CN219074402U - Locking tool for special-shaped hollow perforated thin-wall part - Google Patents
Locking tool for special-shaped hollow perforated thin-wall part Download PDFInfo
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- CN219074402U CN219074402U CN202223174189.5U CN202223174189U CN219074402U CN 219074402 U CN219074402 U CN 219074402U CN 202223174189 U CN202223174189 U CN 202223174189U CN 219074402 U CN219074402 U CN 219074402U
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 45
- 230000000903 blocking effect Effects 0.000 claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 11
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
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Abstract
The utility model discloses a locking tool for a special-shaped hollow perforated thin-wall part, which comprises a penetrating shaft, wherein an outer cone sleeve is sleeved at the rear section of the penetrating shaft, a central blocking plate with an inner cone hole is sleeved outside the outer cone sleeve, and a locking nut is sleeved on the penetrating shaft at the rear end surface of the outer cone sleeve in a threaded manner; an outer taper ring is fixedly arranged at the front section of the penetrating shaft, and an inner taper sleeve is correspondingly sleeved on the outer taper ring; the outer cone sleeve consists of two half outer cone sleeves, the inner cone sleeve consists of two half inner cone sleeves, and the center blocking plate is in clearance fit with a hole at the rear end of the workpiece. The utility model has simple structure, convenient operation, high locking precision, repeated use and high clamping efficiency, and can not cause clamping deformation or influence the surface quality of products.
Description
Technical Field
The utility model discloses a locking tool, in particular to a locking tool for a special-shaped hollow perforated thin-wall part.
Background
In practical production, there are production demands of special-shaped hollow perforated thin-wall parts, as shown in fig. 5, the front end of the special-shaped hollow perforated thin-wall part (hereinafter referred to as a workpiece) is provided with a concave hole, the periphery of the bottom orifice is provided with a pin hole, and the rear end is provided with a hole, and the special-shaped structure causes the problem that the special-shaped structure is difficult to clamp effectively in the manufacturing process.
To above-mentioned work piece, current common accurate frock includes: and a central plug is arranged in the hole at the rear end, the central plug is matched with a certain interference according to the size of the hole of the hollow part, and the plug is pressed into the inner hole of the hollow part in a press-fit mode. And meanwhile, a bracket is welded on the front end wall surface and used as an auxiliary clamping position for connecting a lathe.
The locking method has the following defects:
(1) The plug tool can only be singly matched and cannot be reused. The plug tool is in interference fit with a hole at the rear end of the workpiece, so that the press-fitting and disassembly procedures are complicated, and the thin-wall workpiece body is extremely easy to damage.
(2) For the special-shaped thin-wall hollow part, after the central plug is assembled, an auxiliary clamping position is additionally arranged at the front end of the workpiece in a welding mode and the like for connecting the driving end of the lathe, and after the lathe operation is finished, the auxiliary clamping is removed, so that the operation is more complicated, the clamping precision is poor, the locking efficiency is low, and the surface quality of the workpiece is directly influenced by the addition of the welding point.
Therefore, the tool which is simple in structure, convenient to operate, high in precision, capable of being repeatedly utilized, convenient to clamp and free of clamping deformation is required to be designed for the thin-wall special-shaped hollow piece, and the technical problem to be solved by technicians is solved.
Disclosure of Invention
The utility model aims to solve the technical problems, and provides the special-shaped hollow perforated thin-wall part locking tool which is simple in structure, convenient to operate, high in locking precision, reusable, high in clamping efficiency and free from clamping deformation or affecting the surface quality of a product.
The locking tool comprises a penetrating shaft, wherein an outer cone sleeve is sleeved at the rear section of the penetrating shaft, a central blocking plate with an inner cone hole is sleeved outside the outer cone sleeve, and a locking nut is sleeved on the penetrating shaft at the rear end surface of the outer cone sleeve in a threaded manner; an outer taper ring is fixedly arranged at the front section of the penetrating shaft, and an inner taper sleeve is correspondingly sleeved on the outer taper ring; the outer cone sleeve consists of two half outer cone sleeves, the inner cone sleeve consists of two half inner cone sleeves, and the center blocking plate is in clearance fit with a hole at the rear end of the workpiece.
And a constant-height cushion block is sleeved on the penetrating shaft between the outer taper sleeve and the locking nut.
A pulling disc is further arranged on the penetrating shaft behind the outer cone ring, and a bolt hole corresponding to the peripheral pin hole of the concave hole orifice at the front end of the workpiece is arranged on the pulling disc.
The front end of the threading shaft is provided with an inserting shaft hole, and a lathe pulling shaft is inserted in the inserting shaft hole.
And the half outer taper sleeve is provided with a disassembly threaded hole.
The locking method of the special-shaped hollow perforated thin-wall part uses the locking tool to perform the following operations:
firstly), inserting a pulling bolt into a bolt hole in a pulling disc at the front section of a penetrating shaft, inserting the rear end of the penetrating shaft into the inner center of a workpiece from front to back through a hole opening from a concave hole of the workpiece, loading two half inner taper sleeves into the concave hole at the front end of the workpiece after the pulling disc of the penetrating shaft enters the concave hole, and forming an inner taper sleeve after assembly;
secondly), continuously pushing the penetrating shaft backwards to enable the rear end of the penetrating shaft to penetrate out of the center of a hole at the rear end of the workpiece, wherein an outer cone ring on the penetrating shaft is just inserted into the inner cone sleeve part, and the front end of a pulling plug pin in the pulling disc is just inserted into a pin hole at the periphery of a hole opening of a concave hole in the workpiece;
thirdly), sleeving a central blocking plate on the rear section of the workpiece, so that the central blocking plate just blocks a hole at the rear end of the workpiece; two half outer taper sleeves are arranged in an annular gap between the central blocking plate and the penetrating shaft, and the outer taper sleeves are formed after assembly;
fourth), the lock nut is installed and screwed into the rear end of the threading shaft, the threading shaft is driven to move backwards in the forward screwing process, the outer cone sleeve is completely pressed into an annular gap between the central blocking plate and the threading shaft to form interference fit, the central blocking plate tightly abuts against a hole at the rear end of a workpiece, meanwhile, the outer cone ring and the inner cone sleeve are completely inserted to form interference fit, and the inner cone sleeve is tightly abutted against the inner concave hole wall at the front end of the workpiece, so that the clamping process is completed.
In the fourth step, the back end of the penetrating shaft is sleeved with the equal-height cushion block, and then the locking nut is inserted and screwed.
The beneficial effects are that:
1) The tool and the corresponding locking method can change the interference fit between the central blocking plate and the hole at the rear end of the workpiece from the past interference fit into the clearance fit, so that the effective clamping is finished, the workpiece is not deformed, and the central blocking plate is easy to assemble and disassemble under the clearance fit, thereby greatly improving the locking efficiency, and each part of the tool can be repeatedly used, and further reducing the production cost;
2) The axial force is converted into the radial force by utilizing the cooperation of the outer conical ring and the inner conical sleeve on the penetrating shaft, so that the hole wall of the concave hole at the front end of the workpiece is compressed, the auxiliary clamping of the front end is realized, the front end of the penetrating shaft can be directly connected with the driving end of a lathe or is connected with the driving end of the lathe through the pulling shaft of the lathe, the auxiliary clamping position is not required to be independently welded, the problem of workpiece deformation or surface quality caused by the auxiliary clamping position is avoided, the operation difficulty is greatly reduced, the locking process is simplified, and the working efficiency is improved.
3) The outer taper sleeve and the inner taper sleeve are of split taper sleeve structures, so that the split taper sleeve is convenient to disassemble and free of blocking.
4) The pulling disc is connected with the hole at the front end of the workpiece through a pulling bolt, so that the reliable transmission of the rotating acting force from the penetrating shaft to the workpiece is improved when the lathe rotates.
5) The fixture disclosed by the utility model has the advantages of simple structure, convenience in operation, high precision, repeated utilization and convenience in clamping, and the problem of clamping deformation is effectively avoided.
Drawings
Fig. 1 is a schematic view of the locking state of the present utility model.
FIG. 2 is a schematic view of a mandrel
FIG. 3 is a force analysis chart of the split inner cone sleeve.
FIG. 4 is a force analysis chart of the split outer cone sleeve.
Fig. 5 is a schematic structural view of a thin-walled member with holes.
The device comprises a 1-workpiece, a 1.1-concave hole, a 1.2-orifice, a 1.3-hole, a 1.4-pin hole, a 2-spindle, a 2.1-spindle insertion hole, a 2.2-outer taper ring, a 2.3-stirring disc, a 2.4-locking thread, a 2.5-pin hole, a 3-lathe stirring shaft, a 4-inner taper sleeve, a 4.1-half inner taper sleeve, a 5-stirring pin, a 6-outer taper sleeve, a 6.1-half outer taper sleeve, a 7-center plugging plate, a 7.1-inner taper hole, an 8-equal-height cushion block, a 9-locking nut and a 10-disassembling screw hole.
Detailed Description
The tooling structure of the utility model is further explained below with reference to the accompanying drawings:
referring to fig. 1 and 2, the real locking tool of the utility model comprises a penetrating shaft 2, wherein an outer taper sleeve 6 is sleeved at the rear section of the penetrating shaft 2, a central blocking plate 7 with an inner taper hole 7.1 is sleeved outside the outer taper sleeve 6, a locking thread 2.4 is arranged on the penetrating shaft 2 at the rear end surface of the outer taper sleeve 6, a locking nut 9 is sleeved on the penetrating shaft 2 in a threaded manner, and a constant-height cushion block 8 is sleeved on the penetrating shaft 2 between the outer taper sleeve 6 and the locking nut 9; an outer conical ring 2.2 is fixedly arranged at the front section of the penetrating shaft 2, and an inner conical sleeve 4 is correspondingly sleeved on the outer conical ring 2.2; the pull-out disc 2.3 is further arranged on the through shaft 2 behind the outer cone ring 2.2, and the pull-out disc 2.3 is provided with a bolt hole 2.5 corresponding to the peripheral pin hole 1.4 of the orifice 1.2 of the concave hole 1.1 at the front end of the workpiece 1.
The outer taper sleeve 6 consists of two half outer taper sleeves 6.1, a disassembly threaded hole 10 is formed in each half outer taper sleeve 6.1, the inner taper sleeve 4 consists of two half inner taper sleeves 4.1, and the center blocking plate 6 is in clearance fit with a hole 1.3 at the rear end of the workpiece 1.
The driving end of the lathe can be directly connected with the threading shaft 2 to drive the threading shaft to rotate.
In another embodiment, an insertion shaft hole 2.1 is provided at the front end of the through shaft 2, a lathe pulling shaft 3 is inserted into the insertion shaft hole 2.1, and the insertion shaft 3 is connected with the driving end of the lathe.
The workpiece 1 is a special-shaped hollow thin-wall piece with holes, which is shown in fig. 5, and is of a hollow thin-wall structure, the front end of the workpiece is provided with a concave hole 1.1, the periphery of a bottom orifice 1.2 is provided with a pin hole 1.4, and the rear end of the workpiece is provided with a hole 1.3.
The locking method of the workpiece comprises the following steps:
firstly), inserting a pulling bolt 5 into a bolt hole 2.5 in a pulling disc 2.3 at the front section of a penetrating shaft 2, inserting the rear end of the penetrating shaft 2 from front to back into the inner center of a workpiece 1 from a concave hole 1.1 of the workpiece 1 through a hole opening 1.2, loading two half inner cone sleeves 4.1 into the concave hole 1.1 at the front end of the workpiece 1 after the pulling disc 2.3 of the penetrating shaft 2 enters the concave hole 1.1, and forming the inner cone sleeves 4.1 after assembly;
secondly), continuously pushing the penetrating shaft 2 backwards to enable the rear end of the penetrating shaft to penetrate out of the center of the hole 1.3 at the rear end of the workpiece 1, wherein the outer conical ring 2.3 on the penetrating shaft 2 is just inserted into the inner conical sleeve 4, and the front end of the pulling plug pin 5 in the pulling disc 2.3 is just inserted into the pin hole 1.4 at the periphery of the hole 1.1 of the workpiece 1;
thirdly, sleeving a central blocking plate 7 on the rear section of the workpiece 1, so that the central blocking plate 7 just blocks the hole 1.3 at the rear end of the workpiece 1; two half outer cone sleeves 6.1 are arranged in an annular gap between the central blocking plate 7 and the penetrating shaft 2, and the outer cone sleeves 6 are formed after assembly;
fourth), after sleeving the equal-height cushion block 8 into the rear end of the penetrating shaft 2, then installing the locking nut 9 and screwing, driving the penetrating shaft 2 to move backwards in the forward screwing process, completely pressing the outer taper sleeve 6 into the annular gap between the central blocking plate 7 and the penetrating shaft 2 to form interference fit, tightly propping the central blocking plate 7 against the hole at the rear end of the workpiece 1, simultaneously enabling the outer taper ring 2.3 and the inner taper sleeve 4 to be fully inserted to form interference fit, and tightly propping the inner taper sleeve 4 against the hole wall of the concave hole 1.3 at the front end of the workpiece 1, thus completing the clamping process.
The disassembly process comprises the following steps:
when the half outer taper sleeve 6.1 is disassembled, the locking nut 9 is firstly screwed out, the equal-height cushion block 8 is taken out, then the disassembling tool is screwed into the disassembling screw hole 10 of the half outer taper sleeve 6.1, after one half outer taper sleeve 6.1 is pulled out, the other half outer taper sleeve can be conveniently disassembled, the acting force of the center blocking plate 7 is relieved, and the center blocking plate is loosened, so that the half outer taper sleeve can be conveniently taken down; then, the outer cone ring 2.3 and the inner cone sleeve 4 can be separated by applying a forward axial force to the penetrating shaft 2, and the penetrating shaft 2, the inner cone sleeve 4 and other components are disassembled in sequence.
And (3) stress analysis:
referring to fig. 3 and 4, the inner cone sleeve 4 is subjected to an axial pulling force F of the through-shaft 2 Shaft The tensile force is decomposed into F1 and F2 on the conical surfaces of the two half inner conical sleeves 4.1; the F1 is perpendicular to the pressure of the conical surface, and the pressure can enable the two half inner conical sleeves 4.1 to be radially opened to press the hole wall of the concave hole 1.1 of the workpiece 1, so that the clamping precision is ensured; f2 is the pulling force along the conical surface, tensioning the inner cone sleeve 4.
Referring to fig. 4, the outer cone 6 is pressed by the pressing force F of the contour pad 8, which is decomposed into F3 and F4 on the conical surfaces of the two half outer cones 6.1; the F3 is perpendicular to the pressure of the conical surface, the pressure can enable the two half outer conical sleeves 6.1 to be radially opened and cling to the inner conical surface of the central plugging plate 7, and meanwhile, the F3 enables the inner hole of the outer conical sleeve 6 to cling to the penetrating shaft 2, so that the clamping precision is ensured; f4 is the pulling force along the conical surface, and the central blocking plate 7 is tensioned, so that the periphery of the central blocking plate 7 is caused to be clung to the hole at the rear end of the workpiece 1, and the clamping precision is ensured.
Transmission analysis:
the rotary power of the lathe driving end drives the penetrating shaft 2 to rotate through the lathe poking shaft 3, a poking bolt 5 of a poking disc 2.3 on the penetrating shaft 2 is connected with a pin hole 1.4 of the workpiece 1, and finally the workpiece 1 is driven to rotate; meanwhile, the conical surfaces of the inner conical sleeve 4 and the outer conical sleeve 6 are in interference fit due to extrusion, and the workpiece 1 can be driven to rotate.
Claims (5)
1. The special-shaped hollow perforated thin-wall part locking tool comprises a perforating shaft and is characterized in that an outer cone sleeve is sleeved at the rear section of the perforating shaft, a central blocking plate with an inner cone hole is sleeved outside the outer cone sleeve, and a locking nut is sleeved on the perforating shaft at the rear end surface of the outer cone sleeve in a threaded manner; an outer taper ring is fixedly arranged at the front section of the penetrating shaft, and an inner taper sleeve is correspondingly sleeved on the outer taper ring; the outer cone sleeve consists of two half outer cone sleeves, the inner cone sleeve consists of two half inner cone sleeves, and the center blocking plate is in clearance fit with a hole at the rear end of the workpiece.
2. The special-shaped hollow perforated thin-wall part locking tool according to claim 1, wherein a through shaft between the outer taper sleeve and the locking nut is also sleeved with a cushion block with equal height.
3. The special-shaped hollow perforated thin-wall part locking tool according to claim 1 or 2, wherein a pulling disc is further arranged on a penetrating shaft behind the outer cone ring, and a bolt hole corresponding to a peripheral pin hole of a concave hole orifice at the front end of the workpiece is arranged on the pulling disc.
4. The special-shaped hollow perforated thin-wall part locking tool according to claim 1, wherein the front end of the penetrating shaft is provided with an inserting shaft hole, and a lathe pulling shaft is inserted into the inserting shaft hole.
5. The special-shaped hollow perforated thin-wall part locking tool according to claim 1, wherein the semi-outer taper sleeve is provided with a detachable threaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223174189.5U CN219074402U (en) | 2022-11-29 | 2022-11-29 | Locking tool for special-shaped hollow perforated thin-wall part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223174189.5U CN219074402U (en) | 2022-11-29 | 2022-11-29 | Locking tool for special-shaped hollow perforated thin-wall part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219074402U true CN219074402U (en) | 2023-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223174189.5U Active CN219074402U (en) | 2022-11-29 | 2022-11-29 | Locking tool for special-shaped hollow perforated thin-wall part |
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| CN (1) | CN219074402U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115921924A (en) * | 2022-11-29 | 2023-04-07 | 武汉重工铸锻有限责任公司 | Locking method and special locking tool for special-shaped hollow thin-walled parts with holes |
-
2022
- 2022-11-29 CN CN202223174189.5U patent/CN219074402U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115921924A (en) * | 2022-11-29 | 2023-04-07 | 武汉重工铸锻有限责任公司 | Locking method and special locking tool for special-shaped hollow thin-walled parts with holes |
| CN115921924B (en) * | 2022-11-29 | 2025-07-15 | 武汉重工铸锻有限责任公司 | Locking method and special locking tooling for special-shaped hollow thin-walled parts with holes |
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