Simple boring bar deflection adjusting device
By designing a circular cavity, tensile compensation mechanism and elastic impact resistance mechanism on the boring bar body, the problem of flexural deformation caused by the boring bar in the CNC floor boring and milling machine is solved, and the rigidity and machining accuracy of the boring bar are improved.
Patent Information
- Application Number
- CN202510043270.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-04-11
AI Technical Summary
The boring bar will cause flexural deformation during the operation of the CNC floor boring and milling machine, resulting in angular errors and displacement errors of the machine tool spindle and tool, affecting the machining accuracy.
A simple device for adjusting the boring bar deflection is designed, including setting a circular cavity, a tension compensation mechanism and an elastic impact resistance mechanism on the boring bar body. Through the coordinated work of these structures, the deformation of the boring bar when stretching, neutralizes the sinking and deflection deformation of the boring bar.
Effectively strengthen the rigidity of the boring bar body, reduce the adverse impact of deformation on geometric accuracy during stretching, ensure the geometric accuracy and machining accuracy of the boring bar, and solve the problems of machine tool spindle and tool angle error and displacement error caused by boring bar flexural deformation.
Smart Images
Figure CN119794410A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of boring bars, in particular to a simple device for adjusting the deflection of a boring bar. Background Art
[0002] Since the boring bar and square slide of large CNC floor-standing boring and milling machines have a large mass and are in an overhanging state, the larger the working stroke, the greater the maximum overhang.
[0003] During the operation of a CNC floor-standing boring and milling machine, the boring bar will inevitably bend and deform during the extension process, causing angular error and displacement error of the machine tool spindle and tool, thereby affecting the machining accuracy of the machine tool; in response to this, the inventor proposes a simple device for adjusting the deflection of the boring bar, aiming to solve the above-mentioned boring bar deflection problem. Summary of the invention
[0004] The purpose of the present invention is to provide a simple device for adjusting the deflection of a boring bar, which is used to solve the problem in the prior art that the boring bar will bend when extended, resulting in spindle and tool angle and displacement errors, affecting the processing accuracy.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a simple device for adjusting the deflection of a boring bar, comprising a boring bar body, and also comprising two circular cavities arranged on the boring bar body and arranged at intervals, an annular mounting cavity arranged on one end inside the circular cavity, a front end cover arranged at one end of the boring bar body, a head cover arranged in the circular cavity, an annular protrusion arranged on the outer wall of the head cover and abutting against one end inside the annular mounting cavity, a ring sleeved on the head cover, a tension compensation mechanism arranged on the other end of the boring bar body, and an elastic anti-impact mechanism arranged inside the head cover and slidingly matched with the tension compensation mechanism, one end of the tension compensation mechanism passes through the head cover and is connected to the front end cover, the elastic anti-impact mechanism acts on the tension compensation mechanism, and the two ends of the ring respectively abut against the annular protrusion and one side of the front end cover.
[0006] Furthermore, one side of the front end cover is provided with mounting holes which are arranged on the same axial line as the two circular cavities; the tension compensation mechanism includes a servo cylinder which is arranged on the inner wall of the circular cavity and connected to the other end of the boring bar body, a pull rod connected to the output end of the servo cylinder, and a flange connected to one end of the pull rod, the flange is connected to the inside of the mounting hole, and the pull rod is slidably matched with the head cover.
[0007] Furthermore, a third cavity and a first cavity are respectively provided at both ends of the head cover, a second cavity connected to the third cavity and the first cavity is provided inside the head cover, the diameter of the third cavity is larger than the diameter of the first cavity, and the diameter of the first cavity is larger than the diameter of the second cavity; the pull rod includes a connecting rod connected to the output end of the servo cylinder, a fixing column connected to one end of the connecting rod and slidingly matched with the second cavity, an I-shaped cylinder connected to one end of the fixing column and located in the first cavity, and a connecting column connected to one end of the I-shaped cylinder and connected to the flange.
[0008] Furthermore, the elastic anti-impact mechanism includes a threaded sleeve threadedly matched with one end of the inner part of the third cavity, a plurality of annular pads sleeved on the pull rod and located in the third cavity, and a plurality of disc springs sleeved on the connecting rod and located between the annular pads and the threaded sleeve, and the threaded sleeve is slidably matched with the connecting rod.
[0009] Furthermore, an adjustment washer located in the first cavity is sleeved on the fixing column.
[0010] Compared with the prior art, the present invention has the following beneficial effects: The present invention aims to strengthen the rigidity of the boring bar body and weaken the adverse effect of its deformation on geometric accuracy during the extension process. The circular cavity designed on the boring bar body and the coordinated work of the integrated tension compensation mechanism, the head cover and the elastic anti-impact mechanism are used to compensate for the deformation of the boring bar body during extension, and the deflection sinking and bending deformation caused by its own weight and large span are neutralized, thereby ensuring the geometric accuracy and processing accuracy of the boring bar body; the boring bar body has the ability to correct the deflection bending deformation induced by a long extension length, a wide span and its own weight, thereby solving the problem of machine tool spindle and tool angle error and displacement error caused by the bending deformation of the boring bar, improving the accuracy of workpiece processing and the quality of the finished product, and its structural design is simple, reliability is excellent, operation is easy and the degree of automation is high. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a cross-sectional schematic diagram of a simple device for adjusting the deflection of a boring bar according to the present invention; Figure 2 For the present invention Figure 1 The enlarged schematic diagram of point A in the middle; Figure 3 It is a side view schematic diagram of a simple device for adjusting the deflection of a boring bar according to the present invention.
[0012] In the figure: 1. boring bar body; 2. circular cavity; 3. tension compensation mechanism; 4. servo cylinder; 5. pull rod; 6. head cover; 7. first cavity; 8. second cavity; 9. third cavity; 10. threaded sleeve; 11. annular gasket; 12. disc spring; 13. collar; 14. adjusting washer; 15. front end cover; 16. mounting hole; 17. flange; 18. annular mounting cavity; 19. annular protrusion; 20. fixing column; 21. I-shaped cylinder; 22. connecting column; 23. connecting rod. DETAILED DESCRIPTION
[0013] See also Figure 1-3 A simple device for adjusting the deflection of a boring bar comprises a boring bar body 1, two circular cavities 2 arranged on the boring bar body 1 and arranged at intervals, an annular mounting cavity 18 arranged on one end of the circular cavity 2, a front end cover 15 connected to one end of the boring bar body 1, a head cover 6 arranged in the circular cavity 2, an annular protrusion 19 connected to the outer wall of the head cover 6 and abutting against one end of the annular mounting cavity 18, a collar 13 sleeved on the head cover 6, a tension compensation mechanism 3 arranged on the other end of the boring bar body 1, and a front end cover 15 connected to one end of the boring bar body 1, a head cover 6 arranged in the circular cavity 2, an annular protrusion 19 connected to the outer wall of the head cover 6 and abutting against one end of the annular mounting cavity 18, a collar 13 sleeved on the head cover 6, a tension compensation mechanism 3 arranged on the other end of the boring bar body 1, and a front end cover 15 connected to one end of the boring bar body 1. The tension compensation mechanism 3 is a slidingly matched elastic anti-impact mechanism, one end of the tension compensation mechanism 3 passes through the head cover 6 and is connected to the front end cover 15, the elastic anti-impact mechanism acts on the tension compensation mechanism 3, and the two ends of the collar 13 are respectively abutted against the annular protrusion 19 and one side of the front end cover 15; after the head cover 6 is installed in the circular cavity 2, the annular protrusion 19 on the head cover 6 abuts against the annular installation cavity 18, and the head cover 6 is pressed and fixed to the circular cavity 2 through the cooperation of the collar 13 and the front end cover 15; in order to enhance the rigidity of the boring bar body 1, and In order to minimize the adverse effect of deformation on geometric accuracy during the extension process, two circular cavities 2 are arranged on the boring bar body 1, and the tension compensation mechanism 3 connected to the front end cover 15 is installed in the two circular cavities 2. As the boring bar body 1 is gradually extended, the tension provided by the tension compensation mechanism 3 is also increased. This tension causes the boring bar body 1 to produce a deformation opposite to the natural bending. At the same time, combined with the application of the elastic anti-impact mechanism, it can flexibly respond to impact loads and effectively compensate for the deformation of the boring bar body 1 when it is extended, thereby effectively offsetting the deflection sinking and flexural deformation caused by its own weight and large span, ensuring the geometric accuracy and processing accuracy of the boring bar body 1; furthermore, the boring bar body 1 has an adjustment function that can correct the deflection and bending deformation caused by a long extension length, a wide span and self-weight, thereby solving the problem of machine tool spindle and tool angle error and displacement error caused by the flexural deformation of the boring bar body 1, improving the accuracy of workpiece processing and the quality of the finished product, and its structural design is simple, reliability is excellent, operation is simple and automation is high.
[0014] One side of the front end cover 15 is provided with mounting holes 16 arranged on the same axis as the two circular cavities 2; the tension compensation mechanism 3 includes a servo cylinder 4 arranged on the inner wall of the circular cavity 2 and connected to the other end of the boring bar body 1, a pull rod 5 connected to the output end of the servo cylinder 4, and a flange 17 connected to one end of the pull rod 5, the flange 17 is connected to the inside of the mounting hole 16, and the pull rod 5 is slidably matched with the head cover 6; the third cavity 9 and the first cavity 7 are respectively provided at both ends of the head cover 6, and the second cavity 8 connected to the third cavity 9 and the first cavity 7 is provided inside the head cover 6, the diameter of the third cavity 9 is larger than the diameter of the first cavity 7, and the first cavity 7 is larger than the diameter of the first cavity 7. The diameter is greater than the diameter of the second cavity 8; the pull rod 5 includes a connecting rod 23 connected to the output end of the servo cylinder 4, a fixed column 20 connected to one end of the connecting rod 23 and slidingly matched with the second cavity 8, an I-shaped cylinder 21 connected to one end of the fixed column 20 and located in the first cavity 7, and a connecting column 22 connected to one end of the I-shaped cylinder 21 and connected to the flange 17; as the boring bar body 1 gradually extends, the pressure applied by the servo cylinder 4 gradually increases, thereby causing the pulling force of the pull rod 5 to continue to increase. The enhanced pulling force causes the boring bar body 1 to deform in the opposite direction of the natural bending direction, thereby correcting its bending.
[0015] The elastic anti-impact mechanism includes a threaded sleeve 10 threadedly matched with one end of the inner part of the third cavity 9, a plurality of annular pads 11 sleeved on the pull rod 5 and located in the third cavity 9, and a plurality of disc springs 12 sleeved on the connecting rod 23 and located between the annular pad 11 and the threaded sleeve 10. The threaded sleeve 10 and the connecting rod 23 are slidably matched. When the servo cylinder 4 applies a pulling force to the pull rod 5, the connecting rod 23 drives the fixed column 20 to move. Once the fixed column 20 comes into contact with the annular pad 11, the plurality of disc springs 12 will exert their anti-impact performance and show good flexibility to cope with the impact load. This can effectively compensate for the deformation of the boring bar body 1 during the extension process, ensuring that it can maintain high-precision operation under various working conditions.
[0016] An adjusting washer 14 located in the first cavity 7 is sleeved on the fixing column 20 ; the adjusting washer 14 can adjust the fixing column 20 in the longitudinal direction inside the first cavity 7 .
[0017] Working principle: In order to enhance the rigidity of the boring bar body 1 and minimize the adverse effects of deformation on geometric accuracy during the extension process, two circular cavities 2 are set on the boring bar body 1. The two circular cavities 2 are equipped with a tension compensation mechanism 3 connected to the front end cover 15. As the boring bar body 1 is gradually extended, the pressure applied by the servo cylinder 4 is gradually increased, thereby causing the tension of the pull rod 5 to continue to increase. This enhanced tension causes the boring bar body 1 to deform in the opposite direction of the natural bending direction, thereby correcting its bending. At the same time, when the servo cylinder 4 applies tension to the pull rod 5, the connecting rod 23 drives the fixed column 20 to move. Once the fixed column 20 and the annular pad 11 are in contact, the connecting rod 23 will drive the fixed column 20 to move. When the boring bar body 1 is in contact with the disc springs 12, the multiple disc springs 12 will exert their impact resistance performance, show good flexibility to cope with impact loads, and effectively compensate for the deformation of the boring bar body 1 when it is extended, thereby effectively offsetting the deflection sinking and bending deformation caused by its own weight and large span, and ensuring the geometric accuracy and processing accuracy of the boring bar body 1; furthermore, the boring bar body 1 has an adjustment function that can correct the deflection and bending deformation caused by a long extension length, a wide span and its own weight, thereby solving the problem of angular error and displacement error of the machine tool spindle and tool caused by the bending deformation of the boring bar body 1, and improving the accuracy of workpiece processing and the quality of the finished product. It has a simple structural design, excellent reliability, easy operation and a high degree of automation.
[0018] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A simple device for adjusting the deflection of a boring bar, comprising a boring bar body (1), characterized in that: The invention also comprises two circular cavities (2) arranged on the boring bar body (1) and arranged at intervals, an annular mounting cavity (18) arranged at one end of the circular cavity (2), a front end cover (15) arranged at one end of the boring bar body (1), a head cover (6) arranged in the circular cavity (2), an annular protrusion (19) arranged on the outer wall of the head cover (6) and abutting against one end of the annular mounting cavity (18), a collar (13) sleeved on the head cover (6), a tension compensation mechanism (3) arranged on the other end of the boring bar body (1), and an elastic anti-impact mechanism arranged inside the head cover (6) and slidably matched with the tension compensation mechanism (3), one end of the tension compensation mechanism (3) passes through the head cover (6) and is connected to the front end cover (15), the elastic anti-impact mechanism acts on the tension compensation mechanism (3), and the two ends of the collar (13) respectively abut against the annular protrusion (19) and one side of the front end cover (15).
2. A simple device for adjusting the deflection of a boring bar as claimed in claim 1, characterized in that: One side of the front end cover (15) is provided with mounting holes (16) arranged on the same axis as the two circular cavities (2); the tension compensation mechanism (3) comprises a servo cylinder (4) arranged on the inner wall of the circular cavity (2) and connected to the other end of the boring bar body (1), a pull rod (5) connected to the output end of the servo cylinder (4), and a flange (17) connected to one end of the pull rod (5); the flange (17) is connected to the inside of the mounting hole (16), and the pull rod (5) is slidably matched with the head cover (6).
3. A simple device for adjusting the deflection of a boring bar as claimed in claim 2, characterized in that: The head cover (6) is provided with a third cavity (9) and a first cavity (7) at both ends thereof, and a second cavity (8) communicating with the third cavity (9) and the first cavity (7) is provided inside the head cover (6). The diameter of the third cavity (9) is greater than the diameter of the first cavity (7), and the diameter of the first cavity (7) is greater than the diameter of the second cavity (8). The pull rod (5) comprises a connecting rod (23) connected to the output end of the servo cylinder (4), a fixing column (20) connected to one end of the connecting rod (23) and slidably matched with the second cavity (8), an I-shaped cylinder (21) connected to one end of the fixing column (20) and located in the first cavity (7), and a connecting column (22) connected to one end of the I-shaped cylinder (21) and connected to the flange (17).
4. A simple device for adjusting the deflection of a boring bar as claimed in claim 3, characterized in that: The elastic anti-impact mechanism comprises a threaded sleeve (10) threadably matched with one end of the interior of the third cavity (9), a plurality of annular pads (11) sleeved on the pull rod (5) and located in the third cavity (9), and a plurality of disc springs (12) sleeved on the connecting rod (23) and located between the annular pads (11) and the threaded sleeve (10); the threaded sleeve (10) and the connecting rod (23) are slidably matched.
5. A simple device for adjusting the deflection of a boring bar as claimed in claim 3, characterized in that: An adjustment washer (14) located in the first cavity (7) is sleeved on the fixing column (20).