CN205968358U - Straight tensioning type interface of screw thread - Google Patents

Abstract

An object of the utility model is to provide a straight tensioning type interface of screw thread, including cutter arbor and handle of a knife, the cutter arbor front portion includes by preceding external screw thread portion that sets gradually after to and short pyramis, end part of the tool holder is equipped with internal thread portion and awl chamber portion with the anterior looks adaptation of cutter arbor in proper order, and cup joint in end part of the tool holder the cutter arbor front portion. The utility model discloses a short conical structure auto -lock and screw thread fit connection are taut, can improve the assembly precision, reduce the area of contact of the conical surface and screw -thread fit's area of contact simultaneously.

Description

A kind of screw thread vertical pulling compact form interface

Technical field

This utility model belongs to Machining Technology for Cutting field and in particular to a kind of screw thread vertical pulling compact form interface.

Background technology

The selection of mounting and clamping system is one of important content in Digit Control Machine Tool configuration, and it not only affects the production of Digit Control Machine Tool Efficiency, and directly affect the crudy of part.Reasonable selection mounting and clamping system, can obtain under an economical condition and get twice the result with half the effort Effect.Modular mounting and clamping system by be mounted directly the handle of a knife module being fixed on machine tool chief axis, the middle knife bar module connecting, The cutter module three part composition of head clamping, gets final product the different types of cutter of clamping, pin by the knife bar module of different size To different processing parts and lathe, taking different assembling schemes, thus improving adaptability and the utilization rate of handle of a knife, meeting Various process requirements.But, in modular mounting and clamping system, generally pass through between handle of a knife module and knife bar module to run through therebetween Stretching screw connect, screw reverse drawing, screw thread coordinate contact surfac is big, and dismounting is extremely inconvenient, and processing and making process is also relatively difficult.

Utility model content

The purpose of this utility model is to provide a kind of screw thread vertical pulling compact form interface, is joined using short wimble structure self-locking and screw thread Close and connect tension, it is possible to increase assembly precision, reduce the contact area of the conical surface and the contact area of screw thread cooperation simultaneously.

The technical solution of the utility model is：

A kind of screw thread vertical pulling compact form interface, including knife bar and handle of a knife, described knife bar is anterior to be included setting gradually from front to back External thread part and short tapering, described handle of a knife end be sequentially provided with the internal thread part being adapted with knife bar front portion and cone chamber portion, knife Bar front portion is socketed in handle of a knife end.

Above-mentioned screw thread vertical pulling compact form interface, described external thread part cylindrical and along its cylindrical circumferential direction uniformly some with The parallel plane of its longitudinal center line.

Above-mentioned screw thread vertical pulling compact form interface, described short tapering is in coniform and taper ratio is 1:20.

Above-mentioned screw thread vertical pulling compact form interface, the pitch of described external thread part is 0.8 ~ 2.0mm.

Above-mentioned screw thread vertical pulling compact form interface, is provided with transition groove between described external thread part and short tapering.

The beneficial effects of the utility model：

This utility model mainly makes knife bar by exquisite structure design at two and handle of a knife carries out the conical surface simultaneously and end face is joined Close, it is ensured that accurately reliable centering by the way of dual contact clamping,

（1）This utility model devises external thread part in knife bar front portion, the internal thread part of external thread part and handle of a knife end to Cooperation carries out threaded, and therefore, this utility model is without using through the stretching screw between handle of a knife and knife bar, you can real The cooperation tension of existing handle of a knife and knife bar, on the one hand decreases use and the cooperation position of parts, thus decrease precision reducing Generation position, specifically：During using stretching screw, stretching screw will be threadeded with handle of a knife and knife bar, has two Place's screw thread cooperation, and in this utility model, only handle of a knife is threadeded with knife bar, screw thread cooperation at only；On the other hand adopt With the fit system of stretching screw, not only need to process the stretching screw of high intensity, also will process inside handle of a knife and knife bar Screwed hole, processing technique is complicated, and difficulty of processing is high, and processing technique complexity of the present utility model substantially reduces, and this subtracts again Lack the probability of happening of mismachining tolerance, advantageously ensure that quality of fit；

What is more important, this utility model has also carried out many places to external thread part and has been specifically designed：1. in external thread part Surface mills out plane that is some equally distributed and paralleling with its longitudinal center line, reduces thread contact area, improves cooperation Precision；2. major diameter of thread reduces, and central diameter reduces, and depth of threat increases, and reduces dismounting difficulty, is easy to cutter changing, with like product phase Than, in the case of ensureing same precision, this utility model energy quick-replaceable, reduces replacing construction, improves efficiency, also drop simultaneously The low probability that loss of significance occurs in disassembly process；3. threaded portion special handling, thread surface is machined with carbo-nitriding Layer, main purpose is to improve screw strength, wearability and fatigue strength, it is to avoid using in process and disassembly process to threaded portion Damage, enable this utility model to keep higher quality of fit for a long time.

（2）Short taper design described in the utility model is conus portion, can conveniently realize high precision fixed core, knife bar and knife Handle carry out simultaneously the conical surface and end face cooperation, using dual contact clamping by the way of, exactly because also this positioning mode it is ensured that Accurately reliable centering is so that this utility model can be completely eliminated axially position error when connecting knife bar and handle of a knife； The design in above-mentioned short tapering, has the advantages that surface area is big and precision stability is good, therefore operationally, the anterior surface of knife bar Pressure is low, be unlikely to deform, wear and tear little, is effectively guaranteed precision and the durability of interface, and then improves machining accuracy and production Efficiency；Conical structure is designed on knife bar rather than on handle of a knife, so just need not be limited by machine tool chief axis interface, all can be with Used tool type is changed on meaning ground, and comparatively handle of a knife is determined based on machine tool chief axis, can only use lathe master Handle of a knife specified by axle；It is 1 that knife bar front portion is designed as taper ratio:20 Small Taper, the self-lock force of this structure is much larger than other The self-lock force of structure, more reliability, can conveniently realize high precision fixed core, and knife bar front portion is socketed on handle of a knife end Interior, cylindrical in the middle part of knife bar, its end face is fitted close with handle of a knife end, simultaneously constitutes the conical surface and end face cooperation, cone match Ensure that the radial positioning precision of interface, end face cooperation ensure that axially position precision and the axial rigidity of interface, thus enters one Step ensure that the concentricity of knife bar and handle of a knife.

（3）In addition this utility model need not arrange driving key or polygon gets final product transmitting torque, and stress concentration is little, pass Torque delivery is big, also reduces the risk of loss of significance, decreases production cost, and this utility model is not because having pin connection, drive Dynamic bonded or polygon such as connects at the part, does not therefore exist using the distortion problem driving key etc. to cause, in almost all Tool system attachment structure in, be all generally to rely on to drive key transmitting the cutting moment of torque, this can produce stress on driving key Concentrate, and thus can reduce the service life of tool system, drive key and phase error that keyway fit clearance is brought can make Obtain positioning precision to decline；And this utility model adopts this symmetrical structure no driving key and keyway of cone shape short wimble structure, Key need not be driven to be evenly distributed transmitting the cutting moment of torque, the cutting moment of torque, be conducive to improving its torsional rigid；

（4）Cylindrical in the middle part of knife bar, be to be fitted close between its end face and handle of a knife end, knife bar anterior with handle of a knife end Between be also to be fitted close, above-mentioned fit system not only achieves handle of a knife and knife bar carries out the two-sided of the conical surface and end face cooperation simultaneously The mode of positioning clamping, also ensure that the conical surface and the high laminating rate of end face, can make in the middle part of knife bar and the end of handle of a knife between And knife bar is anterior forms gapless positioning and handle of a knife end between, it is to avoid the interface that the presence in gap leads to connects precision Reduce, avoid loss in transmittance process for the moment of torsion simultaneously；

In addition this utility model has excellent cross-sectional strength, can be using higher clamping force, so that it is guaranteed that excellent is anti- The blade precision of cutter that is curved rigid and using described interface and repetitive positioning accuracy；This utility model is also dependent on different knives Tool diameter, to change the size of itself it is adaptable to polytype cutter such as plain cutter, boring cutter, rose cutter etc., needs When changing cutter, handle of a knife is not affected, and the cutter being continually changing only needs the replacing by knife bar, can be achieved with exchanging and wants Ask, greatly optimize quick-replaceable operation and the toolsetting time of cutter, reduce the cost of handle of a knife replacing, so that this practicality New series modularity.

Brief description

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the structural representation of knife bar in Fig. 1；

Fig. 3 is the A-A sectional view of Fig. 2；

Fig. 4 is the structural representation of handle of a knife in Fig. 1；

1 knife bar rear portion；In the middle part of 2 knife bars；3 short taperings；4 transition groove；5 external thread parts； 6 planes；7 handle of a knifes；8 cone chambeies；9 internal thread parts；10 back chipping grooves.

Specific embodiment

For making technical purpose of the present utility model, technical scheme and technique effect clearer, below in conjunction with the accompanying drawings and tool Body embodiment makes specific description to the technical solution of the utility model：

As shown in Figures 1 to 4, a kind of screw thread vertical pulling compact form interface, including knife bar and handle of a knife, described knife bar is included for installing In the middle part of the knife bar rear portion 1 of cutter, knife bar 2 and knife bar anterior, in the middle part of knife bar, 2 is cylindrical, and described knife bar front portion is included by front To after the external thread part 5 that sets gradually and short tapering 3, be provided with transition groove 4 between described external thread part 5 and short tapering 3.Described Handle of a knife 7 end is sequentially provided with the internal thread part 9 being adapted with knife bar front portion and cone chamber portion 8, and knife bar front portion is socketed on handle of a knife 7 end Interior, in the middle part of knife bar, 2 are coordinated with handle of a knife 7 end end face.Described short tapering 3 is in coniform and taper ratio is 1:20.Described external screw thread Portion 5 is cylindrical and along its cylindrical circumferential direction plane 6 that uniformly some longitudinal center lines with external thread part 5 are paralleled, described The pitch of external thread part 5 is 1.5mm, and the surface of external thread part 5 is provided with carbonitrided case.Set between internal thread part 9 and cone chamber portion 8 There are back chipping groove 10, the position of back chipping groove 10 and size vertically corresponding with transition groove 4, to ensure external thread part 5 and interior The complete cooperation of threaded portion 9.

During use, by anterior for the knife bar end screwing in handle of a knife 2 until being socketed in handle of a knife 2 end so as to closely join completely Close, thus constitute vertical pulling compact form interface.When needing to change cutter, knife bar is screwed out, more changing knife rod can be achieved with the replacing of cutter, Greatly optimize quick-replaceable operation and the toolsetting time of cutter.

It should be noted last that：Above-described embodiment is merely to illustrate and unrestricted the technical solution of the utility model, appoints Equivalent and the modification without departing from this utility model spirit and scope or local replacement that what is carried out to this utility model, it is equal Should cover within this utility model protective scope of the claims.

Claims (5)

1. a kind of screw thread vertical pulling compact form interface, including knife bar and handle of a knife it is characterised in that：Described knife bar is anterior to be included from front to back The external thread part setting gradually and short tapering, described handle of a knife end is sequentially provided with the internal thread part being adapted with knife bar front portion and cone Chamber portion, knife bar front portion is socketed in handle of a knife end.

2. screw thread vertical pulling compact form interface according to claim 1 it is characterised in that：Described external thread part is cylindrical and edge Its cylindrical circumferential direction uniformly some planes paralleled with its longitudinal center line.

3. screw thread vertical pulling compact form interface according to claim 1 and 2 it is characterised in that：Described short tapering be in coniform and Taper ratio is 1:20.

4. screw thread vertical pulling compact form interface according to claim 1 it is characterised in that：The pitch of described external thread part be 0.8 ~ 2.0mm.

5. screw thread vertical pulling compact form interface according to claim 1 it is characterised in that：Between described external thread part and short tapering It is provided with transition groove.