CN210756514U - Internal stay formula clamping frock - Google Patents

Abstract

The utility model provides an internal stay formula clamping frock for the clamping location of annular workpiece on the lathe, include: the inner supporting disc is provided with a first connecting part, and the first connecting part 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 driving of a machine tool. Through the technical scheme of the utility model, avoided pressing from both sides the rim of hindering wheel hub effectively to the problem of dynamic balance out of tolerance and beat out of tolerance has been solved.

Description

Internal stay formula clamping frock

Technical Field

The utility model relates to a machine tooling technical field particularly, relates to an internal stay formula clamping frock.

Background

The hub finish turning bright surface is generally clamped by adopting a three-petal type fan-shaped chuck, when the coated hub is clamped by the fan-shaped chuck, because the contact surface of the hub and the chuck is in linear contact, the chuck needs to keep a larger clamping force for clamping firmly, a coating is easy to be damaged by clamping, a clamping mark is left on the hub, the influence of the clamping mode on dynamic balance and runout is larger, the contact part of the chuck and the hub slightly deviates during clamping, the other side of the hub after turning can generate larger deflection, the dynamic balance and runout of the wheel can be multiplied, the dynamic balance and runout are easy to discard due to disqualification, and the wider the width of the rim is, the larger the magnification factor of the dynamic balance deviation is; in addition, some engineering hubs need to finish turning outer wheel rims and also need to cut off rear wheel rims, when a fan-shaped chuck is used for clamping the hubs for finish turning, only one section of outer wheel rim and one section of front wheel rim can be clamped on the rear wheel rim for finish turning, then the outer wheel rim is turned around and clamped on the front wheel rim, and after finish turning of the outer wheel rim, the rear wheel rim is cut off.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

In view of this, the utility model aims at providing an internal stay formula clamping frock.

In order to realize the above object, the technical scheme of the utility model provides an internal stay formula clamping frock for the clamping location of annular workpiece on the lathe, include: the inner supporting disc is provided with a first connecting part, and the first connecting part 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 driving of a machine tool.

In this technical scheme, adopt interior dish that props to stretch into the inner circle of annular work piece, the extrados of interior dish that props supports with the interior circumference of annular work piece and leans on, prop the dish in the annular work piece inside rather than supporting promptly and lean on, simultaneously, interior dish that props is connected through first connecting portion and lathe, can reach the purpose of clamping annular work piece on the lathe through the frictional force between interior dish and the annular work piece like this.

Specifically, the inner supporting disc of the inner supporting type clamping tool can be connected to a machine tool through the arrangement of the first connecting part, so that the annular workpiece can be conveniently connected with the machine tool through the inner supporting type clamping tool; the inner supporting disc is provided with the outer arc surface, the outer arc surface is abutted against the inner circumferential surface of the annular workpiece, namely the inner supporting type clamping tool is in surface contact with the annular workpiece, so that when the inner supporting type clamping tool is tensioned, the pressure on the annular workpiece is small, the annular workpiece is not easy to be clamped and damaged, and clamping marks or top marks are not easy to generate; the inner supporting disc is connected with the machine tool, so that the inner supporting 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 respectively provided on different surfaces of the inner support disc, for example, the first connection portion is provided on an end surface of the inner support disc and the extrados is provided on a circumferential surface of the inner support disc.

In the technical scheme, a convex ring is arranged at one end of the outer arc surface, which is far away from the first connecting part, and the convex ring is arranged along the circumferential direction of the outer arc surface and protrudes outwards along the radial direction of the outer arc surface; the outer arc surface and/or the convex ring are/is provided with a first groove which is arranged along the circumferential direction of the outer arc surface.

In the technical scheme, the convex ring is arranged on the outer arc surface, so that annular workpieces with different inner diameters can be clamped more flexibly, the annular workpieces with certain gradients on the inner ring can be better adapted, further, the height difference between the convex ring and the outer arc surface can meet the requirement of the cutting tool feeding safety 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; the first grooves are formed in the outer arc surface and/or the convex ring, so that the convex peaks and other reinforcing ribs on the inner ring of the annular workpiece can be avoided, and the situation that the outer arc surface or the convex ring abuts against the convex peaks and other reinforcing ribs to cause unstable clamping or damage to the convex peaks and other reinforcing ribs 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 so that wheel hub's clamping in the axial, avoids wheel hub and the bulge loop of clamping on the extrados to take place to interfere, and compact structure, and occupation space is few.

In any one of the above technical solutions, the first connecting portion is provided at an axial end face of the inner support disc; the first connecting portion comprise a threaded hole, and the inner support disc is connected with a machine tool through the threaded hole and a bolt.

In this technical scheme, the axial terminal surface of propping the dish in locating first connecting portion is convenient for avoid the inner circle of extrados and annular workpiece, promotes the convenience of propping the convenience of dish installation and the convenience of annular workpiece installation in the lathe.

In the technical scheme, the first connecting part is provided with a rack, and the rack is used for being matched with a machine tool to adjust the position of the inner supporting disc.

In this technical scheme, through setting up the rack, parts such as the gear on the lathe of being convenient for, rack promote the rack, and then the position of propping the dish in the adjustment, make interior dish that props can support along radial outside motion and lean on with annular workpiece, along radial inside motion and annular workpiece separation, such simple structure props the position of dish in easily adjusting, has promoted the convenience that interior formula clamping frock used.

In any one of the above technical solutions, one end of the first connecting portion on the inner supporting disc is provided with a limiting portion protruding outward in the radial direction.

In the technical scheme, the limiting part protruding outwards in the radial direction is arranged at one end provided with the first connecting part, namely the limiting part is arranged at one end, close to the machine tool, of the inner support type clamping tool, so that the axial displacement of the annular workpiece can be limited, the inner support type clamping tool is installed on the machine tool, the annular workpiece is prevented from colliding with the machine tool due to the axial displacement when the annular workpiece rotates at a high speed after being installed on the inner support type clamping tool, and the machining safety is improved.

In any one of the above technical solutions, the number of the inner supporting discs is plural, and the plural inner supporting discs are distributed in central symmetry.

In the technical scheme, the number of the inner supporting discs is multiple, the inner supporting discs are in central symmetric distribution, the inner supporting discs are enabled to be uniformly abutted against the inner circumferential surface of the annular workpiece, the annular workpiece is enabled to be stressed uniformly, the stability of the annular workpiece during high-speed rotation is facilitated to be improved, the inner supporting discs in central symmetric distribution are abutted against the inner circumferential surface of the annular workpiece, the center hole of the annular workpiece is convenient to locate, the installation deviation of the annular workpiece is facilitated to be reduced, the annular workpiece after machining is prevented from deflecting, and the problems of dynamic balance out-of-tolerance and jumping out-of-tolerance of the annular workpiece are solved.

In above-mentioned technical scheme, internal stay formula clamping frock still includes: the fixed core assembly is provided with a second connecting part, and the second connecting part is used for being connected with a machine tool; a first fixed mandrel is arranged at one end of the fixed core assembly, which is far away from the second connecting part; the inner supporting discs are fan-shaped, and a plurality of fan-shaped inner supporting discs surround the shaft outlet hole; the first fixing mandrel is positioned in the shaft hole and used for extending into the inner ring of the annular workpiece so as to position the central hole of the annular workpiece.

In this technical scheme, through setting up the core subassembly of deciding, and decide the core subassembly and include first certain dabber, first certain dabber sets up in the shaft hole that a plurality of sectorial internal stay dish enclose closed, in the first certain dabber can pass the internal stay dish and stretch into annular work piece like this to the centre bore position of location annular work piece, such simple structure, the center of annular work piece is easily fixed a position, is favorable to further reducing the installation incline of annular work piece, avoids annular work piece dynamic balance after the processing and the unqualified of beating.

In the above technical solution, the core fixing assembly further includes: the positioning disc is sleeved outside the fixed core shaft; 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, avoids annular work piece to take place the processing deviation because of axial displacement when rotatory, can also avoid annular work piece to bump with the lathe because of axial displacement and lead to the incident.

In the above technical solution, the core fixing assembly further includes: the base, the second connecting portion locate on the base.

In the above technical solution, the core fixing assembly further includes: one end of the second fixed core shaft is arranged in the base; the other end of the second fixed core shaft is provided with an axial second groove; the positioning disc is arranged between the second fixed mandrel and the first fixed mandrel; one end of the first fixing mandrel, which is close to the second connecting part, is provided with an axial first bulge, and the diameter of the first bulge is smaller than that of the first fixing mandrel; a second bulge is arranged on the positioning plate, and a third groove is arranged at the position, corresponding to the second bulge, on the positioning plate; the positioning disc is arranged between the first fixed core shaft and the second fixed 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 fixed mandrel and the second fixed mandrel, so that the axial displacement of the positioning disc is convenient to limit, and the positioning disc is ensured to limit the mounting disc on the annular workpiece; the third recess cover on the positioning disk is located on the first arch of first fixed core epaxial, and the second arch on the positioning disk is located in the epaxial second recess of second fixed core, is favorable to restricting the radial displacement of positioning disk like this, avoids the positioning disk to take place radial offset and produces the contact with the interior circumference of annular work piece and lead to the mar.

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 plate of an inner support type clamping tool according to an embodiment of the present invention;

FIG. 2 is a schematic sectional view taken along line A-A in FIG. 1;

fig. 3 is a rear view structural diagram of an inner support plate of the inner support type clamping tool according to an embodiment of the present invention;

fig. 4 is a schematic top view of an inner support plate of the 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 taken along line D-D of FIG. 3;

fig. 8 is a front view structural diagram of a core fixing assembly of the inner supporting type clamping tool according to an embodiment of the present invention;

fig. 9 is a schematic sectional view in the direction of E-E in fig. 8.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 9 is:

the structure comprises a 10 inner supporting disc, a 100 first connecting part, a 102 outer arc surface, a 103 convex ring, a 104 first groove, a 106 threaded hole, a 108 rack, a 110 limiting part, a 20 fixed core component, a 200 second connecting part, a 202 first fixed core shaft, a 204 positioning disc, a 206 base, a 208 second fixed core shaft, a 210 first bulge and a 212 second bulge.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings, which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

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 specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Some embodiments according to the invention are described below with reference to fig. 1 to 9.

As shown in fig. 1 to 7, the internal bracing type clamping tool according to the utility model provides an embodiment for the clamping location of annular work piece on the machine tool, include: the inner supporting disc 10 is provided with a first connecting part 100, and the first connecting part 100 is used for being connected with a machine tool; the inner support disc 10 is provided with an outer arc surface 102, wherein the inner support disc 10 is used for extending into an inner ring of the annular workpiece, and the outer arc surface 102 abuts against an inner circumferential surface of the annular workpiece under the driving of a machine tool.

In some embodiments, the annular workpiece is a hub, more specifically, an engineering hub, and the engineering hub eventually requires cutting off the rear rim.

In this embodiment, the inner supporting disk 10 is used to extend into the inner ring of the annular workpiece, the outer arc surface 102 of the inner supporting disk 10 abuts against the inner circumferential surface of the annular workpiece, that is, the inner supporting disk 10 abuts against the inner circumferential surface of the annular workpiece inside the annular workpiece, and meanwhile, the inner supporting disk 10 is connected to the machine tool through the first connecting portion 100, so that the purpose of clamping the annular workpiece on the machine tool can be achieved through the friction force between the inner supporting disk 10 and the annular workpiece.

As shown in fig. 2, specifically, by the arrangement of the first connecting portion 100, the inner supporting disk 10 of the inner supporting type clamping tool can be connected to a machine tool, so that the annular workpiece can be conveniently connected with the machine tool through the inner supporting type clamping tool; the inner supporting disc 10 is provided with the outer arc surface 102, the outer arc surface 102 is abutted against the inner circumferential surface of the annular workpiece, namely the inner supporting type clamping tool is in surface contact with the annular workpiece, so that when the inner supporting type clamping tool is tensioned, the pressure on the annular workpiece is small, the annular workpiece is not easy to be clamped and damaged, and clamping marks or top marks are not easy to generate; the inner supporting disc 10 is connected with the machine tool, so that the inner supporting disc 10 can extend into the inner ring of the annular workpiece firstly 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 also be pointed out that, the mode that interior vaulting disc 10 leaned on through the inside from annular work piece carries out the clamping to annular work piece, when annular work piece is wheel hub, wheel hub's preceding rim and back rim all can directly be processed, need not be behind the rim before processing, with wheel hub pull down the processing that the clamping could carry out the back rim again, only need a clamping promptly can be to preceding rim, the back rim all carries out machining, when having saved work efficiency, the condition that wheel hub's preceding rim pressed from both sides the wound has still been avoided.

As shown in fig. 2, it can be understood that the first connecting portion 100 and the outer arc surface 102 are respectively disposed on different surfaces of the inner support disk 10, for example, the first connecting portion 100 is disposed on an end surface of the inner support disk 10, and the outer arc surface 102 is disposed on a circumferential surface of the inner support disk 10.

As shown in fig. 4 and 5, in the above embodiment, a convex ring 103 is disposed at an end of the extrados surface 102 away from the first connection portion 100, and the convex ring 103 is disposed along a circumferential direction of the extrados surface 102 and protrudes outward in a radial direction of the extrados surface 102; the outer arc surface 102 and/or the convex ring 103 are/is provided with a first groove 104, and the first groove 104 is 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, the annular workpieces with certain gradients on the inner ring can be better adapted, further, the height difference between the convex ring 103 and the outer arc surface 102 can meet the requirement of the safety of cutter feed 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 formed in the outer arc surface 102 and/or the convex ring 103, so that convex peaks and other reinforcing ribs on the inner ring of the annular workpiece can be avoided, and the situation that the outer arc surface 102 or the convex ring 103 abuts against the convex peaks and other reinforcing ribs to cause unstable clamping or damage to the convex peaks and other reinforcing ribs is avoided; in addition, the bulge loop 103 is arranged at one end of the outer arc surface 102 far away from the first connecting part 100, that is, a certain distance is formed between the bulge loop 103 and the first connecting part 100, so that the outer arc surface 102 has enough length in the axial direction to facilitate the clamping of the wheel hub, the interference between the wheel hub clamped on the outer arc surface 102 and the bulge loop 103 is avoided, the structure is compact, and the occupied space is small.

In some embodiments, the reinforcing ridges are provided on the inner circumferential surface of the hub, and the reinforcing ridges can be avoided by providing the first grooves 104 on the outer arcuate surface 102.

In any of the above embodiments, as shown in fig. 5, the first connecting portion 100 is provided on the axial end face of the inner supporting disk 10; the first attachment portion 100 includes a threaded bore 106 and the inner support disk 10 is attached to the machine tool by means of the threaded bore 106 and bolts.

In this embodiment, the first connecting portion 100 is disposed on the axial end surface of the inner support disk 10, so as to avoid the outer arc surface 102 and the inner ring of the annular workpiece, and improve the convenience of mounting the inner support disk 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 a rack 108, and the rack 108 is used for cooperating with a machine tool to adjust the position of the inner supporting disk 10.

In this embodiment, through the arrangement of the rack 108, the rack 108 is conveniently pushed by components such as a gear and a rack on a machine tool, and the position of the inner supporting disk 10 is further adjusted, so that the inner supporting disk 10 can move radially outwards to abut against an annular workpiece and move radially inwards to separate from the annular workpiece.

In any of the above embodiments, as shown in fig. 2, the end of the inner supporting disk 10 where the first connecting portion 100 is located is provided with a limiting portion 110 protruding outward in the radial direction.

In this embodiment, the limiting portion 110 protruding outward in the radial direction is arranged at the end provided with the first connecting portion 100, that is, the limiting portion 110 is arranged at the end of the inner supporting type clamping tool close to the machine tool, so that the axial displacement of the annular workpiece can be limited.

As shown in fig. 2, it is understood that the first connecting portion 100 and the limiting portion 110 may partially overlap or may be separately provided.

In any of the above embodiments, the number of the inner supporting discs 10 is multiple, and the multiple inner supporting discs 10 are distributed in central symmetry.

In this embodiment, the number of the inner supporting discs 10 is plural, and the plural inner supporting discs 10 are distributed in a central symmetrical manner, which is favorable for making the plural inner supporting discs 10 uniformly abut against the inner circumferential surface of the annular workpiece, so that the annular workpiece is uniformly stressed, and the stability of the annular workpiece during high-speed rotation is favorably improved, and the inner supporting discs 10 distributed in a central symmetrical manner abut against the inner circumferential surface of the annular workpiece, thereby facilitating the positioning of the central hole of the annular workpiece, being favorable for reducing the installation deviation of the annular workpiece, further avoiding the deviation of the machined annular workpiece, and solving the problems of dynamic balance out-of-tolerance and jumping out-of-tolerance of the annular workpiece.

As shown in fig. 8 and 9, in the above embodiment, the inner supporting type clamping tool further includes: the fixed core assembly 20 is provided with a second connecting part 200, and the second connecting part 200 is used for connecting with a machine tool; a first fixed mandrel 202 is arranged at one end of the fixed mandrel component 20 far away from the second connecting part 200; the inner supporting discs 10 are fan-shaped, and a plurality of fan-shaped inner supporting discs 10 enclose the shaft hole; the first positioning mandrel 202 is located in the shaft hole, and the first positioning mandrel 202 is used for extending into an inner ring of the annular workpiece so as to position a central hole of the annular workpiece.

Optionally, a plurality of threaded holes are provided on the second connecting portion.

In this embodiment, by providing the fixed core assembly 20, and the fixed core assembly 20 includes the first fixed core shaft 202, the first fixed core shaft 202 is disposed in the axial hole enclosed by the plurality of fan-shaped internal supporting discs 10, so that the first fixed core shaft 202 can penetrate through the internal supporting discs 10 and extend into the annular workpiece, thereby positioning the central hole of the annular workpiece.

In the above embodiment, the core fixing assembly 20 further includes: the positioning disc 204 is sleeved outside the fixed 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, by arranging the positioning disc 204, when the annular workpiece is clamped, the positioning disc 204 can abut against the mounting disc, so that the axial displacement of the annular workpiece can be limited, the processing deviation of the annular workpiece caused by the axial displacement during rotation can be avoided, and the safety accident caused by collision of the annular workpiece with a machine tool caused by the axial displacement can also be avoided.

In the above embodiment, the core fixing assembly 20 further includes: the base 206, the second connecting portion 200 is disposed on the base 206.

In the above embodiment, the core fixing assembly 20 further includes: a second fixed mandrel 208, one end of which is arranged in the base 206; the other end of the second fixed core shaft 208 is provided with an axial second groove; the positioning plate 204 is arranged between the second fixed mandrel 208 and the first fixed mandrel 202; one end of the first fixing core shaft 202 close to the second connecting part 200 is provided with an axial first bulge 210, and the diameter of the first bulge 210 is smaller than that of the first fixing core shaft 202; a second protrusion 212 is arranged on the positioning plate 204, and a third groove is arranged at a position on the positioning plate 204 corresponding to the second protrusion 212; the positioning plate 204 is disposed between the first fixed core shaft 202 and the second fixed core shaft 208, the third groove is sleeved on the first protrusion 210, and the second protrusion 212 is disposed in the second groove.

In this embodiment, the positioning disk 204 is disposed between the first fixing core shaft 202 and the second fixing core shaft 208, so as to limit the axial displacement of the positioning disk 204, the third groove on the positioning disk 204 is sleeved on the first protrusion 210, so as to limit the displacement of the positioning disk 204 towards the first fixing core shaft 202, and the second protrusion 212 is disposed in the second groove, so as to limit the displacement of the positioning disk 204 towards the second fixing core shaft, thereby ensuring that the positioning disk 204 limits the mounting disk on the annular workpiece; in addition, the third groove on the positioning plate 204 is sleeved on the first protrusion 210 on the first fixing core shaft 202, and the second protrusion 212 on the positioning plate 204 is arranged in the second groove on the second fixing core shaft 208, so that the radial displacement of the positioning plate 204 is favorably limited, and the positioning plate 204 is prevented from generating contact with the inner circumferential surface of the annular workpiece to cause scratches due to radial deviation.

According to a concrete embodiment's that this application provided internal stay formula clamping frock for wheel hub carries out the clamping of machine tooling, adopts three lamella fan-shaped internal stay dish 10, and the interior rim face of the extrados 102 contact wheel hub that adopts internal stay dish 10, interior rim surface coating performance requirement is lower, and the area of contact of anchor clamps and rim is big, and anchor clamps are little to the pressure of rim coating, and the coating is difficult to be crushed, is difficult for producing the centre gripping seal.

Internal stay formula clamping frock still is equipped with decides core subassembly 20, decides core subassembly 20 and includes first certain dabber 202 and positioning disk 204, carries out the location support to wheel hub's centre bore and mounting disc face respectively, and more easy dress is just, guarantees the clamping precision, reduces by a wide margin because of the dynamic balance overproof with beat the scrapping that the overproof caused.

The three-petal fan-shaped inner supporting disc 10 is further provided with a plurality of first grooves 104 matched with the reinforcing peaks on the inner rim of the hub, so that the inner supporting disc 10 is prevented from abutting against the reinforcing peaks.

The technical scheme of the utility model is explained in detail above in combination with the drawing, through the utility model discloses a technical scheme has avoided pressing from both sides the rim that hinders wheel hub effectively to the problem of dynamic balance out of tolerance and beat out of tolerance has been solved.

In the present application, the terms "first", "second", "third" 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 limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 invention. In this specification, the schematic representations of the terms used above 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, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an internal stay formula clamping frock for the clamping location of annular workpiece on the lathe, its characterized in that includes:

the inner supporting disc is provided with a first connecting part, and the first connecting part is used for being connected with the machine tool;

the inner supporting disc is provided with an outer cambered surface,

the inner support disc is used for extending into an inner ring of the annular workpiece, and the outer arc surface is abutted against the inner circumferential surface of the annular workpiece under the driving of the machine tool.

2. The internal-supporting clamping tool according to claim 1,

a convex ring is arranged at one end of the outer arc surface, which is far away from the first connecting part, and the convex ring is arranged along the circumferential direction of the outer arc surface and protrudes outwards along the radial direction of the outer arc surface;

the outer arc 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 arc surface.

3. The internal-support type clamping tool according to claim 1 or 2,

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 support disc is connected with the machine tool through the threaded hole and a bolt.

4. The internal-supporting clamping tool according to claim 3,

and a rack is arranged on the first connecting part and is used for being matched with the machine tool so as to adjust the position of the inner supporting disc.

5. The internal-support type clamping tool according to claim 1 or 2,

one end of the first connecting part is arranged on the inner supporting disc, and a limiting part protruding outwards in the radial direction is arranged on the inner supporting disc.

6. The internal-support type clamping tool according to claim 1 or 2,

the number of the inner supporting discs is multiple, and the inner supporting discs are distributed in a centrosymmetric manner.

7. The internal supporting type clamping tool according to claim 6, further comprising:

the fixed core assembly is provided with a second connecting part, and the second connecting part is used for being connected with the machine tool;

a first fixed mandrel is arranged at one end, far away from the second connecting part, of the fixed core assembly;

the inner supporting discs are fan-shaped, and a plurality of fan-shaped inner supporting discs surround the shaft hole;

the first fixing mandrel is positioned in the shaft hole and used for extending into the inner ring of the annular workpiece so as to position the central hole of the annular workpiece.

8. The internal-supporting clamping tool according to claim 7,

the core fixing component further comprises: the positioning disc is sleeved outside the fixed core shaft;

and an installation disc is arranged on the inner ring of the annular workpiece, and the positioning disc is used for abutting against the installation disc.

9. The internal-supporting clamping tool according to claim 8,

the core fixing component further comprises: the second connecting portion is arranged on the base.

10. The internal-supporting clamping tool according to claim 9,

the core fixing component further comprises: one end of the second fixed core shaft is arranged in the base;

the other end of the second fixed core shaft is provided with an axial second groove;

the positioning disc is arranged between the second fixed core shaft and the first fixed core shaft;

one end of the first fixing mandrel, which is close to the second connecting part, is provided with an axial first bulge, and the diameter of the first bulge is smaller than that of the first fixing mandrel;

a second bulge is arranged on the positioning plate, and a third groove is arranged at the position, corresponding to the second bulge, on the positioning plate;

the positioning disc is arranged between the first fixed core shaft and the second fixed core shaft, the third groove is sleeved on the first protrusion, and the second protrusion is arranged in the second groove.

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