Multi-stage expansion mandrel with intelligent detection function
By designing a multi-stage expansion mandrel and combining multiple sets of expansion shafts and expansion components, automatic detection and rapid adaptation of workpieces with different inner diameters are achieved, solving the problem of the limited applicability of existing expansion mandrels and improving production efficiency and ease of operation.
Patent Information
- Application Number
- CN202520025589.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-01-07
AI Technical Summary
Most existing expansion mandrels are single-step shaped, which has a limited range of applications and requires frequent replacement when operating multiple products, resulting in low operating efficiency.
Design a multi-stage expansion mandrel, comprising multiple sets of expansion shafts and expansion components, combined with oil pipe joints, sliding cones, thrust bearings, expansion sleeves and pressure sensors, to achieve adaptation and automatic detection of workpieces with different inner diameters.
The expansion mandrel has been improved in terms of its applicability, reduced the frequency of replacement, and increased production efficiency. It also enhances ease of operation through automatic detection and quick assembly/disassembly functions.
Smart Images
Figure CN223946840U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lathe mandrel technical field especially a kind of multi-stage expansion mandrel with intelligent detection function. BACKGROUND
[0002] Lathe is a kind of widely used metal processing equipment, mainly for rotating workpiece and carrying out various machining operations such as turning, milling, drilling, tapping, etc. Lathe can accurately process various shaped parts by fixing workpiece and rotating it, and cutting through tool, especially suitable for processing circular or symmetrical workpiece.
[0003] When circular workpiece needs to be processed, workpiece inner hole needs to be clamped, and expansion mandrel is a kind of fixture tool used in lathe machining, especially suitable for clamping inner hole workpiece. It uses expansion principle to clamp workpiece by changing inner and outer mechanical structure, so as to ensure the stability and accuracy of workpiece in turning process. The expansion mandrel in prior art is mostly single step, with small application range. When multi-product operation is needed, multiple specifications of expansion mandrel need to be made, and when out-of-range products are used, expansion mandrel needs to be replaced, so that the replacement frequency is high, which greatly reduces the operation efficiency. Therefore, a kind of multi-stage expansion mandrel with intelligent detection function is proposed. SUMMARY
[0004] The utility model aims at the problems in the background art, and proposes a kind of multi-stage expansion mandrel with intelligent detection function.
[0005] The utility model discloses a kind of multi-stage expansion mandrel with intelligent detection function, it includes spindle, the outer circle of one end of the spindle is provided with cylinder, cylinder and the outer circle of one end of the spindle is provided with cylinder cover, three groups of oil pipe joints are provided on the cylinder, the inner circle of one end of the spindle is located in the cylinder and is provided with multiple three groups of expansion shafts, the top of each group of expansion shafts is provided with expansion assembly, each group of expansion assembly includes the sliding cone body of being installed in the top of corresponding group of expansion shafts, the inner side of the sliding cone body is provided with thrust bearing one, the outer circle of the sliding cone body is provided with expansion sleeve, the outer circle of the expansion sleeve is provided with two groups of springs, expansion sleeve one side is provided with thrust bearing two, the outer circle of the top of one group of expansion shafts is provided with nut.
[0006] Preferably, the inner circle of the cylinder cover is correspondingly installed with the outer circle of the spindle, O-shaped ring one is arranged between the inner circle of the cylinder cover and the spindle, one end of the cylinder is correspondingly installed with one side of the cylinder cover, O-shaped ring two is arranged between one side of the cylinder cover and the cylinder.
[0007] Preferably, the inner ring of the cylinder corresponds to the outer ring of the main shaft, a plurality of O-rings are arranged between the cylinder and the main shaft, a plurality of mounting holes are arranged on the cylinder, and the oil pipe joint corresponds to the mounting hole.
[0008] Preferably, the three groups of expansion shafts are respectively a first core shaft, a second core shaft and a third core shaft, the second core shaft is sleeved outside the first core shaft, the third core shaft is sleeved outside the second core shaft, the length of the first core shaft is greater than the length of the second core shaft, the length of the second core shaft is greater than the length of the third core shaft, and a plurality of oil paths are respectively arranged between the oil pipe joints and the first core shaft, the second core shaft and the third core shaft.
[0009] Preferably, the sliding cone is arranged in a conical shape, a sealing rubber ring one is arranged between the inner ring of the sliding cone and the outer ring of a corresponding group of expansion shafts, the mounting end of the first thrust bearing corresponds to the inner side of the sliding cone, and a sealing rubber ring two is arranged between the first thrust bearing and the sliding cone.
[0010] Preferably, the inner side of the expansion sleeve and the outer side of the sliding cone are matched with each other, two groups of mounting grooves are arranged on the outer periphery of the expansion sleeve, and the spring corresponds to the mounting groove.
[0011] Preferably, one side of each group of expansion sleeves is provided with a connecting ring, the inner ring of the connecting ring corresponds to the outer ring of a corresponding group of expansion shafts, a sealing gasket is arranged between the connecting ring and the expansion shaft, one side of the connecting ring is arranged in an inner groove shape, the mounting end of the second thrust bearing corresponds to the inner wall of the groove on the connecting ring, and a dustproof ring is arranged between the inner ring of the second thrust bearing and a corresponding group of expansion shafts.
[0012] Preferably, a pressure sensor is arranged on each group of sliding cones and expansion sleeves, a laser displacement sensor is arranged on each group of sliding cones, and the inner diameters of the three groups of expansion assemblies corresponding to the three groups of expansion shafts are arranged in a decreasing manner.
[0013] Preferably, the outer ring of the top end of the first core shaft is provided with threads, the nut corresponds to the top end of the first core shaft, and one side of the nut is matched with one side of the sliding cone of the outer ring of the first core shaft.
[0014] Compared with the prior art, the utility model has the beneficial technical effects that:
[0015] The utility model discloses a whole simple structure can be adapted to the workpiece of different inner diameter size clamping assembly through the setting of the mutual cooperation of multistage expansion shaft and expansion assembly, avoided the replacement frequency of expansion mandrel when many product operations, improved production efficiency, can make operator can separately work to different expansion shaft and expansion assembly through the setting of multiple oil pipe joints, thereby avoided the waste of resources, can make operator can quickly dismouting and replacement of expansion assembly through the setting of nut, is favorable to the routine overhaul and maintenance of subsequent this device. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is whole structure schematic diagram of the utility model;
[0017] Figure 2 It is Figure 1 It is structure enlarged diagram of A place in the middle;
[0018] Figure 3 It is Figure 1 It is partial area structure schematic diagram in.
[0019] Sign significance: 1, main shaft;2, cylinder;3, cylinder cover;4, expansion shaft;41, first core shaft;42, second core shaft;43, third core shaft;5, expansion assembly;51, sliding cone;52, thrust bearing one;53, expansion sleeve;54, spring;55, thrust bearing two;6, oil pipe joint;7, nut;8, O ring one;9, O ring two;10, O ring three;11, sealing rubber ring one;12, sealing rubber ring two;13, connecting ring;14, sealing gasket;15, dustproof ring. DETAILED DESCRIPTION
[0020] The technical scheme of the utility model will be further explained below in connection with the drawings and specific embodiments.
[0021] EMBODIMENT
[0022] Such as Figures 1-3The utility model provides a multi -stage expansion core shaft with intelligent detection function, including the main shaft 1, the one end outer ring of main shaft 1 is provided with cylinder 2, the inner ring of cylinder 2 is installed with the outer ring of main shaft 1 corresponds, be provided with multiple O -ring three 10 between cylinder 2 and main shaft 1, the setting can make main shaft 1 and cylinder 2 between sealed, be provided with three groups of oil pipe joint 6 on cylinder 2, set up multiple mounting holes on cylinder 2, oil pipe joint 6 and mounting hole install correspondingly, the fixed connection of oil pipe joint 6's installation end and cylinder 2, oil pipe joint 6 can be connected with oil pipe, be provided with cylinder cover 3 between cylinder 2 and main shaft 1, the inner ring of cylinder cover 3 is installed with the outer ring of main shaft 1 corresponds, the inner ring of cylinder cover 3 and the outer ring of main shaft 1 mutually adhere, be provided with O -ring one 8 between the inner ring of cylinder cover 3 and main shaft 1, set up annular groove one in the inner ring of cylinder cover 3, O -ring one 8 and annular groove one install correspondingly, the setting can make cylinder cover 3 and main shaft 1 between sealed state, one end of cylinder 2 and one side of cylinder cover 3 install correspondingly, cylinder 2 and cylinder cover 3 mutually close one side is provided with fastening bolt, cylinder 2 and cylinder cover 3 are fixed through fastening bolt, be provided with O -ring two 9 between cylinder cover 3 one side and cylinder 2, set up annular groove two in cylinder cover 3 one side, O -ring two 9 and annular groove two install correspondingly, the setting can make cylinder cover 3 and cylinder 2 between sealed shape;
[0023] The one end of main shaft 1 is located in the inner ring of cylinder 2 and is provided with three groups of expansion shafts 4, the three groups of expansion shafts 4 are a first spindle 41, a second spindle 42 and a third spindle 43, the second spindle 42 is sleeved outside the first spindle 41, the outer side of the first spindle 41 and the inner wall of the second spindle 42 mutually adhere, the third spindle 43 is sleeved outside the second spindle 42, the inner side of the third spindle 43 and the outer side of the second spindle 42 mutually adhere, the length of the first spindle 41 is greater than the length of the second spindle 42, and the length of the second spindle 42 is greater than the length of the third spindle 43, and the different lengths and inner diameters of the first spindle 41, the second spindle 42 and the third spindle 43 make the expansion spindle be provided in a multi-stage manner, a plurality of oil pipe joints 6 are correspondingly provided with oil channels between the first spindle 41, the second spindle 42 and the third spindle 43, and the plurality of oil pipe joints 6 can be separately supplied with oil to the first spindle 41, the second spindle 42 and the third spindle 43, so that the first spindle 41, the second spindle 42 and the third spindle 43 can be controlled separately, and different specifications of products can be better adapted;
[0024] The top end of each group of expansion shafts 4 is provided with an expansion assembly 5, and the diameters of the three groups of expansion assemblies 5 are arranged in a decreasing manner corresponding to the inner diameters of the three groups of expansion shafts 4. The diameters of the three groups of expansion assemblies 5 are arranged in a decreasing manner, which can make the diameter generated by expansion smaller, so as to be applicable to more precise inner hole machining work. Each group of expansion assemblies 5 comprises a sliding cone 51 mounted at the top end of the corresponding group of expansion shafts 4. The sliding cone 51 is arranged in a conical shape. A sealing rubber ring I 11 is arranged between the inner circle of the sliding cone 51 and the outer circle of the corresponding group of expansion shafts 4. The outer circle of the sealing rubber ring I 11 is fixedly connected with the inner circle of the sliding cone 51. The inner circle of the sealing rubber ring I 11 is fixedly connected with the outer circle of the corresponding group of expansion shafts 4. The sealing rubber ring I 11 can reduce the friction between the sliding cone 51 and the expansion shaft 4. A thrust bearing I 52 is arranged on the inner side of the sliding cone 51. The mounting end of the thrust bearing I 52 is correspondingly mounted with the inner side of the sliding cone 51. One end of the thrust bearing I 52 is fixedly connected with the inner wall of the sliding cone 51. The other end of the thrust bearing I 52 is fixedly connected with the inner side of the connecting ring 13. A sealing rubber ring II 12 is arranged between the thrust bearing I 52 and the sliding cone 51. An annular groove III is formed in the inner side of the sliding cone 51. The sealing rubber ring II 12 is correspondingly mounted with the annular groove III. The sealing rubber ring II 12 can ensure the sealing between the sliding cone 51 and the thrust bearing I 52. The outer circle of the sliding cone 51 is provided with an expansion sleeve 53. A pressure sensor is arranged on each group of sliding cones 51 and expansion sleeves 53. The pressure sensor on the sliding cone 51 can detect the pressure value borne by the sliding cone 51 in the moving state. The pressure sensor on the expansion sleeve 53 can detect the pressure value borne by the expansion sleeve 53 in the open state. The arrangement of the pressure sensors on the sliding cone 51 and the expansion sleeve 53 can better protect the sliding cone 51 and the expansion sleeve 53, so as to avoid the damage caused by the excessive pressure borne by the sliding cone 51 and the expansion sleeve 53 in the working state. A laser displacement sensor is arranged on each group of sliding cones 51. The mounting end of the laser displacement sensor is fixedly connected with the end face of the sliding cone. The arrangement of the laser displacement sensor can scan and detect the inner diameter of the workpiece, so as to automatically match the appropriate supporting assembly. At the same time, different pressures can be applied to the workpiece according to different inner diameters, which can better adapt the workpiece to the expansion assembly, greatly improve the detection work efficiency. The inner side of the expansion sleeve 53 is in close contact with the outer side of the sliding cone 51. The inner wall of the expansion sleeve 53 is arranged in a conical inclined surface shape. The sliding cone 51 can open the expansion sleeve 53 when moving through the expansion shaft 4, so as to better clamp and stabilize the inner circle of the workpiece. One side of each group of expansion sleeves 53 is provided with a connecting ring 13. The inner circle of the connecting ring 13 is correspondingly mounted with the outer circle of the corresponding group of expansion shafts 4. The inner circle of the connecting ring 13 is in close contact with the outer circle of the group of expansion shafts 4. A sealing gasket 14 is arranged between the connecting ring 13 and the expansion shaft 4. The inner circle of the sealing gasket 14 is in close contact with the outer circle of the expansion shaft 4.The outer ring of the sealing gasket 14 is tightly attached to one side of the connecting ring 13, and the arrangement of the sealing gasket 14 can ensure the sealing between the connecting ring 13 and the expansion shaft 4. The outer ring of the expansion sleeve 53 is sleeved with two groups of springs 54, two groups of installation grooves are arranged on the outer periphery of the expansion sleeve 53, the springs 54 are installed in the installation grooves in a corresponding manner, the arrangement of the springs 54 can protect the expansion sleeve 53 when it is expanded, thereby improving the strength of the expansion sleeve 53, and the expansion sleeve 53 can better adapt to the inner ring of the workpiece. A thrust bearing two 55 is arranged on one side of the expansion sleeve 53, and the connecting ring 13 is arranged in an inner groove shape on one side. The installation end of the thrust bearing two 55 is installed in the inner wall of the groove of the connecting ring 13 in a corresponding manner. One side of the thrust bearing two 55 is fixedly connected with the connecting ring 13, and the other side of the thrust bearing two 55 is tightly attached to one side of the expansion sleeve 53. The thrust bearing two 55 abuts against the expansion sleeve 53. The arrangement of the thrust bearing two 55 can leave a gap between the expansion sleeve 53 and the connecting ring 13, thereby ensuring that the expansion sleeve 53 can be stably expanded. A dustproof ring 15 is arranged between the inner ring of the thrust bearing two 55 and the corresponding group of expansion shafts 4. The arrangement of the dustproof ring 15 can ensure that the thrust bearing two 55 is in a sealed state with the connecting ring 13 and the expansion shaft 4. The arrangement of the three groups of expansion assemblies 5 and the expansion shaft 4 can make the expansion mandrel adapt to workpiece clamping operations of different sizes of inner diameters. The arrangement of the multi-stage expansion shaft 4 and the expansion assembly 5 can quickly adapt to the clamping and installation of workpieces of different sizes, avoiding the replacement of the expansion mandrel and greatly improving the work efficiency.
[0025] The outer ring of the expansion shaft 4 is sleeved with a nut 7, and the outer ring of the first core shaft 41 is provided with a thread. The nut 7 is installed in a corresponding manner with the top end of the first core shaft 41, and the nut 7 is threadedly connected with the top end of the first core shaft 41. One side of the nut 7 is tightly attached to one side of the sliding cone 51 of the outer ring of the first core shaft 41. The arrangement of the nut 7 can make the multiple groups of expansion assemblies 5 tightly abut against each other on one side, thereby ensuring the stability of the expansion sleeve 53 when it is expanded, and facilitating the subsequent quick disassembly, replacement and maintenance of the expansion assembly 5 by the operator, thereby improving the work efficiency.
[0026] In the embodiment, when the operator needs to clamp the workpiece, the operator first scans and detects the inner diameter of the workpiece through the laser sensor, and then selects the expansion assembly 5 outside the required expansion assembly 5 according to the inner diameter value. At this time, the inner diameter of the workpiece is matched with a group of expansion assemblies 5. After the workpiece is placed, the operator supplies oil to the expansion shaft 4 corresponding to the current group of expansion assemblies 5 through the oil pipe joint 6, so that the expansion shaft 4 starts to move. The outer ring sliding cone 51 is driven to move, the sliding cone 51 moves to push the expansion sleeve 53, so that the outer diameter of the expansion sleeve 53 is expanded and enlarged, so that the outer ring of the expansion sleeve 53 is matched with the inner ring of the workpiece. At the same time, the thrust bearing one 52 and the thrust bearing two 55 simultaneously disperse and bear the axial load on the expansion shaft 4, the sliding cone 51 and the expansion sleeve 53. The pressure sensor on the sliding cone 51 and the expansion sleeve 53 detects the pressure value on the sliding cone 51 and the expansion sleeve 53, so that the sliding cone 51 and the expansion sleeve 53 are within the set pressure value range. At this time, the expansion sleeve 53 stably clamps the inner ring of the workpiece, so as to complete the clamping operation of the workpiece.
[0027] When the expansion assembly 5 is not matched with the workpiece, the operator only needs to rotate the nut 7 and remove the nut 7 from the top end of the first core shaft 41, so as to replace and assemble the expansion assembly 5, so that the expansion assembly 5 can be matched with the inner ring of the workpiece.
[0028] The above specific embodiments are only preferred embodiments of the present application. Based on the technical scheme of the present application and the related inspiration of the above embodiments, those skilled in the art can make various alternative improvements and combinations on the above specific embodiments.
Claims
1. A multi-stage expansion mandrel with intelligent detection function, comprising a main shaft (1), characterized in that: One end of the main shaft (1) is provided with a cylinder barrel (2), and the cylinder barrel (2) is provided with a cylinder cover (3) between the main shaft (1), three groups of oil pipe joints (6) are arranged on the cylinder barrel (2), and the one end of the main shaft (1) is located in the inner ring of the cylinder barrel (2) and is provided with three groups of expansion shafts (4), the top end of each group of expansion shafts (4) is provided with an expansion assembly (5), each group of expansion assemblies (5) comprises a sliding cone (51) mounted at the top end of a corresponding group of expansion shafts (4), a thrust bearing one (52) is arranged on the inner side of the sliding cone (51), an expansion sleeve (53) is arranged on the outer ring of the sliding cone (51), two groups of springs (54) are sleeved on the outer ring of the expansion sleeve (53), a thrust bearing two (55) is arranged on one side of the expansion sleeve (53), and the top end of one group of expansion shafts (4) is sleeved with a nut (7).
2. The multi-stage expansion mandrel with intelligent detection function according to claim 1, characterized in that, The inner ring of the cylinder cover (3) is correspondingly mounted with the outer ring of the main shaft (1), an O-shaped ring one (8) is arranged between the inner ring of the cylinder cover (3) and the main shaft (1), one end of the cylinder barrel (2) is correspondingly mounted with one side of the cylinder cover (3), and an O-shaped ring two (9) is arranged between one side of the cylinder cover (3) and the cylinder barrel (2).
3. The multi-stage expansion mandrel with intelligent detection function according to claim 1, characterized in that, The inner ring of the cylinder barrel (2) is correspondingly mounted with the outer ring of the main shaft (1), a plurality of O-shaped ring threes (10) are arranged between the cylinder barrel (2) and the main shaft (1), a plurality of mounting holes are formed in the cylinder barrel (2), and the oil pipe joints (6) are correspondingly mounted in the mounting holes.
4. The multi-stage expansion mandrel with intelligent detection function according to claim 1, characterized in that, The three groups of expansion shafts (4) are respectively a first core shaft (41), a second core shaft (42) and a third core shaft (43), the second core shaft (42) is sleeved on the outer side of the first core shaft (41), the third core shaft (43) is sleeved on the outer side of the second core shaft (42), the length of the first core shaft (41) is greater than the length of the second core shaft (42), the length of the second core shaft (42) is greater than the length of the third core shaft (43), and a plurality of oil channels are respectively formed between the first core shaft (41), the second core shaft (42) and the third core shaft (43).
5. The multi-stage expansion mandrel with intelligent detection function according to claim 1, characterized in that, The sliding cone (51) is arranged in a conical shape, a sealing rubber ring one (11) is arranged between the inner ring of the sliding cone (51) and the outer ring of a corresponding group of expansion shafts (4), the mounting end of the thrust bearing one (52) is correspondingly mounted with the inner side of the sliding cone (51), and a sealing rubber ring two (12) is arranged between the thrust bearing one (52) and the sliding cone (51).
6. The multi-stage expansion mandrel with intelligent detection function according to claim 1, characterized in that, The inner side of the expansion sleeve (53) and the outer side of the sliding cone (51) are mutually attached, two groups of mounting grooves are formed in the outer periphery of the expansion sleeve (53), and the springs (54) are correspondingly mounted in the mounting grooves.
7. The multi-stage expansion mandrel with intelligent detection function according to claim 1, characterized in that, Each group of the expansion sleeve (53) is provided with a connecting ring (13) on one side, the inner ring of the connecting ring (13) is correspondingly installed with the outer ring of a corresponding group of expansion shafts (4), a sealing gasket (14) is arranged between the connecting ring (13) and the expansion shaft (4), the connecting ring (13) is provided with an inner recess on one side, the mounting end of the second thrust bearing (55) is correspondingly installed with the inner wall of the recess on the connecting ring (13), and a dustproof ring (15) is arranged between the inner ring of the second thrust bearing (55) and a corresponding group of expansion shafts (4).
8. The multi-stage expansion mandrel with intelligent detection function according to claim 1, characterized in that, Each group of the sliding cone (51) and the expansion sleeve (53) is provided with a pressure sensor, each group of the sliding cone (51) is provided with a laser displacement sensor, and the inner diameters of the three groups of expansion assemblies (5) corresponding to the three groups of expansion shafts (4) are arranged in a decreasing manner.
9. The multi-stage expansion mandrel with intelligent detection function according to claim 4, characterized in that, The outer ring of the top end of the first mandrel (41) is provided with a thread, the nut (7) is correspondingly installed with the top end of the first mandrel (41), and one side of the nut (7) is mutually attached to one side of the sliding cone (51) of the outer ring of the first mandrel (41).