CN2091199U

CN2091199U - Polygon occupied pushing cutting tool

Info

Publication number: CN2091199U
Application number: CN 91215313
Authority: CN
Inventors: 张德煊; 贺文龙
Original assignee: Shanghai Machine Tool Parts Factory No1
Current assignee: Shanghai Machine Tool Parts Factory No1
Priority date: 1991-04-08
Filing date: 1991-04-08
Publication date: 1991-12-25

Abstract

The utility model discloses an occupied pushing cutting tool with polygonal holes or shafts, which is composed of a handle, a shell, a bearing, a mandrel, an occupied pushing knife, etc. The utility model is a cutting tool which can flexibly swing and turn. The section shape and dimension of the occupied pushing knife are the section shape and nominal size of processed work piece. The tool can be both used on machine tools of lathes, drill presses, milling machines, etc. The utility model has the advantages of high efficiency, low energy consumption and low noise, providing a brand new polygonal processing approach.

Description

Polygon occupied pushing cutting tool

The utility model belongs to the machining instrument of polygonal hole or polygon shaft.The polygonal hole during modern industry is produced or the processing of polygon shaft, the general employing planed, milling, broaching, slotting, punch forming, profile tracer processing, and electrolysis, Wire-cut Electrical Discharge Machining etc. are in all these processing methods, all be subject to processing the precision of part, shape, material, quantity, all multifactor restrictions such as cost, the conditions and environment that they all have separately to be suitable for, with regard to the processing of the polygonal hole of the small size of general material or polygon shaft, the production efficiency that has in the said method is extremely low, the special equipment of the needs costliness that has, production cost is higher, to some blind hole processing, just is subjected to more having limited especially.

The purpose of this utility model is for also uneconomical adopting aforementioned conventional method processing polygonal hole or axle, unreasonable again when feasible, can design provides a kind of simple in structure, easy and simple to handle, the cutting element of wide adaptability and efficient and cheap makes it have preferable technical economic benefit.

At first machining principle of the present utility model is described below:

As shown in Figure 1 and Figure 2, OA is a main shaft handle body axial line among the figure, and OB is the axial line of cutter T, and they intersect at the O point and form angle δ; Z is the horizontal plane of ordering by O; The vertical OB of the end face of cutter T and by the O point; As above structure is when the OA axle rotates, the OB not rotation of axle of cutter T but do rotation around the OA axle, and form the garden awl track that drift angle is 2 δ.Will be as the point on the figure blade 1 and point 2 with the residing position of OB axle, thus the downward incision displacement △ in relative Z plane alternately produced ₁And △ ₂Obviously, when the OB axle is done 360 ° of rotation campaigns that repeat not stop around the OA axle, each point that then forms continuous path on the blade all will produce the downward incision campaign in relative Z plane successively with the swing of OB axle in original direction and position, if blade has rational cutting angle, this incision campaign will produce cutting effect; Follow the continuous feed motion of OA axle simultaneously, the cutting effect of cutting into motion like this and being produced just can extend to needed size range; To carry out in order cutting smoothly, to account in polygonal hole and push away first being processed and connect garden, the end in must preemption going out; Account at polygon shaft and to push away first being processed, must make garden, the external end earlier.The workpiece cross sectional shape that processing is obtained will be identical with the cutting blade cross sectional shape, and can obtain quite high dimensional accuracy.The as above this pendulum that pushes and plugs that is similar to is cut processing we is referred to as meaning and accounts for and push away machining, and the cutting element that designs with this is called to account for and pushes away cutting element.

Below in conjunction with embodiment architectural feature of the present utility model is narrated: Fig. 3 is that accounting for of polygonal hole pushes away cutting element, mainly by handle body (1) shell (2), and bearing (3), mandrel (4) accounts for push broach compositions such as (5).It is characterized in that accounting for push broach (5) is clamped in the mandrel (4), mandrel (4) is fixing in the inner ring hole of bearing (3), and link with handle body (1) by the screw thread of bearing (3) and shell (2), make to account for push broach mandrel, bearing inner race opposite shell and the rotation flexibly of handle physical efficiency do; Account for push broach (5), mandrel (4), axial line OB that bearing (3) is constituted and the axial line OA of handle body (1) and form swing angle δ, and the O that intersects at a point.When the handle body rotates, mandrel (4) with account for push broach (5) relative handle body (1) axial line done rotation, after accounting for push broach end face blade contact workpiece, then produce the incision motion thereupon, thereby accounting for push broach no longer produces from transferring only to do pure oscillating motion, cooperate the handle axon to feeding, make this accounting for push away the degree of depth that cutting reaches to be needed.

Feature of the present utility model also is to account for the cross sectional shape of push broach and cross sectional shape and the nominal size that size is exactly work piece; Its cross sectional shape can be a triangle, square, hexagon, quincunx etc.

Account for push broach, mandrel and handle body binding formation swing afterwards angle δ for making, the head II of handle body of the present utility model (1) and shank I have angle of deviation δ and accurate eccentric throw E(shown in figure four), in order to make the end face that accounts for push broach more accurately by the O point, central lumen at mandrel (4) is provided with two adjustment screw (12), make the blade end face that accounts for push broach after limit O point position by adjustment screw (12), use screw (6) will account for push broach again and tighten up, can finish adjustment work very easily like this.Whether the blade end face that accounts for push broach crosses intersection point O, will directly influence the error size of processing dimension.

When the utility model used on drilling machine, milling machine, boring machine, workpiece should be fixed on workbench, accounted for the instrument of pushing away and then should tighten up on machine tool chief axis and rotate, and accounted for push broach and only made swing of garden week and axial feed, and its class of operation is like drilling processing.

When the utility model was used on lathe, workpiece clamped in the chuck of lathe and rotates, and accounts for the instrument of pushing away and then tighten up and do axial feed on tailstock or knife rest, and accounting for push broach will cut into workpiece rotation synchronously and swing.(7) are for adjusting packing ring among the figure one, making some different-thickness sizes chooses from, make that the assembling of bearing (3) inner ring and mandrel (4) time can be eliminated end play, (8) are the standard component back-up rings, (9) be to end loose nut, prevent that shell and handle body from unclamping, (10) be fastening bolt, end tight piece (11), stop the loosening of nut (9) with plastics.

Fig. 5 is the embodiment that the utility model is used to process polygon shaft, and it is basic identical that its structure and Fig. 3 are used to process the embodiment of polygonal hole, only accounts for push broach 5 and be different from the hole with accounting for push broach; And two adjustment screw in mandrel (4) inner chamber have been saved; Axle need rely on the dimension chain precision to guarantee that the push broach end face is by two axial line intersection point O with accounting for push broach.

As above the instrument of pushing away that accounts for of structure has following obvious advantage:

1. simple in structure, set of tools part seldom, good manufacturability is so cost is also cheaper.

2. applicability is strong, can use on multiple lathes such as lathe, drilling machine, milling machine, boring machine; Because the cross sectional shape of workpiece is identical with the cross sectional shape that accounts for push broach, therefore on above-mentioned machine tool, use the processing of the hole that can finish triangle, quadrangle, hexagon, multiple cross sectional shape such as quincunx and axle, even can carry out nonlinear type, the processing of non-garden curved section; Be particularly suitable for blind hole processing.

3. easy and simple to handle, be similar to general account for hole process operation, as easy as rolling off a log penetration and promotion.

4. as long as connect Di Yuan hole or garden axle of the external end in making before pushing away processing accounting for, can reach the minimizing chipping allowance, obtain higher production efficiency, and obtain higher processing precision.To the blind hole processing of complicated shape, working (machining) efficiency of the present utility model is very high especially, and its superiority is particularly evident.

5. the utility model cutting energy consumption all has obviously with noise ratio routine cutting process and reduces.

In sum, the utility model provides a kind of brand-new polygon manufacturing process, has very significant technical economic benefit.

Below in conjunction with legend embodiment of the present utility model is further described below: Fig. 3, shown in Figure 5 account for the handle body shown in the instrument of pushing away and the figure four, its rotation angle or angle of deviation δ generally get 55 '～1 ° 30 '; The eccentric throw E of handle body head II generally gets 1.4～1.6 millimeters; The binding handle φ D of its handle body has garden post staight shank and two kinds of patterns of garden taper shank, has formed various sizes in an embodiment, can select for use for the user, and concrete parameter sees Table one.Account for the most frequently used positive square and the regular hexagon of its cross sectional shape of push broach (5) among Fig. 3, Fig. 5, all implemented and formed series at present, concrete parameter also sees Table one.

When using the utility model to account for to push away the processing polygonal hole, the diameter D=blade inscribe garden of prefabricated bottom outlet or be slightly larger than the inscribe garden, precision H11,60 °～90 ° of aperture chamferings, the degree of depth of pre-manufactured hole pushes away the degree of depth if blind hole then should account for greater than 1.5 times; When the processing polygon shaft, prefabricated garden column diameter D of the external end can be slightly less than the external garden of polygonal cross-section, and axle head also should have 60 °～90 ° chamferings.

The cutting parameter of recommending (to push away machining hole be example to account for) is as follows:

Rotating speed: be equivalent to the high-speed steel drill rotating speed

The amount of feeding: 0.05～0.15mm/rpm

Brill pushes away the degree of depth≤1.5 * blade across flats

The precision of the foregoing description processing hex hole is the D12 level.

Claims

1, a kind of polygonal hole or accounting for of axle push away cutting element, by handle body (1), shell (2), bearing (3), mandrel (4) accounts for push broach compositions such as (5), and feature of the present utility model is to account for push broach (5) to tighten up on mandrel (4), and by bearing (3), shell (2) with screw thread and handle body (1) carry out can relative flexible rotation binding; Account for push broach, axial line OB that mandrel, bearing constituted and handle body axial line OA and form swing angle δ, and the O that intersects at a point; Account for the vertical OB of end face of push broaching sword and cross the O point.

2, as claimed in claim 1 accounting for pushes away cutting element, and feature of the present utility model is that the cross sectional shape and the size that account for push broach are exactly needed cross sectional shape of work piece and nominal size.

3, push away cutting element according to claim 1 and 2 described accounting for, feature of the present utility model is that the cross sectional shape that accounts for push broach is a triangle, square, hexagon and quincunx etc.

4, as claimed in claim 1 accounting for pushes away cutting element, and feature of the present utility model is that the shank I and the head II of handle body forms axial line angle of deviation δ, and forms accurate eccentric throw E at the end face of head II.

5, as claimed in claim 1 accounting for pushes away cutting element, feature of the present utility model be the relative OA of axial line OB swing angle δ=55 '～1 ° 30 '.

6, push away cutting element as claim 1 and 4 described accounting for, feature of the present utility model be handle body shank I and head II axial line angle of deviation δ=55 '～1 ° 30 ', eccentric throw E=1.4～1.6mm.