Multi-stage expansion mandrel with intelligent detection function

Abstract

The invention relates to the technical field of lathe mandrels, in particular to a multi-stage expansion mandrel with an intelligent detection function. According to the technical scheme, a main shaft is included, a cylinder barrel is arranged on the outer ring of one end of the main shaft, a cylinder cover is arranged between the cylinder barrel and the main shaft, three sets of oil pipe joints are arranged on the cylinder barrel, more than three sets of expansion shafts are arranged at the position, located on the inner ring of the cylinder barrel, of one end of the main shaft, and an expansion assembly is arranged at the top end of each set of expansion shafts. The outer rings of the top ends of the expansion shafts are sleeved with nuts. The multi-stage expansion shaft and the multi-stage expansion assembly are matched with each other, so that workpieces with different inner diameters can be clamped and assembled, the replacement frequency of the expansion mandrel is avoided during multi-product operation, the production efficiency is improved, an operator can quickly disassemble, assemble and replace the expansion assembly through the arrangement of the nut, and the labor intensity of the operator is reduced. And subsequent daily overhaul and maintenance of the device are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of lathe mandrels, and in particular to a multi-stage expansion mandrel with an intelligent detection function. Background Art

[0002] Lathe is a widely used metal processing equipment, mainly used for rotating workpieces to complete a variety of processing operations such as turning, milling, drilling, tapping, etc. Lathes can accurately process parts of various shapes by fixing the workpiece and rotating it while cutting with tools, especially suitable for processing circular or symmetrical workpieces.

[0003] When a circular workpiece needs to be processed, the inner hole of the workpiece needs to be clamped. The expansion mandrel is a fixture tool used in lathe processing, and is particularly suitable for workpieces that need to clamp inner holes. It uses the expansion principle to clamp the workpiece through changes in the internal and external mechanical structures, thereby ensuring the stability and precision of the workpiece during the turning process. Most of the expansion mandrels in the prior art are single-step shaped and have a small scope of application. In multi-product operations, expansion mandrels of various specifications need to be manufactured. When used for products beyond the scope, the expansion mandrel also needs to be replaced, which results in a high replacement frequency and greatly reduces operating efficiency. To this end, we specially propose a multi-stage expansion mandrel with intelligent detection function. Summary of the invention

[0004] The purpose of the present invention is to address the problems existing in the background technology and to provide a multi-stage expansion mandrel with an intelligent detection function.

[0005] The technical solution of the present invention is as follows: a multi-stage expansion core shaft with an intelligent detection function comprises a main shaft, a cylinder is arranged on the outer ring of one end of the main shaft, a cylinder cover is arranged between the cylinder and the main shaft, three groups of oil pipe joints are arranged on the cylinder, one end of the main shaft is located at the inner ring of the cylinder and three groups of expansion shafts are arranged, an expansion assembly is arranged at the top of each group of expansion shafts, each group of expansion assemblies comprises a sliding cone installed at the top of a corresponding group of expansion shafts, a thrust bearing 1 is arranged on the inner side of the sliding cone, an expansion sleeve is arranged on the outer ring of the sliding cone, two groups of springs are arranged on the outer ring of the expansion sleeve, a thrust bearing 2 is arranged on one side of the expansion sleeve, and a nut is arranged on the top outer ring of a group of expansion shafts.

[0006] Preferably, the inner ring of the cylinder head is installed correspondingly to the outer ring of the main shaft, an O-ring 1 is arranged between the inner ring of the cylinder head and the main shaft, one end of the cylinder barrel is installed correspondingly to one side of the cylinder head, and an O-ring 2 is arranged between one side of the cylinder head and the cylinder barrel.

[0007] Preferably, the inner ring of the cylinder is installed correspondingly to the outer ring of the main shaft, multiple groups of O-rings are arranged between the cylinder and the main shaft, multiple groups of mounting holes are opened on the cylinder, and the oil pipe joints are installed correspondingly to the mounting holes.

[0008] Preferably, the three groups of expansion shafts are respectively the first mandrel, the second mandrel and the third mandrel, the second mandrel is sleeved on the outside of the first mandrel, the third mandrel is sleeved on the outside of the second mandrel, the length of the first mandrel is greater than the length of the second mandrel, the length of the second mandrel is greater than the length of the third mandrel, and the multiple groups of oil pipe joints correspond to the first mandrel, the second mandrel and the third mandrel, respectively, with oil passages reserved between them.

[0009] Preferably, the sliding cone is arranged in a cone shape, a sealing rubber ring 1 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 thrust bearing 1 is installed corresponding to the inner side of the sliding cone, and a sealing rubber ring 2 is arranged between the thrust bearing 1 and the sliding cone.

[0010] Preferably, the inner side of the expansion sleeve and the outer side of the sliding cone are in contact with each other, and two groups of mounting grooves are provided on the outer circumference of the expansion sleeve, and the spring is installed corresponding to the mounting grooves.

[0011] Preferably, a connecting ring is provided on one side of each group of expansion sleeves, the inner ring of the connecting ring is installed corresponding to the outer ring of a corresponding group of expansion shafts, a sealing gasket is provided between the connecting ring and the expansion shaft, one side of the connecting ring is provided in the shape of an inner groove, the mounting end of the thrust bearing 2 is installed corresponding to the inner wall of the groove on the connecting ring, and a dust ring is provided between the inner ring of the thrust bearing 2 and the corresponding group of expansion shafts.

[0012] Preferably, each group of the sliding cones and expansion sleeves is provided with a pressure sensor, each group of the sliding cones is provided with a laser displacement sensor, and the inner diameters of the three groups of expansion assemblies corresponding to the three groups of expansion shafts are arranged in a decreasing shape.

[0013] Preferably, the top outer ring of the first mandrel is provided with threads, the nut is installed corresponding to the top of the first mandrel, and one side of the nut is fitted with one side of the sliding cone of the outer ring of the first mandrel.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] The overall structure of the present invention is simple. Through the multi-level expansion shaft and expansion assembly that cooperate with each other, it can be adapted to clamp and assemble workpieces with different inner diameters. When operating multiple products, the frequency of replacing the expansion core shaft is avoided, thereby improving production efficiency. At the same time, through the setting of multiple groups of oil pipe joints, the operator can operate different expansion shafts and expansion assemblies separately, thereby avoiding waste of resources. Through the setting of the nut, the operator can quickly disassemble and replace the expansion assembly, which is beneficial to the subsequent daily inspection and maintenance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 Figure 1 A schematic diagram of the structure enlargement in the middle;

[0018] Figure 3 Figure 1 Schematic diagram of the structure of some areas.

[0019] Figure numerals: 1. main shaft; 2. cylinder barrel; 3. cylinder head; 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. dust ring. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Example

[0022] like Figure 1-3As shown, a multi-stage expansion mandrel with intelligent detection function proposed by the present invention comprises a main shaft 1, a cylinder 2 is arranged on the outer ring of one end of the main shaft 1, the inner ring of the cylinder 2 is installed corresponding to the outer ring of the main shaft 1, a plurality of groups of O-rings 10 are arranged between the cylinder 2 and the main shaft 1, and the arrangement of the O-rings 10 can make the main shaft 1 and the cylinder 2 sealed, three groups of oil pipe joints 6 are arranged on the cylinder 2, a plurality of groups of mounting holes are provided on the cylinder 2, the oil pipe joints 6 are installed corresponding to the mounting holes, the mounting end of the oil pipe joint 6 is fixedly connected to the cylinder 2, the oil pipe joint 6 can be connected to the oil pipe, a cylinder cover 3 is arranged between the cylinder 2 and the main shaft 1, and the inner ring of the cylinder cover 3 is installed corresponding to the outer ring of the main shaft 1 The inner ring of the cylinder head 3 fits with the outer ring of the main shaft 1, an O-ring 8 is arranged between the inner ring of the cylinder head 3 and the main shaft 1, a ring groove 1 is provided on the inner ring of the cylinder head 3, and the O-ring 8 is installed corresponding to the ring groove 1. The setting of the O-ring 8 can make the cylinder head 3 and the main shaft 1 in a sealed state, one end of the cylinder barrel 2 is installed corresponding to one side of the cylinder head 3, a fastening bolt is provided on the side where the cylinder barrel 2 and the cylinder head 3 are close to each other, and the cylinder barrel 2 and the cylinder head 3 are fixed by the fastening bolts, an O-ring 2 9 is arranged between one side of the cylinder head 3 and the cylinder barrel 2, a ring groove 2 is provided on one side of the cylinder head 3, and the O-ring 2 9 is installed corresponding to the ring groove 2. The setting of the O-ring 2 9 can make the cylinder head 3 and the cylinder barrel 2 in a sealed state;

[0023] One end of the main shaft 1 is located at the inner ring of the cylinder 2 and is provided with three groups of expansion shafts 4. 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, and the outer side of the first core shaft 41 fits with the inner wall of the second core shaft 42. The third core shaft 43 is sleeved on the outer side of the second core shaft 42, and the inner side of the third core shaft 43 fits with 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, and the length of the second core shaft 42 is greater than the length of the third core shaft 43. The first mandrel 41, the second mandrel 42 and the third mandrel 43 of different lengths and inner diameters make the expansion mandrel be arranged in a multi-stage shape, and the multiple groups of oil pipe joints 6 correspond to the first mandrel 41, the second mandrel 42 and the third mandrel 43 respectively, and the multiple groups of oil pipe joints 6 can supply oil to the first mandrel 41, the second mandrel 42 and the third mandrel 43 separately, so that the first mandrel 41, the second mandrel 42 and the third mandrel 43 can be controlled separately, so as to better adapt to products of different specifications;

[0024] An expansion assembly 5 is provided at the top of each group of expansion shafts 4. 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 shape. The decreasing diameter arrangement of the three groups of expansion assemblies 5 can make the diameter produced by the expansion smaller, so that it can be suitable for more precise inner hole processing operations. Each group of expansion assemblies 5 includes a sliding cone 51 installed at the top of the corresponding group of expansion shafts 4. The sliding cone 51 is arranged in a cone shape. A sealing rubber ring 11 is arranged between the inner ring of the sliding cone 51 and the outer ring of the corresponding group of expansion shafts 4. The outer ring of the sealing rubber ring 11 is fixedly connected to the inner ring of the sliding cone 51. The inner ring of the sealing rubber ring 11 is fixedly connected to the outer ring of the corresponding group of expansion shafts 4. The arrangement of the sealing rubber ring 11 can reduce the sliding cone 51 and the expansion shaft 4. The friction between the expansion shaft 4, a thrust bearing 52 is arranged on the inner side of the sliding cone 51, and the mounting end of the thrust bearing 52 is installed corresponding to the inner side of the sliding cone 51, one end of the thrust bearing 52 is fixedly connected to the inner wall of the sliding cone 51, and the other end of the thrust bearing 52 is fixedly connected to the inner side of the connecting ring 13, a sealing rubber ring 2 12 is arranged between the thrust bearing 1 52 and the sliding cone 51, and a ring groove 3 is opened on the inner side of the sliding cone 51, and the sealing rubber ring 2 12 is installed corresponding to the ring groove 3. The setting of the sealing rubber ring 2 12 can ensure the sealing between the sliding cone 51 and the thrust bearing 1 52, and the outer ring of the sliding cone 51 is provided with an expansion sleeve 53, and each group of sliding cones 51 and expansion sleeves 53 are provided with a pressure sensor, and the sliding cone 51 The pressure sensor on the sliding cone 51 can detect the pressure value borne by the sliding cone 51 when it is in motion, and the pressure sensor on the expansion sleeve 53 can detect the pressure value borne by the expansion sleeve 53 when it is in an expanded 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, and avoid the sliding cone 51 and the expansion sleeve 53 from being damaged by excessive pressure when they are in operation. A laser displacement sensor is arranged on each group of the sliding cones 51, and the mounting end of the laser displacement sensor is fixedly connected to 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 that a suitable support component can be automatically matched, and at the same time, it can be based on By applying different pressures to the workpiece according to different inner diameters, the workpiece can be better adapted to the expansion component, greatly improving the efficiency of the inspection operation. The inner side of the expansion sleeve 53 fits with the outer side of the sliding cone 51, and the inner wall of the expansion sleeve 53 is arranged in a conical inclined surface. The sliding cone 51 can open the expansion sleeve 53 when moving through the expansion shaft 4, so as to better clamp the inner ring of the workpiece. A connecting ring 13 is arranged on one side of each group of expansion sleeves 53, and the inner ring of the connecting ring 13 is installed correspondingly to the outer ring of a corresponding group of expansion shafts 4. The inner ring of the connecting ring 13 fits with the outer ring of a group of expansion shafts 4. A sealing gasket 14 is arranged between the connecting ring 13 and the expansion shaft 4, and the inner ring of the sealing gasket 14 fits tightly with the outer ring of the expansion shaft 4.The outer ring of the sealing gasket 14 fits tightly with one side of the connecting ring 13. The setting 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 provided with two groups of springs 54. The outer periphery of the expansion sleeve 53 is provided with two groups of mounting grooves. The springs 54 are installed corresponding to the mounting grooves. The setting of the springs 54 can protect the expansion sleeve 53 when it is in a stretched state, thereby improving the strength of the expansion sleeve 53 and enabling the expansion sleeve 53 to better match the inner ring of the workpiece. A thrust bearing 2 55 is provided on one side of the expansion sleeve 53. One side of the connecting ring 13 is provided in the shape of an inner groove. The mounting end of the thrust bearing 2 55 is installed corresponding to the inner wall of the groove on the connecting ring 13. One side of the thrust bearing 2 55 is fixedly connected to the connecting ring 13. The other side of the thrust bearing 2 55 One side is fitted with the other side of the expansion sleeve 53, and the thrust bearing 2 55 is against the expansion sleeve 53. The setting of the thrust bearing 2 55 can leave a certain gap between the expansion sleeve 53 and the connecting ring 13, so as to ensure that the expansion sleeve 53 can be stably expanded. A dust ring 15 is arranged between the inner ring of the thrust bearing 2 55 and the corresponding group of expansion shafts 4. The setting of the dust ring 15 can ensure that the thrust bearing 2 55, the connecting ring 13 and the expansion shaft 4 are in a sealed state. The setting of the three groups of expansion components 5 and the expansion shaft 4 can make the expansion mandrel adapt to the clamping operation of workpieces with different specifications and inner diameters. The setting of the multi-stage expansion shaft 4 and the expansion component 5 can quickly adapt to the clamping and installation of workpieces of different sizes, avoiding the replacement operation of the expansion mandrel, and greatly improving the operation efficiency;

[0025] A nut 7 is provided on the top outer ring of a group of expansion shafts 4, a thread is provided on the top outer ring of the first core shaft 41, the nut 7 is installed corresponding to the top of the first core shaft 41, the nut 7 is threadedly connected to the top of the first core shaft 41, one side of the nut 7 is in contact with one side of the sliding cone 51 of the outer ring of the first core shaft 41, and the setting of the nut 7 can make multiple groups of expansion components 5 close to each other and abut against each other, thereby ensuring the stability of the expansion sleeve 53 when being stretched, and at the same time facilitating the operator to quickly disassemble, replace and overhaul the expansion component 5, thereby improving the working efficiency.

[0026] In this 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 sleeve to be installed on the outside of the expansion component 5 that meets the requirements according to the inner diameter value adaptation. At this time, the inner diameter of the workpiece and a group of expansion components 5 are mutually adapted. When the workpiece is placed, the operator supplies oil to the expansion shaft 4 corresponding to the current group of expansion components 5 through the oil pipe joint 6, so that the expansion shaft 4 starts to move, and the operation of the expansion shaft 4 drives the sliding cone 51 of the outer ring to follow the movement, and the movement of the sliding cone 51 pushes the expansion sleeve 53, so that The outer diameter of the expansion sleeve 53 expands and becomes larger, so that the outer ring of the expansion sleeve 53 fits with the inner ring of the workpiece. At the same time, the thrust bearing 1 52 and the thrust bearing 2 55 disperse and bear the axial loads on the expansion shaft 4, the sliding cone 51 and the expansion sleeve 53. The pressure sensors on the sliding cone 51 and the expansion sleeve 53 detect the pressure values ​​on the sliding cone 51 and the expansion sleeve 53, so that the sliding cone 51 and the expansion sleeve 53 are both within the set pressure value range. At this time, the expansion sleeve 53 firmly clamps the inner ring of the workpiece, thereby completing the clamping operation of the workpiece.

[0027] When the expansion assembly 5 does not fit the workpiece, the operator only needs to remove the nut 7 from the top of the first core shaft 41 by rotating the nut 7, so as to replace and assemble the expansion assembly 5 so that the expansion assembly 5 can fit the inner ring of the workpiece.

[0028] The above specific embodiment is only a preferred embodiment of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above embodiment, those skilled in the art can make various alternative improvements and combinations to the above specific embodiment.

Claims

1. A multi-stage expansion mandrel with intelligent detection function, comprising a main shaft (1), characterized in that: A cylinder barrel (2) is arranged on the outer ring of one end of the main shaft (1), a cylinder cover (3) is arranged between the cylinder barrel (2) and the main shaft (1), three groups of oil pipe joints (6) are arranged on the cylinder barrel (2), one end of the main shaft (1) is located in the inner ring of the cylinder barrel (2) and three groups of expansion shafts (4) are arranged, the top end of each group of expansion shafts (4) is provided with an expansion assembly (5), each group of expansion assembly (5) includes a sliding cone (51) installed on the top end of the corresponding group of expansion shafts (4), a thrust bearing 1 (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 arranged on the outer ring of the expansion sleeve (53), a thrust bearing 2 (55) is arranged on one side of the expansion sleeve (53), and a nut (7) is arranged on the top outer ring of one group of expansion shafts (4).

2. The multi-stage expansion mandrel with intelligent detection function according to claim 1, characterized in that: The inner ring of the cylinder head (3) is mounted correspondingly to the outer ring of the main shaft (1), an O-ring 1 (8) is arranged between the inner ring of the cylinder head (3) and the main shaft (1), one end of the cylinder barrel (2) is mounted correspondingly to one side of the cylinder head (3), and an O-ring 2 (9) is arranged between one side of the cylinder head (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 (2) is mounted correspondingly to the outer ring of the main shaft (1), a plurality of groups of O-rings (10) are arranged between the cylinder (2) and the main shaft (1), a plurality of groups of mounting holes are provided on the cylinder (2), and the oil pipe joint (6) is mounted correspondingly to 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 mandrel (41), a second mandrel (42) and a third mandrel (43); the second mandrel (42) is sleeved on the outside of the first mandrel (41); the third mandrel (43) is sleeved on the outside of the second mandrel (42); the length of the first mandrel (41) is greater than the length of the second mandrel (42); the length of the second mandrel (42) is greater than the length of the third mandrel (43); and the multiple groups of oil pipe joints (6) are respectively corresponding to the first mandrel (41), the second mandrel (42) and the third mandrel (43) and have oil passages reserved therebetween.

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 cone shape, and a sealing rubber ring (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 (52) is installed corresponding to the inner side of the sliding cone (51), and a sealing rubber ring (12) is arranged between the thrust bearing (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 fitted together, and two groups of mounting grooves are provided on the outer circumference of the expansion sleeve (53), and the spring (54) is installed corresponding to the mounting grooves.

7. The multi-stage expansion mandrel with intelligent detection function according to claim 1, characterized in that: A connecting ring (13) is provided on one side of each group of expansion sleeves (53); the inner ring of the connecting ring (13) is mounted correspondingly to the outer ring of a corresponding group of expansion shafts (4); a sealing gasket (14) is provided between the connecting ring (13) and the expansion shaft (4); one side of the connecting ring (13) is provided in the shape of an inner groove; the mounting end of the second thrust bearing (55) is mounted correspondingly to the inner wall of the groove on the connecting ring (13); a dust ring (15) is provided between the inner ring of the second thrust bearing (55) and the 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 cones (51) and the expansion sleeves (53) is provided with a pressure sensor, each group of the sliding cones (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 shape.

9. The multi-stage expansion mandrel with intelligent detection function according to claim 1, characterized in that: The top outer ring of the first core shaft (41) is provided with a thread, the nut (7) is installed corresponding to the top of the first core shaft (41), and one side of the nut (7) is in contact with one side of the sliding cone (51) of the outer ring of the first core shaft (41).

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