CN85205790U

CN85205790U - End milling cutter fitted with various changeable tips without grinding

Info

Publication number: CN85205790U
Application number: CN 85205790
Authority: CN
Inventors: 李旭淮
Original assignee: Yin Boxian
Current assignee: Yin Boxian
Priority date: 1985-12-03
Filing date: 1985-12-03
Publication date: 1986-08-06

Abstract

The utility model discloses a vertical milling cutter of throw-away and changeable series of cutter heads, composed of a shank and a cutter head. The cutter head is changeable, and the front end of the cutter head is provided with a plurality of changeable and throw-away blades. Each throw-away blade adopts the gripping mode of the center screw, and the blade can be fixed only by tightening a screw which is passing through the centre hole of the blade. Because of the simple fastening device of the blade, the length and the volume of the cutter head are reduced. Consequently, the cost of the cutter head is reduced, and the rigidity of the cutting tool is increased. The cutter head and the shank can carry out the sizing batch production according to the different dimensions and specifications, and the inventory level of the cutting tools can be reduced.

Description

End milling cutter fitted with various changeable tips without grinding

The invention belongs to a kind of metal-cutting machine tool.

It is assorted that but the slotting cutter of more advanced throw away change series of bits sees U.S. machinist

The 206th page of (American Machinist) the 4th phase of nineteen eighty-two.This kind slotting cutter is partly connect by shank portion and cutter head and forms, and handle of a knife is fastened on the milling machine, and cutter head then is interchangeable, and the cutter head front end is equipped with the interchangeable throw away chip of polylith.Because its cutter head is interchangeable, cutter head and handle of a knife can be done typing by different size, specification and produce in batches, so can reduce the tool magazine storage; Yet, because the device for fastening of its interchangeable throw away chip is comparatively complicated, taken the bigger space on the cutter head, make cutter head itself be difficult to settle again the hookup (for example opening internal thread) with handle of a knife, have to make the cutter head tail end that a thinner prolongation---cutter neck is arranged, on this cutter neck, settle hookup again with handle of a knife, make interchangeable cutter head in fact comprise cutter head and prolongation thereof---the cutter neck, length and volume have all seemed greatly, this has not only increased the material consumption and the cost of interchangeable part, also can reduce cutter integral intensity and rigidity, thereby make this Tool in Cutting consumption little, only be applicable to the low-power lathe.

Main points of the present invention at first are to improve and simplified the device for fastening of every interchangeable throw away chip, adopt the central screw clamping mode, promptly use a screw (3 in the accompanying drawing) to pass the centre bore of blade (4 in the accompanying drawing), directly blade is pressed on the bottom surface of cutter groove from top to bottom by head of screw when tightening screw, the rotation friction that produces between the upper surface of lower surface with blade of head of screw when relying on screw-driving simultaneously is close on the side of cutter groove the side of blade.Because this device for fastening has been eliminated the six-freedom degree of blade all sidedly, when blade bears the impact of powerful cutting force,, blade itself collapses broken phenomenon even taking place, the blade phenomenon that moves and turn a somersault can not appear yet, thereby tighten up reliably, saving under the situation of edge bearing, cutter can not damage yet; Every throw away chip as long as a screw just can tighten up, has saved edge bearing, reduced clamping element, reduced cost, main is, owing to simplify the structure, reduced the clamping element of pressing plate and so on, made the blade front reduce obstacle, guaranteed that chip removal is unobstructed; Because of tighten up reliable and chip removal unobstructed, so can improve cutting data.

Just, make the present invention be reduced the length and the volume of interchangeable cutter head owing to adopted this simple blade device for fastening.This be because, on cutter head, blade adds the blade device for fastening, shared space is smaller, make cutter head (2 in the accompanying drawing) that the leeway of arrangement hookup (for example opening internal thread) arranged itself and no longer need to prolong a cutter neck and handle of a knife connects, thereby make the interchangeable cutter head of this class slotting cutter partly reduce length and volume, reach the effect that strengthens rigidity and reduce cost.Because the simplification of blade device for fastening, in the less space of the arrangement blade that this just can have at the cutter head of certain size specification, adopt the relatively large blade of big as far as possible size, blade size is big, the groove width size of blade chip-breaker is just big, and this just can improve cutting data.

Connection between cutter head and the handle of a knife, adopt the spiral marking connection method, open internal thread (6 in the accompanying drawing) at the bottom of the cutter head tail, the front end of handle of a knife (1 in the accompanying drawing) has corresponding external screw thread (5 in the accompanying drawing), has a pair of breach that wrench is puted forth effort during for tool changing in the tail side of cutter head.The cutter head of this milling cutter can be made into the series specification of different-diameter, size difference according to tool bit diameter, internal thread is selected the standard specification of two kinds of sizes of size for use at the bottom of the cutter head tail, adapt therewith, handle of a knife is also made the standard specification of two kinds of sizes, this kind cutter is produced in batches with helping finalizing the design seriation, thereby can reduce the tool magazine storage.

In the accompanying drawing, 1-handle of a knife, 2-cutter head, 3-screw, 4-throw away chip, 5-external screw thread, 6-internal thread.

Claims

But 1, the slotting cutter of a kind of throw away change series of bits that cutter head constituted that can load and unload of throw away chip is housed by handle of a knife and front end, it is characterized in that each piece throw away chip of interchangeable cutter head front end all adopts the central screw clamping mode, pass the centre bore of a blade with a screw, when tightening screw, the lower surface of this head of screw is pressed on the upper surface of blade, this blade is pressed in the groove of cutter hub.
But 2, the slotting cutter of the described throw away change series of bits of claim 1, said cutter head are magnetic tape trailer end extension bodies not---the cutter neck, thereby cutter head to the connection position of handle of a knife on the cutter head rather than on the cutter neck.
But 3, the slotting cutter of claim 1 and 2 described throw away change series of bits is characterized in that the bind mode between cutter head and the handle of a knife is a spiral marking connection.
But 4, the slotting cutter of the described throw away change series of bits of claim 3, in said hookup, internal thread is opened at the bottom of the cutter head tail, and external screw thread is opened the front end at handle of a knife, has a pair of breach of putting forth effort for wrench in the tail side of cutter head.