second blade are to cut a part of half cone shape, first blade It connect to form the apex point with second blade.

Preferably, the tool bit diameter is more than the knife bar diameter.

Preferably, the apex point deviates the axle center of the cutter head to the side of first blade.

Preferably, the axle center distance of the central point of the apex point and the cutter head be less than the tool bit diameter ten/ One.

Preferably, the apex point outermost end is radially equipped with a tack rake face.

Preferably, the material of first blade and second blade is YT798 hard alloy.

The beneficial effects of the utility model are：

1st, using the depth drill tool sharpening injection mold of this apex point structure, the bottom in hole is dome-type, is had more Round and smooth transition face, plastic liquid inflow is unobstructed, is not in rebound phenomena, moulding surfacing, finished product without locate by hand Reason, improves product quality and processing efficiency.

2nd, tool bit diameter is bigger compared with knife bar, ensures that knife bar can be rotated freely in cutting hole without the hole inner wall that rubs Cutting surface；Meanwhile tool bit diameter expand, can to the hole wall of cutting hole generate rolling effect, improve cutting hole circularity and Overall processing quality.

3rd, apex point deviates the axle center of cutter head to the first blade side, and stress suffered by the first blade is made mainly to play guide-localization work With, and stress suffered by the second blade mainly plays shear action, further improves cutting quality and efficiency.

4th, the axle center of the central point of apex point and cutter head distance is less than 1/10th of tool bit diameter；Apex point outermost end is radially Equipped with a tack rake face, the flatness of processing metapore baseplane is further improved.

Description of the drawings

Attached drawing is used to provide a further understanding of the present invention, and a part for constitution instruction, with this practicality Novel embodiment for explaining the utility model, does not form the limitation to the utility model together.In the accompanying drawings：

Fig. 1 is the outside chip removal deep hole drill tool sharpening structure diagram of the prior art；

Fig. 2 is the utility model structure diagram；

Fig. 3 is the bottom view of Fig. 2；

Fig. 4 is cutter rotation schematic diagram when apex point deviates the axle center distance of cutter head more than tool bit diameter 1/10；

Fig. 5 is cutter rotation schematic diagram when apex point deviates the axle center distance of cutter head less than tool bit diameter 1/10；

Fig. 6 is the cutter rotation schematic diagram that Fig. 5 increases tack rake face.

In figure label for：1. handle of a knife；2. knife bar；21. chip space；3. cutter head；4. apex point；41. the first blade；42. second Blade；43. tack rake face.

Specific embodiment

As shown in Figures 2 and 3, a kind of high-precision modeling outside chip removal deep hole drill cutter, including handle of a knife 1, knife bar 2 and cutter head 3, one end of knife bar 2 is installed in handle of a knife 1, and the other end installation cutter head 3 of knife bar 2,2 upper edge of knife bar is axially arranged with chip space 21, Chip space 21 extends to the end of cutter head 3, and 3 end of cutter head is equipped with apex point 4, and apex point 4 includes first that surface is in plane Blade 41 and the second blade 42 that vertical section is arc, the second blade 42 are to cut a part of half cone shape, the first blade 41 connect to form apex point 4 with the second blade 42.Use the depth drill tool sharpening injection mold of this apex point structure, the bottom in hole For dome-type, there is rounder and more smooth transition face, plastic liquid inflow is unobstructed, is not in rebound phenomena, moulding surface is put down Whole, finished product without handling by hand.

Preferably, as shown in Fig. 2, 3 diameter A of cutter head is more than 2 diameter B of knife bar.3 diameter of cutter head is bigger compared with knife bar 2, ensures Knife bar 2 can rotate freely the cutting surface without the hole inner wall that rubs in cutting hole；Meanwhile 3 enlarged-diameter of cutter head, it can be right The hole wall of cutting hole generates rolling effect, improves the circularity of cutting hole and overall processing quality.

Preferably, as shown in Figures 3 to 6, the apex point 4 deviates the axle center of cutter head 3 to 41 side of the first blade.First, Apex point 4 deviates the axle center of cutter head 3 to 41 side of the first blade, and the drift angle between the first blade 41 and radial direction is made to be more than and the second knife Drift angle between sword 42 and radial direction, the radial load acted on the first blade 41 are more than the radial direction acted on the second blade 42 Power has a power to act on the lathe conducting bar of cutter always, and lathe conducting bar is made to play the effect of its support guide, prevents drill bit from boring Partially；Secondly, stress suffered by the first blade 41 is made mainly to play guide-localization, and stress suffered by the second blade 42 mainly plays cutting Effect, it is convenient to process smooth round and smooth bottom hole face, further improve cutting quality and efficiency.

Preferably, as shown in Figure 3, Figure 5 and Figure 6, it is straight to be less than cutter head 3 by the axle center distance C of the central point of apex point 4 and cutter head 3 / 10th of diameter.If the central point of apex point 4 and the axle center distance C of cutter head 3 are larger, as shown in figure 4, drilling hole bottom may still go out Existing W type reliefs.The central point of apex point 4 and the axle center distance C of cutter head 3 are controlled, is equivalent to the first blade 41 of control and the second knife The difference of the radial direction drift angle of sword 42, so as to can reduce in deep hole operation of the drill bit 3 axle center of cutter head respectively with the first blade 41 and Gap between second blade 42 cuts down the W type waves of bottom hole plane, can further improve the flatness of the bottom hole plane of drilling.

Preferably, as shown in Figure 3 and Figure 6,4 outermost end of apex point is radially equipped with a tack rake face 43, tack rake face 43, which are equivalent to apex point 4, has cut off pointed portion, makes the die hole bottom planarization after processing good, so as to which moulding is more beautiful；Tool Have tack rake face 43 apex point 4 it is more resistant through with, it is and simple in structure, convenient for manufacture.

Preferably, the material of the first blade 41 and the second blade 42 is YT798 hard alloy.

The depth drill cutter of the present embodiment utilizes numerical control five-shaft linkage grinding machine, writes program and is process, using it to note The drilling of class die steel is moulded, bottom hole smooth surface, no transition face, injection rod piece surface is without secondary operation.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, although ginseng The utility model is described in detail according to previous embodiment, it for those skilled in the art, still can be with It modifies to the technical solution recorded in foregoing embodiments or equivalent replacement is carried out to which part technical characteristic.It is all Within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this practicality Within novel protection domain.

Claims (6)

1. a kind of high-precision modeling outside chip removal deep hole drill cutter, including handle of a knife, knife bar and cutter head, one end installation of the knife bar In in the handle of a knife, the other end of the knife bar connects the cutter head, and the knife bar upper edge is axially arranged with chip space, the chip removal Slot extends to the cutter head end, which is characterized in that the cutter head end is equipped with apex point, and it is in plane that the apex point, which includes surface, The first blade and vertical section be arc the second blade, second blade be cut a part half cone shape, it is described First blade connect to form the apex point with second blade.

2. high-precision modeling according to claim 1 outside chip removal deep hole drill cutter, which is characterized in that the tool bit diameter More than the knife bar diameter.

3. high-precision modeling according to claim 1 outside chip removal deep hole drill cutter, which is characterized in that the apex point is to institute Deviate the axle center of the cutter head in the side for stating the first blade.

4. high-precision modeling according to claim 3 outside chip removal deep hole drill cutter, which is characterized in that in the apex point Heart point and the axle center distance of the cutter head are less than 1/10th of the tool bit diameter.

5. high-precision modeling according to claim 4 outside chip removal deep hole drill cutter, which is characterized in that the apex point is outermost End is radially equipped with a tack rake face.

6. high-precision modeling according to claim 1 outside chip removal deep hole drill cutter, which is characterized in that first blade Material with second blade is YT798 hard alloy.