CN207771019U - A kind of forming internal threads cutter - Google Patents

Abstract

One end of a kind of forming internal threads cutter, including knife bar, knife bar is set there are one interconnecting piece, and the interconnecting piece is used to be connected with operation hand lever.The other end of knife bar is equipped with several circle screw thread extrusion forming swords in an axial direction.Often circle screw thread extrusion forming sword includes several segment screw thread extrusion forming swords, the major diameter and path of each segment screw thread extrusion forming sword are respectively greater than the major diameter and path of the internal thread to be processed into, the bottom of the V-shaped transition of adjacent two segments screw thread extrusion forming sword, V-arrangement is round-corner transition again.Advantage is：Screw thread is compressed by workpiece material to be made, material texture only changes trend and is not cut or interrupts, the bottom of root, that is, V-arrangement of screw thread is round-corner transition again, stress concentration can be effectively reduced, therefore the intensity and service life of screw thread side and root all can highers compared with the screw thread of cutting forming.

Description

A kind of forming internal threads cutter

Technical field

The utility model is related to a kind of cutters of machining internal thread.

Background technology

Existing internal thread machining mainly has three kinds of turning, milling and tapping methods.Turning is used for processing revolving body zero Part is clipped in part on machine tool chief axis by scroll chuck, and rotates, and then uses lathe tool along the busbar feed of revolving body, cuts out Product shape comes.Endoporus can be also carried out on lathe, screw thread, the processing of texture etc., both rear is that low speed is processed.And milling is by hair Base is fixed, and the feed on blank with high-speed rotating milling cutter cuts out the shape and feature of needs.Traditional milling is more used for milling Simple shape/the feature such as profile and slot.CNC milling machine can carry out the processing of complex appearance and feature and adding for internal thread Work.Tapping is then commonly used in the processing of small-bore screw hole.But the above processing method is all a kind of cutting working method, is had Oneself the shortcomings that.

Application number：201210117452.9 Authorization Notice No.：102615362 B of CN, entitled " internal thread machining side The Chinese invention patent file of method " discloses a kind of female thread machining method：" knife bar is installed on lathe, knife bar both ends are fixed, Knife bar one end is mounted on the chuck of lathe spindle, and the knife bar other end is mounted on bearings, and chuck is mounted on lathe spindle, Blade is provided on knife bar；The workpiece of internal thread to be processed is mounted on knife rest, and knife rest is mounted in the sliding box of lathe, works as knife When bar drives rotation with blade thereon by main shaft, generatrix direction of the workpiece with knife rest under the drive of sliding box on knife bar It moves in a straight line, in motion process, the blade for being located at the middle vacancy of workpiece carries out screw thread process to workpiece inner wall when rotated.” According to the explanation of the invention text, the advantages of invention, is：" increases to knife bar and support, first had to increase support to knife bar Change the motion mode of cutter and workpiece, this method allows cutter only to rotate while allowing between workpiece and cutter and only does relatively Linear motion." but the inventive nature on do not have be detached from be driven machining technology, during continuous excision material A large amount of chips are will produce, especially in the workpiece material that workhardness is relatively low, viscosity is larger, chip is easily gathered, and influences to process Efficiency and quality.

Invention content

The main inventive purpose of the utility model is to provide one kind without machining to carry out forming internal threads operation Cutter.

Technical solution used in the utility model is：A kind of forming internal threads cutter, including knife bar, one end of knife bar are equipped with One interconnecting piece, the interconnecting piece with operation hand lever for being connected.The other end of knife bar is equipped with several circle screw threads and squeezes in an axial direction Molding blade.Often circle screw thread extrusion forming sword includes several segment screw thread extrusion forming swords, each segment screw thread extrusion forming sword Major diameter and path are respectively greater than the major diameter and path for the internal thread to be processed into, and adjacent two segments screw thread extrusion forming sword is in V Shape transition.

The utility model is to pass through transfer（It is non-cutting）Workpiece material, by one-pass, squeeze out screw thread in a manner of obtain Final thread size is suitable for the screw thread of the screw thread process and cutting forming processing of the material with preferable ductility It compares, the screw thread that the utility model is obtained is more bright and clean（Without processing chatter mark）, form with U at the molding Major Diam of institute The thread form of shape feature, but the tensile strength of screw thread is had no effect on, it is made since screw thread is compressed by workpiece material, material Material texture only change trend and be not cut or interrupt, therefore the intensity and service life of screw thread side and root with cut Molding screw thread is cut compared to meeting higher.

Preferably, the bottom roundings transition of V-arrangement.Further preferably, two segment screw thread extrusion forming sword of radially adjoining Major diameter both ends pointed end be fillet, two smooth-sided compression candles transition of the path of each segment screw thread extrusion forming sword.This Preferred embodiment advantageously reduces stress concentration, improves the intensity of the utility model, and then improves the use longevity of the utility model Life.

Preferably, often circle screw thread extrusion forming sword includes four segments, six segments or eight segment screw thread extrusion forming swords.Into One step it is preferred, often enclose screw thread extrusion forming sword be made of six segment screw thread extrusion forming swords.

Preferably, the bottom diameter of screw thread extrusion forming sword is more than or equal to 1 point 2 millimeter of the diameter of knife bar.This preferred side Case, reasonable for structure, service life is long, and it is big to be applicable in pore diameter range.

Preferably, interconnecting piece main body is four prisms cylinder, corresponding operation hand lever is equipped with and four prisms cylinder adaptation Tetragonous post holes.Further preferably, the end of interconnecting piece is equipped with threaded hole, anticreep baffle and the screw with threaded hole adaptation. The connection structure of this preferred embodiment, operation hand lever and knife bar is simple, firm.

In conclusion the utility model has the beneficial effects that：Screw thread is compressed by workpiece material to be made, material line Reason only changes trend and is not cut or interrupts, and the bottom of root, that is, V-arrangement of screw thread is round-corner transition again, can be effective Stress concentration is reduced, therefore the intensity and service life of screw thread side and root all can highers compared with the screw thread of cutting forming.

Description of the drawings

Fig. 1：The structural schematic diagram of the utility model；

Fig. 2：The upward view of the utility model；

In figure：Knife bar 1, interconnecting piece 1.1, threaded hole 1.2, screw thread extrusion forming sword 2, segment screw thread extrusion forming sword 2.1.

Specific implementation mode

Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.

As shown in Figure 1 and Figure 2, the utility model includes knife bar 1, and one end of knife bar 1 sets that there are one interconnecting piece 1.1, the companies Socket part with operation hand lever not shown in the figure for being connected.The other end of knife bar 1 is equipped with several circle screw thread extrusion formings in an axial direction Sword 2, it includes several segment screw thread extrusion forming swords 2.1, each segment screw thread extrusion forming sword often to enclose screw thread extrusion forming sword 2 2.1 major diameter and path is respectively greater than the major diameter and path for the internal thread to be processed into, and axially adjacent two segments screw thread squeezes 2.1 V-shaped transition of molding blade, further, the bottom roundings transition of V-arrangement, two segment screw thread extrusion forming sword 2.1 of radially adjoining Major diameter both ends pointed end be fillet, two smooth-sided compression candles transition of the path of each segment screw thread extrusion forming sword 2.1. The specific structural details of screw thread, because being simple technique, this will not be repeated here.Often circle screw thread extrusion forming sword 2 includes four segments, six Segment or eight segment screw thread extrusion forming swords 2.1, the present embodiment often enclose screw thread extrusion forming sword 2 by six segment screw thread extrusion formings Sword 2.1 is constituted.The bottom diameter of screw thread extrusion forming sword 2 is more than or equal to 1 point 2 millimeter of the diameter of knife bar 1,1 diameter of general knife bar Bigger, the difference of the bottom diameter of screw thread extrusion forming sword 2 and the diameter of knife bar 1 can also obtain greatly accordingly, to save About material, and can guarantee that knife bar 1 has enough rigidity to ensure processing quality.

Preferably, 1.1 main body of interconnecting piece is four prisms cylinder, corresponding operation hand lever is equipped with and the four prisms cylinder is suitable The tetragonous post holes matched.The end of interconnecting piece 1.1 is equipped with threaded hole 1.2, anticreep baffle not shown in the figure and is fitted with threaded hole 1.2 Operation hand lever is fixed on knife bar by the screw not shown in the figure matched, operation hand lever by threaded hole 1.2, anticreep baffle and screw On 1.

The specific embodiment of the above is only the preferable embodiment of the utility model, and not limits this practicality with this Novel specific implementation structure and practical range.In fact, according to shape, structure and purpose of design described in the utility model Some equivalent variations can be made.Therefore, all according to made by shape, structure and purpose of design described in the utility model Some equivalence changes ought to be all contained in the scope of protection of the utility model namely these equivalence changes all should be by this reality With novel protection.

Claims (9)

1. a kind of forming internal threads cutter, including knife bar（1）, knife bar（1）One end set there are one interconnecting piece（1.1）, the company Socket part is used to be connected with operation hand lever, it is characterized in that：Knife bar（1）The other end in an axial direction be equipped with several circle screw thread extrusion forming swords （2）, often enclose screw thread extrusion forming sword（2）Including several segment screw thread extrusion forming swords（2.1）, each segment screw thread extrusion forming Sword（2.1）Major diameter and path be respectively greater than the internal thread to be processed into major diameter and path, axially adjacent two segments screw thread Extrusion forming sword（2.1）V-shaped transition.

2. a kind of forming internal threads cutter according to claim 1, it is characterized in that：The bottom roundings transition of V-arrangement.

3. a kind of forming internal threads cutter according to claim 1, it is characterized in that：Two segment screw thread of radially adjoining is squeezed into Type sword（2.1）Major diameter both ends pointed end be fillet.

4. a kind of forming internal threads cutter according to claim 1, it is characterized in that：Each segment screw thread extrusion forming sword （2.1）Path two smooth-sided compression candles transition.

5. a kind of forming internal threads cutter according to claim 1, it is characterized in that：Often enclose screw thread extrusion forming sword（2）Packet Include four segments, six segments or eight segment screw thread extrusion forming swords（2.1）.

6. a kind of forming internal threads cutter according to claim 4, it is characterized in that：Often enclose screw thread extrusion forming sword（2）By Six segment screw thread extrusion forming swords（2.1）It constitutes.

7. a kind of forming internal threads cutter according to claim 1, it is characterized in that：Screw thread extrusion forming sword（2）Bottom it is straight Diameter is more than or equal to knife bar（1）1 point 2 millimeter of diameter.

8. a kind of forming internal threads cutter according to claim 1-6 any one, it is characterized in that：Interconnecting piece（1.1）It is main Body is four prisms cylinder, and corresponding operation hand lever is equipped with and the tetragonous post holes of four prisms cylinder adaptation.

9. a kind of forming internal threads cutter according to claim 7, it is characterized in that：Interconnecting piece（1.1）End be equipped with spiral shell Pit（1.2）, anticreep baffle and and threaded hole（1.2）The screw of adaptation.