CN110549145B - Internal stay formula clamping frock - Google Patents
Internal stay formula clamping frock Download PDFInfo
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- CN110549145B CN110549145B CN201910885660.5A CN201910885660A CN110549145B CN 110549145 B CN110549145 B CN 110549145B CN 201910885660 A CN201910885660 A CN 201910885660A CN 110549145 B CN110549145 B CN 110549145B
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- 230000008093 supporting effect Effects 0.000 claims abstract description 37
- 230000009191 jumping Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 15
- 230000003014 reinforcing effect Effects 0.000 description 10
- 230000001976 improved effect Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 7
- 238000003754 machining Methods 0.000 description 7
- 239000000306 component Substances 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000010009 beating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention provides an internal support type clamping tool which is used for clamping and positioning an annular workpiece on a machine tool and comprises the following components: the inner support disc is provided with a first connecting part which is used for being connected with a machine tool; the inner supporting disc is provided with an outer arc surface, wherein the inner supporting disc is used for extending into the inner ring of the annular workpiece, and the outer arc surface is abutted against the inner circumferential surface of the annular workpiece under the drive of the machine tool. By the technical scheme, the wheel rim clamping the wheel hub is effectively avoided, and the problems of dynamic balance out-of-tolerance and jumping out-of-tolerance are solved.
Description
Technical Field
The invention relates to the technical field of machining, in particular to an internal stay type clamping tool.
Background
The finish turning bright surface of the hub is generally clamped by adopting a three-flap type fan-shaped chuck, when the fan-shaped chuck clamps the hub after being coated, the chuck needs to keep larger clamping force for clamping because the contact surface of the hub and the chuck is in linear contact, the coating is easy to clamp, a clamping mark is left on the hub, the clamping mode has larger influence on dynamic balance and runout, the contact part of the chuck and the hub slightly deviates when in clamping, the other side of the hub generates larger deflection after turning, the dynamic balance quantity and runout of the wheel are amplified by times, the dynamic balance and runout are easy to disqualified and scrapped, and the larger the width of the rim is, the larger the dynamic balance deviation is amplified; in addition, some engineering hubs need to finish turning an outer rim, a rear rim is also required to be cut off, when the fan-shaped chuck is used for clamping the hub for finish turning, the hub can only be clamped on the rear rim for finish turning a section of outer rim and the front rim, then the hub is clamped on the front rim in a turning way, and then the rear rim is cut off after finishing turning the outer rim.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
Therefore, the invention aims to provide an internal stay type clamping tool.
In order to achieve the above object, the technical scheme of the invention provides an internal bracing type clamping tool for clamping and positioning an annular workpiece on a machine tool, comprising: the inner support disc is provided with a first connecting part which is used for being connected with a machine tool; the inner supporting disc is provided with an outer arc surface, wherein the inner supporting disc is used for extending into the inner ring of the annular workpiece, and the outer arc surface is abutted against the inner circumferential surface of the annular workpiece under the drive of the machine tool.
In the technical scheme, the inner support disc is adopted to extend into the inner ring of the annular workpiece, the outer cambered surface of the inner support disc is abutted against the inner circumferential surface of the annular workpiece, namely, the inner support disc is abutted against the inner circumferential surface of the annular workpiece in the annular workpiece, and meanwhile, the inner support disc is connected with the machine tool through the first connecting part, so that the purpose of clamping the annular workpiece on the machine tool can be achieved through friction force between the inner support disc and the annular workpiece.
Specifically, through the arrangement of the first connecting part, an inner support disc of the inner support type clamping tool can be connected to a machine tool, so that the annular workpiece is convenient to connect with the machine tool through the inner support type clamping tool; the inner supporting disc is provided with the outer cambered surface, the outer cambered surface is abutted against the inner circumferential surface of the annular workpiece, namely, the inner supporting type clamping tool and the annular workpiece are in surface contact, so that when the inner supporting type clamping tool is tensioned, the annular workpiece is small in pressure intensity, is not easy to clamp and is not easy to generate clamping marks or propping marks, and the inner supporting type clamping tool clamps from the inner part of the annular workpiece, so that even if the clamping marks are generated, the influence caused by the clamping marks can be reduced because the outer part is difficult to see; the inner support disc is connected with the machine tool, so that the inner support disc can firstly extend into the inner ring of the annular workpiece and then abut against the annular workpiece under the driving of the machine tool, and the stability, reliability and convenience of clamping are improved.
It will be appreciated that the first connection portion and the extrados are provided on different surfaces of the inner support disc, respectively, for example, the first connection portion is provided on an end face of the inner support disc and the extrados is provided on a peripheral face of the inner support disc.
In the above technical scheme, a convex ring is arranged at one end of the outer cambered surface, which is far away from the first connecting part, and the convex ring is arranged along the circumferential direction of the outer cambered surface and protrudes outwards along the radial direction of the outer cambered surface; the outer cambered surface and/or the convex ring are/is provided with a first groove, and the first groove is arranged along the circumferential direction of the outer cambered surface.
According to the technical scheme, the convex ring is arranged on the outer cambered surface, so that annular workpieces with different inner diameters can be clamped more flexibly, the annular workpieces with a certain gradient on the inner ring can be matched better, further, the height difference between the convex ring and the outer cambered surface can meet the feeding safety of a cutter for cutting the annular workpieces, the processing quality of the cutting surface of the annular workpieces is improved, and the cutter is prevented from cutting the outer cambered surface; the first grooves are formed in the outer cambered surface and/or the convex ring, so that reinforcing ribs such as convex peaks on the inner ring of the annular workpiece can be avoided, and the unstable clamping or clamping damage of the reinforcing ribs such as convex peaks caused by the fact that the outer cambered surface or the convex ring is abutted against the reinforcing ribs such as the convex peaks is avoided; in addition, the bulge loop sets up the one end of keeping away from first connecting portion on the extrados, has certain interval between bulge loop and the first connecting portion promptly, makes extrados have sufficient length in the axial in order to be convenient for the clamping of wheel hub, avoids the wheel hub and the bulge loop of clamping on extrados to take place to interfere, and compact structure, occupation space is few.
In any one of the above technical solutions, the first connecting portion is disposed on an axial end surface of the inner support disc; the first connecting portion comprises a threaded hole, and the inner supporting disc is connected with the machine tool through the threaded hole and a bolt.
In this technical scheme, locate the axial terminal surface of interior support dish with first connecting portion, be convenient for avoid the inner circle of extrados and annular work piece, promote the convenience of interior support dish installation and annular work piece installation on the lathe.
In the above technical scheme, the first connecting part is provided with a rack which is used for being matched with a machine tool so as to adjust the position of the inner supporting disc.
In the technical scheme, by arranging the racks, the rack is pushed by the components such as the gear and the rack on the machine tool, and then the position of the inner supporting disc is adjusted, so that the inner supporting disc can move outwards along the radial direction to be abutted against the annular workpiece, and move inwards along the radial direction to be separated from the annular workpiece.
In any one of the above technical solutions, one end of the inner support disc provided with the first connecting portion is provided with a limiting portion protruding radially outwards.
In this technical scheme, through being equipped with the one end of first connecting portion, be equipped with along radial outside convex spacing portion, be equipped with spacing portion in the one end that the internal stay formula clamping frock is close to the lathe promptly, can restrict the axial displacement of annular work piece like this, install on the lathe in the internal stay formula clamping frock, after the annular work piece is installed on the internal stay formula clamping frock, can avoid annular work piece to take place axial displacement and bump with the lathe when high-speed rotation, promoted the security of machining.
In any of the above technical solutions, the number of the inner supporting disks is plural, and the plural inner supporting disks are distributed in central symmetry.
In this technical scheme, the quantity of interior brace dish is a plurality of, and a plurality of interior brace dish is central symmetry and distributes, be favorable to making a plurality of interior brace dishes evenly support on the inner circumference of annular work piece like this for annular work piece atress is even, is favorable to promoting the stability when annular work piece high-speed rotation, and the interior brace dish of central symmetry distribution supports on the inner circumference of annular work piece, still is convenient for the centre bore location of annular work piece, is favorable to reducing the deviation of annular work piece installation, and then avoids the annular work piece after the machining to produce the skew, has solved the problem of the dynamic balance out-of-tolerance and the out-of-tolerance of beating of annular work piece.
In the above technical scheme, the internal bracing formula clamping frock still includes: the fixed core assembly is provided with a second connecting part which is used for being connected with a machine tool; one end of the fixed core component, which is far away from the second connecting part, is provided with a first fixed core shaft; the inner supporting disc is in a sector shape, and a plurality of sector-shaped inner supporting discs enclose a shaft hole; the first locating mandrel is positioned in the shaft hole and is used for extending into the inner ring of the annular workpiece so as to locate the central hole of the annular workpiece.
In this technical scheme, through setting up the core subassembly, and the core subassembly is decided including first certain dabber, first certain dabber sets up in the shaft hole that a plurality of fan-shaped internal stay dish enclose out, and first certain dabber can pass in the internal stay dish stretches into annular work piece like this to the centre bore position of annular work piece is fixed a position, and such simple structure, the center of annular work piece is easily fixed a position, is favorable to further reducing annular work piece's installation skew, avoids annular work piece dynamic balance after the processing and the disqualification of beating.
In the above technical scheme, the centering assembly further comprises: the positioning disc is sleeved outside the positioning mandrel; the inner ring of the annular workpiece is provided with a mounting disc, and the positioning disc is used for abutting against the mounting disc.
In this technical scheme, through setting up the positioning disk to when annular work piece carries out the clamping, the positioning disk can support and lean on the mounting disc, can restrict annular work piece's axial displacement like this, avoid annular work piece to take place the processing deviation because of axial displacement when rotatory, can also avoid annular work piece to take place the collision because of axial displacement with the lathe and lead to the incident.
In the above technical scheme, the centering assembly further comprises: the base, the second connecting portion is located on the base.
In the above technical scheme, the centering assembly further comprises: one end of the second fixed core shaft is arranged in the base; the other end of the second fixed mandrel is provided with an axial second groove; the positioning disc is arranged between the second fixed mandrel and the first fixed mandrel; an axial first bulge is arranged at one end of the first fixing mandrel, which is close to the second connecting part, and the diameter of the first bulge is smaller than that of the first fixing mandrel; the positioning plate is provided with a second bulge, and a third groove is arranged at a position corresponding to the second bulge on the positioning plate; the positioning disk is arranged between the first fixing core shaft and the second fixing core shaft, the third groove is sleeved on the first protrusion, and the second protrusion is arranged in the second groove.
In the technical scheme, the positioning disc is arranged between the first positioning shaft and the second positioning shaft, so that the axial displacement of the positioning disc is conveniently limited, and the positioning disc is ensured to limit the mounting disc on the annular workpiece; the third groove on the positioning disk is sleeved on the first bulge on the first positioning shaft, and the second bulge on the positioning disk is arranged in the second groove on the second positioning shaft, so that radial displacement of the positioning disk is limited, and the positioning disk is prevented from being radially deflected to be contacted with the inner circumferential surface of the annular workpiece to cause scratches.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic front view of an inner support disc of an inner support clamping tool according to an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1 in the direction A-A;
FIG. 3 is a schematic rear view of an inner support disc of an inner support clamping tool according to an embodiment of the present invention;
fig. 4 is a schematic top view of an inner support disc of an inner support type clamping tool according to an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of the structure at B in FIG. 2;
FIG. 6 is an enlarged schematic view of the structure at C in FIG. 2;
FIG. 7 is a schematic cross-sectional view of the structure of FIG. 3 in the direction D-D;
FIG. 8 is a schematic diagram of a front view of a centering assembly of an internal bracing type clamping fixture according to an embodiment of the present invention;
fig. 9 is a schematic sectional view of the structure of fig. 8 in the direction E-E.
Wherein, the correspondence between the reference numerals and the component names in fig. 1 to 9 is:
10 inner supporting plates, 100 first connecting parts, 102 outer cambered surfaces, 103 convex rings, 104 first grooves, 106 threaded holes, 108 racks, 110 limiting parts, 20 centering components, 200 second connecting parts, 202 first centering shafts, 204 positioning plates, 206 bases, 208 second centering shafts, 210 first bulges and 212 second bulges.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
Some embodiments according to the present invention are described below with reference to fig. 1 to 9.
As shown in fig. 1 to 7, an internal bracing type clamping tool according to an embodiment of the present invention is used for clamping and positioning an annular workpiece on a machine tool, and includes: the inner support disc 10, the inner support disc 10 is provided with a first connecting part 100, and the first connecting part 100 is used for connecting with a machine tool; the inner supporting disc 10 is provided with an outer cambered surface 102, wherein the inner supporting disc 10 is used for extending into the inner ring of the annular workpiece, and the outer cambered surface 102 abuts against the inner circumferential surface of the annular workpiece under the drive of a machine tool.
In some embodiments, the annular workpiece is a hub, more specifically an engineered hub, and the engineered hub eventually requires a cut-out rear rim.
In this embodiment, the inner support disc 10 is adopted to extend into the inner ring of the annular workpiece, the outer cambered surface 102 of the inner support disc 10 abuts against the inner circumferential surface of the annular workpiece, namely, the inner support disc 10 abuts against the inner circumferential surface of the annular workpiece in the annular workpiece, and meanwhile, the inner support disc 10 is connected with the machine tool through the first connecting part 100, so that the purpose of clamping the annular workpiece on the machine tool can be achieved through friction force between the inner support disc 10 and the annular workpiece.
As shown in fig. 2, specifically, the inner support disc 10 of the inner support type clamping tool can be connected to the machine tool through the arrangement of the first connecting part 100, so that the annular workpiece is convenient to be connected with the machine tool through the inner support type clamping tool; the outer arc surface 102 is arranged on the inner supporting disc 10, the outer arc surface 102 is abutted against the inner circumferential surface of the annular workpiece, namely, the inner supporting type clamping tool and the annular workpiece are in surface contact, so that when the inner supporting type clamping tool is tensioned, the annular workpiece is small in pressure intensity, is not easy to clamp and is not easy to generate clamping marks or propping marks, and even if the clamping marks are generated, the influence caused by the clamping marks can be reduced due to the fact that the outer part is difficult to see because the inner supporting type clamping tool clamps the annular workpiece; the inner support disc 10 is connected with the machine tool, so that the inner support disc 10 can firstly extend into the inner ring of the annular workpiece and then abut against the annular workpiece under the driving of the machine tool, and the stability, reliability and convenience of clamping are improved.
It should be noted that the inner supporting disc 10 clamps the annular workpiece in a manner of propping against the inner part of the annular workpiece, when the annular workpiece is a hub, the front rim and the rear rim of the hub can be directly machined, the hub is not required to be disassembled and clamped again after the front rim is machined, namely, the front rim and the rear rim can be machined only by one-time clamping, the working efficiency is saved, and the condition that the front rim of the hub is clamped is avoided.
As shown in fig. 2, it can be understood that the first connection portion 100 and the outer arc surface 102 are provided on different surfaces of the inner stay 10, respectively, for example, the first connection portion 100 is provided on an end surface of the inner stay 10, and the outer arc surface 102 is provided on a circumferential surface of the inner stay 10.
As shown in fig. 4 and 5, in the above embodiment, the outer arc surface 102 is provided with a convex ring 103 at an end far from the first connecting portion 100, the convex ring 103 is disposed along the circumferential direction of the outer arc surface 102 and protrudes outward in the radial direction of the outer arc surface 102; the outer arc surface 102 and/or the convex ring 103 are provided with first grooves 104, and the first grooves 104 are arranged along the circumferential direction of the outer arc surface 102.
In the embodiment, the convex ring 103 is arranged on the outer arc surface 102, so that annular workpieces with different inner diameters can be clamped more flexibly, annular workpieces with a certain gradient on the inner ring can be matched better, and further, the height difference between the convex ring 103 and the outer arc surface 102 can meet the feeding safety of a cutter for cutting the annular workpieces, the processing quality of the cutting surface of the annular workpieces is improved, and the cutter is prevented from cutting the outer arc surface 102; the first grooves 104 are arranged on the outer cambered surface 102 and/or the convex ring 103, so that reinforcing ribs such as convex peaks on the inner ring of the annular workpiece can be avoided, and the phenomenon that the outer cambered surface 102 or the convex ring 103 is abutted against the reinforcing ribs such as the convex peaks to cause unstable clamping or damage to the reinforcing ribs such as the convex peaks is avoided; in addition, the convex ring 103 is disposed at one end of the outer arc surface 102 far away from the first connecting portion 100, that is, a certain distance is provided between the convex ring 103 and the first connecting portion 100, so that the outer arc surface 102 has a sufficient length in the axial direction to facilitate clamping of the hub, interference between the hub clamped on the outer arc surface 102 and the convex ring 103 is avoided, and the structure is compact and occupies less space.
In some embodiments, the reinforcing lobes are provided on the inner circumferential surface of the hub, and the reinforcing lobes may be avoided by providing the first grooves 104 on the extrados 102.
As shown in fig. 5, in any of the above embodiments, the first connecting portion 100 is provided on the axial end surface of the inner stay 10; the first coupling part 100 includes a screw hole 106, and the inner stay 10 is coupled to a machine tool through the screw hole 106 and a bolt.
In this embodiment, the first connecting portion 100 is provided on the axial end face of the inner stay 10 so as to avoid the outer arc surface 102 and the inner ring of the annular workpiece, improving the convenience of mounting the inner stay 10 on the machine tool and the convenience of mounting the annular workpiece.
As shown in fig. 3 to 7, in the above embodiment, the first connecting portion 100 is provided with the rack 108, and the rack 108 is used to cooperate with a machine tool to adjust the position of the inner race 10.
In this embodiment, by arranging the rack 108, the rack 108 is pushed by the gear, the rack and other components on the machine tool, so that the position of the inner support disc 10 is adjusted, the inner support disc 10 can move outwards along the radial direction to abut against the annular workpiece, and move inwards along the radial direction to be separated from the annular workpiece, so that the structure is simple, the position of the inner support disc 10 is easy to adjust, and the convenience of using the inner support type clamping tool is improved.
As shown in fig. 2, in any of the above embodiments, the inner stay 10 is provided with a stopper portion 110 protruding radially outward at one end where the first connection portion 100 is provided.
In this embodiment, by providing the limiting portion 110 protruding radially outwards at the end provided with the first connecting portion 100, that is, the end of the inner support type clamping tool, which is close to the machine tool, is provided with the limiting portion 110, the axial displacement of the annular workpiece can be limited, the inner support type clamping tool is mounted on the machine tool, after the annular workpiece is mounted on the inner support type clamping tool, the annular workpiece can be prevented from being axially displaced and colliding with the machine tool when rotating at a high speed, and the machining safety is improved.
As shown in fig. 2, it may be understood that the first connecting portion 100 and the limiting portion 110 may partially overlap, or may be separately and independently disposed.
In any of the above embodiments, the number of the inner stay plates 10 is plural, and the plurality of inner stay plates 10 are distributed in a central symmetry.
In this embodiment, the number of the inner supporting discs 10 is multiple, and the inner supporting discs 10 are distributed in a central symmetry manner, so that the inner supporting discs 10 are uniformly abutted against the inner circumferential surface of the annular workpiece, the annular workpiece is uniformly stressed, the stability of the annular workpiece during high-speed rotation is improved, the inner supporting discs 10 distributed in a central symmetry manner are abutted against the inner circumferential surface of the annular workpiece, the positioning of the central hole of the annular workpiece is facilitated, the deviation of the installation of the annular workpiece is reduced, the deviation of the annular workpiece after machining is avoided, and the problems of out-of-tolerance and out-of-tolerance of dynamic balance of the annular workpiece are solved.
As shown in fig. 8 and 9, in the above embodiment, the inner support type clamping tool further includes: the fixed core assembly 20, the fixed core assembly 20 is provided with a second connecting part 200, and the second connecting part 200 is used for being connected with a machine tool; one end of the centering component 20, which is far away from the second connecting part 200, is provided with a first centering shaft 202; the inner support disc 10 is in a sector shape, and a plurality of sector-shaped inner support discs 10 enclose a shaft hole; the first fixing mandrel 202 is located in the shaft hole, and the first fixing mandrel 202 is used for extending into the inner ring of the annular workpiece to locate the central hole of the annular workpiece.
Optionally, the second connecting portion is provided with a plurality of threaded holes.
In this embodiment, through setting up centering subassembly 20, and centering subassembly 20 includes first fixing dabber 202, and first fixing dabber 202 sets up in the shaft hole that the internal stay dish 10 of a plurality of sectors encloses, and first fixing dabber 202 can pass internal stay dish 10 like this and stretch into in the annular work piece to the centre bore position of annular work piece is fixed a position, and such simple structure, the center of annular work piece easily fixes a position is favorable to further reducing annular work piece's installation skew, avoids annular work piece dynamic balance after the processing and beats inequality.
In the above embodiment, the centering assembly 20 further includes: the positioning disc 204 is sleeved outside the positioning core shaft; the inner ring of the annular workpiece is provided with a mounting disc, and the positioning disc 204 is used for abutting against the mounting disc.
In this embodiment, the positioning disc 204 is provided, so that when the annular workpiece is clamped, the positioning disc 204 can abut against the mounting disc, thus the axial displacement of the annular workpiece can be limited, the machining deviation caused by the axial displacement when the annular workpiece rotates can be avoided, and the safety accident caused by the collision between the annular workpiece and the machine tool due to the axial displacement can also be avoided.
In the above embodiment, the centering assembly 20 further includes: the base 206, the second connection portion 200 is disposed on the base 206.
In the above embodiment, the centering assembly 20 further includes: a second mandrel 208, one end of which is disposed in the base 206; the other end of the second mandrel 208 is provided with an axial second groove; the positioning disk 204 is arranged between the second positioning shaft 208 and the first positioning shaft 202; an axial first protrusion 210 is arranged at one end of the first fixing mandrel 202, which is close to the second connecting part 200, and the diameter of the first protrusion 210 is smaller than that of the first fixing mandrel 202; the positioning disk 204 is provided with a second bulge 212, and a third groove is arranged on the positioning disk 204 at a position corresponding to the second bulge 212; the positioning plate 204 is disposed between the first positioning shaft 202 and the second positioning shaft 208, and the third groove is sleeved on the first protrusion 210, and the second protrusion 212 is disposed in the second groove.
In this embodiment, by disposing the positioning disc 204 between the first positioning shaft 202 and the second positioning shaft 208, the axial displacement of the positioning disc 204 is conveniently limited, and the third groove on the positioning disc 204 is sleeved on the first protrusion 210, so as to limit the displacement of the positioning disc 204 towards the first positioning shaft 202, and the second protrusion 212 is disposed in the second groove, so as to limit the displacement of the positioning disc 204 towards the second positioning shaft, so that the limitation of the positioning disc 204 to the mounting disc on the annular workpiece is ensured; in addition, the third groove on the positioning disc 204 is sleeved on the first protrusion 210 on the first positioning shaft 202, and the second protrusion 212 on the positioning disc 204 is arranged in the second groove on the second positioning shaft 208, so that radial displacement of the positioning disc 204 is limited, and scratches caused by contact between the positioning disc 204 and the inner circumferential surface of the annular workpiece due to radial offset are avoided.
According to the internal stay formula clamping frock of a concrete embodiment that this application provided for the clamping of wheel hub when carrying out machining adopts the fan-shaped internal stay dish 10 of three lamella, adopts the outer cambered surface 102 of internal stay dish 10 to contact wheel hub's interior rim face, and interior rim face coating performance requirement is lower, and anchor clamps are big with the area of contact of rim, and the pressure of anchor clamps to the rim coating is little, and the coating is difficult for being damaged by the pressure, is difficult for producing the centre gripping seal.
The internal stay formula clamping frock still is equipped with the core subassembly 20, and the core subassembly 20 is decided including first fixed mandrel 202 and positioning disk 204, fixes a position the support to wheel hub's centre bore and installation quotation respectively, installs just more easily, guarantees the clamping precision, reduces the abandonment that leads to the fact because of dynamic balance out of tolerance and beat out of tolerance by a wide margin.
The three-flap type fan-shaped inner support disc 10 is also provided with a plurality of first grooves 104 matched with the reinforcing convex peaks on the inner rim of the hub so as to prevent the inner support disc 10 from leaning against the reinforcing convex peaks.
The technical scheme of the invention is explained in detail above with reference to the attached drawings, and by the technical scheme of the invention, the wheel rim of the wheel hub is effectively prevented from being damaged by clamping, and the problems of dynamic balance out-of-tolerance and jumping out-of-tolerance are solved.
In the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An internal stay formula clamping frock for annular work piece is in clamping location on lathe, its characterized in that includes:
the inner support plate is provided with a first connecting part which is used for being connected with the machine tool, and the number of the inner support plates is multiple;
the inner supporting disc is provided with an outer arc surface, and is used for extending into the inner ring of the annular workpiece and abutting against the inner circumferential surface of the annular workpiece under the drive of the machine tool;
the fixed core assembly is provided with a second connecting part which is used for being connected with the machine tool;
one end, far away from the second connecting part, of the centering component is provided with a first centering shaft;
the inner supporting disc is in a fan shape, and shaft holes are formed in the inner supporting discs in a surrounding mode;
the first positioning mandrel is positioned in the shaft hole and is used for extending into the inner ring of the annular workpiece so as to position the central hole of the annular workpiece;
the centering assembly further comprises: the positioning disc is sleeved outside the fixed core shaft;
a mounting disc is arranged on the inner ring of the annular workpiece, and the positioning disc is used for propping against the mounting disc;
the centering assembly further comprises: the second connecting part is arranged on the base;
the centering assembly further comprises: one end of the second fixed core shaft is arranged in the base;
the other end of the second fixed mandrel is provided with an axial second groove;
the positioning disc is arranged between the second fixed mandrel and the first fixed mandrel;
an axial first bulge is arranged at one end of the first fixing mandrel, which is close to the second connecting part, and the diameter of the first bulge is smaller than that of the first fixing mandrel;
the positioning disc is provided with a second bulge, and a third groove is formed in the position, corresponding to the second bulge, of the positioning disc;
the positioning disc is arranged between the first fixing mandrel and the second fixing mandrel, the third groove is sleeved on the first protrusion, and the second protrusion is arranged in the second groove.
2. The internal stay type clamping tool according to claim 1, wherein,
a convex ring is arranged at one end, far away from the first connecting part, of the outer cambered surface, and is arranged along the circumferential direction of the outer cambered surface and protrudes outwards along the radial direction of the outer cambered surface;
the outer cambered surface and/or the convex ring are/is provided with a first groove, and the first groove is arranged along the circumferential direction of the outer cambered surface.
3. The internal stay type clamping tool according to claim 1 or 2, wherein,
the first connecting part is arranged on the axial end face of the inner supporting disc;
the first connecting portion comprises a threaded hole, and the inner supporting disc is connected with the machine tool through the threaded hole and a bolt.
4. The internal stay type clamping tool according to claim 3, wherein,
the first connecting part is provided with a rack which is used for being matched with the machine tool so as to adjust the position of the inner supporting disc.
5. The internal stay type clamping tool according to claim 1 or 2, wherein,
one end of the first connecting part is arranged on the inner supporting disc, and a limiting part protruding outwards along the radial direction is arranged on the inner supporting disc.
6. The internal stay type clamping tool according to claim 1 or 2, wherein,
the inner supporting discs are distributed in a central symmetry mode.
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| CN201910885660.5A CN110549145B (en) | 2019-09-19 | 2019-09-19 | Internal stay formula clamping frock |
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| CN110549145B true CN110549145B (en) | 2024-04-09 |
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| CN113523854B (en) * | 2021-07-30 | 2022-09-27 | 西北机器有限公司 | Machining tool and machining method for thin-wall rotating curved surface part |
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Application publication date: 20191210 Assignee: ZHEJIANG JINTAI AUTO PARTS MANUFACTURING CO.,LTD. Assignor: ZHEJIANG JINFEI KAIDA WHEEL Co.,Ltd. Contract record no.: X2024980004380 Denomination of invention: Internally supported clamping fixture Granted publication date: 20240409 License type: Common License Record date: 20240412 |