CN201098741Y

CN201098741Y - Dimension adjustable floating boring tool

Info

Publication number: CN201098741Y
Application number: CNU2007200277344U
Authority: CN
Inventors: 陈焕春; 陈硕
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-13
Filing date: 2007-09-13
Publication date: 2008-08-13
Anticipated expiration: 2017-09-13

Abstract

A size-adjustable floating boring cutter is characterized in that a boring cutter is arranged in a square hole constituted by an end cover and grooves on a holder in a clearance fit manner; an expansion pin can be arranged in a taper hole with small conical degree at a position on the boring cutter through a hole on the holder perpendicular to the central plane of the square hole and intersecting the central line of the square hole and the axial line of taper handle of the holder; an identical section is respectively removed from both sides of the expansion pin along two side generatrixes of the cone and positioned in the width direction of the boring cutter; and a nut and a gasket are arranged on a stud on the small end of the expansion pin and is pressed on a plane on one side of the holder. A displacement between the expansion pin and the boring cutter can be generated by rotating the nut to enable the length direction of the boring cutter to extend, so that the size of the worn boring cutter can restore to an eligible range while measuring and monitoring the size between two blades of the boring cutter. When in use, the expansion pin, the nut and the gasket are removed from the boring cutter. The size-adjustable floating boring cutter has the advantages of simple structure, convenient manufacture, low cost, and easy size adjustment.

Description

The floating boring tool of dimension adjustable

Affiliated technical field

The utility model relates to metal cutting tool, especially floating boring tool.

Background technology

Floating boring tool is the general utility tool in accurate hole on the processing parts, and it uses on boring machine, lathe or drilling machine, can eliminate the influence of the coaxiality error generation in hole on center cutter and the institute's workpiece, processes high-quality hole.Be widely used.The floating current boring cutter generally has two kinds: 1, blade is arranged in the two ends of rectangle cutter hub, and cutter hub is contained in and is matched in clearance in the square groove on the knife bar.Simple in structure, but blade wearing and tearing boring cutter size can not use again after just little, cause waste.2, the cutter hub of floating boring tool partly is assembled by two, and the size adjustable between two blades is whole.Therefore, after the blade wearing and tearing, the boring cutter size can be transferred to and can process qualified hole.Make complexity, the floating boring tool that processing dimension is little is extremely difficult to be made.Because that will adjust between two blades of blade wearing and tearing back is small-sized, often to adjust the result undesirable and the used thread pitch of guiding mechanism is gone up factor such as will lock after adjusting more greatly.

Summary of the invention

The purpose of this utility model provides a kind of floating boring tool of dimension adjustable, can make the elongated lengthwise of boring cutter easily, thereby the boring cutter size after the wearing and tearing is returned to acceptability limit.

The technical scheme that its technical problem that solves the utility model adopts is: in the design of the center of monoblock type rectangle boring cutter little tapered hole is arranged, utilize the have flat taper pin identical to make the length direction of boring cutter bloated long, solve the problem of boring cutter wearing and tearing back size decreases with its tapering.The boring cutter of dimension adjustable is made up of knife bar, expand pin, end cap, sunk screw and boring cutter, end cap is fixed on the knife bar end face with 4 sunk screws, form square hole with the groove that knife bar should be held, the center line of this square hole is vertical with knife bar taper shank axial line and crossing, knife bar taper shank axial line is on a central plane of square hole, and boring cutter is contained in the square hole that the groove on end cap and the knife bar forms and is matched in clearance; Bloated pin can pass on the knife bar the vertical and hole that intersect with square hole center line, knife bar taper shank axial line of a central plane with square hole, be contained on the boring cutter in the conelet degree taper hole of this position, the cone of bloated pin is identical with the tapering of boring cutter conelet degree taper hole, identical part is removed along two side bus symmetries of cone respectively in the both sides of bloated pin, this part position is at the boring cutter width, and nuts and washers is contained on the double-screw bolt of selling small end that expands and is pressed on the plane of knife bar one side.Rotating nut makes the pin that expands produce displacement with boring cutter, forces the elongated lengthwise of boring cutter, between Centigrade scale is to boring cutter two blades under the measurement of the size supervision, makes boring cutter size restoration after the wearing and tearing to acceptability limit.When boring cutter uses the pin that expands, nuts and washers are laid down.

The advantage of the floating boring tool of this dimension adjustable is: simple in structure, easily manufactured cost is low, and the boring cutter size is adjusted easily.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further described.

Accompanying drawing is the installation diagram of the floating boring tool of dimension adjustable.

Fig. 1 is a front view.

Fig. 2 is the B-B cutaway view of Fig. 1.

Fig. 3 is the A-A cutaway view of Fig. 1.

Fig. 4 is the C-C cutaway view of Fig. 2.

1. knife bars among the figure, pin, 3. end cap, 4. sunk screw, 5. boring cutter 2. expand.

The specific embodiment

Accompanying drawing is that the floating boring tool of dimension adjustable is loaded onto the installation diagram when expanding pin, and the just usefulness when making the elongation of boring cutter 5 sizes of pin 2 that expands will be pulled down the pin 2 that expands when using the floating boring tool bore hole of dimension adjustable.The square boring cutter of general floating boring tool is to be contained in the square groove of knife bar, require boring cutter in the square groove of knife bar, can move flexibly and fit clearance little.As everyone knows, it is very difficult directly processing high-precision square hole on the cylinder of boring cutter bar front end.Therefore the floating boring tool of the dimension adjustable of design adopts following structure: 4 sunk screws 4 of end cap 3 usefulness are fixed on knife bar 1 end face, form square hole with the groove that knife bar 1 should be held.The center line of this square hole is vertical with knife bar 1 taper shank axial line and crossing, knife bar 1 taper shank axial line is on a central plane of square hole, boring cutter 5 is contained in the square hole that end cap 3 and the groove on the knife bar 1 form and is matched in clearance, and boring cutter 5 is H8/f7 with cooperating of square hole both direction.The carbon constructional quality steel manufacturing of boring cutter 5 cutter hubs, the two ends design has the carbide bit of symmetry, so that process the cutting edge of high rigidity.Make boring cutter 5 sizes when elongation: the pin 2 that expands pass on the knife bar 1 a central plane with square hole vertical and with square hole center line, the crossing hole of knife bar 1 taper shank axial line, be contained on the boring cutter 5 in the conelet degree taper hole of this position, the cone of bloated pin 2 is identical with the tapering of the conelet degree taper hole of boring cutter 5, it all is 1: 50, identical part is removed along two side bus symmetries of cone respectively in the both sides of bloated pin 2, in conic section perpendicular to the pin 2 cone axial lines that expand, connects two side bus formation string right central angle be 60 °～80 °.This part position is at boring cutter 5 widths, and nuts and washers is contained on the double-screw bolt of selling 2 small ends that expands and is pressed on the plane of knife bar 1 one sides.The pin 2 big ends that expand are cylinders identical with its cone outside diameter, and the cylinder outer end has to the angle, and the pin 2 that expands is used the carbon constructional quality steel manufacturing, heat treatment 50～55HRC.Rotating nut makes the pin 2 that expands produce displacement with boring cutter 5, the width (referring to accompanying drawing 2, accompanying drawing 4) of part at boring cutter 5 removed on the both sides of pin 2 because expand, boring cutter 5 conelet degree taper holes all have 60 °～80 ° parts not contact (as shown in Figure 4) with pin 2 cones that expand on boring cutter 5 width both sides like this, the cone of pin 2 can only force the length direction anamorphic stretching of boring cutter 5 so expand, the distance of two blades is strengthened, reach the purpose that increases the boring cutter boring size.In making boring cutter 5 anamorphic stretching processes, in time the size between 5 liang of blades of boring cutter is measured supervision, so that make boring cutter 5 size restorations after the wearing and tearing timely and accurately to acceptability limit with Centigrade scale.Generally after the blade reconditioning of the boring cutter 5 after the wearing and tearing, with the pin 2 that expands its boring size is strengthened again, will consider to remove the influence of pin 2 backs of expanding when measuring the size between two blades size.When the size between 5 liang of blades of boring cutter swells when exceeding acceptability limit, the method for available reconditioning blade makes it qualified.To suitably select the size of boring cutter 5 conelet degree taper holes, make the elongation of this hole suitable boring cutter 5 length directions of (cutter hub width) minimum dimension to the outside.The boring cutter 5 less for the boring size is little because of the screw thread of the pin 2 that expands, and rotating nut makes boring cutter 5 distortion at need, can directly knock the pin 2 big ends that expand and make boring cutter 5 distortion.When floating boring tool uses the pin 2 that expands, nuts and washers are laid down.

The floating boring tool of dimension adjustable makes boring cutter 5 elongations increase the boring size through using more than 1 year by the pin 2 that expands, and convenient and reliable, one boring cutter 5 long service life, and respond well application so far.

Claims

1, a kind of floating boring tool of dimension adjustable, it is made up of knife bar, expand pin, end cap, sunk screw and boring cutter, it is characterized in that: end cap is fixed on the knife bar end face with 4 sunk screws, form square hole with the groove that knife bar should be held, the center line of this square hole is vertical with knife bar taper shank axial line and crossing, knife bar taper shank axial line is on a central plane of square hole, and boring cutter is contained in the square hole that the groove on end cap and the knife bar forms and is matched in clearance; Bloated pin can pass on the knife bar the vertical and hole that intersect with square hole center line, knife bar taper shank axial line of a central plane with square hole, be contained on the boring cutter in the conelet degree taper hole of this position, the cone of bloated pin is identical with the tapering of boring cutter conelet degree taper hole, identical part is removed along two side bus symmetries of cone respectively in the both sides of bloated pin, this part position is at the boring cutter width, and nuts and washers is contained on the double-screw bolt of selling small end that expands and is pressed on the plane of knife bar one side.

2, the floating boring tool of dimension adjustable according to claim 1 is characterized in that: boring cutter is contained in end cap and knife bar is formed in the square hole, and boring cutter is H8/f7 with cooperating of square hole both direction.

3, the floating boring tool of dimension adjustable according to claim 1 is characterized in that: the carbon constructional quality steel manufacturing of boring cutter cutter hub, the two ends design has the carbide bit of symmetry, and the cutting edge of high rigidity is arranged on the cutter head.

4, the floating boring tool of dimension adjustable according to claim 1, it is characterized in that: the tapering of the cone of the pin that expands and the conelet degree taper hole of boring cutter all is 1: 50, identical part is removed along two side bus symmetries of cone respectively in the both sides of bloated pin, in conic section perpendicular to the pin cone axial line that expands, connect string that two side bus form right central angle be 60 °～80 °, the big end of the pin that expands is the cylinder identical with its cone outside diameter, and the cylinder outer end has to the angle.

5, the floating boring tool of dimension adjustable according to claim 1 is characterized in that: expand pin carbon constructional quality steel manufacturing, heat treatment 50～55HRC.