WO2007033570A1 - A freely combined push broach - Google Patents

Abstract

A broach for cutting metal is disclosed. It relates to a freely combined push (or pull) broach, which is composed of broach holder or handle, a broach body consisting of multiple tooth blades. It is characterized is that each tooth blade is one single plate. Said broach blades are formed by cutting the teeth of multiple stacked blades, then the blades is overlapped reversibly and arranged axially to form said broach body. The body is either fixed on broach holder by fasteners at the end of said holder or passed through the handle by additional fasteners. Multiple single blades are applied on the present invention, so the cutting process is simple. It is easy to repair and economical dues to only exchange one when it being damaged, it is also convenient and timesaving to disassembly or assembly. By means of using different broach holders and tooth blades, man can process various contain surface or semi-contain surface, so it possesses wide application.

Description

 Free combination pusher

Technical field

 The invention belongs to a push cutter of a metal cutting tool, and particularly relates to a free combination pusher (or broach).

Background technique

 The push (pull) knife is a high-productivity, high-precision multi-tooth tool. When pushing (pulling), the push (pull) knife is used for constant-speed linear motion, because the latter (or a group) of the knife is high. The previous (or a set of) teeth are removed, so that the metal layer can be cut from the workpiece in sequence to obtain the desired surface. The usual push (pull) knife is an integral push (pull) knife. The whole cutter body is integrated. It needs to be printed one by one, and the negative angle is processed. The machining process is complicated, and the cutter body is easy to wear due to poor working environment. , need to be repaired one by one, and, partially damaged, the whole knife is scrapped, a lot of material is wasted.

 In order to solve the above problems of the overall push (pull) knife, the "mechanical clamping self-guided keyway broach" of the patent number 97207676. X published on January 6, 1999 discloses a combined broach, the broach The plurality of cutting tooth blades, the aligning tooth blades and the guide keys are fastened one by one by the fastening screws in the sipe on the cutter body, and the taper boring head and the aligning tooth blade at both ends of the cutting tooth insert are pressed by the conical surface on the fastening screw The taper of the end taper and the taper taper at both ends of the guide key secure the cutting blade, the aligning tooth blade and the guide key to the body. This patent realizes the concept of combined broach, but has the following problems: (1) The structure is complicated and the processing technology is cumbersome; (2) It needs to be installed one by one, and the assembly is unified, which brings a lot of inconvenience to the disassembly and replacement: (3) Each The tooth piece has a plurality of teeth in the axial direction, and also needs to be processed one by one, which is difficult to repair; (4) Only the wheel housing key groove can be broached, and cannot be used for broaching holes.

Summary of the invention

 SUMMARY OF THE INVENTION An object of the present invention is to provide a free combination pusher which is composed of a plurality of mutually independent single-piece blades, which is simple in processing, easy to repair, more material-saving, and has a wide application range.

 In order to achieve the above object, the present invention is achieved by the following technical solutions:

 A free combination pusher is designed, comprising a knife seat or a knife bar and a blade body composed of a plurality of mutually independent tooth pieces, wherein each tooth piece is a single piece tooth piece, and the tooth piece of the knife body The plurality of knives are superimposed and formed by one cutting tooth, and the arrangement order is completely reversed and then axially arranged to form the knive body. The knive body is fixedly disposed on the knives through the fasteners at the end of the turret, or is penetrated by the arbor The fasteners are fixedly disposed on the arbor.

The blade holder is axially disposed with an elongated guiding groove, and the blade body formed by the tooth plate is disposed in the guiding positioning groove, and is clamped and fixed by a fastening bolt, and the fastening bolt is axially disposed at the seat end. On the side wall of the section. Can be used to machine wheel housing keyways and so on. The teeth of the cutter body are rectangular.

 The cutter body is penetrated by a central shaft type cutter rod and fixed by a fastening bolt or a pin, and the cutter body axially is provided with a positioning hole matched with the cutter rod, and the shape of the positioning hole is polygonal, semicircular or Elliptical hole. Can be used to machine standard or shaped holes. The shape of the blade of the blade is the same as the shape of the desired hole or standard hole.

 Compared with the prior art, the invention has the following advantages:

 The single-piece tooth piece used in the cutter body of the invention has simple processing technology and is easy to repair; when it is damaged, only one piece is eliminated, material is saved; convenient assembly and disassembly, saving time; can be processed by adopting different forms of the knife seat and the tooth piece A variety of semi-contained surfaces and containment surfaces for a wide range of applications.

DRAWINGS

 Figure 1 is a schematic view of a combination of teeth of the present invention;

 2 is a schematic view showing the structure of a positioning groove type holder according to the present invention;

 Figure 3 is a schematic view showing the structure of a mandrel type arbor according to the present invention;

 4 is a schematic view of a tooth piece having a positioning hole of the present invention.

detailed description

 The present invention will be further described below in conjunction with the accompanying drawings:

 In the figure: 1 a knife seat; 2 - guide positioning groove; 3 - tooth; 4 a knife body; 5 - fastening bolt; 6 a positioning hole; 7 - knife bar.

 As shown in Fig. 1, the blade of the cutter body is formed by stacking a plurality of blanks through a single cutting tooth, each of the teeth is a single piece of teeth, each piece has the same shape, and the outer dimensions of the teeth are equal. Poor, and the teeth have the same taper. As shown in A, the arrangement is completely reversed and the axial arrangement constitutes the body. As shown by B, the teeth are presented one by one. In the repair, the order is restored to the original order. After the grinding or cutting process, a new cone is formed. After the order is reversed, the new body is formed and can be used continuously. This kind of tooth processing and repair are very Easy, when the teeth are damaged, only a single elimination, saving materials.

Embodiment 1

 As shown in FIG. 2, the blade holder 1 is axially disposed with an elongated guide groove 2, and a blade body 4 composed of a plurality of rectangular teeth 3 is disposed in the guide positioning groove, and is clamped and fixed by the fastening bolt 5. The fastening bolts are arranged axially on the side walls of the end of the seat. Can be used to machine wheel housing keyways and so on.

Embodiment 2

As shown in FIG. 3 and FIG. 4, the cutter body 4 is penetrated by a central shaft type cutter rod 7 and fixed by a fastening bolt 5, and each of the tooth pieces 3 is axially disposed with a positioning hole 6 matching the cutter rod. The shape of the positioning hole is a polygon, Semi-circular or elliptical. The shape of the blade of the blade body is the same as the shape of the profiled hole or the standard hole to be processed. When applied, the seat or the shank is unchanged. The cutter body made up of various shapes of teeth can process different cutting faces and reduce the cost. At the same time, good steel is used on the cutting edge to save high quality steel.

Claims

The invention relates to a free combination pusher, comprising a knife seat or a cutter bar and a cutter body composed of a plurality of mutually independent tooth pieces, wherein each tooth piece is a single piece tooth, the cutter body The tooth piece is formed by superimposing a plurality of pieces of the knives through a cutting tooth, and the arrangement order is completely reversed and then axially arranged to form the knive body, and the knive body is fixedly fixed on the knives by the fasteners at the ends of the knives, or by the knives. The rod is fixedly disposed on the arbor by a fastener. The free combination pusher according to claim 1, wherein the seat is axially disposed with an elongated guide groove, and the cutter body is disposed in the guide positioning groove and is clamped and fixed by the fastening bolt. The fastening bolts are arranged axially on the side walls of the end of the seat. A freely combined pusher according to claim 1 or 2, wherein the blade of the blade body is oblong. The free combination pusher according to claim 1, wherein the cutter body is penetrated by a central shaft type cutter rod and fixed by a fastening bolt or a pin, and the cutter body is axially disposed and the cutter bar Matching positioning holes, the positioning holes are polygonal, semi-circular or elliptical. A freely combined pusher blade according to claim 1 or 4, wherein the blade body has the same shape as the profiled hole or the standard hole to be machined.