Slender shaft machining jig for numerical control lathe

Abstract

The utility model relates to the technical field of slender shaft machining, and discloses a slender shaft machining jig for a numerical control lathe, which comprises a machine tool, a fastening piece is fixedly connected to the side wall of the machine tool, a long shaft workpiece is clamped on the fastening piece, and a stabilizing piece is fixedly connected to the other side wall of the machine tool. The machining precision can be obviously improved; due to the fact that the monitoring device can detect the coaxiality of the axis of the long-axis workpiece and the gap between the supporting claws in real time, once deviation is found, measures can be taken in time for adjustment, it is ensured that the long-axis workpiece is always in an ideal clamping state in the whole machining process, and therefore machining errors caused by shaft deviation are effectively reduced; for example, when the outer circle of a slender shaft is turned, the cylindricity error can be controlled within an extremely small range, the size precision and the shape precision of the shaft are improved, the machined slender shaft can better meet the assembly requirement of high-precision mechanical parts, and the overall performance and the quality stability of a product are improved.

Description

Technical Field

[0001] This utility model relates to the field of slender shaft machining technology, specifically a slender shaft machining fixture for CNC lathes. Background Technology

[0002] In the field of machining, the machining of slender shafts has always been a challenging task, and the follow post, as a key auxiliary device in the machining process of slender shafts, plays an important role in ensuring machining accuracy and stability.

[0003] Traditional tool holders use support jaws to clamp slender shafts, providing necessary support and reducing deformation during machining. However, this structure has significant technical drawbacks. In actual machining, slender shafts are prone to deformation due to their material properties and the effects of cutting forces. Once deformed, their actual axis deviates from the center line of the clamping gap provided by the support jaws. This results in uneven clamping force from the support jaws, further exacerbating the deformation and increasing the surface roughness of the machined shaft. Dimensional accuracy is difficult to guarantee, and in severe cases, it can even lead to the scrapping of the slender shaft, increasing production costs and machining time.

[0004] Furthermore, during long-term use, the position of the support jaws on the tool holder may shift, causing the originally reserved clamping clearance to fail to properly align with the axis of the slender shaft. In this case, stable clamping of the slender shaft cannot be achieved, leading to numerous problems during machining. For example, uneven clamping force can cause vibration of the slender shaft, affecting not only the surface finish but also damaging the tool and shortening its lifespan. Simultaneously, due to the inability to precisely control the position of the slender shaft, the cylindricity, straightness, and other dimensional and positional tolerances of the machined shaft may not meet design requirements, reducing product yield and production efficiency, and failing to meet the demands of modern high-precision machining.

[0005] Furthermore, current processing equipment lacks effective monitoring measures when facing the aforementioned problems. Operators often find it difficult to detect clamping abnormalities in slender shafts during processing, and issues can only be identified after processing through product inspection. This undoubtedly results in a significant waste of manpower, resources, and time, severely hindering the development and application of slender shaft processing technology. Therefore, there is an urgent need for a technical solution that can effectively monitor the clamping status of the tool holder and provide timely feedback and adjustments to solve these problems in existing slender shaft processing, improve the accuracy, quality, and efficiency of slender shaft processing, reduce production costs and scrap rates, and meet the growing industrial demand for high-precision slender shafts.

[0006] Therefore, we propose a slender shaft machining fixture for CNC lathes to solve the above problems. Utility Model Content

[0007] (a) Technical problems to be solved

[0008] To address the shortcomings of existing technologies, this invention provides a machining fixture for slender shafts on CNC lathes that can monitor and provide early warnings of deformation during machining and can provide deformation feedback, thereby solving the problems mentioned in the background art.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, the present invention provides the following technical solution: a slender shaft machining fixture for a CNC lathe, comprising a machine tool, a fastener fixedly connected to the side wall of the machine tool, a long shaft workpiece clamped on the fastener, and a stabilizing component fixedly connected to the other side wall of the machine tool.

[0011] Preferably, a first track and a second track are fixedly connected to the working surface of the machine tool, with the second track located on one side of the first track.

[0012] Preferably, a support plate is slidably connected to the first track, and a following frame is fixedly connected to the support plate, with support claws provided on the following frame.

[0013] Preferably, a feedback element is symmetrically fixedly connected to the support claw, and a monitoring cavity is opened in the feedback element. An abutment piece is slidably connected to the bottom of the monitoring cavity.

[0014] Preferably, a reset spring is fixedly connected inside the monitoring cavity, with one end of the reset spring away from the fixed point fixedly connected to the abutment plate, and a float plate is slidably connected to the upper part of the monitoring cavity.

[0015] Preferably, a first electrical contact is fixedly connected to the upper surface of the floating plate, a second electrical contact is fixedly connected to the top of the monitoring cavity wall, and a scale line is fixedly connected to the upper surface of the feedback device.

[0016] Beneficial effects

[0017] Compared with the prior art, this utility model provides a slender shaft machining fixture for CNC lathes, which has the following (iii) beneficial effects:

[0018] 1. This utility model, through the design of an integrated device, can significantly improve machining accuracy. Specifically, because the monitoring device can detect the coaxiality of the long shaft workpiece's axis and the clamping clearance of the support jaws in real time, any deviation can be promptly adjusted to ensure that the long shaft workpiece remains in an ideal clamping state throughout the entire machining process. This effectively reduces machining errors caused by shaft offset. For example, when turning the outer diameter of a slender shaft, the cylindricity error can be controlled within a very small range, improving the dimensional and shape accuracy of the shaft. This allows the machined slender shaft to better meet the assembly requirements of high-precision mechanical parts, enhancing the overall performance and quality stability of the product.

[0019] Meanwhile, real-time monitoring allows operators to promptly grasp the clamping status of long-shaft workpieces, preventing unstable machining operations caused by undetected shaft deformation or support claw displacement. Maintaining a stable clamping state reduces vibration and wobbling during machining, facilitating uniform cutting of the workpiece by the tool, reducing surface roughness, and improving surface quality. This results in a smoother and flatter surface for long-shaft workpieces, meeting the requirements of applications with high surface quality. A stable machining process also reduces tool wear and breakage risks, lowering tool replacement frequency and machining costs, while simultaneously improving machining efficiency and reducing downtime and scrap rates caused by tool issues.

[0020] 2. This utility model, through the combined use of a floating plate and scale lines, can provide feedback on the deviation of the long shaft workpiece being machined. It can accurately provide feedback on the deviation value between the axis of the long shaft workpiece and the clamping gap of the support claw. Based on this accurate feedback information, the operator can dynamically adjust the machining work, such as precisely adjusting the cutting speed, feed rate and depth of cut, to compensate for the machining error caused by the deviation of the shaft. This precise control capability ensures that even if the slender shaft is deformed to a certain extent, products that meet high precision requirements can still be machined, which greatly improves the dimensional accuracy and shape accuracy of the machining, and improves the product qualification rate and the stability of the machining quality.

[0021] Meanwhile, real-time deviation feedback enables problems in the processing to be detected and resolved in a timely manner, avoiding the discovery of product defects only after processing is completed, and greatly reducing the generation of scrap. At the same time, because processing parameters and processes can be quickly adjusted based on feedback information, the downtime and adjustment time in the processing process are reduced, improving the operating efficiency of the equipment and the continuity of production, thereby significantly improving the overall production efficiency. Attached Figure Description

[0022] Figure 1 This is a view of the appearance of the present utility model;

[0023] Figure 2 This is a top view of the structure of this utility model;

[0024] Figure 3 This is a structural diagram of the main body of this utility model;

[0025] Figure 4 In this utility model Figure 3 Enlarged view of a portion of the structure at point A;

[0026] Figure 5 This is a side view of the main structure of this utility model;

[0027] Figure 6 In this utility model Figure 5 Enlarged view of the structure at point B in the middle.

[0028] In the picture:

[0029] 1. Machine tool; 2. Fastener; 3. Long shaft workpiece; 4. Stabilizer; 5. First track; 6. Second track; 7. Support plate; 8. Car frame; 9. Support claw; 10. Feedback component; 11. Monitoring cavity; 12. Abutment piece; 13. Return spring; 14. Float plate; 15. First electrical contact; 16. Second electrical contact; 17. Scale line. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0032] Example

[0033] Please refer to Figures 1 to 6 As shown:

[0034] A machining fixture for slender shafts on a CNC lathe includes a machine tool 1, a fastener 2 fixedly connected to the side wall of the machine tool 1, a long shaft workpiece 3 clamped on the fastener 2, a stabilizing member 4 fixedly connected to the other side wall of the machine tool 1, a first track 5 and a second track 6 fixedly connected to the working surface of the machine tool 1, the second track 6 being located on one side of the first track 5, a support plate 7 slidably connected to the first track 5, a following frame 8 fixedly connected to the support plate 7, a support claw 9 provided on the following frame 8, and symmetrically fixed anti-shaft bearings on the support claw 9. Feedback component 10 has a monitoring cavity 11 inside. A contact plate 12 is slidably connected to the bottom of the monitoring cavity 11. A reset spring 13 is fixedly connected inside the monitoring cavity 11. One end of the reset spring 13 away from the fixed point is fixedly connected to the contact plate 12. A float plate 14 is slidably connected to the upper part of the monitoring cavity 11. A first electrical contact 15 is fixedly connected to the upper surface of the float plate 14. A second electrical contact 16 is fixedly connected to the top of the cavity wall of the monitoring cavity 11. A scale line 17 is fixedly connected to the upper surface of the feedback component 10.

[0035] in:

[0036] Fastener 2 is used to fasten the long shaft workpiece 3.

[0037] The stabilizer 4 is used to stabilize the long shaft workpiece 3 during the rotation process, thereby preventing the long shaft workpiece 3 from shaking during rotation.

[0038] The first track 5 is used to provide motion guidance for the support plate 7.

[0039] The second track 6 is used to provide motion guidance for the cutting tool and other machining tools.

[0040] There are two support claws 9, arranged symmetrically, and each claw has a groove. During use, the long shaft workpiece 3 is confined in the groove.

[0041] The monitoring chamber 11 contains a solution, which is mainly used to propel the floating plate 14 to move within the monitoring chamber 11.

[0042] The reset spring 13 is mainly used for resetting the abutment piece 12.

[0043] The first electrical contact 15 and the second electrical contact 16 work together. When the first electrical contact 15 and the second electrical contact 16 come into contact with each other, the main controller, which is electrically connected to them, will control the warning buzzer on the device to perform a warning operation.

[0044] The scale line 17 is used in conjunction with the floating plate 14 to provide feedback on the deformability of the long-axis workpiece 3.

[0045] Working principle:

[0046] In the initial state:

[0047] The first electrical contact 15 is not in contact with the second electrical contact 16, and the return spring 13 is not compressed.

[0048] The follower frame 8 typically has two or three support claws 9, which are mounted on the first track 5 of the machine tool 1 and move along the first track 5 together with the cutting tool. The support claws 9 of the follower frame 8 can be adjusted according to the diameter of the long shaft workpiece 3 to maintain appropriate contact pressure with the shaft surface. During the machining process, the support claws 9 of the follower frame 8 are always in contact with the surface of the long shaft workpiece 3 and move synchronously with the feed of the cutting tool.

[0049] In actual use, when the follower frame 8 moves in conjunction with the cutting tool, the support claw 9 on the follower frame 8 will clamp the long shaft workpiece 3 and release the long shaft workpiece 3, thereby counteracting the radial force generated by the cutting force on the long shaft workpiece 3 and reducing the deformation of the shaft.

[0050] Furthermore, when the long shaft workpiece 3 deforms, the deformed long shaft workpiece 3 will indirectly contact the abutment piece 12 on the support claw 9 and push the abutment piece 12. At this time, the abutment piece 12 will move in the monitoring cavity 11, and the return spring 13 will be compressed. Since the monitoring cavity 11 is known to contain a solution, the float plate 14 in the monitoring cavity 11 will move upward under the push of the solution, and finally the first electrical contact 15 on the float plate 14 will contact the second electrical contact 16. At this time, the main controller that has an electrical connection with the first electrical contact 15 and the second electrical contact 16 will control the warning device to issue a warning, thereby reminding the relevant operators.

[0051] Furthermore, the overall device significantly improves machining accuracy. Because the monitoring device can monitor the coaxiality of the axis of the long shaft workpiece 3 and the clamping clearance of the support jaw 9 in real time, any deviation can be promptly addressed to ensure that the long shaft workpiece 3 remains in an ideal clamping state throughout the machining process. This effectively reduces machining errors caused by shaft offset. For example, when turning the outer diameter of a slender shaft, the cylindricity error can be controlled within a very small range, improving the dimensional and shape accuracy of the shaft. This allows the machined slender shaft to better meet the assembly requirements of high-precision mechanical parts, enhancing the overall performance and quality stability of the product.

[0052] Furthermore, by using the float plate 14 in conjunction with the scale line 17, the deviation of the long shaft workpiece 3 being machined can be fed back. It can accurately feed back the deviation value between the axis of the long shaft workpiece 3 and the clamping gap of the support claw 9. Based on this accurate feedback information, the operator can make dynamic adjustments to the machining work, such as precisely adjusting the cutting speed, feed rate and depth of cut to compensate for the machining error caused by the deviation of the shaft. This precise control capability ensures that even if the slender shaft is deformed to a certain extent, products that meet the high precision requirements can still be machined, which greatly improves the dimensional accuracy and shape accuracy of the machining, and improves the product qualification rate and the stability of the machining quality.

[0053] Meanwhile, real-time deviation feedback enables problems in the processing to be detected and resolved in a timely manner, avoiding the discovery of product defects only after processing is completed, and greatly reducing the generation of scrap. At the same time, because processing parameters and processes can be quickly adjusted based on feedback information, the downtime and adjustment time in the processing process are reduced, improving the operating efficiency of the equipment and the continuity of production, thereby significantly improving the overall production efficiency.

[0054] Please refer to the above work process. Figures 1 to 6 .

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machining fixture for slender shafts on a CNC lathe, comprising a machine tool (1), characterized in that: The machine tool (1) is fixedly connected to a fastener (2) on one side wall, and a long shaft workpiece (3) is clamped on the fastener (2). A stabilizing component (4) is fixedly connected to the other side wall of the machine tool (1).

2. A slender shaft machining fixture for a CNC lathe according to claim 1, characterized in that: The machine tool (1) has a first track (5) and a second track (6) fixedly connected on its working surface, with the second track (6) located on one side of the first track (5).

3. A slender shaft machining fixture for a CNC lathe according to claim 2, characterized in that: A support plate (7) is slidably connected on the first track (5), and a following frame (8) is fixedly connected on the support plate (7). A support claw (9) is provided on the following frame (8).

4. A slender shaft machining fixture for a CNC lathe according to claim 3, characterized in that: Feedback components (10) are symmetrically fixedly connected to the support claw (9). A monitoring cavity (11) is opened inside the feedback component (10). An abutment piece (12) is slidably connected to the bottom of the monitoring cavity (11).

5. A slender shaft machining fixture for a CNC lathe according to claim 4, characterized in that: A reset spring (13) is fixedly connected inside the monitoring cavity (11). The end of the reset spring (13) away from the fixed point is fixedly connected to the abutment plate (12). A float plate (14) is slidably connected to the upper part of the inner cavity of the monitoring cavity (11).

6. A slender shaft machining fixture for a CNC lathe according to claim 5, characterized in that: The upper surface of the floating plate (14) is fixedly connected to a first electrical contact (15), the top of the wall of the monitoring cavity (11) is fixedly connected to a second electrical contact (16), and the upper surface of the feedback device (10) is fixedly connected to a scale line (17).

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