CN108942068A - Compensation keeps clamping device in the self-centering hole of tension automatically when heat parts - Google Patents
Compensation keeps clamping device in the self-centering hole of tension automatically when heat parts Download PDFInfo
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- CN108942068A CN108942068A CN201810531752.9A CN201810531752A CN108942068A CN 108942068 A CN108942068 A CN 108942068A CN 201810531752 A CN201810531752 A CN 201810531752A CN 108942068 A CN108942068 A CN 108942068A
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- China
- Prior art keywords
- pawl
- swelling
- clamping device
- self
- centration axis
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Clamps And Clips (AREA)
Abstract
The present invention relates to compensation keeps clamping device in the self-centering hole of tension automatically when a kind of heat parts, including centration axis, centration axis is equipped with the flange for installing swelling pawl, at least three hinged seats are uniformly distributed in the axial end of flange, swelling pawl has been respectively articulated on each hinged seat, the fixing end and hinged seat of swelling pawl pass through bolted splice, extend hinged seat in the free end of swelling pawl, tight sleeve is cased on the shaft part of centration axis, the front end of tight sleeve is equipped with the push-plate for pushing the free end motion of swelling pawl, push-plate is equipped with guide surface, preloading spring is arranged in tight sleeve rear end, preloading spring covers on the shaft part of centration axis, it is compressed by the clamp nut being threadedly engaged with centration axis, make the push-plate of tight sleeve that swelling pawl free end be pushed to do strained movements, it is fixed for being tensioned part from inner bore of part.Clamping device can clamp in which carry out automatic radial compensation with the varying aperture of heat parts in the hole, and the clamping of part is stablized, it has Self-centering Action, part accurate positioning.
Description
Technical field
The present invention relates to compensation keeps the self-centering of tension automatically when a kind of a kind of clamping device, in particular to heat parts
Clamping device in hole.
Background technique
Currently, it is a kind of more typical technique that part, which carries out heat treatment because of particular/special requirement, wherein just including hot spray-welding
Heat parts in technique.Hot spray-welding is a kind of technique using certain heat source in piece surface surfacing hard alloy layer,
It needs to heat part and coating in spray process, generally can just make hard alloy in 900 DEG C of even higher temperature
Layer realizes remelting with part base solid.The temperature of heat parts is higher, can make part that the variation in size and shape occur, thus easily
Cause the clamping device of part to lose clamping action, the displacement of part axial or the jumping phenomena of radial direction occurs, or even occur zero
Part and clamping device fall off.Clamping device in ball, pipe part hole is particularly acute, the aperture meeting after heat parts
It changes, and the device currently used for being clamped in the hole of part, do not have and carries out automatic radial direction with the variation in part aperture
Compensation keep tension function, often occur part clamping relax or it is stuck, cause the surfacing effect of part poor, matter
Measure it is unqualified, once it is stuck it also occur that the case where clamping device and product damage simultaneously.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide compensation keeps tension automatically when a kind of heat parts
Clamping device in self-centering hole, clamping device can carry out automatic radial compensation clamping with the varying aperture of heat parts in the hole,
Not only clamping is stablized, and is prevented the axial displacement and circular runout of part, can also be remained the tension of part during heating,
Guarantee the processing quality of part.And clamping device also has Self-centering Action, the accurate positioning of part in this hole.
The technical scheme is that compensation keeps clamping dress in the self-centering hole of tension automatically when a kind of heat parts
It sets, it is characterised in that: including centration axis, the centration axis is equipped with one for installing the flange of swelling pawl, the axis of the flange
At least three hinged seats are uniformly distributed around axle center on end face, have been respectively articulated with swelling pawl on each hinged seat, the swelling pawl is consolidated
By bolted splice, the free end of the swelling pawl is extended hinged seat, is covered on the shaft part of the centration axis for fixed end and hinged seat
There is tight sleeve, the front end of the tight sleeve is equipped with the push-plate for pushing the free end motion of swelling pawl, and the push-plate is equipped with and leads
To face, preloading spring is arranged in the rear end of the tight sleeve, and the preloading spring covers on the shaft part of centration axis, by with centration axis
The clamp nut being threadedly engaged compresses, and the push-plate of tight sleeve front end is made to push the free end motion of swelling pawl in self-centering tensioning shape
State is fixed for being tensioned part from inner bore of part.
The flange for installing swelling pawl is arranged in the middle section of centration axis, all around axis on the two axial ends face of the flange
The heart is uniformly distributed at least three hinged seats, and swelling pawl has been respectively articulated on each hinged seat, and the both ends of the centration axis shaft part cover
There is tight sleeve, the front end of two tight sleeves is equipped with the push-plate for pushing the free end motion of swelling pawl, and the rear end of two tight sleeves is equal
Preloading spring is set, and each preloading spring is respectively fitted on the shaft part of centration axis, the compression spiral shell by being threadedly engaged with centration axis
Mother compresses, and the push-plate of two tight sleeve front ends is made to push the free end motion of swelling pawl of flange two axial ends in self-centering tensioning shape respectively
State is fixed for being tensioned part from inner bore of part.
One end end of centration axis is arranged in the flange for installing swelling pawl, and the flange corresponds to shaft side
At least three hinged seats are uniformly distributed around axle center in axial end, have been respectively articulated with swelling pawl on each hinged seat.
The end of swelling pawl free end is circular shape.
The axially extending bore of the tight sleeve is set as stepped hole, and the bigger diameter end of the stepped hole is located at tight sleeve rear end, described
Preloading spring, which is mounted in the bigger diameter end of the stepped hole, and part is overhanging enables clamp nut to press preloading spring.
The guide surface of the push-plate is arc surface.
The guide surface of the push-plate is inclined-plane.
The circumference of the flange is equipped with multiple lifting grooves.
The hinged seat includes symmetrically arranged two brackets, and swelling pawl is arranged between two brackets.
The circumference of the flange is equipped with multiple resigning breach, and the position of each resigning breach is corresponding with hinged seat respectively.
By adopting the above technical scheme: including centration axis, the centration axis is equipped with one for installing the flange of swelling pawl, institute
It states and is uniformly distributed at least three hinged seats around axle center in the axial end of flange, be respectively articulated with swelling pawl on each hinged seat, it is described
For the fixing end and hinged seat of swelling pawl by bolted splice, hinged seat, the centration axis are extended in the free end of the swelling pawl
Shaft part on be cased with tight sleeve, the front end of the tight sleeve is equipped with the push-plate for pushing the free end motion of swelling pawl, described to push away
Disk is equipped with guide surface, and preloading spring is arranged in the rear end of the tight sleeve, and the preloading spring covers on the shaft part of centration axis, leads to
It crosses the clamp nut being threadedly engaged with centration axis to compress, making the push-plate of tight sleeve front end push the free end motion of swelling pawl is in make by oneself
Heart tensioning state is fixed for being tensioned part from inner bore of part.Gasket is equipped between clamp nut and preloading spring, because compressing
Nut is to compress preloading spring by the axial displacement of rotation generation, and the gasket between clamp nut and preloading spring can solve
Except rotating in a circumferential direction for clamp nut, axial displacement is only transmitted to preloading spring, it is therefore prevented that preloading spring generates the case where torque, makes
The power of preloading spring compression storage is more stable.In use, first making part in the inner hole of the flange merging part in centration axis
Position is opposite with the position of swelling pawl, then tightens the clamp nut in centration axis, and tight sleeve is made to slide axially in centration axis top
Firmly swelling pawl, at this moment the free end of each swelling pawl is flared out the hole inner wall of swelling part, finally regulates preloading spring
Pretightning force can realize the stable holding of part.When tight sleeve holds out against swelling pawl force, each swelling pawl radian is consistently outside
It opens, after circle diameter that swelling pawl free end is opened is corresponding with inner bore of part diameter, swelling pawl stops starting pair
The hole inner wall of part carries out force swelling.During being processed after part clamps, swelling pawl is to hole in piece part inner wall
Tension force can be stablized by the adjusting of preloading spring, when the diameter of bore of part increases with the heating of part, pre-tighten bullet
Spring can discharge a part of pretightning force, so that tight sleeve is axially moveable to continue to compensate swelling pawl and is held out against, therefore this hole inner clip
Holding device can clamp in which carry out automatic radial compensation with the varying aperture of heat parts, stablize effectively to the clamping moment of part,
Remain the tension of part during heating, it is therefore prevented that the axial displacement of part, circular runout and hair phenomena such as fall off
It is raw, it ensure that the processing quality of part.When the diameter of bore of part reduces with the heating of part, the hole inner wall of part can be squeezed
Swelling pawl is pressed, swelling pawl free end at this moment circumferentially can reduce shape contraction to tight sleeve force by diameter, make tight sleeve along axial
It is mobile to compress preloading spring, by the pretightning force of preloading spring storage a part, both prevented this clamping device stuck in hole, this
Clamping device is damaged because hole in piece part inner wall squeezes, and the shadow in appearance and quality will not be caused to part
It rings.And clamping device also facilitates in the taking-up that part is completed after processing in this hole, directly unscrews in centration axis clamp nut i.e.
Can, the pretightning force for unscrewing rear preloading spring all discharges, and swelling pawl loses the effect to hole in piece part inner wall, can be easily from part
Hole inner wall takes out clamping device in this hole, and the operation of taking-up is also simple.Multiple swelling pawls also act self-centering effect simultaneously,
It can guarantee the concentricity of clamping device in part and this hole, the accurate positioning of part the moment.
The flange for installing swelling pawl is arranged in the middle section of centration axis, all around axis on the two axial ends face of the flange
The heart is uniformly distributed at least three hinged seats, and swelling pawl has been respectively articulated on each hinged seat, and the both ends of the centration axis shaft part cover
There is tight sleeve, the front end of two tight sleeves is equipped with the push-plate for pushing the free end motion of swelling pawl, and the rear end of two tight sleeves is equal
Preloading spring is set, and each preloading spring is respectively fitted on the shaft part of centration axis, the compression spiral shell by being threadedly engaged with centration axis
Mother compresses, and makes the push-plate of two tight sleeve front ends push the free end motion of swelling pawl of flange two axial ends in tensioning state respectively, uses
It is fixed in being tensioned part from inner bore of part.By flange be arranged in clamping device in the hole in centration axis middle section be mainly used for it is shorter by zero
The clamping of part, when tensioning clamps, the swelling pawl free end of flange two axial ends forms two circumference corresponding with hole in piece part, right
Part plays tensioning fixation.The tension force that the swelling pawl of flange two axial ends applies hole in piece part inner wall can be by pre-tightening bullet
The adjusting of spring is stablized, and guarantees the tune that swelling pawl is opened or shunk with the variation of part diameter of bore during heating
Section.The swelling pawl of two axial ends not only makes the clamping of part more stable, is more favorable to the positioning of part, both carries out to part
Radial positioning, the also accurate axial line of hole in piece part and the concentricity of centration axis axis, improves the processing quality of part.
Or one end end of centration axis is arranged in the flange for installing swelling pawl, the flange corresponds to shaft one
At least three hinged seats are uniformly distributed around axle center in the axial end of side, have been respectively articulated with swelling pawl on each hinged seat.Flange is set
It sets the clamping device in the hole of centration axis one end end and is mainly used for the clamping compared with elongated workpieces, when tensioning clamps, the both ends of part
It is respectively provided with a clamping device, then the clamp nut of both ends clamping device is adjusted respectively, makes the swollen of both ends clamping device
Tight pawl is in tensioning state holding parts.By flange be arranged in clamping device in the hole of centration axis one end end can be used for compared with
The clamping of short part, tensioning clamping when, be also provided with two clamping devices, one is protruded into from one end of inner bore of part, another from
It is protruded on the other end of inner bore of part, operation of the operation of tensioning clamping with clamping compared with elongated workpieces is consistent, and is only compared
When clamping is compared with elongated workpieces, the flange of two clamping devices is separated by a distance shorter, it might even be possible to against closing up.Therefore it is clamped in this hole
Device can both have been clamped compared with elongated workpieces, can also clamp shorter part, and use scope is wide.
The end of swelling pawl free end is circular shape.Circular shape not only have swelling pawl is flared out or to
The guiding function of contract also makes swelling pawl and the contact of hole in piece part inner wall good, it is therefore prevented that the local pressure of part more has
Tensioning conducive to swelling pawl to inner bore of part.
The axially extending bore of the tight sleeve is set as stepped hole, and the bigger diameter end of the stepped hole is located at tight sleeve rear end, described
Preloading spring, which is mounted in the bigger diameter end of the stepped hole, and part is overhanging enables clamp nut to press preloading spring.Stepped hole
Bigger diameter end not only to the compression of preloading spring have the function of guiding, can also shorten clamping device in this hole to a certain extent
Length, both saved material, also facilitated the clipping operation of this clamping device.
The guide surface of the push-plate is that the guide surface of arc surface or the push-plate is inclined-plane.Arc surface or inclined-plane are not only
It with guiding role, while also helping tight sleeve and the force of swelling pawl is compressed, the stress condition of swelling pawl is also more preferable.
The circumference of the flange is equipped with multiple lifting grooves.The lifting groove facilitates the hoisting hook of relatively large part
Dress, the iron chains of lifting lifting groove when passing through inner bore of part form the resigning to iron chains.
The hinged seat includes symmetrically arranged two brackets, and swelling pawl is arranged between two brackets.Two stands it is hinged
Seat makes the hinged of swelling pawl and movement more stable.
The circumference of the flange is equipped with multiple resigning breach, and the position of each resigning breach is corresponding with hinged seat respectively.It is swollen
When tight pawl is stuck in inner bore of part, ejection in inner bore of part can be protruded into a tool or hooks the tight pawl of auxetic to release swelling pawl
Clamping, the resigning breach in flange circumference forms tool and protrudes into inner bore of part to the ejection of swelling pawl or hook the resigning drawn,
Facilitate releasing when swelling pawl is stuck in inner bore of part.
Compensation keeps clamping device in the self-centering hole of tension that can become with the aperture of heat parts automatically when this heat parts
Change and clamp with carrying out automatic radial compensation, not only clamping is stablized, and is prevented the axial displacement and circular runout of part, can also be protected always
The tension of part during heating is held, guarantees the processing quality of part.And clamping device also has self-centering work in this hole
With the accurate positioning of part.
The invention will be further described with specific embodiment with reference to the accompanying drawings of the specification.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of centration axis of the present invention；
Fig. 3 is the A-A cross-sectional view of Fig. 2；
Fig. 4 is the structural schematic diagram of tight sleeve of the present invention；
Fig. 5 is the structural schematic diagram of swelling pawl of the present invention；
Fig. 6 is the B-B cross-sectional view of Fig. 5；
Fig. 7 is the structural schematic diagram of bolt of the present invention；
Fig. 8 is the structural schematic diagram of preloading spring of the present invention；
Fig. 9 is another embodiment of the invention.
In attached drawing, 1 is centration axis, and 2 be clamp nut, and 3 be gasket, and 4 be preloading spring, and 5 be swelling pawl, and 5-1 is freely
End, 5-2 are fixing end, and 6 be hinged seat, and 6-1 is bracket, and 7 be flange, and 7-1 is lifting groove, and 7-2 is resigning breach, and 8 be spiral shell
Bolt, 9 be tight sleeve, and 9-1 is stepped hole, and 9-2 is guide surface, and 9-3 is push-plate.
Specific embodiment
Referring to Fig. 1 to Fig. 9, compensation keeps clamping device in the self-centering hole of tension automatically when a kind of heat parts, including
Centration axis 1, the centration axis 1 are equipped with one for installing the flange 7 of swelling pawl 5, and it is recessed that the circumference of the flange 7 is equipped with lifting
Slot 7-1.Lifting groove 7-1 facilitates the hoisting and hanging of relatively large part, and the iron chains of lifting lifts recessed when passing through inner bore of part
Slot 7-1 forms the resigning to iron chains.At least three hinged seats 6 are uniformly distributed around axle center in the axial end of the flange 7, it is each to cut with scissors
Swelling pawl 5 has been respectively articulated on joint chair 6.The hinged seat 6 includes symmetrically arranged two bracket 6-1, and swelling pawl 5 is arranged two
Between a bracket 6-1.The fixing end 5-2 and hinged seat 6 of the swelling pawl 5 are hinged by bolt 8, two brackets of hinged seat 6
It is machined with through-hole on 6-1 and swelling pawl 5, each correspondence of bolt 8 has cooperated across bracket 6-1 and the through-hole of swelling pawl 5 with nut
At hinged fixation.The axis of each bolt 8 is vertical with 1 axial line of centration axis and standoff distance is all the same, each swelling pawl 5
Processing dimension is consistent, and the shape of each 6 bracket 6-1 of hinged seat is all the same and is evenly distributed on flange 7 around axle center.The swelling pawl
5 free end 5-1 extends hinged seat 6, and the end of 5 free end 5-1 of swelling pawl is circular shape.Circular shape not only has
Swelling pawl 5 is flared out or to contract guiding function, also make swelling pawl 5 and the contact of hole in piece part inner wall good, prevent
The local pressure for having stopped part is more advantageous to tensioning of the swelling pawl 5 to inner bore of part.Top is cased on the shaft part of the centration axis 1
Fixed 9, the front end of the tight sleeve 9 is equipped with push-plate 9-3, the push-plate 9-3 for pushing 5 free end 5-1 of swelling pawl to move
It is equipped with guide surface 9-2.The guide surface 9-2 of the push-plate 9-3 is that the guide surface 9-2 of arc surface or the push-plate 9-3 are oblique
Face.Arc surface or inclined-plane not only have guiding role, while also helping tight sleeve 9 and compressing to the force of swelling pawl 5, swelling pawl
5 stress condition is also more preferable.The guide surface 9-2 of the present embodiment selection circular arc.Preloading spring 4 is arranged in the rear end of the tight sleeve 9,
4 sets of the preloading spring is compressed by the clamp nut 2 being threadedly engaged with centration axis 1 on the shaft part of centration axis 1, makes to hold out against
The push-plate 9-3 for covering 9 front ends pushes 5 free end 5-1 of swelling pawl movement in self-centering tensioning state, for from inner bore of part by part
Tensioning is fixed.The axially extending bore of the tight sleeve 9 is set as stepped hole 9-1, and the bigger diameter end of stepped hole 9-1 is located at tight sleeve 9
Rear end, the preloading spring 4, which is mounted in the bigger diameter end of stepped hole 9-1, and part is overhanging enables clamp nut 2 to preload
Spring 4 presses.The bigger diameter end of stepped hole 9-1 not only has the function of guiding to the compression of preloading spring 4, can also be to a certain degree
The upper length for shortening clamping device in this hole, has both saved material, has also facilitated the clipping operation of this clamping device.The compression
Gasket 3 is equipped between nut 2 and preloading spring 4, clamp nut 2 is to compress preloading spring by the axial displacement of rotation generation
4, the gasket 3 between clamp nut 2 and preloading spring 4 can release rotating in a circumferential direction for clamp nut 2, only transmit axial displacement and give
Preloading spring 4, it is therefore prevented that preloading spring 4 generates the case where torque, keeps the power of the compression storage of preloading spring 4 more stable.It is described convex
The circumference of edge 1 is equipped with multiple resigning breach 7-2, and the position of each resigning breach 7-2 is corresponding with hinged seat 6 respectively.Swelling pawl 5 blocks
When in inner bore of part, ejection in inner bore of part can be protruded into a tool or hooks the tight pawl 5 of auxetic to release the card of swelling pawl 5
Tightly, the tool that ejection or hook are drawn can be iron wire, and the resigning breach 7-2 in flange circumference forms iron wire and protrudes into inner bore of part
To 5 ejection of swelling pawl or the resigning drawn is hooked, facilitates releasing when swelling pawl 5 is stuck in inner bore of part.
The flange 7 for installing swelling pawl 5 is arranged in the middle section of centration axis 1, on the two axial ends face of the flange 7 all
At least three hinged seats 6 are uniformly distributed around axle center, swelling pawl 5 has been respectively articulated on each hinged seat 6,1 shaft part of centration axis
Both ends are cased with tight sleeve 9, and the front end of two tight sleeves 9 is equipped with the push-plate 9-3 for pushing 5 free end 5-1 of swelling pawl to move,
The rear end of two tight sleeves 9 is respectively provided with preloading spring 4, and each preloading spring 4 is respectively fitted on the shaft part of centration axis 1, by with it is fixed
The clamp nut 2 that mandrel 1 is threadedly engaged compresses, and the push-plate 9-3 of two tight sleeves, 9 front end is made to push the swollen of 7 two axial ends of flange respectively
Tight 5 free end 5-1 of pawl movement is in self-centering tensioning state, is fixed for being tensioned part from inner bore of part.7 two axial ends of flange
Swelling pawl 5 can stablize the tension force that hole in piece part inner wall applies by the adjusting of preloading spring 4, and guarantee swelling pawl 5 with
The adjusting that the variation of part diameter of bore during heating is opened or shunk.The swelling pawl 5 of two axial ends not only makes zero
The clamping of part is more stable, is more favorable to the positioning of part, both carries out radial positioning to part, also accurate hole in piece part
The concentricity of axial line and 1 axis of centration axis, improves the processing quality of part.In use, first by clamping device in this hole from
The side of inner bore of part is placed in, and it is opposite with the position of swelling pawl 5 in 1 middle section of centration axis to make the position of part, then tighten centration axis 1
On two clamp nuts 2, so that the tight sleeve 9 at 1 both ends of centration axis is slid axially in centration axis 1 to centre and withstand swelling pawl
5, at this moment the free end 5-1 of each swelling pawl 5 is flared out the hole inner wall of swelling part, finally regulates the pre- of preloading spring 4
Clamp force can realize the stable holding of part.After processing, two clamp nuts 2 unscrewed in centration axis 1 take out clamping device
?.Or one end end of centration axis 1, the corresponding shaft of the flange 7 is arranged in the flange 7 for installing swelling pawl 5
At least three hinged seats 6 are uniformly distributed around axle center in the axial end of side, have been respectively articulated with swelling pawl 5 on each hinged seat 6.It will be convex
Edge 7 is arranged in clamping device in the hole of 1 one end end of centration axis and is mainly used for the clamping compared with elongated workpieces, when tensioning clamps, part
It is the clamping completed by two clamping devices, two clamping devices are located at the both ends of part, and both ends clamping device is convex
Swelling pawl 5 on edge 7 is respectively positioned in the inner hole of part, is adjusted the clamp nut 2 tightened in each device centration axis 1, is made each device
Tight sleeve 9 slide axially in centration axis 1 to 7 direction of flange and withstand swelling pawl 5, keep the free end 5-1 of each swelling pawl 5 equal
It is flared out the hole inner wall of swelling part, realizes the stable holding of part.Flange 7 is arranged in the hole of 1 one end end of centration axis
Interior clamping device can be used for the clamping of shorter part, and the operation of tensioning clamping is consistent compared with the operation of elongated workpieces with clamping
, when only compared to clamping compared with elongated workpieces, the flange 7 of two clamping devices is separated by a distance shorter, it might even be possible to against closing up.Cause
Clamping device can both have been clamped compared with elongated workpieces in this this hole, can also clamp shorter part, and use scope is wide.The present embodiment selection will be used
In the flange 7 of installation swelling pawl 5, the middle section of centration axis 1 is set.
When tight sleeve 4 holds out against the force of swelling pawl 5, guiding arc of each swelling pawl 5 by the guide surface 9-2 of push-plate 9-3
Degree is consistently flared out, after the circle diameter of 5 free end 5-1 of swelling pawl opening is corresponding with inner bore of part diameter, swelling
The stopping of pawl 5 starts to carry out force swelling to the hole inner wall of part.During being processed after part clamps, swelling
Pawl 5 can stablize the tension force of hole in piece part inner wall by the adjusting of preloading spring 4, when diameter of bore the adding with part of part
Heat and when increasing, preloading spring 4 can discharge a part of pretightning force, be axially moveable tight sleeve 9 and continue to mend swelling pawl 5
It repays and holds out against, therefore clamping device can clamp in which carry out automatic radial compensation with the varying aperture of heat parts in this hole, to part
The clamping moment stablize effectively, remain the tension of part during heating, it is therefore prevented that the axial displacement of part radial is jumped
The generation for phenomena such as moving and falling off, ensure that the processing quality of part.When the diameter of bore of part reduces with the heating of part
When, the hole inner wall of part can squeeze swelling pawl 5, and 5 free end 5-1 of swelling pawl at this moment circumferentially can reduce shape contraction to top by diameter
Fixed 9 force, is axially moveable tight sleeve 9 and compresses preloading spring 4, the pretightning force of a part is stored by preloading spring 4, was both prevented
Stopping this clamping device stuck in hole in piece part, this clamping device is damaged because hole in piece part inner wall squeezes,
The influence in appearance and quality will not be caused to part, provide guarantee for the completion of part subsequent handling.It is multiple swollen simultaneously
Tight pawl 5 also acts self-centering effect, can guarantee the concentricity of clamping device in part and this hole the moment, and the positioning of part is quasi-
Really.It is clamped in hole in piece part when the present apparatus needs to heat especially suitable for ball, pipe part surface treatment procedure, as surface is hard
Matter alloy powder flame spray welding, the spraying of supersonic speed cemented carbide powder, high-frequency quenching processing etc..
Claims (10)
1. compensation keeps clamping device in the self-centering hole of tension automatically when a kind of heat parts, it is characterised in that: including centering
Axis (1), the centration axis (1) are equipped with one for installing the flanges (7) of swelling pawl (5), in the axial end of the flange (7) around
Axle center is uniformly distributed at least three hinged seats (6), has been respectively articulated with swelling pawl (5) on each hinged seat (6), the swelling pawl (5)
Fixing end (5-2) and hinged seat (6) by bolt (8) hingedly, the free end (5-1) of the swelling pawl (5) is extended hingedly
Seat (6) is cased with tight sleeve (9) on the shaft part of the centration axis (1), and the front end of the tight sleeve (9) is equipped with for pushing swelling
The push-plate (9-3) of pawl (5) free end (5-1) movement, the push-plate (9-3) are equipped with guide surface (9-2), the tight sleeve (9)
Rear end preloading spring (4) are set, the preloading spring (4) covers on the shaft part of centration axis (1), by with centration axis (1) spiral shell
The clamp nut (2) of line cooperation compresses, and the push-plate (9-3) of tight sleeve (9) front end is made to push swelling pawl (5) free end (5-1) fortune
Dynamic is in self-centering tensioning state, is fixed for being tensioned part from inner bore of part.
2. compensation keeps clamping device in the self-centering hole of tension automatically when heat parts according to claim 1, special
Sign is: the flange (7) for installing swelling pawl (5) is arranged in the middle section of centration axis (1), two axis of the flange (7)
At least three hinged seats (6) all are uniformly distributed around axle center on end face, have been respectively articulated with swelling pawl (5) on each hinged seat (6), it is described
The both ends of centration axis (1) shaft part are cased with tight sleeve (9), and the front end of two tight sleeves (9) is equipped with for pushing swelling pawl (5) certainly
By the push-plate (9-3) for holding (5-1) to move, the rear end of two tight sleeves (9) is respectively provided with preloading spring (4), and each preloading spring (4) is respectively
It covers on the shaft part of centration axis (1), is compressed by the clamp nut (2) being threadedly engaged with centration axis (1), make two tight sleeves
(9) push-plate (9-3) of front end pushes swelling pawl (5) free end (5-1) of flange (7) two axial ends to move in self-centering tensioning respectively
State is fixed for being tensioned part from inner bore of part.
3. compensation keeps clamping device in the self-centering hole of tension automatically when heat parts according to claim 1, special
Sign is: the flange (7) for installing swelling pawl (5) is arranged in one end end of centration axis (1), and the flange (7) is right
It answers and is uniformly distributed at least three hinged seats (6) around axle center in the axial end of shaft side, be respectively articulated on each hinged seat (6) swollen
Tight pawl (5).
4. compensation keeps clamping device in the self-centering hole of tension automatically when heat parts according to claim 1, special
Sign is: the end of swelling pawl (5) free end (5-1) is circular shape.
5. compensation keeps clamping device in the self-centering hole of tension automatically when heat parts according to claim 1, special
Sign is: the axially extending bore of the tight sleeve (9) is set as stepped hole (9-1), and the bigger diameter end of the stepped hole (9-1), which is located at, to be held out against
(9) rear end is covered, the preloading spring (4), which is mounted in the bigger diameter end of the stepped hole (9-1), and part is overhanging makes clamp nut (2)
It can press to preloading spring (4).
6. compensation keeps clamping device in the self-centering hole of tension automatically when heat parts according to claim 1, special
Sign is: the guide surface (9-2) of the push-plate (9-3) is arc surface.
7. compensation keeps clamping device in the self-centering hole of tension automatically when heat parts according to claim 1, special
Sign is: the guide surface (9-2) of the push-plate (9-3) is inclined-plane.
8. compensation keeps clamping device in the self-centering hole of tension automatically when heat parts according to claim 1, special
Sign is: the circumference of the flange (7) is equipped with multiple lifting grooves (7-1).
9. compensation keeps clamping device in the self-centering hole of tension automatically when heat parts according to claim 1, special
Sign is: the hinged seat (6) includes symmetrically arranged two brackets (6-1), and swelling pawl is arranged between two brackets (6-1)
(5).
10. compensation keeps clamping device in the self-centering hole of tension automatically when heat parts according to claim 1, special
Sign is: the circumference of the flange (1) be equipped with multiple resigning breach (7-2), the position of each resigning breach (7-2) respectively with hinge
Joint chair (6) is corresponding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810531752.9A CN108942068B (en) | 2018-05-29 | 2018-05-29 | Self-centering hole clamping device capable of automatically compensating and maintaining tension during high-temperature heating of part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810531752.9A CN108942068B (en) | 2018-05-29 | 2018-05-29 | Self-centering hole clamping device capable of automatically compensating and maintaining tension during high-temperature heating of part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108942068A true CN108942068A (en) | 2018-12-07 |
| CN108942068B CN108942068B (en) | 2020-11-03 |
Family
ID=64492334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810531752.9A Active CN108942068B (en) | 2018-05-29 | 2018-05-29 | Self-centering hole clamping device capable of automatically compensating and maintaining tension during high-temperature heating of part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108942068B (en) |
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| CN104368838A (en) * | 2014-11-19 | 2015-02-25 | 常州市常欧金属制品有限公司 | Expansion fixture |
| CN104551069A (en) * | 2014-12-22 | 2015-04-29 | 重庆博钻太阳能灯具有限公司 | Tooling for processing lamp spherical holder |
| CN104607681A (en) * | 2013-11-03 | 2015-05-13 | 西安志越机电科技有限公司 | Thin-wall round pipe turning and clamping device |
| CN205270916U (en) * | 2015-10-30 | 2016-06-01 | 安徽志成机械科技有限公司 | Ball valve spool adds clamping apparatus |
| CN205888470U (en) * | 2016-06-16 | 2017-01-18 | 山西天波制泵股份有限公司 | Three -jaw centering internal stay fixture |
| CN106624009A (en) * | 2016-11-23 | 2017-05-10 | 苏州经贸职业技术学院 | Lathe fixture |
| WO2017176607A1 (en) * | 2016-04-07 | 2017-10-12 | The Gleason Works | Workholding arbor for gears |
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB122971A (en) * | 1918-04-12 | 1919-02-13 | John Alfred Davenport | Improvements in, and relating to, Chucks and Drivers. |
| US7748718B2 (en) * | 2005-06-20 | 2010-07-06 | The Gleason Works | Expanable mandrel |
| CN201558974U (en) * | 2009-11-14 | 2010-08-25 | 温州市冠盛汽车零部件集团股份有限公司 | Three-ball-pin type sliding end universal joint self-centering tensioning fixture |
| CN104607681A (en) * | 2013-11-03 | 2015-05-13 | 西安志越机电科技有限公司 | Thin-wall round pipe turning and clamping device |
| CN104368838A (en) * | 2014-11-19 | 2015-02-25 | 常州市常欧金属制品有限公司 | Expansion fixture |
| CN104551069A (en) * | 2014-12-22 | 2015-04-29 | 重庆博钻太阳能灯具有限公司 | Tooling for processing lamp spherical holder |
| CN205270916U (en) * | 2015-10-30 | 2016-06-01 | 安徽志成机械科技有限公司 | Ball valve spool adds clamping apparatus |
| WO2017176607A1 (en) * | 2016-04-07 | 2017-10-12 | The Gleason Works | Workholding arbor for gears |
| CN205888470U (en) * | 2016-06-16 | 2017-01-18 | 山西天波制泵股份有限公司 | Three -jaw centering internal stay fixture |
| CN106624009A (en) * | 2016-11-23 | 2017-05-10 | 苏州经贸职业技术学院 | Lathe fixture |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108942068B (en) | 2020-11-03 |
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