CN110340394A

CN110340394A - A kind of expansion force central spindle tooling

Info

Publication number: CN110340394A
Application number: CN201910715059.1A
Authority: CN
Inventors: 张广辉
Original assignee: Guizhou Fengyang Hydraulic Ltd Co Ltd
Current assignee: Guizhou Fengyang Hydraulic Ltd Co Ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2019-10-18

Abstract

The invention discloses a kind of expansion force central spindle toolings, belong to lathe clamping tool, including mandrel, screw；The expanding end of the mandrel is separated into several expansion pieces along the slot of axial parallelly distribute on by several, and the trench bottom is circle；It is equipped with the internal screw thread being screwed into for screw in the expanding end, and is equipped with inner conical surface in expanding end end face, the head of the screw is equipped with the male cone (strobilus masculinus) cooperated with inner conical surface, so that screw moves radially expansion piece along mandrel after being screwed into.The present invention can meet part subsequent multiple working procedure processing by single Internal hole positioning, and accurate positioning it is quick, it is easy to loading and unloading, save the time.

Description

A kind of expansion force central spindle tooling

Technical field

The present invention relates to a kind of lathe clamping tools, and in particular to a kind of expansion force central spindle tooling.

Background technique

Fixture is used to fix processing object during referring to machine-building, is allowed to occupy correct position, to receive construction Or the device of detection, also known as fixture.In a broad sense, any process in technical process is used to rapidly, easily and safely The device for installing workpiece, all can be described as fixture.Fixture is usually by setting element (determining correct position of the workpiece in fixture), folder Tight device (makes workpiece exist knife induction element (relative position or the guiding tool orientation that determine cutter and workpiece), indexing means The processing that several stations can be completed in once mounting, have circular index device and linear movement two class of indexing means), connecting element And the composition such as clamp body (fixture base).

In the machine tooling of the prior art, in the multiple tracks difference process processing of certain special workpieces, it is multiple fixed to need Position tooling (such as: the technique that turning, screw thread, inner chamfer etc. often occur often in same workpiece while occurring), no Only time-consuming and laborious in the handling of tooling and when different processes use different toolings instead, positioning will appear deviation, process (especially cover parts) are easy to cause workpiece unqualified when geometric accuracy requires high, result in waste of resources.

Summary of the invention

For the drawbacks described above for overcoming the prior art, the present invention is intended to provide a kind of structure is simple, accurate positioning, easy to loading and unloading Expansion force central spindle tooling.

To achieve the goals above, the present invention adopts the following technical scheme:

A kind of expansion force central spindle tooling, including mandrel, screw；The expanding end of the mandrel is by several along axial parallelly distribute on Slot be separated into several expansion pieces, the trench bottom is circle；The internal screw thread being screwed into for screw is equipped in the expanding end, and It is equipped with inner conical surface in expanding end end face, the head of the screw is equipped with the male cone (strobilus masculinus) cooperated with inner conical surface, so that after screw is screwed into Move radially expansion piece along mandrel.

Preferred: the number of the slot and expansion piece is three.

Preferred: the inner conical surface of the expanding end is equipped with pressure sensor.

Preferred: the male cone (strobilus masculinus) and inner conical surface angle with horizontal plane are 13 °~28 °, preferably 15 °.

Preferred: the straight length and screw entire length ratio of the male cone (strobilus masculinus) are between 0.45~0.58.

Preferred: the screw length and expansion leaf length ratio are between 1~1.55.

The invention has the following advantages over the prior art:

On the basis of positioning to inner hole of workpiece, make the expansion piece of expanding end to mandrel radial direction by the length that screw is screwed into It is mobile, so that the hole tensioner of clamped part is achieved the purpose that positioning, fastening, entire clamping process is quick and passes through workpiece Internal hole positioning is accurate, improves the qualification rate of work pieces process；To the multiple and different processes of outer workpiece process when no replacement is required other Tooling saves the time；Entire core shaft structure is simple, design is reasonable, easy to operate, presss from both sides compared to the special design specialized of different parts Frock cost is reduced for tool；By the size design of screw, the damage of screw in long-term use process is reduced to greatest extent Consumption.

Detailed description of the invention

Fig. 1 is overall structure of the present invention；

Fig. 2 is mandrel schematic diagram of internal structure；

Fig. 3 is that mandrel expands end structure illustration；

Fig. 4 is mandrel A to structural schematic diagram；

Fig. 5 is bolt structure schematic diagram.

In figure: 1, mandrel；1-1, slot；1-2, expansion piece；2, screw；3, pressure sensor.

Specific embodiment

It is sufficiently illustrated now in conjunction with structure and principle of the specific embodiment to mandrel tool of the present invention, so that ability Domain those of ordinary skill can fully understand and implement.

As shown in fig. 1~fig. 5, a kind of expansion force central spindle tooling, including mandrel 1, screw 2；The expanding end of the mandrel 1 is by three A slot 1-1 along axial parallelly distribute on is separated into three expansion piece 1-2, and the bottom the slot 1-1 is circle (to eliminate stress mutation Influence to expansion piece 1-2 improves expansion piece 1-2 service life)；The internal screw thread being screwed into for screw 2 is equipped in the expanding end, And it is equipped with inner conical surface M in expanding end end face, the head of the screw 2 is equipped with the male cone (strobilus masculinus) N cooperated with inner conical surface M, so that screw 2 Move radially expansion piece 1-2 along mandrel 1；The inner conical surface M of the expanding end is equipped with pressure sensor 3.

It in specific works, is fixed by 1 left end of mandrel with lathe, right end is inserted into the inner hole of workpiece to be processed, passes through rotation Turning screw 2 makes screw 2 to moving along a straight line inside mandrel 1, in the process of movement 2 male cone (strobilus masculinus) N extrusion expansion end inner conical surface M of screw Radially move expansion piece 1-2 to the outer circle of mandrel 1, to make to reach quickly fixed in external workpieces processing tensioner Effect.By above-mentioned elaboration it is found that the tightness of workpiece is determined by the outside extruding force of expansion piece 1-2, that is, from screw 2 to The distance moved in mandrel 1 determines, although can judge tightness by moving distance in long-term work, not Intuitively, and after long-time service its fastening force will necessarily be deviated, therefore in the pressure sensor of the inner conical surface M of expanding end setting 3 have obvious action, and in the long-term use process, the different processes of different workpieces are fed back by pressure sensor 3 Specific value determine the degree of later clamping, i.e., stop mobile screw 2 after numerical value is shown to fastening numerical value, do not need according to Moving distance by screw 2 judges, clamping precision is improved, especially in the small parts hardness ag(e)ing fruit high to required precision Significantly, it is also avoided that when the internal grip force that rises is excessive to the finite wear in workpiece hole.Pressure sensor 3 is specifically configured to: Pressure-sensing device is set on inner conical surface M, for signal processing unit may be provided at close to mandrel 1 other end outer surface or It is separately provided.

By positioning to inner hole of workpiece, keep clamping workpiece rapid, accurate positioning and avoids multiple not to outer workpiece With the time for replacing tooling when process processing；Entire tool structure is simple, design is reasonable, easy to loading and unloading, compared to different parts Frock cost is reduced for special design specialized fixture.

In addition, the male cone (strobilus masculinus) N straight length and angle of screw 2, screw 2, expansion piece 1-2 length compare screw 2 twist Enter and accompanies significant impact with rising for expansion piece 1-2.Male cone (strobilus masculinus) N straight length and angle too small can make operation laborious, cross conference Cause expansion piece 1-2 rise press from both sides it is too fast, precision be difficult to control.By test of many times, when the straight length and screw 2 of the male cone (strobilus masculinus) Entire length ratio is between 0.45~0.58；2 length of screw and expansion piece 1-2 length ratio are between 1~1.55；It is described outer The conical surface and inner conical surface angle with horizontal plane β have good rise to press from both sides effect when being 15 °, and very to the abrasion of screw 2, expansion piece 1-2 Small, the specific length of each section should be depending on workpiece to be processed.

Above-described embodiment is only the preferred embodiment of the present invention, the limitation in any form not made to the present invention. Anyone skilled in the art, when not departing from the technology of the present invention principle and aspects, all using above Disclosed method makes many possible changes and modifications to technical solution of the present invention, or is revised as the equivalent reality of equivalent variations Apply example.Therefore, all without departing from the principle of the present invention or scheme, according to the technical essence of the invention to technology disclosed by the invention Any combination that feature is made, modifications or substitutions should belong to the protection scope of technical solution of the present invention.

Claims

1. a kind of expansion force central spindle tooling, which is characterized in that including mandrel (1), screw (2)；The mandrel (1) if expanding end by The dry slot (1-1) along axial parallelly distribute on is separated into several expansion pieces (1-2), and the slot bottom (1-1) is circle；It is described It is equipped with the internal screw thread being screwed into for screw (2) in expanding end, and is equipped with inner conical surface, the head of the screw (2) in expanding end end face Equipped with the male cone (strobilus masculinus) cooperated with inner conical surface, so that screw (2) moves radially expansion piece (1-2) along mandrel (1).

2. a kind of expansion force central spindle tooling as described in claim 1, which is characterized in that the slot (1-1) and expansion piece (1-2) Number is three.

3. a kind of expansion force central spindle tooling as described in claim 1, which is characterized in that the inner conical surface of the expanding end is equipped with pressure Sensor (3).

4. a kind of expansion force central spindle tooling as described in claim 1, which is characterized in that the male cone (strobilus masculinus) and inner conical surface and horizontal plane Angle is 13 °~28 °, preferably 15 °.

5. such as a kind of described in any item expansion force central spindle toolings of Claims 1-4, which is characterized in that the straight line of the male cone (strobilus masculinus) Length and screw (2) entire length ratio are between 0.45~0.58.

6. a kind of expansion force central spindle tooling as claimed in claim 5, which is characterized in that screw (2) length and expansion piece (1- 2) length ratio is between 1~1.55.