CN220533564U - Floating positioning device for cylindrical part - Google Patents
Floating positioning device for cylindrical part Download PDFInfo
- Publication number
- CN220533564U CN220533564U CN202321876698.4U CN202321876698U CN220533564U CN 220533564 U CN220533564 U CN 220533564U CN 202321876698 U CN202321876698 U CN 202321876698U CN 220533564 U CN220533564 U CN 220533564U
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- cylindrical part
- positioning unit
- bracket
- fixing seat
- positioning
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 238000003825 pressing Methods 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 abstract description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000009191 jumping Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model discloses a floating positioning device of a cylindrical part, which comprises: the first positioning unit is used for rolling fit with the circumferential surface of the cylindrical part, and the positioning reference of the first positioning unit is a fixed positioning reference; the second positioning unit is used for rolling fit with the peripheral surface of the cylindrical part, and is a floating type positioning unit; the first positioning unit and the second positioning unit are arranged oppositely. The utility model can ensure the stable movement of the cylindrical part in the rotating process.
Description
Technical Field
The utility model relates to the technical field of machine part manufacturing, in particular to a floating positioning device for a cylindrical part.
Background
In the machining manufacturing industry, the machining of any product is required to be achieved through different machining equipment, and the setting of the positioning reference of the machined product is a precondition for ensuring the quality of the machined product; accurate positioning reference setting is particularly important for large-scale products in enterprises.
In the machining industry, various centering devices are used and installed throughout various parts, but are less popular in the use of large-scale large-tonnage workpieces, i.e., have high cost digestion.
For example, for large single piece drum-like parts weighing approximately 95 tons, the challenge presented to designing a centering device is how to design a structure that can carry such weight. In order to solve the above problems, publication No. CN217045600U discloses a multi-roller automatic centering device, which not only can play a role in accurately and automatically centering large-sized cylindrical or shaft parts, but also is suitable for small-sized parts through the structures of a main bracket, a first roller frame, a second roller frame, a first roller, a second roller, a third roller and a fourth roller.
However, the above-mentioned automatic centering device only plays the role of how to support the part and how to center the part, but any part has errors in the manufacturing process, and deformation can be caused by the expansion and contraction of the part when the part is placed on the multi-roller automatic centering device, and when the part rotates, the part is jumped due to the errors or deformation of the part, so that the part cannot rotate stably. Thus, how to smooth out large parts during rotation is a current problem.
Disclosure of Invention
The utility model provides a floating positioning device for a cylindrical part, which can ensure that the cylindrical part stably moves in the rotating process.
A floating positioning device for a cylindrical part, comprising:
the first positioning unit is used for rolling fit with the circumferential surface of the cylindrical part, and the positioning reference of the first positioning unit is a fixed positioning reference;
the second positioning unit is used for rolling fit with the peripheral surface of the cylindrical part, and is a floating type positioning unit;
the first positioning unit and the second positioning unit are arranged oppositely.
In the utility model, the first positioning unit and the second positioning unit are respectively arranged at two sides of the cylindrical part and respectively rub with the cylindrical part in a rolling way, so that the first positioning unit and the second positioning unit have a clamping effect on the cylindrical part, when the cylindrical part rotates around the axis line of the cylindrical part, the first positioning unit and the second positioning unit form a limit on the cylindrical part, and when the precision of the peripheral surface of the cylindrical part is insufficient due to processing or other factors, the positioning reference of the first positioning unit is a fixed positioning reference, the second positioning unit is a floating positioning unit, the positioning reference of the first positioning unit does not change, and the second positioning unit can move along with the change of the peripheral surface of the cylindrical part, therefore, the first positioning unit and the second positioning unit always form a retaining effect on the cylindrical part, so that the cylindrical part is prevented from jumping in the rotating process due to error or deformation, and the cylindrical part is enabled to rotate stably.
Drawings
FIG. 1 is a schematic view of a floating positioning device for cylindrical parts.
Fig. 2 is a schematic structural diagram of the first positioning unit.
Fig. 3 is a schematic structural diagram of the second positioning unit.
Fig. 4 is a cross-sectional view of a portion of the second positioning unit.
The reference symbols in the drawings:
the device comprises a first positioning unit A, a second positioning unit B, a cylindrical part C, a first fixing seat 1, a first bracket 2, a first pinch roller 3, a guide rod 10, a spring 11, a second bracket 12, a second pinch roller 13, a second fixing seat body 14, a threaded hole 14a, a yielding hole 14B, a movable base plate 15, an adjusting pad 15a, an adjusting bolt 16, a retaining nut 17 and a linear displacement sensor 18.
Detailed Description
The utility model will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1 to 4, the floating positioning device of the cylindrical part of the present embodiment includes a first positioning unit a for rolling fit with the circumferential surface of the cylindrical part C, and a second positioning unit B for rolling fit with the circumferential surface of the cylindrical part C, wherein the positioning reference of the first positioning unit a is a fixed positioning unit; the second positioning unit B is a floating positioning unit, and the first positioning unit A and the second positioning unit B are oppositely arranged. The cylindrical part C may be a cylindrical part or a shaft part.
In the utility model, the first positioning unit A and the second positioning unit B are respectively arranged at two sides of the cylindrical part C, and the first positioning unit A and the second positioning unit B respectively perform rolling friction with the cylindrical part C, so that the first positioning unit A and the second positioning unit B have clamping effect on the cylindrical part C, when the cylindrical part C rotates around the axis line of the cylindrical part C, the first positioning unit A and the second positioning unit B form restriction on the cylindrical part C, and when the precision of the peripheral surface of the cylindrical part C is insufficient due to processing or other factors, the positioning reference of the first positioning unit A is a fixed positioning reference, the second positioning unit B is a floating positioning unit, the positioning reference of the first positioning unit A does not change, and the second positioning unit B moves along with the change of the peripheral surface of the cylindrical part C, so that the first positioning unit A and the second positioning unit B always have retaining effect on the cylindrical part C, and the cylindrical part C is prevented from jumping in rotation caused by errors or deformation, and the cylindrical part C is enabled to rotate stably.
The first positioning unit A comprises a first fixing seat 1, a first support 2 and a first pressing wheel 3 in rolling fit with the peripheral surface of the cylindrical part C, the first support 2 is fixed with the first fixing seat 1, and the first pressing wheel 3 is rotatably arranged on the first support 2. After the cylindrical part C is placed on the multi-roller automatic centering device (not shown in the figure), the multi-roller automatic centering device preferably adopts the multi-roller automatic centering device disclosed in CN217045600U, the cylindrical part C is matched with the first pressing wheel 3, and the first pressing wheel 3 forms a positioning reference for the cylindrical part C, that is, the cylindrical part C cannot move under the limitation of the first positioning unit a.
The second positioning unit B comprises a second fixing seat, a guide rod 10, a spring 11, a second bracket 12 and a second pressing wheel 13 which are in rolling fit with the peripheral surface of the cylindrical part C, one end of the guide rod 10 is connected with the second fixing seat, the other end of the guide rod 10 is matched with the second bracket 12, one end of the guide rod 10 is fixedly connected with the second fixing seat, an assembly hole is formed in the second bracket 12, and after the other end of the guide rod 10 passes through the assembly hole and is in sliding fit with the second bracket 12, a locking nut is adopted to fix the other end of the guide rod 10. The spring 11 is sleeved on the guide rod 10, one end of the spring 11 abuts against the second fixing seat, the other end of the spring 11 abuts against the second bracket 12, and the second pinch roller 13 is rotatably installed on the second bracket 12.
The number of the guide rods 10 is 4, and each guide rod 10 is provided with one spring 11, so that the number of the springs 11 is also 4, in this embodiment, the springs 11 preferably adopt belleville springs, and a certain precompression force is generated by adjusting the compression amount of the belleville springs, and the reaction force of the belleville springs acts on the cylindrical part C through the second pressing wheel 13, so that the cylindrical part C always bears a certain external force in the radial direction, and the cylindrical part C is pressed against the first positioning unit a. Various errors generated during the operation of the cylindrical part C can be counteracted by the expansion and contraction of the spring 11.
The second fixing seat comprises a second fixing seat body 14 and a movable base plate 15, one end of the guide rod 10 is fixed with the second fixing seat body 14, the movable base plate 15 is sleeved on the guide rod 10, and one end of the spring 11 abuts against the movable base plate 15. The second positioning unit B further comprises an adjusting bolt 16 for adjusting the pressure of the spring 11, the adjusting bolt 16 is in threaded connection with the second fixing seat body 14, and the adjusting bolt 16 is matched with the movable base plate 15.
The pre-compression force of the spring 11 can be adjusted as required by means of an adjusting screw 16. According to the method for adjusting the pre-pressing force of the springs 11, the size of the pressing force is firstly determined according to the requirement of the cylindrical part C, then the proper spring 11 specification is selected, the rigidity of the spring group and the compression amount of the springs 11 corresponding to the pre-pressing force are calculated, the adjusting bolt 16 is screwed down, the bolt 16 pushes the movable base plate 15 to compress the springs 11, then an adjusting pad 15a with the thickness equal to the compression amount required by the design of the belleville springs is inserted between the movable base plate 15 and the second fixed base body 14, and then the adjusting bolt 16 is loosened.
One end of the second fixing seat body 14 is provided with a threaded hole 14a, the peripheral surface of the second fixing seat body 14 is provided with a yielding hole 14b communicated with the threaded hole 14a, and the adjusting bolt 16 is in threaded connection with the threaded hole 14a after entering the yielding hole 14 b. This configuration facilitates the installation of the adjustment bolt 16.
The anti-back nut 17 is positioned at the orifice of the threaded hole 14a and is fixed with the second fixing seat body 14, and the center of the anti-back nut 17 and the center of the threaded hole 14a are positioned on the same straight line. By the retaining nut 17, the size of the threaded fit of the adjusting bolt 16 is increased, and the resistance of the adjusting bolt 16 to the spring 11 is improved.
In order to detect the stability of the device during movement, the second positioning unit B further includes a linear displacement sensor 18, one end of the linear displacement sensor 18 is connected to the second fixing base, and the other end of the linear displacement sensor 18 is connected to the second bracket 12.
For example, when the cylindrical part C generates an extrusion force on the second positioning unit B, the second bracket 12 compresses the spring 11 and moves in the direction of the second fixing seat, at this time, the second bracket 12 drives the linear displacement sensor 18 to displace, the linear displacement sensor 18 can detect the horizontal displacement generated during the operation of the device in real time, in order to ensure the long-term stable operation of the device, the allowable maximum displacement value can be set in the electrical control program, and when the displacement detected by the linear displacement sensor 18 exceeds the set value, an alarm signal is sent out to sense the failure of the device in advance.
The floating positioning device has the following advantages:
(1) Considering that one side of the cylindrical part C needs to be fixed, the other side needs to float and needs to have certain pressing force as a reference for the operation of the cylindrical part C, so that the cylindrical part C is always clung to the fixed end, the jumping requirement caused by the manufacturing and assembling errors of equipment can be met, the deformation requirement of the cylindrical part C in the thermal expansion and contraction process can be met, and the additional stress of the cylindrical part C in the operation process is avoided.
(2) The pre-pressing force can be adjusted according to the requirements, and the operation is simple and convenient.
(3) The device is provided with a linear displacement sensor, so that the running state of the equipment can be detected in real time, and an alarm signal is sent out when an abnormality occurs.
Claims (7)
1. The utility model provides a floating positioning device of cylindrical part which characterized in that includes:
the first positioning unit (A) is used for rolling fit with the peripheral surface of the cylindrical part (C), and the positioning reference of the first positioning unit (A) is a fixed positioning reference;
the second positioning unit (B) is used for rolling fit with the peripheral surface of the cylindrical part (C), and the second positioning unit (B) is a floating positioning unit;
the first positioning unit (A) and the second positioning unit (B) are arranged opposite to each other.
2. The floating positioning device of the cylindrical part according to claim 1, wherein the first positioning unit comprises a first fixing seat (1), a first bracket (2) and a first pressing wheel (3) in rolling fit with the peripheral surface of the cylindrical part (C), the first bracket (2) is fixed with the first fixing seat (1), and the first pressing wheel (3) is rotatably mounted on the first bracket (2).
3. The floating positioning device of the cylindrical part according to claim 1, wherein the second positioning unit (B) comprises a second fixing seat, a guide rod (10), a spring (11), a second bracket (12) in rolling fit with the peripheral surface of the cylindrical part (C), and a second pressing wheel (13), one end of the guide rod (10) is connected with the second fixing seat, the other end of the guide rod (10) is matched with the second bracket (12), the spring (11) is sleeved on the guide rod (10), one end of the spring (11) abuts against the second fixing seat, the other end of the spring (11) abuts against the second bracket (12), and the second pressing wheel (13) is rotatably installed on the second bracket (12).
4. A floating positioning device for cylindrical parts according to claim 3, characterized in that the second fixed seat comprises a second fixed seat body (14) and a movable base plate (15), one end of the guide rod (10) is fixed with the second fixed seat body (14), the movable base plate (15) is sleeved on the guide rod (10), and one end of the spring (11) is propped against the movable base plate (15);
the second positioning unit (B) further comprises an adjusting bolt (16) for adjusting the pressure of the spring (11), the adjusting bolt (16) is in threaded connection with the second fixing seat body (14), and the adjusting bolt (16) is matched with the movable base plate (15).
5. The floating positioning device for the cylindrical part according to claim 4, wherein one end of the second fixing seat body (14) is provided with a threaded hole (14 a), a yielding hole (14 b) communicated with the threaded hole (14 a) is formed in the peripheral surface of the second fixing seat body (14), and the adjusting bolt (16) is in threaded connection with the threaded hole (14 a) after entering the yielding hole (14 b).
6. The floating positioning device of a cylindrical part according to claim 5, further comprising a retaining nut (17), wherein the retaining nut (17) is located at an orifice of the threaded hole (14 a) and is fixed to the second fixing base body (14), and a center of the retaining nut (17) is located on the same line as a center of the threaded hole (14 a).
7. A floating positioning device for cylindrical parts according to claim 3, characterized in that the second positioning unit (B) further comprises a linear displacement sensor (18), one end of the linear displacement sensor (18) being connected to the second fixing base, the other end of the linear displacement sensor (18) being connected to the second bracket (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321876698.4U CN220533564U (en) | 2023-07-18 | 2023-07-18 | Floating positioning device for cylindrical part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321876698.4U CN220533564U (en) | 2023-07-18 | 2023-07-18 | Floating positioning device for cylindrical part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220533564U true CN220533564U (en) | 2024-02-27 |
Family
ID=89969937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321876698.4U Active CN220533564U (en) | 2023-07-18 | 2023-07-18 | Floating positioning device for cylindrical part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220533564U (en) |
-
2023
- 2023-07-18 CN CN202321876698.4U patent/CN220533564U/en active Active
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