A kind of guiding device for processing wall thickness of super-long inner hole
The modular design of the guide device solves the problem of insufficient precision and adaptability of traditional guide devices in the machining of ultra-long inner holes, realizing an efficient and stable machining process and ensuring uniform wall thickness and equipment versatility.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIYUAN DINGXIN PRECISION FORGING CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional guiding devices struggle to balance precision and adaptability in machining ultra-long internal holes, resulting in hole wall scratches, wall thickness deviations, low machining efficiency, poor equipment compatibility, severe vibration, and a lack of real-time monitoring mechanisms, leading to a high scrap rate.
The modularly designed guide device, consisting of a guide section, an adjustment section, and a positioning section, is composed of threaded connections, elastic support rings, infrared sensors, and arc-shaped chip removal grooves. It enables precise control, real-time monitoring, and dynamic compensation, enhancing guiding accuracy and stability while reducing vibration and wear.
It significantly improves guiding accuracy and processing efficiency, reduces scrap rate, ensures uniform wall thickness and equipment versatility, enhances processing stability and equipment adaptability, and reduces processing errors caused by vibration and wear.
Smart Images
Figure CN224526573U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of internal hole processing technology, and in particular to a guide device for maintaining wall thickness during the processing of ultra-long internal holes. Background Technology
[0002] In the field of ultra-long internal hole machining, wall thickness uniformity is a core indicator determining product performance and lifespan. Existing technologies, traditional guiding devices suffer from the following significant drawbacks: First, the contradiction between machining accuracy and adaptability is prominent. In the machining of ultra-long internal holes, such as the manufacturing of key components like large hydraulic cylinder barrels and deep holes for wind turbine main shafts, traditional guiding devices struggle to balance accuracy and adaptability. Existing rigid guiding structures have rigid contact with the hole wall, which cannot accommodate the minute deformations of the workpiece caused by clamping stress and cutting heat. This easily leads to over- or under-positioning. Over-positioning causes scratches on the hole wall, damaging surface roughness, while under-positioning causes the tool feed trajectory to deviate, resulting in excessive wall thickness deviation and severely affecting product performance. Furthermore, traditional guide sleeves and the device body are often integrated designs, requiring the entire unit to be replaced when changing to different specifications. Firstly, the poor adaptability increases equipment costs and changeover time. Secondly, it significantly restricts processing efficiency and system stability. In the machining of ultra-long internal holes, the chip removal path is long and the resistance is high. The traditional straight groove chip removal structure easily causes chips to accumulate in the gap between the guide device and the hole wall, which not only increases cutting resistance but also wears the guide surface, forming a vicious cycle of wear, deviation, and more severe wear. At the same time, the existing device lacks a real-time monitoring mechanism and cannot detect the relative position of the hole wall and the tool online. When the wall thickness deviation exceeds the threshold, the machine must be stopped for inspection, resulting in a scrap rate of 5% to 8% in batch production. In addition, due to the large length-to-diameter ratio, the ultra-long guide device is prone to centrifugal vibration when rotating at high speed. The traditional connection method with the machine tool spindle cannot offset the vibration, limiting the machining speed and further restricting the processing efficiency. Utility Model Content
[0003] The purpose of this invention is to provide a guiding device for machining ultra-long inner holes while maintaining wall thickness, so as to solve the problems mentioned in the background art.
[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a guide device for machining ultra-long inner holes while maintaining wall thickness, comprising a guide section, a first threaded hole on the outer wall of the guide section, a guide sleeve on the outer surface of the guide section, a second threaded hole on the outer wall of the guide sleeve, and embedded bolts threadedly connected to both the first threaded hole and the second threaded hole, and an adjustment section fixedly connected to the end of the guide section.
[0005] As a further technical solution of this utility model, an arc-shaped chip removal groove is provided on the outer wall of the adjustment section, and a front annular mounting groove and a rear annular mounting groove are provided on the outer wall of the adjustment section, and a front support ring and a rear support ring are respectively sleeved on the front annular mounting groove and the rear annular mounting groove.
[0006] As a further technical solution of this utility model, an embedding groove is provided on one side of the outer wall of the adjustment section, and an infrared sensor is provided in the embedding groove.
[0007] As a further technical solution of this utility model, an axial through hole is provided in the adjustment section.
[0008] As a further technical solution of this utility model, the end of the adjustment section is fixedly connected to a positioning section, and a groove is provided on one side of the outer wall of the positioning section, and a counterweight is provided in the groove.
[0009] As a further technical solution of this utility model, a positioning groove is provided on the outer wall of the end of the positioning segment, and a wire hole is provided in the front end of the positioning segment.
[0010] As a further technical solution of this utility model, a main shaft mating hole is provided at the end of the positioning section, and a keyway is provided on the inner wall of the main shaft mating hole.
[0011] Compared with existing technologies, the beneficial effects achieved by this utility model are as follows: This utility model adopts a modular design, which significantly improves the guiding accuracy and adaptive adjustment capability. It employs an adjustable connection structure between the guide section and the guide sleeve. Through the cooperation of threaded holes and embedded bolts, it achieves precise control of the gap between the guide sleeve and the inner hole wall. This avoids scratches on the hole wall caused by rigid contact and allows for flexible adaptation to various hole diameter processing needs by replacing guide sleeves of different specifications, greatly enhancing the equipment's versatility. Furthermore, the front and rear support rings of the adjustment section are made of materials with elastic deformation characteristics, forming a double-point elastic support structure. This dynamically compensates for minor form and position errors caused by vibration and thermal deformation of the workpiece during processing, effectively suppressing tool feed trajectory deviation. It fundamentally improves the wall thickness deviation problem caused by insufficient adaptability of traditional rigid guide structures, ensuring the uniformity and consistency of the workpiece wall thickness after processing, providing a reliable guarantee for the product's mechanical properties. Secondly, the device comprehensively optimizes processing efficiency and system operational stability. In terms of chip removal design… The arc-shaped chip removal groove of the adjustment section extends gradually along the axial direction. It can guide the chips to be discharged directionally along the gap between the hole wall and the device by means of the centrifugal force generated by the rotation of the device. This avoids the problems of increased cutting resistance and guide surface wear caused by chip accumulation in the traditional straight groove structure, and significantly improves the smoothness of chip removal. At the same time, the infrared sensor embedded in the groove of the adjustment section can monitor the relative position of the hole wall and the device in real time. The detection data is transmitted to the control system through the built-in channel composed of axial through holes and wire holes, forming a closed-loop feedback mechanism. This facilitates timely detection and early warning of wall thickness deviation, reduces the number of downtimes caused by offline detection, and effectively reduces the scrap rate. The counterweight of the positioning section can dynamically adjust the center of gravity of the device according to the processing load. Combined with the rigid connection design of the spindle mating hole and keyway, it greatly reduces the centrifugal vibration when the ultra-long device rotates at high speed, improves the overall stability of operation, and creates conditions for increasing the processing speed. In addition, the standardized structural design of the positioning section makes it compatible with various models of deep hole processing equipment, further enhancing the engineering applicability and promotion value of the device. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0014] Figure 2 This is an exploded view of the guide section of this utility model;
[0015] Figure 3 This is a three-dimensional structural diagram of the adjustment section of this utility model;
[0016] Figure 4 for Figure 3 Enlarged structural diagram of region A in the middle;
[0017] Figure 5 This is a cross-sectional three-dimensional structural diagram of the adjustment section of this utility model;
[0018] Figure 6 This is a three-dimensional structural diagram of the positioning segment of this utility model;
[0019] Figure 7 This is a cross-sectional three-dimensional structural diagram of the positioning segment of this utility model.
[0020] In the diagram: 1. Guide section; 2. First threaded hole; 3. Guide sleeve; 4. Second threaded hole; 5. Embedded bolt; 6. Adjustment section; 7. Arc-shaped chip removal groove; 8. Front annular mounting groove; 9. Rear annular mounting groove; 10. Embedded groove; 11. Infrared sensor; 12. Front support ring; 13. Rear support ring; 14. Axial through hole; 15. Positioning section; 16. Groove; 17. Counterweight; 18. Positioning groove; 19. Wire hole; 20. Spindle mating hole; 21. Keyway. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0022] Please see the appendix Figure 1 -Appendix Figure 7This utility model provides an embodiment of a guide device for machining ultra-long inner holes while maintaining wall thickness, comprising a guide section 1, a first threaded hole 2 on the outer wall of the guide section 1, a guide sleeve 3 fitted onto the outer surface of the guide section 1, a second threaded hole 4 on the outer wall of the guide sleeve 3, and embedded bolts 5 threadedly connected to both the first threaded hole 2 and the second threaded hole 4; an adjusting section 6 is fixedly connected to the end of the guide section 1; an arc-shaped chip removal groove 7 is formed on the outer wall of the adjusting section 6, and a front annular mounting groove 8 and a rear annular mounting groove 9 are formed on the outer wall of the adjusting section 6, and a front support ring 12 and a rear support ring 13 are respectively fitted onto the front annular mounting groove 8 and the rear annular mounting groove 9, the front support ring 12 and the rear support ring 13 being made of elastic wear-resistant material, and their outer... The wall maintains a small gap with the inner hole wall, which can adapt to the small shape and position errors of the inner hole through its own elastic deformation, reducing vibration transmission during processing, and avoiding surface damage caused by rigid friction with the hole wall, thus improving guiding stability. An embedded groove 10 is opened on one side of the outer wall of the adjustment section 6, and an infrared sensor 11 is installed in the embedded groove 10. The detection end of the infrared sensor 11 faces the inner hole wall, which can collect radial distance data between the hole wall and the device in real time. The data is transmitted to the external control system through the built-in line via the axial through hole 14 and the wire hole 19, providing accurate data support for the monitoring and adjustment of wall thickness deviation, and realizing dynamic monitoring of the processing process. An axial through hole 14 is opened in the adjustment section 6, which extends along the axis of the adjustment section 6, not only The infrared sensor 11 has a concealed wiring channel to prevent exposed wiring from being worn by chips or interfering with processing. It also serves as a cooling medium channel to cool key guiding components such as the guide sleeve 3, front support ring 12, and rear support ring 13, extending their service life. A positioning section 15 is fixedly connected to the end of the adjusting section 6. A groove 16 is provided on one side of the outer wall of the positioning section 15, and a counterweight 17 is installed inside the groove 16. The counterweight 17 can be selectively assembled or replaced with different weight specifications according to the overall center of gravity distribution of the device. By adjusting the mass distribution of the positioning section 15, the centrifugal eccentric force generated during the high-speed rotation of the ultra-long structure is counteracted, reducing device vibration and ensuring the stability of the processing. A fixed... The positioning groove 18 and the front end of the positioning section 15 are provided with a wire hole 19. The positioning groove 18 is used for quick positioning and engagement between the device and external tooling to ensure the consistency of the axis during installation. The wire hole 19 is connected to the axial through hole 14 so that the wiring of the infrared sensor 11 can be led out from inside the device to the external control system, avoiding messy wiring that may affect the machining operation or come into contact with chips. The end of the positioning section 15 is provided with a spindle mating hole 20. A keyway 21 is provided on the inner wall of the spindle mating hole 20. The spindle mating hole 20 is precisely engaged with the outer cylindrical surface of the machine tool spindle. The keyway 21 is connected to the spindle through a flat key to realize the circumferential fixation and torque transmission between the device and the machine tool spindle, ensuring the transmission accuracy when the device rotates synchronously with the spindle and avoiding machining errors caused by relative sliding.
[0023] Working Principle: Using this invention, during operation, the guide section 1 serves as the core guiding structure at the front end. The guide sleeve 3, fitted onto its outer surface, directly contacts the wall of the inner hole to be processed, achieving initial guidance through the outer wall of the guide sleeve 3. The guide sleeve 3 and guide section 1 are fixedly connected via the first threaded hole 2, the second threaded hole 4, and the embedded bolt 5. This structure allows for the adaptation of different diameter inner holes by replacing guide sleeves 3 of different sizes. Simultaneously, the fine-tuning characteristic of the embedded bolt 5 reduces rigid contact between the guide sleeve 3 and the hole wall, preventing scratches and ensuring initial guiding accuracy. The adjustment section 6, fixedly connected to the end of guide section 1, performs the core adjustment function. Chips generated during processing are directionally discharged through the arc-shaped chip removal groove 7 on the outer wall of the adjustment section 6, preventing chip accumulation from affecting guiding accuracy. Front support rings 1 are fitted onto the front annular mounting groove 8 and the rear annular mounting groove 9 of the adjustment section 6, respectively. 2 and rear support ring 13, through elastic deformation to offset processing vibration, form a stable double-point support structure, further enhancing guiding stability. The infrared sensor 11 embedded in the groove 10 detects the relative distance between the hole wall and the device in real time, providing data support for wall thickness uniformity monitoring. The axial through hole 14 in the adjustment section 6 is used for the built-in sensor circuit and cooling pipe, avoiding the circuit exposure from interfering with processing. The positioning section 15 at the end of the adjustment section 6 realizes the stable connection between the device and the machine tool. The counterweight 17 in the groove 16 on the outer wall of the positioning section 15 is used to balance the center of gravity of the device and reduce the vibration when the ultra-long structure rotates at high speed. The positioning groove 18 assists in the precise positioning of the device during installation. The wire hole 19 cooperates with the axial through hole 14 to realize the neat lead-out of the wire. The spindle mating hole 20 at the end of the positioning section 15 is connected to the machine tool spindle. The keyway 21 on the inner wall transmits torque through the key connection, ensuring rotational accuracy and power transmission stability.
[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.
[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A guiding device for processing an ultra-long inner hole with thickness preservation, comprising a guiding section (1), characterized in that: The guide section (1) has a first threaded hole (2) on its outer wall, a guide sleeve (3) is fitted on the outer surface of the guide section (1), a second threaded hole (4) is opened on the outer wall of the guide sleeve (3), and an embedded bolt (5) is threaded into both the first threaded hole (2) and the second threaded hole (4), and an adjustment section (6) is fixedly connected to the end of the guide section (1).
2. The ultra-long bore machining wall thickness preserving guide of claim 1, wherein: An arc-shaped chip removal groove (7) is provided on the outer wall of the adjustment section (6). A front annular mounting groove (8) and a rear annular mounting groove (9) are provided on the outer wall of the adjustment section (6). A front support ring (12) and a rear support ring (13) are respectively fitted on the front annular mounting groove (8) and the rear annular mounting groove (9).
3. The ultra-long bore wall-preserving guide of claim 2, wherein: An embedding groove (10) is provided on one side of the outer wall of the adjustment section (6), and an infrared sensor (11) is provided in the embedding groove (10).
4. The ultra-long bore wall-preserving guide of claim 3, wherein: An axial through hole (14) is provided in the adjustment section (6).
5. The ultra-long bore wall-preserving guide of claim 4, wherein: The end of the adjustment section (6) is fixedly connected to a positioning section (15). A groove (16) is provided on one side of the outer wall of the positioning section (15), and a counterweight (17) is provided in the groove (16).
6. The guiding device for ensuring wall thickness during ultra-long internal hole machining according to claim 5, characterized in that: The positioning section (15) has a positioning groove (18) on its outer wall at the end and a wire hole (19) in its inner front end.
7. A guide device for ensuring wall thickness during ultra-long internal hole machining according to claim 6, characterized in that: The positioning section (15) has a spindle mating hole (20) at its end, and a keyway (21) is provided on the inner wall of the spindle mating hole (20).