CN206028823U - Fluted drill of high pressure heater worker precision - Google Patents

Abstract

The utility model provides a fluted drill of high pressure heater worker precision, belongs to machine tooling equipment technical field, comprises drill tip, brill body and drillstock, bores the body and comprises jointly cutting edge and the chip groove that the strip specification is the same, the drillstock is honest six prismatic forms, and the prismatic side of drillstock goes up to open has three locating hole, and the locating hole each other becomes 120 and distributes on six positive prismatic surfaces, and the locating hole has the flat blind hole of chamfer for the drill way. Utilize in the use among the clamping device during steel ball positioning acts on the locating hole, the clamping -force of increase substantially drill bit in anchor clamps, the state of drill bit centre gripping is more stable, has reduced rocking of drill bit work in -process, and the positioning accuracy and the machining precision in hole have obtained the improvement that is showing, have improved drilling production efficiency, have reduced the processing cost.

Description

A kind of fluted drill of high manufacturing accuracy

Technical field

This utility model belongs to machining apparatus technical field, is related to a kind of drill bit, more particularly to a kind of high processing essence The fluted drill of degree.

Background technology

Drilling is relatively conventional a kind of processing mode in machining, and common drill bit is to carry out drilling, reaming or spot-facing Machining.Drilling be with fluted drill, chit drill or centre drill etc. on solid material drilling through hole or blind hole；Reaming is with expansion Hole drill expands the aperture of pre-manufactured hole on workpiece；Spot-facing is to process counterbore, taper hole, part plan with spot-facer in one end of pre-manufactured hole Or sphere etc., to install securing member.Drilling mode mainly has two kinds：(1) workpiece is motionless, and drill bit rotates and axially enters Give, this mode is typically applied on drilling machine, boring machine, machining center or building-block machine；(2) axial direction is only made in workpiece rotation, drill bit Feeding, this mode are typically applied on lathe or deep hole drilling machine.The boring aperture scope of fluted drill is 0.05～100mm.

Wherein most widely used with fluted drill, general aperture adopts straight shank twist drill in below 13mm, mainly considers Drill bit convenient mounting and clamping and enough clamping forces；In more than 13mm frequently with taper drill, this is due to taper very little, profit in aperture With the principle of frictional force, certain moment of torsion can be transmitted, but because being taper fit, it is possible to it is convenient to dismantle, same In the certain limit of taper, workpiece be free to dismounting, while operationally affecting less to the technique effect processed.

However, traditional fluted drill has the following disadvantages：(1) diameter of fluted drill is limited by aperture, and helicla flute makes brill Core is thinner, and stiffness of twist drill is low；Only two rib bands are oriented to, the easy deflection of axis in hole；Chisel edge makes centering difficult, and axial drag increases Greatly, not enough, drill bit easily swings clamping stability.Therefore, the Form and position error of drilling bore hole is larger；(2) rake face of fluted drill and Knife face is all curved surface afterwards, and the anterior angle, relief angle along main cutting edge each point is different, and the anterior angle of chisel edge reaches -55 °.Machining condition is very Difference；Unreasonable distribution of the cutting speed along cutting edge, the minimum point of a knife cutting speed of intensity are maximum, so serious wear.Therefore, The hole precision of processing is low；(3) the full sword of drill bit main cutting edge participates in cutting, the cutting speed and unequal, easy shape of each point on sword Spirality chip, chip removal are difficult.Therefore chip and hole wall extrusion friction, usually scratch hole wall, the surface roughness after processing It is very low.In addition, relatively low cutting speed and the less amount of feeding all govern the production efficiency of drilling, every hole is virtually increased Processing cost.

Utility model content

This utility model for conventional drill clamp in fixture it is unstable, in drilling process stability not enough so as to shadow The positioning precision and a variety of deficiencies such as machining accuracy and drilling low production efficiency, processing cost height in hole is rung, proposes that a kind of height adds The fluted drill of work precision, can increase considerably chucking power of the drill bit in fixture, can improve the machining accuracy of drilling, drilling Working (machining) efficiency is also obtained effectively raising.

The technical solution of the utility model：A kind of fluted drill of high manufacturing accuracy, is made up of apex point, brill body and drillstock, institute State brill body to be collectively formed by bar specification identical cutting edge and chip area；It is characterized in that：The drillstock is in honest hexa-prism, Three location holes are provided with the prism side of the drillstock, and the location hole is mutually 120 ° of distributions on positive six prismsby face, described Location hole is flat blind hole of the aperture with chamfering.

The chip area is helicla flute, and the lead angle of chip area is 30 °.

The aperture of the location hole is 3～6mm, and hole depth is 1.5～3.5mm, and orifice chamfer is 0.4 × 45 °.

The distance of the Kong Xinzhi drillstock end faces of the location hole is 12～15mm.

The beneficial effects of the utility model are：The utility model proposes a kind of high manufacturing accuracy fluted drill, drillstock is Positive six prismsby, is provided with three flat blind holes for being mutually 120 ° on positive six prismsby surface, using steel in clamping device during use Pearl positioning action increases considerably chucking power of the drill bit in fixture in location hole, and the state of drill bit clamping is more stable, subtracts Lack rocking for drill bit work in-process, the positioning precision and machining accuracy in hole have obtained significant raising, improve drilling production Efficiency, reduces processing cost.

Description of the drawings

Fig. 1 is this utility model overall structure diagram.

Fig. 2 is this utility model main structure diagram.

Fig. 3 is right side structural representation in Fig. 2.

Fig. 4 is left view structural representation in Fig. 2.

Fig. 5 is the removal end view drawing in A-A directions in Fig. 2.

In figure：Apex point 1, cutting edge 2, chip area 3, drillstock 4, location hole 5.

Specific embodiment

The utility model is described in further detail below in conjunction with the accompanying drawings：

As Figure 1-5, a kind of fluted drill of high manufacturing accuracy, is made up of apex point 1, brill body and drillstock 4, bores body by two Specification identical cutting edge 2 and chip area 3 are collectively formed；Drillstock 4 is in honest hexa-prism, is provided with the prism side of drillstock 4 Three location holes 5, location hole 5 are mutually 120 ° of distributions on positive six prismsby face, and location hole 5 is that aperture is flat blind with chamfering Hole.

As Figure 1-5, a kind of fluted drill of high manufacturing accuracy, chip area 3 are helicla flute, and the lead angle of chip area is 30°；The aperture of location hole 5 is 3～6mm, preferentially selects 5mm in the present embodiment, and hole depth is 1.5～3.5mm, excellent in the present embodiment 2.5mm is selected first, orifice chamfer is 0.4 × 45 °；The distance of 4 end face of Kong Xinzhi drillstocks of location hole 5 be 12～15mm, this reality 14mm is selected preferentially in applying example.

This utility model drillstock is positive six prismsby, is provided with three flat blind holes for being mutually 120 ° on positive six prismsby surface, makes Chucking power of the drill bit in fixture is increased considerably using steel ball positioning action in clamping device in location hole with during, The state of drill bit clamping is more stable, reduces rocking for drill bit work in-process, and the positioning precision and machining accuracy in hole are obtained It is significant to improve, drilling production efficiency is improve, processing cost is reduced.

Claims (4)

1. a kind of fluted drill of high manufacturing accuracy, is made up of apex point (1), brill body and drillstock (4), and the brill body is by two specification phases Same cutting edge (2) and chip area (3) is collectively formed；It is characterized in that：Described drillstock (4) be in honest hexa-prism, the brill Three location holes (5) are provided with the prism side of handle (4), and location hole (5) are mutually 120 ° of distributions on honest six prismatic surface, Described location hole (5) are flat blind hole of the aperture with chamfering.

2. the fluted drill of a kind of high manufacturing accuracy according to claim 1, it is characterised in that：Described chip area (3) are spiral shell Spin slot, the lead angle of chip area is 30 °.

3. the fluted drill of a kind of high manufacturing accuracy according to claim 1, it is characterised in that：The hole of location hole (5) Footpath is 3～6mm, and hole depth is 1.5～3.5mm, and orifice chamfer is 0.4 × 45 °.

4. the fluted drill of a kind of high manufacturing accuracy according to claim 1, it is characterised in that：The hole of location hole (5) The distance of the heart to drillstock (4) end face is 12～15mm.