CN111112668A - Linkage type step hole internal expansion mandrel fixture for numerical control lathe - Google Patents
Linkage type step hole internal expansion mandrel fixture for numerical control lathe Download PDFInfo
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- CN111112668A CN111112668A CN201811276884.8A CN201811276884A CN111112668A CN 111112668 A CN111112668 A CN 111112668A CN 201811276884 A CN201811276884 A CN 201811276884A CN 111112668 A CN111112668 A CN 111112668A
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- floating
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- control lathe
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- 238000000034 method Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 4
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 241000287828 Gallus gallus Species 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005570 vertical transmission Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
- B23B31/404—Gripping the work or tool by jaws moving radially controlled by conical surfaces
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
Abstract
The invention relates to a linkage type step hole internal expansion mandrel fixture for a numerical control lathe, which comprises a support shaft (4), two taper nuts arranged on the support shaft (4) at intervals by opposite threads, and a floating expansion sleeve (6) for expanding and fixing a part (7) to be processed, wherein two ends of the floating expansion sleeve (6) are floating end parts (61) with telescopic outer diameters, circular truncated cone-shaped holes matched with the tapers of the outer surfaces of the taper nuts are processed on the inner sides of the floating end parts (61), and the two taper nuts respectively and correspondingly extend into the inner wall surfaces of the circular truncated cone-shaped holes abutting against the two floating end parts (61), so that the floating expansion sleeve (6) is fixedly sleeved on the support shaft (4). Compared with the prior art, the invention can complete the one-time turning of two end surfaces and an excircle of a part by matching with a numerical control lathe, thereby ensuring the high parallelism of the two end surfaces and the high perpendicularity of the two end surfaces and the outer diameter, and having flexible and convenient processing process and the like.
Description
Technical Field
The invention belongs to the technical field of numerical control machining key parts, and relates to a linkage type stepped hole internal expansion mandrel clamp for a numerical control lathe.
Background
At present, for step hole pipe parts with coaxiality requirements on step inner holes and outer diameters, how to ensure that the inner holes at two ends and the processed outer diameters simultaneously reach higher coaxiality requirements is a difficult problem facing the industry, and two methods are commonly used at present: one method is that after an outer circle is machined on a lathe, the outer circle is clamped to machine two step holes at one time, and the other method is that a four-axis boring cutter is used for machining a machining center. The second method requires four-axis machining equipment, so that the equipment cost and the working hour cost are high, the boring efficiency is lower than that of a lathe, the precision is not as good as that of the lathe, the adjustment of the boring cutter is more troublesome than the direct cutter replacement of the lathe, the economy is not good, and meanwhile, due to the problem of repeated positioning precision of four-axis rotation, the coaxiality of products with higher precision is still difficult to guarantee. The conventional tension mandrel has the defects that the requirement on the dimensional tolerance of the clamping position of the inner hole is strict, each mandrel can only adapt to a very small range, the universality is poor, and the manufacturing cost is extremely high.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a linkage type step hole internal expansion mandrel clamp for a numerical control lathe.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a downthehole dabber anchor clamps that rises of coordinated type step for numerical control lathe, includes that back shaft, opposite thread interval install two tapering nuts on the back shaft to and be used for rising tightly fixed treating the unsteady cover that rises of processing part, the both ends that rise the cover that floats are the unsteady tip of external diameter telescopic, the inboard processing of the tip that floats have with the circular platform shape hole of the tapering matching of tapering nut surface to correspond the internal face that stretches into the circular platform shape hole that supports two unsteady tips respectively through two tapering nuts, make unsteady cover fixed cover that rises on the back shaft.
Furthermore, the taper of the circular truncated cone-shaped holes on the two floating end parts of the floating expansion sleeve is the same and the circular truncated cone-shaped holes are concentric.
Further, the outer surfaces of the two taper nuts are kept flat.
Furthermore, the floating end part is composed of a plurality of floating pieces which are arranged around the central shaft of the floating expansion sleeve at intervals, and the inner surfaces of all the floating pieces are matched to form the circular truncated cone-shaped hole.
Furthermore, a locking nut which is propped against the outer end of one of the taper nuts is also arranged on the supporting shaft.
Furthermore, a heart-shaped clamp is fixedly arranged at one end of the supporting shaft close to the locking nut, and a connecting rod connected with a spindle of the numerical control lathe is arranged on the heart-shaped clamp.
Furthermore, a handle piece which is convenient to rotate is arranged on the outer end face of the other taper nut.
Furthermore, two mounting holes concentric with the central axis of the support shaft are further processed on two end faces of the support shaft so as to be respectively matched with the main shaft tip and the tailstock tip for mounting.
Furthermore, during operation, the minimum diameter of the floating end part is not larger than the diameter of the corresponding position of the inner hole of the part to be processed, and the maximum diameter of the floating end part is larger than the diameter of the corresponding position of the inner hole of the part to be processed.
Compared with the prior art, the invention has the following advantages:
(1) the invention can effectively change the traditional mode of firstly processing the outer diameter and then processing the inner diameter, and change the mode into firstly processing the inner diameter and then processing the outer diameter, so that the quality is more stable, and the efficiency is improved.
(2) The universal property of the common mandrel is changed to be poor, the limitation of a small application range is changed, the integral floating elastic expansion core is pushed through the rotary adjusting nut, the two ends are clamped simultaneously, the requirement of a workpiece with a large tolerance is met, the adjustment of a proper position is realized rapidly through the full thread in the middle section of the supporting shaft, and the combination form is various and convenient.
(3) Good economical efficiency: the tool is easy to manufacture, simple and reliable in structure, low in precision requirement on a clamping hole, convenient to clamp, capable of achieving the function of clamping two ends only by screwing the nut with one end, easy to operate, obvious in efficiency improvement, greatly improved in universality and remarkable in economic benefit.
(4) The taper nuts and the floating expansion sleeves with different outer diameters can be greatly adapted to the requirements of workpieces with different step apertures, the cost of the taper nuts and the floating expansion sleeves is very low, the cost is remarkably reduced compared with that of a conventional expansion core, and at least the cost is reduced by more than 80%.
(5) The mandrel is simple in structure and easy to manufacture, shortens the manufacturing period by more than half compared with the conventional mandrel, greatly improves the timeliness, and is good in economy and strong in adaptability.
(6) The quality is stable and reliable: the two end faces and the outer diameter can be completely machined in one-step clamping by utilizing proper support position adjustment, the parallelism of the two end faces is ensured, the perpendicularity of the two end faces and the outer diameter can reach high precision and keep stable, and meanwhile, the cylindricity of the inner circle and the outer circle after machining also reaches a high level due to the fact that the inner diameter support surface is large.
(7) The expansion mandrel clamp provided by the invention not only ensures automatic adjustment and clamping, but also is easy to clamp and convenient to operate.
Drawings
FIG. 1 is a schematic illustration of an explosive structure according to the present invention;
FIG. 2 is a schematic view of the present invention during processing;
the notation in the figure is:
1-a chicken heart clamp, 2-a locking nut, 3-a left taper nut, 4-a support shaft, 5-a right taper nut, 6-a floating expansion sleeve, 61-a floating end part, 62-a floating piece, 7-a part to be processed and 8-a handle.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
The utility model provides a coordinated type step hole internal expanding dabber anchor clamps for numerical control lathe, its structure is shown with figure 1, including back shaft 4, two tapering nuts of opposite screw thread interval installation on back shaft 4, and be used for rising the unsteady cover 6 that rises of fixed part 7 of treating processing, the both ends of the cover 6 that rises that floats are the unsteady tip 61 of external diameter telescopic, the inboard processing of unsteady tip 61 has the circular platform shape hole that matches with the tapering of tapering nut surface, and correspond respectively through two tapering nuts and stretch into the internal face in the circular platform shape hole that supports two unsteady tip 61, make unsteady cover 6 fixed cover on back shaft 4 that rises.
Referring to fig. 1 again, the taper of the circular truncated cone holes on the two floating ends 61 of the floating expansion sleeve 6 is the same and keeps concentric.
Referring to fig. 1 again, the floating end 61 is composed of a plurality of floating pieces 62 arranged around the central axis of the floating expansion sleeve 6 at intervals, the inner surfaces of all the floating pieces 62 are matched to form a circular truncated cone-shaped hole, a locking nut 2 abutting against the outer end of one of the taper nuts (i.e. the left taper nut 3) is further mounted on the support shaft 4, a chicken heart clamp 1 is further fixedly arranged on one end of the support shaft 4 close to the locking nut 2, and a connecting rod connected with the spindle of the numerically controlled lathe is further arranged on the chicken heart clamp 1. In addition, a handle 8 piece for facilitating rotation is also mounted on the outer end face of the other taper nut (i.e. the right taper nut 5).
Referring to fig. 1 again, two mounting holes concentric with the central axis of the support shaft 4 are further formed on two end faces of the support shaft 4 to respectively match with the spindle center and the tailstock center for mounting.
Meanwhile, in order to ensure that the outer diameter of the floating end part 61 between the two conical nuts and the floating expansion sleeve 6 can be adjusted, during operation, the minimum diameter (namely when the floating end part 61 is not subjected to the tensioning force of the conical nuts) of the floating end part 61 is not larger than the diameter of the corresponding position of the inner hole of the part 7 to be processed, and the maximum diameter (namely when the floating end part 61 expands to the maximum degree) is larger than the diameter of the corresponding position of the inner hole of the part 7 to be processed. In addition, in order to ensure the installation effect, the diameter (corresponding position) of the inner hole of the part 7 to be processed is generally set to be slightly larger than the minimum diameter of the floating end part 61, so that the assembly is convenient, and the tensioning and fixing effect is not influenced.
When the clamp of the embodiment is in a specific process, the left taper nut 3 is adjusted to a set position on the supporting shaft 4, then the locking nut 2 is adjusted to abut against the left taper nut 3, so that the left taper nut is prevented from loosening, then the floating expansion sleeve 6 and the part 7 to be processed are assembled, then the floating expansion sleeve 6 is expanded by screwing in the right taper nut 5, as the two ends of the floating expansion sleeve 6 can float and are respectively matched with the two taper nuts, the simultaneous expansion and contraction of the two ends can be realized after vertical transmission, so that the two ends of the floating expansion sleeve 6 are respectively expanded or loosened with the part 7 to be processed, and the uniform and consistent tension force at the two ends can be ensured. At the moment, after the fixing is finished, the two mounting holes at the two ends of the supporting shaft 4 and the heart clamp 1 are assembled with the numerical control lathe, after the assembly, as shown in figure 2, the supporting shaft 4 is driven to rotate through the heart clamp 1, and because the supporting position of the clamp is completely arranged in the inner hole of the part to be processed 7, two end faces and the outer circle of the part can be simultaneously turned once, so that the very high parallelism of the two end faces and the very high verticality of the two end faces and the outer diameter are ensured.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (8)
1. The utility model provides a mandrel anchor clamps that rises in coordinated type step hole for numerical control lathe, its characterized in that, includes back shaft (4), two taper nuts of installing on back shaft (4) in opposite directions screw thread interval to and be used for rising the fixed cover (6) that rises that floats of waiting to process part (7), the both ends of the cover (6) that rises that floats are the unsteady tip (61) of external diameter telescopic, the inboard processing of the tip (61) that floats have with the round platform shape hole that the tapering of taper nut surface matches to correspond respectively through two taper nuts and stretch into the internal face in the round platform shape hole that supports two unsteady tips (61) for the cover (6) that rises that floats is fixed to be overlapped on back shaft (4).
2. The linkage type stepped hole internal expanding mandrel clamp for the numerical control lathe as claimed in claim 1, wherein the taper of the circular truncated cone-shaped holes on the two floating end portions (61) of the floating expanding sleeve (6) is the same and the circular truncated cone-shaped holes are concentric.
3. The linkage type stepped hole internal expanding mandrel clamp for the numerical control lathe as claimed in claim 1, wherein the floating end portion (61) is composed of a plurality of floating pieces (62) arranged around a central shaft of the floating expanding sleeve (6) at intervals, and inner surfaces of all the floating pieces (62) are matched to form the circular truncated cone-shaped hole.
4. The clamp for the linkage type stepped hole internal expansion mandrel for the numerical control lathe is characterized in that a locking nut (2) abutting against the outer end of one taper nut is further installed on the supporting shaft (4).
5. The linkage type stepped hole internal expansion mandrel clamp for the numerically controlled lathe as claimed in claim 4, wherein the supporting shaft (4) is further fixedly provided with a heart clamp (1) at one end close to the locking nut (2), and a connecting rod connected with a spindle of the numerically controlled lathe is further arranged on the heart clamp (1).
6. The linkage type stepped hole internal expansion mandrel clamp for the numerical control lathe as claimed in claim 4, wherein a handle (8) piece convenient for rotation is further mounted on the outer end face of the other taper nut.
7. The linkage type stepped hole internal expansion mandrel clamp for the numerical control lathe according to claim 1, wherein two mounting holes concentric with the central axis of the support shaft (4) are further processed on two end faces of the support shaft so as to be respectively matched with a main shaft tip and a tailstock tip for mounting.
8. The linkage type stepped hole internal expansion mandrel clamp for the numerical control lathe as claimed in claim 1, wherein in operation, the minimum diameter of the floating end part (61) is not larger than the diameter of the corresponding position of the inner hole of the part (7) to be machined, and the maximum diameter is larger than the diameter of the corresponding position of the inner hole of the part (7) to be machined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811276884.8A CN111112668A (en) | 2018-10-30 | 2018-10-30 | Linkage type step hole internal expansion mandrel fixture for numerical control lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811276884.8A CN111112668A (en) | 2018-10-30 | 2018-10-30 | Linkage type step hole internal expansion mandrel fixture for numerical control lathe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111112668A true CN111112668A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811276884.8A Pending CN111112668A (en) | 2018-10-30 | 2018-10-30 | Linkage type step hole internal expansion mandrel fixture for numerical control lathe |
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| Country | Link |
|---|---|
| CN (1) | CN111112668A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114226776A (en) * | 2021-12-30 | 2022-03-25 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Auxiliary clamping device for turning sheet thin-wall parts and machining method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203610708U (en) * | 2013-12-25 | 2014-05-28 | 于占江 | Tool clamp for machining end surface of conical drum-like parts |
| CN104400051A (en) * | 2014-10-30 | 2015-03-11 | 无锡职业技术学院 | Combined-type variable-diameter core-shaft clamp for machining |
| CN104439359A (en) * | 2013-09-12 | 2015-03-25 | 西安志越机电科技有限公司 | External thread turning fixture of thin-wall sleeve |
| CN205869505U (en) * | 2016-07-15 | 2017-01-11 | 郑州飞机装备有限责任公司 | Simultaneous processing motor both sides tang is with set anchor clamps that rise |
| CN207086948U (en) * | 2017-07-31 | 2018-03-13 | 田中金属加工（上海）有限公司 | A kind of combined type for numerically controlled lathe is adjustable internal expanding dabber clamp |
| CN209062178U (en) * | 2018-10-30 | 2019-07-05 | 田中金属加工（上海）有限公司 | Coordinated type stepped hole internal expanding dabber clamp for numerically controlled lathe |
-
2018
- 2018-10-30 CN CN201811276884.8A patent/CN111112668A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439359A (en) * | 2013-09-12 | 2015-03-25 | 西安志越机电科技有限公司 | External thread turning fixture of thin-wall sleeve |
| CN203610708U (en) * | 2013-12-25 | 2014-05-28 | 于占江 | Tool clamp for machining end surface of conical drum-like parts |
| CN104400051A (en) * | 2014-10-30 | 2015-03-11 | 无锡职业技术学院 | Combined-type variable-diameter core-shaft clamp for machining |
| CN205869505U (en) * | 2016-07-15 | 2017-01-11 | 郑州飞机装备有限责任公司 | Simultaneous processing motor both sides tang is with set anchor clamps that rise |
| CN207086948U (en) * | 2017-07-31 | 2018-03-13 | 田中金属加工（上海）有限公司 | A kind of combined type for numerically controlled lathe is adjustable internal expanding dabber clamp |
| CN209062178U (en) * | 2018-10-30 | 2019-07-05 | 田中金属加工（上海）有限公司 | Coordinated type stepped hole internal expanding dabber clamp for numerically controlled lathe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114226776A (en) * | 2021-12-30 | 2022-03-25 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Auxiliary clamping device for turning sheet thin-wall parts and machining method |
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