CN219598123U - Internal expansion type clamp for blind hole aluminum piston lathe - Google Patents
Internal expansion type clamp for blind hole aluminum piston lathe Download PDFInfo
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- CN219598123U CN219598123U CN202321226945.6U CN202321226945U CN219598123U CN 219598123 U CN219598123 U CN 219598123U CN 202321226945 U CN202321226945 U CN 202321226945U CN 219598123 U CN219598123 U CN 219598123U
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- inner expansion
- hole
- pull rod
- expansion
- clamp base
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model relates to the technical field of lathe clamps, in particular to an internal expansion clamp for a blind hole aluminum piston lathe, which comprises a main shaft, a clamp base, an internal expansion sleeve, a pull rod and an internal expansion head, wherein the main shaft is arranged on the main shaft; the center of the main shaft is axially provided with a pull rod through hole; the clamp base is fixedly connected with the main shaft, and an axial through hole is formed in the center of the clamp base; the inner expansion sleeve is fixedly connected with the clamp base; the center of the inner expansion sleeve is axially provided with an inner expansion through hole; the end of the inner expansion through hole far away from the clamp base is in a necking shape; the pull rod through hole, the axial through hole and the internal expansion through hole are sequentially communicated; the pull rod is axially movably connected in the pull rod through hole; one end of the inner expansion head is fixedly connected with the pull rod; when the inner expansion sleeve is expanded, the other end of the inner expansion head penetrates through the axial through hole to extend into the inner expansion through hole and is propped against the necking part of the inner expansion through hole to expand the inner expansion sleeve. The utility model has the advantages that the clamp is changed from a back-pull type to a front-push type, and the risk of damage to the inner hole of the aluminum piston is avoided and the quality cost is reduced by changing the structures of the inner expansion head and the inner expansion sleeve.
Description
Technical Field
The utility model relates to the technical field of lathe clamps, in particular to an internal expansion clamp for a blind hole aluminum piston lathe.
Background
In the existing lathe fixture, as the aluminum piston has higher requirements on the outer diameter dimensional precision and the surface quality, clamping and positioning are required to be carried out in a mode of expanding the aperture in the turning process, so that the outer diameter of the piston is prevented from being scratched, and the quality loss is reduced. The existing internal expansion type clamps are mostly rear-pulling type, so that the head of the clamping type pull rod is protruded to easily cause damage to the inner hole and the hole bottom.
Disclosure of Invention
The utility model aims to solve the technical problem that the prior internal pulling type clamp is easy to cause damage to an inner hole and a hole bottom, and provides the internal expanding sleeve which is changed from a back pulling type to a front pushing type through the forward movement of the internal expanding head, thereby achieving the purpose of clamping, avoiding the contact between the internal expanding head and the inner hole of a processed aluminum piston, and solving the risk of collision damage.
The utility model aims at realizing the following technical scheme:
an internal expansion type clamp for a blind hole aluminum piston lathe comprises a main shaft, a clamp base, an internal expansion sleeve, a pull rod and an internal expansion head; the center of the main shaft is axially provided with a pull rod through hole; the clamp base is fixedly connected with the main shaft, and an axial through hole is formed in the center of the clamp base; the inner expansion sleeve is fixedly connected with the clamp base; the center of the inner expansion sleeve is axially provided with an inner expansion through hole; the end, far away from the clamp base, of the inner expansion through hole is in a necking shape; the pull rod through hole, the axial through hole and the internal expansion through hole are coaxially arranged and are sequentially communicated; the pull rod is axially movably connected in the pull rod through hole; one end of the inner expansion head is fixedly connected with the pull rod; when the inner expansion sleeve is expanded, the other end of the inner expansion head penetrates through the axial through hole to extend into the inner expansion through hole and is propped against the necking part of the inner expansion through hole to expand the inner expansion sleeve. The clamp is changed from a back-pull type to a front-push type, and the pull rod drives the inner expansion head to axially move by changing the structures of the inner expansion head and the inner expansion sleeve, so that when the inner expansion head advances, the inner expansion head contacts with the inner expansion sleeve inner hole, and the inner expansion head pushes the inner expansion sleeve to expand the inner expansion sleeve to achieve the purpose of clamping the aluminum piston, thereby solving the problem of contact between the inner expansion head and the inner hole of the aluminum piston, avoiding the risk of damage to the inner hole of the aluminum piston and reducing the quality cost.
Preferably, the inner expansion sleeve comprises an inner expansion connecting part and a rod sleeve part; the inner expansion connecting part is fixedly connected with the clamp base; the outer peripheral wall of one end of the rod sleeve part far away from the clamp base is provided with a plurality of inner expansion penetrating grooves penetrating through the outer peripheral wall in a circumferential arrangement mode, and each inner expansion penetrating groove is axially arranged. Through the internal expansion through groove on the rod sleeve part, the internal expansion sleeve can be conveniently expanded, and simultaneously the elasticity is increased to facilitate the recovery of the pull rod and the internal expansion sleeve
Preferably, the number of the inner expansion penetrating grooves is six, and the included angle between any two adjacent inner expansion penetrating grooves is 60 degrees. The inner expansion sleeve can be uniformly expanded through the six inner expansion through grooves, and the expansion effect and the rebound effect are improved.
Preferably, the clamp base is provided with a step surface; the step surface is circumferentially provided with a plurality of step screw holes, and the step screw holes are connected to the inside of the step screw holes through step connecting screw threads, so that the inner expansion connecting part is fixedly connected with the clamp base. The inner expansion connecting part is convenient to limit through the step surface, and meanwhile, the inner expansion connecting part is convenient to fix through the step connecting screw.
Preferably, the inner expansion head comprises a connecting part and a push rod part; a threaded hole is formed in one end, close to the inner expansion sleeve, of the pull rod; one end of the connecting part is in threaded connection with the threaded hole, and the ejector rod part is fixedly connected with the center of the connecting part. The connecting part is convenient for connecting and fixing, and the ejector rod part is convenient for expanding the inner expanding sleeve.
Preferably, an end surface inclined towards the center is arranged at one end of the ejector rod part away from the pull rod; the end face is matched with the necking part of the inner expansion through hole. The end face is convenient to be matched with the necking part, so that the ejector rod part can be well connected and transited with the internal expansion through hole when being jacked up, and the smoothness and stability of expansion are improved.
Preferably, the connecting portion and the ejector portion are integrally formed, and the diameter of the ejector portion is smaller than the diameter of the connecting portion. The integrated forming is convenient to produce, meanwhile, the connection strength is improved, and the inner expansion sleeve is convenient to better jack through the thinner ejector rod part.
Preferably, the clamp base is provided with a connecting concave surface; the main shaft is provided with a connecting boss matched and connected with the connecting concave surface; a plurality of boss screw holes are circumferentially formed in the connecting boss, and the connecting boss penetrates through the clamp base through a boss connecting screw to be connected into the boss screw holes in a threaded mode, so that the clamp base is fixedly connected with the spindle. The clamp base is convenient to position and locate better through the connecting boss and the connecting concave surface, and meanwhile, the clamp base is convenient to fixedly connect through the boss connecting screw.
Preferably, the device further comprises an aluminum piston, wherein the aluminum piston is sleeved on the outer peripheral wall of the inner expansion sleeve.
In summary, the utility model has the advantages that the internal expansion type clamp is changed from a back-pull type to a front-push type, and the internal expansion head is limited not to be protruded by utilizing the front angle of the internal expansion sleeve by changing the structures of the internal expansion head and the internal expansion sleeve, thereby solving the problem that the internal expansion head is contacted with the inner hole of the aluminum piston, avoiding the risk of inner hole damage and reducing the quality cost.
Drawings
Fig. 1 is a schematic structural view of an internal expansion clamp for a lathe of a blind hole aluminum piston.
Fig. 2 is an exploded view of the blind hole aluminum piston lathe internal expansion clamp of the present utility model.
Fig. 3 is a schematic structural view of the inner tension sleeve in the present utility model.
Fig. 4 is a cross-sectional view of the blind hole aluminum piston lathe inner expansion clamp of the present utility model.
Wherein: 1. a main shaft; 11. a pull rod through hole; 12. a connecting boss; 13. boss screw holes; 14. the boss is connected with a screw; 2. a clamp base; 21. an axial through hole; 22. a connecting concave surface; 23. a step surface; 24. a step screw hole; 25. step connecting screws; 3. an inner expansion sleeve; 301. an inner expansion connecting part; 302. a rod sleeve portion; 30. an internal expansion through groove; 31. an inner expansion through hole; 311. a necking part; 4. a pull rod; 5. an inner expansion head; 50. an end face; 51. a connection part; 52. a push rod part; 6. an aluminum piston.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
As shown in fig. 1 to 4, an internal expansion clamp for a blind hole aluminum piston lathe comprises a main shaft 1, a clamp base 2, an internal expansion sleeve 3, a pull rod 4, an internal expansion head 5 and an aluminum piston 6; the center of the main shaft 1 is axially provided with a pull rod through hole 11; the fixture base 2 is made of FDAC die steel imported from Japan, the fixture base 2 is fixedly connected with the main shaft 1, and an axial through hole 21 is formed in the center of the fixture base 2; the inner expansion sleeve 3 is made of 65Mn spring steel through heat treatment until the hardness is 40HRC, and the inner expansion sleeve 3 is fixedly connected with the clamp base 2; the center of the inner expansion sleeve 3 is axially provided with an inner expansion through hole 31; the end (right end) of the inner expansion through hole 31 far away from the clamp base 2 is in a necking shape; the pull rod through hole 11, the axial through hole 21 and the internal expansion through hole 31 are coaxially arranged and are sequentially communicated; the pull rod 4 is axially movably connected in the pull rod through hole 11; the left end of the inner expansion head 5 is fixedly connected with the pull rod 4; when the inner expansion sleeve is expanded, the right end of the inner expansion head 5 passes through the axial through hole 21 and extends into the inner expansion through hole 31, and abuts against the shrinkage part 311 of the inner expansion through hole 31 to expand the inner expansion sleeve 3; the aluminum piston 6 is sleeved on the outer peripheral wall of the inner expansion sleeve 3. The clamp is changed from a back-pull type to a front-push type, and the structure of the inner expansion head 5 and the inner expansion sleeve 3 is changed, so that the pull rod 4 drives the inner expansion head 5 to axially move, when the inner expansion head 5 advances, the inner expansion head 5 contacts with the inner hole of the inner expansion sleeve 3, and the inner expansion head 5 pushes the inner expansion sleeve 3 to expand the inner expansion sleeve 3 to achieve the purpose of clamping the aluminum piston 6, thereby solving the problem of contact between the inner expansion head 5 and the inner hole of the aluminum piston 6, avoiding the risk of damage to the inner hole of the aluminum piston 6, and reducing the quality cost.
As shown in fig. 1 to 4, the inner tension sleeve 3 includes an inner tension connection portion 301 and a rod sleeve portion 302; the inner expansion connecting part 301 is fixedly connected with the clamp base 2; the rod sleeve portion 302 is provided with a plurality of inner expansion through grooves 30 penetrating the outer peripheral wall in a circumferential direction on the outer peripheral wall of one end (right end) of the clamp base 2, and each inner expansion through groove 30 is provided in an axial direction. The inner expansion through grooves 30 on the rod sleeve part 302 can facilitate the expansion of the inner expansion sleeve 3, and the elasticity is increased to facilitate the recovery of the pull rod 4, so that the number of the inner expansion through grooves 30 of the inner expansion sleeve 3 is six, and the included angle between any two adjacent inner expansion through grooves 30 is 60 degrees. The inner expansion sleeve 3 can be uniformly expanded through the six inner expansion through grooves 30, and the expansion effect and the rebound effect are improved. The end of the sleeve portion 302 is 0.2mm larger than the inner bore of the aluminum piston 6. The clamp base 2 is provided with a step surface 23; three step screw holes 24 are circumferentially arranged on the step surface 23, the three hole positions are circumferentially distributed at equal intervals, and the three hole positions are connected into the step screw holes 24 through step connecting screws 25 in a threaded mode, so that the inner expansion connecting portion 301 is fixedly connected with the clamp base 2. The inner expansion connecting part 301 is conveniently and better limited by the step surface 23, and simultaneously, the inner expansion connecting part is conveniently fixed by the step connecting screw 25.
As shown in fig. 1 to 4, the inner expansion head 5 is made of 20Cr alloy steel and is heat treated to have a hardness of 40HRC, and the inner expansion head 5 comprises a connecting part 51 and a push rod part 52; a threaded hole is formed in one end (right end) of the pull rod 4, which is close to the inner expansion sleeve 3; the left end of the connecting portion 51 is screwed into the screw hole, and the ejector rod portion 52 is fixedly connected to the center of the connecting portion 51. The connecting part 51 facilitates connection and fixation, and the ejector rod part 52 facilitates expansion of the inner expansion sleeve 3. The end (right end) of the ejector rod portion 52 remote from the pull rod 4 is provided with an end face 50 inclined toward the center; the end surface 50 is matched with the constriction 311 of the inner expansion through hole 31. The end face 50 is convenient to be matched with the necking part 311, so that the ejector rod part 52 can be well connected and transited with the inner expansion through hole 31 when being jacked up, and the smoothness and stability of expansion are improved. The connection portion 51 and the ejector pin portion 52 are integrally formed, and the diameter of the ejector pin portion 52 is smaller than the diameter of the connection portion 51. The connection strength is improved simultaneously through the integrated into one piece convenience production, and the internal expanding sleeve 3 is better jacked up through the thinner ejector pin part 52 of being convenient for.
As shown in fig. 1 to 4, the clamp base 2 is provided with a concave connection surface 22; the main shaft 1 is provided with a connecting boss 12 which is matched and connected with the connecting concave surface 22; a plurality of boss screw holes 13 are circumferentially arranged on the connecting boss 12, and the connecting boss screw 14 penetrates through the clamp base 2 to be connected into the boss screw holes 13 in a threaded manner, so that the clamp base 2 is fixedly connected with the spindle 1. The clamp base 2 is conveniently limited and positioned through the connecting boss 12 and the connecting concave surface 22, and meanwhile, the clamp base is conveniently and fixedly connected through the boss connecting screw 14.
During clamping, after the inner expansion sleeve 3, the clamp base 2 and the equipment are fixed, an external turning tool is used for turning the outer diameter of the right end of the inner expansion head 5 to be in clearance fit with an inner hole of the aluminum piston 6 so as to ensure concentricity of parts; when the pull rod 4 moves to drive the inner expansion head 5 to move left and right and the inner expansion head 5 moves rightwards, the end face 50 of the inner expansion head 5 contacts with the necking part 311 of the inner expansion through hole 31 of the inner expansion sleeve 3, the outer diameter of the right end of the inner expansion sleeve 3 is expanded from the inner expansion through groove 30 of the inner expansion sleeve 3, and then the aluminum piston 6 is clamped and fixed.
When the pull rod 4 moves leftwards during loosening, the pull rod 4 drives the inner expansion head 5 to move leftwards, the inner expansion penetrating groove 30 of the inner expansion sleeve 3 is retracted elastically by itself, and the aluminum piston 6 is in a loosening state.
In summary, the utility model has the advantages that the clamp is changed from a back-pull type to a front-push type, the structure of the inner expansion head 5 and the inner expansion sleeve 3 is changed, so that the pull rod 4 drives the inner expansion head 5 to axially move, when the inner expansion head 5 advances, the inner expansion head 5 contacts with the inner hole of the inner expansion sleeve 3, and the inner expansion head 5 pushes the inner expansion sleeve 3 to expand the inner expansion sleeve 3 to achieve the purpose of clamping the aluminum piston 6, thereby solving the problem that the inner expansion head 5 contacts with the inner hole of the aluminum piston 6, avoiding the risk of damaging the inner hole of the aluminum piston 6, and reducing the quality cost.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.
Claims (9)
1. The internal expansion type clamp for the lathe of the blind hole aluminum piston is characterized by comprising a main shaft (1), a clamp base (2), an internal expansion sleeve (3), a pull rod (4) and an internal expansion head (5); a pull rod through hole (11) is axially formed in the center of the main shaft (1); the fixture base (2) is fixedly connected with the main shaft (1), and an axial through hole (21) is formed in the center of the fixture base (2); the inner expansion sleeve (3) is fixedly connected with the clamp base (2); an inner expansion through hole (31) is axially arranged at the center of the inner expansion sleeve (3) in a shaft direction; one end of the inner expansion through hole (31) far away from the clamp base (2) is in a necking shape; the pull rod through hole (11), the axial through hole (21) and the internal expansion through hole (31) are coaxially arranged and are sequentially communicated; the pull rod (4) is axially movably connected in the pull rod through hole (11); one end of the inner expansion head (5) is fixedly connected with the pull rod (4); when the inner expansion sleeve is expanded, the other end of the inner expansion head (5) penetrates through the axial through hole (21) to extend into the inner expansion through hole (31) and abuts against the necking part (311) of the inner expansion through hole (31) to expand the inner expansion sleeve (3).
2. The internal expanding fixture for a lathe of a blind hole aluminum piston according to claim 1, wherein,
the inner expansion sleeve (3) comprises an inner expansion connecting part (301) and a rod sleeve part (302); the inner expansion connecting part (301) is fixedly connected with the clamp base (2); a plurality of inner expansion penetrating grooves (30) penetrating through the outer peripheral wall are circumferentially arranged on the outer peripheral wall of one end, far away from the clamp base (2), of the rod sleeve part (302), and each inner expansion penetrating groove (30) is axially arranged.
3. The internal expanding fixture for a lathe of a blind hole aluminum piston according to claim 2, wherein,
the number of the inner expansion through grooves (30) is six, and the included angle between any two adjacent inner expansion through grooves (30) is 60 degrees.
4. The internal expanding fixture for a lathe of a blind hole aluminum piston according to claim 2, wherein,
a step surface (23) is arranged on the clamp base (2); a plurality of step screw holes (24) are circumferentially formed in the step surface (23), and step connecting screws (25) penetrate through the inner expansion connecting portions (301) to be connected into the step screw holes (24) in a threaded mode, so that the inner expansion connecting portions (301) are fixedly connected with the clamp base (2).
5. The internal expanding fixture for a lathe of a blind hole aluminum piston according to claim 1, wherein,
the inner expansion head (5) comprises a connecting part (51) and a push rod part (52); a threaded hole is formed in one end, close to the inner expansion sleeve (3), of the pull rod (4); one end of the connecting part (51) is in threaded connection with the threaded hole, and the ejector rod part (52) is fixedly connected with the center of the connecting part (51).
6. The internal expanding fixture for a lathe of a blind hole aluminum piston according to claim 5, wherein,
an end face (50) inclined towards the center is arranged at one end of the ejector rod part (52) away from the pull rod (4);
the end face (50) is matched with a necking part (311) of the inner expansion through hole (31).
7. The internal expanding fixture for a lathe of a blind hole aluminum piston according to claim 5, wherein,
the connecting part (51) and the ejector rod part (52) are integrally formed, and the diameter of the ejector rod part (52) is smaller than that of the connecting part (51).
8. The internal expanding fixture for a lathe of a blind hole aluminum piston according to claim 1, wherein,
a connecting concave surface (22) is arranged on the clamp base (2); a connecting boss (12) matched and connected with the connecting concave surface (22) is arranged on the main shaft (1); a plurality of boss screw holes (13) are circumferentially formed in the connecting boss (12), and the connecting boss screw (14) penetrates through the clamp base (2) to be connected into the boss screw holes (13) in a threaded mode, so that the clamp base (2) is fixedly connected with the main shaft (1).
9. The internal expanding fixture for a lathe of a blind hole aluminum piston according to claim 1, wherein,
the hydraulic oil pump further comprises an aluminum piston (6), wherein the aluminum piston (6) is sleeved on the outer peripheral wall of the inner expansion sleeve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321226945.6U CN219598123U (en) | 2023-05-17 | 2023-05-17 | Internal expansion type clamp for blind hole aluminum piston lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321226945.6U CN219598123U (en) | 2023-05-17 | 2023-05-17 | Internal expansion type clamp for blind hole aluminum piston lathe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219598123U true CN219598123U (en) | 2023-08-29 |
Family
ID=87742824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321226945.6U Active CN219598123U (en) | 2023-05-17 | 2023-05-17 | Internal expansion type clamp for blind hole aluminum piston lathe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219598123U (en) |
-
2023
- 2023-05-17 CN CN202321226945.6U patent/CN219598123U/en active Active
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