CN109604657B - Hollow body clamp - Google Patents
Hollow body clamp Download PDFInfo
- Publication number
- CN109604657B CN109604657B CN201910027730.3A CN201910027730A CN109604657B CN 109604657 B CN109604657 B CN 109604657B CN 201910027730 A CN201910027730 A CN 201910027730A CN 109604657 B CN109604657 B CN 109604657B
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- China
- Prior art keywords
- hollow body
- clamping
- bearing
- mounting portion
- hollow
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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
- B23B31/103—Retention by pivotal elements, e.g. catches, pawls
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
- Connection Of Plates (AREA)
Abstract
The invention discloses a hollow body clamp which comprises a clamping mechanism and a positioning mechanism, wherein the clamping mechanism is used for clamping and fixing a first end of a hollow body; the positioning mechanism comprises a top column and a body, one end of the body is used for being rotatably connected with a lathe thimble, the other end of the body is rotatably connected with the top column, and the top column is used for tightly pushing the second end of the hollow body. The hollow body fixture provided by the invention realizes clamping and fixing of the hollow body in the turning process by arranging the clamping mechanism, and ensures the stability of the hollow body in the processing process; and through setting up the positioning mechanism who includes body and fore-set, guaranteed the uniformity of hollow body both ends rotation state, avoid the hollow body to take place buckling deformation, promoted hollow body lathe work's quality.
Description
Technical Field
The invention relates to the technical field of hollow body manufacturing, in particular to a hollow body clamp.
Background
Plastic hollow bodies are generally used in engine oil tanks, which after blow moulding have an insufficient finish of the end surfaces and of the head, since these surfaces are both sealing surfaces which cooperate with the sealing ring, if the finish is poor. After the sealing ring is assembled, the assembly body can leak, which causes quality problems. Therefore, in the prior art, after the blow molding of the hollow body is completed, the surfaces of the two ends of the hollow body and the end surfaces of the end heads need to be turned to ensure the smoothness of the surfaces matched with the sealing rings to meet the assembly requirements.
In the prior art, the hollow body is directly arranged on a lathe for machining, so that the hollow body is often subjected to buckling deformation, and the hollow body is large in diameter and length, so that large shaking is easily generated in the turning process, and the end face turning precision is poor.
Disclosure of Invention
The invention aims to provide a hollow body clamp, which is used for solving the problems in the prior art, avoiding the hollow body from shaking in the turning process, preventing the hollow body from deforming and improving the processing precision.
The invention provides a hollow body jig, comprising:
a clamping mechanism for clamping and fixing the first end of the hollow body;
the positioning mechanism comprises a top column and a body, one end of the body is used for being rotatably connected with a lathe thimble, the other end of the body is rotatably connected with the top column, and the top column is used for tightly pushing the second end of the hollow body.
The hollow body jig as defined above, wherein preferably, the clamping mechanism includes a plurality of jaws which are uniformly distributed in a circumferential direction with a distance maintained between two adjacent jaws.
The hollow body jig as described above, wherein it is preferable that the clamping jaw includes a mounting portion and a clamping portion, one end of the clamping portion is fixedly connected to the mounting portion, and the other end of the clamping portion extends in a direction away from the mounting portion;
a fixing space for fixing the hollow body is formed among the clamping parts;
the mounting portion is provided with arc-shaped portions, and positioning holes used for penetrating end heads on the hollow bodies are formed among the arc-shaped portions.
The hollow body jig as described above, wherein it is preferable that the thickness of the clamping portion is tapered in a direction away from the mounting portion.
The hollow body jig as described above, wherein it is preferable that the clamping portion is inclined at a set angle in a direction in which the hollow body is present.
The hollow body jig as described above, wherein preferably, the mounting portion is provided with a fixing hole for passing a bolt therethrough, and the mounting portion is mounted to the lathe dog by fitting the fixing hole and the bolt.
The hollow body fixture as defined in the above, preferably, the positioning mechanism further includes a first bearing, the first end of the body is provided with a first engaging groove, the first bearing is fixedly disposed in the first engaging groove, and the top pillar is rotatably connected to the body through the first bearing.
The hollow body fixture as described above, wherein preferably, the positioning mechanism further includes a second bearing, the second end of the body is provided with a second slot and an avoiding hole, the avoiding hole is communicated with the second slot, the second bearing is fixedly disposed in the second slot, and the body is rotatably connected with the lathe thimble through the second bearing.
The hollow body jig as described above, wherein preferably, the top pillar includes a guide section and a positioning section, the diameter of the guide section is smaller than the diameter of the positioning section, and a chamfer is provided at a connection point of the guide section and the positioning section.
The hollow jig as described above, wherein the body is preferably a cylindrical structure made of rubber.
The hollow body fixture provided by the invention realizes clamping and fixing of the hollow body in the turning process by arranging the clamping mechanism, and ensures the stability of the hollow body in the processing process; and through setting up the positioning mechanism who includes body and fore-set, guaranteed the uniformity of hollow body both ends rotation state, avoid the hollow body to take place buckling deformation, promoted hollow body lathe work's quality.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a state view of a hollow body jig provided in an embodiment of the present invention during operation;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a view of the clamping mechanism mounted to the jaws of a lathe;
FIG. 4 is a schematic structural view of the positioning mechanism;
fig. 5 is a cross-sectional view of the positioning mechanism.
Description of reference numerals:
100-clamping mechanism 110-mounting portion 120-clamping portion
111-arc part 112-fixing hole 200-positioning mechanism
210-top pillar 211-guide section 212-positioning section
213-chamfer 220-body 221-avoiding hole
230-first bearing 240-second bearing 300-hollow body
310-end 400-lathe claw 500-lathe thimble
600-turning tool α -angle
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
Referring to fig. 1 to 5, an embodiment of the present invention provides a hollow body fixture, which includes a clamping mechanism 100 and a positioning mechanism 200, wherein the clamping mechanism 100 is used for clamping and fixing a first end of a hollow body 300; the positioning mechanism 200 comprises a top column 210 and a body 220, wherein one end of the body 220 is used for being rotatably connected with a lathe thimble 500, the other end of the body 220 is rotatably connected with the top column 210, and the top column 210 is used for tightly supporting the second end of the hollow body 300.
Before the hollow body 300 needs to be turned, the first end of the hollow body 300 can be fixedly clamped through the clamping mechanism 100, and meanwhile, the clamping mechanism 100 is fixed to the lathe jaw 400, so that the hollow body 300 is driven to rotate through the lathe jaw 400; the top pillar 210 of the positioning mechanism 200 may be pressed against the end 310 of the second end of the hollow body 300, and then the lathe thimble 500 is rotatably connected to an end of the body 220 away from the top pillar 210, so as to provide an axial pressing force to the hollow body 300 through the lathe thimble 500, thereby preventing the hollow body 300 from moving axially during the turning process. After the lathe is started, for the first end of the hollow body 300, because the clamping mechanism 100 is fixedly connected with the lathe jaws 400, the jaws are driven by the lathe to rotate, and simultaneously, the clamping mechanism 100 can be driven to synchronously rotate, so as to drive the hollow body 300 to synchronously rotate, and the turning tool 600 is used for cutting the end surface of the second end of the hollow body 300.
For the second end of the hollow body 300, in the prior art, the lathe thimble 500 is usually directly pressed against the tip 310 of the hollow body 300 to provide an axial force, but when the lathe thimble 500 is directly pressed against the tip 310, a large frictional resistance is generated on the tip 310, when the hollow body 300 rotates, the tip 310 and the lathe thimble 500 are easily damaged due to long-term friction, and an additional torsional force is generated on the hollow body 300, thereby causing buckling deformation of the hollow body 300. Therefore, in the embodiment, the positioning mechanism 200 is provided, and two ends of the body 220 in the positioning mechanism 200 are respectively rotatably connected with the top column 210 and the lathe thimble 500, so that while the axial stability of the hollow body 300 is ensured, the torsional force between the hollow body 300 and the body 220 or the thimble can be eliminated through the rotating relationship between the body 220 and the top column 210 and the lathe thimble 500, thereby ensuring the rotation synchronism of the two ends of the hollow body 300, avoiding the hollow body 300 from generating buckling deformation during the rotation process, and ensuring the turning quality of the hollow body 300.
As shown in fig. 3, the clamping mechanism 100 may include a plurality of clamping jaws, which are uniformly distributed in the circumferential direction and keep a distance between two adjacent clamping jaws. During the process of mounting the hollow body 300 to the jaws, the hollow body 300 can be pressed into the jaws by a suitable external force, and the jaws can achieve the clamping and clamping of the hollow body 300 by slight deformation of the jaws themselves. Wherein, by maintaining a distance between two adjacent jaws, slight deformation of the jaws upon snapping-in of the hollow body 300 can be facilitated.
Specifically, the clamping jaw may include a mounting portion 110 and a clamping portion 120, one end of the clamping portion 120 is fixedly connected to the mounting portion 110, and the other end of the clamping portion 120 extends in a direction away from the mounting portion 110; a fixing space for fixing the hollow body 300 is formed between the plurality of clamping parts 120; the mounting portion 110 is provided with arc portions 111, and positioning holes for inserting the ends 310 of the hollow body 300 are formed among the arc portions 111. Therefore, the end of the hollow body 300 can be fixedly clamped into the fixing space, and the end of the hollow body 300 can be abutted against the mounting part 110, so that axial resistance can be provided for the hollow body 300 through the mounting part 110, and the stability of the hollow body 300 in the axial direction can be ensured, meanwhile, the head 310 on the hollow body 300 can be arranged in the positioning hole in a penetrating manner, wherein the arc-shaped part 111 can be abutted against the side surface of the head 310, so that the shaking of the hollow body 300 in the radial direction can be limited through the arc-shaped part 111, and the stability of the hollow body 300 in the turning process can be ensured.
Further, as shown in fig. 3, the thickness of the clamping portion 120 is gradually reduced in a direction away from the mounting portion 110. When the hollow body 300 is installed in the clamping jaw, the hollow body 300 is firstly contacted with a relatively thin part on the clamping part 120, the relatively thin part is easy to deform slightly so as to facilitate the installation of the hollow body 300, and meanwhile, the part on the clamping part 120 connected with the installation part 110 is relatively thick, so that the connection strength of the clamping part 120 and the installation part 110 can be improved, and the clamping part 120 is prevented from being broken when being deformed slightly. The clamping portion 120 and the mounting portion 110 may be integrally formed, and in order to facilitate the clamping portion 120 to realize slight elastic deformation of itself and ensure toughness thereof, both the clamping portion 120 and the mounting portion 110 may be made of a plastic material.
As shown in fig. 2, the clamping portion 120 is inclined toward the hollow body 300 by a set angle α, so that the inner diameter of each fixing space at the opening position is slightly smaller than the outer diameter of the hollow body 300, and the inner diameter of the fixing space near the mounting portion 110 is equal to the outer diameter of the hollow body 300, so that the clamping of the hollow body 300 can be realized by slight deformation of the clamping portion 120, and the clamping portion 120 can be attached to the outer wall of the hollow body 300 after the hollow body 300 is completely inserted into the fixing space, thereby preventing the hollow body 300 from shaking in the radial direction, wherein the set angle α is preferably 5 ° to 8 °.
As shown in fig. 3, in order to facilitate fixing the clamping mechanism 100 to the lathe dog 400, in this embodiment, the mounting portion 110 may be provided with a fixing hole 112 for inserting a bolt, and the mounting portion 110 is mounted to the lathe dog 400 through the cooperation of the fixing hole 112 and the bolt.
Further, as shown in fig. 5, the positioning mechanism 200 further includes a first bearing 230, a first slot is disposed at a first end of the body 220, the first bearing 230 is fixedly disposed in the first slot, and the top pillar 210 is rotatably connected to the body 220 through the first bearing 230. When the hollow body 300 rotates along with the lathe jack 400, because the top pillar 210 is tightly pressed against the end of the hollow body 300, if the top pillar 210 does not rotate along with the hollow body 300, the top pillar 210 will cause a large resistance to the rotation of the hollow body 300 due to the friction force between the top pillar 210 and the hollow body 300, and further cause the trend that the rotating speeds at the two ends of the hollow body 300 are not synchronous, so that the hollow body 300 is subjected to the action of the torsional force to generate buckling deformation. Therefore, in the embodiment, the top column 210 is rotatably connected with the body 220 through the cooperation of the top column 210, the first bearing 230 and the body 220, so that the top column 210 can rotate along with the hollow body 300, and the body 220 does not cause resistance to the rotation of the top column 210, thereby ensuring the consistency of the rotation states of the two ends of the hollow body 300 and improving the turning quality of the hollow body 300. The first bearing 230 may be a ball bearing.
It will be appreciated that the axial force on the hollow body 300 is provided by the lathe thimble 500, and the lathe thimble 500 is stationary after the lathe thimble 500 abuts against the hollow body 300, but if the lathe thimble 500 is directly abutted against the hollow body 300 or the body 220, the hollow body 300 or the body 220 may be damaged. In order to bear the tightening force provided by the lathe thimble 500 and avoid large contact wear between the body 220 and the lathe thimble 500, in this embodiment, as shown in fig. 5, the positioning mechanism 200 may further include a second bearing 240, a second end of the body 220 is provided with a second slot and an avoiding hole 221, the avoiding hole 221 is communicated with the second slot, the second bearing 240 is fixedly disposed in the second slot, and the body 220 is rotatably connected to the lathe thimble 500 through the second bearing 240. The second bearing 240 may be a thrust bearing. It can be understood that, after the lathe thimble 500 is matched with the second bearing 240, the end of the lathe thimble 500 can be inserted into the avoiding hole 221, so that the matching reliability of the lathe thimble 500 and the second bearing 240 can be ensured, and the lathe thimble 500 is prevented from slipping off the second bearing 240.
Specifically, as shown in fig. 5, the top pillar 210 may include a guiding section 211 and a positioning section 212, wherein the diameter of the guiding section 211 is smaller than that of the positioning section 212, and a chamfer 213 is provided at a connection point of the guiding section 211 and the positioning section 212. The top column 210 can be inserted into the head 310 of the hollow body 300 through the guide section 211 to support the head 310 in the radial direction, and can be clamped on the edge of the head 310 through the chamfer angle 213, so that the head 310 can be provided with an axial force to realize the axial compression on the hollow body 300.
Further, in order to reduce the risk of gouging and scratching between the body 220 and the top column 210 and the lathe thimble 500 due to rigid contact, the body 220 may be a cylindrical structure made of rubber.
The hollow body fixture provided by the embodiment of the invention realizes clamping and fixing of the hollow body in the turning process by arranging the clamping mechanism, and ensures the stability of the hollow body in the processing process; and through setting up the positioning mechanism who includes body and fore-set, guaranteed the uniformity of hollow body both ends rotation state, avoid the hollow body to take place buckling deformation, promoted hollow body lathe work's quality.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.
Claims (10)
1. A hollow body jig, comprising:
a clamping mechanism for clamping and fixing the first end of the hollow body;
the positioning mechanism comprises a top column and a body, the second end of the body is used for being rotatably connected with a lathe thimble, the first end of the body is rotatably connected with the top column, and the top column is used for tightly pushing the second end of the hollow body.
2. The hollow body clamp of claim 1, wherein the clamping mechanism includes a plurality of jaws that are evenly circumferentially distributed with a distance between adjacent jaws.
3. The hollow body clamp of claim 2, wherein the clamping jaw includes a mounting portion and a clamping portion, one end of the clamping portion being fixedly connected to the mounting portion and the other end of the clamping portion extending away from the mounting portion;
a fixing space for fixing the hollow body is formed among the clamping parts;
the mounting portion is provided with arc-shaped portions, and positioning holes used for penetrating end heads on the hollow bodies are formed among the arc-shaped portions.
4. The hollow body jig according to claim 3, wherein the thickness of the clamping portion is tapered in a direction away from the mounting portion.
5. The hollow body jig according to claim 3, wherein the gripping portion is inclined at a set angle to the direction of the hollow body.
6. The hollow body jig according to claim 3, wherein the mounting portion is provided with a fixing hole for passing a bolt therethrough, and the mounting portion is mounted to a lathe dog by fitting the fixing hole and the bolt.
7. The hollow body clamp of claim 1, wherein the positioning mechanism further comprises a first bearing, the first end of the body is provided with a first slot, the first bearing is fixedly disposed in the first slot, and the top post is rotatably connected to the body through the first bearing.
8. The hollow clamp according to claim 1, wherein the positioning mechanism further comprises a second bearing, the second end of the body is provided with a second slot and an avoiding hole, the avoiding hole is communicated with the second slot, the second bearing is fixedly arranged in the second slot, and the body is rotatably connected with the lathe thimble through the second bearing.
9. The hollow body jig according to claim 1, wherein the top post includes a guide section and a positioning section, the guide section has a diameter smaller than that of the positioning section, and a chamfer is provided at a junction of the guide section and the positioning section.
10. The hollow body clamp of claim 1, wherein the body is a cylindrical structure of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910027730.3A CN109604657B (en) | 2019-01-11 | 2019-01-11 | Hollow body clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910027730.3A CN109604657B (en) | 2019-01-11 | 2019-01-11 | Hollow body clamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109604657A CN109604657A (en) | 2019-04-12 |
| CN109604657B true CN109604657B (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910027730.3A Active CN109604657B (en) | 2019-01-11 | 2019-01-11 | Hollow body clamp |
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| Country | Link |
|---|---|
| CN (1) | CN109604657B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110303549B (en) * | 2019-06-27 | 2021-03-09 | 亚普汽车部件股份有限公司 | Hollow body end clamp, punching device and punching method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001287101A (en) * | 2000-04-05 | 2001-10-16 | Sony Corp | Machine tool |
| DE502004010872D1 (en) * | 2003-11-26 | 2010-04-22 | Hilti Ag | Tool holder for a rotating and beating tool |
| CN2860693Y (en) * | 2006-02-15 | 2007-01-24 | 陈博奉 | Axle center axle end center hole processor |
| CN201076926Y (en) * | 2007-09-14 | 2008-06-25 | 中冶京唐建设有限公司 | Pipe chamfering auxiliary centering fixture for turning mill |
| CN203140793U (en) * | 2012-12-28 | 2013-08-21 | 大连瓦特重机床有限公司 | End-drive centre |
| CN203541545U (en) * | 2013-08-01 | 2014-04-16 | 中船澄西船舶修造有限公司 | Axial positioning combination device for lathe |
| CN103894641A (en) * | 2014-04-16 | 2014-07-02 | 江西江铃底盘股份有限公司 | Outer-ejection-type inner expansion clamping sleeve |
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2019
- 2019-01-11 CN CN201910027730.3A patent/CN109604657B/en active Active
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| Publication number | Publication date |
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| CN109604657A (en) | 2019-04-12 |
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