CN113770404A - Lathe internal expanding clamp - Google Patents
Lathe internal expanding clamp Download PDFInfo
- Publication number
- CN113770404A CN113770404A CN202111183216.2A CN202111183216A CN113770404A CN 113770404 A CN113770404 A CN 113770404A CN 202111183216 A CN202111183216 A CN 202111183216A CN 113770404 A CN113770404 A CN 113770404A
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- tensioning
- mandrel
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- tension
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- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 4
- 230000009471 action Effects 0.000 claims description 8
- 239000007779 soft material Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polytetrafluoroethylene rings Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/16158—Jaws movement actuated by coaxial conical surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
- B23B31/16158—Jaws movement actuated by coaxial conical surfaces
- B23B31/16179—Jaws movement actuated by coaxial conical surfaces using fluid-pressure means to actuate the gripping means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a lathe internal tensioning clamp which comprises a clamping base, an installation frame, a tensioning block, a tensioning mandrel and a tensioning driving mechanism, wherein the clamping base is provided with a clamping hole; the mounting frame comprises a connecting flange and a fixing ring, a plurality of connecting plates are arranged between the connecting flange and the fixing ring, a tensioning block base is arranged between two adjacent connecting plates, and the outer side of each tensioning block base is provided with one tensioning block; the tensioning mandrel is conical, and the small-diameter end of the tensioning mandrel extends into the conical hole from the large-diameter end of the conical hole; an end cover is arranged at one end, far away from the clamping base, of the mounting frame, and the tensioning driving mechanism is located between the end cover and the tensioning mandrel. The invention effectively solves the problem of clamping deformation of the ultrathin annular part made of soft materials.
Description
Technical Field
The invention relates to the field of lathe positioning fixtures, in particular to an internal tensioning fixture for an ultrathin annular part.
Background
At present, a three-jaw chuck is generally adopted for clamping when parts are machined on a lathe, but when soft and ultrathin annular parts (such as polytetrafluoroethylene rings, copper rings and the like) are clamped by the three-jaw chuck, the parts are seriously deformed, so that the machined parts cannot meet the requirements.
In the traditional internal tensioning mechanism, the tensioning sleeve is integrated, and the tensioning mandrel is axially fed during working, pushes the tensioning sleeve to elastically expand outwards through the matched conical surface, and tensions a part. When the tension sleeve elastically expands outwards, the expansion conditions of all sections in the axial direction are different, the expansion from the near end of the mandrel is larger, and the tension force is large; the far end has small expansion and small tension force, and the radial tension force borne by the part is uneven; for a flexible material and an ultrathin annular component, the influence of a component having a high accuracy requirement is large.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an internal tensioning clamp of a lathe, which can enable the clamping force applied to each radial part of an annular part to be uniform and consistent, prevent clamping deformation, be suitable for processing soft and ultrathin annular parts and improve the processing precision of the parts.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows: a lathe internal tensioning clamp is characterized by comprising a clamping base, an installation frame, a tensioning block, a tensioning mandrel and a tensioning driving mechanism;
the mounting frame comprises a connecting flange and a fixing ring which are arranged with the same axial lead, the connecting flange is fixedly connected with the clamping base, a plurality of connecting plates are arranged between the connecting flange and the fixing ring, the connecting plates are uniformly distributed around the fixing ring for a circle, and two ends of the connecting plates are fixedly connected with the connecting flange and the fixing ring; a tensioning block base is arranged between two adjacent connecting plates, is connected with the connecting flange plate, the fixing ring and the connecting plates in a sliding fit manner and can move along the radial direction of the connecting flange plate; the inner side surface of each tensioning block base is an inclined surface, the section of each tensioning block base is arc-shaped, two ends of each tensioning block base are respectively provided with an arc-shaped groove, the arc-shaped grooves at the same end of each tensioning block base are positioned on the same circumference, two ends of each tensioning block base are respectively connected through a pre-tightening elastic piece, the pre-tightening elastic pieces are positioned in the arc-shaped grooves, and in an initial state, under the action of the pre-tightening elastic pieces, the tensioning block bases are mutually closed, so that tapered holes are formed in the inner side of the tensioning block bases, and small-diameter sections of the tapered holes are close to the connecting flange; the outer side of each tensioning block base is provided with one tensioning block, and each tensioning block is fixedly connected with the tensioning block base through a connecting bolt and can move along with the tensioning block; the cross section of each tensioning block is arc-shaped, and the outer side surface of each tensioning block is positioned on the same cylindrical surface which is superposed with the axial lead of the connecting flange plate;
the tensioning mandrel is conical, the conical degree of the tensioning mandrel is consistent with that of a conical hole formed in the inner side of the tensioning block base, and the small-diameter end of the tensioning mandrel extends into the conical hole from the large-diameter end of the conical hole; the end, far away from the clamping base, of the mounting frame is provided with an end cover, the end cover is fixedly connected with the fixing ring, the tension driving mechanism is located between the end cover and the tension mandrel and is respectively connected with the end cover and the tension mandrel, the tension mandrel can be driven to move axially through the tension driving mechanism, and when the tension mandrel moves towards the clamping base, the tension driving mechanism can extrude the tension block base, so that the tension block base is pushed to move outwards along the radial direction, and the tension block is driven to move outwards along the radial direction.
In the scheme, the inner hole formed by the tensioning block base in a whole is a tapered hole, the tensioning mandrel is tapered corresponding to the tapered hole, and when the tensioning mandrel moves under the action of the tensioning driving mechanism, the tensioning block base can be pushed to move outwards along the radial direction, so that the tensioning block is driven to move outwards along the radial direction synchronously, the annular part sleeved on the tensioning block is tensioned radially, and the radial force applied to the annular part by each tensioning block is uniform, so that the problem of clamping deformation of the soft material and the ultrathin annular part is solved effectively.
Furthermore, the pre-tightening elastic part adopts an annular spring or an elastic rubber ring; simple structure, low cost, stability is better.
Preferably, the tensioning driving mechanism adopts a pneumatic device and comprises a cylinder body, a piston and a piston rod, the cylinder body is fixedly connected with the end cover, one end of the cylinder body, which is close to the end cover, is provided with an air tap, and the air tap penetrates through the cylinder cover; the piston is located in the cylinder body and connected with the cylinder body in a sliding fit mode, one end of the piston rod is connected with the piston, and the other end of the piston rod penetrates through the cylinder body and then is connected with the large-diameter end of the tensioning mandrel. The tensioning mandrel is pushed to move through the pneumatic device, and control is facilitated.
Furthermore, one end of the piston rod, which extends out of the cylinder body, is fixedly connected with a power block, and the power block is connected with a connecting block through a screw; and a tensioning screw rod is arranged at the small diameter end of the tensioning mandrel, penetrates through the tensioning mandrel and then is connected with the connecting block, and the connecting block is tightly attached to the tensioning mandrel. Therefore, when the tension mandrel is pushed, the contact area is larger, the action effect is better, and when the tension mandrel is reset, gas in the cylinder body can be exhausted more quickly.
Furthermore, a containing groove is formed in the large-diameter end of the tensioning mandrel, corresponding to the position of the cylinder body, the connecting block and the power block are located in the containing groove, and one end, far away from the end cover, of the cylinder body extends into the containing groove and is connected with the containing groove in a sliding fit mode. Therefore, the whole clamp is more compact in structure and smaller in size.
Furthermore, a reset spring is arranged between the small-diameter end of the tensioning mandrel and the clamping base, and two ends of the reset spring are respectively connected with the tensioning mandrel and the clamping base. After the return spring is arranged, the mandrel can be reset more quickly, so that the annular part can be taken out and mounted more conveniently.
Furthermore, still be equipped with a gas vent on the clamping base to guarantee that the tight dabber that rises removes more smoothly, avoid causing the tight dabber that rises to remove to be obstructed because of unable exhaust.
Furthermore, a guide shaft is arranged at the small-diameter end of the tensioning mandrel along the axial direction of the tensioning mandrel, a guide groove is formed in the clamping base corresponding to the guide shaft, one end of the guide shaft is fixedly connected with the tensioning mandrel, and the other end of the guide shaft extends into the guide groove and is connected with the guide groove in a sliding fit mode. Through setting up the guiding axle to can ensure the stability of tight dabber removal in-process that rises, thereby further guarantee the tight dabber that rises and remove stability and the uniformity of in-process application of force to tight piece base and tight piece that rises.
Furthermore, the large-diameter end of the tensioning block base is also provided with an arc-shaped limiting groove, a limiting ring is arranged on the end cover corresponding to the limiting groove, one end of the limiting ring is fixedly connected with the end cover, the other end of the limiting ring extends into the limiting groove, and the radial width of the limiting groove is larger than the thickness of the limiting ring. Therefore, the situation that the tensioning block base is separated from the mounting frame due to the fact that the pre-tightening elastic piece is suddenly damaged in the extrusion process of the tensioning mandrel on the tensioning block base is avoided.
Preferably, the tension driving mechanism adopts a linear motor, the linear motor is fixedly connected with the end cover, and a motor shaft of the linear motor is connected with the tension mandrel; the structure is simpler, and the control accuracy is higher.
Compared with the prior art, the invention has the following advantages:
(1) the tensioning mandrel is pushed to axially feed through the tensioning driving mechanism, the tensioning mandrel pushes the tensioning block base and the tensioning block to radially and outwardly move, the tensioning block is enabled to radially feed, each tensioning block is enabled to synchronously and outwardly move, a contact surface formed by the outer side surface of each tensioning block is attached to the inner side surface of the annular part, and when the annular part is tensioned, radial clamping force borne by the annular part is uniformly distributed, so that the problem of clamping deformation of soft materials and ultrathin annular parts can be effectively solved, the positioning precision of the annular part is effectively improved, and the processing precision of the annular part is greatly improved.
(2) When the clamp is used, the tensioning blocks with different sizes are selected and replaced according to the annular parts with different inner diameters, so that the applicability of the whole clamp is enhanced; meanwhile, before the part is clamped, the outer surface (namely the clamping surface) of the tensioning block can be finely repaired, so that the whole clamp has higher positioning precision.
Drawings
FIG. 1 is a schematic structural view of an internal expanding fixture of a lathe according to the present invention;
fig. 2 is a cross-sectional view of fig. 1.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Fig. 4 is a schematic structural view of the mounting bracket.
Fig. 5 is a schematic view of an assembly structure of the tensioning block and the tensioning block base.
Fig. 6 is a schematic view of an assembly structure of the tension mandrel and the starting device.
The clamping device comprises a clamping base 1, a tensioning block 2, a tensioning mandrel 3, a connecting flange plate 4, a fixing ring 5, a connecting plate 6, a tensioning base 7, a pre-tightening elastic part 8, an end cover 9, a cylinder body 10, a piston 11, a piston rod 12, an air nozzle 13, a power block 14, a connecting block 15, a tensioning screw 16, a reset spring 17, an exhaust hole 18, a guide shaft 19, a limiting groove 20, a limiting ring 21 and an annular part 22.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments.
Example 1: referring to fig. 1-6, an internal tensioning clamp for a lathe includes a clamping base 1, an installation frame, a tensioning block 2, a tensioning mandrel 3, and a tensioning driving mechanism.
The mounting frame comprises a connecting flange plate 4 and a fixing ring 5 which are arranged coaxially, and the inner hole diameters of the connecting flange plate 4 and the fixing ring 5 are consistent during processing; the connecting flange plate 4 is fixedly connected with the clamping base 1, a plurality of connecting plates 6 are arranged between the connecting flange plate 4 and the fixing ring 5, the connecting plates 6 are uniformly distributed around the fixing ring 5 for a circle, two ends of the connecting plates are fixedly connected with the connecting flange plate 4 and the fixing ring 5, and the axial lead of the fixing ring 5 is crossed on the plane where the connecting plates 6 are located. And a tensioning block base 7 is arranged between every two adjacent connecting plates 6, the number of the connecting plates 6 is preferably 8, and correspondingly, the number of the tensioning block bases 7 is also 8, so that the annular part 22 can be better tensioned and clamped. The tensioning block base 7 is connected with the connecting flange plate 4, the fixing ring 5 and the connecting plate 6 in a sliding fit mode and can move along the radial direction of the connecting flange plate 4. The inner side surface of the tensioning block base 7 is an inclined surface, and the section of the inner side surface is arc-shaped; two ends of each tensioning block base 7 are respectively provided with an arc-shaped groove, the arc-shaped grooves at the same end of the tensioning block base 7 are positioned on the same circumference, and two ends of each tensioning block base 7 are respectively connected through a pre-tightening elastic piece 8; the pre-tightening elastic piece 8 is located in the arc-shaped groove, and under the action of the pre-tightening elastic piece 8 in an initial state, the tensioning block bases 7 are close to each other, so that a tapered hole is formed in the inner side of the whole tensioning block base 7, and the small-diameter section of the tapered hole is close to the connecting flange plate 4. When the device is implemented, the pre-tightening elastic piece 8 adopts an annular spring or an elastic rubber ring; simple structure, low cost, stability is better.
The outer side of each tensioning block base 7 is provided with one tensioning block 2, and each tensioning block 2 is fixedly connected with the tensioning block base 7 through a connecting bolt and can move along with the tensioning block 2; the cross section of each tensioning block 2 is arc-shaped, and the outer side surface of each tensioning block 2 is positioned on the same cylindrical surface which is superposed with the axial lead of the connecting flange plate 4. In the actual manufacturing process, a clamping groove is formed in the outer side surface of the tensioning block base 7, a convex block is arranged on the inner side of the tensioning block 2 corresponding to the clamping groove, the convex block is clamped with the clamping groove and locked and fixed through a connecting bolt, so that the tensioning block 2 is convenient to disassemble and assemble, the tensioning blocks 2 with different sizes are selected and replaced according to the annular parts 22 with different inner diameters, and the applicability of the whole clamp is enhanced; meanwhile, before the part is clamped, the outer surface (namely the clamping surface) of the tensioning block 2 can be finely repaired, so that the whole clamp has higher positioning precision.
The tensioning mandrel 3 is conical, the taper of the tensioning mandrel is consistent with that of a conical hole formed in the inner side of the tensioning block base 7, and the small-diameter end of the tensioning mandrel 3 extends into the conical hole from the large-diameter end of the conical hole. An end cover 9 is arranged at one end of the mounting frame, which is far away from the clamping base 1, the end cover 9 is fixedly connected with the fixing ring 5, the tension driving mechanism is positioned between the end cover 9 and the tension mandrel 3 and is respectively connected with the end cover 9 and the tension mandrel 3, and the tension driving mechanism can drive the tension mandrel 3 to move along the axial direction of the tension mandrel 3. When the tensioning mandrel 3 moves towards the clamping base 1, the tensioning block base 7 can be extruded, so that the tensioning block base 7 is pushed to move outwards along the radial direction, and the tensioning block 2 is driven to move outwards along the radial direction. Wherein, still be equipped with a gas vent 18 on clamping base 1 to guarantee that the tight dabber 3 that rises removes more smoothly, avoid causing tight dabber 3 to remove because of unable exhaust to be obstructed. When the tensioning device is used, a return spring 17 is arranged between the small-diameter end of the tensioning mandrel 3 and the clamping base 1, and two ends of the return spring 17 are respectively connected with the tensioning mandrel 3 and the clamping base 1; after the return spring 17 is arranged, the mandrel can be reset more quickly, so that the annular part 22 can be taken out and mounted more conveniently; in the working process, when the tensioning mandrel 3 moves towards the clamping base 1, the return spring 17 is in a compressed state; after the parts are machined, the tensioning mandrel 3 returns rapidly under the reaction force of the return spring 17, so that the parts can be unloaded rapidly.
During specific implementation, the tensioning driving mechanism adopts a pneumatic device and comprises a cylinder body 10, a piston 11 and a piston rod 12, the cylinder body 10 is fixedly connected with an end cover 9, an air tap 13 is arranged at one end, close to the end cover 9, of the cylinder body 10, and the air tap 13 penetrates through a cylinder cover. The piston 11 is positioned in the cylinder block 10 and is connected with the cylinder block 10 in a sliding fit manner, one end of the piston rod 12 is connected with the piston 11, and the other end of the piston rod penetrates through the cylinder block 10 and then is connected with the large-diameter end of the tensioning mandrel 3; the tensioning mandrel 3 is pushed to move through a pneumatic device, so that the control is more convenient. Wherein, one end of the piston rod 12 extending out of the cylinder body 10 is fixedly connected with a power block 14, and the power block 14 is connected with a connecting block 15 through a screw; a tensioning screw 16 is arranged at the small diameter end of the tensioning mandrel 3, the tensioning screw 16 passes through the tensioning mandrel 3 and then is connected with the connecting block 15, and the connecting block 15 is tightly attached to the tensioning mandrel 3. Therefore, when the tensioning mandrel 3 is pushed, the contact area is larger, the action effect is better, and when the tensioning mandrel 3 is reset, the gas in the cylinder body 10 can be exhausted more quickly. The large-diameter end of the tensioning mandrel 3 is provided with a containing groove corresponding to the position of the cylinder block 10, the connecting block 15 and the power block 14 are both positioned in the containing groove, and one end of the cylinder block 10, which is far away from the end cover 9, extends into the containing groove and is connected with the containing groove in a sliding fit manner. Therefore, the whole clamp is more compact in structure and smaller in size.
A guide shaft 19 is arranged at the small-diameter end of the tensioning mandrel 3 along the axial direction, a guide groove is arranged on the clamping base 1 corresponding to the guide shaft 19, one end of the guide shaft 19 is fixedly connected with the tensioning mandrel 3, and the other end of the guide shaft extends into the guide groove and is connected with the guide groove in a sliding fit manner. Through setting up guiding axle 19 to can ensure the stability of the tight dabber 3 removal in-process that rises, thereby further guarantee the tight dabber 3 removal in-process stability and the uniformity to the tight piece base 7 that rises and the tight piece 2 application of force that rises. Wherein the exhaust hole 18 communicates with the guide groove.
The large-diameter end of the tensioning block base 7 is further provided with an arc-shaped limiting groove 20, a limiting ring 21 is arranged on the end cover 9 corresponding to the limiting groove 20, one end of the limiting ring 21 is fixedly connected with the end cover 9, the other end of the limiting ring extends into the limiting groove 20, and the radial width of the limiting groove 20 is larger than the thickness of the limiting ring 21. Thereby avoiding the situation that the tensioning block base 7 is separated from the mounting frame under the condition that the pre-tightening elastic piece 8 is suddenly damaged in the extrusion process of the tensioning mandrel 3 on the tensioning block base 7.
When the clamp is used, the clamping base 1 is clamped on a lathe spindle through a three-jaw chuck and rotates along with the spindle, gas is filled into the cylinder body 10 through the gas nozzle 13, the piston 11 and the piston rod 12 are pushed to axially feed, and therefore the tensioning mandrel 3 is pushed to axially feed. The tensioning block base 7 and the tensioning block 2 are radially fed under the action of the radial component force of the matched conical surfaces of the tensioning mandrel 3 and the tensioning block base 7, each tensioning block 2 synchronously moves outwards and is tensioned, a contact surface formed on the outer surface of each tensioning block 2 can be completely attached to the inner side surface of the annular part 22, and the radial force exerted by each tensioning block 2 on the annular part 22 is uniform and consistent when the annular part 22 is tensioned, and the radial tensioning force exerted on the part is uniformly distributed; and the adjustment of the clamping force of the parts is realized by adjusting the pressure of the filled gas. After the annular part 22 is machined, pressure gas is quickly released through the air nozzle 13, and the tensioning mandrel 3 returns under the reaction of the return spring 17, so that the part is quickly unloaded, and the part is conveniently detached and replaced.
In the scheme, because the inner hole formed by the tensioning block base 7 is a tapered hole, the tensioning mandrel 3 is tapered corresponding to the tapered hole, and when the tensioning mandrel 3 moves under the action of the tensioning driving mechanism, the tensioning block base 7 can be pushed to move outwards along the radial direction, so that the tensioning block 2 is driven to move outwards along the radial direction synchronously, and therefore the annular part 22 sleeved on the tensioning block 2 is tensioned radially, and the radial force applied to the annular part 22 by each tensioning block 2 is uniform, so that the problem of clamping deformation of the soft material and the ultrathin annular part 22 is solved effectively.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all that should be covered by the claims of the present invention.
Claims (10)
1. A lathe internal tensioning clamp is characterized by comprising a clamping base, an installation frame, a tensioning block, a tensioning mandrel and a tensioning driving mechanism;
the mounting frame comprises a connecting flange and a fixing ring which are arranged with the same axial lead, the connecting flange is fixedly connected with the clamping base, a plurality of connecting plates are arranged between the connecting flange and the fixing ring, the connecting plates are uniformly distributed around the fixing ring for a circle, and two ends of the connecting plates are fixedly connected with the connecting flange and the fixing ring; a tensioning block base is arranged between two adjacent connecting plates, is connected with the connecting flange plate, the fixing ring and the connecting plates in a sliding fit manner and can move along the radial direction of the connecting flange plate; the inner side surface of each tensioning block base is an inclined surface, the section of each tensioning block base is arc-shaped, two ends of each tensioning block base are respectively provided with an arc-shaped groove, the arc-shaped grooves at the same end of each tensioning block base are positioned on the same circumference, two ends of each tensioning block base are respectively connected through a pre-tightening elastic piece, the pre-tightening elastic pieces are positioned in the arc-shaped grooves, and in an initial state, under the action of the pre-tightening elastic pieces, the tensioning block bases are mutually closed, so that tapered holes are formed in the inner side of the tensioning block bases, and small-diameter sections of the tapered holes are close to the connecting flange; the outer side of each tensioning block base is provided with one tensioning block, and each tensioning block is fixedly connected with the tensioning block base through a connecting bolt and can move along with the tensioning block; the cross section of each tensioning block is arc-shaped, and the outer side surface of each tensioning block is positioned on the same cylindrical surface which is superposed with the axial lead of the connecting flange plate;
the tensioning mandrel is conical, the conical degree of the tensioning mandrel is consistent with that of a conical hole formed in the inner side of the tensioning block base, and the small-diameter end of the tensioning mandrel extends into the conical hole from the large-diameter end of the conical hole; the end, far away from the clamping base, of the mounting frame is provided with an end cover, the end cover is fixedly connected with the fixing ring, the tension driving mechanism is located between the end cover and the tension mandrel and is respectively connected with the end cover and the tension mandrel, the tension mandrel can be driven to move axially through the tension driving mechanism, and when the tension mandrel moves towards the clamping base, the tension driving mechanism can extrude the tension block base, so that the tension block base is pushed to move outwards along the radial direction, and the tension block is driven to move outwards along the radial direction.
2. The lathe internal tensioning clamp according to claim 1, wherein: the pre-tightening elastic part adopts an annular spring or an elastic rubber ring.
3. The lathe internal tensioning clamp according to claim 1, wherein: the tensioning driving mechanism adopts a pneumatic device and comprises a cylinder body, a piston and a piston rod, the cylinder body is fixedly connected with an end cover, and one end of the cylinder body, which is close to the end cover, is provided with an air tap which penetrates through a cylinder cover; the piston is located in the cylinder body and connected with the cylinder body in a sliding fit mode, one end of the piston rod is connected with the piston, and the other end of the piston rod penetrates through the cylinder body and then is connected with the large-diameter end of the tensioning mandrel.
4. The lathe internal tensioning clamp according to claim 3, wherein: one end of the piston rod, which extends out of the cylinder body, is fixedly connected with a power block, and the power block is connected with a connecting block through a screw; and a tensioning screw rod is arranged at the small diameter end of the tensioning mandrel, penetrates through the tensioning mandrel and then is connected with the connecting block, and the connecting block is tightly attached to the tensioning mandrel.
5. The lathe internal tensioning clamp according to claim 4, wherein: the large-diameter end of the tensioning mandrel is provided with a containing groove corresponding to the position of the cylinder body, the connecting block and the power block are both positioned in the containing groove, and one end, far away from the end cover, of the cylinder body extends into the containing groove and is connected with the containing groove in a sliding fit manner.
6. The lathe internal tensioning clamp according to claim 1, wherein: and a reset spring is also arranged between the small-diameter end of the tensioning mandrel and the clamping base, and two ends of the reset spring are respectively connected with the tensioning mandrel and the clamping base.
7. The lathe internal tensioning clamp according to claim 1, wherein: and the clamping base is also provided with an exhaust hole.
8. The lathe internal tensioning clamp according to claim 1, wherein: the small-diameter end of the tensioning mandrel is provided with a guide shaft along the axial direction, a guide groove is formed in the clamping base and corresponds to the guide shaft, one end of the guide shaft is fixedly connected with the tensioning mandrel, and the other end of the guide shaft extends into the guide groove and is connected with the guide groove in a sliding fit mode.
9. The lathe internal tensioning clamp according to claim 1, wherein: the large-diameter end of the tensioning block base is also provided with an arc-shaped limiting groove, a limiting ring is arranged on the end cover corresponding to the limiting groove, one end of the limiting ring is fixedly connected with the end cover, the other end of the limiting ring extends into the limiting groove, and the radial width of the limiting groove is larger than the thickness of the limiting ring.
10. The lathe internal tensioning clamp according to claim 1, wherein: the tension driving mechanism adopts a linear motor, the linear motor is fixedly connected with the end cover, and a motor shaft of the linear motor is connected with the tension mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111183216.2A CN113770404B (en) | 2021-10-11 | 2021-10-11 | Internal tensioning clamp of lathe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111183216.2A CN113770404B (en) | 2021-10-11 | 2021-10-11 | Internal tensioning clamp of lathe |
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| Publication Number | Publication Date |
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| CN113770404A true CN113770404A (en) | 2021-12-10 |
| CN113770404B CN113770404B (en) | 2024-03-29 |
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| CN202111183216.2A Active CN113770404B (en) | 2021-10-11 | 2021-10-11 | Internal tensioning clamp of lathe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346937A (en) * | 2021-12-27 | 2022-04-15 | 日善电脑配件(嘉善)有限公司 | Clamping mechanism and clamping method |
| CN114505645A (en) * | 2022-04-20 | 2022-05-17 | 杭州泰尚智能装备有限公司 | Positioning clamping slewing mechanism for welding and operation method thereof |
| CN117961592A (en) * | 2024-03-29 | 2024-05-03 | 山西昊坤法兰股份有限公司 | Jacking clamp for cutting off flange lock ring |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB491699A (en) * | 1938-01-22 | 1938-09-07 | James Edward Connor | Improvements in chucks |
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| CN215698093U (en) * | 2021-10-11 | 2022-02-01 | 重庆华渝电气集团有限公司 | Internal expanding clamp for lathe |
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| GB491699A (en) * | 1938-01-22 | 1938-09-07 | James Edward Connor | Improvements in chucks |
| DE1477655A1 (en) * | 1963-04-19 | 1969-06-04 | Pittler Ag Maschf | Method for clamping hollow workpieces, in particular thin-walled rings, on a lathe and device for carrying out the method |
| CN203900531U (en) * | 2014-04-23 | 2014-10-29 | 河北宣化工程机械股份有限公司 | Lathe fixture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114346937A (en) * | 2021-12-27 | 2022-04-15 | 日善电脑配件(嘉善)有限公司 | Clamping mechanism and clamping method |
| CN114346937B (en) * | 2021-12-27 | 2024-02-27 | 日善电脑配件(嘉善)有限公司 | Clamping mechanism and clamping method |
| CN114505645A (en) * | 2022-04-20 | 2022-05-17 | 杭州泰尚智能装备有限公司 | Positioning clamping slewing mechanism for welding and operation method thereof |
| CN114505645B (en) * | 2022-04-20 | 2022-07-26 | 杭州泰尚智能装备有限公司 | Positioning clamping slewing mechanism for welding and operation method thereof |
| CN117961592A (en) * | 2024-03-29 | 2024-05-03 | 山西昊坤法兰股份有限公司 | Jacking clamp for cutting off flange lock ring |
| CN117961592B (en) * | 2024-03-29 | 2024-06-04 | 山西昊坤法兰股份有限公司 | Jacking clamp for cutting off flange lock ring |
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| CN113770404B (en) | 2024-03-29 |
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