Flexible positioning frame for lathing long-axis workpieces

Abstract

The utility model discloses a flexible positioning frame for turning of long-axis workpieces, which is used for adjusting and positioning the long-axis workpieces on a lathe and comprises two flexible positioning clamps which are connected through a fixing frame. The center position formed by the acting force directions of the two flexible positioning clamps corresponds to the center position of a main chuck, and the main chuck serves as a positioning reference of the long-axis workpiece. Each flexible positioning clamp comprises a flexible mechanism and an adjusting mechanism which abut against each other, and each flexible positioning clamp is fixed to the lathe through a base. According to the positioning device, the long-axis workpieces can be accurately positioned, and the rejection rate of the long-axis workpieces in the machining process is reduced.

Description

Technical Field

[0001] The present application relates to the field of machine tool processing parts, and in particular to a flexible positioning frame for machining long-axis workpieces. Background Art

[0002] When machining long shaft workpieces, lathes are usually used, that is, a turning tool is used to turn the rotating long shaft workpiece. Before machining, the long shaft workpiece needs to be positioned to a fixed position by an auxiliary positioning device, and then rotated at high speed to be shaped by the turning tool.

[0003] At present, before processing, the auxiliary positioning device usually uses a rigid fulcrum to support and position the long shaft workpiece for subsequent turning processing. However, this rigid support requires a lot of adjustment and positioning work for the long shaft workpiece before processing, which is a lot of work for the staff and the process is cumbersome and takes a lot of time, thus reducing the processing efficiency of the long shaft workpiece.

[0004] Moreover, the existing rigid support method has insufficient accuracy in positioning long-axis workpieces. If the adjustment of long-axis workpieces deviates, resulting in inaccurate positioning, the scrap rate will increase, and the processing efficiency will be further reduced, affecting product quality.

[0005] In summary, there is an urgent need for a flexible positioning frame for machining long-axis workpieces to solve the problem that the positioning of the long-axis workpieces before machining is difficult and inaccurate. Utility Model Content

[0006] In order to solve the above problems, the present application provides a flexible positioning frame for turning long-axis workpieces, which reduces the tedious adjustment and positioning work of long-axis workpieces before processing, improves the processing efficiency of long-axis workpieces, and at the same time can more accurately position long-axis workpieces, thereby reducing the scrap rate of long-axis workpieces during processing.

[0007] The present application provides a flexible positioning frame for machining long-axis workpieces, which adopts the following technical solution:

[0008] A flexible positioning frame for turning long-axis workpieces is used to adjust and position long-axis workpieces on a lathe, comprising two flexible positioning fixtures, which are connected by a fixed frame, and the center position formed by the direction of the force of the two flexible positioning fixtures corresponds to the center position of a main chuck, which is a positioning reference for the long-axis workpiece; each of the flexible positioning fixtures comprises a flexible mechanism and an adjustment mechanism that conflict with each other, and each of the flexible positioning fixtures is fixed to the lathe through a base.

[0009] By adopting the above technical solution, the long-axis workpiece is placed between two flexible positioning fixtures. The center position formed between the two flexible positioning fixtures at different angles can correspond to the radial center of the long-axis workpiece, thereby more accurately positioning the long-axis workpiece to the correct position and reducing the scrap rate during turning. By adjusting the position of one of the flexible positioning fixtures through the adjustment mechanism and then adjusting the other flexible positioning fixture, the adjustment work of the long-axis workpiece can be effectively reduced and it can be quickly adjusted to the correct angle.

[0010] Preferably, the flexible mechanism is arranged in a cavity of a fixed cylinder, the fixed cylinder comprises a material rod segment and a spring segment, and the material rod segment is close to the long-axis workpiece.

[0011] By adopting the above technical solution, a fixed cylinder is arranged outside the flexible mechanism. When the flexible mechanism plays its buffering role, the fixed cylinder can limit the stretching or compression direction of the flexible mechanism, so that it exerts a force along the axial direction of the fixed cylinder.

[0012] Preferably, the flexible mechanism includes a flexible engineering plastic rod and a compression spring assembly, the flexible engineering plastic rod is located in the material rod section, the compression spring assembly is located in the spring section, one end of the flexible engineering plastic rod is used to contact the long axis workpiece, and the other end is fixedly connected to the compression spring assembly, the other end of the compression spring assembly is in conflict with the adjustment mechanism, and the compression spring assembly is fixed to the inner wall of the fixed cylinder.

[0013] Preferably, the cavity on the material rod segment close to one end of the long-axis workpiece is gap-matched with the flexible engineering plastic rod.

[0014] Preferably, the compression spring assembly includes a first spring and a second spring arranged coaxially, one end of the first spring is fixedly connected to the flexible engineering plastic rod, and the other end is fixed to the inner wall of the fixed cylinder, and one end of the second spring close to the first spring is fixed to the inner wall of the fixed cylinder, and the other end is in conflict with the adjustment mechanism.

[0015] By adopting the above technical solution, flexible engineering plastic rods are used as supporting materials for long-axis workpieces. Compared with rigid materials, hard friction between the two is avoided, and friction scratches and marks on long-axis workpieces can be effectively reduced, thereby improving product quality; the compression spring assembly is fixedly connected to the inside of the fixed cylinder, and when the compression spring assembly is compressed by the adjusting mechanism, it can drive the fixed cylinder to move.

[0016] Preferably, one end of the flexible engineering plastic rod in contact with the long-axis workpiece is in the form of an arc surface, and the curvature of the arc surface can completely match the outer surface of the long-axis workpiece.

[0017] By adopting the above technical solution, the arc surface where the flexible engineering plastic rod contacts the long-axis workpiece is set to completely match the outer surface of the long-axis workpiece before processing, which can increase the fixing effect of the long-axis workpiece and facilitate subsequent precise positioning.

[0018] Preferably, a first fixing pin for fixing the flexible engineering plastic rod is provided on the material rod segment.

[0019] By adopting the above technical solution, the position of the flexible engineering plastic rod is fixed by the first fixing pin to prevent instability and thus affect the adjustment result, thereby ensuring the accuracy and stability of the flexible positioning.

[0020] Preferably, an outer cylinder is provided outside the fixed cylinder, the fixed cylinder is slidably connected to the outer cylinder, a sliding groove along the axial direction of the spring segment is provided on the spring segment of the fixed cylinder, a protrusion matching the sliding groove is provided on the inner wall of the outer cylinder, a second fixing pin for fixing the fixed cylinder is provided on the outer cylinder, and the outer cylinder is fixedly connected to the base.

[0021] By adopting the above technical solution, the mutual cooperation between the slide groove and the protrusion is utilized to ensure that the fixed cylinder slides stably along the axial direction in the outer cylinder, thereby avoiding affecting the positioning effect; at the same time, after the fixed cylinder slides to the correct position, the second fixing pin is used to fix it to prevent it from slipping, thereby achieving stable control of the position of the flexible mechanism and ensuring the stability of the entire structure.

[0022] Preferably, the adjustment mechanism comprises a screw and an adjusting screw handwheel, one end of the screw is in conflict with the second spring, and the other end is fixedly connected to the adjusting screw handwheel.

[0023] By adopting the above technical solution, the screw handwheel is rotated to drive the screw to squeeze the spring, the pressure of the spring is adjusted, and the position of the flexible mechanism is accurately controlled, thereby achieving precise adjustment of long-axis workpieces and improving processing accuracy and efficiency.

[0024] Preferably, the screw rod is threadedly connected to the inner wall of the fixed cylinder, and the screw rod drives the fixed cylinder to reciprocate under the action of the screw rod adjusting hand wheel.

[0025] By adopting the above technical solution, the screw rod is threadedly connected to the fixed cylinder. The screw rod moves under the action of the screw rod adjusting hand wheel to adjust the compression amount of the compression spring assembly. The other end of the compression spring assembly is connected to the fixed cylinder. When the compression spring assembly is compressed to a certain extent, it will drive the fixed cylinder to move in the direction of the screw rod.

[0026] In summary, this application has at least the following beneficial effects:

[0027] (1) The present application realizes flexible positioning of long-axis workpieces by setting up two flexible positioning fixtures. At the same time, the two flexible positioning fixtures are connected by a fixed frame to ensure the overall stability of the positioning frame, thereby reducing the scrap rate of the product and improving the processing accuracy and efficiency.

[0028] (2) The present application adopts a flexible positioning fixture so that the long-axis workpiece can be flexibly supported during the processing. At the same time, engineering plastic rods are used as the support points of the long-axis workpiece, which avoids the hard friction problem caused by rigid support, reduces friction marks and scratches on the workpiece surface, and improves product quality.

[0029] (3) The flexible mechanism and adjustment mechanism provided in the present application enable the flexible positioning fixture to be adjusted according to the size and shape of the workpiece, and is suitable for processing long shaft workpieces of various diameters, thereby improving the applicability and flexibility of the positioning frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front schematic diagram of a flexible positioning frame for machining long-axis workpieces according to the present embodiment;

[0031] Figure 2 is a cross-sectional view of the fixed cylinder in this embodiment;

[0032] Figure 3 is a cross-sectional view of the flexible positioning fixture in this embodiment;

[0033] Figure 4 is a three-dimensional schematic diagram of the flexible positioning fixture in this embodiment;

[0034] Figure 5 It is a three-dimensional schematic diagram of the combination of a flexible positioning frame for machining a long-axis workpiece and a long-axis workpiece in this embodiment.

[0035] Description of reference numerals:

[0036] 1. Flexible positioning fixture; 2. Fixed frame; 3. Base; 4. Fixed cylinder; 41. Material rod section; 42. Spring section; 5. Flexible engineering plastic rod; 6. Compression spring assembly; 61. First spring; 62. Second spring; 7. First fixing pin; 8. Outer cylinder; 9. Slide groove; 10. Second fixing pin; 11. Screw; 12. Handwheel for adjusting the screw. DETAILED DESCRIPTION

[0037] The exemplary embodiments of the present disclosure are described in more detail below in conjunction with the accompanying drawings of the specification. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0038] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features.

[0039] This embodiment provides a flexible positioning frame for lathe machining of long-axis workpieces, which is used to adjust and position long-axis workpieces on a lathe.

[0040] like Figure 1 As shown, it includes two flexible positioning fixtures 1, which are connected by a fixing frame 2, and the center position formed by the force direction of the two flexible positioning fixtures 1 corresponds to the center position of the main chuck.

[0041] The fixing frame 2 is used to fix two flexible positioning fixtures 1 of different angles at corresponding positions, and ensure that their center positions correspond to the center position of the main chuck, which is the positioning reference of the long-axis workpiece, that is, the intersection point generated by the force of the two flexible positioning fixtures 1 coincides with the center point of the main chuck. The adjustment process of this embodiment is to adjust the two flexible positioning fixtures 1 so that the center point of the cross section of the long-axis workpiece coincides with the center point of the main chuck, and then fix the adjusted position.

[0042] Each flexible positioning fixture 1 includes a flexible mechanism and an adjusting mechanism that conflict with each other. Each flexible positioning fixture 1 is fixed on a lathe through a base 3, which is not shown in the figure.

[0043] like Figure 2 As shown, the flexible mechanism is arranged in the cavity of the fixed cylinder 4, and the fixed cylinder 4 includes a material rod segment 41 and a spring segment 42. The material rod segment 41 is close to the long-axis workpiece, and the material rod segment 41 and the spring segment 42 are integrally formed.

[0044] The flexible mechanism includes a flexible engineering plastic rod 5 and a compression spring assembly 6. The flexible engineering plastic rod 5 is located in the material rod section 41, and the compression spring assembly 6 is located in the spring section 42. In this embodiment, refer to Figure 2 Most of the flexible engineering plastic rod 5 is located in the material rod section 41 , and a small part extends into the spring section 42 .

[0045] The cavity on the material rod segment 41 near one end of the long-axis workpiece is gap-matched with the flexible engineering plastic rod 5, so the flexible engineering plastic rod 5 can move freely at this end of the material rod segment 41 near the long-axis workpiece, thereby realizing flexible support and adjustment of the long-axis workpiece.

[0046] One end of the flexible engineering plastic rod 5 is used to contact the long-axis workpiece, and the end in contact with the long-axis workpiece is an arc surface, the curvature of the arc surface can completely match the outer surface of the long-axis workpiece, and assist in achieving stable positioning of the long-axis workpiece.

[0047] The other end of the flexible engineering plastic rod 5 is fixedly connected to the compression spring assembly 6 , the other end of the compression spring assembly 6 is in conflict with the adjustment mechanism, and the compression spring assembly 6 is fixed to the inner wall of the fixed tube 4 .

[0048] Specifically, in this embodiment, the compression spring assembly 6 includes a first spring 61 and a second spring 62 arranged coaxially, and the central axes of the two coincide with the central axis of the fixed cylinder 4, wherein one end of the first spring 61 is fixedly connected to the flexible engineering plastic rod 5, and the other end is fixed to the inner wall of the fixed cylinder 4, and one end of the second spring 62 close to the first spring 61 is fixed to the inner wall of the fixed cylinder 4, and the other end is in conflict with the adjustment mechanism.

[0049] In this embodiment, a first fixing pin 7 for fixing the flexible engineering plastic rod 5 is provided on the material rod segment 41. After the position of the long-axis workpiece is determined, the first fixing pin 7 is used to tighten and fix the flexible engineering plastic rod 5 to prevent it from moving again and affecting the adjustment result.

[0050] like Figure 3 As shown, an outer cylinder 8 is arranged outside the fixed cylinder 4, and the fixed cylinder 4 is slidably connected with the outer cylinder 8. Figure 4 As shown, a slide groove 9 along the axial direction of the spring segment 42 is provided on the spring segment 42 of the fixed cylinder 4, and a protrusion matching with the slide groove 9 is provided on the inner wall of the outer cylinder 8, which is not shown in the figure.

[0051] The outer cylinder 8 is provided with a second fixing pin 10 for fixing the fixing cylinder 4 , and the outer cylinder 8 is welded to the base 3 .

[0052] When the approximate position of the long-axis workpiece is determined, the second fixing pin 10 is used to tighten the fixing tube 4, and then the position of the long-axis workpiece is precisely adjusted under the action of the first spring 61, and then the first fixing pin 7 is used to fix the accurate position of the long-axis workpiece.

[0053] The approximate position of the long-axis workpiece is determined by an adjusting mechanism, which includes a screw 11 and an adjusting screw handwheel 12 . One end of the screw 11 is in contact with the second spring 62 , and the other end is fixedly connected to the adjusting screw handwheel 12 .

[0054] The screw rod 11 is threadedly connected to the inner wall of the fixed tube 4 , and the screw rod 11 drives the fixed tube 4 to reciprocate under the action of the screw rod adjusting hand wheel 12 .

[0055] Under the action of the adjusting screw handwheel 12, the screw 11 moves and presses against the second spring 62 to compress it. Since the other end of the second spring 62 is fixed on the fixed cylinder 4, when the second spring 62 is compressed to a certain state, it will drive the fixed cylinder 4 to move, thereby adjusting the approximate position of the long-axis workpiece.

[0056] The implementation principle of this embodiment is: Figure 5 As shown, when processing a long-axis workpiece, the base 3 of the flexible positioning fixture 1 supported under the long-axis workpiece is installed in a fixed position on the lathe, and then the adjusting screw handwheels 12 of the two flexible positioning fixtures 1 are rotated to adjust the pressure of the second spring 62 to the optimal state, driving the fixed cylinder 4 to move. After moving to the appropriate position, use the second fixing pin 10 to fix it, and then finely adjust the flexible engineering plastic rod 5 controlled by the first spring 61. After adjusting to the appropriate position, use the first fixing pin 7 to fix it, so that the horizontal position of the center point of the cross section of the long-axis workpiece is consistent with the height of the main chuck; next, use the same method to adjust the flexible positioning fixture 1 on the right side, so that the position of the center point of the cross section of the long-axis workpiece is consistent with the center position of the main chuck.

[0057] In this embodiment, two flexible engineering plastic rods 5 are used to clamp the two contact points of the long-axis workpiece, so that the workpiece can ensure its own concentricity and coaxiality when rotating. The working fulcrum and working pressure of the flexible buffer are adjusted according to the diameter of the workpiece, so that the workpiece can be stabilized in the cutting processing position.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application. For example, different materials or features can be selected according to actual needs to replace part or all of the technical features in the above embodiments; the technical features in the above embodiments can also be combined or split to form a new technical solution. In short, any simple modification, equivalent replacement or improvement of the technical solution of the present application should be included in the protection scope of the present application.

Claims

1. A flexible positioning frame for machining long-axis workpieces, used for adjusting and positioning long-axis workpieces on a lathe, characterized by: The invention comprises two flexible positioning fixtures (1), wherein the two flexible positioning fixtures (1) are connected via a fixing frame (2), and the center position formed by the direction of the force of the two flexible positioning fixtures (1) corresponds to the center position of a main chuck, and the main chuck is a positioning reference for the long-axis workpiece; each of the flexible positioning fixtures (1) comprises a flexible mechanism and an adjustment mechanism that conflict with each other, and each of the flexible positioning fixtures (1) is fixed to the lathe via a base (3).

2. The flexible positioning frame for machining long-axis workpieces according to claim 1, characterized in that: The flexible mechanism is arranged in a cavity of a fixed cylinder (4); the fixed cylinder (4) comprises a material rod segment (41) and a spring segment (42); the material rod segment (41) is close to the long-axis workpiece.

3. The flexible positioning frame for machining long-axis workpieces according to claim 2, characterized in that: The flexible mechanism comprises a flexible engineering plastic rod (5) and a compression spring assembly (6); the flexible engineering plastic rod (5) is located in the material rod section (41); the compression spring assembly (6) is located in the spring section (42); one end of the flexible engineering plastic rod (5) is used to contact the long-axis workpiece; the other end is fixedly connected to the compression spring assembly (6); the other end of the compression spring assembly (6) is in contact with the adjustment mechanism; and the compression spring assembly (6) is fixed to the inner wall of the fixed cylinder (4).

4. The flexible positioning frame for machining long-axis workpieces according to claim 3, characterized in that: The cavity on the material rod segment (41) close to one end of the long-axis workpiece is clearance-matched with the flexible engineering plastic rod (5).

5. The flexible positioning frame for machining long-axis workpieces according to claim 3, characterized in that: The compression spring assembly (6) comprises a first spring (61) and a second spring (62) which are coaxially arranged, one end of the first spring (61) being fixedly connected to the flexible engineering plastic rod (5), and the other end being fixed to the inner wall of the fixed cylinder (4), and one end of the second spring (62) close to the first spring (61) being fixed to the inner wall of the fixed cylinder (4), and the other end being in contact with the adjustment mechanism.

6. The flexible positioning frame for machining long-axis workpieces according to claim 3, characterized in that: The end of the flexible engineering plastic rod (5) that contacts the long-axis workpiece is in the form of an arc surface, and the curvature of the arc surface can completely match the outer surface of the long-axis workpiece.

7. The flexible positioning frame for machining long-axis workpieces according to claim 3, characterized in that: The material rod segment (41) is provided with a first fixing pin (7) for fixing the flexible engineering plastic rod (5).

8. The flexible positioning frame for machining long-axis workpieces according to claim 3, characterized in that: An outer cylinder (8) is arranged outside the fixed cylinder (4), and the fixed cylinder (4) is slidably connected to the outer cylinder (8). A sliding groove (9) along the axial direction of the spring segment (42) is provided on the spring segment (42) of the fixed cylinder (4), and a protrusion matching with the sliding groove (9) is provided on the inner wall of the outer cylinder (8). A second fixing pin (10) for fixing the fixed cylinder (4) is provided on the outer cylinder (8), and the outer cylinder (8) is fixedly connected to the base (3).

9. The flexible positioning frame for machining long-axis workpieces according to claim 5, characterized in that: The adjustment mechanism comprises a screw rod (11) and an adjusting screw rod hand wheel (12); one end of the screw rod (11) is in contact with the second spring (62), and the other end is fixedly connected to the adjusting screw rod hand wheel (12).

10. The flexible positioning frame for machining long-axis workpieces according to claim 9, characterized in that: The screw rod (11) is threadedly connected to the inner wall of the fixed cylinder (4), and the screw rod (11) drives the fixed cylinder (4) to reciprocate under the action of the screw rod adjustment hand wheel (12).

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