CN218460910U - Internal support type positioning fixture for circular through hole workpiece - Google Patents
Internal support type positioning fixture for circular through hole workpiece Download PDFInfo
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- CN218460910U CN218460910U CN202222422303.5U CN202222422303U CN218460910U CN 218460910 U CN218460910 U CN 218460910U CN 202222422303 U CN202222422303 U CN 202222422303U CN 218460910 U CN218460910 U CN 218460910U
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- 239000011148 porous material Substances 0.000 abstract description 5
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract 2
- 235000017491 Bambusa tulda Nutrition 0.000 abstract 2
- 241001330002 Bambuseae Species 0.000 abstract 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract 2
- 239000011425 bamboo Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
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Abstract
The utility model discloses an internal stay formula positioning fixture for circular through-hole work piece, which comprises a main shaft, expansion cylinder and retaining member, two sections that are close to both ends on the main shaft are centre gripping section and external screw thread section respectively, the middle section of main shaft is the main shaft cone section, one section or whole the screw that the retaining member was equipped with central through-hole and this central through-hole, two sections that are close to both ends on the retaining member are retaining member cone section and retaining member square section respectively, the external screw thread section is arranged in the central through-hole of retaining member and is passed through threaded connection, the expansion cylinder is cylindrical, the position that is close to both ends in the central through-hole of expansion cylinder is expansion cylinder cone hole respectively, retaining member cone section, the tapering of main shaft cone section and expansion cylinder cone hole is the same. The utility model discloses can realize the synchronous expansion inflation of enlarging at an inflation section of thick bamboo both ends, the both ends of an inflation section of thick bamboo and the pore wall of circular through-hole work piece be in close contact with simultaneously, realize longer linking area, have improved clamping stability and positioning accuracy, especially are fit for the longer circular through-hole work piece of centre gripping length.
Description
Technical Field
The utility model relates to a positioning fixture for circular through-hole work piece especially relates to an internal stay formula positioning fixture for circular through-hole work piece.
Background
In machining, a circular through hole workpiece is often encountered, the workpiece is generally in a cylindrical shape, the outer surface and the inner surface of the workpiece are both smooth cylindrical surfaces, and if a local structure needs to be machined, the workpiece is difficult to position and clamp.
The clamping method for the workpiece with the circular through hole mainly comprises an external clamping method and an internal supporting clamping method, wherein the external clamping method is used for clamping the outer wall of the workpiece through a clamp, the external clamping method is possibly used for scraping the surface of the outer wall of the workpiece, and therefore the application is less, and the internal supporting clamping method is used for achieving the clamping purpose by placing the clamp in the circular through hole and expanding the clamp towards the peripheral direction, and the external clamping method is more applied.
A traditional internal stay formula positioning fixture for circular through-hole work piece adopts conical surface cooperation structure more, and the outer wall of internal connection spare and the inner wall of outside inflation piece are the toper, utilize the axial displacement of internal connection spare to realize the circumference expansion to outside inflation piece, make its pore wall in close contact with circular through-hole to realize location clamping function.
The defect of the traditional internal-supporting positioning fixture is as follows:
the inner connecting piece and the outer expansion piece are only one, after clamping is completed, the inner connecting piece and the workpiece are tightly connected through the outer expansion piece, the length of a connecting area is short, clamping stability and positioning accuracy are not high, and the clamping device is particularly not suitable for clamping a round through-hole workpiece with a long length.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an internal stay formula positioning fixture for circular through-hole work piece that stability of centre gripping and positioning accuracy are high just for solving above-mentioned problem.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
an internal support type positioning fixture for a circular through-hole workpiece comprises a main shaft, an expansion cylinder and a locking piece, wherein one section of the main shaft close to a first end in two ends is a clamping section, one section of the main shaft close to a second end in two ends is provided with an external thread to form an external thread section, the middle section circumferential outer wall of the main shaft is conical to form a main shaft conical section, a large diameter end of the main shaft conical section is close to the clamping section, the locking piece is provided with a central through hole, one section or all of the central through hole is a screw hole, the circumferential outer wall of the locking piece close to the first end in two ends is conical to form a locking piece conical section, the end part of the locking piece is a small diameter end, the expansion cylinder is a cylindrical cylinder, the outer diameter of the expansion cylinder is smaller than the aperture of the central through hole of the circular through hole, the outer diameter of the central through hole of the locking piece is arranged in the threaded connection, the small diameter end of the locking piece conical section is close to the main shaft conical section, the small diameter end of the expansion cylinder is smaller than the main shaft conical section, the main shaft conical section and the main shaft conical section is larger than the main shaft conical section, the main shaft conical section and the expansion cylinder, the main shaft conical section is larger than the main shaft conical section, the expansion cylinder, the main shaft conical section and the main shaft conical section of the expansion cylinder are arranged in the expansion cylinder, the main shaft conical section, the expansion cylinder, the main shaft conical section and the main shaft conical section are larger diameter of the main shaft conical section of the expansion cylinder are larger diameter of the large diameter of the expansion cylinder, the expansion cylinder is characterized in that a plurality of radial first expansion cylinder through holes are uniformly formed in the circumferential cylinder wall close to a first end in two ends of the expansion cylinder, a plurality of radial second expansion cylinder through holes are uniformly formed in the circumferential cylinder wall close to a second end in two ends of the expansion cylinder, axial first strip-shaped through holes are respectively formed in the positions, located between the second end and each first expansion cylinder through hole, of the expansion cylinder, one end of each first strip-shaped through hole is communicated with the corresponding first expansion cylinder through hole, the other end of each first strip-shaped through hole extends to the second end of the expansion cylinder, is opened and is located between the two adjacent second expansion cylinder through holes, axial second strip-shaped through holes are respectively formed in the positions, located between the first end and each second expansion cylinder through hole, of each second strip-shaped through hole is communicated with the corresponding second expansion cylinder through hole, and the other end of each second strip-shaped through hole extends to the first end of the expansion cylinder, is opened and is located between the two adjacent first expansion cylinder through holes.
Preferably, in order to increase the strength of the main shaft, a main shaft cylindrical section is provided on the main shaft at a position between the external thread section and the main shaft conical section, and an outer diameter of the main shaft cylindrical section is larger than an outer diameter of the external thread section and smaller than an outer diameter of a small diameter end of the main shaft conical section.
Preferably, in order to limit the circular through-hole workpiece to realize quick and reliable connection, a limiting convex ring protruding towards the outer circumferential direction is arranged at a position, located between the spindle conical section and the clamping section, on the spindle, and the outer diameter of the limiting convex ring is larger than the outer diameter of the clamping section and the outer diameter of the large-diameter section of the spindle conical section.
As the preferred, for the intensity that improves the retaining member, lie in on the retaining member the square section of retaining member with position between the retaining member cone section is equipped with retaining member cylinder section, the external diameter of retaining member cylinder section with the major diameter end external diameter of retaining member cone section is the same and is greater than the square section of retaining member with the biggest external diameter.
Preferably, in order to avoid overlong reduction in strength of the threaded connection section, one section of the central through hole of the locking member is a screw hole, the screw hole is close to the second end of the locking member, and the aperture of the screw hole is smaller than that of the other section.
The beneficial effects of the utility model reside in that:
the utility model discloses a main shaft and retaining member that the setting passes through screw thread interconnect, and set up main shaft conic section at the main shaft, set up retaining member conic section on the retaining member, set up expansion cylinder conical hole on the both ends inner wall of an expansion cylinder simultaneously, utilize between the pore wall of main shaft conic section and an expansion cylinder conical hole, conical surface cooperation between the pore wall of retaining member conic section and another expansion cylinder conical hole, realize the synchronous expansion inflation that enlarges at expansion cylinder both ends, the both ends of an expansion cylinder and circular through-hole work piece's pore wall in close contact with simultaneously, thereby realize longer connected region, the clamping stability and positioning accuracy have been improved, especially be fit for the longer circular through-hole work piece of centre gripping length.
Drawings
Fig. 1 is a perspective view of the internal bracing positioning fixture for a circular through-hole workpiece of the present invention before assembly, and also shows the circular through-hole workpiece;
fig. 2 is a front sectional view of an expansion cylinder of the internal stay type positioning fixture for circular through-hole workpieces according to the present invention, wherein the scale of the expansion cylinder is larger than that of fig. 1;
fig. 3 is a front sectional view of the inner supporting type positioning fixture for circular through-hole workpieces after assembly when applied, and the proportion in the figure is smaller than that in fig. 2.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1 and 2, the internal support type positioning fixture for circular through-hole workpieces of the present invention comprises a main shaft 4, an expansion cylinder 3 and a locking member 2, a section of the main shaft 4 near a first end of the two ends is a clamping section 45, a section of the main shaft 4 near a second end of the two ends is provided with an external thread to form an external thread section 41, a middle section circumferential outer wall of the main shaft 4 is conical to form a main shaft conical section 43, a large diameter end of the main shaft conical section 43 is near the clamping section 45, the locking member 2 is provided with a central through hole 21 and one or all of the central through holes are threaded holes, a circumferential outer wall of the locking member 2 near the first end of the two ends is conical to form a locking member conical section 24 and the end is a small diameter end, a circumferential outer wall of the locking member 2 near the second end of the two ends is polygonal to form a locking member square section 22, the external thread section 41 is disposed in the central through hole 21 of the locking member 2 and is connected through a thread, a small diameter end of the locking member conical section 24 is near a small diameter end of the main shaft conical section 43, the expansion cylinder 3 is a cylindrical cylinder, an external diameter section 35 is smaller than a large diameter section of the main shaft conical section 35 and a large diameter section of the main shaft conical section 35, an expansion cylinder 35 is near the main shaft conical section 35, a plurality of radial first expansion cylinder through holes 31 are uniformly formed in the circumferential cylinder wall close to the first end of the two ends of the expansion cylinder 3, a plurality of radial second expansion cylinder through holes 34 are uniformly formed in the circumferential cylinder wall close to the second end of the two ends of the expansion cylinder 3, axial first strip-shaped through holes 32 are respectively formed in the positions, located between the second end and each first expansion cylinder through hole 31, of the expansion cylinder 3, one end of each first strip-shaped through hole 32 is communicated with the corresponding first expansion cylinder through hole 31, the other end of each first strip-shaped through hole extends to the second end of the expansion cylinder 3, is open and is located between two adjacent second expansion cylinder through holes 34, axial second strip-shaped through holes 33 are respectively formed in the positions, located between the first end and each second expansion cylinder through hole 34, of each second strip-shaped through hole 33 is communicated with the corresponding second expansion cylinder through hole 34, and the other end of each second strip-shaped through hole 33 extends to the first end of the expansion cylinder 3, is open and is located between two adjacent first expansion cylinder through holes 31.
As shown in fig. 1-2, the utility model also discloses following a plurality of more optimized concrete structures:
in order to increase the strength of the spindle 4, a spindle cylindrical section 42 is provided on the spindle 4 at a position between the male thread section 41 and the spindle conical section 43, and the outer diameter of the spindle cylindrical section 42 is larger than the outer diameter of the male thread section 41 and smaller than the outer diameter of the small-diameter end of the spindle conical section 43.
In order to facilitate the limitation of the circular through hole workpiece 1 to realize quick and reliable connection, a limiting convex ring 44 protruding towards the outer circumferential direction is arranged at a position between the spindle conical section 43 and the clamping section 45 on the spindle 4, and the outer diameter of the limiting convex ring 44 is larger than the outer diameter of the clamping section 45 and the outer diameter of the large-diameter section of the spindle conical section 43.
In order to improve retaining member 2's intensity, the position that lies in between retaining member square section 22 and retaining member cone section 24 on the retaining member 2 is equipped with retaining member cylinder section 23, and the external diameter of retaining member cylinder section 23 is the same with the major diameter end external diameter of retaining member cone section 24 and is greater than the square section 22 of retaining member and the biggest external diameter.
In order to avoid the overlong screw connection section and reduce the strength, one section of the central through hole 21 of the locking member 2 is a screw hole which is close to the second end of the locking member 2 and the aperture of the screw hole is smaller than that of the other section.
As shown in fig. 1-3, when in use, the external thread section 41 of the spindle 4 and the locking member 2 are firstly placed in the expansion cylinder 3, and the external thread section 41 is connected with the screw hole of the locking member 2, so that the hole walls of the conical holes 35 of the expansion cylinder at the two ends of the expansion cylinder 3 are respectively contacted with the conical sections 24 of the locking member and the conical sections 43 of the spindle; then, the circular through-hole workpiece 1 is sleeved outside corresponding parts of the locking part 2 and the main shaft 4 through the central through-hole 11 per se, one end face of the circular through-hole workpiece 1 is made to be in contact with a corresponding end face of the limiting convex ring 44, then, a wrench tool such as a socket wrench is sleeved on the locking part square section 22 of the locking part 2 and rotates to enable the locking part 2 and the main shaft 4 to be close to each other, in the process, the locking part conical section 24 and the main shaft conical section 43 respectively push the hole walls of the expansion cylinder conical holes 35 at two ends of the expansion cylinder 3 to expand and expand towards the outer circumferential direction until the outer walls at two ends of the expansion cylinder 3 are in close contact with the hole wall of the central through-hole 11 of the circular through-hole workpiece 1, at the moment, the assembly of the clamp and the connection with the circular through-hole workpiece 1 are completed, and then, the clamping section 45 is installed on a clamp of a machine tool such as a three-jaw chuck, and the local processing of the circular through-hole workpiece 1 can be performed.
The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.
Claims (5)
1. The utility model provides an internal stay formula positioning fixture for circular through-hole work piece which characterized in that: the clamping device comprises a main shaft, an expansion cylinder and a locking piece, wherein one section of the main shaft close to a first end in two ends is a clamping section, one section of the main shaft close to a second end in the two ends is provided with an external thread to form an external thread section, the circumferential outer wall of the middle section of the main shaft is conical to form a main shaft conical section, the large-diameter end of the main shaft conical section is close to the clamping section, the locking piece is provided with a central through hole, one section or all of the central through hole is a screw hole, the circumferential outer wall of the locking piece close to the first end in the two ends is conical to form a locking piece conical section, the end part of the locking piece is a small-diameter end, the circumferential outer wall of the locking piece close to the second end in the two ends is a polygon to form a locking piece square section, the external thread section is arranged in the central through hole of the locking piece and is connected through threads, the small-diameter end of the locking piece conical section is close to the small-diameter end of the main shaft conical section, the expansion cylinder is a cylindrical cylinder, the outer diameter of the expansion cylinder is smaller than the aperture of the central through hole of the circular through hole workpiece, the positions, close to two ends, in the central through hole of the expansion cylinder are respectively conical to form an expansion cylinder conical hole, one end, close to the central position of the expansion cylinder, in the expansion cylinder conical hole is a small-diameter end, the conical sections of the locking piece, the spindle and the expansion cylinder are the same in taper, the aperture of the small-diameter end of the expansion cylinder conical hole is larger than the outer diameter of the small-diameter end of the spindle conical section and the outer diameter of the small-diameter end of the locking piece conical section and smaller than the outer diameter of the large-diameter end of the spindle conical section and the outer diameter of the large-diameter end of the locking piece conical section, the aperture of the large-diameter end of the expansion cylinder conical hole is larger than the outer diameter of the large-diameter end of the spindle conical section and the outer diameter of the large-diameter end of the locking piece conical section, a plurality of radial first expansion cylinder through holes are uniformly arranged on the circumferential cylinder wall, close to the first end of the two ends, of the expansion cylinder, the expansion cylinder is characterized in that a plurality of radial second expansion cylinder through holes are uniformly formed in the circumferential cylinder wall close to the second end in the two ends, axial first strip-shaped through holes are formed in the expansion cylinder at positions between the second end and each first expansion cylinder through hole, one end of each first strip-shaped through hole is communicated with the corresponding first expansion cylinder through hole, the other end of each first strip-shaped through hole extends to the second end of the expansion cylinder, the second end of the expansion cylinder is open, the expansion cylinder is located between the two adjacent second expansion cylinder through holes, axial second strip-shaped through holes are formed in the expansion cylinder at positions between the first end and each second expansion cylinder through hole, one end of each second strip-shaped through hole is communicated with the corresponding second expansion cylinder through hole, the other end of each second strip-shaped through hole extends to the first end of the expansion cylinder, the opening of the expansion cylinder is located between the two adjacent first expansion cylinder through holes.
2. The internally-supporting positioning fixture for the circular through-hole workpiece according to claim 1, characterized in that: and a main shaft cylindrical section is arranged on the main shaft at the position of the external thread section and the main shaft conical section, and the outer diameter of the main shaft cylindrical section is larger than that of the external thread section and smaller than that of the small-diameter end of the main shaft conical section.
3. The internally-supporting positioning jig for the circular through-hole workpiece according to claim 1 or 2, characterized in that: the main shaft is provided with a limiting convex ring protruding towards the outer circumferential direction, and the outer diameter of the limiting convex ring is larger than the outer diameter of the clamping section and the outer diameter of the large-diameter section of the main shaft conical section.
4. The internally-supporting positioning jig for a circular through-hole workpiece according to claim 1 or 2, characterized in that: lie in on the retaining member square section with position between the retaining member conical section is equipped with retaining member cylinder section, the external diameter of retaining member cylinder section with the major diameter end external diameter of retaining member conical section is the same and is greater than the maximum external diameter of retaining member square section with.
5. The internally-supporting positioning jig for a circular through-hole workpiece according to claim 1 or 2, characterized in that: one section of the central through hole of the locking piece is a screw hole, the screw hole is close to the second end of the locking piece, and the aperture of the screw hole is smaller than that of the other section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222422303.5U CN218460910U (en) | 2022-09-14 | 2022-09-14 | Internal support type positioning fixture for circular through hole workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222422303.5U CN218460910U (en) | 2022-09-14 | 2022-09-14 | Internal support type positioning fixture for circular through hole workpiece |
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| Publication Number | Publication Date |
|---|---|
| CN218460910U true CN218460910U (en) | 2023-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222422303.5U Active CN218460910U (en) | 2022-09-14 | 2022-09-14 | Internal support type positioning fixture for circular through hole workpiece |
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| CN (1) | CN218460910U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119456948A (en) * | 2025-01-10 | 2025-02-18 | 闽西职业技术学院 | A steel structure support for carrying a large fan hub mud core shell |
-
2022
- 2022-09-14 CN CN202222422303.5U patent/CN218460910U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119456948A (en) * | 2025-01-10 | 2025-02-18 | 闽西职业技术学院 | A steel structure support for carrying a large fan hub mud core shell |
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