CN1354069A - Clamping chuck for clamping cutting-tool by means of hot-press fit - Google Patents
Clamping chuck for clamping cutting-tool by means of hot-press fit Download PDFInfo
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- CN1354069A CN1354069A CN 00128537 CN00128537A CN1354069A CN 1354069 A CN1354069 A CN 1354069A CN 00128537 CN00128537 CN 00128537 CN 00128537 A CN00128537 A CN 00128537A CN 1354069 A CN1354069 A CN 1354069A
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- tool
- holder
- stop element
- chuck
- installing hole
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Abstract
The present invention relates to a grip holder for holding cutting tool by means of hot-press, fitting. It possesses a grip holder body fixed on the main shaft of machine-tool, and in the interior of the grip holder body a central mounting hole for holding cutting tool is formed. It is characterized by that the grid holder body contains a tool holder forming mounting hole and an arresting element which at least partially envelops the tool holder and possesses a fitting face for the tool at its end face side, in which the tool holder and arresting element are mutually connected at the place being a certain distance from the fitting face, and they are formed from different materials with different expansion coefficients, so that when the temp. is changed, the tool holder can be more violently expanded than the arresting element.
Description
The present invention relates to a kind of chuck by the shrink fit clamp-on tool, have a collet body that can be fixed on the machine tool chief axis, do a center mounting hole that is used for cutter handle of a knife to be clamped above it.
This class chuck of known various different structure forms, they are used for handle of a knife, and for example bit sub or milling cutter shank are fixed on the main shaft of corresponding lathe.It is used for fixing little cutter especially.
Chuck commonly used by the shrink fit clamp-on tool is made up of a metal collet body usually, and it can be fixed on the main shaft of used lathe, and has a center mounting hole that is used for cutter handle of a knife to be clamped.Here the diameter of installing hole is determined in this wise, makes it slightly less than the handle of a knife diameter.For the clamp-on tool collet body heats in the installing hole zone at least, expand into until installing hole handle of a knife is packed into.Installing hole shrinks again handle of a knife is fixed in the installing hole by interference fit or shrink fit in the cooling procedure of following.
This so-called thermal contraction chuck is verified fully.But its shortcoming is, the position of cutter in installing hole can not pre-determine, because the relative position between cutter and the installing hole may change in collet body cooling procedure and associated contraction process.Particularly can not guarantee, cutter head, for example milling head or reamer head are fitted on the collet body end face by hope, so that supported when work.Cutter life, some fell short of for this reason.
Therefore the objective of the invention is, form the chuck of described this class of beginning in this wise, make to guarantee the termination contact of cutter on collet body.
Solve like this by this task of the present invention, making collet body comprise a tool-holder and that constitutes installing hole surrounds tool-holder and has the stop element of the binding face of a cutter at end face to small part, wherein tool-holder and stop element are interconnecting from the certain axial distance of binding face, and at least a portion is made up of the material with different heat expansion coefficient, makes that tool-holder expands more violently than stop element when causing the variations in temperature of installing hole expansion.
Therefore make many by collet body of the present invention, wherein tool-holder can expand more tempestuously and shrinks when variations in temperature than stop element.Adopting material commonly used, for example under the situation of metal when the expansion of collet body heating and the installing hole that causes thus tool-holder than stop element axial expansion more consumingly.Because stop element is being fixedlyed connected from binding face a distance with tool-holder, this bigger axial expansion causes, and tool-holder is extruded from stop element, and in when cooling conversely again axially in the retraction stop element.Reach by this pull in effect in when cooling, the cutter of packing installing hole into and being fixed on its inside pulls to the binding face of stop element.The accurate location of cutter in collet body consequently, and guarantee that by applying cutter head is supported when the work with stop element, its result can obviously improve the circular runout of cutter life and cutter.
If use common material, metal for example, in order to reach above-mentioned effect requirements, tool-holder regional area at least has the thermal coefficient of expansion bigger than the material of stop element.For example tool-holder can be mainly by aluminium, and stop element is made up of steel.Select to consider to adopt memory material as another kind.The material pairing is selected separately in this wise in this case, the pull in effect that makes appearance hope.
According to a kind of form of implementation of the present invention imagination, stop element forms a matrix that can be connected with main shaft, and tool-holder is from the stop element of packing into of end face one side with binding face then.Tool-holder for example can be screwed in the stop element with screw thread, so that set up needed connection.But also can consider welding or the like.Same stop element and tool-holder also can be made of one, and for example make with casting method.
Secondly in the structure of this form of implementation, can consider, tool-holder axially is divided into two sections, first element that constitutes installing hole is made up of a kind of its thermal coefficient of expansion and the substantially the same material of stop element material thermal expansion coefficient, and second element that is attached thereto has the thermal coefficient of expansion bigger than stop element.This many structures of tool-holder have such advantage; Tool-holder presents identical hot expansibility with stop element in the installing hole zone, can determine size more accurately.
It is contemplated that also that by another kind of form of implementation of the present invention tool-holder forms a matrix that can be connected with main shaft, stop element is enclosed within on the tool-holder from installing hole one side then, and with it for example by welding or being threaded togather.
Stuck for fear of between strong material that expands of tool-holder and the stop element, between stop element and tool-holder at least regional area the expansion clearance is set may be suitable, the tool-holder material can be displaced in this gap when the installing hole thermal expansion.Select also can be provided with a suitable compensation material as another kind.This is particularly beneficial when tool-holder and stop element are made of one structure.
By a kind of preferred form of implementation imagination, tool-holder and stop element locate and select size mutually in this wise, and the installing hole end face is withdrawn into after the stop element binding face under clamped condition, and stretch out binding face under the tool changing state of installing hole expansion at last.Tool-holder exceeds binding face and stretches out from stop element under the tool changing state of heat, reach by this method, and the cutter of packing at first radially clamps, then just withdrawal.Reach best circular runout characteristic thus.
Consult dependent claims and with reference to the following explanation of accompanying drawing about other good structures of the present invention to embodiment.Expression in the drawings:
Fig. 1 looks by the vertical profile of a kind of form of implementation of chuck of the present invention,
Chuck is in heated condition among Fig. 2 Fig. 1,
Chuck among Fig. 3 Fig. 1 and 2 is together with a cutter that clamps,
A kind of flexible program of chuck shown in Fig. 4 Fig. 1 to 3 look together with the vertical profile of the cutter that clamps and
Fig. 5 looks together with the vertical profile of the cutter that clamps by the another kind of form of implementation of chuck of the present invention.
Fig. 1 to 3 looks expression by first kind of form of implementation passing through the chuck of shrink fit clamp-on tool of the present invention with vertical profile.Chuck comprises a collet body 1 of being made up of a kind of firm material, it has a center mounting hole 2 in an one stub area, the cutter W for example cylindrical knife shank of drill bit or milling cutter can pack in this installing hole, in its another stub area can be clamped in the main shaft that the rotation of lathe drives with known method.
Shown in chuck 1 make two, and form by a matrix 3 that can be fixed in the main shaft, matrix forms a binding face 4 that is used for cutter W on the end face of its knife end, therefore be referred to as stop element below.Be provided with a tool-holder 6 in the center mounting hole 5 of stop element 3, it forms cutter installing hole 2, and in the end retraction stop element 3 with binding face 4.Tool-holder 6 has the little axle 7 of a screw thread in the end of its lathe one side, it can be screwed in the internal thread 9 of stop element 3, so that tool-holder is fixed in the stop element 3.
Have the material bigger and form by a kind of by tool-holder 6 of the present invention than the material thermal expansion coefficient of stop element.Specifically tool-holder 6 is made up of aluminium, and stop element 3 is made up of steel.The material that has different heat expansion coefficient by application reaches, and tool-holder 6 expands more tempestuously than stop element 3 when heated chuck body 1, makes the end of tool-holder 6 cutters one side extrude from stop element, as seen in Figure 2.If now cutter W packs in the installing hole 2, and makes collet body 1 cooling, tool-holder 6 shrinks quickly again than stop element 3 so, and wherein handle of a knife is at first radially clamped by tool-holder 6, pulls to the binding face 4 (Fig. 3) of stop element 3 then.Guarantee that by the effect of pulling back cutter head is fitted on the collet body 1 fully, improve the rigidity of collet body/cutter structure thus, reduce the possibility of vibration, thereby obviously improve service life.
Do not draw, between tool-holder 6 and stop element 3, be provided with an annular gap, form a space, the tool-holder 6 violent materials that expand can be displaced in this space with this.
Expression one is basically corresponding to the chuck of the chuck of Fig. 1 to 3 among Fig. 4, unique difference is, here tool-holder 6 axially is divided into first an element 6a and who forms cutter W installing hole 2 and is connected the second element 6b above it in lathe one side, and it is threaded with stop element 3.Two element 6a, 6b is mutually permanently connected.The first element 6a and stop element 3 are just the same to be made up of steel, and second element is by the material with big thermal coefficient of expansion, and just aluminium is formed.When collet body 1 heating so that with pack into installing hole 2 or when therefrom taking out of cutter, the first element 6a of stop element 3 and tool-holder extends with same size, and extend more violently, thereby the first element 6a is extruded from the installing hole 5 of stop element 3 by second element that aluminium is formed.In order to compensate owing to being radially expanded more greatly that stronger thermal expansion occurs, between the wall of installing hole 5 and the second element 6b, be provided with expansion clearance 8, the material of the second element 6b can be displaced in this gap when thermal expansion, therefore can not occur stuck.
Many forms of implementation of selected here tool-holder 6 have such advantage, make tool-holder identical with stop element 3 characteristics in the installing hole zone, therefore only need little gap, consequently can reach high circular runout characteristic.
Expression is by the third form of implementation of chuck of the present invention among Fig. 5.Here collet body 1 is also made two, and comprise a matrix that can be fixed on the machine tool chief axis, it is formed for the installing hole 2 of cutter W, therefore be also referred to as tool-holder 6 below, next belongs to the stop element 3 that also has of collet body 1, it is enclosed within the zone of installing hole 2 on the tool-holder 6, welds together at the end and the tool-holder 6 of its lathe one side.
In this form of implementation, form by a kind of material with thermal coefficient of expansion bigger than the material of stop element 3 with the same tool-holder 6 when first kind of form of implementation.Therefore when collet body 1 heating so that cutter W packs into installing hole 2 or during from the taking-up of its inside, tool-holder 6 expands than stop element 3 more tempestuously in the zone of installing hole 2, tool-holder 6 is stretched out at the end face of the cutter one side binding face 4 with respect to stop element 3.When cutter is packed back collet body 1 into when cooling off again, clamp-on tool W at first radially, the fact of shrinking more tempestuously than stop element 3 according to tool-holder 6 is withdrawn towards stop surface 4 then.
The same with the front by means of the described first kind of form of implementation of Fig. 1 to 3, between tool-holder 6 and stop element 3, leave an annular gap 8, so that compensation tool-holder 6 more violent being radially expanded when heating, thereby and avoid stuck.
Claims (14)
1. pass through the chuck of shrink fit clamp-on tool, has a collet body (1) that can be fixed on the machine tool chief axis, formation one is used for the center mounting hole (2) of cutter to be clamped (W) handle of a knife in the collet body, it is characterized in that: collet body (1) comprises one and constitutes the tool-holder (6) and of installing hole (2) to small part encirclement tool-holder (6), and has a stop element (3) of the binding face (4) that is used for cutter (W) in the end face side, wherein tool-holder (6) and stop element (3) are interconnecting from (4) one sections axial distance of binding face, and form in this wise by the material with different heat expansion coefficient to small part, make that tool-holder (6) expands more tempestuously than stop element (3) when causing the variations in temperature of installing hole (2) expansion.
2. by the chuck of claim 1, it is characterized in that: the material of tool-holder (6) has the big thermal coefficient of expansion of material than stop element (3) at least in the part.
3. by the chuck of claim 2, it is characterized in that: tool-holder (6) and stop element (3) are made up of metal.
4. by the chuck of claim 3, it is characterized in that: tool-holder (6) mainly is made up of aluminium, and stop element (3) mainly is made up of steel.
5. by each chuck of aforesaid right requirement, it is characterized in that: stop element (3) constitutes a matrix that can be connected with main shaft.
6. by the chuck of claim 5, it is characterized in that: tool-holder (6) is from the stop element (3) of packing into of end face one side with binding face (4).
7. by the chuck of claim 6, it is characterized in that: tool-holder (6) is screwed in the stop element (3) with screw thread.
8. by each chuck of claim 5 to 7, it is characterized in that: tool-holder (6) axially separately, and comprising second element (6b) that first element (6a) and that a material by having identical with the material of stop element (3) basically thermal coefficient of expansion that constitutes installing hole (2) forms is attached thereto, its thermal coefficient of expansion is greater than stop element (3).
9. by the chuck of claim 8, it is characterized in that: first element (6a) of stop element (3) and tool-holder (6) is made up of steel, and second element (6b) of tool-holder (6) is made up of aluminium.
10. by each chuck of claim 1 to 4, it is characterized in that: tool-holder (6) constitutes a matrix that can be connected with main shaft.
11. by the chuck of claim 10, it is characterized in that: stop element (3) puts tool-holder (6) from installing hole one side.
12. by the chuck of claim 10 or 11, it is characterized in that: stop element (3) welds with tool-holder (6) or is threaded.
13. each cutter holder by the aforesaid right requirement, it is characterized in that: the part is provided with expansion clearance (8) at least between stop element (3) and tool-holder (6), and the material that expands more tempestuously of tool-holder (6) can be displaced in this gap when installing hole (2) expansion relevant with temperature.
14. each chuck by the aforesaid right requirement, it is characterized in that: tool-holder (6) and stop element (3) are located and definite size in this wise mutually, the end face of installing hole (2) is contracted under clamped condition at the binding face (4) of stop element (3) afterwards, and stretch out binding face (4) at the tool changing state of installing hole expansion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00128537 CN1354069A (en) | 2000-11-17 | 2000-11-17 | Clamping chuck for clamping cutting-tool by means of hot-press fit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00128537 CN1354069A (en) | 2000-11-17 | 2000-11-17 | Clamping chuck for clamping cutting-tool by means of hot-press fit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1354069A true CN1354069A (en) | 2002-06-19 |
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ID=4593151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00128537 Pending CN1354069A (en) | 2000-11-17 | 2000-11-17 | Clamping chuck for clamping cutting-tool by means of hot-press fit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1354069A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448577C (en) * | 2003-11-05 | 2009-01-07 | 雄克有限公司 | Expanding clamping device |
| CN1929941B (en) * | 2004-01-16 | 2010-10-06 | 弗朗茨·海默机械制造两合公司 | Vibration-damped tool holder |
| CN101815595B (en) * | 2007-10-03 | 2012-04-04 | 钴碳化钨硬质合金公司 | Shrink fit sleeve for tool holder |
| CN104625130A (en) * | 2014-12-19 | 2015-05-20 | 苏州路路顺机电设备有限公司 | Quickly mounted tool chuck |
| CN112404607A (en) * | 2019-08-20 | 2021-02-26 | 哈尔滨东安利峰刀具有限公司 | Thermal shrinkage type taper shank alloy gear shaper cutter |
-
2000
- 2000-11-17 CN CN 00128537 patent/CN1354069A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448577C (en) * | 2003-11-05 | 2009-01-07 | 雄克有限公司 | Expanding clamping device |
| CN1929941B (en) * | 2004-01-16 | 2010-10-06 | 弗朗茨·海默机械制造两合公司 | Vibration-damped tool holder |
| CN101815595B (en) * | 2007-10-03 | 2012-04-04 | 钴碳化钨硬质合金公司 | Shrink fit sleeve for tool holder |
| CN104625130A (en) * | 2014-12-19 | 2015-05-20 | 苏州路路顺机电设备有限公司 | Quickly mounted tool chuck |
| CN112404607A (en) * | 2019-08-20 | 2021-02-26 | 哈尔滨东安利峰刀具有限公司 | Thermal shrinkage type taper shank alloy gear shaper cutter |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |