Steel wire tension detection mechanism for multi-strand spring numerical control machine tool

Abstract

The utility model discloses a steel wire tension detection mechanism for a multi-strand spring numerical control machine tool, which comprises a tension detection component and a tension detection component, the tension detection component comprises a tension sensor fixedly connected in a cradle, and the tension sensor is connected with a steel wire guide wheel for guiding a steel wire rope; the tension detection balance assembly comprises a balance rod connected in the cradle, one end of the balance rod is movably connected to the tension sensor, and the other end of the balance rod is connected with a balancing weight with an adjustable gravity center position; the device can eliminate the influence of the gravity and centrifugal force of the tension sensor on the tension measurement of the steel wire, and improves the processing quality of the multi-strand spring.

Description

Technical Field

[0001] This utility model relates to the field of multi-strand helical spring manufacturing technology, and in particular to a wire tension detection mechanism for multi-strand spring CNC machine tools. Background Technology

[0002] Multi-strand springs are helical springs made by winding a steel cable composed of multiple strands of steel wire. As a high-performance basic component, multi-strand springs are widely used in automatic weapons and aero engines. However, their manufacturing process is complex, and the control of the wire lay pitch is crucial. Improving the stability of the wire tension control is key to ensuring the processing quality of the multi-strand spring cable and the performance of the multi-strand spring.

[0003] In the prior art, when measuring the tension of a wire rope in a multi-strand spring CNC machining tool, the relevant components in the tension measurement system used to measure the wire rope tension will generate gravity and centrifugal force. The influence of gravity and centrifugal force on the tension needs to be eliminated by an algorithm. However, the interpolation error of the spindle phase encoder restricts the accuracy of tension measurement and the stability of tension control. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the above and / or existing steel wire tension measurement, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a wire tension detection mechanism for multi-strand spring CNC machine tools, which can eliminate the influence of gravity and centrifugal force of tension sensor on wire tension measurement and improve the processing quality of multi-strand springs.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a wire tension detection mechanism for a multi-strand spring CNC machine tool, comprising,

[0008] The tension detection assembly includes a tension sensor fixedly connected inside the cradle, and a wire guide wheel for guiding the wire rope is connected to the tension sensor;

[0009] The tension detection and balancing assembly includes a balance bar connected inside the cradle. One end of the balance bar is movably connected to a tension sensor, and the other end of the balance bar is connected to a counterweight with an adjustable center of gravity.

[0010] One end of the balance bar has a fixing hole for easy connection with the housing of the tension sensor. Adjusting the position of the counterweight center in the height direction allows the counterweight block to move up and down. When the counterweight block reaches a suitable position in the height direction, i.e., when the center of the counterweight is at the same height as the center of the tension sensor, stop adjusting the position of the counterweight block in the height direction, fixing the counterweight block relative to the balance bar. Adjusting the center of gravity of the counterweight in the front-back direction allows the balance bar to slide back and forth along the housing of the tension sensor. When the balance bar reaches a suitable position, i.e., when the center of gravity of the counterweight connected to the balance bar coincides with the center of gravity of the tension sensor in the front-back direction, use fixing screws to screw into the fixing hole and the housing to fix the position of the balance bar in the front-back direction. Additionally, the overall counterweight mass of the counterweight block can be adjusted. By using the gravity and centrifugal force of the counterweight to balance the tension and centrifugal force of the tension sensor, the accuracy and stability of tension control are improved, thus improving the quality of cold-wound steel cables.

[0011] As a preferred embodiment of the wire tension detection mechanism for multi-strand spring CNC machine tools in this utility model, wherein: the other end of the balance rod is fixedly connected to a counterweight adjusting screw, the counterweight block is connected to the counterweight block, a lower nut is threadedly connected to the counterweight adjusting screw on the lower side of the counterweight block, and an upper nut is threadedly connected to the counterweight adjusting screw on the upper side of the counterweight block.

[0012] As a preferred embodiment of the wire tension detection mechanism for multi-strand spring CNC machine tools in this utility model, a counterweight adjustment plate is connected to the counterweight adjustment screw between the upper side of the lower nut and the lower side of the counterweight block.

[0013] As a preferred embodiment of the wire tension detection mechanism for multi-strand spring CNC machine tools in this utility model, wherein: the adjusting screw is threadedly connected to the balance bar, the upper end of the adjusting screw abuts against the upper side of the balance bar, and a fixing nut is threadedly connected to the adjusting screw on the lower side of the balance bar.

[0014] As a preferred embodiment of the wire tension detection mechanism for multi-strand spring CNC machine tools in this utility model, the cradle is connected to a main shaft, which is rotatably connected to a balance bar via a support bearing. One side of the support bearing in the axial direction abuts against the step of the balance bar, and an end cap is connected to the balance bar on the other side in the axial direction of the support bearing. A fastening nut is threaded onto the main shaft, and the fastening nut abuts against the other side in the axial direction of the support bearing.

[0015] As a preferred embodiment of the wire tension detection mechanism for multi-strand spring CNC machine tools in this utility model, the end cover is provided with a number of connecting holes, and the balance rod is provided with a number of countersunk holes that correspond one-to-one with the connecting holes.

[0016] As a preferred embodiment of the wire tension detection mechanism for multi-strand spring CNC machine tools in this utility model, the main spindle is threadedly connected to the cradle, and a connecting nut is threadedly connected to the main spindle outside the cradle, with the connecting nut abutting against the outer wall of the cradle.

[0017] As a preferred embodiment of the wire tension detection mechanism for multi-strand spring CNC machine tools in this utility model, wherein: a connecting support is fixedly connected to the inner side of the cradle, a tension sensor is fixedly connected to the connecting support, a bracket is fixedly connected to the tension sensor, the bracket is fixedly connected to the inner ring of the mounting bearing, and the wire guide wheel is connected to the outer ring of the mounting bearing.

[0018] Compared with the prior art, this utility model has the following technical effects: by adjusting the position of the counterweight in the height direction and the front-back direction, the center of gravity of the counterweight is made to coincide with the center of gravity of the tension sensor. At the same time, by adjusting the weight configuration of the counterweight, the tension and centrifugal force of the tension sensor are balanced, thereby improving the accuracy and stability of tension control and improving the quality of steel cable winding. It can be applied to the tension measurement work when cold winding steel cable in multi-strand spring CNC machine tools. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a top view of the present invention installed on a cradle.

[0021] Figure 2 This is a three-dimensional structural diagram of the present invention installed on a cradle.

[0022] Figure 3 This is a structural diagram of the tension detection and balancing component in this utility model.

[0023] Figure 4 for Figure 3 View from point AA.

[0024] Figure 5 for Figure 3 View from point BB.

[0025] Figure 6 for Figure 5 A magnified view of a section at point C.

[0026] Figure 7 This is a schematic diagram of the tension detection component in this utility model.

[0027] In the diagram, 100 is the tension detection assembly, 101 is the connecting support, 102 is the tension sensor, 103 is the bracket, 104 is the steel wire guide wheel, 105 is the mounting bearing, 106 is the elastic retaining ring, 200 is the tension detection balancing assembly, 201 is the main shaft, 202 is the balance bar, 202-1 is the fixing hole, 203 is the counterweight, 204 is the connecting nut, 205 is the end cap, 206 is the counterweight adjusting screw, 207 is the lower nut, 208 is the upper nut, 209 is the fixing nut, 210 is the support bearing, 211 is the counterweight adjusting plate, 212 is the fastening nut, 213 is the fixing bolt, 300 is the cradle, and 400 is the steel wire. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0031] Example 1: Refer to Figure 1 and Figure 7 This is the first embodiment of the present invention. This embodiment provides a wire tension detection mechanism for a multi-strand spring CNC machine tool, which can monitor the processing of multi-strand helical springs and control the corresponding parts in the machine tool to adjust the processing parameters based on the monitored data, thereby improving processing efficiency and spring quality.

[0032] A tension detection mechanism for a multi-strand spring CNC machine tool with a steel wire 400 includes a tension detection component 100 and a tension detection balancing component 200 for balancing the tension detection component 100. The tension detection component 100 includes a tension sensor 102 fixedly connected inside a cradle 300, and a steel wire guide wheel 104 for guiding the steel wire 400 rope is connected to the tension sensor 102. The tension detection balancing component 200 includes a balance bar 202 connected inside the cradle 300, one end of the balance bar 202 is movably connected to the tension sensor 102, and the other end of the balance bar 202 is connected to a counterweight 203 with an adjustable center of gravity.

[0033] One end of the balance bar 202 has a fixing hole 202-1 for easy connection with the housing of the tension sensor 102; adjust the position of the counterweight center in the height direction to move the counterweight block 203 up and down. When the counterweight block 203 moves to a suitable position in the height direction, that is, when the center of the counterweight is at the same height as the center of the tension sensor 102, stop adjusting the position of the counterweight block 203 in the height direction, so that the counterweight block 203 is fixed relative to the balance bar 202; adjust the center of gravity of the counterweight in the front-back direction so that the balance bar 202 is aligned with the tension sensor 102. The housing slides back and forth. When the balance bar 202 moves to the appropriate position, the center of gravity of the counterweight connected to the balance bar 202 and the center of gravity of the tension sensor 102 coincide in the front-back direction. Fixing screws are screwed into the fixing hole 202-1 and the housing to fix the position of the balance bar 202 in the front-back direction. In addition, the counterweight block 203 can be configured to provide the overall counterweight mass. The gravity and centrifugal force of the counterweight balance the tension and centrifugal force of the tension sensor 102, thereby improving the accuracy and stability of tension control and improving the quality of cold-wound steel cable.

[0034] Specifically, a connecting support 101 is fixedly connected to the inner side of the cradle 300, a tension sensor 102 is fixedly connected to the connecting support 101, a bracket 103 is fixedly connected to the sensing end of the tension sensor 102, the bracket 103 is fixedly connected to the inner ring of the mounting bearing 105 (in actual implementation, the bracket 103 and the inner ring of the mounting bearing 105 are welded together), a wire guide wheel 104 is connected to the outer ring of the mounting bearing 105, and an elastic retaining ring 106 for limiting the axial movement of the mounting bearing 105 is also connected inside the wire guide wheel 104.

[0035] The tension of the steel wire 400 is transmitted to the tension sensor 102 through the steel wire guide wheel 104 and the bracket 103, and the tension sensor 102 detects the tension.

[0036] Example 2: Refer to Figure 4 This is the second embodiment of the present invention. The difference between this embodiment and embodiment 1 is that it can further realize the connection between the counterweight 203 and the balance bar 202.

[0037] The other end of the balance bar 202 is fixedly connected to a counterweight adjusting screw 206. The counterweight block 203 is connected to the adjusting screw. A lower nut 207 is threaded onto the counterweight adjusting screw 206 on the lower side of the counterweight block 203, and an upper nut 208 is threaded onto the counterweight adjusting screw 206 on the upper side of the counterweight block 203.

[0038] When adjusting the position of the counterweight 203 in the height direction, the position of the upper nut 208 and the lower nut 207 is adjusted to restrict the counterweight 203 between the upper nut 208 and the lower nut 207, thereby realizing the adjustment of the position of the counterweight 203 in the height direction, which is convenient.

[0039] Example 3: Reference Figure 2 and Figure 4 This is the second embodiment of the present invention. The difference between this embodiment and embodiment 2 is that it can further realize the adjustment of the weight of the counterweight part.

[0040] Specifically, a counterweight adjusting plate 211 is connected to the counterweight adjusting screw 206 between the upper side of the lower nut 207 and the lower side of the counterweight block 203.

[0041] Various counterweight adjustment plates 211 of different specifications and sizes are provided. According to actual needs, the number and size configuration of the counterweight adjustment plates 211 on the counterweight adjustment screw 206 under the lower nut 207 are adjusted to achieve the adjustment of the counterweight weight.

[0042] Specifically, the adjusting screw is threaded onto the balance bar 202, with the upper end of the adjusting screw abutting against the upper side of the balance bar 202, and a fixing nut 209 threaded onto the adjusting screw on the lower side of the balance bar 202; this structure achieves a fixed connection between the balance bar 202 and the adjusting screw.

[0043] Example 4: Reference Figure 2 , Figure 3 , Figure 5 Embodiment 6 is the fourth embodiment of this utility model. The difference between this embodiment and Embodiment 3 is that it can further realize the position adjustment of the counterweight in the front-rear direction.

[0044] Specifically, a main shaft 201 is connected to the cradle 300. The main shaft 201 is rotatably connected to the balance bar 202 via a support bearing 210. One side of the support bearing 210 in the axial direction abuts against the step of the balance bar 202. An end cap 205 is connected to the balance bar 202 on the other side in the axial direction of the support bearing 210. A fastening nut 212 is threaded onto the main shaft 201, and the fastening nut 212 abuts against the other side in the axial direction of the support bearing 210. Several [unclear text - possibly related to a product or service] are arranged on the end cap 205. The balance bar 202 has several countersunk holes that correspond one-to-one with the connecting holes. Fixing bolts 213 and other fasteners are screwed into the connecting holes and the corresponding countersunk holes, so that the fixing bolts 213 press the end cover 205 onto the balance bar 202, thereby achieving a fixed connection between the end cover 205 and the balance bar 202. The main shaft 201 is threaded onto the cradle 300. A connecting nut 204 is threaded onto the main shaft 201 outside the cradle 300, and the connecting nut 204 abuts against the outer wall of the cradle 300.

[0045] When adjusting the position of the counterweight in the front-back direction, loosen the connecting nut 204 and rotate the main shaft 201. The main shaft 201 rotates and moves, and the main shaft 201 drives the balance bar 202 to move back and forth through the fastening nut 212, end cover 205 and support bearing 210. The balance bar 202 drives the counterweight block 203 and counterweight adjustment plate 211 to move. When the counterweight part moves to the appropriate position in the front-back direction, stop rotating the main shaft 201, screw on the connecting nut 204 so that the connecting nut 204 abuts against the outside of the cradle 300, and use the fixing screw to screw into the fixing hole 202-1 and the housing to fix the balance bar 202 to the housing, so that the position of the main shaft 201 in the front-back direction is fixed.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A wire tension detection mechanism for a multi-strand spring CNC machine tool, characterized in that: include, The tension detection assembly includes a tension sensor fixedly connected inside the cradle, and a wire guide wheel for guiding the wire rope is connected to the tension sensor; The tension detection and balancing assembly includes a balance bar connected inside the cradle. One end of the balance bar is movably connected to a tension sensor, and the other end of the balance bar is connected to a counterweight with an adjustable center of gravity.

2. The wire tension detection mechanism for multi-strand spring CNC machine tools as described in claim 1, characterized in that: The other end of the balance bar is fixedly connected to a counterweight adjusting screw, the counterweight is connected to the counterweight block, a lower nut is threaded onto the counterweight adjusting screw on the lower side of the counterweight block, and an upper nut is threaded onto the counterweight adjusting screw on the upper side of the counterweight block.

3. The wire tension detection mechanism for multi-strand spring CNC machine tools as described in claim 2, characterized in that: A counterweight adjustment plate is connected to the counterweight adjustment screw between the upper side of the lower nut and the lower side of the counterweight block.

4. The wire tension detection mechanism for multi-strand spring CNC machine tools as described in claim 2, characterized in that: The adjusting screw is threaded onto the balance bar, with the upper end of the adjusting screw abutting against the upper side of the balance bar, and a fixing nut threaded onto the adjusting screw on the lower side of the balance bar.

5. The multi-strand spring CNC machine tool wire tension detection mechanism as described in any one of claims 1 to 3, characterized in that: The cradle is connected to a main shaft, which is rotatably connected to a balance bar via a support bearing. One side of the support bearing in the axial direction abuts against the step of the balance bar, and an end cap is connected to the balance bar on the other side in the axial direction of the support bearing. A fastening nut is threaded onto the main shaft, and the fastening nut abuts against the other side in the axial direction of the support bearing.

6. The wire tension detection mechanism for multi-strand spring CNC machine tools as described in claim 5, characterized in that: The end cap has a number of connection holes arranged on it, and the balance bar has a number of countersunk holes that correspond one-to-one with the connection holes.

7. The wire tension detection mechanism for multi-strand spring CNC machine tools as described in claim 5, characterized in that: The main shaft is threaded onto the cradle, and a connecting nut is threaded onto the main shaft outside the cradle, with the connecting nut abutting against the outer wall of the cradle.

8. The wire tension detection mechanism for multi-strand spring CNC machine tools as described in any one of claims 1 to 3, characterized in that: A connecting support is fixedly connected to the inner side of the cradle, a tension sensor is fixedly connected to the connecting support, a bracket is fixedly connected to the tension sensor, the bracket is fixedly connected to the inner ring of the bearing, and the wire guide wheel is connected to the outer ring of the bearing.

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