CN207930031U

CN207930031U - A kind of hard alloy twist drill with four plane F types

Info

Publication number: CN207930031U
Application number: CN201820178247.6U
Authority: CN
Inventors: 单延松
Original assignee: Suzhou Heng Bit Precision Tool Co Ltd
Current assignee: Suzhou Heng Bit Precision Tool Co Ltd
Priority date: 2018-02-01
Filing date: 2018-02-01
Publication date: 2018-10-02
Anticipated expiration: 2028-02-01

Abstract

Longer, wider chip breaking is generated during cutting in order to solve standard fluted drill, it is unfavorable for a point situation for bits and chip breaking, the utility model proposes a kind of hard alloy twist drills with four plane F types, it mainly increases by four plane F type chain-wales by the outer blade portion of the bit part in standard fluted drill, due to increasing this four plane F type chain-wales, chip breaking is just interrupted in bit part, so that cutting shortens, so that cutting can more move smoothly through chip space discharge drilling, to extend the service life of hard alloy twist drill.

Description

A kind of hard alloy twist drill with four plane F types

Technical field

The utility model belongs to cutting tool field, is specifically related to a kind of hard alloy fiber crops with four plane F types Flower bores.

Background technology

Hard alloy twist drill is to be relatively fixed the rotary cutting of axis by it with the tool of the circular hole of drilling workpiece, because The spiral likeness in form fried dough twist of its chip pocket and gain the name.Fluted drill is most widely used a kind of cutter in process tool, processing It is efficient, processing quality is good.Fluted drill structure in the prior art is similar, has a single function, and there are many shortcoming and defect.Standard Fluted drill is made of shank, neck and working portion, and working portion refers mainly to main cutting edge, with other kinds of cutting tool It compares, the main cutting edge length of standard fluted drill is longer, the case where being susceptible to fracture when shaking excessive in its cutting process, And longer, the wider chip breaking generated, it is unfavorable for point bits and a chip breaking.

In order to solve the case where above hard alloy twist drill divides bits to be difficult to be discharged with chip breaking during drilling, have specially Application No. is the utility model patents of CN201720244104 to propose a kind of thin core thickness rolled spiral drill of apex point for profit, mainly passes through Blade is increased in chip space to promote point bits and a chip breaking ability, but is adopted the structure so that the preparation work of fluted drill Skill is complex, and the cost of the polishing maintenance during use also accordingly increases.

Utility model content

In view of this, generate longer, wider chip breaking during cutting to solve standard fluted drill, it is unfavorable for point The situation of bits and chip breaking, the utility model proposes a kind of hard alloy twist drills with four plane F types, mainly by marking The outer blade portion of the bit part of quasi- fluted drill increases by four plane F type chain-wales, due to increasing this four plane F type chain-wales, Chip breaking is just interrupted in bit part so that cutting shortens, so that cutting being capable of the more row of moving smoothly through Slot discharge drilling is considered to be worth doing, to extend the service life of hard alloy twist drill.

A kind of hard alloy twist drill with four plane F types comprising：Shank 1, drill core part 2, wherein drill core part Including chip space 21, side edge 22 and apex point 23, shank 1 is connected with one end of the chip space 21 of drill core part 2 and side edge 22, chip removal Slot 21 fills interconnection with 22 main body of side edge in screw thread, and chip space 21 is connected with the other end of side edge 22 with apex point 23, wherein Apex point 23 includes point of a knife 231, outside 233, inner edge 234, each group of outside 233 and inner edge 234 respectively with corresponding side edge 22 It is connected, and each group of outside 233 and inner edge 234 cross at bit central axis, wherein the blade positioned at higher position is outside 233, the blade for being located at lower position is inner edge 234, it is characterised in that：It is arranged close to the position of central shaft at 233 top of outside Four plane F types chain-wales 232.

Further, the width H=diameter at edge part D x 5% of the four plane F types chain-wales 232.

Further, the quantity of the four plane F types chain-wales 232 is 1~6；Further, described Siping City The quantity of face F types chain-wales 232 is less than or equal to the total quantity of outside；Further, the four plane F types chain-wales 232 Quantity be equal to outside quantity.

Further, the quantity of the blade of the hard alloy twist drill with four plane F types is 1~6.

The utility model has the beneficial effects that：By the position close to central shaft on 23 outside 233 of apex point, Siping City is set Face F types chain-wales 232 so that at work, the chip of generation pushes away hard alloy twist drill along the axial direction spiral of drill bit During going out, cut off by four plane F types chain-wales 232, so that chip can shorten when passing through apex point 23, to Chip is enable more to smoothly pass over the discharge of chip space 21, to extend the service life of hard alloy twist drill.

Description of the drawings：

Specific implementation mode is further described below in conjunction with the accompanying drawings, wherein：

Fig. 1 is the overall structure figure of hard alloy twist drill.

Fig. 2 is the structural schematic diagram of the part drill core of common hard alloy twist drill.

Fig. 3 is the structure of the part drill core of the hard alloy twist drill with four plane F type chain-wales of the utility model Schematic diagram.

Fig. 4 is the schematic enlarged-scale view of four plane F type chain-wales.

Fig. 5 is the left view of the hard alloy twist drill with four plane F type chain-wales of the utility model.

Primary structure number explanation：

Following specific implementation mode will further illustrate the utility model in conjunction with above-mentioned attached drawing.

Specific implementation mode

Case 1 is embodied：

As shown in figure 3, showing for a kind of structure of the part drill core for the hard alloy twist drill carrying four plane F type chain-wales It is intended to；As shown in figure 4, for the schematic enlarged-scale view of four plane F type chain-wales；As shown in Fig. 5, to carry four plane F type chain-wales Hard alloy twist drill left view.In conjunction with this three structural schematic diagrams, propose that one kind of the implementation case 1 carries four planes The hard alloy twist drill of F type chain-wales comprising：Shank 1, drill core part 2, wherein drill core part include chip space 21, side Sword 22 and apex point 23, shank 1 are connected with one end of the chip space 21 of drill core part 2 and side edge 22, and chip space 21 is led with side edge 22 Body fills interconnection in screw thread, and chip space 21 is connected with the other end of side edge 22 with apex point 23, wherein apex point 23 includes knife Point 231, outside 233, inner edge 234, each group of outside 233 and inner edge 234 are connected with corresponding side edge 22 respectively, and each Group outside 233 and inner edge 234 cross at bit central axis, wherein the blade positioned at higher position is outside 233, are located at relatively low The blade of position is inner edge 234, it is characterised in that：It is small close to the position of central shaft four plane F types of setting at 233 top of outside Platform 232.

The width H=diameter at edge part D x 5% of the four plane F types chain-wales 232, the four plane F types are small flat The quantity of platform 232 is 2.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.

Claims

1. a kind of hard alloy twist drill with four plane F types comprising：Shank (1), drill core part (2), wherein drill core portion It includes chip space (21), side edge (22) and apex point (23), the chip space (21) and side edge of shank (1) and drill core part (2) to divide (22) one end is connected, and chip space (21) fills interconnection, chip space (21) and side edge (22) with side edge (22) main body in screw thread Other end be connected with apex point (23), wherein apex point (23) includes point of a knife (231), outside (233), inner edge (234), each Group outside (233) and inner edge (234) are connected with corresponding side edge (22) respectively, and each group of outside (233) and inner edge (234) It crosses at bit central axis, wherein the blade positioned at higher position is outside (233), the blade for being located at lower position is inner edge (234), it is characterised in that：Four plane F types chain-wales (232) are set close to the position of central shaft at the top of outside (233).

2. the hard alloy twist drill with four plane F types as described in claim 1, it is characterised in that：The four plane F The width H=diameter at edge part Dx5% of type chain-wales (232).

3. the hard alloy twist drill with four plane F types as described in claim 1, it is characterised in that：The four plane F The quantity of type chain-wales (232) is 1~6.

4. the hard alloy twist drill with four plane F types as described in claim 1, it is characterised in that：The four plane F The total quantity of quantity≤outside of type chain-wales (232).

5. the hard alloy twist drill with four plane F types as described in claim 1, it is characterised in that：Described has four The quantity of the blade of the hard alloy twist drill of plane F types is 1~6.