CN209986250U

CN209986250U - Hollow part internal clamping fixture

Info

Publication number: CN209986250U
Application number: CN201920646260.4U
Authority: CN
Inventors: 缪海滔; 余亚飞; 郭永坚; 林翔
Original assignee: Ningde Normal University
Current assignee: Ningde Normal University
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2020-01-24
Anticipated expiration: 2029-05-07

Abstract

The utility model discloses a hollow part internal clamping anchor clamps, including fixed disk, (holding) chuck, clamping jaw unit, centering support column and top unit, the flower groove is provided with the notch more than three. The fixed disc is clamped and fixed on a main shaft of a lathe, and a hollow workpiece is sleeved on the chuck plate, so that the worm can be driven to move along the center shaft hole through the turbine handle. Then will articulate the centering support column support that is opened on fixed bulge loop through the bracing piece, the centering support column rotates round fixed notch through the promotion of bracing piece promptly, and then struts the centering support column and supports hollow class work piece, reaches the purpose of pre-fixing hollow class work piece. And then start the lathe for the (holding) chuck follows the high-speed rotation of lathe main shaft, makes the clamping jaw unit produce centrifugal force, then contacts fixedly with the inside wall of hollow class work piece, and further carries out the centre gripping to the work piece, and the axiality of hollow class part can be guaranteed to the centre gripping of multiple spot moreover, reaches the purpose that provides machining efficiency.

Description

Hollow part internal clamping fixture

Technical Field

The utility model relates to a turning attachment field especially relates to a hollow part internal clamping anchor clamps.

Background

In most conventional lathes, since the clamping of a part or a workpiece is performed by an outer clamping method, the clamped portion cannot be processed simultaneously, and thus the portion needs to be cut off or further processed repeatedly. And the machining allowance for the hollow parts is less, so that the machining process requirement is higher, and the smoothness and the coaxiality of the surface machining of the hollow parts are further met. Therefore, repeated processing needs to be reduced or avoided, and manual errors and mechanical errors of multiple clamping are eliminated. The production efficiency and the production quality are improved.

SUMMERY OF THE UTILITY MODEL

Therefore, the hollow part inner clamping fixture is needed to be provided for solving the problems that the existing hollow part is low in machining precision and high in production cost.

In order to achieve the aim, the inventor provides an internal clamping fixture for hollow parts, which comprises a fixture body, a clamping jaw unit, a centering support column and a tip unit; the fixture body is provided with a centre shaft hole, the centre unit is sleeved in the centre shaft hole, the fixture body comprises a fixed disc, a chuck plate and a connecting shaft, the connecting shaft is arranged between the fixed disc and the chuck plate, the chuck plate is provided with a flower groove and a fixed convex ring, the flower groove is positioned at the edge of the end face of the chuck plate, the fixed convex ring is positioned on the end face of the chuck plate between the centre shaft hole and the flower groove, and the central axis of the fixed convex ring is collinear with the central axis of the centre shaft hole; one end of the centering support column is hinged to the fixed convex ring, a connecting rod is hinged between the middle of the centering support column and the tip of the tip unit, a through hole is formed in the outer side surface of the connecting shaft, and the through hole is communicated with the tip shaft hole; the flower bed is provided with the notch more than three, switch on each other between notch and the notch, just the notch switches on the setting with the side of (holding) chuck mutually, clamping jaw unit sets up with the same quantity of notch, just clamping jaw unit corresponds to set up one in the notch, clamping jaw unit is used for following the (holding) chuck and rotates the centrifugal force that produces and carry out the centre gripping to hollow part.

Further, the clamping jaw unit comprises a clamping jaw and a fixing pin, the clamping jaw is arranged in a notch of the clamping chuck, a plurality of fixing holes are formed in the middle of the clamping jaw at equal intervals, and the fixing pin penetrates through the fixing holes to be arranged on the clamping chuck.

Furthermore, the end face of each clamping jaw is provided with an anti-slip pattern.

Further, the centre unit comprises a centre, a worm and a movable shaft; the movable shaft is characterized in that a tip shaft hole is formed in one end of the movable shaft, a fixing hole is formed in the other end of the movable shaft, the tip is arranged in the tip shaft hole, and the scroll rod is arranged in the fixing hole.

The novel umbrella comprises a base, a tailstock center, a supporting umbrella frame and an umbrella frame supporting ring, wherein the umbrella frame supporting ring is hinged to the base, the tailstock center is arranged in a sleeve of the base, the supporting umbrella frame is hinged between the umbrella frame supporting ring and the tailstock center, and the supporting umbrella frame is used for supporting and opening the umbrella frame supporting ring along with the movement of the tailstock center.

Furthermore, the umbrella stand support ring is provided with a plurality of supporting rods, one end of each supporting rod is provided with an arc-shaped rod, and the other end of each supporting rod is hinged to the outer side face of the sleeve of the base.

Furthermore, the umbrella supporting frame comprises a ring sleeve and a plurality of hinged rods, the hinged rods are provided with a plurality of pieces, one end of each hinged rod is arranged on the ring sleeve in a circumferential array mode, the other end of each hinged rod is arranged on the supporting rod in a hinged mode, an inner hole of the ring sleeve is a conical surface, and the ring sleeve is arranged on the tailstock center in a sleeved mode.

Furthermore, the tailstock center comprises a sliding shaft, a center and a hand wheel, the sliding shaft is sleeved in a sleeve of the base, the sliding shaft is provided with a central through hole, one end of the central through hole is provided with a morse taper hole, the other end of the central through hole is provided with a threaded hole, the hand wheel is provided with a threaded rod, the threaded rod is perpendicular to the end face of the hand wheel, the rod end of the threaded rod penetrates through the bottom face of the sleeve of the base and is arranged on the threaded hole, and the center is arranged in the morse taper hole.

The lathe center is characterized in that the lathe center is provided with a center shaft hole, a center shaft hole is formed in the center shaft hole, the center shaft hole is formed in the center shaft hole, and the center shaft hole is formed in the center shaft hole. The mode of adopting the umbrella of opening will articulate the centering support column support on fixed bulge loop through the bracing piece and open, and the promotion that the centering support column passes through the bracing piece promptly rotates round fixed notch, and then props open the centering support column and support hollow class work piece, reaches the purpose of pre-fixing hollow class work piece. And then start the lathe for the (holding) chuck follows the high-speed rotation of lathe main shaft, makes the clamping jaw unit produce centrifugal force, then contacts fixedly with the inside wall of hollow class work piece, and further carries out the centre gripping to the work piece, and the axiality of hollow class part can be guaranteed to the centre gripping of multiple spot moreover, reaches the purpose that provides machining efficiency.

Drawings

FIG. 1 is a schematic view of an embodiment of an internal hollow part clamping fixture;

FIG. 2 is a partial schematic view of an embodiment of a hollow part internal clamping fixture;

FIG. 3 is a partial cross-sectional view of a hollow part internal clamping fixture according to an embodiment;

FIG. 4 is a front view of a chuck of an internal hollow part clamping fixture according to an embodiment;

FIG. 5 is a schematic diagram of a hollow part clamping fixture for holding a hollow part according to an embodiment;

FIG. 6 is a view of the structure of the tail seat of the umbrella frame of the internal clamping fixture for hollow parts according to the embodiment;

FIG. 7 is a cross-sectional view of the tail stock of the umbrella frame of the internal clamping fixture for hollow parts according to the embodiment.

Description of reference numerals:

1. a hollow part;

10. fixing the disc;

20. a chuck; 21. a flower trough; 211. a notch; 22. fixing the convex ring; 221. a fixed notch;

30. a jaw unit;

31. a claw; 311. a fixing hole; 312. anti-skid lines;

32. fixing the pin;

40. centering the supporting column;

50. a tip unit; 51. a scroll bar; 52. a movable shaft; 53. a live center;

60. a connecting shaft; 61. a through hole;

70. a centre shaft hole;

80. a tail seat of the umbrella stand;

81. a base;

82. a tailstock center; 821. a slide shaft; 822. a tip; 823. a hand wheel;

8211. a central through hole; 8212. a threaded rod; 8213. a threaded hole;

83. supporting the umbrella stand; 831. sleeving a ring; 832. a hinged lever;

84. an umbrella stand support ring; 841. a support bar; 8411. an arcuate bar;

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

Referring to fig. 1 to 7, the present embodiment provides an internal clamping fixture for a hollow part, as shown in fig. 2, including a fixing plate 10, a chuck 20, a clamping jaw unit 30, a centering support column 40 and a tip unit 50, wherein the inner hole diameter of the hollow part at least needs to be greater than 60mm, the centering support column in the present embodiment can clamp a part with an inner hole diameter of the hollow part 1 being between 100mm and 220mm, and the hollow part with an inner hole diameter greater than 220mm can be clamped by changing the size of the centering support column. A connecting shaft 60 is arranged between the fixed disc and the chuck, the end surface of the chuck is provided with a flower groove 21 and a fixed convex ring 22, and the circumferential array of the end surface of the fixed convex ring is provided with more than four fixed notches 221.

As shown in fig. 2 and 3, in this embodiment, the fixed disk is used for connecting with a spindle of a lathe, a slot is formed in an end surface of the fixed disk, a side lug is arranged on an outer side surface of the fixed disk, a wire sleeves the fixed disk on the spindle of the lathe through the slot, and then the fixed disk is locked on the spindle of the lathe by penetrating through the side lug by using a bolt, so that the effect of installing and fixing the fixed disk is achieved. Because the fixed convex rings on the fixed disk, the connecting shaft, the chuck and the chuck are sequentially connected, and the fixed convex rings on the fixed disk, the connecting shaft, the chuck and the chuck are positioned on the same central axis, and a tip shaft hole 70 penetrating through the whole two end faces of the center axis is formed along the central axis. And put into the centre unit in the centre shaft hole to and be fixed in the scroll 51 of centre unit afterbody, set up through-hole 61 on the lateral wall of connecting axle, this through-hole communicates with the centre shaft hole, and the quantity of through-hole can be a plurality of, consequently, use through the through-hole and have the turbine handle, can make the removal of centre unit in the centre shaft hole with the mode that adopts the turbine scroll, the turbine handle for have with the handle of the turbine of scroll intermeshing of scroll, for example, a axostylus axostyle is fixed on a hand wheel, and a turbine is fixed in the rod end installation of this axostylus axostyle, and then reach the mesh through turbine handle drive scroll.

The other end of the centre unit is hinged with a supporting rod through a bolt or a pin, the centering supporting column is hinged with the fixed convex ring through a bolt or a pin, and the other end of the supporting rod is hinged with the middle part of the centering supporting column. When the top unit moves towards the outside of the top shaft hole, the supporting rod drives and supports the centering supporting column, so that the centering supporting column rotates around the hinge point and expands outwards until the inner side wall of the hollow part is supported. Because the centering support column has more than three, can carry out the pre-support to fixed to hollow class part. In this embodiment, four centering support columns are taken as an example, the four centering support columns can simultaneously expand and support the hollow part, and the four centering support columns have an automatic centering effect, so that the coaxiality of the part during machining can be ensured, the outer side surface of the part can be machined at one time, and the machining times are reduced. And can be the ironware of axostylus axostyle class to centering support column to the cushion of an arcwall face is installed on the rod end of axostylus axostyle, makes area of contact increase between centering support column and the medial surface of hollow part, improves the steadiness that its supported.

Specifically, as shown in fig. 3, the center unit includes a movable shaft 52 and a movable center 53, the movable shaft is used for sliding in the center shaft hole, so as to effectively reduce the sliding friction force of the center unit in the center shaft hole, and simultaneously, the movable center is also used for connecting the movable center and the scroll bar. One end face of the movable shaft is provided with a center shaft hole for placing a movable center, and the movable center can be matched with a tailstock of a lathe to be used for centering and fixing semi-hollow workpieces. For example, for a solid workpiece, end face slots may be formed at both ends of the solid workpiece, so that the chuck may be placed in the slots for supporting and fixing, and meanwhile, centering is performed through the movable center and the tailstock, thereby achieving the purpose of integrally processing the outer side face of the workpiece.

As shown in fig. 4, the end face of the chuck in this embodiment is provided with a flower groove structure, that is, the end face of the chuck is provided with more than three notches 211, which are communicated with each other and with the side face of the chuck, so that the centrifugal rotation range of the jaw unit is limited by the side wall of the notch, and the condition that the centrifugal force is too large to scratch the part or damage the jaw unit is avoided. In the present embodiment, three jaw units are provided, and three notches are provided, and since the jaw units include the jaws 31 and the fixing pins 32, one jaw is fixedly installed in each notch by the fixing pin. The jaws are also provided with a plurality of fixing holes 311, so that different fixing holes for fixing the pins can lead the jaws to extend out of the outer side surface of the chuck in different lengths, and the maximum diameters of the hollow parts fixed by the jaws can be adjusted to be different. Simultaneously, in order to improve the clamping-force of clamping jaw, set up anti-skidding line 312 on the terminal surface of clamping jaw, this anti-skidding line can be reticulation or insection for the clamping jaw frictional force when the centre gripping increases, makes the clamping jaw centre gripping more stable, improves the practicality of the interior clamping jig of hollow part.

As shown in fig. 6 and 7, the present embodiment further comprises a tailstock 80 of the umbrella frame, which comprises a base 81, a tailstock centre 82, a support umbrella frame 83 and an umbrella frame support ring 84. For the middle-long hollow part, the length of the middle-long hollow part is 1-3 meters, and when the middle-long hollow part cannot be stably clamped only through the clamping jaw unit and the centering support column on the chuck, the clamping stability of the middle-long hollow part is ensured and improved by matching with the clamping of the tail seat of the umbrella stand. Specifically, on a slide rail of a lathe arranged on a base of the umbrella stand tailstock, the center line axis of a sleeve of the base is adjusted to be collinear with the center line axis of a movable center of a center unit, so that coaxiality when the hollow part is clamped is achieved. The tailstock center comprises a sliding shaft 821, a center 822 and a hand wheel 823, the sliding shaft is provided with a central through hole 8211, one end of the central through hole is provided with a Morse taper hole 8212, and the other end of the central through hole is provided with a threaded hole 8213. In the sleeve was located to the smooth axle sleeve, because the smooth degree of surface between smooth axle and the sleeve is high and can effectual its frictional force that reduces behind the machine oil to be convenient for telescopic removal, this principle and structure are prior art, and are not the problem that this application file will solve, consequently do not carry out detailed repeated. Fixed a threaded rod 8231 on the hand wheel for the threaded rod can follow the hand wheel and rotate, and with the rotatable fixing of this threaded rod on the sleeve bottom surface of base, and threaded rod and the screw hole 8111 intermeshing of sliding shaft, in order to avoid the threaded rod to break away from the screw hole, can be at a separation blade of the rod end fixed mounting of threaded rod, and the length of side or the diameter of separation blade is greater than the screw hole diameter, and the separation blade is the sheetmetal, for example the iron sheet. Therefore, when the sliding shaft is meshed with the threaded rod through the threaded hole, the sliding shaft can slide in the sleeve through rotation of the hand wheel, and then the position of the tip in the sliding shaft mode taper hole is adjusted.

In the embodiment, the sleeve of the base is hinged with the umbrella stand support ring through the bolt or the pin, and the support umbrella stand is also hinged between the tip and the umbrella stand support ring through the bolt or the pin, so that when the support umbrella stand moves along with the tip, the umbrella stand support ring can be stretched and opened to be fixed. Specifically, the umbrella stand support ring has many spinal branchs pole 841, three in this embodiment, at one of bracing piece one end fixed mounting arc pole 8411, the radian of this arc pole can be the circular arc at 100 degrees angles, consequently through the articulated installation of circumference array this three bracing piece on the sleeve lateral surface of base for the arc pole encircles and becomes a holding surface that has a disc, the maximum diameter when opening of this holding surface is the same with centering support column. In order to drive the supporting umbrella stand to rotate, a ring sleeve 831 is sleeved on the top, and a hinge rod 832 is hinged between the ring sleeve and the supporting rods through bolts, so that the ring sleeve is driven to move through the movement of the top, and the three supporting rods are supported and opened through the hinge rod, and the purpose of supporting hollow parts is achieved.

And when the umbrella stand support ring needs to be adjusted, repaired or changed, overhaul through taking off top and ring cover, dismantle the articulated bolt of umbrella stand support ring again and can change, the tailstock top can also use as current tailstock this moment, and then improves the practicality and the adaptability of the interior centre gripping anchor clamps of hollow part.

It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications of the embodiments described herein, or the equivalent structure or equivalent process changes made by the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the scope of the present invention.

Claims

1. The utility model provides a hollow part internal clamping anchor clamps which characterized in that: the clamp comprises a clamp body, a clamping jaw unit, a centering support column and a tip unit;

the fixture body is provided with a centre shaft hole, the centre unit is sleeved in the centre shaft hole, the fixture body comprises a fixed disc, a chuck plate and a connecting shaft, the connecting shaft is arranged between the fixed disc and the chuck plate, the chuck plate is provided with a flower groove and a fixed convex ring, the flower groove is positioned at the edge of the end face of the chuck plate, the fixed convex ring is positioned on the end face of the chuck plate between the centre shaft hole and the flower groove, and the central axis of the fixed convex ring is collinear with the central axis of the centre shaft hole;

a plurality of fixing notches are formed in the end face of the fixing convex ring at equal intervals, a plurality of centering support columns are arranged, one end of one centering support column is hinged to one fixing notch, a connecting rod is hinged between the middle of the centering support column and the tip of the tip unit, a through hole is formed in the outer side face of the connecting shaft, and the through hole is communicated with the tip shaft hole;

the flower bed is provided with the notch more than three, switch on each other between notch and the notch, just the notch switches on the setting with the side of (holding) chuck mutually, clamping jaw unit sets up with the same quantity of notch, just clamping jaw unit corresponds to set up one in the notch, clamping jaw unit is used for following the (holding) chuck and rotates the centrifugal force that produces and carry out the centre gripping to hollow part.

2. A hollow part internal holding jig according to claim 1, wherein: the clamping jaw unit comprises a clamping jaw and a fixing pin, the clamping jaw is arranged in a notch of the chuck, a plurality of fixing holes are formed in the middle of the clamping jaw at equal intervals, and the fixing pin penetrates through the fixing holes to be arranged on the chuck.

3. A hollow part internal holding jig according to claim 2, wherein: the end face of each clamping jaw is provided with an anti-slip pattern.

4. A hollow part internal holding jig according to claim 1, wherein: the centre unit comprises a centre, a worm and a movable shaft;

the movable shaft is characterized in that a tip shaft hole is formed in one end of the movable shaft, a fixing hole is formed in the other end of the movable shaft, the tip is arranged in the tip shaft hole, and the scroll rod is arranged in the fixing hole.

5. A hollow part internal holding jig according to claim 1, wherein: the novel umbrella frame is characterized by further comprising an umbrella frame tailstock, wherein the umbrella frame tailstock comprises a base, a tailstock center, a supporting umbrella frame and an umbrella frame supporting ring, the umbrella frame supporting ring is hinged to the base, the tailstock center is arranged in a sleeve of the base, the supporting umbrella frame is hinged to the position between the umbrella frame supporting ring and the tailstock center, and the supporting umbrella frame is used for supporting and opening the umbrella frame supporting ring along with the movement of the tailstock center.

6. The hollow part internal holding jig according to claim 5, wherein: the umbrella stand support ring is provided with a plurality of supporting rods, one end of each supporting rod is provided with an arc-shaped rod, and the other end of each supporting rod is hinged to the outer side face of the sleeve of the base.

7. The hollow part internal holding jig according to claim 6, wherein: the supporting umbrella frame comprises a ring sleeve and a plurality of hinged rods, the hinged rods are provided with a plurality of ends, one end of each hinged rod is arranged on the ring sleeve in a circumferential array mode, the other end of each hinged rod is arranged on the supporting rod in a hinged mode, an inner hole of the ring sleeve is a conical surface, and the ring sleeve is arranged on the tailstock center in a sleeved mode.

8. The hollow part internal holding jig according to claim 5, wherein: the tailstock center comprises a sliding shaft, a center and a hand wheel, the sliding shaft is sleeved in a sleeve of the base, the sliding shaft is provided with a central through hole, one end of the central through hole is provided with a Morse taper hole, the other end of the central through hole is provided with a threaded hole, the hand wheel is provided with a threaded rod, the threaded rod is perpendicular to the end face of the hand wheel, the rod end of the threaded rod penetrates through the bottom face of the sleeve of the base and is arranged on the threaded hole, and the center is arranged in the Morse taper hole.